path: root/patch-5.18-redhat.patch

 Documentation/admin-guide/kernel-parameters.txt    |   9 +
 Kconfig                                            |   2 +
 Kconfig.redhat                                     |  17 +
 Makefile                                           |  12 +-
 arch/arm/Kconfig                                   |   4 +-
 arch/arm64/Kconfig                                 |   3 +-
 arch/arm64/kernel/acpi.c                           |   4 +
 arch/s390/include/asm/ipl.h                        |   1 +
 arch/s390/kernel/ipl.c                             |   5 +
 arch/s390/kernel/setup.c                           |   4 +
 arch/x86/kernel/cpu/common.c                       |   1 +
 arch/x86/kernel/setup.c                            |  70 ++-
 crypto/rng.c                                       |  73 ++-
 drivers/acpi/apei/hest.c                           |   8 +
 drivers/acpi/irq.c                                 |  17 +-
 drivers/acpi/scan.c                                |   9 +
 drivers/ata/libahci.c                              |  18 +
 drivers/char/ipmi/ipmi_dmi.c                       |  15 +
 drivers/char/ipmi/ipmi_msghandler.c                |  16 +-
 drivers/char/random.c                              |  95 ++++
 drivers/firmware/efi/Makefile                      |   1 +
 drivers/firmware/efi/efi.c                         | 124 +++--
 drivers/firmware/efi/secureboot.c                  |  38 ++
 drivers/hid/hid-rmi.c                              |  64 ---
 drivers/hwtracing/coresight/coresight-etm4x-core.c |  19 +
 drivers/input/rmi4/rmi_driver.c                    | 124 +++--
 drivers/iommu/iommu.c                              |  22 +
 drivers/message/fusion/mptsas.c                    |  10 +
 drivers/message/fusion/mptspi.c                    |  11 +
 drivers/net/ethernet/intel/e1000/e1000_main.c      |   2 +
 drivers/net/team/team.c                            |   2 +
 drivers/net/wireguard/main.c                       |   7 +
 drivers/nvme/host/core.c                           |  22 +-
 drivers/nvme/host/multipath.c                      |  19 +-
 drivers/nvme/host/nvme.h                           |   4 +
 drivers/pci/pci-driver.c                           |  78 ++++
 drivers/pci/quirks.c                               |  24 +
 drivers/scsi/aacraid/linit.c                       |   2 +
 drivers/scsi/be2iscsi/be_main.c                    |   2 +
 drivers/scsi/hpsa.c                                |   4 +
 drivers/scsi/lpfc/lpfc_ids.h                       |  14 +
 drivers/scsi/megaraid/megaraid_sas_base.c          |   4 +
 drivers/scsi/mpt3sas/mpt3sas_scsih.c               |   4 +
 drivers/scsi/qla2xxx/qla_os.c                      |   6 +
 drivers/scsi/qla4xxx/ql4_os.c                      |   2 +
 drivers/usb/core/hub.c                             |   7 +
 drivers/virtio/virtio_mem.c                        |  13 +
 fs/ext4/super.c                                    |   5 +
 fs/xfs/xfs_super.c                                 |   5 +
 include/linux/efi.h                                |  22 +-
 include/linux/kernel.h                             |  19 +
 include/linux/lsm_hook_defs.h                      |   2 +
 include/linux/lsm_hooks.h                          |   6 +
 include/linux/mmzone.h                             |   4 +-
 include/linux/module.h                             |   1 +
 include/linux/panic.h                              |  19 +-
 include/linux/pci.h                                |  16 +
 include/linux/random.h                             |  12 +
 include/linux/rh_kabi.h                            | 515 +++++++++++++++++++++
 include/linux/rmi.h                                |   1 +
 include/linux/security.h                           |   5 +
 init/Kconfig                                       |   2 +-
 kernel/Makefile                                    |   1 +
 kernel/bpf/syscall.c                               |  18 +
 kernel/module.c                                    |   2 +
 kernel/module_signing.c                            |   9 +-
 kernel/panic.c                                     |  14 +
 kernel/rh_messages.c                               | 179 +++++++
 kernel/sysctl.c                                    |   5 +
 mm/cma.c                                           |  10 +
 scripts/mod/modpost.c                              |   8 +
 scripts/tags.sh                                    |   2 +
 security/integrity/platform_certs/load_uefi.c      |   6 +-
 security/lockdown/Kconfig                          |  13 +
 security/lockdown/lockdown.c                       |   1 +
 security/security.c                                |   6 +
 76 files changed, 1729 insertions(+), 191 deletions(-)

diff --git a/Documentation/admin-guide/kernel-parameters.txt b/Documentation/admin-guide/kernel-parameters.txt
index b7ccaa2ea867..bc58b9348bb8 100644
--- a/Documentation/admin-guide/kernel-parameters.txt
+++ b/Documentation/admin-guide/kernel-parameters.txt
@@ -6077,6 +6077,15 @@
 	unknown_nmi_panic
 			[X86] Cause panic on unknown NMI.

+	unprivileged_bpf_disabled=
+			Format: { "0" | "1" | "2" }
+			Sets the initial value of
+			kernel.unprivileged_bpf_disabled sysctl knob.
+			0 - unprivileged bpf() syscall access is enabled.
+			1 - unprivileged bpf() syscall access is disabled permanently.
+			2 - unprivileged bpf() syscall access is disabled.
+			Default value is 2.
+
 	usbcore.authorized_default=
 			[USB] Default USB device authorization:
 			(default -1 = authorized except for wireless USB,
diff --git a/Kconfig b/Kconfig
index 745bc773f567..f57ff40109d7 100644
--- a/Kconfig
+++ b/Kconfig
@@ -30,3 +30,5 @@ source "lib/Kconfig"
 source "lib/Kconfig.debug"

 source "Documentation/Kconfig"
+
+source "Kconfig.redhat"
diff --git a/Kconfig.redhat b/Kconfig.redhat
new file mode 100644
index 000000000000..effb81d04bfd
--- /dev/null
+++ b/Kconfig.redhat
@@ -0,0 +1,17 @@
+# SPDX-License-Identifier: GPL-2.0-only
+#
+# Red Hat specific options
+#
+
+menu "Red Hat options"
+
+config RHEL_DIFFERENCES
+	bool "Remove support for deprecated features"
+	help
+	  Red Hat may choose to deprecate certain features in its kernels.
+	  Enable this option to remove support for hardware that is no
+	  longer supported.
+
+	  Unless you want a restricted kernel, say N here.
+
+endmenu
diff --git a/Makefile b/Makefile
index c28c5d91e5c8..509e4e0c7780 100644
--- a/Makefile
+++ b/Makefile
@@ -18,6 +18,10 @@ $(if $(filter __%, $(MAKECMDGOALS)), \
 PHONY := __all
 __all:

+# Set RHEL variables
+# Use this spot to avoid future merge conflicts
+include Makefile.rhelver
+
 # We are using a recursive build, so we need to do a little thinking
 # to get the ordering right.
 #
@@ -1234,7 +1238,13 @@ define filechk_version.h
 	((c) > 255 ? 255 : (c)))';                                       \
 	echo \#define LINUX_VERSION_MAJOR $(VERSION);                    \
 	echo \#define LINUX_VERSION_PATCHLEVEL $(PATCHLEVEL);            \
-	echo \#define LINUX_VERSION_SUBLEVEL $(SUBLEVEL)
+	echo \#define LINUX_VERSION_SUBLEVEL $(SUBLEVEL);                \
+	echo '#define RHEL_MAJOR $(RHEL_MAJOR)'; \
+	echo '#define RHEL_MINOR $(RHEL_MINOR)'; \
+	echo '#define RHEL_RELEASE_VERSION(a,b) (((a) << 8) + (b))'; \
+	echo '#define RHEL_RELEASE_CODE \
+		$(shell expr $(RHEL_MAJOR) \* 256 + $(RHEL_MINOR))'; \
+	echo '#define RHEL_RELEASE "$(RHEL_RELEASE)"'
 endef

 $(version_h): PATCHLEVEL := $(if $(PATCHLEVEL), $(PATCHLEVEL), 0)
diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig
index c1251856ef77..fefe78477b23 100644
--- a/arch/arm/Kconfig
+++ b/arch/arm/Kconfig
@@ -1486,9 +1486,9 @@ config HIGHMEM
 	  If unsure, say n.

 config HIGHPTE
-	bool "Allocate 2nd-level pagetables from highmem" if EXPERT
+	bool "Allocate 2nd-level pagetables from highmem"
 	depends on HIGHMEM
-	default y
+	default n
 	help
 	  The VM uses one page of physical memory for each page table.
 	  For systems with a lot of processes, this can use a lot of
diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig
index 57c4c995965f..a3c61780e99c 100644
--- a/arch/arm64/Kconfig
+++ b/arch/arm64/Kconfig
@@ -1117,7 +1117,7 @@ endchoice

 config ARM64_FORCE_52BIT
 	bool "Force 52-bit virtual addresses for userspace"
-	depends on ARM64_VA_BITS_52 && EXPERT
+	depends on ARM64_VA_BITS_52
 	help
 	  For systems with 52-bit userspace VAs enabled, the kernel will attempt
 	  to maintain compatibility with older software by providing 48-bit VAs
@@ -1356,6 +1356,7 @@ config XEN
 config FORCE_MAX_ZONEORDER
 	int
 	default "14" if ARM64_64K_PAGES
+	default "13" if (ARCH_THUNDER && !ARM64_64K_PAGES)
 	default "12" if ARM64_16K_PAGES
 	default "11"
 	help
diff --git a/arch/arm64/kernel/acpi.c b/arch/arm64/kernel/acpi.c
index e4dea8db6924..3f17c7b5bd78 100644
--- a/arch/arm64/kernel/acpi.c
+++ b/arch/arm64/kernel/acpi.c
@@ -41,7 +41,11 @@ int acpi_pci_disabled = 1;	/* skip ACPI PCI scan and IRQ initialization */
 EXPORT_SYMBOL(acpi_pci_disabled);

 static bool param_acpi_off __initdata;
+#ifdef CONFIG_RHEL_DIFFERENCES
+static bool param_acpi_on __initdata = true;
+#else
 static bool param_acpi_on __initdata;
+#endif
 static bool param_acpi_force __initdata;

 static int __init parse_acpi(char *arg)
diff --git a/arch/s390/include/asm/ipl.h b/arch/s390/include/asm/ipl.h
index 3f8ee257f9aa..3ab92feb6241 100644
--- a/arch/s390/include/asm/ipl.h
+++ b/arch/s390/include/asm/ipl.h
@@ -128,6 +128,7 @@ int ipl_report_add_component(struct ipl_report *report, struct kexec_buf *kbuf,
 			     unsigned char flags, unsigned short cert);
 int ipl_report_add_certificate(struct ipl_report *report, void *key,
 			       unsigned long addr, unsigned long len);
+bool ipl_get_secureboot(void);

 /*
  * DIAG 308 support
diff --git a/arch/s390/kernel/ipl.c b/arch/s390/kernel/ipl.c
index 28ae7df26c4a..8f5ea21872ff 100644
--- a/arch/s390/kernel/ipl.c
+++ b/arch/s390/kernel/ipl.c
@@ -2216,3 +2216,8 @@ int ipl_report_free(struct ipl_report *report)
 }

 #endif
+
+bool ipl_get_secureboot(void)
+{
+	return !!ipl_secure_flag;
+}
diff --git a/arch/s390/kernel/setup.c b/arch/s390/kernel/setup.c
index 84e23fcc1106..a6ec5247aa18 100644
--- a/arch/s390/kernel/setup.c
+++ b/arch/s390/kernel/setup.c
@@ -49,6 +49,7 @@
 #include <linux/memory.h>
 #include <linux/compat.h>
 #include <linux/start_kernel.h>
+#include <linux/security.h>
 #include <linux/hugetlb.h>
 #include <linux/kmemleak.h>

@@ -964,6 +965,9 @@ void __init setup_arch(char **cmdline_p)

 	log_component_list();

+	if (ipl_get_secureboot())
+		security_lock_kernel_down("Secure IPL mode", LOCKDOWN_INTEGRITY_MAX);
+
 	/* Have one command line that is parsed and saved in /proc/cmdline */
 	/* boot_command_line has been already set up in early.c */
 	*cmdline_p = boot_command_line;
diff --git a/arch/x86/kernel/cpu/common.c b/arch/x86/kernel/cpu/common.c
index ed4417500700..50045296524c 100644
--- a/arch/x86/kernel/cpu/common.c
+++ b/arch/x86/kernel/cpu/common.c
@@ -1447,6 +1447,7 @@ static void __init early_identify_cpu(struct cpuinfo_x86 *c)
 		cpu_detect(c);
 		get_cpu_vendor(c);
 		get_cpu_cap(c);
+		get_model_name(c); /* RHEL: get model name for unsupported check */
 		get_cpu_address_sizes(c);
 		setup_force_cpu_cap(X86_FEATURE_CPUID);
 		cpu_parse_early_param();
diff --git a/arch/x86/kernel/setup.c b/arch/x86/kernel/setup.c
index c95b9ac5a457..560db0f01260 100644
--- a/arch/x86/kernel/setup.c
+++ b/arch/x86/kernel/setup.c
@@ -20,6 +20,7 @@
 #include <linux/root_dev.h>
 #include <linux/hugetlb.h>
 #include <linux/tboot.h>
+#include <linux/security.h>
 #include <linux/usb/xhci-dbgp.h>
 #include <linux/static_call.h>
 #include <linux/swiotlb.h>
@@ -51,6 +52,7 @@
 #include <asm/unwind.h>
 #include <asm/vsyscall.h>
 #include <linux/vmalloc.h>
+#include <asm/intel-family.h>

 /*
  * max_low_pfn_mapped: highest directly mapped pfn < 4 GB
@@ -737,6 +739,51 @@ static void __init early_reserve_memory(void)
 	trim_snb_memory();
 }

+#ifdef CONFIG_RHEL_DIFFERENCES
+
+static void rh_check_supported(void)
+{
+	bool guest;
+
+	guest = (x86_hyper_type != X86_HYPER_NATIVE || boot_cpu_has(X86_FEATURE_HYPERVISOR));
+
+	/* RHEL supports single cpu on guests only */
+	if (((boot_cpu_data.x86_max_cores * smp_num_siblings) == 1) &&
+	    !guest && is_kdump_kernel()) {
+		pr_crit("Detected single cpu native boot.\n");
+		pr_crit("Important:  In this kernel, single threaded, single CPU 64-bit physical systems are unsupported.");
+	}
+
+	/*
+	 * If the RHEL kernel does not support this hardware, the kernel will
+	 * attempt to boot, but no support is provided for this hardware
+	 */
+	switch (boot_cpu_data.x86_vendor) {
+	case X86_VENDOR_AMD:
+	case X86_VENDOR_INTEL:
+		break;
+	default:
+		pr_crit("Detected processor %s %s\n",
+			boot_cpu_data.x86_vendor_id,
+			boot_cpu_data.x86_model_id);
+		mark_hardware_unmaintained("x86 processor", "%s %s", boot_cpu_data.x86_vendor_id,
+					  boot_cpu_data.x86_model_id);
+		break;
+	}
+
+	/*
+	 * Due to the complexity of x86 lapic & ioapic enumeration, and PCI IRQ
+	 * routing, ACPI is required for x86.  acpi=off is a valid debug kernel
+	 * parameter, so just print out a loud warning in case something
+	 * goes wrong (which is most of the time).
+	 */
+	if (acpi_disabled && !guest)
+		pr_crit("ACPI has been disabled or is not available on this hardware.  This may result in a single cpu boot, incorrect PCI IRQ routing, or boot failure.\n");
+}
+#else
+#define rh_check_supported()
+#endif
+
 /*
  * Dump out kernel offset information on panic.
  */
@@ -946,6 +993,13 @@ void __init setup_arch(char **cmdline_p)
 	if (efi_enabled(EFI_BOOT))
 		efi_init();

+	efi_set_secure_boot(boot_params.secure_boot);
+
+#ifdef CONFIG_LOCK_DOWN_IN_EFI_SECURE_BOOT
+	if (efi_enabled(EFI_SECURE_BOOT))
+		security_lock_kernel_down("EFI Secure Boot mode", LOCKDOWN_INTEGRITY_MAX);
+#endif
+
 	dmi_setup();

 	/*
@@ -1115,19 +1169,7 @@ void __init setup_arch(char **cmdline_p)
 	/* Allocate bigger log buffer */
 	setup_log_buf(1);

-	if (efi_enabled(EFI_BOOT)) {
-		switch (boot_params.secure_boot) {
-		case efi_secureboot_mode_disabled:
-			pr_info("Secure boot disabled\n");
-			break;
-		case efi_secureboot_mode_enabled:
-			pr_info("Secure boot enabled\n");
-			break;
-		default:
-			pr_info("Secure boot could not be determined\n");
-			break;
-		}
-	}
+	efi_set_secure_boot(boot_params.secure_boot);

 	reserve_initrd();

@@ -1240,6 +1282,8 @@ void __init setup_arch(char **cmdline_p)
 		efi_apply_memmap_quirks();
 #endif

+	rh_check_supported();
+
 	unwind_init();
 }

diff --git a/crypto/rng.c b/crypto/rng.c
index fea082b25fe4..50a9d040bed1 100644
--- a/crypto/rng.c
+++ b/crypto/rng.c
@@ -11,14 +11,17 @@
 #include <linux/atomic.h>
 #include <crypto/internal/rng.h>
 #include <linux/err.h>
+#include <linux/fips.h>
+#include <linux/kernel.h>
 #include <linux/module.h>
 #include <linux/mutex.h>
 #include <linux/random.h>
 #include <linux/seq_file.h>
+#include <linux/sched.h>
+#include <linux/sched/signal.h>
 #include <linux/slab.h>
 #include <linux/string.h>
 #include <linux/cryptouser.h>
-#include <linux/compiler.h>
 #include <net/netlink.h>

 #include "internal.h"
@@ -224,5 +227,73 @@ void crypto_unregister_rngs(struct rng_alg *algs, int count)
 }
 EXPORT_SYMBOL_GPL(crypto_unregister_rngs);

+static ssize_t crypto_devrandom_read(void __user *buf, size_t buflen)
+{
+	u8 tmp[256];
+	ssize_t ret;
+
+	if (!buflen)
+		return 0;
+
+	ret = crypto_get_default_rng();
+	if (ret)
+		return ret;
+
+	for (;;) {
+		int err;
+		int i;
+
+		i = min_t(int, buflen, sizeof(tmp));
+		err = crypto_rng_get_bytes(crypto_default_rng, tmp, i);
+		if (err) {
+			ret = err;
+			break;
+		}
+
+		if (copy_to_user(buf, tmp, i)) {
+			ret = -EFAULT;
+			break;
+		}
+
+		buflen -= i;
+		buf += i;
+		ret += i;
+
+		if (!buflen)
+			break;
+
+		if (need_resched()) {
+			if (signal_pending(current))
+				break;
+			schedule();
+		}
+	}
+
+	crypto_put_default_rng();
+	memzero_explicit(tmp, sizeof(tmp));
+
+	return ret;
+}
+
+static const struct random_extrng crypto_devrandom_rng = {
+	.extrng_read = crypto_devrandom_read,
+	.owner = THIS_MODULE,
+};
+
+static int __init crypto_rng_init(void)
+{
+	if (fips_enabled)
+		random_register_extrng(&crypto_devrandom_rng);
+	return 0;
+}
+
+static void __exit crypto_rng_exit(void)
+{
+	random_unregister_extrng();
+}
+
+late_initcall(crypto_rng_init);
+module_exit(crypto_rng_exit);
+
 MODULE_LICENSE("GPL");
 MODULE_DESCRIPTION("Random Number Generator");
diff --git a/drivers/acpi/apei/hest.c b/drivers/acpi/apei/hest.c
index 6aef1ee5e1bd..8f146b1b4972 100644
--- a/drivers/acpi/apei/hest.c
+++ b/drivers/acpi/apei/hest.c
@@ -96,6 +96,14 @@ static int apei_hest_parse(apei_hest_func_t func, void *data)
 	if (hest_disable || !hest_tab)
 		return -EINVAL;

+#ifdef CONFIG_ARM64
+	/* Ignore broken firmware */
+	if (!strncmp(hest_tab->header.oem_id, "HPE   ", 6) &&
+	    !strncmp(hest_tab->header.oem_table_id, "ProLiant", 8) &&
+	    MIDR_IMPLEMENTOR(read_cpuid_id()) == ARM_CPU_IMP_APM)
+		return -EINVAL;
+#endif
+
 	hest_hdr = (struct acpi_hest_header *)(hest_tab + 1);
 	for (i = 0; i < hest_tab->error_source_count; i++) {
 		len = hest_esrc_len(hest_hdr);
diff --git a/drivers/acpi/irq.c b/drivers/acpi/irq.c
index c68e694fca26..146cba5ae5bc 100644
--- a/drivers/acpi/irq.c
+++ b/drivers/acpi/irq.c
@@ -130,6 +130,7 @@ struct acpi_irq_parse_one_ctx {
 	unsigned int index;
 	unsigned long *res_flags;
 	struct irq_fwspec *fwspec;
+	bool skip_producer_check;
 };

 /**
@@ -201,7 +202,8 @@ static acpi_status acpi_irq_parse_one_cb(struct acpi_resource *ares,
 		return AE_CTRL_TERMINATE;
 	case ACPI_RESOURCE_TYPE_EXTENDED_IRQ:
 		eirq = &ares->data.extended_irq;
-		if (eirq->producer_consumer == ACPI_PRODUCER)
+		if (!ctx->skip_producer_check &&
+		    eirq->producer_consumer == ACPI_PRODUCER)
 			return AE_OK;
 		if (ctx->index >= eirq->interrupt_count) {
 			ctx->index -= eirq->interrupt_count;
@@ -236,8 +238,19 @@ static acpi_status acpi_irq_parse_one_cb(struct acpi_resource *ares,
 static int acpi_irq_parse_one(acpi_handle handle, unsigned int index,
 			      struct irq_fwspec *fwspec, unsigned long *flags)
 {
-	struct acpi_irq_parse_one_ctx ctx = { -EINVAL, index, flags, fwspec };
+	struct acpi_irq_parse_one_ctx ctx = { -EINVAL, index, flags, fwspec, false };

+	/*
+	 * Firmware on arm64-based HPE m400 platform incorrectly marks
+	 * its UART interrupt as ACPI_PRODUCER rather than ACPI_CONSUMER.
+	 * Don't do the producer/consumer check for that device.
+	 */
+	if (IS_ENABLED(CONFIG_ARM64)) {
+		struct acpi_device *adev = acpi_bus_get_acpi_device(handle);
+
+		if (adev && !strcmp(acpi_device_hid(adev), "APMC0D08"))
+			ctx.skip_producer_check = true;
+	}
 	acpi_walk_resources(handle, METHOD_NAME__CRS, acpi_irq_parse_one_cb, &ctx);
 	return ctx.rc;
 }
diff --git a/drivers/acpi/scan.c b/drivers/acpi/scan.c
index 9efbfe087de7..90f4595c8b3a 100644
--- a/drivers/acpi/scan.c
+++ b/drivers/acpi/scan.c
@@ -1779,6 +1779,15 @@ static bool acpi_device_enumeration_by_parent(struct acpi_device *device)
 	if (!acpi_match_device_ids(device, ignore_serial_bus_ids))
 		return false;

+	/*
+	 * Firmware on some arm64 X-Gene platforms will make the UART
+	 * device appear as both a UART and a slave of that UART. Just
+	 * bail out here for X-Gene UARTs.
+	 */
+	if (IS_ENABLED(CONFIG_ARM64) &&
+	    !strcmp(acpi_device_hid(device), "APMC0D08"))
+		return false;
+
 	INIT_LIST_HEAD(&resource_list);
 	acpi_dev_get_resources(device, &resource_list,
 			       acpi_check_serial_bus_slave,
diff --git a/drivers/ata/libahci.c b/drivers/ata/libahci.c
index cf8c7fd59ada..28a8189be64f 100644
--- a/drivers/ata/libahci.c
+++ b/drivers/ata/libahci.c
@@ -690,6 +690,24 @@ int ahci_stop_engine(struct ata_port *ap)
 	tmp &= ~PORT_CMD_START;
 	writel(tmp, port_mmio + PORT_CMD);

+#ifdef CONFIG_ARM64
+	/* Rev Ax of Cavium CN99XX needs a hack for port stop */
+	if (dev_is_pci(ap->host->dev) &&
+	    to_pci_dev(ap->host->dev)->vendor == 0x14e4 &&
+	    to_pci_dev(ap->host->dev)->device == 0x9027 &&
+	    midr_is_cpu_model_range(read_cpuid_id(),
+			MIDR_CPU_MODEL(ARM_CPU_IMP_BRCM, BRCM_CPU_PART_VULCAN),
+			MIDR_CPU_VAR_REV(0, 0),
+			MIDR_CPU_VAR_REV(0, MIDR_REVISION_MASK))) {
+		tmp = readl(hpriv->mmio + 0x8000);
+		udelay(100);
+		writel(tmp | (1 << 26), hpriv->mmio + 0x8000);
+		udelay(100);
+		writel(tmp & ~(1 << 26), hpriv->mmio + 0x8000);
+		dev_warn(ap->host->dev, "CN99XX SATA reset workaround applied\n");
+	}
+#endif
+
 	/* wait for engine to stop. This could be as long as 500 msec */
 	tmp = ata_wait_register(ap, port_mmio + PORT_CMD,
 				PORT_CMD_LIST_ON, PORT_CMD_LIST_ON, 1, 500);
diff --git a/drivers/char/ipmi/ipmi_dmi.c b/drivers/char/ipmi/ipmi_dmi.c
index bbf7029e224b..cf7faa970dd6 100644
--- a/drivers/char/ipmi/ipmi_dmi.c
+++ b/drivers/char/ipmi/ipmi_dmi.c
@@ -215,6 +215,21 @@ static int __init scan_for_dmi_ipmi(void)
 {
 	const struct dmi_device *dev = NULL;

+#ifdef CONFIG_ARM64
+	/* RHEL-only
+	 * If this is ARM-based HPE m400, return now, because that platform
+	 * reports the host-side ipmi address as intel port-io space, which
+	 * does not exist in the ARM architecture.
+	 */
+	const char *dmistr = dmi_get_system_info(DMI_PRODUCT_NAME);
+
+	if (dmistr && (strcmp("ProLiant m400 Server", dmistr) == 0)) {
+		pr_debug("%s does not support host ipmi\n", dmistr);
+		return 0;
+	}
+	/* END RHEL-only */
+#endif
+
 	while ((dev = dmi_find_device(DMI_DEV_TYPE_IPMI, NULL, dev)))
 		dmi_decode_ipmi((const struct dmi_header *) dev->device_data);

diff --git a/drivers/char/ipmi/ipmi_msghandler.c b/drivers/char/ipmi/ipmi_msghandler.c
index c59265146e9c..caa8458edde2 100644
--- a/drivers/char/ipmi/ipmi_msghandler.c
+++ b/drivers/char/ipmi/ipmi_msghandler.c
@@ -35,6 +35,7 @@
 #include <linux/uuid.h>
 #include <linux/nospec.h>
 #include <linux/vmalloc.h>
+#include <linux/dmi.h>
 #include <linux/delay.h>

 #define IPMI_DRIVER_VERSION "39.2"
@@ -5422,8 +5423,21 @@ static int __init ipmi_init_msghandler_mod(void)
 {
 	int rv;

-	pr_info("version " IPMI_DRIVER_VERSION "\n");
+#ifdef CONFIG_ARM64
+	/* RHEL-only
+	 * If this is ARM-based HPE m400, return now, because that platform
+	 * reports the host-side ipmi address as intel port-io space, which
+	 * does not exist in the ARM architecture.
+	 */
+	const char *dmistr = dmi_get_system_info(DMI_PRODUCT_NAME);

+	if (dmistr && (strcmp("ProLiant m400 Server", dmistr) == 0)) {
+		pr_debug("%s does not support host ipmi\n", dmistr);
+		return -ENOSYS;
+	}
+	/* END RHEL-only */
+#endif
+	pr_info("version " IPMI_DRIVER_VERSION "\n");
 	mutex_lock(&ipmi_interfaces_mutex);
 	rv = ipmi_register_driver();
 	mutex_unlock(&ipmi_interfaces_mutex);
diff --git a/drivers/char/random.c b/drivers/char/random.c
index 66ce7c03a142..e6c0d7e119c7 100644
--- a/drivers/char/random.c
+++ b/drivers/char/random.c
@@ -52,6 +52,7 @@
 #include <linux/syscalls.h>
 #include <linux/completion.h>
 #include <linux/uuid.h>
+#include <linux/rcupdate.h>
 #include <linux/uaccess.h>
 #include <crypto/chacha.h>
 #include <crypto/blake2s.h>
@@ -60,6 +61,11 @@
 #include <asm/irq_regs.h>
 #include <asm/io.h>

+/*
+ * Hook for external RNG.
+ */
+static const struct random_extrng __rcu *extrng;
+
 /*********************************************************************
  *
  * Initialization and readiness waiting.
@@ -95,6 +101,9 @@ static int ratelimit_disable __read_mostly;
 module_param_named(ratelimit_disable, ratelimit_disable, int, 0644);
 MODULE_PARM_DESC(ratelimit_disable, "Disable random ratelimit suppression");

+static const struct file_operations extrng_random_fops;
+static const struct file_operations extrng_urandom_fops;
+
 /*
  * Returns whether or not the input pool has been seeded and thus guaranteed
  * to supply cryptographically secure random numbers. This applies to: the
@@ -575,6 +584,63 @@ static ssize_t get_random_bytes_user(void __user *buf, size_t nbytes)
 	return ret;
 }

+static __poll_t
+extrng_poll(struct file *file, poll_table * wait)
+{
+	/* extrng pool is always full, always read, no writes */
+	return EPOLLIN | EPOLLRDNORM;
+}
+
+static int random_open(struct inode *inode, struct file *filp)
+{
+	const struct random_extrng *rng;
+
+	rcu_read_lock();
+	rng = rcu_dereference(extrng);
+	if (rng && !try_module_get(rng->owner))
+		rng = NULL;
+	rcu_read_unlock();
+
+	if (!rng)
+		return 0;
+
+	filp->f_op = &extrng_random_fops;
+	filp->private_data = rng->owner;
+
+	return 0;
+}
+
+static int urandom_open(struct inode *inode, struct file *filp)
+{
+	const struct random_extrng *rng;
+
+	rcu_read_lock();
+	rng = rcu_dereference(extrng);
+	if (rng && !try_module_get(rng->owner))
+		rng = NULL;
+	rcu_read_unlock();
+
+	if (!rng)
+		return 0;
+
+	filp->f_op = &extrng_urandom_fops;
+	filp->private_data = rng->owner;
+
+	return 0;
+}
+
+static int extrng_release(struct inode *inode, struct file *filp)
+{
+	module_put(filp->private_data);
+	return 0;
+}
+
+static ssize_t
+extrng_read(struct file *file, char __user *buf, size_t nbytes, loff_t *ppos)
+{
+	return rcu_dereference_raw(extrng)->extrng_read(buf, nbytes);
+}
+
 /*
  * Batched entropy returns random integers. The quality of the random
  * number is good as /dev/urandom. In order to ensure that the randomness
@@ -1167,6 +1233,19 @@ void add_bootloader_randomness(const void *buf, size_t size)
 }
 EXPORT_SYMBOL_GPL(add_bootloader_randomness);

+void random_register_extrng(const struct random_extrng *rng)
+{
+	rcu_assign_pointer(extrng, rng);
+}
+EXPORT_SYMBOL_GPL(random_register_extrng);
+
+void random_unregister_extrng(void)
+{
+	RCU_INIT_POINTER(extrng, NULL);
+	synchronize_rcu();
+}
+EXPORT_SYMBOL_GPL(random_unregister_extrng);
+
 #if IS_ENABLED(CONFIG_VMGENID)
 static BLOCKING_NOTIFIER_HEAD(vmfork_chain);

@@ -1454,6 +1533,9 @@ static void try_to_generate_entropy(void)
 SYSCALL_DEFINE3(getrandom, char __user *, buf, size_t, count, unsigned int,
 		flags)
 {
+	const struct random_extrng *rng;
+	int ret;
+
 	if (flags & ~(GRND_NONBLOCK | GRND_RANDOM | GRND_INSECURE))
 		return -EINVAL;

@@ -1467,6 +1549,18 @@ SYSCALL_DEFINE3(getrandom, char __user *, buf, size_t, count, unsigned int,
 	if (count > INT_MAX)
 		count = INT_MAX;

+	rcu_read_lock();
+	rng = rcu_dereference(extrng);
+	if (rng && !try_module_get(rng->owner))
+		rng = NULL;
+	rcu_read_unlock();
+
+	if (rng) {
+		ret = rng->extrng_read(buf, count);
+		module_put(rng->owner);
+		return ret;
+	}
+
 	if (!(flags & GRND_INSECURE) && !crng_ready()) {
 		int ret;

@@ -1620,6 +1714,7 @@ static int random_fasync(int fd, struct file *filp, int on)
 }

 const struct file_operations random_fops = {
+	.open = random_open,
 	.read = random_read,
 	.write = random_write,
 	.poll = random_poll,
diff --git a/drivers/firmware/efi/Makefile b/drivers/firmware/efi/Makefile
index c02ff25dd477..d860f8eb9a81 100644
--- a/drivers/firmware/efi/Makefile
+++ b/drivers/firmware/efi/Makefile
@@ -28,6 +28,7 @@ obj-$(CONFIG_EFI_FAKE_MEMMAP)		+= fake_map.o
 obj-$(CONFIG_EFI_BOOTLOADER_CONTROL)	+= efibc.o
 obj-$(CONFIG_EFI_TEST)			+= test/
 obj-$(CONFIG_EFI_DEV_PATH_PARSER)	+= dev-path-parser.o
+obj-$(CONFIG_EFI)			+= secureboot.o
 obj-$(CONFIG_APPLE_PROPERTIES)		+= apple-properties.o
 obj-$(CONFIG_EFI_RCI2_TABLE)		+= rci2-table.o
 obj-$(CONFIG_EFI_EMBEDDED_FIRMWARE)	+= embedded-firmware.o
diff --git a/drivers/firmware/efi/efi.c b/drivers/firmware/efi/efi.c
index 5502e176d51b..93b61ca552d6 100644
--- a/drivers/firmware/efi/efi.c
+++ b/drivers/firmware/efi/efi.c
@@ -31,6 +31,7 @@
 #include <linux/ucs2_string.h>
 #include <linux/memblock.h>
 #include <linux/security.h>
+#include <linux/bsearch.h>

 #include <asm/early_ioremap.h>

@@ -851,40 +852,101 @@ int efi_mem_type(unsigned long phys_addr)
 }
 #endif

+struct efi_error_code {
+	efi_status_t status;
+	int errno;
+	const char *description;
+};
+
+static const struct efi_error_code efi_error_codes[] = {
+	{ EFI_SUCCESS, 0, "Success"},
+#if 0
+	{ EFI_LOAD_ERROR, -EPICK_AN_ERRNO, "Load Error"},
+#endif
+	{ EFI_INVALID_PARAMETER, -EINVAL, "Invalid Parameter"},
+	{ EFI_UNSUPPORTED, -ENOSYS, "Unsupported"},
+	{ EFI_BAD_BUFFER_SIZE, -ENOSPC, "Bad Buffer Size"},
+	{ EFI_BUFFER_TOO_SMALL, -ENOSPC, "Buffer Too Small"},
+	{ EFI_NOT_READY, -EAGAIN, "Not Ready"},
+	{ EFI_DEVICE_ERROR, -EIO, "Device Error"},
+	{ EFI_WRITE_PROTECTED, -EROFS, "Write Protected"},
+	{ EFI_OUT_OF_RESOURCES, -ENOMEM, "Out of Resources"},
+#if 0
+	{ EFI_VOLUME_CORRUPTED, -EPICK_AN_ERRNO, "Volume Corrupt"},
+	{ EFI_VOLUME_FULL, -EPICK_AN_ERRNO, "Volume Full"},
+	{ EFI_NO_MEDIA, -EPICK_AN_ERRNO, "No Media"},
+	{ EFI_MEDIA_CHANGED, -EPICK_AN_ERRNO, "Media changed"},
+#endif
+	{ EFI_NOT_FOUND, -ENOENT, "Not Found"},
+#if 0
+	{ EFI_ACCESS_DENIED, -EPICK_AN_ERRNO, "Access Denied"},
+	{ EFI_NO_RESPONSE, -EPICK_AN_ERRNO, "No Response"},
+	{ EFI_NO_MAPPING, -EPICK_AN_ERRNO, "No mapping"},
+	{ EFI_TIMEOUT, -EPICK_AN_ERRNO, "Time out"},
+	{ EFI_NOT_STARTED, -EPICK_AN_ERRNO, "Not started"},
+	{ EFI_ALREADY_STARTED, -EPICK_AN_ERRNO, "Already started"},
+#endif
+	{ EFI_ABORTED, -EINTR, "Aborted"},
+#if 0
+	{ EFI_ICMP_ERROR, -EPICK_AN_ERRNO, "ICMP Error"},
+	{ EFI_TFTP_ERROR, -EPICK_AN_ERRNO, "TFTP Error"},
+	{ EFI_PROTOCOL_ERROR, -EPICK_AN_ERRNO, "Protocol Error"},
+	{ EFI_INCOMPATIBLE_VERSION, -EPICK_AN_ERRNO, "Incompatible Version"},
+#endif
+	{ EFI_SECURITY_VIOLATION, -EACCES, "Security Policy Violation"},
+#if 0
+	{ EFI_CRC_ERROR, -EPICK_AN_ERRNO, "CRC Error"},
+	{ EFI_END_OF_MEDIA, -EPICK_AN_ERRNO, "End of Media"},
+	{ EFI_END_OF_FILE, -EPICK_AN_ERRNO, "End of File"},
+	{ EFI_INVALID_LANGUAGE, -EPICK_AN_ERRNO, "Invalid Languages"},
+	{ EFI_COMPROMISED_DATA, -EPICK_AN_ERRNO, "Compromised Data"},
+
+	// warnings
+	{ EFI_WARN_UNKOWN_GLYPH, -EPICK_AN_ERRNO, "Warning Unknown Glyph"},
+	{ EFI_WARN_DELETE_FAILURE, -EPICK_AN_ERRNO, "Warning Delete Failure"},
+	{ EFI_WARN_WRITE_FAILURE, -EPICK_AN_ERRNO, "Warning Write Failure"},
+	{ EFI_WARN_BUFFER_TOO_SMALL, -EPICK_AN_ERRNO, "Warning Buffer Too Small"},
+#endif
+};
+
+static int
+efi_status_cmp_bsearch(const void *key, const void *item)
+{
+	u64 status = (u64)(uintptr_t)key;
+	struct efi_error_code *code = (struct efi_error_code *)item;
+
+	if (status < code->status)
+		return -1;
+	if (status > code->status)
+		return 1;
+	return 0;
+}
+
 int efi_status_to_err(efi_status_t status)
 {
-	int err;
-
-	switch (status) {
-	case EFI_SUCCESS:
-		err = 0;
-		break;
-	case EFI_INVALID_PARAMETER:
-		err = -EINVAL;
-		break;
-	case EFI_OUT_OF_RESOURCES:
-		err = -ENOSPC;
-		break;
-	case EFI_DEVICE_ERROR:
-		err = -EIO;
-		break;
-	case EFI_WRITE_PROTECTED:
-		err = -EROFS;
-		break;
-	case EFI_SECURITY_VIOLATION:
-		err = -EACCES;
-		break;
-	case EFI_NOT_FOUND:
-		err = -ENOENT;
-		break;
-	case EFI_ABORTED:
-		err = -EINTR;
-		break;
-	default:
-		err = -EINVAL;
-	}
+	struct efi_error_code *found;
+	size_t num = sizeof(efi_error_codes) / sizeof(struct efi_error_code);

-	return err;
+	found = bsearch((void *)(uintptr_t)status, efi_error_codes,
+			sizeof(struct efi_error_code), num,
+			efi_status_cmp_bsearch);
+	if (!found)
+		return -EINVAL;
+	return found->errno;
+}
+
+const char *
+efi_status_to_str(efi_status_t status)
+{
+	struct efi_error_code *found;
+	size_t num = sizeof(efi_error_codes) / sizeof(struct efi_error_code);
+
+	found = bsearch((void *)(uintptr_t)status, efi_error_codes,
+			sizeof(struct efi_error_code), num,
+			efi_status_cmp_bsearch);
+	if (!found)
+		return "Unknown error code";
+	return found->description;
 }

 static DEFINE_SPINLOCK(efi_mem_reserve_persistent_lock);
diff --git a/drivers/firmware/efi/secureboot.c b/drivers/firmware/efi/secureboot.c
new file mode 100644
index 000000000000..de0a3714a5d4
--- /dev/null
+++ b/drivers/firmware/efi/secureboot.c
@@ -0,0 +1,38 @@
+/* Core kernel secure boot support.
+ *
+ * Copyright (C) 2017 Red Hat, Inc. All Rights Reserved.
+ * Written by David Howells (dhowells@redhat.com)
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public Licence
+ * as published by the Free Software Foundation; either version
+ * 2 of the Licence, or (at your option) any later version.
+ */
+
+#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
+
+#include <linux/efi.h>
+#include <linux/kernel.h>
+#include <linux/printk.h>
+
+/*
+ * Decide what to do when UEFI secure boot mode is enabled.
+ */
+void __init efi_set_secure_boot(enum efi_secureboot_mode mode)
+{
+	if (efi_enabled(EFI_BOOT)) {
+		switch (mode) {
+		case efi_secureboot_mode_disabled:
+			pr_info("Secure boot disabled\n");
+			break;
+		case efi_secureboot_mode_enabled:
+			set_bit(EFI_SECURE_BOOT, &efi.flags);
+			pr_info("Secure boot enabled\n");
+			break;
+		default:
+			pr_warn("Secure boot could not be determined (mode %u)\n",
+				   mode);
+			break;
+		}
+	}
+}
diff --git a/drivers/hid/hid-rmi.c b/drivers/hid/hid-rmi.c
index 311eee599ce9..2460c6bd46f8 100644
--- a/drivers/hid/hid-rmi.c
+++ b/drivers/hid/hid-rmi.c
@@ -322,19 +322,12 @@ static int rmi_input_event(struct hid_device *hdev, u8 *data, int size)
 {
 	struct rmi_data *hdata = hid_get_drvdata(hdev);
 	struct rmi_device *rmi_dev = hdata->xport.rmi_dev;
-	unsigned long flags;

 	if (!(test_bit(RMI_STARTED, &hdata->flags)))
 		return 0;

-	local_irq_save(flags);
-
 	rmi_set_attn_data(rmi_dev, data[1], &data[2], size - 2);

-	generic_handle_irq(hdata->rmi_irq);
-
-	local_irq_restore(flags);
-
 	return 1;
 }

@@ -591,56 +584,6 @@ static const struct rmi_transport_ops hid_rmi_ops = {
 	.reset		= rmi_hid_reset,
 };

-static void rmi_irq_teardown(void *data)
-{
-	struct rmi_data *hdata = data;
-	struct irq_domain *domain = hdata->domain;
-
-	if (!domain)
-		return;
-
-	irq_dispose_mapping(irq_find_mapping(domain, 0));
-
-	irq_domain_remove(domain);
-	hdata->domain = NULL;
-	hdata->rmi_irq = 0;
-}
-
-static int rmi_irq_map(struct irq_domain *h, unsigned int virq,
-		       irq_hw_number_t hw_irq_num)
-{
-	irq_set_chip_and_handler(virq, &dummy_irq_chip, handle_simple_irq);
-
-	return 0;
-}
-
-static const struct irq_domain_ops rmi_irq_ops = {
-	.map = rmi_irq_map,
-};
-
-static int rmi_setup_irq_domain(struct hid_device *hdev)
-{
-	struct rmi_data *hdata = hid_get_drvdata(hdev);
-	int ret;
-
-	hdata->domain = irq_domain_create_linear(hdev->dev.fwnode, 1,
-						 &rmi_irq_ops, hdata);
-	if (!hdata->domain)
-		return -ENOMEM;
-
-	ret = devm_add_action_or_reset(&hdev->dev, &rmi_irq_teardown, hdata);
-	if (ret)
-		return ret;
-
-	hdata->rmi_irq = irq_create_mapping(hdata->domain, 0);
-	if (hdata->rmi_irq <= 0) {
-		hid_err(hdev, "Can't allocate an IRQ\n");
-		return hdata->rmi_irq < 0 ? hdata->rmi_irq : -ENXIO;
-	}
-
-	return 0;
-}
-
 static int rmi_probe(struct hid_device *hdev, const struct hid_device_id *id)
 {
 	struct rmi_data *data = NULL;
@@ -713,18 +656,11 @@ static int rmi_probe(struct hid_device *hdev, const struct hid_device_id *id)

 	mutex_init(&data->page_mutex);

-	ret = rmi_setup_irq_domain(hdev);
-	if (ret) {
-		hid_err(hdev, "failed to allocate IRQ domain\n");
-		return ret;
-	}
-
 	if (data->device_flags & RMI_DEVICE_HAS_PHYS_BUTTONS)
 		rmi_hid_pdata.gpio_data.disable = true;

 	data->xport.dev = hdev->dev.parent;
 	data->xport.pdata = rmi_hid_pdata;
-	data->xport.pdata.irq = data->rmi_irq;
 	data->xport.proto_name = "hid";
 	data->xport.ops = &hid_rmi_ops;

diff --git a/drivers/hwtracing/coresight/coresight-etm4x-core.c b/drivers/hwtracing/coresight/coresight-etm4x-core.c
index 7f416a12000e..68be4afaa58a 100644
--- a/drivers/hwtracing/coresight/coresight-etm4x-core.c
+++ b/drivers/hwtracing/coresight/coresight-etm4x-core.c
@@ -9,6 +9,7 @@
 #include <linux/init.h>
 #include <linux/types.h>
 #include <linux/device.h>
+#include <linux/dmi.h>
 #include <linux/io.h>
 #include <linux/err.h>
 #include <linux/fs.h>
@@ -2171,6 +2172,16 @@ static const struct amba_id etm4_ids[] = {
 	{},
 };

+static const struct dmi_system_id broken_coresight[] = {
+	{
+		.matches = {
+			DMI_MATCH(DMI_SYS_VENDOR, "HPE"),
+			DMI_MATCH(DMI_PRODUCT_NAME, "Apollo 70"),
+		},
+	},
+	{ }	/* terminating entry */
+};
+
 MODULE_DEVICE_TABLE(amba, etm4_ids);

 static struct amba_driver etm4x_amba_driver = {
@@ -2204,6 +2215,11 @@ static int __init etm4x_init(void)
 {
 	int ret;

+	if (dmi_check_system(broken_coresight)) {
+		pr_info("ETM4 disabled due to firmware bug\n");
+		return 0;
+	}
+
 	ret = etm4_pm_setup();

 	/* etm4_pm_setup() does its own cleanup - exit on error */
@@ -2230,6 +2246,9 @@ static int __init etm4x_init(void)

 static void __exit etm4x_exit(void)
 {
+	if (dmi_check_system(broken_coresight))
+		return;
+
 	amba_driver_unregister(&etm4x_amba_driver);
 	platform_driver_unregister(&etm4_platform_driver);
 	etm4_pm_clear();
diff --git a/drivers/input/rmi4/rmi_driver.c b/drivers/input/rmi4/rmi_driver.c
index 258d5fe3d395..f7298e3dc8f3 100644
--- a/drivers/input/rmi4/rmi_driver.c
+++ b/drivers/input/rmi4/rmi_driver.c
@@ -182,34 +182,47 @@ void rmi_set_attn_data(struct rmi_device *rmi_dev, unsigned long irq_status,
 	attn_data.data = fifo_data;

 	kfifo_put(&drvdata->attn_fifo, attn_data);
+
+	schedule_work(&drvdata->attn_work);
 }
 EXPORT_SYMBOL_GPL(rmi_set_attn_data);

-static irqreturn_t rmi_irq_fn(int irq, void *dev_id)
+static void attn_callback(struct work_struct *work)
 {
-	struct rmi_device *rmi_dev = dev_id;
-	struct rmi_driver_data *drvdata = dev_get_drvdata(&rmi_dev->dev);
+	struct rmi_driver_data *drvdata = container_of(work,
+							struct rmi_driver_data,
+							attn_work);
 	struct rmi4_attn_data attn_data = {0};
 	int ret, count;

 	count = kfifo_get(&drvdata->attn_fifo, &attn_data);
-	if (count) {
-		*(drvdata->irq_status) = attn_data.irq_status;
-		drvdata->attn_data = attn_data;
-	}
+	if (!count)
+		return;

-	ret = rmi_process_interrupt_requests(rmi_dev);
+	*(drvdata->irq_status) = attn_data.irq_status;
+	drvdata->attn_data = attn_data;
+
+	ret = rmi_process_interrupt_requests(drvdata->rmi_dev);
 	if (ret)
-		rmi_dbg(RMI_DEBUG_CORE, &rmi_dev->dev,
+		rmi_dbg(RMI_DEBUG_CORE, &drvdata->rmi_dev->dev,
 			"Failed to process interrupt request: %d\n", ret);

-	if (count) {
-		kfree(attn_data.data);
-		drvdata->attn_data.data = NULL;
-	}
+	kfree(attn_data.data);
+	drvdata->attn_data.data = NULL;

 	if (!kfifo_is_empty(&drvdata->attn_fifo))
-		return rmi_irq_fn(irq, dev_id);
+		schedule_work(&drvdata->attn_work);
+}
+
+static irqreturn_t rmi_irq_fn(int irq, void *dev_id)
+{
+	struct rmi_device *rmi_dev = dev_id;
+	int ret;
+
+	ret = rmi_process_interrupt_requests(rmi_dev);
+	if (ret)
+		rmi_dbg(RMI_DEBUG_CORE, &rmi_dev->dev,
+			"Failed to process interrupt request: %d\n", ret);

 	return IRQ_HANDLED;
 }
@@ -217,7 +230,6 @@ static irqreturn_t rmi_irq_fn(int irq, void *dev_id)
 static int rmi_irq_init(struct rmi_device *rmi_dev)
 {
 	struct rmi_device_platform_data *pdata = rmi_get_platform_data(rmi_dev);
-	struct rmi_driver_data *data = dev_get_drvdata(&rmi_dev->dev);
 	int irq_flags = irq_get_trigger_type(pdata->irq);
 	int ret;

@@ -235,8 +247,6 @@ static int rmi_irq_init(struct rmi_device *rmi_dev)
 		return ret;
 	}

-	data->enabled = true;
-
 	return 0;
 }

@@ -886,23 +896,27 @@ void rmi_enable_irq(struct rmi_device *rmi_dev, bool clear_wake)
 	if (data->enabled)
 		goto out;

-	enable_irq(irq);
-	data->enabled = true;
-	if (clear_wake && device_may_wakeup(rmi_dev->xport->dev)) {
-		retval = disable_irq_wake(irq);
-		if (retval)
-			dev_warn(&rmi_dev->dev,
-				 "Failed to disable irq for wake: %d\n",
-				 retval);
-	}
+	if (irq) {
+		enable_irq(irq);
+		data->enabled = true;
+		if (clear_wake && device_may_wakeup(rmi_dev->xport->dev)) {
+			retval = disable_irq_wake(irq);
+			if (retval)
+				dev_warn(&rmi_dev->dev,
+					 "Failed to disable irq for wake: %d\n",
+					 retval);
+		}

-	/*
-	 * Call rmi_process_interrupt_requests() after enabling irq,
-	 * otherwise we may lose interrupt on edge-triggered systems.
-	 */
-	irq_flags = irq_get_trigger_type(pdata->irq);
-	if (irq_flags & IRQ_TYPE_EDGE_BOTH)
-		rmi_process_interrupt_requests(rmi_dev);
+		/*
+		 * Call rmi_process_interrupt_requests() after enabling irq,
+		 * otherwise we may lose interrupt on edge-triggered systems.
+		 */
+		irq_flags = irq_get_trigger_type(pdata->irq);
+		if (irq_flags & IRQ_TYPE_EDGE_BOTH)
+			rmi_process_interrupt_requests(rmi_dev);
+	} else {
+		data->enabled = true;
+	}

 out:
 	mutex_unlock(&data->enabled_mutex);
@@ -922,20 +936,22 @@ void rmi_disable_irq(struct rmi_device *rmi_dev, bool enable_wake)
 		goto out;

 	data->enabled = false;
-	disable_irq(irq);
-	if (enable_wake && device_may_wakeup(rmi_dev->xport->dev)) {
-		retval = enable_irq_wake(irq);
-		if (retval)
-			dev_warn(&rmi_dev->dev,
-				 "Failed to enable irq for wake: %d\n",
-				 retval);
-	}
-
-	/* make sure the fifo is clean */
-	while (!kfifo_is_empty(&data->attn_fifo)) {
-		count = kfifo_get(&data->attn_fifo, &attn_data);
-		if (count)
-			kfree(attn_data.data);
+	if (irq) {
+		disable_irq(irq);
+		if (enable_wake && device_may_wakeup(rmi_dev->xport->dev)) {
+			retval = enable_irq_wake(irq);
+			if (retval)
+				dev_warn(&rmi_dev->dev,
+					 "Failed to enable irq for wake: %d\n",
+					 retval);
+		}
+	} else {
+		/* make sure the fifo is clean */
+		while (!kfifo_is_empty(&data->attn_fifo)) {
+			count = kfifo_get(&data->attn_fifo, &attn_data);
+			if (count)
+				kfree(attn_data.data);
+		}
 	}

 out:
@@ -981,6 +997,8 @@ static int rmi_driver_remove(struct device *dev)
 	irq_domain_remove(data->irqdomain);
 	data->irqdomain = NULL;

+	cancel_work_sync(&data->attn_work);
+
 	rmi_f34_remove_sysfs(rmi_dev);
 	rmi_free_function_list(rmi_dev);

@@ -1219,9 +1237,15 @@ static int rmi_driver_probe(struct device *dev)
 		}
 	}

-	retval = rmi_irq_init(rmi_dev);
-	if (retval < 0)
-		goto err_destroy_functions;
+	if (pdata->irq) {
+		retval = rmi_irq_init(rmi_dev);
+		if (retval < 0)
+			goto err_destroy_functions;
+	}
+
+	data->enabled = true;
+
+	INIT_WORK(&data->attn_work, attn_callback);

 	if (data->f01_container->dev.driver) {
 		/* Driver already bound, so enable ATTN now. */
diff --git a/drivers/iommu/iommu.c b/drivers/iommu/iommu.c
index f2c45b85b9fc..cfeb6b3cd758 100644
--- a/drivers/iommu/iommu.c
+++ b/drivers/iommu/iommu.c
@@ -7,6 +7,7 @@
 #define pr_fmt(fmt)    "iommu: " fmt

 #include <linux/device.h>
+#include <linux/dmi.h>
 #include <linux/dma-iommu.h>
 #include <linux/kernel.h>
 #include <linux/bits.h>
@@ -2863,6 +2864,27 @@ u32 iommu_sva_get_pasid(struct iommu_sva *handle)
 }
 EXPORT_SYMBOL_GPL(iommu_sva_get_pasid);

+#ifdef CONFIG_ARM64
+static int __init iommu_quirks(void)
+{
+	const char *vendor, *name;
+
+	vendor = dmi_get_system_info(DMI_SYS_VENDOR);
+	name = dmi_get_system_info(DMI_PRODUCT_NAME);
+
+	if (vendor &&
+	    (strncmp(vendor, "GIGABYTE", 8) == 0 && name &&
+	     (strncmp(name, "R120", 4) == 0 ||
+	      strncmp(name, "R270", 4) == 0))) {
+		pr_warn("Gigabyte %s detected, force iommu passthrough mode", name);
+		iommu_def_domain_type = IOMMU_DOMAIN_IDENTITY;
+	}
+
+	return 0;
+}
+arch_initcall(iommu_quirks);
+#endif
+
 /*
  * Changes the default domain of an iommu group that has *only* one device
  *
diff --git a/drivers/message/fusion/mptsas.c b/drivers/message/fusion/mptsas.c
index 34901bcd1ce8..24194dbc2784 100644
--- a/drivers/message/fusion/mptsas.c
+++ b/drivers/message/fusion/mptsas.c
@@ -5320,6 +5320,11 @@ mptsas_probe(struct pci_dev *pdev, const struct pci_device_id *id)
 		    ioc, MPI_SAS_OP_CLEAR_ALL_PERSISTENT);
 	}

+#ifdef CONFIG_RHEL_DIFFERENCES
+	add_taint(TAINT_SUPPORT_REMOVED, LOCKDEP_STILL_OK);
+	pr_warn("MPTSAS MODULE IS NOT SUPPORTED\n");
+#endif
+
 	error = scsi_add_host(sh, &ioc->pcidev->dev);
 	if (error) {
 		dprintk(ioc, printk(MYIOC_s_ERR_FMT
@@ -5383,6 +5388,10 @@ static void mptsas_remove(struct pci_dev *pdev)
 }

 static struct pci_device_id mptsas_pci_table[] = {
+#ifdef CONFIG_RHEL_DIFFERENCES
+	{ PCI_VENDOR_ID_LSI_LOGIC, MPI_MANUFACTPAGE_DEVID_SAS1068,
+		PCI_VENDOR_ID_VMWARE, PCI_ANY_ID },
+#else
 	{ PCI_VENDOR_ID_LSI_LOGIC, MPI_MANUFACTPAGE_DEVID_SAS1064,
 		PCI_ANY_ID, PCI_ANY_ID },
 	{ PCI_VENDOR_ID_LSI_LOGIC, MPI_MANUFACTPAGE_DEVID_SAS1068,
@@ -5395,6 +5404,7 @@ static struct pci_device_id mptsas_pci_table[] = {
 		PCI_ANY_ID, PCI_ANY_ID },
 	{ PCI_VENDOR_ID_LSI_LOGIC, MPI_MANUFACTPAGE_DEVID_SAS1068_820XELP,
 		PCI_ANY_ID, PCI_ANY_ID },
+#endif
 	{0}	/* Terminating entry */
 };
 MODULE_DEVICE_TABLE(pci, mptsas_pci_table);
diff --git a/drivers/message/fusion/mptspi.c b/drivers/message/fusion/mptspi.c
index 388675cc1765..8c7d0740efb6 100644
--- a/drivers/message/fusion/mptspi.c
+++ b/drivers/message/fusion/mptspi.c
@@ -1238,12 +1238,17 @@ static struct spi_function_template mptspi_transport_functions = {
  */

 static struct pci_device_id mptspi_pci_table[] = {
+#ifdef CONFIG_RHEL_DIFFERENCES
+	{ PCI_VENDOR_ID_LSI_LOGIC, MPI_MANUFACTPAGE_DEVID_53C1030,
+	PCI_VENDOR_ID_VMWARE, PCI_ANY_ID },
+#else
 	{ PCI_VENDOR_ID_LSI_LOGIC, MPI_MANUFACTPAGE_DEVID_53C1030,
 		PCI_ANY_ID, PCI_ANY_ID },
 	{ PCI_VENDOR_ID_ATTO, MPI_MANUFACTPAGE_DEVID_53C1030,
 		PCI_ANY_ID, PCI_ANY_ID },
 	{ PCI_VENDOR_ID_LSI_LOGIC, MPI_MANUFACTPAGE_DEVID_53C1035,
 		PCI_ANY_ID, PCI_ANY_ID },
+#endif
 	{0}	/* Terminating entry */
 };
 MODULE_DEVICE_TABLE(pci, mptspi_pci_table);
@@ -1534,6 +1539,12 @@ mptspi_probe(struct pci_dev *pdev, const struct pci_device_id *id)
 		    0, 0, 0, 0, 5);

 	scsi_scan_host(sh);
+
+#ifdef CONFIG_RHEL_DIFFERENCES
+	add_taint(TAINT_SUPPORT_REMOVED, LOCKDEP_STILL_OK);
+	pr_warn("MPTSPI MODULE IS NOT SUPPORTED\n");
+#endif
+
 	return 0;

 out_mptspi_probe:
diff --git a/drivers/net/ethernet/intel/e1000/e1000_main.c b/drivers/net/ethernet/intel/e1000/e1000_main.c
index 3f5feb55cfba..9d8cb34845b3 100644
--- a/drivers/net/ethernet/intel/e1000/e1000_main.c
+++ b/drivers/net/ethernet/intel/e1000/e1000_main.c
@@ -933,6 +933,8 @@ static int e1000_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
 	int bars, need_ioport;
 	bool disable_dev = false;

+	pci_hw_unmaintained(e1000_pci_tbl, pdev);
+
 	/* do not allocate ioport bars when not needed */
 	need_ioport = e1000_is_need_ioport(pdev);
 	if (need_ioport) {
diff --git a/drivers/net/team/team.c b/drivers/net/team/team.c
index b07dde6f0abf..abcb1cb9a11f 100644
--- a/drivers/net/team/team.c
+++ b/drivers/net/team/team.c
@@ -3050,6 +3050,8 @@ static int __init team_module_init(void)
 	if (err)
 		goto err_nl_init;

+	mark_driver_deprecated(DRV_NAME);
+
 	return 0;

 err_nl_init:
diff --git a/drivers/net/wireguard/main.c b/drivers/net/wireguard/main.c
index ee4da9ab8013..0f217997a764 100644
--- a/drivers/net/wireguard/main.c
+++ b/drivers/net/wireguard/main.c
@@ -12,6 +12,7 @@

 #include <uapi/linux/wireguard.h>

+#include <linux/fips.h>
 #include <linux/init.h>
 #include <linux/module.h>
 #include <linux/genetlink.h>
@@ -21,6 +22,11 @@ static int __init wg_mod_init(void)
 {
 	int ret;

+#ifdef CONFIG_RHEL_DIFFERENCES
+	if (fips_enabled)
+		return -EOPNOTSUPP;
+#endif
+
 	ret = wg_allowedips_slab_init();
 	if (ret < 0)
 		goto err_allowedips;
@@ -48,6 +54,7 @@ static int __init wg_mod_init(void)
 	pr_info("WireGuard " WIREGUARD_VERSION " loaded. See www.wireguard.com for information.\n");
 	pr_info("Copyright (C) 2015-2019 Jason A. Donenfeld <Jason@zx2c4.com>. All Rights Reserved.\n");

+	mark_tech_preview("WireGuard", THIS_MODULE);
 	return 0;

 err_netlink:
diff --git a/drivers/nvme/host/core.c b/drivers/nvme/host/core.c
index 677fa4bf76d3..71d5d773d3d8 100644
--- a/drivers/nvme/host/core.c
+++ b/drivers/nvme/host/core.c
@@ -240,6 +240,9 @@ static void nvme_delete_ctrl_sync(struct nvme_ctrl *ctrl)

 static blk_status_t nvme_error_status(u16 status)
 {
+	if (unlikely(status & NVME_SC_DNR))
+		return BLK_STS_TARGET;
+
 	switch (status & 0x7ff) {
 	case NVME_SC_SUCCESS:
 		return BLK_STS_OK;
@@ -330,6 +333,7 @@ enum nvme_disposition {
 	COMPLETE,
 	RETRY,
 	FAILOVER,
+	FAILUP,
 };

 static inline enum nvme_disposition nvme_decide_disposition(struct request *req)
@@ -337,15 +341,16 @@ static inline enum nvme_disposition nvme_decide_disposition(struct request *req)
 	if (likely(nvme_req(req)->status == 0))
 		return COMPLETE;

-	if (blk_noretry_request(req) ||
+	if ((req->cmd_flags & (REQ_FAILFAST_DEV | REQ_FAILFAST_DRIVER)) ||
 	    (nvme_req(req)->status & NVME_SC_DNR) ||
 	    nvme_req(req)->retries >= nvme_max_retries)
 		return COMPLETE;

-	if (req->cmd_flags & REQ_NVME_MPATH) {
+	if (req->cmd_flags & (REQ_NVME_MPATH | REQ_FAILFAST_TRANSPORT)) {
 		if (nvme_is_path_error(nvme_req(req)->status) ||
 		    blk_queue_dying(req->q))
-			return FAILOVER;
+			return (req->cmd_flags & REQ_NVME_MPATH) ?
+				FAILOVER : FAILUP;
 	} else {
 		if (blk_queue_dying(req->q))
 			return COMPLETE;
@@ -373,6 +378,14 @@ static inline void nvme_end_req(struct request *req)
 	blk_mq_end_request(req, status);
 }

+static inline void nvme_failup_req(struct request *req)
+{
+	nvme_update_ana(req);
+
+	nvme_req(req)->status = NVME_SC_HOST_PATH_ERROR;
+	nvme_end_req(req);
+}
+
 void nvme_complete_rq(struct request *req)
 {
 	trace_nvme_complete_rq(req);
@@ -391,6 +404,9 @@ void nvme_complete_rq(struct request *req)
 	case FAILOVER:
 		nvme_failover_req(req);
 		return;
+	case FAILUP:
+		nvme_failup_req(req);
+		return;
 	}
 }
 EXPORT_SYMBOL_GPL(nvme_complete_rq);
diff --git a/drivers/nvme/host/multipath.c b/drivers/nvme/host/multipath.c
index 1b31f19e1053..4ffdabb4f223 100644
--- a/drivers/nvme/host/multipath.c
+++ b/drivers/nvme/host/multipath.c
@@ -80,14 +80,10 @@ void nvme_mpath_start_freeze(struct nvme_subsystem *subsys)
 			blk_freeze_queue_start(h->disk->queue);
 }

-void nvme_failover_req(struct request *req)
+void nvme_update_ana(struct request *req)
 {
 	struct nvme_ns *ns = req->q->queuedata;
 	u16 status = nvme_req(req)->status & 0x7ff;
-	unsigned long flags;
-	struct bio *bio;
-
-	nvme_mpath_clear_current_path(ns);

 	/*
 	 * If we got back an ANA error, we know the controller is alive but not
@@ -98,6 +94,16 @@ void nvme_failover_req(struct request *req)
 		set_bit(NVME_NS_ANA_PENDING, &ns->flags);
 		queue_work(nvme_wq, &ns->ctrl->ana_work);
 	}
+}
+
+void nvme_failover_req(struct request *req)
+{
+	struct nvme_ns *ns = req->q->queuedata;
+	unsigned long flags;
+	struct bio *bio;
+
+	nvme_mpath_clear_current_path(ns);
+	nvme_update_ana(req);

 	spin_lock_irqsave(&ns->head->requeue_lock, flags);
 	for (bio = req->bio; bio; bio = bio->bi_next) {
@@ -847,8 +853,7 @@ int nvme_mpath_init_identify(struct nvme_ctrl *ctrl, struct nvme_id_ctrl *id)
 	int error = 0;

 	/* check if multipath is enabled and we have the capability */
-	if (!multipath || !ctrl->subsys ||
-	    !(ctrl->subsys->cmic & NVME_CTRL_CMIC_ANA))
+	if (!ctrl->subsys || !(ctrl->subsys->cmic & NVME_CTRL_CMIC_ANA))
 		return 0;

 	if (!ctrl->max_namespaces ||
diff --git a/drivers/nvme/host/nvme.h b/drivers/nvme/host/nvme.h
index f4b674a8ce20..181cbac05cef 100644
--- a/drivers/nvme/host/nvme.h
+++ b/drivers/nvme/host/nvme.h
@@ -776,6 +776,7 @@ void nvme_mpath_wait_freeze(struct nvme_subsystem *subsys);
 void nvme_mpath_start_freeze(struct nvme_subsystem *subsys);
 void nvme_mpath_default_iopolicy(struct nvme_subsystem *subsys);
 void nvme_failover_req(struct request *req);
+void nvme_update_ana(struct request *req);
 void nvme_kick_requeue_lists(struct nvme_ctrl *ctrl);
 int nvme_mpath_alloc_disk(struct nvme_ctrl *ctrl,struct nvme_ns_head *head);
 void nvme_mpath_add_disk(struct nvme_ns *ns, struct nvme_id_ns *id);
@@ -811,6 +812,9 @@ static inline bool nvme_ctrl_use_ana(struct nvme_ctrl *ctrl)
 static inline void nvme_failover_req(struct request *req)
 {
 }
+static inline void nvme_update_ana(struct request *req)
+{
+}
 static inline void nvme_kick_requeue_lists(struct nvme_ctrl *ctrl)
 {
 }
diff --git a/drivers/pci/pci-driver.c b/drivers/pci/pci-driver.c
index 4ceeb75fc899..be23656279ff 100644
--- a/drivers/pci/pci-driver.c
+++ b/drivers/pci/pci-driver.c
@@ -19,6 +19,7 @@
 #include <linux/kexec.h>
 #include <linux/of_device.h>
 #include <linux/acpi.h>
+#include <linux/kernel.h>
 #include <linux/dma-map-ops.h>
 #include "pci.h"
 #include "pcie/portdrv.h"
@@ -295,6 +296,83 @@ static struct attribute *pci_drv_attrs[] = {
 };
 ATTRIBUTE_GROUPS(pci_drv);

+#ifdef CONFIG_RHEL_DIFFERENCES
+/**
+ * pci_hw_deprecated - Tell if a PCI device is deprecated
+ * @ids: array of PCI device id structures to search in
+ * @dev: the PCI device structure to match against
+ *
+ * Used by a driver to check whether this device is in its list of deprecated
+ * devices.  Returns the matching pci_device_id structure or %NULL if there is
+ * no match.
+ *
+ * Reserved for Internal Red Hat use only.
+ */
+const struct pci_device_id *pci_hw_deprecated(const struct pci_device_id *ids,
+					      struct pci_dev *dev)
+{
+	const struct pci_device_id *ret = pci_match_id(ids, dev);
+
+	if (!ret)
+		return NULL;
+
+	mark_hardware_deprecated(dev_driver_string(&dev->dev), "%04X:%04X @ %s",
+				 dev->device, dev->vendor, pci_name(dev));
+	return ret;
+}
+EXPORT_SYMBOL(pci_hw_deprecated);
+
+/**
+ * pci_hw_unmaintained - Tell if a PCI device is unmaintained
+ * @ids: array of PCI device id structures to search in
+ * @dev: the PCI device structure to match against
+ *
+ * Used by a driver to check whether this device is in its list of unmaintained
+ * devices.  Returns the matching pci_device_id structure or %NULL if there is
+ * no match.
+ *
+ * Reserved for Internal Red Hat use only.
+ */
+const struct pci_device_id *pci_hw_unmaintained(const struct pci_device_id *ids,
+						struct pci_dev *dev)
+{
+	const struct pci_device_id *ret = pci_match_id(ids, dev);
+
+	if (!ret)
+		return NULL;
+
+	mark_hardware_unmaintained(dev_driver_string(&dev->dev), "%04X:%04X @ %s",
+				   dev->device, dev->vendor, pci_name(dev));
+	return ret;
+}
+EXPORT_SYMBOL(pci_hw_unmaintained);
+
+/**
+ * pci_hw_disabled - Tell if a PCI device is disabled
+ * @ids: array of PCI device id structures to search in
+ * @dev: the PCI device structure to match against
+ *
+ * Used by a driver to check whether this device is in its list of disabled
+ * devices.  Returns the matching pci_device_id structure or %NULL if there is
+ * no match.
+ *
+ * Reserved for Internal Red Hat use only.
+ */
+const struct pci_device_id *pci_hw_disabled(const struct pci_device_id *ids,
+					    struct pci_dev *dev)
+{
+	const struct pci_device_id *ret = pci_match_id(ids, dev);
+
+	if (!ret)
+		return NULL;
+
+	mark_hardware_disabled(dev_driver_string(&dev->dev), "%04X:%04X @ %s",
+				   dev->device, dev->vendor, pci_name(dev));
+	return ret;
+}
+EXPORT_SYMBOL(pci_hw_disabled);
+#endif
+
 struct drv_dev_and_id {
 	struct pci_driver *drv;
 	struct pci_dev *dev;
diff --git a/drivers/pci/quirks.c b/drivers/pci/quirks.c
index da829274fc66..bb6e79ec3d00 100644
--- a/drivers/pci/quirks.c
+++ b/drivers/pci/quirks.c
@@ -4284,6 +4284,30 @@ DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_BROADCOM, 0x9000,
 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_BROADCOM, 0x9084,
 				quirk_bridge_cavm_thrx2_pcie_root);

+/*
+ * PCI BAR 5 is not setup correctly for the on-board AHCI controller
+ * on Broadcom's Vulcan processor. Added a quirk to fix BAR 5 by
+ * using BAR 4's resources which are populated correctly and NOT
+ * actually used by the AHCI controller.
+ */
+static void quirk_fix_vulcan_ahci_bars(struct pci_dev *dev)
+{
+	struct resource *r =  &dev->resource[4];
+
+	if (!(r->flags & IORESOURCE_MEM) || (r->start == 0))
+		return;
+
+	/* Set BAR5 resource to BAR4 */
+	dev->resource[5] = *r;
+
+	/* Update BAR5 in pci config space */
+	pci_write_config_dword(dev, PCI_BASE_ADDRESS_5, r->start);
+
+	/* Clear BAR4's resource */
+	memset(r, 0, sizeof(*r));
+}
+DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_BROADCOM, 0x9027, quirk_fix_vulcan_ahci_bars);
+
 /*
  * Intersil/Techwell TW686[4589]-based video capture cards have an empty (zero)
  * class code.  Fix it.
diff --git a/drivers/scsi/aacraid/linit.c b/drivers/scsi/aacraid/linit.c
index 9c27bc37e5de..8179eac8a7c3 100644
--- a/drivers/scsi/aacraid/linit.c
+++ b/drivers/scsi/aacraid/linit.c
@@ -78,6 +78,7 @@ char aac_driver_version[] = AAC_DRIVER_FULL_VERSION;
  * Note: The last field is used to index into aac_drivers below.
  */
 static const struct pci_device_id aac_pci_tbl[] = {
+#ifndef CONFIG_RHEL_DIFFERENCES
 	{ 0x1028, 0x0001, 0x1028, 0x0001, 0, 0, 0 }, /* PERC 2/Si (Iguana/PERC2Si) */
 	{ 0x1028, 0x0002, 0x1028, 0x0002, 0, 0, 1 }, /* PERC 3/Di (Opal/PERC3Di) */
 	{ 0x1028, 0x0003, 0x1028, 0x0003, 0, 0, 2 }, /* PERC 3/Si (SlimFast/PERC3Si */
@@ -145,6 +146,7 @@ static const struct pci_device_id aac_pci_tbl[] = {
 	{ 0x9005, 0x0285, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 59 }, /* Adaptec Catch All */
 	{ 0x9005, 0x0286, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 60 }, /* Adaptec Rocket Catch All */
 	{ 0x9005, 0x0288, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 61 }, /* Adaptec NEMER/ARK Catch All */
+#endif
 	{ 0x9005, 0x028b, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 62 }, /* Adaptec PMC Series 6 (Tupelo) */
 	{ 0x9005, 0x028c, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 63 }, /* Adaptec PMC Series 7 (Denali) */
 	{ 0x9005, 0x028d, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 64 }, /* Adaptec PMC Series 8 */
diff --git a/drivers/scsi/be2iscsi/be_main.c b/drivers/scsi/be2iscsi/be_main.c
index 3bb0adefbe06..b5408ba70ecb 100644
--- a/drivers/scsi/be2iscsi/be_main.c
+++ b/drivers/scsi/be2iscsi/be_main.c
@@ -372,11 +372,13 @@ static int beiscsi_eh_device_reset(struct scsi_cmnd *sc)

 /*------------------- PCI Driver operations and data ----------------- */
 static const struct pci_device_id beiscsi_pci_id_table[] = {
+#ifndef CONFIG_RHEL_DIFFERENCES
 	{ PCI_DEVICE(BE_VENDOR_ID, BE_DEVICE_ID1) },
 	{ PCI_DEVICE(BE_VENDOR_ID, BE_DEVICE_ID2) },
 	{ PCI_DEVICE(BE_VENDOR_ID, OC_DEVICE_ID1) },
 	{ PCI_DEVICE(BE_VENDOR_ID, OC_DEVICE_ID2) },
 	{ PCI_DEVICE(BE_VENDOR_ID, OC_DEVICE_ID3) },
+#endif
 	{ PCI_DEVICE(ELX_VENDOR_ID, OC_SKH_ID1) },
 	{ 0 }
 };
diff --git a/drivers/scsi/hpsa.c b/drivers/scsi/hpsa.c
index a47bcce3c9c7..094944a52866 100644
--- a/drivers/scsi/hpsa.c
+++ b/drivers/scsi/hpsa.c
@@ -82,7 +82,9 @@ MODULE_DESCRIPTION("Driver for HP Smart Array Controller version " \
 	HPSA_DRIVER_VERSION);
 MODULE_VERSION(HPSA_DRIVER_VERSION);
 MODULE_LICENSE("GPL");
+#ifndef CONFIG_RHEL_DIFFERENCES
 MODULE_ALIAS("cciss");
+#endif

 static int hpsa_simple_mode;
 module_param(hpsa_simple_mode, int, S_IRUGO|S_IWUSR);
@@ -144,10 +146,12 @@ static const struct pci_device_id hpsa_pci_device_id[] = {
 	{PCI_VENDOR_ID_HP_3PAR, 0x0075, 0x1590, 0x007D},
 	{PCI_VENDOR_ID_HP_3PAR, 0x0075, 0x1590, 0x0088},
 	{PCI_VENDOR_ID_HP, 0x333f, 0x103c, 0x333f},
+#ifndef CONFIG_RHEL_DIFFERENCES
 	{PCI_VENDOR_ID_HP,     PCI_ANY_ID,	PCI_ANY_ID, PCI_ANY_ID,
 		PCI_CLASS_STORAGE_RAID << 8, 0xffff << 8, 0},
 	{PCI_VENDOR_ID_COMPAQ,     PCI_ANY_ID,	PCI_ANY_ID, PCI_ANY_ID,
 		PCI_CLASS_STORAGE_RAID << 8, 0xffff << 8, 0},
+#endif
 	{0,}
 };

diff --git a/drivers/scsi/lpfc/lpfc_ids.h b/drivers/scsi/lpfc/lpfc_ids.h
index 6a90e6e53d09..7e48c3bf701d 100644
--- a/drivers/scsi/lpfc/lpfc_ids.h
+++ b/drivers/scsi/lpfc/lpfc_ids.h
@@ -24,6 +24,7 @@
 #include <linux/pci.h>

 const struct pci_device_id lpfc_id_table[] = {
+#ifndef CONFIG_RHEL_DIFFERENCES
 	{PCI_VENDOR_ID_EMULEX, PCI_DEVICE_ID_VIPER,
 		PCI_ANY_ID, PCI_ANY_ID, },
 	{PCI_VENDOR_ID_EMULEX, PCI_DEVICE_ID_FIREFLY,
@@ -54,14 +55,19 @@ const struct pci_device_id lpfc_id_table[] = {
 		PCI_ANY_ID, PCI_ANY_ID, },
 	{PCI_VENDOR_ID_EMULEX, PCI_DEVICE_ID_HELIOS_DCSP,
 		PCI_ANY_ID, PCI_ANY_ID, },
+#endif
 	{PCI_VENDOR_ID_EMULEX, PCI_DEVICE_ID_BMID,
 		PCI_ANY_ID, PCI_ANY_ID, },
+#ifndef CONFIG_RHEL_DIFFERENCES
 	{PCI_VENDOR_ID_EMULEX, PCI_DEVICE_ID_BSMB,
 		PCI_ANY_ID, PCI_ANY_ID, },
+#endif
 	{PCI_VENDOR_ID_EMULEX, PCI_DEVICE_ID_ZEPHYR,
 		PCI_ANY_ID, PCI_ANY_ID, },
+#ifndef CONFIG_RHEL_DIFFERENCES
 	{PCI_VENDOR_ID_EMULEX, PCI_DEVICE_ID_HORNET,
 		PCI_ANY_ID, PCI_ANY_ID, },
+#endif
 	{PCI_VENDOR_ID_EMULEX, PCI_DEVICE_ID_ZEPHYR_SCSP,
 		PCI_ANY_ID, PCI_ANY_ID, },
 	{PCI_VENDOR_ID_EMULEX, PCI_DEVICE_ID_ZEPHYR_DCSP,
@@ -70,6 +76,7 @@ const struct pci_device_id lpfc_id_table[] = {
 		PCI_ANY_ID, PCI_ANY_ID, },
 	{PCI_VENDOR_ID_EMULEX, PCI_DEVICE_ID_ZSMB,
 		PCI_ANY_ID, PCI_ANY_ID, },
+#ifndef CONFIG_RHEL_DIFFERENCES
 	{PCI_VENDOR_ID_EMULEX, PCI_DEVICE_ID_TFLY,
 		PCI_ANY_ID, PCI_ANY_ID, },
 	{PCI_VENDOR_ID_EMULEX, PCI_DEVICE_ID_LP101,
@@ -80,6 +87,7 @@ const struct pci_device_id lpfc_id_table[] = {
 		PCI_ANY_ID, PCI_ANY_ID, },
 	{PCI_VENDOR_ID_EMULEX, PCI_DEVICE_ID_LPE11000S,
 		PCI_ANY_ID, PCI_ANY_ID, },
+#endif
 	{PCI_VENDOR_ID_EMULEX, PCI_DEVICE_ID_SAT,
 		PCI_ANY_ID, PCI_ANY_ID, },
 	{PCI_VENDOR_ID_EMULEX, PCI_DEVICE_ID_SAT_MID,
@@ -92,6 +100,7 @@ const struct pci_device_id lpfc_id_table[] = {
 		PCI_ANY_ID, PCI_ANY_ID, },
 	{PCI_VENDOR_ID_EMULEX, PCI_DEVICE_ID_SAT_S,
 		PCI_ANY_ID, PCI_ANY_ID, },
+#ifndef CONFIG_RHEL_DIFFERENCES
 	{PCI_VENDOR_ID_EMULEX, PCI_DEVICE_ID_PROTEUS_VF,
 		PCI_ANY_ID, PCI_ANY_ID, },
 	{PCI_VENDOR_ID_EMULEX, PCI_DEVICE_ID_PROTEUS_PF,
@@ -102,18 +111,23 @@ const struct pci_device_id lpfc_id_table[] = {
 		PCI_ANY_ID, PCI_ANY_ID, },
 	{PCI_VENDOR_ID_SERVERENGINE, PCI_DEVICE_ID_TOMCAT,
 		PCI_ANY_ID, PCI_ANY_ID, },
+#endif
 	{PCI_VENDOR_ID_EMULEX, PCI_DEVICE_ID_FALCON,
 		PCI_ANY_ID, PCI_ANY_ID, },
+#ifndef CONFIG_RHEL_DIFFERENCES
 	{PCI_VENDOR_ID_EMULEX, PCI_DEVICE_ID_BALIUS,
 		PCI_ANY_ID, PCI_ANY_ID, },
+#endif
 	{PCI_VENDOR_ID_EMULEX, PCI_DEVICE_ID_LANCER_FC,
 		PCI_ANY_ID, PCI_ANY_ID, },
+#ifndef CONFIG_RHEL_DIFFERENCES
 	{PCI_VENDOR_ID_EMULEX, PCI_DEVICE_ID_LANCER_FCOE,
 		PCI_ANY_ID, PCI_ANY_ID, },
 	{PCI_VENDOR_ID_EMULEX, PCI_DEVICE_ID_LANCER_FC_VF,
 		PCI_ANY_ID, PCI_ANY_ID, },
 	{PCI_VENDOR_ID_EMULEX, PCI_DEVICE_ID_LANCER_FCOE_VF,
 		PCI_ANY_ID, PCI_ANY_ID, },
+#endif
 	{PCI_VENDOR_ID_EMULEX, PCI_DEVICE_ID_LANCER_G6_FC,
 		PCI_ANY_ID, PCI_ANY_ID, },
 	{PCI_VENDOR_ID_EMULEX, PCI_DEVICE_ID_LANCER_G7_FC,
diff --git a/drivers/scsi/megaraid/megaraid_sas_base.c b/drivers/scsi/megaraid/megaraid_sas_base.c
index 8bf72dbc33b7..d76794bfa0e0 100644
--- a/drivers/scsi/megaraid/megaraid_sas_base.c
+++ b/drivers/scsi/megaraid/megaraid_sas_base.c
@@ -149,6 +149,7 @@ megasas_set_ld_removed_by_fw(struct megasas_instance *instance);
  */
 static struct pci_device_id megasas_pci_table[] = {

+#ifndef CONFIG_RHEL_DIFFERENCES
 	{PCI_DEVICE(PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_LSI_SAS1064R)},
 	/* xscale IOP */
 	{PCI_DEVICE(PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_LSI_SAS1078R)},
@@ -157,16 +158,19 @@ static struct pci_device_id megasas_pci_table[] = {
 	/* ppc IOP */
 	{PCI_DEVICE(PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_LSI_SAS1078GEN2)},
 	/* gen2*/
+#endif
 	{PCI_DEVICE(PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_LSI_SAS0079GEN2)},
 	/* gen2*/
 	{PCI_DEVICE(PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_LSI_SAS0073SKINNY)},
 	/* skinny*/
 	{PCI_DEVICE(PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_LSI_SAS0071SKINNY)},
 	/* skinny*/
+#ifndef CONFIG_RHEL_DIFFERENCES
 	{PCI_DEVICE(PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_LSI_VERDE_ZCR)},
 	/* xscale IOP, vega */
 	{PCI_DEVICE(PCI_VENDOR_ID_DELL, PCI_DEVICE_ID_DELL_PERC5)},
 	/* xscale IOP */
+#endif
 	{PCI_DEVICE(PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_LSI_FUSION)},
 	/* Fusion */
 	{PCI_DEVICE(PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_LSI_PLASMA)},
diff --git a/drivers/scsi/mpt3sas/mpt3sas_scsih.c b/drivers/scsi/mpt3sas/mpt3sas_scsih.c
index 00792767c620..2ee890521ed7 100644
--- a/drivers/scsi/mpt3sas/mpt3sas_scsih.c
+++ b/drivers/scsi/mpt3sas/mpt3sas_scsih.c
@@ -12605,6 +12605,7 @@ bool scsih_ncq_prio_supp(struct scsi_device *sdev)
  * The pci device ids are defined in mpi/mpi2_cnfg.h.
  */
 static const struct pci_device_id mpt3sas_pci_table[] = {
+#ifndef CONFIG_RHEL_DIFFERENCES
 	/* Spitfire ~ 2004 */
 	{ MPI2_MFGPAGE_VENDORID_LSI, MPI2_MFGPAGE_DEVID_SAS2004,
 		PCI_ANY_ID, PCI_ANY_ID },
@@ -12623,6 +12624,7 @@ static const struct pci_device_id mpt3sas_pci_table[] = {
 		PCI_ANY_ID, PCI_ANY_ID },
 	{ MPI2_MFGPAGE_VENDORID_LSI, MPI2_MFGPAGE_DEVID_SAS2116_2,
 		PCI_ANY_ID, PCI_ANY_ID },
+#endif
 	/* Thunderbolt ~ 2208 */
 	{ MPI2_MFGPAGE_VENDORID_LSI, MPI2_MFGPAGE_DEVID_SAS2208_1,
 		PCI_ANY_ID, PCI_ANY_ID },
@@ -12647,9 +12649,11 @@ static const struct pci_device_id mpt3sas_pci_table[] = {
 		PCI_ANY_ID, PCI_ANY_ID },
 	{ MPI2_MFGPAGE_VENDORID_LSI, MPI2_MFGPAGE_DEVID_SWITCH_MPI_EP_1,
 		PCI_ANY_ID, PCI_ANY_ID },
+#ifndef CONFIG_RHEL_DIFFERENCES
 	/* SSS6200 */
 	{ MPI2_MFGPAGE_VENDORID_LSI, MPI2_MFGPAGE_DEVID_SSS6200,
 		PCI_ANY_ID, PCI_ANY_ID },
+#endif
 	/* Fury ~ 3004 and 3008 */
 	{ MPI2_MFGPAGE_VENDORID_LSI, MPI25_MFGPAGE_DEVID_SAS3004,
 		PCI_ANY_ID, PCI_ANY_ID },
diff --git a/drivers/scsi/qla2xxx/qla_os.c b/drivers/scsi/qla2xxx/qla_os.c
index 762229d495a8..1567434af08b 100644
--- a/drivers/scsi/qla2xxx/qla_os.c
+++ b/drivers/scsi/qla2xxx/qla_os.c
@@ -7974,6 +7974,7 @@ static const struct pci_error_handlers qla2xxx_err_handler = {
 };

 static struct pci_device_id qla2xxx_pci_tbl[] = {
+#ifndef CONFIG_RHEL_DIFFERENCES
 	{ PCI_DEVICE(PCI_VENDOR_ID_QLOGIC, PCI_DEVICE_ID_QLOGIC_ISP2100) },
 	{ PCI_DEVICE(PCI_VENDOR_ID_QLOGIC, PCI_DEVICE_ID_QLOGIC_ISP2200) },
 	{ PCI_DEVICE(PCI_VENDOR_ID_QLOGIC, PCI_DEVICE_ID_QLOGIC_ISP2300) },
@@ -7986,13 +7987,18 @@ static struct pci_device_id qla2xxx_pci_tbl[] = {
 	{ PCI_DEVICE(PCI_VENDOR_ID_QLOGIC, PCI_DEVICE_ID_QLOGIC_ISP8432) },
 	{ PCI_DEVICE(PCI_VENDOR_ID_QLOGIC, PCI_DEVICE_ID_QLOGIC_ISP5422) },
 	{ PCI_DEVICE(PCI_VENDOR_ID_QLOGIC, PCI_DEVICE_ID_QLOGIC_ISP5432) },
+#endif
 	{ PCI_DEVICE(PCI_VENDOR_ID_QLOGIC, PCI_DEVICE_ID_QLOGIC_ISP2532) },
 	{ PCI_DEVICE(PCI_VENDOR_ID_QLOGIC, PCI_DEVICE_ID_QLOGIC_ISP2031) },
+#ifndef CONFIG_RHEL_DIFFERENCES
 	{ PCI_DEVICE(PCI_VENDOR_ID_QLOGIC, PCI_DEVICE_ID_QLOGIC_ISP8001) },
 	{ PCI_DEVICE(PCI_VENDOR_ID_QLOGIC, PCI_DEVICE_ID_QLOGIC_ISP8021) },
+#endif
 	{ PCI_DEVICE(PCI_VENDOR_ID_QLOGIC, PCI_DEVICE_ID_QLOGIC_ISP8031) },
+#ifndef CONFIG_RHEL_DIFFERENCES
 	{ PCI_DEVICE(PCI_VENDOR_ID_QLOGIC, PCI_DEVICE_ID_QLOGIC_ISPF001) },
 	{ PCI_DEVICE(PCI_VENDOR_ID_QLOGIC, PCI_DEVICE_ID_QLOGIC_ISP8044) },
+#endif
 	{ PCI_DEVICE(PCI_VENDOR_ID_QLOGIC, PCI_DEVICE_ID_QLOGIC_ISP2071) },
 	{ PCI_DEVICE(PCI_VENDOR_ID_QLOGIC, PCI_DEVICE_ID_QLOGIC_ISP2271) },
 	{ PCI_DEVICE(PCI_VENDOR_ID_QLOGIC, PCI_DEVICE_ID_QLOGIC_ISP2261) },
diff --git a/drivers/scsi/qla4xxx/ql4_os.c b/drivers/scsi/qla4xxx/ql4_os.c
index 3f6cb2a5c2c2..68768100a1ac 100644
--- a/drivers/scsi/qla4xxx/ql4_os.c
+++ b/drivers/scsi/qla4xxx/ql4_os.c
@@ -9855,6 +9855,7 @@ static struct pci_device_id qla4xxx_pci_tbl[] = {
 		.subvendor	= PCI_ANY_ID,
 		.subdevice	= PCI_ANY_ID,
 	},
+#ifndef CONFIG_RHEL_DIFFERENCES
 	{
 		.vendor         = PCI_VENDOR_ID_QLOGIC,
 		.device         = PCI_DEVICE_ID_QLOGIC_ISP8022,
@@ -9873,6 +9874,7 @@ static struct pci_device_id qla4xxx_pci_tbl[] = {
 		.subvendor	= PCI_ANY_ID,
 		.subdevice	= PCI_ANY_ID,
 	},
+#endif
 	{0, 0},
 };
 MODULE_DEVICE_TABLE(pci, qla4xxx_pci_tbl);
diff --git a/drivers/usb/core/hub.c b/drivers/usb/core/hub.c
index 1460857026e0..7e1964891089 100644
--- a/drivers/usb/core/hub.c
+++ b/drivers/usb/core/hub.c
@@ -5688,6 +5688,13 @@ static void hub_event(struct work_struct *work)
 			(u16) hub->change_bits[0],
 			(u16) hub->event_bits[0]);

+	/* Don't disconnect USB-SATA on TrimSlice */
+	if (strcmp(dev_name(hdev->bus->controller), "tegra-ehci.0") == 0) {
+		if ((hdev->state == 7) && (hub->change_bits[0] == 0) &&
+				(hub->event_bits[0] == 0x2))
+			hub->event_bits[0] = 0;
+	}
+
 	/* Lock the device, then check to see if we were
 	 * disconnected while waiting for the lock to succeed. */
 	usb_lock_device(hdev);
diff --git a/drivers/virtio/virtio_mem.c b/drivers/virtio/virtio_mem.c
index e7d6b679596d..e604370ed3c1 100644
--- a/drivers/virtio/virtio_mem.c
+++ b/drivers/virtio/virtio_mem.c
@@ -2789,6 +2789,19 @@ static int virtio_mem_probe(struct virtio_device *vdev)

 	/* trigger a config update to start processing the requested_size */
 	if (!vm->in_kdump) {
+#ifdef CONFIG_RHEL_DIFFERENCES
+		static bool printed;
+
+		/*
+		 * virtio-mem, and especially its memory hot(un)plug
+		 * functionality, is tech-preview.
+		 */
+		if (!printed) {
+			printed = true;
+			mark_tech_preview("virtio_mem", THIS_MODULE);
+		}
+#endif /* CONFIG_RHEL_DIFFERENCES */
+
 		atomic_set(&vm->config_changed, 1);
 		queue_work(system_freezable_wq, &vm->wq);
 	}
diff --git a/fs/ext4/super.c b/fs/ext4/super.c
index 81749eaddf4c..f5de0c0c14cd 100644
--- a/fs/ext4/super.c
+++ b/fs/ext4/super.c
@@ -4793,6 +4793,7 @@ static int __ext4_fill_super(struct fs_context *fc, struct super_block *sb)
 	}

 	if (sbi->s_mount_opt & EXT4_MOUNT_DAX_ALWAYS) {
+		static bool printed = false;
 		if (ext4_has_feature_inline_data(sb)) {
 			ext4_msg(sb, KERN_ERR, "Cannot use DAX on a filesystem"
 					" that may contain inline data");
@@ -4803,6 +4804,10 @@ static int __ext4_fill_super(struct fs_context *fc, struct super_block *sb)
 				"DAX unsupported by block device.");
 			goto failed_mount;
 		}
+		if (!printed) {
+			mark_tech_preview("ext4 direct access (dax)", NULL);
+			printed = true;
+		}
 	}

 	if (ext4_has_feature_encrypt(sb) && es->s_encryption_level) {
diff --git a/fs/xfs/xfs_super.c b/fs/xfs/xfs_super.c
index d84714e4e46a..689297b7b003 100644
--- a/fs/xfs/xfs_super.c
+++ b/fs/xfs/xfs_super.c
@@ -1602,9 +1602,14 @@ xfs_fs_fill_super(
 		sb->s_flags |= SB_I_VERSION;

 	if (xfs_has_dax_always(mp)) {
+		static bool printed = false;
 		error = xfs_setup_dax_always(mp);
 		if (error)
 			goto out_filestream_unmount;
+		if (!printed) {
+			mark_tech_preview("xfs direct access (dax)", NULL);
+			printed = true;
+		}
 	}

 	if (xfs_has_discard(mp)) {
diff --git a/include/linux/efi.h b/include/linux/efi.h
index ccd4d3f91c98..e64643e3e364 100644
--- a/include/linux/efi.h
+++ b/include/linux/efi.h
@@ -43,6 +43,8 @@
 #define EFI_ABORTED		(21 | (1UL << (BITS_PER_LONG-1)))
 #define EFI_SECURITY_VIOLATION	(26 | (1UL << (BITS_PER_LONG-1)))

+#define EFI_IS_ERROR(x)		((x) & (1UL << (BITS_PER_LONG-1)))
+
 typedef unsigned long efi_status_t;
 typedef u8 efi_bool_t;
 typedef u16 efi_char16_t;		/* UNICODE character */
@@ -829,6 +831,14 @@ extern int __init efi_setup_pcdp_console(char *);
 #define EFI_MEM_ATTR		10	/* Did firmware publish an EFI_MEMORY_ATTRIBUTES table? */
 #define EFI_MEM_NO_SOFT_RESERVE	11	/* Is the kernel configured to ignore soft reservations? */
 #define EFI_PRESERVE_BS_REGIONS	12	/* Are EFI boot-services memory segments available? */
+#define EFI_SECURE_BOOT		13	/* Are we in Secure Boot mode? */
+
+enum efi_secureboot_mode {
+	efi_secureboot_mode_unset,
+	efi_secureboot_mode_unknown,
+	efi_secureboot_mode_disabled,
+	efi_secureboot_mode_enabled,
+};

 #ifdef CONFIG_EFI
 /*
@@ -840,6 +850,8 @@ static inline bool efi_enabled(int feature)
 }
 extern void efi_reboot(enum reboot_mode reboot_mode, const char *__unused);

+extern void __init efi_set_secure_boot(enum efi_secureboot_mode mode);
+
 bool __pure __efi_soft_reserve_enabled(void);

 static inline bool __pure efi_soft_reserve_enabled(void)
@@ -860,6 +872,8 @@ static inline bool efi_enabled(int feature)
 static inline void
 efi_reboot(enum reboot_mode reboot_mode, const char *__unused) {}

+static inline void efi_set_secure_boot(enum efi_secureboot_mode mode) {}
+
 static inline bool efi_soft_reserve_enabled(void)
 {
 	return false;
@@ -872,6 +886,7 @@ static inline bool efi_rt_services_supported(unsigned int mask)
 #endif

 extern int efi_status_to_err(efi_status_t status);
+extern const char *efi_status_to_str(efi_status_t status);

 /*
  * Variable Attributes
@@ -1124,13 +1139,6 @@ static inline bool efi_runtime_disabled(void) { return true; }
 extern void efi_call_virt_check_flags(unsigned long flags, const char *call);
 extern unsigned long efi_call_virt_save_flags(void);

-enum efi_secureboot_mode {
-	efi_secureboot_mode_unset,
-	efi_secureboot_mode_unknown,
-	efi_secureboot_mode_disabled,
-	efi_secureboot_mode_enabled,
-};
-
 static inline
 enum efi_secureboot_mode efi_get_secureboot_mode(efi_get_variable_t *get_var)
 {
diff --git a/include/linux/kernel.h b/include/linux/kernel.h
index 08ba5995aa8b..5745b60e3b78 100644
--- a/include/linux/kernel.h
+++ b/include/linux/kernel.h
@@ -517,4 +517,23 @@ static inline void ftrace_dump(enum ftrace_dump_mode oops_dump_mode) { }
 	 /* OTHER_WRITABLE?  Generally considered a bad idea. */		\
 	 BUILD_BUG_ON_ZERO((perms) & 2) +					\
 	 (perms))
+
+struct module;
+
+#ifdef CONFIG_RHEL_DIFFERENCES
+void mark_hardware_unmaintained(const char *driver_name, char *fmt, ...);
+void mark_driver_unmaintained(const char *driver_name);
+void mark_hardware_deprecated(const char *driver_name, char *fmt, ...);
+void mark_driver_deprecated(const char *driver_name);
+void mark_hardware_disabled(const char *driver_name, char *fmt, ...);
+void mark_tech_preview(const char *msg, struct module *mod);
+#else
+static inline void mark_hardware_unsupported(const char *driver_name, char *fmt, ...) { }
+static inline void mark_driver_unmaintained(const char *driver_name) { }
+static inline void mark_hardware_deprecated(const char *driver_name, char *fmt, ...) { }
+static inline void mark_driver_deprecated(const char *driver_name) { }
+static inline void mark_hardware_disabled(const char *driver_name, char *fmt, ...) { }
+static inline void mark_tech_preview(const char *msg, struct module *mod) { }
+#endif
+
 #endif
diff --git a/include/linux/lsm_hook_defs.h b/include/linux/lsm_hook_defs.h
index db924fe379c9..1169d78af2de 100644
--- a/include/linux/lsm_hook_defs.h
+++ b/include/linux/lsm_hook_defs.h
@@ -394,6 +394,8 @@ LSM_HOOK(void, LSM_RET_VOID, bpf_prog_free_security, struct bpf_prog_aux *aux)
 #endif /* CONFIG_BPF_SYSCALL */

 LSM_HOOK(int, 0, locked_down, enum lockdown_reason what)
+LSM_HOOK(int, 0, lock_kernel_down, const char *where, enum lockdown_reason level)
+

 #ifdef CONFIG_PERF_EVENTS
 LSM_HOOK(int, 0, perf_event_open, struct perf_event_attr *attr, int type)
diff --git a/include/linux/lsm_hooks.h b/include/linux/lsm_hooks.h
index 419b5febc3ca..491323dfe4e0 100644
--- a/include/linux/lsm_hooks.h
+++ b/include/linux/lsm_hooks.h
@@ -1549,6 +1549,12 @@
  *
  *     @what: kernel feature being accessed
  *
+ * @lock_kernel_down
+ * 	Put the kernel into lock-down mode.
+ *
+ * 	@where: Where the lock-down is originating from (e.g. command line option)
+ * 	@level: The lock-down level (can only increase)
+ *
  * Security hooks for perf events
  *
  * @perf_event_open:
diff --git a/include/linux/mmzone.h b/include/linux/mmzone.h
index 962b14d403e8..95ecd06fd858 100644
--- a/include/linux/mmzone.h
+++ b/include/linux/mmzone.h
@@ -1398,11 +1398,9 @@ static inline unsigned long *section_to_usemap(struct mem_section *ms)
 static inline struct mem_section *__nr_to_section(unsigned long nr)
 {
 #ifdef CONFIG_SPARSEMEM_EXTREME
-	if (!mem_section)
+	if (!*mem_section || !mem_section[SECTION_NR_TO_ROOT(nr)])
 		return NULL;
 #endif
-	if (!mem_section[SECTION_NR_TO_ROOT(nr)])
-		return NULL;
 	return &mem_section[SECTION_NR_TO_ROOT(nr)][nr & SECTION_ROOT_MASK];
 }
 extern size_t mem_section_usage_size(void);
diff --git a/include/linux/module.h b/include/linux/module.h
index 1e135fd5c076..6ec4d001c1e2 100644
--- a/include/linux/module.h
+++ b/include/linux/module.h
@@ -381,6 +381,7 @@ struct module {
 	struct module_attribute *modinfo_attrs;
 	const char *version;
 	const char *srcversion;
+	const char *rhelversion;
 	struct kobject *holders_dir;

 	/* Exported symbols */
diff --git a/include/linux/panic.h b/include/linux/panic.h
index f5844908a089..901d51012738 100644
--- a/include/linux/panic.h
+++ b/include/linux/panic.h
@@ -74,7 +74,24 @@ static inline void set_arch_panic_timeout(int timeout, int arch_default_timeout)
 #define TAINT_LIVEPATCH			15
 #define TAINT_AUX			16
 #define TAINT_RANDSTRUCT		17
-#define TAINT_FLAGS_COUNT		18
+/* Start of Red Hat-specific taint flags */
+#define TAINT_18			18
+#define TAINT_19			19
+#define TAINT_20			20
+#define TAINT_21			21
+#define TAINT_22			22
+#define TAINT_23			23
+#define TAINT_24			24
+#define TAINT_25			25
+#define TAINT_26			26
+#define TAINT_SUPPORT_REMOVED		27
+/* Bits 28 - 31 are reserved for Red Hat use only */
+#define TAINT_RESERVED28		28
+#define TAINT_RESERVED29		29
+#define TAINT_RESERVED30		30
+#define TAINT_UNPRIVILEGED_BPF		31
+/* End of Red Hat-specific taint flags */
+#define TAINT_FLAGS_COUNT		32
 #define TAINT_FLAGS_MAX			((1UL << TAINT_FLAGS_COUNT) - 1)

 struct taint_flag {
diff --git a/include/linux/pci.h b/include/linux/pci.h
index b957eeb89c7a..16c883f374aa 100644
--- a/include/linux/pci.h
+++ b/include/linux/pci.h
@@ -1491,6 +1491,22 @@ int pci_add_dynid(struct pci_driver *drv,
 		  unsigned long driver_data);
 const struct pci_device_id *pci_match_id(const struct pci_device_id *ids,
 					 struct pci_dev *dev);
+
+#ifdef CONFIG_RHEL_DIFFERENCES
+const struct pci_device_id *pci_hw_deprecated(const struct pci_device_id *ids,
+					      struct pci_dev *dev);
+const struct pci_device_id *pci_hw_unmaintained(const struct pci_device_id *ids,
+						struct pci_dev *dev);
+const struct pci_device_id *pci_hw_disabled(const struct pci_device_id *ids,
+					    struct pci_dev *dev);
+#else
+static inline const struct pci_device_id *pci_hw_deprecated(const struct pci_device_id *ids,
+							    struct pci_dev *dev) { return NULL; }
+static inline const struct pci_device_id *pci_hw_unmaintained(const struct pci_device_id *ids,
+							      struct pci_dev *dev) { return NULL; }
+static inline const struct pci_device_id *pci_hw_disabled(const struct pci_device_id *ids,
+							  struct pci_dev *dev) {return NULL; }
+#endif
 int pci_scan_bridge(struct pci_bus *bus, struct pci_dev *dev, int max,
 		    int pass);

diff --git a/include/linux/random.h b/include/linux/random.h
index f673fbb838b3..c6f631b259fe 100644
--- a/include/linux/random.h
+++ b/include/linux/random.h
@@ -10,6 +10,16 @@

 #include <uapi/linux/random.h>

+struct random_extrng {
+	ssize_t (*extrng_read)(void __user *buf, size_t buflen);
+	struct module *owner;
+};
+
+struct random_ready_callback {
+	struct list_head list;
+	void (*func)(struct random_ready_callback *rdy);
+	struct module *owner;
+};
 struct notifier_block;

 extern void add_device_randomness(const void *, size_t);
@@ -46,6 +56,8 @@ extern bool rng_is_initialized(void);
 extern int register_random_ready_notifier(struct notifier_block *nb);
 extern int unregister_random_ready_notifier(struct notifier_block *nb);
 extern size_t __must_check get_random_bytes_arch(void *buf, size_t nbytes);
+void random_register_extrng(const struct random_extrng *rng);
+void random_unregister_extrng(void);

 #ifndef MODULE
 extern const struct file_operations random_fops, urandom_fops;
diff --git a/include/linux/rh_kabi.h b/include/linux/rh_kabi.h
new file mode 100644
index 000000000000..c7b42c1f1681
--- /dev/null
+++ b/include/linux/rh_kabi.h
@@ -0,0 +1,515 @@
+/*
+ * rh_kabi.h - Red Hat kABI abstraction header
+ *
+ * Copyright (c) 2014 Don Zickus
+ * Copyright (c) 2015-2020 Jiri Benc
+ * Copyright (c) 2015 Sabrina Dubroca, Hannes Frederic Sowa
+ * Copyright (c) 2016-2018 Prarit Bhargava
+ * Copyright (c) 2017 Paolo Abeni, Larry Woodman
+ *
+ * This file is released under the GPLv2.
+ * See the file COPYING for more details.
+ *
+ * These kabi macros hide the changes from the kabi checker and from the
+ * process that computes the exported symbols' checksums.
+ * They have 2 variants: one (defined under __GENKSYMS__) used when
+ * generating the checksums, and the other used when building the kernel's
+ * binaries.
+ *
+ * The use of these macros does not guarantee that the usage and modification
+ * of code is correct.  As with all Red Hat only changes, an engineer must
+ * explain why the use of the macro is valid in the patch containing the
+ * changes.
+ *
+ */
+
+#ifndef _LINUX_RH_KABI_H
+#define _LINUX_RH_KABI_H
+
+#include <linux/kconfig.h>
+#include <linux/compiler.h>
+#include <linux/stringify.h>
+
+/*
+ * NOTE
+ *   Unless indicated otherwise, don't use ';' after these macros as it
+ *   messes up the kABI checker by changing what the resulting token string
+ *   looks like.  Instead let the macros add the ';' so it can be properly
+ *   hidden from the kABI checker (mainly for RH_KABI_EXTEND, but applied to
+ *   most macros for uniformity).
+ *
+ *
+ * RH_KABI_CONST
+ *   Adds a new const modifier to a function parameter preserving the old
+ *   checksum.
+ *
+ * RH_KABI_ADD_MODIFIER
+ *   Adds a new modifier to a function parameter or a typedef, preserving
+ *   the old checksum.  Useful e.g. for adding rcu annotations or changing
+ *   int to unsigned.  Beware that this may change the semantics; if you're
+ *   sure this is safe, always explain why binary compatibility with 3rd
+ *   party modules is retained.
+ *
+ * RH_KABI_DEPRECATE
+ *   Marks the element as deprecated and make it unusable by modules while
+ *   keeping a hole in its place to preserve binary compatibility.
+ *
+ * RH_KABI_DEPRECATE_FN
+ *   Marks the function pointer as deprecated and make it unusable by modules
+ *   while keeping a hole in its place to preserve binary compatibility.
+ *
+ * RH_KABI_EXTEND
+ *   Adds a new field to a struct.  This must always be added to the end of
+ *   the struct.  Before using this macro, make sure this is actually safe
+ *   to do - there is a number of conditions under which it is *not* safe.
+ *   In particular (but not limited to), this macro cannot be used:
+ *   - if the struct in question is embedded in another struct, or
+ *   - if the struct is allocated by drivers either statically or
+ *     dynamically, or
+ *   - if the struct is allocated together with driver data (an example of
+ *     such behavior is struct net_device or struct request).
+ *
+ * RH_KABI_EXTEND_WITH_SIZE
+ *   Adds a new element (usually a struct) to a struct and reserves extra
+ *   space for the new element.  The provided 'size' is the total space to
+ *   be added in longs (i.e. it's 8 * 'size' bytes), including the size of
+ *   the added element.  It is automatically checked that the new element
+ *   does not overflow the reserved space, now nor in the future. However,
+ *   no attempt is done to check the content of the added element (struct)
+ *   for kABI conformance - kABI checking inside the added element is
+ *   effectively switched off.
+ *   For any struct being added by RH_KABI_EXTEND_WITH_SIZE, it is
+ *   recommended its content to be documented as not covered by kABI
+ *   guarantee.
+ *
+ * RH_KABI_FILL_HOLE
+ *   Fills a hole in a struct.
+ *
+ *   Warning: only use if a hole exists for _all_ arches.  Use pahole to verify.
+ *
+ * RH_KABI_RENAME
+ *   Renames an element without changing its type.  This macro can be used in
+ *   bitfields, for example.
+ *
+ *   NOTE: this macro does not add the final ';'
+ *
+ * RH_KABI_REPLACE
+ *   Replaces the _orig field by the _new field.  The size of the occupied
+ *   space is preserved, it's fine if the _new field is smaller than the
+ *   _orig field.  If a _new field is larger or has a different alignment,
+ *   compilation will abort.
+ *
+ * RH_KABI_REPLACE_SPLIT
+ *   Works the same as RH_KABI_REPLACE but replaces a single _orig field by
+ *   multiple new fields.  The checks for size and alignment done by
+ *   RH_KABI_REPLACE are still applied.
+ *
+ * RH_KABI_HIDE_INCLUDE
+ *   Hides the given include file from kABI checksum computations.  This is
+ *   used when a newly added #include makes a previously opaque struct
+ *   visible.
+ *
+ *   Example usage:
+ *   #include RH_KABI_HIDE_INCLUDE(<linux/poll.h>)
+ *
+ * RH_KABI_FAKE_INCLUDE
+ *   Pretends inclusion of the given file for kABI checksum computations.
+ *   This is used when upstream removed a particular #include but that made
+ *   some structures opaque that were previously visible and is causing kABI
+ *   checker failures.
+ *
+ *   Example usage:
+ *   #include RH_KABI_FAKE_INCLUDE(<linux/rhashtable.h>)
+ *
+ * RH_KABI_RESERVE
+ *   Adds a reserved field to a struct.  This is done prior to kABI freeze
+ *   for structs that cannot be expanded later using RH_KABI_EXTEND (for
+ *   example because they are embedded in another struct or because they are
+ *   allocated by drivers or because they use unusual memory layout).  The
+ *   size of the reserved field is 'unsigned long' and is assumed to be
+ *   8 bytes.
+ *
+ *   The argument is a number unique for the given struct; usually, multiple
+ *   RH_KABI_RESERVE macros are added to a struct with numbers starting from
+ *   one.
+ *
+ *   Example usage:
+ *   struct foo {
+ *           int a;
+ *           RH_KABI_RESERVE(1)
+ *           RH_KABI_RESERVE(2)
+ *           RH_KABI_RESERVE(3)
+ *           RH_KABI_RESERVE(4)
+ *   };
+ *
+ * RH_KABI_USE
+ *   Uses a previously reserved field or multiple fields.  The arguments are
+ *   one or more numbers assigned to RH_KABI_RESERVE, followed by a field to
+ *   be put in their place.  The compiler ensures that the new field is not
+ *   larger than the reserved area.
+ *
+ *   Example usage:
+ *   struct foo {
+ *           int a;
+ *           RH_KABI_USE(1, int b)
+ *           RH_KABI_USE(2, 3, int c[3])
+ *           RH_KABI_RESERVE(4)
+ *   };
+ *
+ * RH_KABI_USE_SPLIT
+ *   Works the same as RH_KABI_USE but replaces a single reserved field by
+ *   multiple new fields.
+ *
+ * RH_KABI_AUX_EMBED
+ * RH_KABI_AUX_PTR
+ *   Adds an extenstion of a struct in the form of "auxiliary structure".
+ *   This is done prior to kABI freeze for structs that cannot be expanded
+ *   later using RH_KABI_EXTEND.  See also RH_KABI_RESERVED, these two
+ *   approaches can (and often are) combined.
+ *
+ *   To use this for 'struct foo' (the "base structure"), define a new
+ *   structure called 'struct foo_rh'; this new struct is called "auxiliary
+ *   structure".  Then add RH_KABI_AUX_EMBED or RH_KABI_AUX_PTR to the end
+ *   of the base structure.  The argument is the name of the base structure,
+ *   without the 'struct' keyword.
+ *
+ *   RH_KABI_AUX_PTR stores a pointer to the aux structure in the base
+ *   struct.  The lifecycle of the aux struct needs to be properly taken
+ *   care of.
+ *
+ *   RH_KABI_AUX_EMBED embeds the aux struct into the base struct.  This
+ *   cannot be used when the base struct is itself embedded into another
+ *   struct, allocated in an array, etc.
+ *
+ *   Both approaches (ptr and embed) work correctly even when the aux struct
+ *   is allocated by modules.  To ensure this, the code responsible for
+ *   allocation/assignment of the aux struct has to properly set the size of
+ *   the aux struct; see the RH_KABI_AUX_SET_SIZE and RH_KABI_AUX_INIT_SIZE
+ *   macros.
+ *
+ *   New fields can be later added to the auxiliary structure, always to its
+ *   end.  Note the auxiliary structure cannot be shrunk in size later (i.e.,
+ *   fields cannot be removed, only deprecated).  Any code accessing fields
+ *   from the aux struct must guard the access using the RH_KABI_AUX macro.
+ *   The access itself is then done via a '_rh' field in the base struct.
+ *
+ *   The auxiliary structure is not guaranteed for access by modules unless
+ *   explicitly commented as such in the declaration of the aux struct
+ *   itself or some of its elements.
+ *
+ *   Example:
+ *
+ *   struct foo_rh {
+ *           int newly_added;
+ *   };
+ *
+ *   struct foo {
+ *           bool big_hammer;
+ *           RH_KABI_AUX_PTR(foo)
+ *   };
+ *
+ *   void use(struct foo *f)
+ *   {
+ *           if (RH_KABI_AUX(f, foo, newly_added))
+ *                   f->_rh->newly_added = 123;
+ *	     else
+ *	             // the field 'newly_added' is not present in the passed
+ *	             // struct, fall back to old behavior
+ *	             f->big_hammer = true;
+ *   }
+ *
+ *   static struct foo_rh my_foo_rh {
+ *           .newly_added = 0;
+ *   }
+ *
+ *   static struct foo my_foo = {
+ *           .big_hammer = false,
+ *           ._rh = &my_foo_rh,
+ *           RH_KABI_AUX_INIT_SIZE(foo)
+ *   };
+ *
+ * RH_KABI_USE_AUX_PTR
+ *   Creates an auxiliary structure post kABI freeze.  This works by using
+ *   two reserved fields (thus there has to be two reserved fields still
+ *   available) and converting them to RH_KABI_AUX_PTR.
+ *
+ *   Example:
+ *
+ *   struct foo_rh {
+ *   };
+ *
+ *   struct foo {
+ *           int a;
+ *           RH_KABI_RESERVE(1)
+ *           RH_KABI_USE_AUX_PTR(2, 3, foo)
+ *   };
+ *
+ * RH_KABI_AUX_SET_SIZE
+ * RH_KABI_AUX_INIT_SIZE
+ *   Calculates and stores the size of the auxiliary structure.
+ *
+ *   RH_KABI_AUX_SET_SIZE is for dynamically allocated base structs,
+ *   RH_KABI_AUX_INIT_SIZE is for statically allocated case structs.
+ *
+ *   These macros must be called from the allocation (RH_KABI_AUX_SET_SIZE)
+ *   or declaration (RH_KABI_AUX_INIT_SIZE) site, regardless of whether
+ *   that happens in the kernel or in a module.  Without calling one of
+ *   these macros, the aux struct will appear to have no fields to the
+ *   kernel.
+ *
+ *   Note: since RH_KABI_AUX_SET_SIZE is intended to be invoked outside of
+ *   a struct definition, it does not add the semicolon and must be
+ *   terminated by semicolon by the caller.
+ *
+ * RH_KABI_AUX
+ *   Verifies that the given field exists in the given auxiliary structure.
+ *   This MUST be called prior to accessing that field; failing to do that
+ *   may lead to invalid memory access.
+ *
+ *   The first argument is a pointer to the base struct, the second argument
+ *   is the name of the base struct (without the 'struct' keyword), the
+ *   third argument is the field name.
+ *
+ *   This macro works for structs extended by either of RH_KABI_AUX_EMBED,
+ *   RH_KABI_AUX_PTR and RH_KABI_USE_AUX_PTR.
+ *
+ * RH_KABI_FORCE_CHANGE
+ *   Force change of the symbol checksum.  The argument of the macro is a
+ *   version for cases we need to do this more than once.
+ *
+ *   This macro does the opposite: it changes the symbol checksum without
+ *   actually changing anything about the exported symbol.  It is useful for
+ *   symbols that are not whitelisted, we're changing them in an
+ *   incompatible way and want to prevent 3rd party modules to silently
+ *   corrupt memory.  Instead, by changing the symbol checksum, such modules
+ *   won't be loaded by the kernel.  This macro should only be used as a
+ *   last resort when all other KABI workarounds have failed.
+ *
+ * RH_KABI_EXCLUDE
+ *   !!! WARNING: DANGEROUS, DO NOT USE unless you are aware of all the !!!
+ *   !!! implications. This should be used ONLY EXCEPTIONALLY and only  !!!
+ *   !!! under specific circumstances. Very likely, this macro does not !!!
+ *   !!! do what you expect it to do. Note that any usage of this macro !!!
+ *   !!! MUST be paired with a RH_KABI_FORCE_CHANGE annotation of       !!!
+ *   !!! a suitable symbol (or an equivalent safeguard) and the commit  !!!
+ *   !!! log MUST explain why the chosen solution is appropriate.       !!!
+ *
+ *   Exclude the element from checksum generation.  Any such element is
+ *   considered not to be part of the kABI whitelist and may be changed at
+ *   will.  Note however that it's the responsibility of the developer
+ *   changing the element to ensure 3rd party drivers using this element
+ *   won't panic, for example by not allowing them to be loaded.  That can
+ *   be achieved by changing another, non-whitelisted symbol they use,
+ *   either by nature of the change or by using RH_KABI_FORCE_CHANGE.
+ *
+ *   Also note that any change to the element must preserve its size. Change
+ *   of the size is not allowed and would constitute a silent kABI breakage.
+ *   Beware that the RH_KABI_EXCLUDE macro does not do any size checks.
+ *
+ * RH_KABI_BROKEN_INSERT
+ * RH_KABI_BROKEN_REMOVE
+ *   Insert a field to the middle of a struct / delete a field from a struct.
+ *   Note that this breaks kABI! It can be done only when it's certain that
+ *   no 3rd party driver can validly reach into the struct.  A typical
+ *   example is a struct that is:  both (a) referenced only through a long
+ *   chain of pointers from another struct that is part of a whitelisted
+ *   symbol and (b) kernel internal only, it should have never been visible
+ *   to genksyms in the first place.
+ *
+ *   Another example are structs that are explicitly exempt from kABI
+ *   guarantee but we did not have enough foresight to use RH_KABI_EXCLUDE.
+ *   In this case, the warning for RH_KABI_EXCLUDE applies.
+ *
+ *   A detailed explanation of correctness of every RH_KABI_BROKEN_* macro
+ *   use is especially important.
+ *
+ * RH_KABI_BROKEN_INSERT_BLOCK
+ * RH_KABI_BROKEN_REMOVE_BLOCK
+ *   A version of RH_KABI_BROKEN_INSERT / REMOVE that allows multiple fields
+ *   to be inserted or removed together.  All fields need to be terminated
+ *   by ';' inside(!) the macro parameter.  The macro itself must not be
+ *   terminated by ';'.
+ *
+ * RH_KABI_BROKEN_REPLACE
+ *   Replace a field by a different one without doing any checking.  This
+ *   allows replacing a field by another with a different size.  Similarly
+ *   to other RH_KABI_BROKEN macros, use of this indicates a kABI breakage.
+ *
+ * RH_KABI_BROKEN_INSERT_ENUM
+ * RH_KABI_BROKEN_REMOVE_ENUM
+ *   Insert a field to the middle of an enumaration type / delete a field from
+ *   an enumaration type. Note that this can break kABI especially if the
+ *   number of enum fields is used in an array within a structure. It can be
+ *   done only when it is certain that no 3rd party driver will use the
+ *   enumeration type or a structure that embeds an array with size determined
+ *   by an enumeration type.
+ *
+ * RH_KABI_EXTEND_ENUM
+ *   Adds a new field to an enumeration type.  This must always be added to
+ *   the end of the enum.  Before using this macro, make sure this is actually
+ *   safe to do.
+ */
+
+#undef linux
+#define linux linux
+
+#ifdef __GENKSYMS__
+
+# define RH_KABI_CONST
+# define RH_KABI_ADD_MODIFIER(_new)
+# define RH_KABI_EXTEND(_new)
+# define RH_KABI_FILL_HOLE(_new)
+# define RH_KABI_FORCE_CHANGE(ver)		__attribute__((rh_kabi_change ## ver))
+# define RH_KABI_RENAME(_orig, _new)		_orig
+# define RH_KABI_HIDE_INCLUDE(_file)		<linux/rh_kabi.h>
+# define RH_KABI_FAKE_INCLUDE(_file)		_file
+# define RH_KABI_BROKEN_INSERT(_new)
+# define RH_KABI_BROKEN_REMOVE(_orig)		_orig;
+# define RH_KABI_BROKEN_INSERT_BLOCK(_new)
+# define RH_KABI_BROKEN_REMOVE_BLOCK(_orig)	_orig
+# define RH_KABI_BROKEN_REPLACE(_orig, _new)	_orig;
+# define RH_KABI_BROKEN_INSERT_ENUM(_new)
+# define RH_KABI_BROKEN_REMOVE_ENUM(_orig)	_orig,
+# define RH_KABI_EXTEND_ENUM(_new)
+
+# define _RH_KABI_DEPRECATE(_type, _orig)	_type _orig
+# define _RH_KABI_DEPRECATE_FN(_type, _orig, _args...)	_type (*_orig)(_args)
+# define _RH_KABI_REPLACE(_orig, _new)		_orig
+# define _RH_KABI_EXCLUDE(_elem)
+
+#else
+
+# define RH_KABI_ALIGN_WARNING ".  Disable CONFIG_RH_KABI_SIZE_ALIGN_CHECKS if debugging."
+
+# define RH_KABI_CONST				const
+# define RH_KABI_ADD_MODIFIER(_new)		_new
+# define RH_KABI_EXTEND(_new)			_new;
+# define RH_KABI_FILL_HOLE(_new)		_new;
+# define RH_KABI_FORCE_CHANGE(ver)
+# define RH_KABI_RENAME(_orig, _new)		_new
+# define RH_KABI_HIDE_INCLUDE(_file)		_file
+# define RH_KABI_FAKE_INCLUDE(_file)		<linux/rh_kabi.h>
+# define RH_KABI_BROKEN_INSERT(_new)		_new;
+# define RH_KABI_BROKEN_REMOVE(_orig)
+# define RH_KABI_BROKEN_INSERT_BLOCK(_new)	_new
+# define RH_KABI_BROKEN_REMOVE_BLOCK(_orig)
+# define RH_KABI_BROKEN_REPLACE(_orig, _new)	_new;
+# define RH_KABI_BROKEN_INSERT_ENUM(_new)	_new,
+# define RH_KABI_BROKEN_REMOVE_ENUM(_orig)
+# define RH_KABI_EXTEND_ENUM(_new)		_new,
+
+#if IS_BUILTIN(CONFIG_RH_KABI_SIZE_ALIGN_CHECKS)
+# define __RH_KABI_CHECK_SIZE_ALIGN(_orig, _new)			\
+	union {								\
+		_Static_assert(sizeof(struct{_new;}) <= sizeof(struct{_orig;}), \
+			       __FILE__ ":" __stringify(__LINE__) ": "  __stringify(_new) " is larger than " __stringify(_orig) RH_KABI_ALIGN_WARNING); \
+		_Static_assert(__alignof__(struct{_new;}) <= __alignof__(struct{_orig;}), \
+			       __FILE__ ":" __stringify(__LINE__) ": "  __stringify(_orig) " is not aligned the same as " __stringify(_new) RH_KABI_ALIGN_WARNING); \
+	}
+# define __RH_KABI_CHECK_SIZE(_item, _size)				\
+	_Static_assert(sizeof(struct{_item;}) <= _size,			\
+		       __FILE__ ":" __stringify(__LINE__) ": " __stringify(_item) " is larger than the reserved size (" __stringify(_size) " bytes)" RH_KABI_ALIGN_WARNING)
+#else
+# define __RH_KABI_CHECK_SIZE_ALIGN(_orig, _new)
+# define __RH_KABI_CHECK_SIZE(_item, _size)
+#endif
+
+#define RH_KABI_UNIQUE_ID	__PASTE(rh_kabi_hidden_, __LINE__)
+
+# define _RH_KABI_DEPRECATE(_type, _orig)	_type rh_reserved_##_orig
+# define _RH_KABI_DEPRECATE_FN(_type, _orig, _args...)  \
+	_type (* rh_reserved_##_orig)(_args)
+# define _RH_KABI_REPLACE(_orig, _new)			  \
+	union {						  \
+		_new;					  \
+		struct {				  \
+			_orig;				  \
+		} RH_KABI_UNIQUE_ID;			  \
+		__RH_KABI_CHECK_SIZE_ALIGN(_orig, _new);  \
+	}
+
+# define _RH_KABI_EXCLUDE(_elem)		_elem
+
+#endif /* __GENKSYMS__ */
+
+# define RH_KABI_DEPRECATE(_type, _orig)	_RH_KABI_DEPRECATE(_type, _orig);
+# define RH_KABI_DEPRECATE_FN(_type, _orig, _args...)  \
+	_RH_KABI_DEPRECATE_FN(_type, _orig, _args);
+# define RH_KABI_REPLACE(_orig, _new)		_RH_KABI_REPLACE(_orig, _new);
+
+#define _RH_KABI_REPLACE1(_new)		_new;
+#define _RH_KABI_REPLACE2(_new, ...)	_new; _RH_KABI_REPLACE1(__VA_ARGS__)
+#define _RH_KABI_REPLACE3(_new, ...)	_new; _RH_KABI_REPLACE2(__VA_ARGS__)
+#define _RH_KABI_REPLACE4(_new, ...)	_new; _RH_KABI_REPLACE3(__VA_ARGS__)
+#define _RH_KABI_REPLACE5(_new, ...)	_new; _RH_KABI_REPLACE4(__VA_ARGS__)
+#define _RH_KABI_REPLACE6(_new, ...)	_new; _RH_KABI_REPLACE5(__VA_ARGS__)
+#define _RH_KABI_REPLACE7(_new, ...)	_new; _RH_KABI_REPLACE6(__VA_ARGS__)
+#define _RH_KABI_REPLACE8(_new, ...)	_new; _RH_KABI_REPLACE7(__VA_ARGS__)
+#define _RH_KABI_REPLACE9(_new, ...)	_new; _RH_KABI_REPLACE8(__VA_ARGS__)
+#define _RH_KABI_REPLACE10(_new, ...)	_new; _RH_KABI_REPLACE9(__VA_ARGS__)
+#define _RH_KABI_REPLACE11(_new, ...)	_new; _RH_KABI_REPLACE10(__VA_ARGS__)
+#define _RH_KABI_REPLACE12(_new, ...)	_new; _RH_KABI_REPLACE11(__VA_ARGS__)
+
+#define RH_KABI_REPLACE_SPLIT(_orig, ...)	_RH_KABI_REPLACE(_orig, \
+		struct { __PASTE(_RH_KABI_REPLACE, COUNT_ARGS(__VA_ARGS__))(__VA_ARGS__) });
+
+# define RH_KABI_RESERVE(n)		_RH_KABI_RESERVE(n);
+
+#define _RH_KABI_USE1(n, _new)	_RH_KABI_RESERVE(n), _new
+#define _RH_KABI_USE2(n, ...)	_RH_KABI_RESERVE(n); _RH_KABI_USE1(__VA_ARGS__)
+#define _RH_KABI_USE3(n, ...)	_RH_KABI_RESERVE(n); _RH_KABI_USE2(__VA_ARGS__)
+#define _RH_KABI_USE4(n, ...)	_RH_KABI_RESERVE(n); _RH_KABI_USE3(__VA_ARGS__)
+#define _RH_KABI_USE5(n, ...)	_RH_KABI_RESERVE(n); _RH_KABI_USE4(__VA_ARGS__)
+#define _RH_KABI_USE6(n, ...)	_RH_KABI_RESERVE(n); _RH_KABI_USE5(__VA_ARGS__)
+#define _RH_KABI_USE7(n, ...)	_RH_KABI_RESERVE(n); _RH_KABI_USE6(__VA_ARGS__)
+#define _RH_KABI_USE8(n, ...)	_RH_KABI_RESERVE(n); _RH_KABI_USE7(__VA_ARGS__)
+#define _RH_KABI_USE9(n, ...)	_RH_KABI_RESERVE(n); _RH_KABI_USE8(__VA_ARGS__)
+#define _RH_KABI_USE10(n, ...)	_RH_KABI_RESERVE(n); _RH_KABI_USE9(__VA_ARGS__)
+#define _RH_KABI_USE11(n, ...)	_RH_KABI_RESERVE(n); _RH_KABI_USE10(__VA_ARGS__)
+#define _RH_KABI_USE12(n, ...)	_RH_KABI_RESERVE(n); _RH_KABI_USE11(__VA_ARGS__)
+
+#define _RH_KABI_USE(...)	_RH_KABI_REPLACE(__VA_ARGS__)
+#define RH_KABI_USE(n, ...)	_RH_KABI_USE(__PASTE(_RH_KABI_USE, COUNT_ARGS(__VA_ARGS__))(n, __VA_ARGS__));
+
+# define RH_KABI_USE_SPLIT(n, ...)	RH_KABI_REPLACE_SPLIT(_RH_KABI_RESERVE(n), __VA_ARGS__)
+
+# define _RH_KABI_RESERVE(n)		unsigned long rh_reserved##n
+
+#define RH_KABI_EXCLUDE(_elem)		_RH_KABI_EXCLUDE(_elem);
+
+#define RH_KABI_EXTEND_WITH_SIZE(_new, _size)				\
+	RH_KABI_EXTEND(union {						\
+		_new;							\
+		unsigned long RH_KABI_UNIQUE_ID[_size];			\
+		__RH_KABI_CHECK_SIZE(_new, 8 * (_size));		\
+	})
+
+#define _RH_KABI_AUX_PTR(_struct)					\
+	size_t _struct##_size_rh;					\
+	_RH_KABI_EXCLUDE(struct _struct##_rh *_rh)
+#define RH_KABI_AUX_PTR(_struct)					\
+	_RH_KABI_AUX_PTR(_struct);
+
+#define _RH_KABI_AUX_EMBED(_struct)					\
+	size_t _struct##_size_rh;					\
+	_RH_KABI_EXCLUDE(struct _struct##_rh _rh)
+#define RH_KABI_AUX_EMBED(_struct)					\
+	_RH_KABI_AUX_EMBED(_struct);
+
+#define RH_KABI_USE_AUX_PTR(n1, n2, _struct)				\
+	RH_KABI_USE(n1, n2,						\
+		     struct { RH_KABI_AUX_PTR(_struct) })
+
+#define RH_KABI_AUX_SET_SIZE(_name, _struct) ({				\
+	(_name)->_struct##_size_rh = sizeof(struct _struct##_rh);	\
+})
+
+#define RH_KABI_AUX_INIT_SIZE(_struct)					\
+	._struct##_size_rh = sizeof(struct _struct##_rh),
+
+#define RH_KABI_AUX(_ptr, _struct, _field) ({				\
+	size_t __off = offsetof(struct _struct##_rh, _field);		\
+	(_ptr)->_struct##_size_rh > __off ? true : false;		\
+})
+
+#endif /* _LINUX_RH_KABI_H */
diff --git a/include/linux/rmi.h b/include/linux/rmi.h
index ab7eea01ab42..fff7c5f737fc 100644
--- a/include/linux/rmi.h
+++ b/include/linux/rmi.h
@@ -364,6 +364,7 @@ struct rmi_driver_data {

 	struct rmi4_attn_data attn_data;
 	DECLARE_KFIFO(attn_fifo, struct rmi4_attn_data, 16);
+	struct work_struct attn_work;
 };

 int rmi_register_transport_device(struct rmi_transport_dev *xport);
diff --git a/include/linux/security.h b/include/linux/security.h
index 25b3ef71f495..d37a6c88c69f 100644
--- a/include/linux/security.h
+++ b/include/linux/security.h
@@ -471,6 +471,7 @@ int security_inode_notifysecctx(struct inode *inode, void *ctx, u32 ctxlen);
 int security_inode_setsecctx(struct dentry *dentry, void *ctx, u32 ctxlen);
 int security_inode_getsecctx(struct inode *inode, void **ctx, u32 *ctxlen);
 int security_locked_down(enum lockdown_reason what);
+int security_lock_kernel_down(const char *where, enum lockdown_reason level);
 #else /* CONFIG_SECURITY */

 static inline int call_blocking_lsm_notifier(enum lsm_event event, void *data)
@@ -1347,6 +1348,10 @@ static inline int security_locked_down(enum lockdown_reason what)
 {
 	return 0;
 }
+static inline int security_lock_kernel_down(const char *where, enum lockdown_reason level)
+{
+	return 0;
+}
 #endif	/* CONFIG_SECURITY */

 #if defined(CONFIG_SECURITY) && defined(CONFIG_WATCH_QUEUE)
diff --git a/init/Kconfig b/init/Kconfig
index 97463a33baa7..9275dae4d368 100644
--- a/init/Kconfig
+++ b/init/Kconfig
@@ -1649,7 +1649,7 @@ config AIO
 	  this option saves about 7k.

 config IO_URING
-	bool "Enable IO uring support" if EXPERT
+	bool "Enable IO uring support"
 	select IO_WQ
 	default y
 	help
diff --git a/kernel/Makefile b/kernel/Makefile
index 56f4ee97f328..2dfcaac71418 100644
--- a/kernel/Makefile
+++ b/kernel/Makefile
@@ -12,6 +12,7 @@ obj-y     = fork.o exec_domain.o panic.o \
 	    notifier.o ksysfs.o cred.o reboot.o \
 	    async.o range.o smpboot.o ucount.o regset.o

+obj-$(CONFIG_RHEL_DIFFERENCES) += rh_messages.o
 obj-$(CONFIG_USERMODE_DRIVER) += usermode_driver.o
 obj-$(CONFIG_MODULES) += kmod.o
 obj-$(CONFIG_MULTIUSER) += groups.o
diff --git a/kernel/bpf/syscall.c b/kernel/bpf/syscall.c
index cdaa1152436a..3aff64e17359 100644
--- a/kernel/bpf/syscall.c
+++ b/kernel/bpf/syscall.c
@@ -25,6 +25,7 @@
 #include <linux/ctype.h>
 #include <linux/nospec.h>
 #include <linux/audit.h>
+#include <linux/init.h>
 #include <uapi/linux/btf.h>
 #include <linux/pgtable.h>
 #include <linux/bpf_lsm.h>
@@ -52,6 +53,23 @@ static DEFINE_SPINLOCK(map_idr_lock);
 static DEFINE_IDR(link_idr);
 static DEFINE_SPINLOCK(link_idr_lock);

+static int __init unprivileged_bpf_setup(char *str)
+{
+	unsigned long disabled;
+	if (!kstrtoul(str, 0, &disabled))
+		sysctl_unprivileged_bpf_disabled = !!disabled;
+
+	if (!sysctl_unprivileged_bpf_disabled) {
+		pr_warn("Unprivileged BPF has been enabled "
+			"(unprivileged_bpf_disabled=0 has been supplied "
+			"in boot parameters), tainting the kernel");
+		add_taint(TAINT_UNPRIVILEGED_BPF, LOCKDEP_STILL_OK);
+	}
+
+	return 1;
+}
+__setup("unprivileged_bpf_disabled=", unprivileged_bpf_setup);
+
 int sysctl_unprivileged_bpf_disabled __read_mostly =
 	IS_BUILTIN(CONFIG_BPF_UNPRIV_DEFAULT_OFF) ? 2 : 0;

diff --git a/kernel/module.c b/kernel/module.c
index 6cea788fd965..237887c5d9e0 100644
--- a/kernel/module.c
+++ b/kernel/module.c
@@ -743,6 +743,7 @@ static struct module_attribute modinfo_##field = {                    \

 MODINFO_ATTR(version);
 MODINFO_ATTR(srcversion);
+MODINFO_ATTR(rhelversion);

 static char last_unloaded_module[MODULE_NAME_LEN+1];

@@ -1205,6 +1206,7 @@ static struct module_attribute *modinfo_attrs[] = {
 	&module_uevent,
 	&modinfo_version,
 	&modinfo_srcversion,
+	&modinfo_rhelversion,
 	&modinfo_initstate,
 	&modinfo_coresize,
 	&modinfo_initsize,
diff --git a/kernel/module_signing.c b/kernel/module_signing.c
index 8723ae70ea1f..fb2d773498c2 100644
--- a/kernel/module_signing.c
+++ b/kernel/module_signing.c
@@ -38,8 +38,15 @@ int mod_verify_sig(const void *mod, struct load_info *info)
 	modlen -= sig_len + sizeof(ms);
 	info->len = modlen;

-	return verify_pkcs7_signature(mod, modlen, mod + modlen, sig_len,
+	ret = verify_pkcs7_signature(mod, modlen, mod + modlen, sig_len,
 				      VERIFY_USE_SECONDARY_KEYRING,
 				      VERIFYING_MODULE_SIGNATURE,
 				      NULL, NULL);
+	if (ret == -ENOKEY && IS_ENABLED(CONFIG_INTEGRITY_PLATFORM_KEYRING)) {
+		ret = verify_pkcs7_signature(mod, modlen, mod + modlen, sig_len,
+				VERIFY_USE_PLATFORM_KEYRING,
+				VERIFYING_MODULE_SIGNATURE,
+				NULL, NULL);
+	}
+	return ret;
 }
diff --git a/kernel/panic.c b/kernel/panic.c
index eb4dfb932c85..c884a0b18445 100644
--- a/kernel/panic.c
+++ b/kernel/panic.c
@@ -404,6 +404,20 @@ const struct taint_flag taint_flags[TAINT_FLAGS_COUNT] = {
 	[ TAINT_LIVEPATCH ]		= { 'K', ' ', true },
 	[ TAINT_AUX ]			= { 'X', ' ', true },
 	[ TAINT_RANDSTRUCT ]		= { 'T', ' ', true },
+	[ TAINT_18 ]			= { '?', '-', false },
+	[ TAINT_19 ]			= { '?', '-', false },
+	[ TAINT_20 ]			= { '?', '-', false },
+	[ TAINT_21 ]			= { '?', '-', false },
+	[ TAINT_22 ]			= { '?', '-', false },
+	[ TAINT_23 ]			= { '?', '-', false },
+	[ TAINT_24 ]			= { '?', '-', false },
+	[ TAINT_25 ]			= { '?', '-', false },
+	[ TAINT_26 ]			= { '?', '-', false },
+	[ TAINT_SUPPORT_REMOVED ]	= { 'h', ' ', false },
+	[ TAINT_RESERVED28 ]		= { '?', '-', false },
+	[ TAINT_RESERVED29 ]		= { '?', '-', false },
+	[ TAINT_RESERVED30 ]		= { '?', '-', false },
+	[ TAINT_UNPRIVILEGED_BPF ]	= { 'u', ' ', false },
 };

 /**
diff --git a/kernel/rh_messages.c b/kernel/rh_messages.c
new file mode 100644
index 000000000000..345a979cd0e4
--- /dev/null
+++ b/kernel/rh_messages.c
@@ -0,0 +1,179 @@
+#include <linux/kernel.h>
+#include <linux/module.h>
+
+#define DEV_DESC_LEN 256
+/*
+ * The following functions are used by Red Hat to indicate to users that
+ * hardware and drivers are unsupported, or have limited support in RHEL major
+ * and minor releases.  These functions output loud warning messages to the end
+ * user and should be USED WITH CAUTION.
+ *
+ * Any use of these functions _MUST_ be documented in the RHEL Release Notes,
+ * and have approval of management.
+ *
+ * Generally, the process of disabling a driver or device in RHEL requires the
+ * driver or device to be marked as 'deprecated' in all existing releases, and
+ * then either 'unmaintained' or 'disabled' in a future release.
+ *
+ * In general, deprecated and unmaintained drivers continue to receive security
+ * related fixes until they are disabled.
+ */
+
+/**
+ * mark_hardware_unmaintained() - Mark hardware as unmaintained.
+ * @driver_name: driver name
+ * @fmt: format for device description
+ * @...: args for device description
+ *
+ * Called to notify users that the device will no longer be tested on a routine
+ * basis and driver code associated with this device is no longer being updated.
+ * Red Hat may fix security-related and critical issues.  Support for this device
+ * will be disabled in a future major release and users deploying this device
+ * should plan to replace the device in production systems.
+ *
+ * This function should be used when the driver's usage can be tied to a
+ * specific hardware device.  For example, a network device driver loading on a
+ * specific device that is no longer maintained by the manufacturer.
+ */
+void mark_hardware_unmaintained(const char *driver_name, char *fmt, ...)
+{
+	char device_description[DEV_DESC_LEN];
+	va_list args;
+
+	va_start(args, fmt);
+	vsnprintf(device_description, DEV_DESC_LEN, fmt, args);
+	pr_crit("Warning: Unmaintained hardware is detected:  %s:%s\n", driver_name,
+		device_description);
+	va_end(args);
+}
+EXPORT_SYMBOL(mark_hardware_unmaintained);
+
+/**
+ * mark_driver_unmaintained() - Mark a driver as unmaintained.
+ * @driver_name: driver name
+ *
+ * Called to notify users that a driver will no longer be tested on a routine
+ * basis and the driver code is no longer being updated.  Red Hat may fix
+ * security-related and critical issues.  Support for this driver will be
+ * disabled in a future major release, and users should replace any affected
+ * devices in production systems.
+ *
+ * This function should be used when a driver's usage cannot be tied to a
+ * specific hardware device.  For example, a network bonding driver or a higher
+ * level storage layer driver that is no longer maintained upstream.
+ */
+void mark_driver_unmaintained(const char *driver_name)
+{
+	pr_crit("Warning: Unmaintained driver is detected:  %s\n", driver_name);
+}
+EXPORT_SYMBOL(mark_driver_unmaintained);
+
+/**
+ * mark_hardware_deprecated() - Mark hardware as deprecated.
+ * @driver_name: driver name
+ * @fmt: format for device description
+ * @...: args for device description
+ *
+ * Called to notify users that support for the device is planned to be
+ * unmaintained in a future major release, and will eventually be disabled in a
+ * future major release.  This device should not be used in new production
+ * environments and users should replace the device in production systems.
+ *
+ * This function should be used when the driver's usage can be tied to a
+ * specific hardware device.  For example, a network device driver loading on a
+ * specific device that is no longer maintained by the manufacturer.
+ */
+void mark_hardware_deprecated(const char *driver_name, char *fmt, ...)
+{
+	char device_description[DEV_DESC_LEN];
+	va_list args;
+
+	va_start(args, fmt);
+	vsnprintf(device_description, DEV_DESC_LEN, fmt, args);
+	pr_crit("Warning: Deprecated Hardware is detected: %s:%s will not be maintained in a future major release and may be disabled\n",
+		driver_name, device_description);
+	va_end(args);
+}
+EXPORT_SYMBOL(mark_hardware_deprecated);
+
+/**
+ * mark_driver_deprecated() - Mark a driver as deprecated.
+ * @driver_name: driver name
+ *
+ * Called to notify users that support for this driver is planned to be
+ * unmaintained in a future major release, and will eventually be disabled in a
+ * future major release.  This driver should not be used in new production
+ * environments and users should replace any affected devices in production
+ * systems.
+ *
+ * This function should be used when a driver's usage cannot be tied to a
+ * specific hardware device.  For example, a network bonding driver or a higher
+ * level storage layer driver that is no longer maintained upstream.
+ */
+void mark_driver_deprecated(const char *driver_name)
+{
+	pr_crit("Warning: Deprecated Driver is detected: %s will not be maintained in a future major release and may be disabled\n",
+		driver_name);
+}
+EXPORT_SYMBOL(mark_driver_deprecated);
+
+/**
+ * mark_hardware_disabled() - Mark a driver as removed.
+ * @driver_name: driver name
+ * @fmt: format for device description
+ * @...: args for device description
+ *
+ * Called to notify users that a device's support has been completely disabled
+ * and no future support updates will occur.  This device cannot be used in new
+ * production environments, and users must replace the device in production
+ * systems.
+ *
+ * This function should be used when the driver's usage can be tied to a
+ * specific hardware device.  For example, a network device driver loading on a
+ * specific device that is no longer maintained by the manufacturer.
+ */
+void mark_hardware_disabled(const char *driver_name, char *fmt, ...)
+{
+	char device_description[DEV_DESC_LEN];
+	va_list args;
+
+	va_start(args, fmt);
+	vsnprintf(device_description, DEV_DESC_LEN, fmt, args);
+	pr_crit("Warning: Disabled Hardware is detected: %s:%s is no longer enabled in this release.\n",
+		driver_name, device_description);
+	va_end(args);
+}
+EXPORT_SYMBOL(mark_hardware_disabled);
+
+/**
+ * mark_tech_preview() - Mark driver or kernel subsystem as 'Tech Preview'
+ * @msg: Driver or kernel subsystem name
+ *
+ * Called to minimize the support status of a new driver.  This does TAINT the
+ * kernel.  Calling this function indicates that the driver or subsystem has
+ * had limited testing and is not marked for full support within this RHEL
+ * minor release.  The next RHEL minor release may contain full support for
+ * this driver.  Red Hat does not guarantee that bugs reported against this
+ * driver or subsystem will be resolved.
+ */
+void mark_tech_preview(const char *msg, struct module *mod)
+{
+	const char *str = NULL;
+
+	if (msg)
+		str = msg;
+#ifdef CONFIG_MODULES
+	else if (mod && mod->name)
+		str = mod->name;
+#endif
+
+	pr_warn("TECH PREVIEW: %s may not be fully supported.\n"
+		"Please review provided documentation for limitations.\n",
+		(str ? str : "kernel"));
+	add_taint(TAINT_AUX, LOCKDEP_STILL_OK);
+#ifdef CONFIG_MODULES
+	if (mod)
+		mod->taints |= (1U << TAINT_AUX);
+#endif
+}
+EXPORT_SYMBOL(mark_tech_preview);
diff --git a/kernel/sysctl.c b/kernel/sysctl.c
index 830aaf8ca08e..080bafbeabef 100644
--- a/kernel/sysctl.c
+++ b/kernel/sysctl.c
@@ -199,6 +199,11 @@ static int bpf_unpriv_handler(struct ctl_table *table, int write,
 	if (write && !ret) {
 		if (locked_state && unpriv_enable != 1)
 			return -EPERM;
+		if (!unpriv_enable) {
+			pr_warn("Unprivileged BPF has been enabled, "
+				"tainting the kernel");
+			add_taint(TAINT_UNPRIVILEGED_BPF, LOCKDEP_STILL_OK);
+		}
 		*(int *)table->data = unpriv_enable;
 	}

diff --git a/mm/cma.c b/mm/cma.c
index eaa4b5c920a2..27563a5fedcd 100644
--- a/mm/cma.c
+++ b/mm/cma.c
@@ -125,6 +125,12 @@ static void __init cma_activate_area(struct cma *cma)
 	spin_lock_init(&cma->mem_head_lock);
 #endif

+#ifdef CONFIG_RHEL_DIFFERENCES
+	/* s390x and ppc64 has been using CMA already in RHEL 8 as default. */
+	if (!IS_ENABLED(CONFIG_S390) && !IS_ENABLED(CONFIG_PPC64))
+		mark_tech_preview("CMA", NULL);
+#endif /* CONFIG_RHEL_DIFFERENCES */
+
 	return;

 not_in_zone:
@@ -434,6 +440,10 @@ struct page *cma_alloc(struct cma *cma, unsigned long count,
 	if (!cma || !cma->count || !cma->bitmap)
 		goto out;

+#ifdef CONFIG_RHEL_DIFFERENCES
+	pr_info_once("Initial CMA usage detected\n");
+#endif /* CONFIG_RHEL_DIFFERENCES */
+
 	pr_debug("%s(cma %p, count %lu, align %d)\n", __func__, (void *)cma,
 		 count, align);

diff --git a/scripts/mod/modpost.c b/scripts/mod/modpost.c
index d10f93aac1c8..253455a77e19 100644
--- a/scripts/mod/modpost.c
+++ b/scripts/mod/modpost.c
@@ -21,6 +21,7 @@
 #include <errno.h>
 #include "modpost.h"
 #include "../../include/linux/license.h"
+#include "../../include/generated/uapi/linux/version.h"

 /* Are we using CONFIG_MODVERSIONS? */
 static int modversions = 0;
@@ -2373,6 +2374,12 @@ static void write_buf(struct buffer *b, const char *fname)
 	}
 }

+static void add_rhelversion(struct buffer *b, struct module *mod)
+{
+	buf_printf(b, "MODULE_INFO(rhelversion, \"%d.%d\");\n", RHEL_MAJOR,
+		   RHEL_MINOR);
+}
+
 static void write_if_changed(struct buffer *b, const char *fname)
 {
 	char *tmp;
@@ -2602,6 +2609,7 @@ int main(int argc, char **argv)
 		add_depends(&buf, mod);
 		add_moddevtable(&buf, mod);
 		add_srcversion(&buf, mod);
+		add_rhelversion(&buf, mod);

 		sprintf(fname, "%s.mod.c", mod->name);
 		write_if_changed(&buf, fname);
diff --git a/scripts/tags.sh b/scripts/tags.sh
index 16d475b3e203..4e333f14b84e 100755
--- a/scripts/tags.sh
+++ b/scripts/tags.sh
@@ -16,6 +16,8 @@ fi
 ignore="$(echo "$RCS_FIND_IGNORE" | sed 's|\\||g' )"
 # tags and cscope files should also ignore MODVERSION *.mod.c files
 ignore="$ignore ( -name *.mod.c ) -prune -o"
+# RHEL tags and cscope should also ignore redhat/rpm
+ignore="$ignore ( -path redhat/rpm ) -prune -o"

 # Use make KBUILD_ABS_SRCTREE=1 {tags|cscope}
 # to force full paths for a non-O= build
diff --git a/security/integrity/platform_certs/load_uefi.c b/security/integrity/platform_certs/load_uefi.c
index 5f45c3c07dbd..86609ec63b86 100644
--- a/security/integrity/platform_certs/load_uefi.c
+++ b/security/integrity/platform_certs/load_uefi.c
@@ -47,7 +47,8 @@ static __init void *get_cert_list(efi_char16_t *name, efi_guid_t *guid,
 		return NULL;

 	if (*status != EFI_BUFFER_TOO_SMALL) {
-		pr_err("Couldn't get size: 0x%lx\n", *status);
+		pr_err("Couldn't get size: %s (0x%lx)\n",
+		       efi_status_to_str(*status), *status);
 		return NULL;
 	}

@@ -58,7 +59,8 @@ static __init void *get_cert_list(efi_char16_t *name, efi_guid_t *guid,
 	*status = efi.get_variable(name, guid, NULL, &lsize, db);
 	if (*status != EFI_SUCCESS) {
 		kfree(db);
-		pr_err("Error reading db var: 0x%lx\n", *status);
+		pr_err("Error reading db var: %s (0x%lx)\n",
+		       efi_status_to_str(*status), *status);
 		return NULL;
 	}

diff --git a/security/lockdown/Kconfig b/security/lockdown/Kconfig
index e84ddf484010..d0501353a4b9 100644
--- a/security/lockdown/Kconfig
+++ b/security/lockdown/Kconfig
@@ -16,6 +16,19 @@ config SECURITY_LOCKDOWN_LSM_EARLY
 	  subsystem is fully initialised. If enabled, lockdown will
 	  unconditionally be called before any other LSMs.

+config LOCK_DOWN_IN_EFI_SECURE_BOOT
+	bool "Lock down the kernel in EFI Secure Boot mode"
+	default n
+	depends on EFI && SECURITY_LOCKDOWN_LSM_EARLY
+	help
+	  UEFI Secure Boot provides a mechanism for ensuring that the firmware
+	  will only load signed bootloaders and kernels.  Secure boot mode may
+	  be determined from EFI variables provided by the system firmware if
+	  not indicated by the boot parameters.
+
+	  Enabling this option results in kernel lockdown being triggered if
+	  EFI Secure Boot is set.
+
 choice
 	prompt "Kernel default lockdown mode"
 	default LOCK_DOWN_KERNEL_FORCE_NONE
diff --git a/security/lockdown/lockdown.c b/security/lockdown/lockdown.c
index 87cbdc64d272..18555cf18da7 100644
--- a/security/lockdown/lockdown.c
+++ b/security/lockdown/lockdown.c
@@ -73,6 +73,7 @@ static int lockdown_is_locked_down(enum lockdown_reason what)

 static struct security_hook_list lockdown_hooks[] __lsm_ro_after_init = {
 	LSM_HOOK_INIT(locked_down, lockdown_is_locked_down),
+	LSM_HOOK_INIT(lock_kernel_down, lock_kernel_down),
 };

 static int __init lockdown_lsm_init(void)
diff --git a/security/security.c b/security/security.c
index b7cf5cbfdc67..3cde9062fcf6 100644
--- a/security/security.c
+++ b/security/security.c
@@ -2623,6 +2623,12 @@ int security_locked_down(enum lockdown_reason what)
 }
 EXPORT_SYMBOL(security_locked_down);

+int security_lock_kernel_down(const char *where, enum lockdown_reason level)
+{
+	return call_int_hook(lock_kernel_down, 0, where, level);
+}
+EXPORT_SYMBOL(security_lock_kernel_down);
+
 #ifdef CONFIG_PERF_EVENTS
 int security_perf_event_open(struct perf_event_attr *attr, int type)
 {