From nobody Mon Feb 9 09:22:31 2026 Delivered-To: importer@patchew.org Received-SPF: pass (zoho.com: domain of gnu.org designates 208.118.235.17 as permitted sender) client-ip=208.118.235.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Authentication-Results: mx.zohomail.com; spf=pass (zoho.com: domain of gnu.org designates 208.118.235.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org Return-Path: Received: from lists.gnu.org (lists.gnu.org [208.118.235.17]) by mx.zohomail.com with SMTPS id 1515512894828172.81718302169884; Tue, 9 Jan 2018 07:48:14 -0800 (PST) Received: from localhost ([::1]:58961 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1eYw8M-0004Gr-2O for importer@patchew.org; Tue, 09 Jan 2018 10:48:14 -0500 Received: from eggs.gnu.org ([2001:4830:134:3::10]:43180) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1eYw6A-00031U-N0 for qemu-devel@nongnu.org; Tue, 09 Jan 2018 10:45:59 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1eYw69-0003ok-L5 for qemu-devel@nongnu.org; Tue, 09 Jan 2018 10:45:58 -0500 Received: from mx1.redhat.com ([209.132.183.28]:44246) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1eYw69-0003o6-C7 for qemu-devel@nongnu.org; Tue, 09 Jan 2018 10:45:57 -0500 Received: from smtp.corp.redhat.com (int-mx06.intmail.prod.int.phx2.redhat.com [10.5.11.16]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id 7DB50C053FA7 for ; Tue, 9 Jan 2018 15:45:56 +0000 (UTC) Received: from localhost (ovpn-116-66.gru2.redhat.com [10.97.116.66]) by smtp.corp.redhat.com (Postfix) with ESMTP id E43BC63139; Tue, 9 Jan 2018 15:45:52 +0000 (UTC) From: Eduardo Habkost To: qemu-devel@nongnu.org Date: Tue, 9 Jan 2018 13:45:16 -0200 Message-Id: <20180109154519.25634-5-ehabkost@redhat.com> In-Reply-To: <20180109154519.25634-1-ehabkost@redhat.com> References: <20180109154519.25634-1-ehabkost@redhat.com> X-Scanned-By: MIMEDefang 2.79 on 10.5.11.16 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.32]); Tue, 09 Jan 2018 15:45:56 +0000 (UTC) X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] [fuzzy] X-Received-From: 209.132.183.28 Subject: [Qemu-devel] [PATCH 4/7] i386: Add FEAT_8000_0008_EBX CPUID feature word X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Paolo Bonzini Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" X-ZohoMail: RSF_0 Z_629925259 SPT_0 Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Add the new feature word and the "ibpb" feature flag. Based on a patch by Paolo Bonzini. Signed-off-by: Eduardo Habkost --- target/i386/cpu.h | 3 +++ target/i386/cpu.c | 19 ++++++++++++++++++- 2 files changed, 21 insertions(+), 1 deletion(-) diff --git a/target/i386/cpu.h b/target/i386/cpu.h index de387c1311..f7df5b4f9c 100644 --- a/target/i386/cpu.h +++ b/target/i386/cpu.h @@ -472,6 +472,7 @@ typedef enum FeatureWord { FEAT_8000_0001_EDX, /* CPUID[8000_0001].EDX */ FEAT_8000_0001_ECX, /* CPUID[8000_0001].ECX */ FEAT_8000_0007_EDX, /* CPUID[8000_0007].EDX */ + FEAT_8000_0008_EBX, /* CPUID[8000_0008].EBX */ FEAT_C000_0001_EDX, /* CPUID[C000_0001].EDX */ FEAT_KVM, /* CPUID[4000_0001].EAX (KVM_CPUID_FEATURES) */ FEAT_HYPERV_EAX, /* CPUID[4000_0003].EAX */ @@ -669,6 +670,8 @@ typedef uint32_t FeatureWordArray[FEATURE_WORDS]; #define CPUID_7_0_EDX_AVX512_4FMAPS (1U << 3) /* AVX512 Multiply Accumulat= ion Single Precision */ #define CPUID_7_0_EDX_SPEC_CTRL (1U << 26) /* Speculation Control */ =20 +#define CPUID_8000_0008_EBX_IBPB (1U << 12) /* Indirect Branch Predicti= on Barrier */ + #define CPUID_XSAVE_XSAVEOPT (1U << 0) #define CPUID_XSAVE_XSAVEC (1U << 1) #define CPUID_XSAVE_XGETBV1 (1U << 2) diff --git a/target/i386/cpu.c b/target/i386/cpu.c index 1be1642eb2..968848a362 100644 --- a/target/i386/cpu.c +++ b/target/i386/cpu.c @@ -483,6 +483,22 @@ static FeatureWordInfo feature_word_info[FEATURE_WORDS= ] =3D { .tcg_features =3D TCG_APM_FEATURES, .unmigratable_flags =3D CPUID_APM_INVTSC, }, + [FEAT_8000_0008_EBX] =3D { + .feat_names =3D { + NULL, NULL, NULL, NULL, + NULL, NULL, NULL, NULL, + NULL, NULL, NULL, NULL, + "ibpb", NULL, NULL, NULL, + NULL, NULL, NULL, NULL, + NULL, NULL, NULL, NULL, + NULL, NULL, NULL, NULL, + NULL, NULL, NULL, NULL, + }, + .cpuid_eax =3D 0x80000008, + .cpuid_reg =3D R_EBX, + .tcg_features =3D 0, + .unmigratable_flags =3D 0, + }, [FEAT_XSAVE] =3D { .feat_names =3D { "xsaveopt", "xsavec", "xgetbv1", "xsaves", @@ -3126,7 +3142,7 @@ void cpu_x86_cpuid(CPUX86State *env, uint32_t index, = uint32_t count, } else { *eax =3D cpu->phys_bits; } - *ebx =3D 0; + *ebx =3D env->features[FEAT_8000_0008_EBX]; *ecx =3D 0; *edx =3D 0; if (cs->nr_cores * cs->nr_threads > 1) { @@ -3589,6 +3605,7 @@ static void x86_cpu_expand_features(X86CPU *cpu, Erro= r **errp) x86_cpu_adjust_feat_level(cpu, FEAT_8000_0001_EDX); x86_cpu_adjust_feat_level(cpu, FEAT_8000_0001_ECX); x86_cpu_adjust_feat_level(cpu, FEAT_8000_0007_EDX); + x86_cpu_adjust_feat_level(cpu, FEAT_8000_0008_EBX); x86_cpu_adjust_feat_level(cpu, FEAT_C000_0001_EDX); x86_cpu_adjust_feat_level(cpu, FEAT_SVM); x86_cpu_adjust_feat_level(cpu, FEAT_XSAVE); --=20 2.14.3