From: Gleb Natapov <[email protected]> Currently the exit is unhandled, so guest halts with error if it tries to execute INVD instruction. Call into emulator when INVD instruction is executed by a guest instead. This instruction is not needed by ordinary guests, but firmware (like OpenBIOS) use it and fail.
Signed-off-by: Gleb Natapov <[email protected]> Signed-off-by: Marcelo Tosatti <[email protected]> diff --git a/arch/x86/include/asm/vmx.h b/arch/x86/include/asm/vmx.h index 9f0cbd9..42d9590 100644 --- a/arch/x86/include/asm/vmx.h +++ b/arch/x86/include/asm/vmx.h @@ -239,6 +239,7 @@ enum vmcs_field { #define EXIT_REASON_TASK_SWITCH 9 #define EXIT_REASON_CPUID 10 #define EXIT_REASON_HLT 12 +#define EXIT_REASON_INVD 13 #define EXIT_REASON_INVLPG 14 #define EXIT_REASON_RDPMC 15 #define EXIT_REASON_RDTSC 16 diff --git a/arch/x86/kvm/vmx.c b/arch/x86/kvm/vmx.c index 993e332..200533e 100644 --- a/arch/x86/kvm/vmx.c +++ b/arch/x86/kvm/vmx.c @@ -3350,6 +3350,11 @@ static int handle_vmx_insn(struct kvm_vcpu *vcpu) return 1; } +static int handle_invd(struct kvm_vcpu *vcpu) +{ + return emulate_instruction(vcpu, 0, 0, 0) == EMULATE_DONE; +} + static int handle_invlpg(struct kvm_vcpu *vcpu) { unsigned long exit_qualification = vmcs_readl(EXIT_QUALIFICATION); @@ -3650,6 +3655,7 @@ static int (*kvm_vmx_exit_handlers[])(struct kvm_vcpu *vcpu) = { [EXIT_REASON_MSR_WRITE] = handle_wrmsr, [EXIT_REASON_PENDING_INTERRUPT] = handle_interrupt_window, [EXIT_REASON_HLT] = handle_halt, + [EXIT_REASON_INVD] = handle_invd, [EXIT_REASON_INVLPG] = handle_invlpg, [EXIT_REASON_VMCALL] = handle_vmcall, [EXIT_REASON_VMCLEAR] = handle_vmx_insn, -- To unsubscribe from this list: send the line "unsubscribe kvm-commits" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
