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| author | Eduardo Habkost <ehabkost@redhat.com> | 2015-11-04 19:24:45 -0200 |
|---|---|---|
| committer | Eduardo Habkost <ehabkost@redhat.com> | 2015-11-06 12:03:12 -0200 |
| commit | 5e1fac2dba7780e0cb2c022d4b39586af70bea0d (patch) | |
| tree | 147b34ebc668fc5953a5e5a392d9641ed281f349 /target-i386 | |
| parent | 4b59f39bc9a03afcc74b2fa28da7c3189fca507c (diff) | |
| download | qemu-5e1fac2dba7780e0cb2c022d4b39586af70bea0d.tar.gz qemu-5e1fac2dba7780e0cb2c022d4b39586af70bea0d.tar.bz2 qemu-5e1fac2dba7780e0cb2c022d4b39586af70bea0d.zip | |
target-i386: tcg: Accept clwb instruction
Accept the clwb instruction (66 0F AE /6) if its corresponding feature
flag is enabled on CPUID[7].
Reviewed-by: Richard Henderson <rth@twiddle.net>
Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
Diffstat (limited to 'target-i386')
| -rw-r--r-- | target-i386/translate.c | 13 |
1 files changed, 12 insertions, 1 deletions
diff --git a/target-i386/translate.c b/target-i386/translate.c index b400d2470a..c6d9be6043 100644 --- a/target-i386/translate.c +++ b/target-i386/translate.c @@ -7716,10 +7716,21 @@ static target_ulong disas_insn(CPUX86State *env, DisasContext *s, } break; case 5: /* lfence */ - case 6: /* mfence */ if ((modrm & 0xc7) != 0xc0 || !(s->cpuid_features & CPUID_SSE2)) goto illegal_op; break; + case 6: /* mfence/clwb */ + if (s->prefix & PREFIX_DATA) { + /* clwb */ + if (!(s->cpuid_7_0_ebx_features & CPUID_7_0_EBX_CLWB)) + goto illegal_op; + gen_nop_modrm(env, s, modrm); + } else { + /* mfence */ + if ((modrm & 0xc7) != 0xc0 || !(s->cpuid_features & CPUID_SSE2)) + goto illegal_op; + } + break; case 7: /* sfence / clflush */ if ((modrm & 0xc7) == 0xc0) { /* sfence */ |