From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:43827) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1Zv4tS-0006TR-8S for qemu-devel@nongnu.org; Sat, 07 Nov 2015 09:55:03 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1Zv4tR-0007zV-8z for qemu-devel@nongnu.org; Sat, 07 Nov 2015 09:55:02 -0500 Received: from mx1.redhat.com ([209.132.183.28]:41539) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1Zv4tR-0007zR-3h for qemu-devel@nongnu.org; Sat, 07 Nov 2015 09:55:01 -0500 From: Eduardo Habkost Date: Sat, 7 Nov 2015 12:54:50 -0200 Message-Id: <1446908092-13042-2-git-send-email-ehabkost@redhat.com> In-Reply-To: <1446908092-13042-1-git-send-email-ehabkost@redhat.com> References: <1446908092-13042-1-git-send-email-ehabkost@redhat.com> Subject: [Qemu-devel] [PULL 1/3] target-i386: tcg: Accept clwb instruction List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: Peter Maydell Cc: Paolo Bonzini , Richard Henderson , =?UTF-8?q?Andreas=20F=C3=A4rber?= , qemu-devel@nongnu.org Accept the clwb instruction (66 0F AE /6) if its corresponding feature flag is enabled on CPUID[7]. Reviewed-by: Richard Henderson Signed-off-by: Eduardo Habkost --- target-i386/translate.c | 13 ++++++++++++- 1 file changed, 12 insertions(+), 1 deletion(-) diff --git a/target-i386/translate.c b/target-i386/translate.c index b400d24..c6d9be6 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 */ -- 2.1.0