diff options
| author | Andre Przywara <andre.przywara@amd.com> | 2010-12-21 11:12:07 +0100 |
|---|---|---|
| committer | Avi Kivity <avi@redhat.com> | 2011-01-12 11:31:07 +0200 |
| commit | dc25e89e07d5ef31c476117d2c76b34dbb22196c (patch) | |
| tree | 9fef452c4bd0704b9d74512a9a58dc5d5b742d53 /arch/x86/include/asm | |
| parent | df4f3108562dc6f6ae6648f2698df7f4c9acf52d (diff) | |
KVM: SVM: copy instruction bytes from VMCB
In case of a nested page fault or an intercepted #PF newer SVM
implementations provide a copy of the faulting instruction bytes
in the VMCB.
Use these bytes to feed the instruction emulator and avoid the costly
guest instruction fetch in this case.
Signed-off-by: Andre Przywara <andre.przywara@amd.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
Diffstat (limited to 'arch/x86/include/asm')
| -rw-r--r-- | arch/x86/include/asm/kvm_emulate.h | 2 | ||||
| -rw-r--r-- | arch/x86/include/asm/kvm_host.h | 9 | ||||
| -rw-r--r-- | arch/x86/include/asm/svm.h | 4 |
3 files changed, 9 insertions, 6 deletions
diff --git a/arch/x86/include/asm/kvm_emulate.h b/arch/x86/include/asm/kvm_emulate.h index bf70ecea397..8e37deb1eb3 100644 --- a/arch/x86/include/asm/kvm_emulate.h +++ b/arch/x86/include/asm/kvm_emulate.h @@ -265,7 +265,7 @@ struct x86_emulate_ctxt { #define X86EMUL_MODE_HOST X86EMUL_MODE_PROT64 #endif -int x86_decode_insn(struct x86_emulate_ctxt *ctxt); +int x86_decode_insn(struct x86_emulate_ctxt *ctxt, void *insn, int insn_len); #define EMULATION_FAILED -1 #define EMULATION_OK 0 #define EMULATION_RESTART 1 diff --git a/arch/x86/include/asm/kvm_host.h b/arch/x86/include/asm/kvm_host.h index de00b6026b7..6268f6ce643 100644 --- a/arch/x86/include/asm/kvm_host.h +++ b/arch/x86/include/asm/kvm_host.h @@ -634,13 +634,13 @@ enum emulation_result { #define EMULTYPE_NO_DECODE (1 << 0) #define EMULTYPE_TRAP_UD (1 << 1) #define EMULTYPE_SKIP (1 << 2) -int x86_emulate_instruction(struct kvm_vcpu *vcpu, - unsigned long cr2, int emulation_type); +int x86_emulate_instruction(struct kvm_vcpu *vcpu, unsigned long cr2, + int emulation_type, void *insn, int insn_len); static inline int emulate_instruction(struct kvm_vcpu *vcpu, int emulation_type) { - return x86_emulate_instruction(vcpu, 0, emulation_type); + return x86_emulate_instruction(vcpu, 0, emulation_type, NULL, 0); } void realmode_lgdt(struct kvm_vcpu *vcpu, u16 size, unsigned long address); @@ -721,7 +721,8 @@ int kvm_emulate_hypercall(struct kvm_vcpu *vcpu); int kvm_fix_hypercall(struct kvm_vcpu *vcpu); -int kvm_mmu_page_fault(struct kvm_vcpu *vcpu, gva_t gva, u32 error_code); +int kvm_mmu_page_fault(struct kvm_vcpu *vcpu, gva_t gva, u32 error_code, + void *insn, int insn_len); void kvm_mmu_invlpg(struct kvm_vcpu *vcpu, gva_t gva); void kvm_enable_tdp(void); diff --git a/arch/x86/include/asm/svm.h b/arch/x86/include/asm/svm.h index f0ffb818408..f2b83bc7d78 100644 --- a/arch/x86/include/asm/svm.h +++ b/arch/x86/include/asm/svm.h @@ -83,7 +83,9 @@ struct __attribute__ ((__packed__)) vmcb_control_area { u32 clean; u32 reserved_5; u64 next_rip; - u8 reserved_6[816]; + u8 insn_len; + u8 insn_bytes[15]; + u8 reserved_6[800]; }; |