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KVM: x86: Introduce EM_ASM_1SRC2

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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
This commit is contained in:
Peter Zijlstra 2025-04-26 12:40:12 +02:00
parent 67e944aff6
commit af4fe07aa1
1 changed files with 26 additions and 8 deletions
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34
arch/x86/kvm/emulate.c
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@ -317,6 +317,24 @@ static int em_##op(struct x86_emulate_ctxt *ctxt) \
ON64(case 8: __EM_ASM_1(op##q, rax); break;) \
EM_ASM_END
/* 1-operand, using "c" (src2) */
#define EM_ASM_1SRC2(op, name) \
EM_ASM_START(name) \
case 1: __EM_ASM_1(op##b, cl); break; \
case 2: __EM_ASM_1(op##w, cx); break; \
case 4: __EM_ASM_1(op##l, ecx); break; \
ON64(case 8: __EM_ASM_1(op##q, rcx); break;) \
EM_ASM_END
/* 1-operand, using "c" (src2) with exception */
#define EM_ASM_1SRC2EX(op, name) \
EM_ASM_START(name) \
case 1: __EM_ASM_1_EX(op##b, cl); break; \
case 2: __EM_ASM_1_EX(op##w, cx); break; \
case 4: __EM_ASM_1_EX(op##l, ecx); break; \
ON64(case 8: __EM_ASM_1_EX(op##q, rcx); break;) \
EM_ASM_END
/* 2-operand, using "a" (dst), "d" (src) */
#define EM_ASM_2(op) \
EM_ASM_START(op) \
@ -1074,10 +1092,10 @@ EM_ASM_2(cmp);
EM_ASM_2(test);
EM_ASM_2(xadd);
FASTOP1SRC2(mul, mul_ex);
FASTOP1SRC2(imul, imul_ex);
FASTOP1SRC2EX(div, div_ex);
FASTOP1SRC2EX(idiv, idiv_ex);
EM_ASM_1SRC2(mul, mul_ex);
EM_ASM_1SRC2(imul, imul_ex);
EM_ASM_1SRC2EX(div, div_ex);
EM_ASM_1SRC2EX(idiv, idiv_ex);
FASTOP3WCL(shld);
FASTOP3WCL(shrd);
@ -4103,10 +4121,10 @@ static const struct opcode group3[] = {
I(DstMem | SrcImm | NoWrite, em_test),
I(DstMem | SrcNone | Lock, em_not),
I(DstMem | SrcNone | Lock, em_neg),
F(DstXacc | Src2Mem, em_mul_ex),
F(DstXacc | Src2Mem, em_imul_ex),
F(DstXacc | Src2Mem, em_div_ex),
F(DstXacc | Src2Mem, em_idiv_ex),
I(DstXacc | Src2Mem, em_mul_ex),
I(DstXacc | Src2Mem, em_imul_ex),
I(DstXacc | Src2Mem, em_div_ex),
I(DstXacc | Src2Mem, em_idiv_ex),
};
static const struct opcode group4[] = {