From nobody Fri Dec 19 18:44:28 2025 Delivered-To: importer@patchew.org Authentication-Results: mx.zohomail.com; dkim=fail; spf=pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org; dmarc=fail(p=none dis=none) header.from=redhat.com Return-Path: Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) by mx.zohomail.com with SMTPS id 1613395891899379.01348563230613; Mon, 15 Feb 2021 05:31:31 -0800 (PST) Received: from localhost ([::1]:49566 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1lBdyM-0000YY-Q8 for importer@patchew.org; Mon, 15 Feb 2021 08:31:30 -0500 Received: from eggs.gnu.org ([2001:470:142:3::10]:60096) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1lBdk6-0005la-0o for qemu-devel@nongnu.org; Mon, 15 Feb 2021 08:16:47 -0500 Received: from mail-ej1-x629.google.com ([2a00:1450:4864:20::629]:36934) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.90_1) (envelope-from ) id 1lBdk4-0005bJ-JA for qemu-devel@nongnu.org; Mon, 15 Feb 2021 08:16:45 -0500 Received: by mail-ej1-x629.google.com with SMTP id jj19so11089683ejc.4 for ; Mon, 15 Feb 2021 05:16:44 -0800 (PST) Received: from avogadro.lan ([2001:b07:6468:f312:c8dd:75d4:99ab:290a]) by smtp.gmail.com with ESMTPSA id o4sm9950184edw.78.2021.02.15.05.16.39 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 15 Feb 2021 05:16:40 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=sender:from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=wOb5WqK1h7H5VvgqNLb/EnTdOMmXVIKU1eAqcJBfqNs=; b=kWFa6blpdDKXkQqlM/1dJELCLMt4tDow3aocqNQ4kJyuvYvN9SmIyEpHAGsmUiC+T8 QXeHTKh9b3BNtvLONzU0IvL5e11UAUrwlhPsYvoBNkYMrWmAShO0ZSomPXt85PWkJo3j 0bDSKSOtJivlvUjmQWhol/PB/VcsdQp3N3hEBErpTZB6Odh4k9GEBiopFV+7P63IBGq4 EgcqTRbpbasHWmlWncPBdM6TyqnDhgZW1Yt3bkXxLLLDQV0Km8A6HfBh+tp+FraLqIXV WNGR00F7dQfv6P6eIW8hQNG8diHma/6Ityxh4uRxRJf6n0y0R44y/c2PuMg0rYhQhS4V A0IQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:sender:from:to:cc:subject:date:message-id :in-reply-to:references:mime-version:content-transfer-encoding; bh=wOb5WqK1h7H5VvgqNLb/EnTdOMmXVIKU1eAqcJBfqNs=; b=bz5ySZOXb9IYGFYHfnfhUPeQzvbxb0RVLNfnMxBPovBNZ7BLroC5am3BiSwkVNSAxl z3LPvONlOz7yY0VIJeN8Nl6bV/V09L4rShDaUKeR/A/bYHAyreeD+oSD3mgGxz2Blp50 2vkv12fD+beKmH7YfJalWVCid3s7OrsTMzwmTHDrYVvMYOfGteLyLJXNuIKVVQSRv5dJ n8ErcXEsGOyX801EkOwNACcu0JKJLPV/Hqmtpv5UeAqwn8L3TgKX5G+3sjRDyeEiat1J b2qf+SEIV88gS89BTX2p4csplYRCQF2SXy6ZzNUDfo2NnERjtl8JIOEz6ld/uI4S2B+7 k07Q== X-Gm-Message-State: AOAM531aE6vfu1l62mT9YK0xkRCheMBYnGMdUNcNm7J+ryt23RQ+XS1F BGBufYzErlRhxJPXWi+m8dSMp6HLe5M= X-Google-Smtp-Source: ABdhPJy0GcvzQOH+ShVIbwnGNXlRF/2zmOo2zT3LUi7tBTOvBuHlzflQLDNtg3vwQNN5BWXjwNuBZw== X-Received: by 2002:a17:907:3e06:: with SMTP id hp6mr15523255ejc.254.1613395000562; Mon, 15 Feb 2021 05:16:40 -0800 (PST) From: Paolo Bonzini To: qemu-devel@nongnu.org Subject: [PULL 18/19] target/i386/hvf: add rdmsr 35H MSR_CORE_THREAD_COUNT Date: Mon, 15 Feb 2021 14:16:25 +0100 Message-Id: <20210215131626.65640-19-pbonzini@redhat.com> X-Mailer: git-send-email 2.29.2 In-Reply-To: <20210215131626.65640-1-pbonzini@redhat.com> References: <20210215131626.65640-1-pbonzini@redhat.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Received-SPF: pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) client-ip=209.51.188.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Received-SPF: pass client-ip=2a00:1450:4864:20::629; envelope-from=paolo.bonzini@gmail.com; helo=mail-ej1-x629.google.com X-Spam_score_int: -14 X-Spam_score: -1.5 X-Spam_bar: - X-Spam_report: (-1.5 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_EF=-0.1, FREEMAIL_FORGED_FROMDOMAIN=0.249, FREEMAIL_FROM=0.001, HEADER_FROM_DIFFERENT_DOMAINS=0.249, RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=no autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Roman Bolshakov , Vladislav Yaroshchuk Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" X-ZohoMail-DKIM: fail (Header signature does not verify) Content-Type: text/plain; charset="utf-8" From: Vladislav Yaroshchuk Some guests (ex. Darwin-XNU) can attemp to read this MSR to retrieve and validate CPU topology comparing it to ACPI MADT content MSR description from Intel Manual: 35H: MSR_CORE_THREAD_COUNT: Configured State of Enabled Processor Core Count and Logical Processor Count Bits 15:0 THREAD_COUNT The number of logical processors that are currently enabled in the physical package Bits 31:16 Core_COUNT The number of processor cores that are currently enabled in the physical package Bits 63:32 Reserved Signed-off-by: Vladislav Yaroshchuk Message-Id: <20210113205323.33310-1-yaroshchuk2000@gmail.com> [RB: reordered MSR definition and dropped u suffix from shift offset] Signed-off-by: Roman Bolshakov Signed-off-by: Paolo Bonzini --- target/i386/cpu.h | 1 + target/i386/hvf/x86_emu.c | 5 +++++ 2 files changed, 6 insertions(+) diff --git a/target/i386/cpu.h b/target/i386/cpu.h index 8d599bb5b8..82c1ac00ef 100644 --- a/target/i386/cpu.h +++ b/target/i386/cpu.h @@ -368,6 +368,7 @@ typedef enum X86Seg { =20 #define MSR_IA32_SMBASE 0x9e #define MSR_SMI_COUNT 0x34 +#define MSR_CORE_THREAD_COUNT 0x35 #define MSR_MTRRcap 0xfe #define MSR_MTRRcap_VCNT 8 #define MSR_MTRRcap_FIXRANGE_SUPPORT (1 << 8) diff --git a/target/i386/hvf/x86_emu.c b/target/i386/hvf/x86_emu.c index da570e352b..e52c39ddb1 100644 --- a/target/i386/hvf/x86_emu.c +++ b/target/i386/hvf/x86_emu.c @@ -668,6 +668,7 @@ void simulate_rdmsr(struct CPUState *cpu) { X86CPU *x86_cpu =3D X86_CPU(cpu); CPUX86State *env =3D &x86_cpu->env; + CPUState *cs =3D env_cpu(env); uint32_t msr =3D ECX(env); uint64_t val =3D 0; =20 @@ -745,6 +746,10 @@ void simulate_rdmsr(struct CPUState *cpu) case MSR_MTRRdefType: val =3D env->mtrr_deftype; break; + case MSR_CORE_THREAD_COUNT: + val =3D cs->nr_threads * cs->nr_cores; /* thread count, bits 15..0= */ + val |=3D ((uint32_t)cs->nr_cores << 16); /* core count, bits 31..1= 6 */ + break; default: /* fprintf(stderr, "%s: unknown msr 0x%x\n", __func__, msr); */ val =3D 0; --=20 2.29.2