Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
KVM: x86: Introduce EM_ASM_2CL
Replace the FASTOP2CL instructions.
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Acked-by: Sean Christopherson <seanjc@google.com>
Link: https://lkml.kernel.org/r/20250714103440.251039692@infradead.org
+24
-15
+24
-15
arch/x86/kvm/emulate.c
+24
-15
arch/x86/kvm/emulate.c
···
344
344
ON64(case 8: __EM_ASM_2(op##q, rax, rdx); break;) \
345
345
EM_ASM_END
346
346
347
+
/* 2-operand, using "a" (dst) and CL (src2) */
348
+
#define EM_ASM_2CL(op) \
349
+
EM_ASM_START(op) \
350
+
case 1: __EM_ASM_2(op##b, al, cl); break; \
351
+
case 2: __EM_ASM_2(op##w, ax, cl); break; \
352
+
case 4: __EM_ASM_2(op##l, eax, cl); break; \
353
+
ON64(case 8: __EM_ASM_2(op##q, rax, cl); break;) \
354
+
EM_ASM_END
355
+
347
356
/*
348
357
* fastop functions have a special calling convention:
349
358
*
···
1089
1080
EM_ASM_1(inc);
1090
1081
EM_ASM_1(dec);
1091
1082
1092
-
FASTOP2CL(rol);
1093
-
FASTOP2CL(ror);
1094
-
FASTOP2CL(rcl);
1095
-
FASTOP2CL(rcr);
1096
-
FASTOP2CL(shl);
1097
-
FASTOP2CL(shr);
1098
-
FASTOP2CL(sar);
1083
+
EM_ASM_2CL(rol);
1084
+
EM_ASM_2CL(ror);
1085
+
EM_ASM_2CL(rcl);
1086
+
EM_ASM_2CL(rcr);
1087
+
EM_ASM_2CL(shl);
1088
+
EM_ASM_2CL(shr);
1089
+
EM_ASM_2CL(sar);
1099
1090
1100
1091
EM_ASM_2W(bsf);
1101
1092
EM_ASM_2W(bsr);
···
4088
4079
};
4089
4080
4090
4081
static const struct opcode group2[] = {
4091
-
F(DstMem | ModRM, em_rol),
4092
-
F(DstMem | ModRM, em_ror),
4093
-
F(DstMem | ModRM, em_rcl),
4094
-
F(DstMem | ModRM, em_rcr),
4095
-
F(DstMem | ModRM, em_shl),
4096
-
F(DstMem | ModRM, em_shr),
4097
-
F(DstMem | ModRM, em_shl),
4098
-
F(DstMem | ModRM, em_sar),
4082
+
I(DstMem | ModRM, em_rol),
4083
+
I(DstMem | ModRM, em_ror),
4084
+
I(DstMem | ModRM, em_rcl),
4085
+
I(DstMem | ModRM, em_rcr),
4086
+
I(DstMem | ModRM, em_shl),
4087
+
I(DstMem | ModRM, em_shr),
4088
+
I(DstMem | ModRM, em_shl),
4089
+
I(DstMem | ModRM, em_sar),
4099
4090
};
4100
4091
4101
4092
static const struct opcode group3[] = {