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KVM: x86 emulator: Support for declaring single operand fastops 

Acked-by: Gleb Natapov <gleb@redhat.com>
Signed-off-by: Avi Kivity <avi.kivity@gmail.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
This commit is contained in:
Avi Kivity 2013-01-04 16:18:49 +02:00 committed by Marcelo Tosatti
parent e28bbd44da
commit b7d491e7f0
1 changed files with 25 additions and 0 deletions
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25
arch/x86/kvm/emulate.c
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@ -24,6 +24,7 @@
#include "kvm_cache_regs.h"
#include <linux/module.h>
#include <asm/kvm_emulate.h>
#include <linux/stringify.h>
#include "x86.h"
#include "tss.h"
@ -439,6 +440,30 @@ static void invalidate_registers(struct x86_emulate_ctxt *ctxt)
} \
} while (0)
#define FOP_ALIGN ".align " __stringify(FASTOP_SIZE) " \n\t"
#define FOP_RET "ret \n\t"
#define FOP_START(op) \
extern void em_##op(struct fastop *fake); \
asm(".pushsection .text, \"ax\" \n\t" \
".global em_" #op " \n\t" \
FOP_ALIGN \
"em_" #op ": \n\t"
#define FOP_END \
".popsection")
#define FOP1E(op, dst) \
FOP_ALIGN #op " %" #dst " \n\t" FOP_RET
#define FASTOP1(op) \
FOP_START(op) \
FOP1E(op##b, al) \
FOP1E(op##w, ax) \
FOP1E(op##l, eax) \
ON64(FOP1E(op##q, rax)) \
FOP_END
#define __emulate_1op_rax_rdx(ctxt, _op, _suffix, _ex) \
do { \
unsigned long _tmp; \