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 d49d661ec0a7..25670d8a485b 100644 --- a/arch/x86/events/intel/ds.c +++ b/arch/x86/events/intel/ds.c @@ -2428,3 +2428,4 @@ 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 3b2ba9f974be..68a8d01c03bd 100644 --- a/arch/x86/kvm/vmx/tdx.c +++ b/arch/x86/kvm/vmx/tdx.c @@ -715,6 +715,7 @@ fastpath_t tdx_vcpu_run(struct kvm_vcpu *vcpu) tdx_vcpu_enter_exit(tdx); tdx_user_return_update_cache(vcpu); + perf_restore_debug_store(); tdx_restore_host_xsave_state(vcpu); tdx->host_state_need_restore = true; -- 2.25.1
