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| author |   Josh Poimboeuf <jpoimboe@kernel.org> | 2022-08-18 08:53:42 -0700 |
|---|---|---|
| committer |   Paolo Bonzini <pbonzini@redhat.com> | 2022-08-19 04:05:42 -0400 |
| commit | 22472d12606c1dd3e92312f7329734e489b371ff (patch) | |
| tree | f56a8fa08d805789375fa930fdd52a797d0d01e1 /arch/x86 | |
| parent | x86/ibt, objtool: Add IBT_NOSEAL() (diff) | |
| download | linux-dev-22472d12606c1dd3e92312f7329734e489b371ff.tar.xz linux-dev-22472d12606c1dd3e92312f7329734e489b371ff.zip | |
x86/kvm: Simplify FOP_SETCC()
SETCC_ALIGN and FOP_ALIGN are both 16. Remove the special casing for
FOP_SETCC() and just make it a normal fastop.
Signed-off-by: Josh Poimboeuf <jpoimboe@kernel.org>
Message-Id: <7c13d94d1a775156f7e36eed30509b274a229140.1660837839.git.jpoimboe@kernel.org>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'arch/x86')
| -rw-r--r-- | arch/x86/kvm/emulate.c | 23 |
1 files changed, 4 insertions, 19 deletions
diff --git a/arch/x86/kvm/emulate.c b/arch/x86/kvm/emulate.c index b4eeb7c75dfa..205d566ebd72 100644 --- a/arch/x86/kvm/emulate.c +++ b/arch/x86/kvm/emulate.c @@ -446,27 +446,12 @@ static int fastop(struct x86_emulate_ctxt *ctxt, fastop_t fop); FOP_END /* Special case for SETcc - 1 instruction per cc */ - -/* - * Depending on .config the SETcc functions look like: - * - * ENDBR [4 bytes; CONFIG_X86_KERNEL_IBT] - * SETcc %al [3 bytes] - * RET | JMP __x86_return_thunk [1,5 bytes; CONFIG_RETHUNK] - * INT3 [1 byte; CONFIG_SLS] - */ -#define SETCC_ALIGN 16 - #define FOP_SETCC(op) \ - ".align " __stringify(SETCC_ALIGN) " \n\t" \ - ".type " #op ", @function \n\t" \ - #op ": \n\t" \ - ASM_ENDBR \ + FOP_FUNC(op) \ #op " %al \n\t" \ - __FOP_RET(#op) \ - ".skip " __stringify(SETCC_ALIGN) " - (.-" #op "), 0xcc \n\t" + FOP_RET(op) -__FOP_START(setcc, SETCC_ALIGN) +FOP_START(setcc) FOP_SETCC(seto) FOP_SETCC(setno) FOP_SETCC(setc) @@ -1079,7 +1064,7 @@ static int em_bsr_c(struct x86_emulate_ctxt *ctxt) static __always_inline u8 test_cc(unsigned int condition, unsigned long flags) { u8 rc; - void (*fop)(void) = (void *)em_setcc + SETCC_ALIGN * (condition & 0xf); + void (*fop)(void) = (void *)em_setcc + FASTOP_SIZE * (condition & 0xf); flags = (flags & EFLAGS_MASK) | X86_EFLAGS_IF; asm("push %[flags]; popf; " CALL_NOSPEC |