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| author | Sheng Yang <sheng@linux.intel.com> | 2009-12-15 13:29:54 +0800 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@suse.de> | 2010-03-15 09:07:09 -0700 |
| commit | 36725f4d9636cea24ce6ea463b1ba50a03315236 (patch) | |
| tree | cba2ddc32b24c56b4d6f2460f2548ca1e8927faf /arch | |
| parent | 6c46bff05fb1889ff5581dcd7274db69fd4a4da3 (diff) | |
| download | lwn-36725f4d9636cea24ce6ea463b1ba50a03315236.tar.gz lwn-36725f4d9636cea24ce6ea463b1ba50a03315236.zip | |
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 <sheng@linux.intel.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/x86/include/asm/vmx.h | 1 | ||||
| -rw-r--r-- | arch/x86/kvm/vmx.c | 10 |
2 files changed, 11 insertions, 0 deletions
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 = |