diff mbox series

[v2,5/5] KVM: VMX: Switch PEBS records output to Intel PT buffer

Message ID 1584628430-23220-6-git-send-email-luwei.kang@intel.com (mailing list archive)
State New, archived
Headers show
Series PEBS virtualization enabling via Intel PT | expand

Commit Message

Luwei Kang March 19, 2020, 2:33 p.m. UTC 
Switch PEBS records output to Intel PT buffer when PEBS is enabled
in KVM guest by Intel PT.

Signed-off-by: Luwei Kang <luwei.kang@intel.com>
---
 arch/x86/kvm/vmx/vmx.c | 3 +++
 1 file changed, 3 insertions(+)
diff mbox series

Patch

diff --git a/arch/x86/kvm/vmx/vmx.c b/arch/x86/kvm/vmx/vmx.c
index c6d9a87..ec74656 100644
--- a/arch/x86/kvm/vmx/vmx.c
+++ b/arch/x86/kvm/vmx/vmx.c
@@ -921,6 +921,7 @@  void add_atomic_switch_msr(struct vcpu_vmx *vmx, unsigned msr,
 {
 	int i, j = 0;
 	struct msr_autoload *m = &vmx->msr_autoload;
+	struct kvm_pmu *pmu = vcpu_to_pmu(&vmx->vcpu);
 
 	switch (msr) {
 	case MSR_EFER:
@@ -952,6 +953,8 @@  void add_atomic_switch_msr(struct vcpu_vmx *vmx, unsigned msr,
 		 * guest's memory.
 		 */
 		wrmsrl(MSR_IA32_PEBS_ENABLE, 0);
+		if ((pmu->pebs_enable & PEBS_OUTPUT_MASK) == PEBS_OUTPUT_PT)
+			guest_val |= PEBS_OUTPUT_PT;
 	}
 
 	i = vmx_find_msr_index(&m->guest, msr);