From patchwork Tue Feb 9 13:57:21 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Roman Bolshakov X-Patchwork-Id: 1438416 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Authentication-Results: ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=nongnu.org (client-ip=209.51.188.17; helo=lists.gnu.org; envelope-from=qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org; receiver=) Authentication-Results: ozlabs.org; dkim=pass (1024-bit key; unprotected) header.d=yadro.com header.i=@yadro.com header.a=rsa-sha256 header.s=mta-01 header.b=LlnbuuRY; dkim-atps=neutral Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ozlabs.org (Postfix) with ESMTPS id 4DZlWt2hxcz9s1l for ; Wed, 10 Feb 2021 01:24:26 +1100 (AEDT) Received: from localhost ([::1]:40540 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1l9TwG-0000B3-CY for incoming@patchwork.ozlabs.org; Tue, 09 Feb 2021 09:24:24 -0500 Received: from eggs.gnu.org ([2001:470:142:3::10]:42320) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1l9TWH-0001fj-Q0 for qemu-devel@nongnu.org; Tue, 09 Feb 2021 08:57:33 -0500 Received: from mta-02.yadro.com ([89.207.88.252]:56188 helo=mta-01.yadro.com) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1l9TWF-0007y7-Pe for qemu-devel@nongnu.org; Tue, 09 Feb 2021 08:57:33 -0500 Received: from localhost (unknown [127.0.0.1]) by mta-01.yadro.com (Postfix) with ESMTP id 69AD54127C; Tue, 9 Feb 2021 13:57:30 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=yadro.com; h= content-type:content-type:content-transfer-encoding:mime-version :references:in-reply-to:x-mailer:message-id:date:date:subject :subject:from:from:received:received:received; s=mta-01; t= 1612879049; x=1614693450; bh=54yn9wGwhewtmlsigr2i4DLu8msIcXhiu81 ro63Ambc=; b=LlnbuuRYZ3giMvf6J/bfxtr46OkoJnObxNYP0zwSlcToAKGlSot 8jWfmF+Q+FDgfmYLgAJCMJpq51dpXsWgzsPTvSJvX86y4tLHwuqdfTArhOqVrXje 5qy59p/d9h6BrN3VFiw0poYlhpzK66MYN70PKku16KRj84FLJ4WPtdaM= X-Virus-Scanned: amavisd-new at yadro.com Received: from mta-01.yadro.com ([127.0.0.1]) by localhost (mta-01.yadro.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id H2xKUuh02BWb; Tue, 9 Feb 2021 16:57:29 +0300 (MSK) Received: from T-EXCH-03.corp.yadro.com (t-exch-03.corp.yadro.com [172.17.100.103]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-SHA384 (256/256 bits)) (No client certificate requested) by mta-01.yadro.com (Postfix) with ESMTPS id A118841281; Tue, 9 Feb 2021 16:57:27 +0300 (MSK) Received: from localhost (172.17.204.212) by T-EXCH-03.corp.yadro.com (172.17.100.103) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA384_P384) id 15.1.669.32; Tue, 9 Feb 2021 16:57:27 +0300 From: Roman Bolshakov To: , Paolo Bonzini Subject: [PULL hvf 4/5] target/i386/hvf: add rdmsr 35H MSR_CORE_THREAD_COUNT Date: Tue, 9 Feb 2021 16:57:21 +0300 Message-ID: <20210209135722.4891-5-r.bolshakov@yadro.com> X-Mailer: git-send-email 2.30.0 In-Reply-To: <20210209135722.4891-1-r.bolshakov@yadro.com> References: <20210209135722.4891-1-r.bolshakov@yadro.com> MIME-Version: 1.0 X-Originating-IP: [172.17.204.212] X-ClientProxiedBy: T-EXCH-01.corp.yadro.com (172.17.10.101) To T-EXCH-03.corp.yadro.com (172.17.100.103) Received-SPF: pass client-ip=89.207.88.252; envelope-from=r.bolshakov@yadro.com; helo=mta-01.yadro.com X-Spam_score_int: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham 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: Cameron Esfahani , Roman Bolshakov , Richard Henderson , Eduardo Habkost , Vladislav Yaroshchuk Errors-To: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org Sender: "Qemu-devel" 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 --- 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 d23a5b340a..e2fe0689cc 100644 --- a/target/i386/cpu.h +++ b/target/i386/cpu.h @@ -366,6 +366,7 @@ typedef enum X86Seg { #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 = X86_CPU(cpu); CPUX86State *env = &x86_cpu->env; + CPUState *cs = env_cpu(env); uint32_t msr = ECX(env); uint64_t val = 0; @@ -745,6 +746,10 @@ void simulate_rdmsr(struct CPUState *cpu) case MSR_MTRRdefType: val = env->mtrr_deftype; break; + case MSR_CORE_THREAD_COUNT: + val = cs->nr_threads * cs->nr_cores; /* thread count, bits 15..0 */ + val |= ((uint32_t)cs->nr_cores << 16); /* core count, bits 31..16 */ + break; default: /* fprintf(stderr, "%s: unknown msr 0x%x\n", __func__, msr); */ val = 0;