KVM: x86 emulator: implement CWD (opcode 99) (61429142) · Commits · e / devices / android_kernel_fairphone_FP5

arch/x86/kvm/emulate.c

+14 −1

Original line number	Diff line number	Diff line
		@@ -2280,6 +2280,18 @@ static int em_imul_3op(struct x86_emulate_ctxt *ctxt)
		return em_imul(ctxt);
		}

		static int em_cwd(struct x86_emulate_ctxt *ctxt)
		{
		struct decode_cache *c = &ctxt->decode;

		c->dst.type = OP_REG;
		c->dst.bytes = c->src.bytes;
		c->dst.addr.reg = &c->regs[VCPU_REGS_RDX];
		c->dst.val = ~((c->src.val >> (c->src.bytes * 8 - 1)) - 1);

		return X86EMUL_CONTINUE;
		}

		static int em_rdtsc(struct x86_emulate_ctxt *ctxt)
		{
		unsigned cpl = ctxt->ops->cpl(ctxt->vcpu);
		@@ -2425,7 +2437,8 @@ static struct opcode opcode_table[256] = {
		/* 0x90 - 0x97 */
		X8(D(SrcAcc \| DstReg)),
		/* 0x98 - 0x9F */
		D(DstAcc \| SrcNone), N, D(SrcImmFAddr \| No64), N,
		D(DstAcc \| SrcNone), I(ImplicitOps \| SrcAcc, em_cwd),
		D(SrcImmFAddr \| No64), N,
		D(ImplicitOps \| Stack), D(ImplicitOps \| Stack), N, N,
		/* 0xA0 - 0xA7 */
		D(ByteOp \| DstAcc \| SrcMem \| Mov \| MemAbs), D(DstAcc \| SrcMem \| Mov \| MemAbs),