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af3511ff7f
linux/arch/x86/kvm
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Lai Jiangshan af3511ff7f KVM: x86: Ensure PV TLB flush tracepoint reflects KVM behavior 
In record_steal_time(), st->preempted is read twice, and
trace_kvm_pv_tlb_flush() might output result inconsistent if
kvm_vcpu_flush_tlb_guest() see a different st->preempted later.

It is a very trivial problem and hardly has actual harm and can be
avoided by reseting and reading st->preempted in atomic way via xchg().

Signed-off-by: Lai Jiangshan <laijs@linux.alibaba.com>

Message-Id: <20210531174628.10265-1-jiangshanlai@gmail.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2021-06-08 13:15:20 -04:00
..
mmu KVM: X86: MMU: Use the correct inherited permissions to get shadow page 2021-06-08 12:29:53 -04:00
svm KVM: SVM: Fix SEV SEND_START session length & SEND_UPDATE_DATA query length after commit 238eca821c 2021-06-08 12:21:55 -04:00
vmx KVM: X86: Use kvm_get_linear_rip() in single-step and #DB/#BP interception 2021-05-28 12:57:53 -04:00
cpuid.c KVM: X86: Expose bus lock debug exception to guest 2021-05-07 06:06:20 -04:00
cpuid.h KVM: x86: Move reverse CPUID helpers to separate header file 2021-04-26 05:27:13 -04:00
debugfs.c KVM: let kvm_destroy_vm_debugfs clean up vCPU debugfs directories 2020-06-04 11:00:54 -04:00
emulate.c KVM: X86: Kill off ctxt->ud 2021-05-28 12:59:10 -04:00
hyperv.c KVM: X86: hyper-v: Task srcu lock when accessing kvm_memslots() 2021-05-27 07:45:53 -04:00
hyperv.h KVM: x86: hyper-v: Prevent using not-yet-updated TSC page by secondary CPUs 2021-03-17 04:03:22 -04:00
i8254.c kvm: i8254: remove redundant assignment to pointer s 2020-06-11 12:35:18 -04:00
i8254.h
i8259.c KVM: x86: Refactor picdev_write() to prevent Spectre-v1/L1TF attacks 2020-01-27 19:59:37 +01:00
ioapic.c KVM: ioapic: break infinite recursion on lazy EOI 2020-10-24 04:42:06 -04:00
ioapic.h kvm/x86: Remove redundant function implementations 2020-05-27 13:11:10 -04:00
irq_comm.c x86: Fix various typos in comments 2021-03-18 15:31:53 +01:00
irq.c KVM: x86/xen: Add event channel interrupt vector upcall 2021-02-04 14:19:39 +00:00
irq.h kvm/x86: Remove redundant function implementations 2020-05-27 13:11:10 -04:00
Kconfig x86/sgx: Introduce virtual EPC for use by KVM guests 2021-04-06 09:43:17 +02:00
kvm_cache_regs.h KVM: x86: Rename GPR accessors to make mode-aware variants the defaults 2021-04-26 05:27:13 -04:00
kvm_emulate.h KVM: X86: Kill off ctxt->ud 2021-05-28 12:59:10 -04:00
lapic.c KVM: LAPIC: Write 0 to TMICT should also cancel vmx-preemption timer 2021-06-08 12:22:26 -04:00
lapic.h KVM: x86: hyper-v: Always use to_hv_vcpu() accessor to get to 'struct kvm_vcpu_hv' 2021-02-09 08:17:13 -05:00
Makefile Merge branch 'kvm-sev-cgroup' into HEAD 2021-04-22 13:19:01 -04:00
mmu.h KVM: x86: Get active PCID only when writing a CR3 value 2021-03-15 04:43:56 -04:00
mtrr.c KVM: x86: Add helper to consolidate "raw" reserved GPA mask calculations 2021-02-04 09:27:30 -05:00
pmu.c KVM: x86: use static calls to reduce kvm_x86_ops overhead 2021-02-04 05:27:30 -05:00
pmu.h x86: Fix various typos in comments 2021-03-18 15:31:53 +01:00
reverse_cpuid.h KVM: SEV: Mask CPUID[0x8000001F].eax according to supported features 2021-04-26 05:27:15 -04:00
trace.h KVM: x86/xen: intercept xen hypercalls if enabled 2021-02-04 14:18:45 +00:00
tss.h
x86.c KVM: x86: Ensure PV TLB flush tracepoint reflects KVM behavior 2021-06-08 13:15:20 -04:00
x86.h KVM: x86: Consolidate guest enter/exit logic to common helpers 2021-05-05 22:54:12 +02:00
xen.c KVM: x86: Rename GPR accessors to make mode-aware variants the defaults 2021-04-26 05:27:13 -04:00
xen.h KVM: x86/xen: Add support for vCPU runstate information 2021-03-02 14:30:54 -05:00