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* KVM: x86: Call vcpu_load and vcpu_put in cpuid_updateDongxiao Xu2010-05-13
| | | | | | | | cpuid_update may operate VMCS, so vcpu_load() and vcpu_put() should be called to ensure correctness. Signed-off-by: Dongxiao Xu <dongxiao.xu@intel.com> Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
* KVM: SVM: Fix wrong intercept masks on 32 bitJoerg Roedel2010-05-13
| | | | | | | | | | | | | | | This patch makes KVM on 32 bit SVM working again by correcting the masks used for iret interception. With the wrong masks the upper 32 bits of the intercepts are masked out which leaves vmrun unintercepted. This is not legal on svm and the vmrun fails. Bug was introduced by commits 95ba827313 and 3cfc3092. Cc: Jan Kiszka <jan.kiszka@siemens.com> Cc: Gleb Natapov <gleb@redhat.com> Cc: stable@kernel.org Signed-off-by: Joerg Roedel <joerg.roedel@amd.com> Signed-off-by: Avi Kivity <avi@redhat.com>
* KVM: x86: Fix TSS size check for 16-bit tasksJan Kiszka2010-04-21
| | | | | | | | A 16-bit TSS is only 44 bytes long. So make sure to test for the correct size on task switch. Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com> Signed-off-by: Avi Kivity <avi@redhat.com>
* KVM: fix the handling of dirty bitmaps to avoid overflowsTakuya Yoshikawa2010-04-20
| | | | | | | | | | | | | Int is not long enough to store the size of a dirty bitmap. This patch fixes this problem with the introduction of a wrapper function to calculate the sizes of dirty bitmaps. Note: in mark_page_dirty(), we have to consider the fact that __set_bit() takes the offset as int, not long. Signed-off-by: Takuya Yoshikawa <yoshikawa.takuya@oss.ntt.co.jp> Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
* KVM: MMU: fix kvm_mmu_zap_page() and its calling pathXiao Guangrong2010-04-20
| | | | | | | | | | | | This patch fix: - calculate zapped page number properly in mmu_zap_unsync_children() - calculate freeed page number properly kvm_mmu_change_mmu_pages() - if zapped children page it shoud restart hlist walking KVM-Stable-Tag. Signed-off-by: Xiao Guangrong <xiaoguangrong@cn.fujitsu.com> Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
* KVM: VMX: Save/restore rflags.vm correctly in real modeAvi Kivity2010-04-20
| | | | | | | | | | | | | | | | | | Currently we set eflags.vm unconditionally when entering real mode emulation through virtual-8086 mode, and clear it unconditionally when we enter protected mode. The means that the following sequence KVM_SET_REGS (rflags.vm=1) KVM_SET_SREGS (cr0.pe=1) Ends up with rflags.vm clear due to KVM_SET_SREGS triggering enter_pmode(). Fix by shadowing rflags.vm (and rflags.iopl) correctly while in real mode: reads and writes to those bits access a shadow register instead of the actual register. Signed-off-by: Avi Kivity <avi@redhat.com> Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
* KVM: allow bit 10 to be cleared in MSR_IA32_MC4_CTLAndre Przywara2010-04-20
| | | | | | | | | | | | | | There is a quirk for AMD K8 CPUs in many Linux kernels (see arch/x86/kernel/cpu/mcheck/mce.c:__mcheck_cpu_apply_quirks()) that clears bit 10 in that MCE related MSR. KVM can only cope with all zeros or all ones, so it will inject a #GP into the guest, which will let it panic. So lets add a quirk to the quirk and ignore this single cleared bit. This fixes -cpu kvm64 on all machines and -cpu host on K8 machines with some guest Linux kernels. Signed-off-by: Andre Przywara <andre.przywara@amd.com> Signed-off-by: Avi Kivity <avi@redhat.com>
* KVM: Don't spam kernel log when injecting exceptions due to bad cr writesAvi Kivity2010-04-20
| | | | | | These are guest-triggerable. Signed-off-by: Avi Kivity <avi@redhat.com>
* KVM: SVM: Fix memory leaks that happen when svm_create_vcpu() failsTakuya Yoshikawa2010-04-20
| | | | | | | | svm_create_vcpu() does not free the pages allocated during the creation when it fails to complete the allocations. This patch fixes it. Signed-off-by: Takuya Yoshikawa <yoshikawa.takuya@oss.ntt.co.jp> Signed-off-by: Avi Kivity <avi@redhat.com>
* KVM: take srcu lock before call to complete_pio()Gleb Natapov2010-04-20
| | | | | | | | complete_pio() may use slot table which is protected by srcu. Signed-off-by: Gleb Natapov <gleb@redhat.com> Cc: stable@kernel.org Signed-off-by: Avi Kivity <avi@redhat.com>
* include cleanup: Update gfp.h and slab.h includes to prepare for breaking ↵Tejun Heo2010-03-30
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | implicit slab.h inclusion from percpu.h percpu.h is included by sched.h and module.h and thus ends up being included when building most .c files. percpu.h includes slab.h which in turn includes gfp.h making everything defined by the two files universally available and complicating inclusion dependencies. percpu.h -> slab.h dependency is about to be removed. Prepare for this change by updating users of gfp and slab facilities include those headers directly instead of assuming availability. As this conversion needs to touch large number of source files, the following script is used as the basis of conversion. http://userweb.kernel.org/~tj/misc/slabh-sweep.py The script does the followings. * Scan files for gfp and slab usages and update includes such that only the necessary includes are there. ie. if only gfp is used, gfp.h, if slab is used, slab.h. * When the script inserts a new include, it looks at the include blocks and try to put the new include such that its order conforms to its surrounding. It's put in the include block which contains core kernel includes, in the same order that the rest are ordered - alphabetical, Christmas tree, rev-Xmas-tree or at the end if there doesn't seem to be any matching order. * If the script can't find a place to put a new include (mostly because the file doesn't have fitting include block), it prints out an error message indicating which .h file needs to be added to the file. The conversion was done in the following steps. 1. The initial automatic conversion of all .c files updated slightly over 4000 files, deleting around 700 includes and adding ~480 gfp.h and ~3000 slab.h inclusions. The script emitted errors for ~400 files. 2. Each error was manually checked. Some didn't need the inclusion, some needed manual addition while adding it to implementation .h or embedding .c file was more appropriate for others. This step added inclusions to around 150 files. 3. The script was run again and the output was compared to the edits from #2 to make sure no file was left behind. 4. Several build tests were done and a couple of problems were fixed. e.g. lib/decompress_*.c used malloc/free() wrappers around slab APIs requiring slab.h to be added manually. 5. The script was run on all .h files but without automatically editing them as sprinkling gfp.h and slab.h inclusions around .h files could easily lead to inclusion dependency hell. Most gfp.h inclusion directives were ignored as stuff from gfp.h was usually wildly available and often used in preprocessor macros. Each slab.h inclusion directive was examined and added manually as necessary. 6. percpu.h was updated not to include slab.h. 7. Build test were done on the following configurations and failures were fixed. CONFIG_GCOV_KERNEL was turned off for all tests (as my distributed build env didn't work with gcov compiles) and a few more options had to be turned off depending on archs to make things build (like ipr on powerpc/64 which failed due to missing writeq). * x86 and x86_64 UP and SMP allmodconfig and a custom test config. * powerpc and powerpc64 SMP allmodconfig * sparc and sparc64 SMP allmodconfig * ia64 SMP allmodconfig * s390 SMP allmodconfig * alpha SMP allmodconfig * um on x86_64 SMP allmodconfig 8. percpu.h modifications were reverted so that it could be applied as a separate patch and serve as bisection point. Given the fact that I had only a couple of failures from tests on step 6, I'm fairly confident about the coverage of this conversion patch. If there is a breakage, it's likely to be something in one of the arch headers which should be easily discoverable easily on most builds of the specific arch. Signed-off-by: Tejun Heo <tj@kernel.org> Guess-its-ok-by: Christoph Lameter <cl@linux-foundation.org> Cc: Ingo Molnar <mingo@redhat.com> Cc: Lee Schermerhorn <Lee.Schermerhorn@hp.com>
* Merge branch 'kvm-updates/2.6.34' of git://git.kernel.org/pub/scm/virt/kvm/kvmLinus Torvalds2010-03-05
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | * 'kvm-updates/2.6.34' of git://git.kernel.org/pub/scm/virt/kvm/kvm: (145 commits) KVM: x86: Add KVM_CAP_X86_ROBUST_SINGLESTEP KVM: VMX: Update instruction length on intercepted BP KVM: Fix emulate_sys[call, enter, exit]()'s fault handling KVM: Fix segment descriptor loading KVM: Fix load_guest_segment_descriptor() to inject page fault KVM: x86 emulator: Forbid modifying CS segment register by mov instruction KVM: Convert kvm->requests_lock to raw_spinlock_t KVM: Convert i8254/i8259 locks to raw_spinlocks KVM: x86 emulator: disallow opcode 82 in 64-bit mode KVM: x86 emulator: code style cleanup KVM: Plan obsolescence of kernel allocated slots, paravirt mmu KVM: x86 emulator: Add LOCK prefix validity checking KVM: x86 emulator: Check CPL level during privilege instruction emulation KVM: x86 emulator: Fix popf emulation KVM: x86 emulator: Check IOPL level during io instruction emulation KVM: x86 emulator: fix memory access during x86 emulation KVM: x86 emulator: Add Virtual-8086 mode of emulation KVM: x86 emulator: Add group9 instruction decoding KVM: x86 emulator: Add group8 instruction decoding KVM: do not store wqh in irqfd ... Trivial conflicts in Documentation/feature-removal-schedule.txt
| * KVM: x86: Add KVM_CAP_X86_ROBUST_SINGLESTEPJan Kiszka2010-03-01
| | | | | | | | | | | | | | | | | | | | This marks the guest single-step API improvement of 94fe45da and 91586a3b with a capability flag to allow reliable detection by user space. Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com> Cc: stable@kernel.org (2.6.33) Signed-off-by: Avi Kivity <avi@redhat.com>
| * KVM: VMX: Update instruction length on intercepted BPJan Kiszka2010-03-01
| | | | | | | | | | | | | | | | | | | | | | | | We intercept #BP while in guest debugging mode. As VM exits due to intercepted exceptions do not necessarily come with valid idt_vectoring, we have to update event_exit_inst_len explicitly in such cases. At least in the absence of migration, this ensures that re-injections of #BP will find and use the correct instruction length. Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com> Cc: stable@kernel.org (2.6.32, 2.6.33) Signed-off-by: Avi Kivity <avi@redhat.com>
| * KVM: Fix emulate_sys[call, enter, exit]()'s fault handlingTakuya Yoshikawa2010-03-01
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This patch fixes emulate_syscall(), emulate_sysenter() and emulate_sysexit() to handle injected faults properly. Even though original code injects faults in these functions, we cannot handle these unless we use the different return value from the UNHANDLEABLE case. So this patch use X86EMUL_* codes instead of -1 and 0 and makes x86_emulate_insn() to handle these propagated faults. Be sure that, in x86_emulate_insn(), goto cannot_emulate and goto done with rc equals X86EMUL_UNHANDLEABLE have same effect. Signed-off-by: Takuya Yoshikawa <yoshikawa.takuya@oss.ntt.co.jp> Signed-off-by: Gleb Natapov <gleb@redhat.com> Signed-off-by: Avi Kivity <avi@redhat.com>
| * KVM: Fix segment descriptor loadingGleb Natapov2010-03-01
| | | | | | | | | | | | | | | | | | | | | | Add proper error and permission checking. This patch also change task switching code to load segment selectors before segment descriptors, like SDM requires, otherwise permission checking during segment descriptor loading will be incorrect. Cc: stable@kernel.org (2.6.33, 2.6.32) Signed-off-by: Gleb Natapov <gleb@redhat.com> Signed-off-by: Avi Kivity <avi@redhat.com>
| * KVM: Fix load_guest_segment_descriptor() to inject page faultTakuya Yoshikawa2010-03-01
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This patch injects page fault when reading descriptor in load_guest_segment_descriptor() fails with FAULT. Effects of this injection: This function is used by kvm_load_segment_descriptor() which is necessary for the following instructions: - mov seg,r/m16 - jmp far - pop ?s This patch makes it possible to emulate the page faults generated by these instructions. But be sure that unless we change the kvm_load_segment_descriptor()'s ret value propagation this patch has no effect. Signed-off-by: Takuya Yoshikawa <yoshikawa.takuya@oss.ntt.co.jp> Signed-off-by: Gleb Natapov <gleb@redhat.com> Signed-off-by: Avi Kivity <avi@redhat.com>
| * KVM: x86 emulator: Forbid modifying CS segment register by mov instructionGleb Natapov2010-03-01
| | | | | | | | | | | | | | | | | | Inject #UD if guest attempts to do so. This is in accordance to Intel SDM. Cc: stable@kernel.org (2.6.33, 2.6.32) Signed-off-by: Gleb Natapov <gleb@redhat.com> Signed-off-by: Avi Kivity <avi@redhat.com>
| * KVM: Convert i8254/i8259 locks to raw_spinlocksThomas Gleixner2010-03-01
| | | | | | | | | | | | | | | | The i8254/i8259 locks need to be real spinlocks on preempt-rt. Convert them to raw_spinlock. No change for !RT kernels. Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Avi Kivity <avi@redhat.com>
| * KVM: x86 emulator: disallow opcode 82 in 64-bit modeGleb Natapov2010-03-01
| | | | | | | | | | | | | | Instructions with opcode 82 are not valid in 64 bit mode. Signed-off-by: Gleb Natapov <gleb@redhat.com> Signed-off-by: Avi Kivity <avi@redhat.com>
| * KVM: x86 emulator: code style cleanupWei Yongjun2010-03-01
| | | | | | | | | | | | | | Just remove redundant semicolon. Signed-off-by: Wei Yongjun <yjwei@cn.fujitsu.com> Signed-off-by: Avi Kivity <avi@redhat.com>
| * KVM: x86 emulator: Add LOCK prefix validity checkingGleb Natapov2010-03-01
| | | | | | | | | | | | | | | | | | | | Instructions which are not allowed to have LOCK prefix should generate #UD if one is used. [avi: fold opcode 82 fix from another patch] Signed-off-by: Gleb Natapov <gleb@redhat.com> Signed-off-by: Avi Kivity <avi@redhat.com>
| * KVM: x86 emulator: Check CPL level during privilege instruction emulationGleb Natapov2010-03-01
| | | | | | | | | | | | | | | | | | Add CPL checking in case emulator is tricked into emulating privilege instruction from userspace. Signed-off-by: Gleb Natapov <gleb@redhat.com> Cc: stable@kernel.org Signed-off-by: Avi Kivity <avi@redhat.com>
| * KVM: x86 emulator: Fix popf emulationGleb Natapov2010-03-01
| | | | | | | | | | | | | | | | | | POPF behaves differently depending on current CPU mode. Emulate correct logic to prevent guest from changing flags that it can't change otherwise. Signed-off-by: Gleb Natapov <gleb@redhat.com> Cc: stable@kernel.org Signed-off-by: Avi Kivity <avi@redhat.com>
| * KVM: x86 emulator: Check IOPL level during io instruction emulationGleb Natapov2010-03-01
| | | | | | | | | | | | | | | | | | Make emulator check that vcpu is allowed to execute IN, INS, OUT, OUTS, CLI, STI. Signed-off-by: Gleb Natapov <gleb@redhat.com> Cc: stable@kernel.org Signed-off-by: Avi Kivity <avi@redhat.com>
| * KVM: x86 emulator: fix memory access during x86 emulationGleb Natapov2010-03-01
| | | | | | | | | | | | | | | | | | | | | | Currently when x86 emulator needs to access memory, page walk is done with broadest permission possible, so if emulated instruction was executed by userspace process it can still access kernel memory. Fix that by providing correct memory access to page walker during emulation. Signed-off-by: Gleb Natapov <gleb@redhat.com> Cc: stable@kernel.org Signed-off-by: Avi Kivity <avi@redhat.com>
| * KVM: x86 emulator: Add Virtual-8086 mode of emulationGleb Natapov2010-03-01
| | | | | | | | | | | | | | | | | | | | For some instructions CPU behaves differently for real-mode and virtual 8086. Let emulator know which mode cpu is in, so it will not poke into vcpu state directly. Signed-off-by: Gleb Natapov <gleb@redhat.com> Cc: stable@kernel.org Signed-off-by: Avi Kivity <avi@redhat.com>
| * KVM: x86 emulator: Add group9 instruction decodingGleb Natapov2010-03-01
| | | | | | | | | | | | | | | | Use groups mechanism to decode 0F C7 instructions. Signed-off-by: Gleb Natapov <gleb@redhat.com> Cc: stable@kernel.org Signed-off-by: Avi Kivity <avi@redhat.com>
| * KVM: x86 emulator: Add group8 instruction decodingGleb Natapov2010-03-01
| | | | | | | | | | | | | | | | Use groups mechanism to decode 0F BA instructions. Signed-off-by: Gleb Natapov <gleb@redhat.com> Cc: stable@kernel.org Signed-off-by: Avi Kivity <avi@redhat.com>
| * KVM: cleanup the failure path of KVM_CREATE_IRQCHIP ioctrlWei Yongjun2010-03-01
| | | | | | | | | | | | | | | | | | If we fail to init ioapic device or the fail to setup the default irq routing, the device register by kvm_create_pic() and kvm_ioapic_init() remain unregister. This patch fixed to do this. Signed-off-by: Wei Yongjun <yjwei@cn.fujitsu.com> Signed-off-by: Avi Kivity <avi@redhat.com>
| * KVM: PIT: unregister kvm irq notifier if fail to create pitWei Yongjun2010-03-01
| | | | | | | | | | | | | | | | | | If fail to create pit, we should unregister kvm irq notifier which register in kvm_create_pit(). Signed-off-by: Wei Yongjun <yjwei@cn.fujitsu.com> Acked-by: Marcelo Tosatti <mtosatti@redhat.com> Signed-off-by: Avi Kivity <avi@redhat.com>
| * KVM: VMX: Rename VMX_EPT_IGMT_BIT to VMX_EPT_IPAT_BITSheng Yang2010-03-01
| | | | | | | | | | | | | | Following the new SDM. Now the bit is named "Ignore PAT memory type". Signed-off-by: Sheng Yang <sheng@linux.intel.com> Signed-off-by: Avi Kivity <avi@redhat.com>
| * KVM: MMU: Add tracepoint for guest page agingAvi Kivity2010-03-01
| | | | | | | | Signed-off-by: Avi Kivity <avi@redhat.com>
| * KVM: Remove redundant reading of rax on OUT instructionsTakuya Yoshikawa2010-03-01
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | kvm_emulate_pio() and complete_pio() both read out the RAX register value and copy it to a place into which the value read out from the port will be copied later. This patch removes this redundancy. /*** snippet from arch/x86/kvm/x86.c ***/ int complete_pio(struct kvm_vcpu *vcpu) { ... if (!io->string) { if (io->in) { val = kvm_register_read(vcpu, VCPU_REGS_RAX); memcpy(&val, vcpu->arch.pio_data, io->size); kvm_register_write(vcpu, VCPU_REGS_RAX, val); } ... Signed-off-by: Takuya Yoshikawa <yoshikawa.takuya@oss.ntt.co.jp> Signed-off-by: Avi Kivity <avi@redhat.com>
| * KVM: VMX: emulate accessed bit for EPTRik van Riel2010-03-01
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Currently KVM pretends that pages with EPT mappings never got accessed. This has some side effects in the VM, like swapping out actively used guest pages and needlessly breaking up actively used hugepages. We can avoid those very costly side effects by emulating the accessed bit for EPT PTEs, which should only be slightly costly because pages pass through page_referenced infrequently. TLB flushing is taken care of by kvm_mmu_notifier_clear_flush_young(). This seems to help prevent KVM guests from being swapped out when they should not on my system. Signed-off-by: Rik van Riel <riel@redhat.com> Signed-off-by: Avi Kivity <avi@redhat.com>
| * KVM: Introduce kvm_host_page_sizeJoerg Roedel2010-03-01
| | | | | | | | | | | | | | | | | | | | This patch introduces a generic function to find out the host page size for a given gfn. This function is needed by the kvm iommu code. This patch also simplifies the x86 host_mapping_level function. Signed-off-by: Joerg Roedel <joerg.roedel@amd.com> Signed-off-by: Avi Kivity <avi@redhat.com>
| * KVM: VMX: Remove redundant test in vmx_set_efer()Julia Lawall2010-03-01
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | msr was tested above, so the second test is not needed. A simplified version of the semantic match that finds this problem is as follows: (http://coccinelle.lip6.fr/) // <smpl> @r@ expression *x; expression e; identifier l; @@ if (x == NULL || ...) { ... when forall return ...; } ... when != goto l; when != x = e when != &x *x == NULL // </smpl> Signed-off-by: Julia Lawall <julia@diku.dk> Signed-off-by: Avi Kivity <avi@redhat.com>
| * KVM: VMX: Wire up .fpu_activate() callbackAvi Kivity2010-03-01
| | | | | | | | Signed-off-by: Avi Kivity <avi@redhat.com>
| * KVM: fix kvm_fix_hypercall() to return X86EMUL_*Takuya Yoshikawa2010-03-01
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This patch fixes kvm_fix_hypercall() to propagate X86EMUL_* info generated by emulator_write_emulated() to its callers: suggested by Marcelo. The effect of this is x86_emulate_insn() will begin to handle the page faults which occur in emulator_write_emulated(): this should be OK because emulator_write_emulated_onepage() always injects page fault when emulator_write_emulated() returns X86EMUL_PROPAGATE_FAULT. Signed-off-by: Takuya Yoshikawa <yoshikawa.takuya@oss.ntt.co.jp> Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
| * KVM: fix load_guest_segment_descriptor() to return X86EMUL_*Takuya Yoshikawa2010-03-01
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This patch fixes load_guest_segment_descriptor() to return X86EMUL_PROPAGATE_FAULT when it tries to access the descriptor table beyond the limit of it: suggested by Marcelo. I have checked current callers of this helper function, - kvm_load_segment_descriptor() - kvm_task_switch() and confirmed that this patch will change nothing in the upper layers if we do not change the handling of this return value from load_guest_segment_descriptor(). Next step: Although fixing the kvm_task_switch() to handle the propagated faults properly seems difficult, and maybe not worth it because TSS is not used commonly these days, we can fix kvm_load_segment_descriptor(). By doing so, the injected #GP becomes possible to be handled by the guest. The only problem for this is how to differentiate this fault from the page faults generated by kvm_read_guest_virt(). We may have to split this function to achive this goal. Signed-off-by: Takuya Yoshikawa <yoshikawa.takuya@oss.ntt.co.jp> Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
| * KVM: enable PCI multiple-segments for pass-through deviceZhai, Edwin2010-03-01
| | | | | | | | | | | | | | | | | | Enable optional parameter (default 0) - PCI segment (or domain) besides BDF, when assigning PCI device to guest. Signed-off-by: Zhai Edwin <edwin.zhai@intel.com> Acked-by: Chris Wright <chrisw@sous-sol.org> Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
| * KVM: VMX: Remove redundant check in vm_need_virtualize_apic_accesses()Gui Jianfeng2010-03-01
| | | | | | | | | | | | | | | | flexpriority_enabled implies cpu_has_vmx_virtualize_apic_accesses() returning true, so we don't need this check here. Signed-off-by: Gui Jianfeng <guijianfeng@cn.fujitsu.com> Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
| * KVM: Trace failed msr reads and writesAvi Kivity2010-03-01
| | | | | | | | | | | | | | Record failed msrs reads and writes, and the fact that they failed as well. Signed-off-by: Avi Kivity <avi@redhat.com> Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
| * KVM: Fix msr traceAvi Kivity2010-03-01
| | | | | | | | | | | | | | | | - data is 64 bits wide, not unsigned long - rw is confusingly named Signed-off-by: Avi Kivity <avi@redhat.com> Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
| * KVM: mark segments accessed on HW task switchGleb Natapov2010-03-01
| | | | | | | | | | | | | | | | On HW task switch newly loaded segments should me marked as accessed. Reported-by: Lorenzo Martignoni <martignlo@gmail.com> Signed-off-by: Gleb Natapov <gleb@redhat.com> Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
| * KVM: VMX: Pass cr0.mp through to the guest when the fpu is activeAvi Kivity2010-03-01
| | | | | | | | | | | | | | | | | | | | | | | | | | | | When cr0.mp is clear, the guest doesn't expect a #NM in response to a WAIT instruction. Because we always keep cr0.mp set, it will get a #NM, and potentially be confused. Fix by keeping cr0.mp set only when the fpu is inactive, and passing it through when inactive. Reported-by: Lorenzo Martignoni <martignlo@gmail.com> Analyzed-by: Gleb Natapov <gleb@redhat.com> Signed-off-by: Avi Kivity <avi@redhat.com> Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
| * KVM: MMU: Remove some useless code from alloc_mmu_pages()Wei Yongjun2010-03-01
| | | | | | | | | | | | | | | | | | If we fail to alloc page for vcpu->arch.mmu.pae_root, call to free_mmu_pages() is unnecessary, which just do free the page malloc for vcpu->arch.mmu.pae_root. Signed-off-by: Wei Yongjun <yjwei@cn.fujitsu.com> Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
| * KVM: trace guest fpu loads and unloadsAvi Kivity2010-03-01
| | | | | | | | | | Signed-off-by: Avi Kivity <avi@redhat.com> Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
| * KVM: Optimize kvm_read_cr[04]_bits()Avi Kivity2010-03-01
| | | | | | | | | | | | | | | | | | 'mask' is always a constant, so we can check whether it includes a bit that might be owned by the guest very cheaply, and avoid the decache call. Saves a few hundred bytes of module text. Signed-off-by: Avi Kivity <avi@redhat.com> Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
| * KVM: Rename vcpu->shadow_efer to eferAvi Kivity2010-03-01
| | | | | | | | | | | | | | None of the other registers have the shadow_ prefix. Signed-off-by: Avi Kivity <avi@redhat.com> Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
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