lkml.org 
[lkml]   [2024]   [Feb]   [15]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
    Patch in this message
    /
    From
    Subject[PATCH v8 13/16] x86/kvmclock: Skip kvmclock when Secure TSC is available
    Date
    For AMD SNP guests having Secure TSC enabled, skip using the kvmclock.
    The guest kernel will fallback and use Secure TSC based clocksource.

    Signed-off-by: Nikunj A Dadhania <nikunj@amd.com>
    Tested-by: Peter Gonda <pgonda@google.com>
    ---
    arch/x86/kernel/kvmclock.c | 2 +-
    1 file changed, 1 insertion(+), 1 deletion(-)

    diff --git a/arch/x86/kernel/kvmclock.c b/arch/x86/kernel/kvmclock.c
    index 5bb395551c44..855ef65dbc4a 100644
    --- a/arch/x86/kernel/kvmclock.c
    +++ b/arch/x86/kernel/kvmclock.c
    @@ -289,7 +289,7 @@ void __init kvmclock_init(void)
    {
    u8 flags;

    - if (!kvm_para_available() || !kvmclock)
    + if (!kvm_para_available() || !kvmclock || cpu_feature_enabled(X86_FEATURE_SNP_SECURE_TSC))
    return;

    if (kvm_para_has_feature(KVM_FEATURE_CLOCKSOURCE2)) {
    --
    2.34.1

    \
     
     \ /
      Last update: 2024-05-27 15:05    [W:4.765 / U:0.092 seconds]
    ©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site