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| author | Paolo Bonzini <pbonzini@redhat.com> | 2018-07-18 19:49:01 +0300 |
|---|---|---|
| committer | Paolo Bonzini <pbonzini@redhat.com> | 2018-08-06 18:57:58 +0300 |
| commit | 7f7f1ba33cf2c21d001821313088c231db42ff40 (patch) | |
| tree | eed46700a5932890c27f8770f244c9bdb21527fc /arch/x86/include | |
| parent | fa3899add1056f209c5b61d0c60cec34775a6781 (diff) | |
| download | linux-7f7f1ba33cf2c21d001821313088c231db42ff40.tar.xz | |
KVM: x86: do not load vmcs12 pages while still in SMM
If the vCPU enters system management mode while running a nested guest,
RSM starts processing the vmentry while still in SMM. In that case,
however, the pages pointed to by the vmcs12 might be incorrectly
loaded from SMRAM. To avoid this, delay the handling of the pages
until just before the next vmentry. This is done with a new request
and a new entry in kvm_x86_ops, which we will be able to reuse for
nested VMX state migration.
Extracted from a patch by Jim Mattson and KarimAllah Ahmed.
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'arch/x86/include')
| -rw-r--r-- | arch/x86/include/asm/kvm_host.h | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/arch/x86/include/asm/kvm_host.h b/arch/x86/include/asm/kvm_host.h index c13cd28d9d1b..da957725992d 100644 --- a/arch/x86/include/asm/kvm_host.h +++ b/arch/x86/include/asm/kvm_host.h @@ -75,6 +75,7 @@ #define KVM_REQ_HV_EXIT KVM_ARCH_REQ(21) #define KVM_REQ_HV_STIMER KVM_ARCH_REQ(22) #define KVM_REQ_LOAD_EOI_EXITMAP KVM_ARCH_REQ(23) +#define KVM_REQ_GET_VMCS12_PAGES KVM_ARCH_REQ(24) #define CR0_RESERVED_BITS \ (~(unsigned long)(X86_CR0_PE | X86_CR0_MP | X86_CR0_EM | X86_CR0_TS \ @@ -1085,6 +1086,8 @@ struct kvm_x86_ops { void (*setup_mce)(struct kvm_vcpu *vcpu); + void (*get_vmcs12_pages)(struct kvm_vcpu *vcpu); + int (*smi_allowed)(struct kvm_vcpu *vcpu); int (*pre_enter_smm)(struct kvm_vcpu *vcpu, char *smstate); int (*pre_leave_smm)(struct kvm_vcpu *vcpu, u64 smbase); |