From 36725f4d9636cea24ce6ea463b1ba50a03315236 Mon Sep 17 00:00:00 2001 From: Sheng Yang Date: Tue, 15 Dec 2009 13:29:54 +0800 Subject: KVM: VMX: Trap and invalid MWAIT/MONITOR instruction commit 59708670b639bff00f92e519df1ae14da240e919 upstream. We don't support these instructions, but guest can execute them even if the feature('monitor') haven't been exposed in CPUID. So we would trap and inject a #UD if guest try this way. Signed-off-by: Sheng Yang Signed-off-by: Avi Kivity Signed-off-by: Greg Kroah-Hartman --- arch/x86/include/asm/vmx.h | 1 + arch/x86/kvm/vmx.c | 10 ++++++++++ 2 files changed, 11 insertions(+) diff --git a/arch/x86/include/asm/vmx.h b/arch/x86/include/asm/vmx.h index 2b4945419a84..8f6b0111446a 100644 --- a/arch/x86/include/asm/vmx.h +++ b/arch/x86/include/asm/vmx.h @@ -251,6 +251,7 @@ enum vmcs_field { #define EXIT_REASON_MSR_READ 31 #define EXIT_REASON_MSR_WRITE 32 #define EXIT_REASON_MWAIT_INSTRUCTION 36 +#define EXIT_REASON_MONITOR_INSTRUCTION 39 #define EXIT_REASON_PAUSE_INSTRUCTION 40 #define EXIT_REASON_MCE_DURING_VMENTRY 41 #define EXIT_REASON_TPR_BELOW_THRESHOLD 43 diff --git a/arch/x86/kvm/vmx.c b/arch/x86/kvm/vmx.c index d4918d6fc924..8a8e13965076 100644 --- a/arch/x86/kvm/vmx.c +++ b/arch/x86/kvm/vmx.c @@ -1224,6 +1224,8 @@ static __init int setup_vmcs_config(struct vmcs_config *vmcs_conf) CPU_BASED_USE_IO_BITMAPS | CPU_BASED_MOV_DR_EXITING | CPU_BASED_USE_TSC_OFFSETING | + CPU_BASED_MWAIT_EXITING | + CPU_BASED_MONITOR_EXITING | CPU_BASED_INVLPG_EXITING; opt = CPU_BASED_TPR_SHADOW | CPU_BASED_USE_MSR_BITMAPS | @@ -3416,6 +3418,12 @@ static int handle_pause(struct kvm_vcpu *vcpu) return 1; } +static int handle_invalid_op(struct kvm_vcpu *vcpu) +{ + kvm_queue_exception(vcpu, UD_VECTOR); + return 1; +} + /* * The exit handlers return 1 if the exit was handled fully and guest execution * may resume. Otherwise they set the kvm_run parameter to indicate what needs @@ -3453,6 +3461,8 @@ static int (*kvm_vmx_exit_handlers[])(struct kvm_vcpu *vcpu) = { [EXIT_REASON_EPT_VIOLATION] = handle_ept_violation, [EXIT_REASON_EPT_MISCONFIG] = handle_ept_misconfig, [EXIT_REASON_PAUSE_INSTRUCTION] = handle_pause, + [EXIT_REASON_MWAIT_INSTRUCTION] = handle_invalid_op, + [EXIT_REASON_MONITOR_INSTRUCTION] = handle_invalid_op, }; static const int kvm_vmx_max_exit_handlers = -- cgit v1.2.3