linux-kernel - [PATCH 6/6] KVM: nVMX: support RDRAND and RDSEED exiting

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Date:   Thu, 30 Mar 2017 11:55:32 +0200
From:   Paolo Bonzini <pbonzini@...hat.com>
To:     linux-kernel@...r.kernel.org, kvm@...r.kernel.org
Cc:     david@...hat.com
Subject: [PATCH 6/6] KVM: nVMX: support RDRAND and RDSEED exiting

Signed-off-by: Paolo Bonzini <pbonzini@...hat.com>
---
 arch/x86/include/asm/vmx.h | 2 ++
 arch/x86/kvm/vmx.c         | 5 +++++
 2 files changed, 7 insertions(+)

diff --git a/arch/x86/include/asm/vmx.h b/arch/x86/include/asm/vmx.h
index dffe8d68fb27..35cd06f636ab 100644
--- a/arch/x86/include/asm/vmx.h
+++ b/arch/x86/include/asm/vmx.h
@@ -70,8 +70,10 @@
 #define SECONDARY_EXEC_APIC_REGISTER_VIRT       0x00000100
 #define SECONDARY_EXEC_VIRTUAL_INTR_DELIVERY    0x00000200
 #define SECONDARY_EXEC_PAUSE_LOOP_EXITING	0x00000400
+#define SECONDARY_EXEC_RDRAND			0x00000800
 #define SECONDARY_EXEC_ENABLE_INVPCID		0x00001000
 #define SECONDARY_EXEC_SHADOW_VMCS              0x00004000
+#define SECONDARY_EXEC_RDSEED			0x00010000
 #define SECONDARY_EXEC_ENABLE_PML               0x00020000
 #define SECONDARY_EXEC_XSAVES			0x00100000
 #define SECONDARY_EXEC_TSC_SCALING              0x02000000
diff --git a/arch/x86/kvm/vmx.c b/arch/x86/kvm/vmx.c
index 6aaecc78dd71..efc3a73c2109 100644
--- a/arch/x86/kvm/vmx.c
+++ b/arch/x86/kvm/vmx.c
@@ -2745,6 +2745,7 @@ static void nested_vmx_setup_ctls_msrs(struct vcpu_vmx *vmx)
 		vmx->nested.nested_vmx_secondary_ctls_high);
 	vmx->nested.nested_vmx_secondary_ctls_low = 0;
 	vmx->nested.nested_vmx_secondary_ctls_high &=
+		SECONDARY_EXEC_RDRAND | SECONDARY_EXEC_RDSEED |
 		SECONDARY_EXEC_VIRTUALIZE_APIC_ACCESSES |
 		SECONDARY_EXEC_RDTSCP |
 		SECONDARY_EXEC_DESC |
@@ -8083,6 +8084,10 @@ static bool nested_vmx_exit_handled(struct kvm_vcpu *vcpu)
 		return nested_cpu_has(vmcs12, CPU_BASED_INVLPG_EXITING);
 	case EXIT_REASON_RDPMC:
 		return nested_cpu_has(vmcs12, CPU_BASED_RDPMC_EXITING);
+	case EXIT_REASON_RDRAND:
+		return nested_cpu_has2(vmcs12, SECONDARY_EXEC_RDRAND);
+	case EXIT_REASON_RDSEED:
+		return nested_cpu_has2(vmcs12, SECONDARY_EXEC_RDSEED);
 	case EXIT_REASON_RDTSC: case EXIT_REASON_RDTSCP:
 		return nested_cpu_has(vmcs12, CPU_BASED_RDTSC_EXITING);
 	case EXIT_REASON_VMCALL: case EXIT_REASON_VMCLEAR:
-- 
1.8.3.1