From: Isaku Yamahata <isaku.yamahata@xxxxxxxxx> Because debug store is clobbered, restore it on TD exit. Signed-off-by: Isaku Yamahata <isaku.yamahata@xxxxxxxxx> Reviewed-by: Paolo Bonzini <pbonzini@xxxxxxxxxx> --- arch/x86/events/intel/ds.c | 1 + arch/x86/kvm/vmx/tdx.c | 1 + 2 files changed, 2 insertions(+) diff --git a/arch/x86/events/intel/ds.c b/arch/x86/events/intel/ds.c index de1f55d51784..e80d25ab4bcf 100644 --- a/arch/x86/events/intel/ds.c +++ b/arch/x86/events/intel/ds.c @@ -2308,3 +2308,4 @@ void perf_restore_debug_store(void) wrmsrl(MSR_IA32_DS_AREA, (unsigned long)ds); } +EXPORT_SYMBOL_GPL(perf_restore_debug_store); diff --git a/arch/x86/kvm/vmx/tdx.c b/arch/x86/kvm/vmx/tdx.c index 44c8bdb5b1d0..407216512729 100644 --- a/arch/x86/kvm/vmx/tdx.c +++ b/arch/x86/kvm/vmx/tdx.c @@ -518,6 +518,7 @@ fastpath_t tdx_vcpu_run(struct kvm_vcpu *vcpu) tdx_vcpu_enter_exit(vcpu, tdx); tdx_user_return_update_cache(); + perf_restore_debug_store(); tdx_restore_host_xsave_state(vcpu); tdx->host_state_need_restore = true; -- 2.25.1
