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From: Yang Weijiang <weijiang.yang@intel.com>
To: kvm@vger.kernel.org, linux-kernel@vger.kernel.org,
	sean.j.christopherson@intel.com, pbonzini@redhat.com
Cc: mst@redhat.com, rkrcmar@redhat.com, jmattson@google.com,
	Yang Weijiang <weijiang.yang@intel.com>
Subject: [PATCH v6 8/8] KVM: x86: Add user-space access interface for CET MSRs
Date: Thu, 25 Jul 2019 11:12:46 +0800	[thread overview]
Message-ID: <20190725031246.8296-9-weijiang.yang@intel.com> (raw)
In-Reply-To: <20190725031246.8296-1-weijiang.yang@intel.com>

There're two different places storing Guest CET states, the states
managed with XSAVES/XRSTORS, as restored/saved
in previous patch, can be read/write directly from/to the MSRs.
For those stored in VMCS fields, they're access via vmcs_read/
vmcs_write.

Signed-off-by: Yang Weijiang <weijiang.yang@intel.com>
---
 arch/x86/kvm/vmx/vmx.c | 43 ++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 43 insertions(+)

diff --git a/arch/x86/kvm/vmx/vmx.c b/arch/x86/kvm/vmx/vmx.c
index 123285177c6b..e5eacd01e984 100644
--- a/arch/x86/kvm/vmx/vmx.c
+++ b/arch/x86/kvm/vmx/vmx.c
@@ -1774,6 +1774,27 @@ static int vmx_get_msr(struct kvm_vcpu *vcpu, struct msr_data *msr_info)
 		else
 			msr_info->data = vmx->pt_desc.guest.addr_a[index / 2];
 		break;
+	case MSR_IA32_S_CET:
+		msr_info->data = vmcs_readl(GUEST_S_CET);
+		break;
+	case MSR_IA32_U_CET:
+		rdmsrl(MSR_IA32_U_CET, msr_info->data);
+		break;
+	case MSR_IA32_INT_SSP_TAB:
+		msr_info->data = vmcs_readl(GUEST_INTR_SSP_TABLE);
+		break;
+	case MSR_IA32_PL0_SSP:
+		rdmsrl(MSR_IA32_PL0_SSP, msr_info->data);
+		break;
+	case MSR_IA32_PL1_SSP:
+		rdmsrl(MSR_IA32_PL1_SSP, msr_info->data);
+		break;
+	case MSR_IA32_PL2_SSP:
+		rdmsrl(MSR_IA32_PL2_SSP, msr_info->data);
+		break;
+	case MSR_IA32_PL3_SSP:
+		rdmsrl(MSR_IA32_PL3_SSP, msr_info->data);
+		break;
 	case MSR_TSC_AUX:
 		if (!msr_info->host_initiated &&
 		    !guest_cpuid_has(vcpu, X86_FEATURE_RDTSCP))
@@ -2007,6 +2028,28 @@ static int vmx_set_msr(struct kvm_vcpu *vcpu, struct msr_data *msr_info)
 		else
 			vmx->pt_desc.guest.addr_a[index / 2] = data;
 		break;
+	case MSR_IA32_S_CET:
+		vmcs_writel(GUEST_S_CET, data);
+		break;
+	case MSR_IA32_U_CET:
+		wrmsrl(MSR_IA32_U_CET, data);
+		break;
+	case MSR_IA32_INT_SSP_TAB:
+		vmcs_writel(GUEST_INTR_SSP_TABLE, data);
+		break;
+	case MSR_IA32_PL0_SSP:
+		wrmsrl(MSR_IA32_PL0_SSP, data);
+		break;
+	case MSR_IA32_PL1_SSP:
+		wrmsrl(MSR_IA32_PL1_SSP, data);
+		break;
+	case MSR_IA32_PL2_SSP:
+		wrmsrl(MSR_IA32_PL2_SSP, data);
+		break;
+	case MSR_IA32_PL3_SSP:
+		wrmsrl(MSR_IA32_PL3_SSP, data);
+		break;
+
 	case MSR_TSC_AUX:
 		if (!msr_info->host_initiated &&
 		    !guest_cpuid_has(vcpu, X86_FEATURE_RDTSCP))
-- 
2.17.2


  parent reply	other threads:[~2019-07-25  3:11 UTC|newest]

Thread overview: 24+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-07-25  3:12 [PATCH v6 0/8] Introduce support for Guest CET feature Yang Weijiang
2019-07-25  3:12 ` [PATCH v6 1/8] KVM: VMX: Define CET VMCS fields and control bits Yang Weijiang
2019-07-25  3:12 ` [PATCH v6 2/8] KVM: x86: Add a helper function for CPUID(0xD,n>=1) enumeration Yang Weijiang
2019-08-12 22:18   ` Sean Christopherson
2019-08-13  6:11     ` Yang Weijiang
2019-07-25  3:12 ` [PATCH v6 3/8] KVM: x86: Implement CET CPUID enumeration for Guest Yang Weijiang
2019-08-13  0:06   ` Sean Christopherson
2019-08-13  5:27     ` Yang Weijiang
2019-07-25  3:12 ` [PATCH v6 4/8] KVM: VMX: Pass through CET related MSRs to Guest Yang Weijiang
2019-08-12 23:53   ` Sean Christopherson
2019-08-13  5:49     ` Yang Weijiang
2019-07-25  3:12 ` [PATCH v6 5/8] KVM: VMX: Load Guest CET via VMCS when CET is enabled in Guest Yang Weijiang
2019-08-12 23:56   ` Sean Christopherson
2019-08-13  5:38     ` Yang Weijiang
2019-07-25  3:12 ` [PATCH v6 6/8] KVM: x86: Add CET bits setting in CR4 and XSS Yang Weijiang
2019-07-25  3:12 ` [PATCH v6 7/8] KVM: x86: Load Guest fpu state when accessing MSRs managed by XSAVES Yang Weijiang
2019-08-12 23:02   ` Sean Christopherson
2019-08-12 23:04     ` Sean Christopherson
2019-08-12 23:29     ` Sean Christopherson
2019-08-13  6:06       ` Yang Weijiang
2019-08-13  6:05     ` Yang Weijiang
2019-07-25  3:12 ` Yang Weijiang [this message]
2019-08-12 23:43   ` [PATCH v6 8/8] KVM: x86: Add user-space access interface for CET MSRs Sean Christopherson
2019-08-13  5:41     ` Yang Weijiang

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