diff options
| author | Nadav Amit <namit@cs.technion.ac.il> | 2014-09-18 22:39:44 +0300 |
|---|---|---|
| committer | Jiri Slaby <jslaby@suse.cz> | 2015-02-16 14:45:36 +0100 |
| commit | 9a4288057afa92094ebc782475a4edba07d0f26e (patch) | |
| tree | 3b551bc01034ab555e0792b40388bb3480d4a76d /arch | |
| parent | a9638450cced05855cbb366fc6dd0792375a6611 (diff) | |
KVM: vmx: Inject #GP on invalid PAT CR
commit 4566654bb9be9e8864df417bb72ceee5136b6a6a upstream.
Guest which sets the PAT CR to invalid value should get a #GP. Currently, if
vmx supports loading PAT CR during entry, then the value is not checked. This
patch makes the required check in that case.
Signed-off-by: Nadav Amit <namit@cs.technion.ac.il>
Signed-off-by: Bruce Rogers <brogers@suse.com>
Signed-off-by: Jiri Slaby <jslaby@suse.cz>
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/x86/kvm/vmx.c | 2 | ||||
| -rw-r--r-- | arch/x86/kvm/x86.c | 5 | ||||
| -rw-r--r-- | arch/x86/kvm/x86.h | 2 |
3 files changed, 7 insertions, 2 deletions
diff --git a/arch/x86/kvm/vmx.c b/arch/x86/kvm/vmx.c index 4530a72510b2..f5ddacc4c885 100644 --- a/arch/x86/kvm/vmx.c +++ b/arch/x86/kvm/vmx.c @@ -2520,6 +2520,8 @@ static int vmx_set_msr(struct kvm_vcpu *vcpu, struct msr_data *msr_info) break; case MSR_IA32_CR_PAT: if (vmcs_config.vmentry_ctrl & VM_ENTRY_LOAD_IA32_PAT) { + if (!kvm_mtrr_valid(vcpu, MSR_IA32_CR_PAT, data)) + return 1; vmcs_write64(GUEST_IA32_PAT, data); vcpu->arch.pat = data; break; diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c index 790551bc4f15..fabb62bad47c 100644 --- a/arch/x86/kvm/x86.c +++ b/arch/x86/kvm/x86.c @@ -1707,7 +1707,7 @@ static bool valid_mtrr_type(unsigned t) return t < 8 && (1 << t) & 0x73; /* 0, 1, 4, 5, 6 */ } -static bool mtrr_valid(struct kvm_vcpu *vcpu, u32 msr, u64 data) +bool kvm_mtrr_valid(struct kvm_vcpu *vcpu, u32 msr, u64 data) { int i; @@ -1733,12 +1733,13 @@ static bool mtrr_valid(struct kvm_vcpu *vcpu, u32 msr, u64 data) /* variable MTRRs */ return valid_mtrr_type(data & 0xff); } +EXPORT_SYMBOL_GPL(kvm_mtrr_valid); static int set_msr_mtrr(struct kvm_vcpu *vcpu, u32 msr, u64 data) { u64 *p = (u64 *)&vcpu->arch.mtrr_state.fixed_ranges; - if (!mtrr_valid(vcpu, msr, data)) + if (!kvm_mtrr_valid(vcpu, msr, data)) return 1; if (msr == MSR_MTRRdefType) { diff --git a/arch/x86/kvm/x86.h b/arch/x86/kvm/x86.h index 7626d3efa064..e2968a500c4e 100644 --- a/arch/x86/kvm/x86.h +++ b/arch/x86/kvm/x86.h @@ -132,6 +132,8 @@ int kvm_write_guest_virt_system(struct x86_emulate_ctxt *ctxt, gva_t addr, void *val, unsigned int bytes, struct x86_exception *exception); +bool kvm_mtrr_valid(struct kvm_vcpu *vcpu, u32 msr, u64 data); + extern u64 host_xcr0; extern unsigned int min_timer_period_us; |