| Message ID | 20220506033305.5135-6-weijiang.yang@intel.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | Introduce Architectural LBR for vPMU | expand |
diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c index f78fc014aed3..8437d0c9804f 100644 --- a/arch/x86/kvm/x86.c +++ b/arch/x86/kvm/x86.c @@ -1429,6 +1429,7 @@ static const u32 msrs_to_save_all[] = { MSR_F15H_PERF_CTR3, MSR_F15H_PERF_CTR4, MSR_F15H_PERF_CTR5, MSR_IA32_XFD, MSR_IA32_XFD_ERR, MSR_IA32_XSS, + MSR_ARCH_LBR_CTL, MSR_ARCH_LBR_DEPTH, }; static u32 msrs_to_save[ARRAY_SIZE(msrs_to_save_all)]; @@ -6660,6 +6661,11 @@ static void kvm_init_msr_list(void) if (!supported_xss) continue; break; + case MSR_ARCH_LBR_DEPTH: + case MSR_ARCH_LBR_CTL: + if (!kvm_cpu_cap_has(X86_FEATURE_ARCH_LBR)) + continue; + break; default: break; }
Arch LBR MSR_ARCH_LBR_DEPTH and MSR_ARCH_LBR_CTL are queried by userspace application before it wants to {save|restore} the Arch LBR data. Other LBR related data MSRs are omitted here intentionally due to lengthy list(32*3). Userspace can still use KVM_{GET|SET}_MSRS to access them if necessary. Suggested-by: Jim Mattson <jmattson@google.com> Signed-off-by: Yang Weijiang <weijiang.yang@intel.com> Reviewed-by: Jim Mattson <jmattson@google.com> --- arch/x86/kvm/x86.c | 6 ++++++ 1 file changed, 6 insertions(+)