From mboxrd@z Thu Jan 1 00:00:00 1970 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) From: Eduardo Habkost 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> Subject: [Qemu-devel] [PATCH 4/7] i386: Add FEAT_8000_0008_EBX CPUID feature word List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: qemu-devel@nongnu.org Cc: Paolo Bonzini 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 Accumulation Single Precision */ #define CPUID_7_0_EDX_SPEC_CTRL (1U << 26) /* Speculation Control */ +#define CPUID_8000_0008_EBX_IBPB (1U << 12) /* Indirect Branch Prediction 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] = { .tcg_features = TCG_APM_FEATURES, .unmigratable_flags = CPUID_APM_INVTSC, }, + [FEAT_8000_0008_EBX] = { + .feat_names = { + 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 = 0x80000008, + .cpuid_reg = R_EBX, + .tcg_features = 0, + .unmigratable_flags = 0, + }, [FEAT_XSAVE] = { .feat_names = { "xsaveopt", "xsavec", "xgetbv1", "xsaves", @@ -3126,7 +3142,7 @@ void cpu_x86_cpuid(CPUX86State *env, uint32_t index, uint32_t count, } else { *eax = cpu->phys_bits; } - *ebx = 0; + *ebx = env->features[FEAT_8000_0008_EBX]; *ecx = 0; *edx = 0; if (cs->nr_cores * cs->nr_threads > 1) { @@ -3589,6 +3605,7 @@ static void x86_cpu_expand_features(X86CPU *cpu, Error **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); -- 2.14.3