Enable X86_FEATURE_TSC_RELIABLE by default as X86_FEATURE_TSC_RELIABLE is independent from invariant TSC and should have never been gated by the HV_ACCESS_TSC_INVARIANT privilege. To elaborate, the HV_ACCESS_TSC_INVARIANT privilege allows certain types of guests to opt-in to invariant TSC by writing the HV_X64_MSR_TSC_INVARIANT_CONTROL register. Not all guests will have this privilege and the hypervisor will automatically opt-in certain types of guests (e.g. EXO partitions) to invariant TSC, but this functionality is unrelated to the TSC reliability. Signed-off-by: Stanislav Kinsburskii <skinsburskii@xxxxxxxxxxxxxxxxxxx> --- arch/x86/kernel/cpu/mshyperv.c | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) diff --git a/arch/x86/kernel/cpu/mshyperv.c b/arch/x86/kernel/cpu/mshyperv.c index d18078834ded..14412afcc398 100644 --- a/arch/x86/kernel/cpu/mshyperv.c +++ b/arch/x86/kernel/cpu/mshyperv.c @@ -515,7 +515,7 @@ static void __init ms_hyperv_init_platform(void) machine_ops.crash_shutdown = hv_machine_crash_shutdown; #endif #endif - if (ms_hyperv.features & HV_ACCESS_TSC_INVARIANT) { + if (ms_hyperv.features & HV_ACCESS_TSC_INVARIANT) /* * Writing to synthetic MSR 0x40000118 updates/changes the * guest visible CPUIDs. Setting bit 0 of this MSR enables @@ -526,8 +526,8 @@ static void __init ms_hyperv_init_platform(void) * is called. */ wrmsrl(HV_X64_MSR_TSC_INVARIANT_CONTROL, HV_EXPOSE_INVARIANT_TSC); - setup_force_cpu_cap(X86_FEATURE_TSC_RELIABLE); - } + + setup_force_cpu_cap(X86_FEATURE_TSC_RELIABLE); /* * Generation 2 instances don't support reading the NMI status from