From nobody Sat May 18 12:47:40 2024 Delivered-To: importer@patchew.org Authentication-Results: mx.zohomail.com; dkim=pass; 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=pass(p=reject dis=none) header.from=digitalocean.com ARC-Seal: i=1; a=rsa-sha256; t=1666971120; cv=none; d=zohomail.com; s=zohoarc; b=YxcNboLsppUngW1kRGFks4O1fQVcheyr65dMRBdNPMocesbHurxpsZR+pcJqmW1TGYHyerPphogVcPXutocmDpZfO+oFzCon2ZHm+E2c8JT1utHfo/w3NyfKO0jbyo19CQSuiOlc9YA48wBLcRondAY3WYMq1w6vICg6NFqCgaA= ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=zohomail.com; s=zohoarc; t=1666971120; h=Content-Transfer-Encoding:Cc:Date:From:List-Subscribe:List-Post:List-Id:List-Archive:List-Help:List-Unsubscribe:MIME-Version:Message-ID:Sender:Subject; bh=pQaU/3JKiw+NoZHOSedRPDD9BwoZPsc+/PL8EuuZ3Fk=; b=GTpC7NO8YtlG+UB5bIO40p2JlxJkNczi8MMSpjGgAO+YNJlUtfBSXcra2KpMUvGFicj2d/G8DVBEsn6GHfFSpkq7BJbQUZXslKdZ6KHZNFx+puA825OSRQYOBIyBnf7S2LN9WTxZLJ1SgmlK1bFAkNSNEkg9MA8sVymP2mp6Gx0= ARC-Authentication-Results: i=1; mx.zohomail.com; dkim=pass; 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=pass header.from= (p=reject dis=none) Return-Path: Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) by mx.zohomail.com with SMTPS id 1666971120536863.1110028538834; Fri, 28 Oct 2022 08:32:00 -0700 (PDT) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1ooR5I-0000aN-C4; Fri, 28 Oct 2022 11:15:48 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1ooQtY-0000x5-Gg for qemu-devel@nongnu.org; Fri, 28 Oct 2022 11:03:49 -0400 Received: from mail-io1-xd2c.google.com ([2607:f8b0:4864:20::d2c]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.90_1) (envelope-from ) id 1ooQtX-00064b-0n for qemu-devel@nongnu.org; Fri, 28 Oct 2022 11:03:40 -0400 Received: by mail-io1-xd2c.google.com with SMTP id d123so23025iof.7 for ; Fri, 28 Oct 2022 08:03:36 -0700 (PDT) Received: from xryan.internal.digitalocean.com (107-142-220-210.lightspeed.wlfrct.sbcglobal.net. [107.142.220.210]) by smtp.gmail.com with ESMTPSA id t1-20020a05620a450100b006ee7e223bb8sm3142792qkp.39.2022.10.28.08.03.23 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 28 Oct 2022 08:03:24 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=digitalocean.com; s=google; h=content-transfer-encoding:mime-version:message-id:date:subject:cc :to:from:from:to:cc:subject:date:message-id:reply-to; bh=pQaU/3JKiw+NoZHOSedRPDD9BwoZPsc+/PL8EuuZ3Fk=; b=MunfcooxnNkkEzpzV5c8fT7ZA2WzxeRlzO2eA2Qp9ZFZyjrNHAboPXxwSR/iujWv7l co63yT06dzOugG870z66II7fvHyKqRfkAtc5H/LqpN8m6buTzk2X6jvfWJ78yAXTY/rh sWwG9Y4HvQsycpCamZI9fkCfy+tF9F6mS3jKI= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=content-transfer-encoding:mime-version:message-id:date:subject:cc :to:from:x-gm-message-state:from:to:cc:subject:date:message-id :reply-to; bh=pQaU/3JKiw+NoZHOSedRPDD9BwoZPsc+/PL8EuuZ3Fk=; b=pigk/rZg2pbkTTtHm2FYRZTAXf5dOqhUFKIqqmFgU11nir6k45uyOcDcRv0yevtJ2d ZV0kjhhYt/UaDl2QCW1q8kRWCqo4N8kX7ay39+U4jkxjnv4qmHET5pRNNqSQTtzJoI2a acnMHAIWbyzHiw4eRMfTtmlxKfAdviXp9W/DxO4rrgx5UzncwbFKtlEExxYN1ZkwiwGH EawwpH4HIDkjWN3BsGoZkv6XfFvw+COhWBjZU43O3Msp/bni82qTVSZka1Y++EoxA1Y/ 4V0e+T61HXry0ZjtMdF2QHpxjciIvHh+UZN2Cvh8epvHfdQgjPD5eeJ9MdkGdca2JgIz w73Q== X-Gm-Message-State: ACrzQf3lrT9lgYWk+tawHsO6+6I97PDe3N+4JkSdgbDOX305IM6sNwHo fVfgSWd2rTX/E4klXRtwSMqTBfJ7IIFkFWVQ X-Google-Smtp-Source: AMsMyM5PkueBJAWUlMvTvlZyyMDZHyl5Rfg6Sjg0qlDDS0CL3fFSC0ozBGQ4zEHJ/DwMDZ5CO6aDdg== X-Received: by 2002:ac8:5890:0:b0:39c:d67d:1f63 with SMTP id t16-20020ac85890000000b0039cd67d1f63mr45584755qta.450.1666969404971; Fri, 28 Oct 2022 08:03:24 -0700 (PDT) From: Liang Yan X-Google-Original-From: Liang Yan To: Cc: Paolo Bonzini , Richard Henderson , Yang Zhong , Vitaly Kuznetsov , Jing Liu , qemu-devel@nongnu.org (open list:All patches CC here) Subject: [PATCH] target/i386/cpu: disable PERFCORE for AMD when cpu.pmu is off Date: Fri, 28 Oct 2022 11:02:43 -0400 Message-Id: <20221028150243.34514-1-lyan@digtalocean.com> X-Mailer: git-send-email 2.34.1 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=2607:f8b0:4864:20::d2c; envelope-from=lyan@digitalocean.com; helo=mail-io1-xd2c.google.com X-Spam_score_int: -25 X-Spam_score: -2.6 X-Spam_bar: -- X-Spam_report: (-2.6 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.516, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-Mailman-Approved-At: Fri, 28 Oct 2022 11:15:43 -0400 X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "Qemu-devel" Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org X-ZohoMail-DKIM: pass (identity @digitalocean.com) X-ZM-MESSAGEID: 1666971122462100003 Content-Type: text/plain; charset="utf-8" With cpu.pmu=3Doff, perfctr_core could still be seen in an AMD guest cpuid. By further digging, I found cpu.perfctr_core did the trick. However, considering the 'enable_pmu' in KVM could work on both Intel and AMD, we may add AMD PMU control under 'enabe_pmu' in QEMU too. This change will overide the property 'perfctr_ctr' and change the AMD PMU to off by default. Signed-off-by: Liang Yan --- target/i386/cpu.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/target/i386/cpu.c b/target/i386/cpu.c index 22b681ca37..edf5413c90 100644 --- a/target/i386/cpu.c +++ b/target/i386/cpu.c @@ -5706,6 +5706,10 @@ void cpu_x86_cpuid(CPUX86State *env, uint32_t index,= uint32_t count, *ecx |=3D 1 << 1; /* CmpLegacy bit */ } } + + if (!cpu->enable_pmu) { + *ecx &=3D ~CPUID_EXT3_PERFCORE; + } break; case 0x80000002: case 0x80000003: --=20 2.34.1