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Commit bf608f88 authored by Joerg Roedel's avatar Joerg Roedel Committed by Avi Kivity
Browse files

KVM: SVM: Add intercept checks for one-byte instructions 



This patch add intercept checks for emulated one-byte
instructions to the KVM instruction emulation path.

Signed-off-by: default avatarJoerg Roedel <joerg.roedel@amd.com>
Signed-off-by: default avatarAvi Kivity <avi@redhat.com>
parent 8061252e

arch/x86/kvm/emulate.c

+2 −2
Original line number Diff line number Diff line
@@ -2789,7 +2789,7 @@ static struct opcode opcode_table[256] = { 
	D(DstMem | SrcNone | ModRM | Mov), D(ModRM | SrcMem | NoAccess | DstReg),

	D(ImplicitOps | SrcMem16 | ModRM), G(0, group1A),

	/* 0x90 - 0x97 */

	X8(D(SrcAcc | DstReg)),

	DI(SrcAcc | DstReg, pause), X7(D(SrcAcc | DstReg)),

	/* 0x98 - 0x9F */

	D(DstAcc | SrcNone), I(ImplicitOps | SrcAcc, em_cwd),

	I(SrcImmFAddr | No64, em_call_far), N,
@@ -2831,7 +2831,7 @@ static struct opcode opcode_table[256] = { 
	D(SrcImmFAddr | No64), D(SrcImmByte | ImplicitOps),

	D2bv(SrcNone | DstAcc),	D2bv(SrcAcc | ImplicitOps),

	/* 0xF0 - 0xF7 */

	N, N, N, N,

	N, DI(ImplicitOps, icebp), N, N,

	DI(ImplicitOps | Priv, hlt), D(ImplicitOps),

	G(ByteOp, group3), G(0, group3),

	/* 0xF8 - 0xFF */

arch/x86/kvm/svm.c

+14 −0
Original line number Diff line number Diff line
@@ -3918,6 +3918,13 @@ static struct __x86_intercept { 
	[x86_intercept_rdpmc]		= POST_EX(SVM_EXIT_RDPMC),

	[x86_intercept_cpuid]		= PRE_EX(SVM_EXIT_CPUID),

	[x86_intercept_rsm]		= PRE_EX(SVM_EXIT_RSM),

	[x86_intercept_pause]		= PRE_EX(SVM_EXIT_PAUSE),

	[x86_intercept_pushf]		= PRE_EX(SVM_EXIT_PUSHF),

	[x86_intercept_popf]		= PRE_EX(SVM_EXIT_POPF),

	[x86_intercept_intn]		= PRE_EX(SVM_EXIT_SWINT),

	[x86_intercept_iret]		= PRE_EX(SVM_EXIT_IRET),

	[x86_intercept_icebp]		= PRE_EX(SVM_EXIT_ICEBP),

	[x86_intercept_hlt]		= POST_EX(SVM_EXIT_HLT),

};



#undef PRE_EX
@@ -3987,6 +3994,13 @@ static int svm_check_intercept(struct kvm_vcpu *vcpu, 
		else

			vmcb->control.exit_info_1 = 0;

		break;

	case SVM_EXIT_PAUSE:

		/*

		 * We get this for NOP only, but pause

		 * is rep not, check this here

		 */

		if (info->rep_prefix != REPE_PREFIX)

			goto out;

	default:

		break;

	}