diff options
| author | Avi Kivity <avi.kivity@gmail.com> | 2013-01-04 16:18:50 +0200 |
|---|---|---|
| committer | Marcelo Tosatti <mtosatti@redhat.com> | 2013-01-09 17:39:18 -0200 |
| commit | b6744dc3fb55fda7cfcb53beecfa056f02415e6d (patch) | |
| tree | 4e0103e988c64576910bca7a7540f6b20a875f38 /arch/x86/kvm/emulate.c | |
| parent | b7d491e7f065b5b957a27a65c9e7cd3ef96b2736 (diff) | |
KVM: x86 emulator: introduce NoWrite flag
Instead of disabling writeback via OP_NONE, just specify NoWrite.
Acked-by: Gleb Natapov <gleb@redhat.com>
Signed-off-by: Avi Kivity <avi.kivity@gmail.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
Diffstat (limited to 'arch/x86/kvm/emulate.c')
| -rw-r--r-- | arch/x86/kvm/emulate.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/arch/x86/kvm/emulate.c b/arch/x86/kvm/emulate.c index 42c53c8071b..fe113fbb373 100644 --- a/arch/x86/kvm/emulate.c +++ b/arch/x86/kvm/emulate.c @@ -151,6 +151,7 @@ #define Unaligned ((u64)1 << 42) /* Explicitly unaligned (e.g. MOVDQU) */ #define Avx ((u64)1 << 43) /* Advanced Vector Extensions */ #define Fastop ((u64)1 << 44) /* Use opcode::u.fastop */ +#define NoWrite ((u64)1 << 45) /* No writeback */ #define X2(x...) x, x #define X3(x...) X2(x), x @@ -1633,6 +1634,9 @@ static int writeback(struct x86_emulate_ctxt *ctxt) { int rc; + if (ctxt->d & NoWrite) + return X86EMUL_CONTINUE; + switch (ctxt->dst.type) { case OP_REG: write_register_operand(&ctxt->dst); |