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* KVM: SVM: Add tracepoint for skinit instructionJoerg Roedel2009-12-033-1/+32
| | | | | | | | | | | This patch adds a tracepoint for the event that the guest executed the SKINIT instruction. This information is important because SKINIT is an SVM extenstion not yet implemented by nested SVM and we may need this information for debugging hypervisors that do not yet run on nested SVM. Signed-off-by: Joerg Roedel <joerg.roedel@amd.com> Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
* KVM: SVM: Add tracepoint for invlpga instructionJoerg Roedel2009-12-033-0/+27
| | | | | | | | This patch adds a tracepoint for the event that the guest executed the INVLPGA instruction. Signed-off-by: Joerg Roedel <joerg.roedel@amd.com> Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
* KVM: SVM: Add tracepoint for #vmexit because intr pendingJoerg Roedel2009-12-033-1/+20
| | | | | | | | | This patch adds a special tracepoint for the event that a nested #vmexit is injected because kvm wants to inject an interrupt into the guest. Signed-off-by: Joerg Roedel <joerg.roedel@amd.com> Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
* KVM: SVM: Add tracepoint for injected #vmexitJoerg Roedel2009-12-033-0/+40
| | | | | | | | This patch adds a tracepoint for a nested #vmexit that gets re-injected to the guest. Signed-off-by: Joerg Roedel <joerg.roedel@amd.com> Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
* KVM: SVM: Add tracepoint for nested #vmexitJoerg Roedel2009-12-033-0/+43
| | | | | | | | This patch adds a tracepoint for every #vmexit we get from a nested guest. Signed-off-by: Joerg Roedel <joerg.roedel@amd.com> Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
* KVM: SVM: Add tracepoint for nested vmrunJoerg Roedel2009-12-033-0/+40
| | | | | | | | This patch adds a dedicated kvm tracepoint for a nested vmrun. Signed-off-by: Joerg Roedel <joerg.roedel@amd.com> Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
* KVM: SVM: Move INTR vmexit out of atomic codeJoerg Roedel2009-12-031-1/+25
| | | | | | | | | | | | The nested SVM code emulates a #vmexit caused by a request to open the irq window right in the request function. This is a bug because the request function runs with preemption and interrupts disabled but the #vmexit emulation might sleep. This can cause a schedule()-while-atomic bug and is fixed with this patch. Signed-off-by: Joerg Roedel <joerg.roedel@amd.com> Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
* KVM: SVM: Notify nested hypervisor of lost event injectionsAlexander Graf2009-12-031-0/+16
| | | | | | | | | | | | | If event_inj is valid on a #vmexit the host CPU would write the contents to exit_int_info, so the hypervisor knows that the event wasn't injected. We don't do this in nested SVM by now which is a bug and fixed by this patch. Signed-off-by: Alexander Graf <agraf@suse.de> Signed-off-by: Joerg Roedel <joerg.roedel@amd.com> Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
* KVM: x86: include pvclock MSRs in msrs_to_saveGlauber Costa2009-12-031-4/+8
| | | | | | | | | | | | | For a while now, we are issuing a rdmsr instruction to find out which msrs in our save list are really supported by the underlying machine. However, it fails to account for kvm-specific msrs, such as the pvclock ones. This patch moves then to the beginning of the list, and skip testing them. Cc: stable@kernel.org Signed-off-by: Glauber Costa <glommer@redhat.com> Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
* KVM: x86: Rework guest single-step flag injection and filteringJan Kiszka2009-12-032-32/+48
| | | | | | | | | Push TF and RF injection and filtering on guest single-stepping into the vender get/set_rflags callbacks. This makes the whole mechanism more robust wrt user space IOCTL order and instruction emulations. Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com> Signed-off-by: Avi Kivity <avi@redhat.com>
* KVM: x86: disable paravirt mmu reportingMarcelo Tosatti2009-12-031-2/+2
| | | | | | | | | | | Disable paravirt MMU capability reporting, so that new (or rebooted) guests switch to native operation. Paravirt MMU is a burden to maintain and does not bring significant advantages compared to shadow anymore. Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com> Signed-off-by: Avi Kivity <avi@redhat.com>
* KVM: x86: Refactor guest debug IOCTL handlingJan Kiszka2009-12-034-38/+26
| | | | | | | | | Much of so far vendor-specific code for setting up guest debug can actually be handled by the generic code. This also fixes a minor deficit in the SVM part /wrt processing KVM_GUESTDBG_ENABLE. Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com> Signed-off-by: Avi Kivity <avi@redhat.com>
* KVM: remove pre_task_link setting in save_state_to_tss16Juan Quintela2009-12-031-1/+0
| | | | | | | | | | | | | | Now, also remove pre_task_link setting in save_state_to_tss16. commit b237ac37a149e8b56436fabf093532483bff13b0 Author: Gleb Natapov <gleb@redhat.com> Date: Mon Mar 30 16:03:24 2009 +0300 KVM: Fix task switch back link handling. CC: Gleb Natapov <gleb@redhat.com> Signed-off-by: Juan Quintela <quintela@redhat.com> Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
* KVM: Fix hotplug of CPUsZachary Amsden2009-12-032-4/+6
| | | | | | | | | | | Both VMX and SVM require per-cpu memory allocation, which is done at module init time, for only online cpus. Backend was not allocating enough structure for all possible CPUs, so new CPUs coming online could not be hardware enabled. Signed-off-by: Zachary Amsden <zamsden@redhat.com> Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
* KVM: Fix printk name error in svm.cZachary Amsden2009-12-031-2/+3
| | | | | Signed-off-by: Zachary Amsden <zamsden@redhat.com> Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
* KVM: Kill the confusing tsc_ref_khz and ref_freq variablesZachary Amsden2009-12-031-10/+16
| | | | | | | | | | | | | | | | | | They are globals, not clearly protected by any ordering or locking, and vulnerable to various startup races. Instead, for variable TSC machines, register the cpufreq notifier and get the TSC frequency directly from the cpufreq machinery. Not only is it always right, it is also perfectly accurate, as no error prone measurement is required. On such machines, when a new CPU online is brought online, it isn't clear what frequency it will start with, and it may not correspond to the reference, thus in hardware_enable we clear the cpu_tsc_khz variable to zero and make sure it is set before running on a VCPU. Signed-off-by: Zachary Amsden <zamsden@redhat.com> Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
* KVM: Separate timer intialization into an indepedent functionZachary Amsden2009-12-031-8/+15
| | | | | Signed-off-by: Zachary Amsden <zamsden@redhat.com> Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
* KVM: fix lock imbalance in kvm_*_irq_source_id()Jiri Slaby2009-12-031-2/+5
| | | | | | | | | | | | Stanse found 2 lock imbalances in kvm_request_irq_source_id and kvm_free_irq_source_id. They omit to unlock kvm->irq_lock on fail paths. Fix that by adding unlock labels at the end of the functions and jump there from the fail paths. Signed-off-by: Jiri Slaby <jirislaby@gmail.com> Cc: Marcelo Tosatti <mtosatti@redhat.com> Signed-off-by: Avi Kivity <avi@redhat.com>
* KVM: SVM: Remove remaining occurences of rdtscllJoerg Roedel2009-12-031-4/+3
| | | | | | | | | This patch replaces them with native_read_tsc() which can also be used in expressions and saves a variable on the stack in this case. Signed-off-by: Joerg Roedel <joerg.roedel@amd.com> Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
* KVM: SVM: don't copy exit_int_info on nested vmrunJoerg Roedel2009-12-031-2/+0
| | | | | | | | | The exit_int_info field is only written by the hardware and never read. So it does not need to be copied on a vmrun emulation. Signed-off-by: Joerg Roedel <joerg.roedel@amd.com> Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
* KVM: SVM: reorganize svm_interrupt_allowedJoerg Roedel2009-12-031-4/+12
| | | | | | | | | This patch reorganizes the logic in svm_interrupt_allowed to make it better to read. This is important because the logic is a lot more complicated with Nested SVM. Signed-off-by: Joerg Roedel <joerg.roedel@amd.com> Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
* KVM: remove duplicated #includeHuang Weiyi2009-12-031-1/+0
| | | | | | | | Remove duplicated #include('s) in arch/x86/kvm/lapic.c Signed-off-by: Huang Weiyi <weiyi.huang@gmail.com> Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
* KVM: Activate Virtualization On DemandAlexander Graf2009-12-039-28/+108
| | | | | | | | | | | | | | | | | | | | | | | X86 CPUs need to have some magic happening to enable the virtualization extensions on them. This magic can result in unpleasant results for users, like blocking other VMMs from working (vmx) or using invalid TLB entries (svm). Currently KVM activates virtualization when the respective kernel module is loaded. This blocks us from autoloading KVM modules without breaking other VMMs. To circumvent this problem at least a bit, this patch introduces on demand activation of virtualization. This means, that instead virtualization is enabled on creation of the first virtual machine and disabled on destruction of the last one. So using this, KVM can be easily autoloaded, while keeping other hypervisors usable. Signed-off-by: Alexander Graf <agraf@suse.de> Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com> Signed-off-by: Avi Kivity <avi@redhat.com>
* KVM: SVM: remove needless mmap_sem acquision from nested_svm_mapMarcelo Tosatti2009-12-031-3/+0
| | | | | | | | | nested_svm_map unnecessarily takes mmap_sem around gfn_to_page, since gfn_to_page / get_user_pages are responsible for it. Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com> Acked-by: Alexander Graf <agraf@suse.de> Signed-off-by: Avi Kivity <avi@redhat.com>
* KVM: VMX: Enhance invalid guest state emulationMohammed Gamal2009-12-031-24/+20
| | | | | | | | | - Change returned handle_invalid_guest_state() to return relevant exit codes - Move triggering the emulation from vmx_vcpu_run() to vmx_handle_exit() - Return to userspace instead of repeatedly trying to emulate instructions that have already failed Signed-off-by: Mohammed Gamal <m.gamal005@gmail.com> Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
* KVM: x86 emulator: Add pusha and popa instructionsMohammed Gamal2009-12-031-1/+47
| | | | | | | | | | | This adds pusha and popa instructions (opcodes 0x60-0x61), this enables booting MINIX with invalid guest state emulation on. [marcelo: remove unused variable] Signed-off-by: Mohammed Gamal <m.gamal005@gmail.com> Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com> Signed-off-by: Avi Kivity <avi@redhat.com>
* KVM: x86 emulator: Add missing decoder flags for 'or' instructionsMohammed Gamal2009-12-031-1/+2
| | | | | | | Add missing decoder flags for or instructions (0xc-0xd). Signed-off-by: Mohammed Gamal <m.gamal005@gmail.com> Signed-off-by: Avi Kivity <avi@redhat.com>
* KVM: Move assigned device code to own fileAvi Kivity2009-12-035-798/+840
| | | | Signed-off-by: Avi Kivity <avi@redhat.com>
* KVM: Return -ENOTTY on unrecognized ioctlsAvi Kivity2009-12-034-4/+4
| | | | | | Not the incorrect -EINVAL. Signed-off-by: Avi Kivity <avi@redhat.com>
* KVM: Drop kvm->irq_lock lock from irq injection pathGleb Natapov2009-12-037-17/+1
| | | | | | | | | | The only thing it protects now is interrupt injection into lapic and this can work lockless. Even now with kvm->irq_lock in place access to lapic is not entirely serialized since vcpu access doesn't take kvm->irq_lock. Signed-off-by: Gleb Natapov <gleb@redhat.com> Signed-off-by: Avi Kivity <avi@redhat.com>
* KVM: Move IO APIC to its own lockGleb Natapov2009-12-037-51/+100
| | | | | | | The allows removal of irq_lock from the injection path. Signed-off-by: Gleb Natapov <gleb@redhat.com> Signed-off-by: Avi Kivity <avi@redhat.com>
* KVM: Convert irq notifiers lists to RCU lockingGleb Natapov2009-12-031-10/+12
| | | | | | | Use RCU locking for mask/ack notifiers lists. Signed-off-by: Gleb Natapov <gleb@redhat.com> Signed-off-by: Avi Kivity <avi@redhat.com>
* KVM: Move irq ack notifier list to arch independent codeGleb Natapov2009-12-035-5/+4
| | | | | | | Mask irq notifier list is already there. Signed-off-by: Gleb Natapov <gleb@redhat.com> Signed-off-by: Avi Kivity <avi@redhat.com>
* KVM: Move irq routing data structure to rcu lockingGleb Natapov2009-12-031-5/+11
| | | | | Signed-off-by: Gleb Natapov <gleb@redhat.com> Signed-off-by: Avi Kivity <avi@redhat.com>
* KVM: Maintain back mapping from irqchip/pin to gsiGleb Natapov2009-12-034-17/+25
| | | | | | | | | | Maintain back mapping from irqchip/pin to gsi to speedup interrupt acknowledgment notifications. [avi: build fix on non-x86/ia64] Signed-off-by: Gleb Natapov <gleb@redhat.com> Signed-off-by: Avi Kivity <avi@redhat.com>
* KVM: Change irq routing table to use gsi indexed arrayGleb Natapov2009-12-033-39/+71
| | | | | | | | Use gsi indexed array instead of scanning all entries on each interrupt injection. Signed-off-by: Gleb Natapov <gleb@redhat.com> Signed-off-by: Avi Kivity <avi@redhat.com>
* KVM: Move irq sharing information to irqchip levelGleb Natapov2009-12-035-25/+39
| | | | | | | | | | This removes assumptions that max GSIs is smaller than number of pins. Sharing is tracked on pin level not GSI level. [avi: no PIC on ia64] Signed-off-by: Gleb Natapov <gleb@redhat.com> Signed-off-by: Avi Kivity <avi@redhat.com>
* KVM: Call pic_clear_isr() on pic reset to reuse logic thereGleb Natapov2009-12-031-13/+9
| | | | | | | Also move call of ack notifiers after pic state change. Signed-off-by: Gleb Natapov <gleb@redhat.com> Signed-off-by: Avi Kivity <avi@redhat.com>
* KVM: Don't pass kvm_run argumentsAvi Kivity2009-12-036-142/+141
| | | | | | They're just copies of vcpu->run, which is readily accessible. Signed-off-by: Avi Kivity <avi@redhat.com>
* KVM: x86 emulator: Introduce No64 decode optionMohammed Gamal2009-12-031-28/+14
| | | | | | | | Introduces a new decode option "No64", which is used for instructions that are invalid in long mode. Signed-off-by: Mohammed Gamal <m.gamal005@gmail.com> Signed-off-by: Avi Kivity <avi@redhat.com>
* KVM: x86 emulator: Add 'push/pop sreg' instructionsMohammed Gamal2009-12-031-6/+101
| | | | | | | [avi: avoid buffer overflow] Signed-off-by: Mohammed Gamal <m.gamal005@gmail.com> Signed-off-by: Avi Kivity <avi@redhat.com>
* KVM: Don't wrap schedule() with vcpu_put()/vcpu_load()Avi Kivity2009-12-031-2/+0
| | | | | | Preemption notifiers will do that for us automatically. Signed-off-by: Avi Kivity <avi@redhat.com>
* Merge remote branch 'tip/x86/entry' into kvm-updates/2.6.33Avi Kivity2009-12-039-2/+119
|\ | | | | | | Signed-off-by: Avi Kivity <avi@redhat.com>
| * core: Fix user return notifier on fork()Avi Kivity2009-11-292-0/+9
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | fork() clones all thread_info flags, including TIF_USER_RETURN_NOTIFY; if the new task is first scheduled on a cpu which doesn't have user return notifiers set, this causes user return notifiers to trigger without any way of clearing itself. This is easy to trigger with a forky workload on the host in parallel with kvm, resulting in a cpu in an endless loop on the verge of returning to userspace. Fix by dropping the TIF_USER_RETURN_NOTIFY immediately after fork. Signed-off-by: Avi Kivity <avi@redhat.com> LKML-Reference: <1259505288-16559-1-git-send-email-avi@redhat.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
| * x86: Fix user return notifier put_cpu_var() invocationStephen Rothwell2009-11-021-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Today's linux-next build (x86_64 allmodconfig) failed like this: kernel/user-return-notifier.c: In function 'fire_user_return_notifiers': kernel/user-return-notifier.c:45: error: expected expression before ')' token Introduced by commit 7c68af6e32c73992bad24107311f3433c89016e2 ("core, x86: Add user return notifiers") from the tip and kvm trees but revealed by commit e0fdb0e050eae331046385643618f12452aa7e73 ("percpu: add __percpu for sparse") from the percpu tree. Before that percpu tree commit, "put_cpu_var()" would compile without error (even though it really needs a parameter). Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au> Cc: Avi Kivity <avi@redhat.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Tejun Heo <tj@kernel.org> Cc: Rusty Russell <rusty@rustcorp.com.au> Cc: Christoph Lameter <cl@linux-foundation.org> LKML-Reference: <20091102161722.eea4358d.sfr@canb.auug.org.au> Signed-off-by: Ingo Molnar <mingo@elte.hu>
| * x86: Fix user return notifier buildAvi Kivity2009-10-251-0/+1
| | | | | | | | | | | | | | | | | | When CONFIG_USER_RETURN_NOTIFIER is set, we need to link kernel/user-return-notifier.o. Signed-off-by: Avi Kivity <avi@redhat.com> LKML-Reference: <1256473485-23109-1-git-send-email-avi@redhat.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
| * core, x86: Add user return notifiersAvi Kivity2009-10-017-2/+109
| | | | | | | | | | | | | | | | | | | | | | | | | | | | Add a general per-cpu notifier that is called whenever the kernel is about to return to userspace. The notifier uses a thread_info flag and existing checks, so there is no impact on user return or context switch fast paths. This will be used initially to speed up KVM task switching by lazily updating MSRs. Signed-off-by: Avi Kivity <avi@redhat.com> LKML-Reference: <1253342422-13811-1-git-send-email-avi@redhat.com> Signed-off-by: H. Peter Anvin <hpa@zytor.com>
* | Linux 2.6.32v2.6.32Linus Torvalds2009-12-021-1/+1
| |
* | VIDEO: Correct use of request_region/request_mem_regionJulia Lawall2009-12-021-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | request_region should be used with release_region, not request_mem_region. Geert Uytterhoeven pointed out that in the case of drivers/video/gbefb.c, the problem is actually the other way around; request_mem_region should be used instead of request_region. The semantic patch that finds/fixes this problem is as follows: (http://coccinelle.lip6.fr/) // <smpl> @r1@ expression start; @@ request_region(start,...) @b1@ expression r1.start; @@ request_mem_region(start,...) @depends on !b1@ expression r1.start; expression E; @@ - release_mem_region + release_region (start,E) // </smpl> Signed-off-by: Julia Lawall <julia@diku.dk> Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
* | SPI: spi_txx9: Fix bit rate calculationAtsushi Nemoto2009-12-021-7/+6
| | | | | | | | | | | | | | | | | | TXx9 SPI bit rate is calculated by: fBR = (spi-baseclk) / (n + 1) Fix calculation of min_speed_hz, max_speed_hz and n. Signed-off-by: Atsushi Nemoto <anemo@mba.ocn.ne.jp> Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
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