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Commit 2dd7caa0 authored by Avi Kivity's avatar Avi Kivity
Browse files

KVM: x86 emulator: emulate LAHF 



Opcode 9F.

Signed-off-by: default avatarAvi Kivity <avi@redhat.com>
parent 7c068e45

arch/x86/kvm/emulate.c

+8 −1
Original line number Diff line number Diff line
@@ -3227,6 +3227,13 @@ static int em_cpuid(struct x86_emulate_ctxt *ctxt) 
	return X86EMUL_CONTINUE;

}



static int em_lahf(struct x86_emulate_ctxt *ctxt)

{

	ctxt->regs[VCPU_REGS_RAX] &= ~0xff00UL;

	ctxt->regs[VCPU_REGS_RAX] |= (ctxt->eflags & 0xff) << 8;

	return X86EMUL_CONTINUE;

}



static bool valid_cr(int nr)

{

	switch (nr) {
@@ -3622,7 +3629,7 @@ static struct opcode opcode_table[256] = { 
	D(DstAcc | SrcNone), I(ImplicitOps | SrcAcc, em_cwd),

	I(SrcImmFAddr | No64, em_call_far), N,

	II(ImplicitOps | Stack, em_pushf, pushf),

	II(ImplicitOps | Stack, em_popf, popf), N, N,

	II(ImplicitOps | Stack, em_popf, popf), N, I(ImplicitOps, em_lahf),

	/* 0xA0 - 0xA7 */

	I2bv(DstAcc | SrcMem | Mov | MemAbs, em_mov),

	I2bv(DstMem | SrcAcc | Mov | MemAbs | PageTable, em_mov),