Displaying 5 results from an estimated 5 matches for "vmx_passthrough_lbr_msr".
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vmx_passthrough_lbr_msrs
2017 Sep 25
0
[PATCH v1 4/4] KVM/vmx: enable lbr for the guest
...ch_msr(vmx, MSR_IA32_DEBUGCTLMSR, 0, 0);
+ if (enable_lbrv)
+ auto_switch_lbr_msrs(vmx);
+
if (vmcs_config.vmentry_ctrl & VM_ENTRY_LOAD_IA32_PAT)
vmcs_write64(GUEST_IA32_PAT, vmx->vcpu.arch.pat);
@@ -6721,6 +6746,28 @@ void vmx_enable_tdp(void)
kvm_enable_tdp();
}
+static void vmx_passthrough_lbr_msrs(void)
+{
+ int i;
+ struct perf_lbr_stack lbr_stack;
+
+ if (perf_get_lbr_stack(&lbr_stack) < 0) {
+ enable_lbrv = false;
+ return;
+ }
+
+ vmx_disable_intercept_for_msr(MSR_LBR_SELECT, false);
+ vmx_disable_intercept_for_msr(lbr_stack.lbr_tos, false);
+
+ for (i = 0; i < lbr_stack.lbr...
2017 Sep 25
1
[PATCH v1 4/4] KVM/vmx: enable lbr for the guest
...nable_lbrv)
> + auto_switch_lbr_msrs(vmx);
> +
> if (vmcs_config.vmentry_ctrl & VM_ENTRY_LOAD_IA32_PAT)
> vmcs_write64(GUEST_IA32_PAT, vmx->vcpu.arch.pat);
>
> @@ -6721,6 +6746,28 @@ void vmx_enable_tdp(void)
> kvm_enable_tdp();
> }
>
> +static void vmx_passthrough_lbr_msrs(void)
> +{
> + int i;
> + struct perf_lbr_stack lbr_stack;
> +
> + if (perf_get_lbr_stack(&lbr_stack) < 0) {
> + enable_lbrv = false;
> + return;
> + }
> +
> + vmx_disable_intercept_for_msr(MSR_LBR_SELECT, false);
> + vmx_disable_intercept_for_msr(lbr_stac...
2017 Sep 25
1
[PATCH v1 4/4] KVM/vmx: enable lbr for the guest
...nable_lbrv)
> + auto_switch_lbr_msrs(vmx);
> +
> if (vmcs_config.vmentry_ctrl & VM_ENTRY_LOAD_IA32_PAT)
> vmcs_write64(GUEST_IA32_PAT, vmx->vcpu.arch.pat);
>
> @@ -6721,6 +6746,28 @@ void vmx_enable_tdp(void)
> kvm_enable_tdp();
> }
>
> +static void vmx_passthrough_lbr_msrs(void)
> +{
> + int i;
> + struct perf_lbr_stack lbr_stack;
> +
> + if (perf_get_lbr_stack(&lbr_stack) < 0) {
> + enable_lbrv = false;
> + return;
> + }
> +
> + vmx_disable_intercept_for_msr(MSR_LBR_SELECT, false);
> + vmx_disable_intercept_for_msr(lbr_stac...
2017 Sep 25
10
[PATCH v1 0/4] Enable LBR for the guest
This patch series enables the Last Branch Recording feature for the
guest. Instead of trapping each LBR stack MSR access, the MSRs are
passthroughed to the guest. Those MSRs are switched (i.e. load and
saved) on VMExit and VMEntry.
Test:
Try "perf record -b ./test_program" on guest.
Wei Wang (4):
KVM/vmx: re-write the msr auto switch feature
KVM/vmx: auto switch
2017 Sep 25
10
[PATCH v1 0/4] Enable LBR for the guest
This patch series enables the Last Branch Recording feature for the
guest. Instead of trapping each LBR stack MSR access, the MSRs are
passthroughed to the guest. Those MSRs are switched (i.e. load and
saved) on VMExit and VMEntry.
Test:
Try "perf record -b ./test_program" on guest.
Wei Wang (4):
KVM/vmx: re-write the msr auto switch feature
KVM/vmx: auto switch