Messages in this thread Patch in this message | | | From | Luwei Kang <> | Subject | [PATCH v5 10/11] KVM: x86: Set intercept for Intel PT MSRs | Date | Sun, 4 Mar 2018 20:07:20 +0800 |
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From: Chao Peng <chao.p.peng@linux.intel.com>
Disable interrcept Intel PT MSRs only when Intel PT is enabled in guest. But MSR_IA32_RTIT_CTL will alway be intercept.
Signed-off-by: Chao Peng <chao.p.peng@linux.intel.com> Signed-off-by: Luwei Kang <luwei.kang@intel.com> --- arch/x86/kvm/vmx.c | 20 ++++++++++++++++++++ 1 file changed, 20 insertions(+)
diff --git a/arch/x86/kvm/vmx.c b/arch/x86/kvm/vmx.c index 16943a8..0a55772 100644 --- a/arch/x86/kvm/vmx.c +++ b/arch/x86/kvm/vmx.c @@ -935,6 +935,7 @@ static bool nested_vmx_is_page_fault_vmexit(struct vmcs12 *vmcs12, static void __always_inline vmx_disable_intercept_for_msr(unsigned long *msr_bitmap, u32 msr, int type); static bool vmx_pt_supported(void); +static void pt_set_intercept_for_msr(struct vcpu_vmx *vmx, bool flag); static DEFINE_PER_CPU(struct vmcs *, vmxarea); static DEFINE_PER_CPU(struct vmcs *, current_vmcs); @@ -3713,6 +3714,7 @@ static int vmx_set_msr(struct kvm_vcpu *vcpu, struct msr_data *msr_info) return 1; vmcs_write64(GUEST_IA32_RTIT_CTL, data); vmx->pt_desc.guest.ctl = data; + pt_set_intercept_for_msr(vmx, !(data & RTIT_CTL_TRACEEN)); break; case MSR_IA32_RTIT_STATUS: if (!vmx_pt_supported() || @@ -5496,6 +5498,24 @@ static void vmx_update_msr_bitmap(struct kvm_vcpu *vcpu) vmx->msr_bitmap_mode = mode; } +static void pt_set_intercept_for_msr(struct vcpu_vmx *vmx, bool flag) +{ + unsigned long *msr_bitmap = vmx->vmcs01.msr_bitmap; + u32 i; + + vmx_set_intercept_for_msr(msr_bitmap, MSR_IA32_RTIT_STATUS, + MSR_TYPE_RW, flag); + vmx_set_intercept_for_msr(msr_bitmap, MSR_IA32_RTIT_OUTPUT_BASE, + MSR_TYPE_RW, flag); + vmx_set_intercept_for_msr(msr_bitmap, MSR_IA32_RTIT_OUTPUT_MASK, + MSR_TYPE_RW, flag); + vmx_set_intercept_for_msr(msr_bitmap, MSR_IA32_RTIT_CR3_MATCH, + MSR_TYPE_RW, flag); + for (i = 0; i < vmx->pt_desc.range_cnt; i++) + vmx_set_intercept_for_msr(msr_bitmap, MSR_IA32_RTIT_ADDR0_A + i, + MSR_TYPE_RW, flag); +} + static bool vmx_get_enable_apicv(struct kvm_vcpu *vcpu) { return enable_apicv; -- 1.8.3.1
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