Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
KVM: x86: Introduce EM_ASM_1SRC2
Replace the FASTOP1SRC2*() instructions.
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Acked-by: Sean Christopherson <seanjc@google.com>
Link: https://lkml.kernel.org/r/20250714103440.394654786@infradead.org
+26
-8
+26
-8
arch/x86/kvm/emulate.c
+26
-8
arch/x86/kvm/emulate.c
···
317
317
ON64(case 8: __EM_ASM_1(op##q, rax); break;) \
318
318
EM_ASM_END
319
319
320
+
/* 1-operand, using "c" (src2) */
321
+
#define EM_ASM_1SRC2(op, name) \
322
+
EM_ASM_START(name) \
323
+
case 1: __EM_ASM_1(op##b, cl); break; \
324
+
case 2: __EM_ASM_1(op##w, cx); break; \
325
+
case 4: __EM_ASM_1(op##l, ecx); break; \
326
+
ON64(case 8: __EM_ASM_1(op##q, rcx); break;) \
327
+
EM_ASM_END
328
+
329
+
/* 1-operand, using "c" (src2) with exception */
330
+
#define EM_ASM_1SRC2EX(op, name) \
331
+
EM_ASM_START(name) \
332
+
case 1: __EM_ASM_1_EX(op##b, cl); break; \
333
+
case 2: __EM_ASM_1_EX(op##w, cx); break; \
334
+
case 4: __EM_ASM_1_EX(op##l, ecx); break; \
335
+
ON64(case 8: __EM_ASM_1_EX(op##q, rcx); break;) \
336
+
EM_ASM_END
337
+
320
338
/* 2-operand, using "a" (dst), "d" (src) */
321
339
#define EM_ASM_2(op) \
322
340
EM_ASM_START(op) \
···
1092
1074
EM_ASM_2(test);
1093
1075
EM_ASM_2(xadd);
1094
1076
1095
-
FASTOP1SRC2(mul, mul_ex);
1096
-
FASTOP1SRC2(imul, imul_ex);
1097
-
FASTOP1SRC2EX(div, div_ex);
1098
-
FASTOP1SRC2EX(idiv, idiv_ex);
1077
+
EM_ASM_1SRC2(mul, mul_ex);
1078
+
EM_ASM_1SRC2(imul, imul_ex);
1079
+
EM_ASM_1SRC2EX(div, div_ex);
1080
+
EM_ASM_1SRC2EX(idiv, idiv_ex);
1099
1081
1100
1082
FASTOP3WCL(shld);
1101
1083
FASTOP3WCL(shrd);
···
4121
4103
I(DstMem | SrcImm | NoWrite, em_test),
4122
4104
I(DstMem | SrcNone | Lock, em_not),
4123
4105
I(DstMem | SrcNone | Lock, em_neg),
4124
-
F(DstXacc | Src2Mem, em_mul_ex),
4125
-
F(DstXacc | Src2Mem, em_imul_ex),
4126
-
F(DstXacc | Src2Mem, em_div_ex),
4127
-
F(DstXacc | Src2Mem, em_idiv_ex),
4106
+
I(DstXacc | Src2Mem, em_mul_ex),
4107
+
I(DstXacc | Src2Mem, em_imul_ex),
4108
+
I(DstXacc | Src2Mem, em_div_ex),
4109
+
I(DstXacc | Src2Mem, em_idiv_ex),
4128
4110
};
4129
4111
4130
4112
static const struct opcode group4[] = {