lkml.org 
[lkml]   [2022]   [Nov]   [25]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
    Patch in this message
    /
    From
    Subject[PATCH v2 02/15] KVM: x86: Report XSS as an MSR to be saved if there are supported features
    Date
    From: Sean Christopherson <sean.j.christopherson@intel.com>

    Add MSR_IA32_XSS to the list of MSRs reported to userspace if
    supported_xss is non-zero, i.e. KVM supports at least one XSS based
    feature.

    Signed-off-by: Sean Christopherson <sean.j.christopherson@intel.com>
    Signed-off-by: Yang Weijiang <weijiang.yang@intel.com>
    ---
    arch/x86/kvm/x86.c | 5 +++++
    1 file changed, 5 insertions(+)

    diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c
    index f18f579ebde8..16726b44061b 100644
    --- a/arch/x86/kvm/x86.c
    +++ b/arch/x86/kvm/x86.c
    @@ -1465,6 +1465,7 @@ 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,
    };

    static u32 msrs_to_save[ARRAY_SIZE(msrs_to_save_all)];
    @@ -7061,6 +7062,10 @@ static void kvm_init_msr_list(void)
    if (!kvm_cpu_cap_has(X86_FEATURE_XFD))
    continue;
    break;
    + case MSR_IA32_XSS:
    + if (!kvm_caps.supported_xss)
    + continue;
    + break;
    default:
    break;
    }
    --
    2.27.0
    \
     
     \ /
      Last update: 2022-11-25 07:10    [W:4.326 / U:0.600 seconds]
    ©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site