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* x86, genapic: cleanup 32-bit apic_summit templateIngo Molnar2009-01-281-1/+57
| | | | | | | | | | Clean up the APIC driver template: - order fields properly - use the macro names explicitly (so that they can be renamed later) - fill in NULL entries as well Signed-off-by: Ingo Molnar <mingo@elte.hu>
* x86, genapic: cleanup 32-bit apic_es7000 templateIngo Molnar2009-01-281-1/+57
| | | | | | | | | | Clean up the APIC driver template: - order fields properly - use the macro names explicitly (so that they can be renamed later) - fill in NULL entries as well Signed-off-by: Ingo Molnar <mingo@elte.hu>
* x86, genapic: cleanup 32-bit apic_numaq templateIngo Molnar2009-01-281-1/+57
| | | | | | | | | | Clean up the APIC driver template: - order fields properly - use the macro names explicitly (so that they can be renamed later) - fill in NULL entries as well Signed-off-by: Ingo Molnar <mingo@elte.hu>
* x86, genapic: cleanup 32-bit apic_bigsmp templateIngo Molnar2009-01-281-1/+57
| | | | | | | | | | Clean up the APIC driver template: - order fields properly - use the macro names explicitly (so that they can be renamed later) - fill in NULL entries as well Signed-off-by: Ingo Molnar <mingo@elte.hu>
* x86, genapic: cleanup 32-bit apic_default templateIngo Molnar2009-01-281-1/+57
| | | | | | | | | | Clean up the APIC driver template: - order fields properly - use the macro names explicitly (so that they can be renamed later) - fill in NULL entries as well Signed-off-by: Ingo Molnar <mingo@elte.hu>
* x86: clean up apic_x2apic_clusterIngo Molnar2009-01-281-19/+55
| | | | | | | | | - reorder fields so that they appear in struct genapic field ordering - add zero-initialized fields too so that it's apparent which functionality is default / missing. Signed-off-by: Ingo Molnar <mingo@elte.hu>
* x86: clean up apic_x2apic_physIngo Molnar2009-01-281-19/+55
| | | | | | | | | - reorder fields so that they appear in struct genapic field ordering - add zero-initialized fields too so that it's apparent which functionality is default / missing. Signed-off-by: Ingo Molnar <mingo@elte.hu>
* x86: clean up apic_x2apic_uv_xIngo Molnar2009-01-281-19/+55
| | | | | | | | | - reorder fields so that they appear in struct genapic field ordering - add zero-initialized fields too so that it's apparent which functionality is default / missing. Signed-off-by: Ingo Molnar <mingo@elte.hu>
* x86: clean up genapic_phys_flatIngo Molnar2009-01-281-19/+56
| | | | | | | | | - reorder fields so that they appear in struct genapic field ordering - add zero-initialized fields too so that it's apparent which functionality is default / missing. Signed-off-by: Ingo Molnar <mingo@elte.hu>
* x86: clean up genapic_flatIngo Molnar2009-01-281-19/+54
| | | | | | | | | - reorder fields so that they appear in struct genapic field ordering - add zero-initialized fields too so that it's apparent which functionality is default / missing. Signed-off-by: Ingo Molnar <mingo@elte.hu>
* x86: rename 'genapic' to 'apic'Ingo Molnar2009-01-2815-127/+127
| | | | | | | | Rename genapic-> to apic-> references because in a future chagne we'll open-code all the indirect calls (instead of obscuring them via macros), so we want this reference to be as short as possible. Signed-off-by: Ingo Molnar <mingo@elte.hu>
* x86, genapic: provide IPI callbacks unconditionallyIngo Molnar2009-01-281-2/+1
| | | | | | | 64-bit x86 uses the IPI callbacks even on UP - so provide them generally. Signed-off-by: Ingo Molnar <mingo@elte.hu>
* x86, genapic: cleanupsIngo Molnar2009-01-281-9/+8
| | | | | | Unify genapic.h some more. Signed-off-by: Ingo Molnar <mingo@elte.hu>
* x86, genapic: finish unificationIngo Molnar2009-01-283-86/+78
| | | | | | Unify remaining bits of genapic_32/64.h. Signed-off-by: Ingo Molnar <mingo@elte.hu>
* x86, genapic: unify struct genapicIngo Molnar2009-01-283-184/+96
| | | | | | | Move over the (now identical) struct genapic definitions from genapic_32/64.h to genapic.h. Signed-off-by: Ingo Molnar <mingo@elte.hu>
* x86, genapic: refactor genapic_32.hIngo Molnar2009-01-281-10/+27
| | | | | | | | | | | Impact: pre unification cleanup Make genapic_32.h similar to genapic_64.h: reorder fields, unify types and bring in new entries. No existing functionality is affected. Signed-off-by: Ingo Molnar <mingo@elte.hu>
* x86, genapic: refactor genapic_64.hIngo Molnar2009-01-281-9/+59
| | | | | | | | | | | Impact: pre unification cleanup Make genapic_64.h similar to genapic_32.h: reorder fields, unify types and bring in new entries. No existing functionality is affected. Signed-off-by: Ingo Molnar <mingo@elte.hu>
*-----------------------. Merge branches 'x86/asm', 'x86/cleanups', 'x86/cpudetect', 'x86/debug', ↵Ingo Molnar2009-01-2836-891/+616
|\ \ \ \ \ \ \ \ \ \ \ \ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | 'x86/doc', 'x86/header-fixes', 'x86/mm', 'x86/paravirt', 'x86/pat', 'x86/setup-v2', 'x86/subarch', 'x86/uaccess' and 'x86/urgent' into x86/core
| | | | | | | | | | | | | * x86: correct the CPUID pattern for MSR_IA32_MISC_ENABLE availabilityH. Peter Anvin2009-01-261-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Impact: re-enable CPUID unmasking on affected processors As far as I am capable of discerning from the documentation, MSR_IA32_MISC_ENABLE should be available for all family 0xf CPUs, as well as family 6 for model >= 0xd (newer Pentium M). The documentation on this isn't ideal, so we need to be on the lookout for errors, still. Signed-off-by: H. Peter Anvin <hpa@zytor.com>
| | | | | | | | | | | | * | x86: ia32_signal: use {get|put}_user_try and catchHiroshi Shimamoto2009-01-231-170/+195
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Impact: use new framework Use {get|put}_user_try, catch, and _ex in arch/x86/ia32/ia32_signal.c. Note: this patch contains "WARNING: line over 80 characters", because when introducing new block I insert an indent to avoid mistakes by edit. Signed-off-by: Hiroshi Shimamoto <h-shimamoto@ct.jp.nec.com> Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
| | | | | | | | | | | | * | x86: signal: use {get|put}_user_try and catchHiroshi Shimamoto2009-01-231-137/+154
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Impact: use new framework Use {get|put}_user_try, catch, and _ex in arch/x86/kernel/signal.c. Note: this patch contains "WARNING: line over 80 characters", because when introducing new block I insert an indent to avoid mistakes by edit. Signed-off-by: Hiroshi Shimamoto <h-shimamoto@ct.jp.nec.com> Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
| | | | | | | | | | | | * | x86: uaccess: introduce try and catch frameworkHiroshi Shimamoto2009-01-233-0/+110
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Impact: introduce new uaccess exception handling framework Introduce {get|put}_user_try and {get|put}_user_catch as new uaccess exception handling framework. {get|put}_user_try begins exception block and {get|put}_user_catch(err) ends the block and gets err if an exception occured in {get|put}_user_ex() in the block. The exception is stored thread_info->uaccess_err. The example usage of this framework is below; int func() { int err = 0; get_user_try { get_user_ex(...); get_user_ex(...); : } get_user_catch(err); return err; } Note: get_user_ex() is not clear the value when an exception occurs, it's different from the behavior of __get_user(), but I think it doesn't matter. Signed-off-by: Hiroshi Shimamoto <h-shimamoto@ct.jp.nec.com> Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
| | | | | | | | | | | * | | x86, rdc321x: remove/move leftover filesIngo Molnar2009-01-186-329/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Impact: cleanup Move/remove leftover RDC321 files. Now that it's not a subarch anymore, arch/x86/mach-rdc321x and arch/x86/include/asm/mach-rdc321x/ are not needed. One include file was still in use: rdc321x_defs.h, move that to the generic x86 asm header directory. Signed-off-by: Ingo Molnar <mingo@elte.hu>
| | | | | | | | | | * | | | x86 setup: fix asm constraints in vesa_store_edidAndreas Schwab2009-01-271-6/+5
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Impact: fix potential miscompile (currently believed non-manifest) As the comment explains, the VBE DDC call can clobber any register. Tell the compiler about that fact. Signed-off-by: Andreas Schwab <schwab@suse.de> Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
| | | | | | | | | * | | | | x86 PAT: ioremap_wc should take resource_size_t parametervenkatesh.pallipadi@intel.com2009-01-222-2/+2
| | | | | | | | | | |/ / / | | | | | | | | | |/| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Impact: fix/extend ioremap_wc() beyond 4GB aperture on 32-bit ioremap_wc() was taking in unsigned long parameter, where as it should take 64-bit resource_size_t parameter like other ioremap variants. Signed-off-by: Venkatesh Pallipadi <venkatesh.pallipadi@intel.com> Signed-off-by: Suresh Siddha <suresh.b.siddha@intel.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
| | | | | | | | * | | | | x86: add pte_set_flags/clear_flags for pte flag manipulationJeremy Fitzhardinge2009-01-221-12/+26
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | It's not necessary to deconstruct and reconstruct a pte every time its flags are being updated. Introduce pte_set_flags and pte_clear_flags to set and clear flags in a pte. This allows the flag manipulation code to be inlined, and avoids calls via paravirt-ops. Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
| | | | | | | | * | | | | x86/pvops: remove pte_flags pvopJeremy Fitzhardinge2009-01-224-22/+1
| | | | | | | | |/ / / / | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | pte_flags() was introduced as a new pvop in order to extract just the flags portion of a pte, which is a potentially cheaper operation than extracting the page number as well. It turns out this operation is not needed, because simply using a mask to extract the flags from a pte is sufficient for all current users. Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
| | | | | | | * | | | | x86: optimise page fault entry, cleanupJohannes Weiner2009-01-211-1/+0
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | tsk is already assigned to current, drop the redundant second assignment. Signed-off-by: Johannes Weiner <hannes@cmpxchg.org> Signed-off-by: Ingo Molnar <mingo@elte.hu>
| | | | | | * | | | | | x86: headers cleanup - setup.hCyrill Gorcunov2009-01-141-5/+3
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Impact: cleanup 'make headers_check' warn us about leaking of kernel private (mostly compile time vars) data to userspace in headers. Fix it. Guard this one by __KERNEL__. Signed-off-by: Cyrill Gorcunov <gorcunov@openvz.org> Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
| | | | | | * | | | | | x86: headers cleanup - sigcontext32.hCyrill Gorcunov2009-01-141-0/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Impact: cleanup 'make headers_check' warn us about lack of linux/types.h here. Lets add it. Signed-off-by: Cyrill Gorcunov <gorcunov@openvz.org> Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
| | | | | | * | | | | | x86: headers cleanup - prctl.hCyrill Gorcunov2009-01-141-4/+0
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Impact: cleanup (internal kernel function exported) 'make headers_check' warn us about leaking of kernel private (mostly compile time vars) data to userspace in headers. Fix it. sys_arch_prctl is completely removed from header since frankly I don't even understand why we describe it here. It is described like __SYSCALL(__NR_arch_prctl, sys_arch_prctl) in unistd_64.h and implemented in process_64.c. User-mode linux involved? So this one in fact is suspicious. Signed-off-by: Cyrill Gorcunov <gorcunov@openvz.org> Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
| | | | | * | | | | | | Documentation/x86/boot.txt: modify fieldnameBaodong Chen2009-01-151-6/+7
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Modify field names to the right ones: - start_sys was changed to start_sys_seg - iinitrd_addr_max was changed to ramdisk_max - pad2 was changed to pad2 and pad3 - readmode_swtch was changed to realmode_swtch Signed-off-by: Baodong Chen <[email]chenbdchenbd@gmail.com[email]> Acked-by: Jiri Kosina <jkosina@suse.cz> Signed-off-by: Ingo Molnar <mingo@elte.hu>
| | | | * | | | | | | | x86: improve early fault/irq printoutIngo Molnar2009-01-261-1/+4
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Impact: add a stack dump to early IRQs/faults Signed-off-by: Ingo Molnar <mingo@elte.hu>
| | | | * | | | | | | | x86, debug: remove early_printk() #ifdefs from head_32.SIngo Molnar2009-01-261-8/+0
| | | | | |_|_|/ / / / | | | | |/| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Impact: cleanup Remove such constructs: #ifdef CONFIG_EARLY_PRINTK call early_printk #else call printk #endif Not only are they ugly, they are also pointless: a call to printk() maps to early_printk during early bootup anyway, if CONFIG_EARLY_PRINTK is enabled. Signed-off-by: Ingo Molnar <mingo@elte.hu>
| | | * | | | | | | | x86: filter CPU features dependent on unavailable CPUID levelsH. Peter Anvin2009-01-231-0/+47
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Impact: Fixes potential crashes on misconfigured systems. Some CPU features require specific CPUID levels to be available in order to function, as they contain information about the operation of a specific feature. However, some BIOSes and virtualization software provide the ability to mask CPUID levels in order to support legacy operating systems. We try to enable such CPUID levels when we know how to do it, but for the remaining cases, filter out such CPU features when there is no way for us to support them. Do this in one place, in the CPUID code, with a table-driven approach. Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
| | | * | | | | | | | x86: handle PAT more like other CPU featuresH. Peter Anvin2009-01-235-51/+32
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Impact: Cleanup When PAT was originally introduced, it was handled specially for a few reasons: - PAT bugs are hard to track down, so we wanted to maintain a whitelist of CPUs. - The i386 and x86-64 CPUID code was not yet unified. Both of these are now obsolete, so handle PAT like any other features, including ordinary feature blacklisting due to known bugs. Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
| | | * | | | | | | | x86: clean up stray space in <asm/processor.h>H. Peter Anvin2009-01-231-1/+1
| | | | |_|_|_|/ / / | | | |/| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Impact: Whitespace cleanup only Clean up a stray space character in arch/x86/include/asm/processor.h. Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
| | * | | | | | | | x86: cpu_init(): remove ugly #ifdef construct around debug register clearPeter Zijlstra2009-01-271-14/+11
| | | |_|_|_|_|/ / | | |/| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Impact: Cleanup While I was looking through the new and improved bootstrap code - great work that, thanks! I found the below a slight improvement. Remove unnecessary ugly #ifdef construct around debug register clear. Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl> Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
| | * | | | | | | x86: uaccess: rename __put_user_u64() to __put_user_asm_u64()Hiroshi Shimamoto2009-01-211-3/+3
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Impact: cleanup rename __put_user_u64() to __put_user_asm_u64() like __get_user_asm_u64(). Signed-off-by: Hiroshi Shimamoto <h-shimamoto@ct.jp.nec.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
| | * | | | | | | x86: uaccess: fix style problemsHiroshi Shimamoto2009-01-211-3/+3
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Impact: cleanup Fix coding style problems in arch/x86/include/asm/uaccess.h. Signed-off-by: Hiroshi Shimamoto <h-shimamoto@ct.jp.nec.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
| | * | | | | | | x86: remove byte locksJiri Kosina2009-01-203-76/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Impact: cleanup Remove byte locks implementation, which was introduced by Jeremy in 8efcbab6 ("paravirt: introduce a "lock-byte" spinlock implementation"), but turned out to be dead code that is not used by any in-kernel virtualization guest (Xen uses its own variant of spinlocks implementation and KVM is not planning to move to byte locks). Signed-off-by: Jiri Kosina <jkosina@suse.cz> Signed-off-by: Ingo Molnar <mingo@elte.hu>
| | * | | | | | | x86: Remove never-called arch_setup_msi_irq()Michael Ellerman2009-01-181-34/+0
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Since commit 75c46fa, "x64, x2apic/intr-remap: MSI and MSI-X support for interrupt remapping infrastructure", x86 has had an implementation of arch_setup_msi_irqs(). That implementation does not call arch_setup_msi_irq(), instead it calls setup_irq(). No other x86 code calls arch_setup_msi_irq(). That leaves only arch_setup_msi_irqs() in drivers/pci/msi.c, but that routine is overridden by the x86 version of arch_setup_msi_irqs(). So arch_setup_msi_irq() is dead code, remove it. Signed-off-by: Michael Ellerman <michael@ellerman.id.au> Signed-off-by: H. Peter Anvin <hpa@zytor.com>
| * | | | | | | | x86: micro-optimize __raw_read_trylock()Frederic Weisbecker2009-01-261-2/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The current version of __raw_read_trylock starts with decrementing the lock and read its new value as a separate operation after that. That makes 3 dereferences (read, write (after sub), read) whereas a single atomic_dec_return does only two pointers dereferences (read, write). Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
| * | | | | | | | x86-64: remove locked instruction from switch_to()Benjamin LaHaise2009-01-112-3/+5
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Impact: micro-optimization The patch below removes an unnecessary locked instruction from switch_to(). TIF_FORK is only ever set in copy_thread() on initial process creation, and gets cleared during the first scheduling of the process. As such, it is safe to use an unlocked test for the flag within switch_to(). Signed-off-by: Benjamin LaHaise <bcrl@kvack.org> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* | | | | | | | | Merge branch 'core/percpu' into x86/coreIngo Molnar2009-01-28168-2342/+2309
|\ \ \ \ \ \ \ \ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Conflicts: kernel/irq/handle.c
| * \ \ \ \ \ \ \ \ Merge branch 'tj-percpu' of ↵Ingo Molnar2009-01-2713-383/+323
| |\ \ \ \ \ \ \ \ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/tj/misc into core/percpu Conflicts: arch/x86/kernel/setup_percpu.c Semantic conflict: arch/x86/kernel/cpu/common.c Signed-off-by: Ingo Molnar <mingo@elte.hu>
| | * | | | | | | | | x86: clean up indentation in setup_per_cpu_areas()Tejun Heo2009-01-271-7/+10
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Impact: cosmetic cleanup Signed-off-by: Tejun Heo <tj@kernel.org>
| | * | | | | | | | | x86: fix build breakage on voyageJames Bottomley2009-01-271-0/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Impact: build fix x86_cpu_to_apicid and x86_bios_cpu_apicid aren't defined for voyage. Earlier patch forgot to conditionalize early percpu clearing. Fix it. Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com> Signed-off-by: Tejun Heo <tj@kernel.org>
| | * | | | | | | | | x86: load new GDT after setting up boot cpu per-cpu areaBrian Gerst2009-01-273-14/+12
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Impact: sync 32 and 64-bit code Merge load_gs_base() into switch_to_new_gdt(). Load the GDT and per-cpu state for the boot cpu when its new area is set up. Signed-off-by: Brian Gerst <brgerst@gmail.com> Signed-off-by: Tejun Heo <tj@kernel.org>
| | * | | | | | | | | x86: remove extra barriers from load_gs_base()Brian Gerst2009-01-271-3/+0
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Impact: optimization mb() generates an mfence instruction, which is not needed here. Only a compiler barrier is needed, and that is handled by the memory clobber in the wrmsrl function. Signed-off-by: Brian Gerst <brgerst@gmail.com> Signed-off-by: Tejun Heo <tj@kernel.org>
generated by cgit (git 2.34.1) at 2024-11-08 18:29:33 +0000