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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, pbonzini@redhat.com, rkrcmar@redhat.com,
	linux-kernel@vger.kernel.org, joro@8bytes.org,
	Chao Peng <chao.p.peng@linux.intel.com>,
	Luwei Kang <luwei.kang@intel.com>
Subject: [PATCH v6 10/11] KVM: x86: Set intercept for Intel PT MSRs
Date: Tue, 20 Mar 2018 19:21:57 +0800	[thread overview]
Message-ID: <1521544918-31084-11-git-send-email-luwei.kang@intel.com> (raw)
In-Reply-To: <1521544918-31084-1-git-send-email-luwei.kang@intel.com>

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 0334100..27185da 100644
--- a/arch/x86/kvm/vmx.c
+++ b/arch/x86/kvm/vmx.c
@@ -941,6 +941,7 @@ 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);
@@ -3765,6 +3766,7 @@ 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:
@@ -5554,6 +5556,24 @@ 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

  parent reply	other threads:[~2018-03-21  1:11 UTC|newest]

Thread overview: 17+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-03-20 11:21 [PATCH v6 00/11] Intel Processor Trace virtualization enabling Luwei Kang
2018-03-20 11:21 ` [PATCH v6 01/11] perf/x86/intel/pt: Move Intel-PT MSR bit definitions to a public header Luwei Kang
2018-04-30 13:57   ` Peter Zijlstra
2018-05-02  7:41     ` Kang, Luwei
2018-03-20 11:21 ` [PATCH v6 02/11] perf/x86/intel/pt: Change pt_cap_get() to a public function Luwei Kang
2018-04-30 13:59   ` Peter Zijlstra
2018-03-20 11:21 ` [PATCH v6 03/11] perf/x86/intel/pt: Introduce a new function to get the capability of Intel PT Luwei Kang
2018-04-30 14:01   ` Peter Zijlstra
2018-03-20 11:21 ` [PATCH v6 04/11] KVM: x86: Add Intel Processor Trace virtualization mode Luwei Kang
2018-03-20 11:21 ` [PATCH v6 05/11] KVM: x86: Add Intel Processor Trace cpuid emulation Luwei Kang
2018-03-20 11:21 ` [PATCH v6 06/11] KVM: x86: Add Intel processor trace context for each vcpu Luwei Kang
2018-03-20 11:21 ` [PATCH v6 07/11] KVM: x86: Implement Intel Processor Trace context switch Luwei Kang
2018-03-20 11:21 ` [PATCH v6 08/11] KVM: x86: Introduce a function to initialize the PT configuration Luwei Kang
2018-03-20 11:21 ` [PATCH v6 09/11] KVM: x86: Implement Intel Processor Trace MSRs read/write Luwei Kang
2018-03-20 11:21 ` Luwei Kang [this message]
2018-03-20 11:21 ` [PATCH v6 11/11] KVM: x86: Disable Intel Processor Trace when VMXON in L1 guest Luwei Kang
2018-04-30 13:17 ` [PATCH v6 00/11] Intel Processor Trace virtualization enabling Paolo Bonzini

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