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| author | Joerg Roedel <joerg.roedel@amd.com> | 2007-03-21 19:47:00 +0100 |
|---|---|---|
| committer | Avi Kivity <avi@qumranet.com> | 2007-05-03 10:52:26 +0300 |
| commit | 916ce2360fadc71d924e02403b31280112a31280 (patch) | |
| tree | 6cdb3c1e122cb25e18f1848c151aacc356c06fde | |
| parent | 0e5bf0d0e449f6597870570e8dd17e78ba4d75ff (diff) | |
| download | linux-3.10-916ce2360fadc71d924e02403b31280112a31280.tar.gz linux-3.10-916ce2360fadc71d924e02403b31280112a31280.tar.bz2 linux-3.10-916ce2360fadc71d924e02403b31280112a31280.zip | |
KVM: SVM: forbid guest to execute monitor/mwait
This patch forbids the guest to execute monitor/mwait instructions on
SVM. This is necessary because the guest can execute these instructions
if they are available even if the kvm cpuid doesn't report its
existence.
Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
Signed-off-by: Avi Kivity <avi@qumranet.com>
| -rw-r--r-- | drivers/kvm/svm.c | 6 | ||||
| -rw-r--r-- | drivers/kvm/svm.h | 6 |
2 files changed, 11 insertions, 1 deletions
diff --git a/drivers/kvm/svm.c b/drivers/kvm/svm.c index ddc0505c337..0542d3357ce 100644 --- a/drivers/kvm/svm.c +++ b/drivers/kvm/svm.c @@ -511,7 +511,9 @@ static void init_vmcb(struct vmcb *vmcb) (1ULL << INTERCEPT_VMSAVE) | (1ULL << INTERCEPT_STGI) | (1ULL << INTERCEPT_CLGI) | - (1ULL << INTERCEPT_SKINIT); + (1ULL << INTERCEPT_SKINIT) | + (1ULL << INTERCEPT_MONITOR) | + (1ULL << INTERCEPT_MWAIT); control->iopm_base_pa = iopm_base; control->msrpm_base_pa = msrpm_base; @@ -1292,6 +1294,8 @@ static int (*svm_exit_handlers[])(struct kvm_vcpu *vcpu, [SVM_EXIT_STGI] = invalid_op_interception, [SVM_EXIT_CLGI] = invalid_op_interception, [SVM_EXIT_SKINIT] = invalid_op_interception, + [SVM_EXIT_MONITOR] = invalid_op_interception, + [SVM_EXIT_MWAIT] = invalid_op_interception, }; diff --git a/drivers/kvm/svm.h b/drivers/kvm/svm.h index df731c3fb58..5e93814400c 100644 --- a/drivers/kvm/svm.h +++ b/drivers/kvm/svm.h @@ -44,6 +44,9 @@ enum { INTERCEPT_RDTSCP, INTERCEPT_ICEBP, INTERCEPT_WBINVD, + INTERCEPT_MONITOR, + INTERCEPT_MWAIT, + INTERCEPT_MWAIT_COND, }; @@ -298,6 +301,9 @@ struct __attribute__ ((__packed__)) vmcb { #define SVM_EXIT_RDTSCP 0x087 #define SVM_EXIT_ICEBP 0x088 #define SVM_EXIT_WBINVD 0x089 +#define SVM_EXIT_MONITOR 0x08a +#define SVM_EXIT_MWAIT 0x08b +#define SVM_EXIT_MWAIT_COND 0x08c #define SVM_EXIT_NPF 0x400 #define SVM_EXIT_ERR -1 |