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From: Luwei Kang <luwei.kang@intel.com>
To: kvm@vger.kernel.org
Cc: tglx@linutronix.de, mingo@redhat.com, hpa@zytor.com,
	x86@kernel.org, chao.p.peng@linux.intel.com,
	thomas.lendacky@amd.com, bp@suse.de, Kan.liang@intel.com,
	Janakarajan.Natarajan@amd.com, dwmw@amazon.co.uk,
	linux-kernel@vger.kernel.org, alexander.shishkin@linux.intel.com,
	peterz@infradead.org, mathieu.poirier@linaro.org,
	kstewart@linuxfoundation.org, gregkh@linuxfoundation.org,
	pbonzini@redhat.com, rkrcmar@redhat.com, david@redhat.com,
	bsd@redhat.com, yu.c.zhang@linux.intel.com, joro@8bytes.org,
	Luwei Kang <luwei.kang@intel.com>
Subject: [PATCH v8 11/12] KVM: x86: Set intercept for Intel PT MSRs read/write
Date: Mon, 14 May 2018 18:57:11 +0800	[thread overview]
Message-ID: <1526295432-20640-12-git-send-email-luwei.kang@intel.com> (raw)
In-Reply-To: <1526295432-20640-1-git-send-email-luwei.kang@intel.com>

From: Chao Peng <chao.p.peng@linux.intel.com>

Disable intercept 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 | 23 +++++++++++++++++++++++
 1 file changed, 23 insertions(+)

diff --git a/arch/x86/kvm/vmx.c b/arch/x86/kvm/vmx.c
index d04b235..170cd48 100644
--- a/arch/x86/kvm/vmx.c
+++ b/arch/x86/kvm/vmx.c
@@ -947,6 +947,7 @@ static bool nested_vmx_is_page_fault_vmexit(struct vmcs12 *vmcs12,
 static void vmx_update_msr_bitmap(struct kvm_vcpu *vcpu);
 static void __always_inline vmx_disable_intercept_for_msr(unsigned long *msr_bitmap,
 							  u32 msr, int type);
+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);
@@ -3998,6 +3999,7 @@ static int vmx_set_msr(struct kvm_vcpu *vcpu, struct msr_data *msr_info)
 			vmx_rtit_ctl_check(vcpu, data))
 			return 1;
 		vmcs_write64(GUEST_IA32_RTIT_CTL, data);
+		pt_set_intercept_for_msr(vmx, !(data & RTIT_CTL_TRACEEN));
 		vmx->pt_desc.guest.ctl = data;
 		break;
 	case MSR_IA32_RTIT_STATUS:
@@ -5819,6 +5821,27 @@ 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.addr_range; i++) {
+		vmx_set_intercept_for_msr(msr_bitmap,
+			MSR_IA32_RTIT_ADDR0_A + i * 2, MSR_TYPE_RW, flag);
+		vmx_set_intercept_for_msr(msr_bitmap,
+			MSR_IA32_RTIT_ADDR0_B + i * 2, MSR_TYPE_RW, flag);
+	}
+}
+
 static bool vmx_get_enable_apicv(struct kvm_vcpu *vcpu)
 {
 	return enable_apicv;
-- 
1.8.3.1

  parent reply	other threads:[~2018-05-14 10:57 UTC|newest]

Thread overview: 16+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-05-14 10:57 [PATCH v8 00/12] Intel Processor Trace virtualization enabling Luwei Kang
2018-05-14 10:57 ` [PATCH v8 01/12] perf/x86/intel/pt: Move Intel-PT MSRs bit definitions to a public header Luwei Kang
2018-05-14 10:22   ` Alexander Shishkin
2018-05-16  9:42     ` Kang, Luwei
2018-05-16  9:42       ` Kang, Luwei
2018-05-14 10:57 ` [PATCH v8 02/12] perf/x86/intel/pt: Change pt_cap_get() to a public function Luwei Kang
2018-05-14 10:57 ` [PATCH v8 03/12] perf/x86/intel/pt: Add new bit definitions for Intel PT MSRs Luwei Kang
2018-05-14 10:57 ` [PATCH v8 04/12] perf/x86/intel/pt: add new capability for Intel PT Luwei Kang
2018-05-14 10:57 ` [PATCH v8 05/12] perf/x86/intel/pt: Introduce a new function to get capability of " Luwei Kang
2018-05-14 10:57 ` [PATCH v8 06/12] KVM: x86: Add Intel Processor Trace virtualization mode Luwei Kang
2018-05-14 10:57 ` [PATCH v8 07/12] KVM: x86: Add Intel Processor Trace cpuid emulation Luwei Kang
2018-05-14 10:57 ` [PATCH v8 08/12] KVM: x86: Add Intel Processor Trace context switch for each vcpu Luwei Kang
2018-05-14 10:57 ` [PATCH v8 09/12] KVM: x86: Introduce a function to initialize the PT configuration Luwei Kang
2018-05-14 10:57 ` [PATCH v8 10/12] KVM: x86: Implement Intel Processor Trace MSRs read/write emulation Luwei Kang
2018-05-14 10:57 ` Luwei Kang [this message]
2018-05-14 10:57 ` [PATCH v8 12/12] KVM: x86: Disable Intel Processor Trace when VMXON in L1 guest Luwei Kang

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