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| author |   Like Xu <like.xu@linux.intel.com> | 2022-04-11 18:19:39 +0800 |
|---|---|---|
| committer |   Paolo Bonzini <pbonzini@redhat.com> | 2022-06-08 04:48:03 -0400 |
| commit | 8183a538cd95f72f11871b35726256ec3bcb9439 (patch) | |
| tree | bde33c5879f0678a88732c711db35f50c33c0c92 /arch/x86/include/asm/kvm_host.h | |
| parent | KVM: x86/pmu: Adjust precise_ip to emulate Ice Lake guest PDIR counter (diff) | |
| download | linux-dev-8183a538cd95f72f11871b35726256ec3bcb9439.tar.xz linux-dev-8183a538cd95f72f11871b35726256ec3bcb9439.zip | |
KVM: x86/pmu: Add IA32_DS_AREA MSR emulation to support guest DS
When CPUID.01H:EDX.DS[21] is set, the IA32_DS_AREA MSR exists and points
to the linear address of the first byte of the DS buffer management area,
which is used to manage the PEBS records.
When guest PEBS is enabled, the MSR_IA32_DS_AREA MSR will be added to the
perf_guest_switch_msr() and switched during the VMX transitions just like
CORE_PERF_GLOBAL_CTRL MSR. The WRMSR to IA32_DS_AREA MSR brings a #GP(0)
if the source register contains a non-canonical address.
Originally-by: Andi Kleen <ak@linux.intel.com>
Co-developed-by: Kan Liang <kan.liang@linux.intel.com>
Signed-off-by: Kan Liang <kan.liang@linux.intel.com>
Signed-off-by: Like Xu <like.xu@linux.intel.com>
Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Message-Id: <20220411101946.20262-11-likexu@tencent.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'arch/x86/include/asm/kvm_host.h')
| -rw-r--r-- | arch/x86/include/asm/kvm_host.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/arch/x86/include/asm/kvm_host.h b/arch/x86/include/asm/kvm_host.h index 36a5650b9007..dc5f68a313b0 100644 --- a/arch/x86/include/asm/kvm_host.h +++ b/arch/x86/include/asm/kvm_host.h @@ -521,6 +521,7 @@ struct kvm_pmu { DECLARE_BITMAP(all_valid_pmc_idx, X86_PMC_IDX_MAX); DECLARE_BITMAP(pmc_in_use, X86_PMC_IDX_MAX); + u64 ds_area; u64 pebs_enable; u64 pebs_enable_mask; |