From nobody Mon Feb 9 18:44:12 2026 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=unpredictable.fr ARC-Seal: i=1; a=rsa-sha256; t=1753710492; cv=none; d=zohomail.com; s=zohoarc; b=OQ0eMU/b6L8KUYgSb++O3k0sRicfK6pyXEOLJtUAcIkD9tScaZ6M5Sl+VcTxTXMo0rq1+jQ5xm6+8YhWgPnhkCqJS+GM1TUpVuHkyayg0bgWtN011rgNoCgwMdljg/jIVTLgC9+kzijPQJgyZY0aZ+Ix8eOEEXKaX7ppVuFErgs= ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=zohomail.com; s=zohoarc; t=1753710492; h=Content-Type:Content-Transfer-Encoding:Cc:Cc:Date:Date:From:From:In-Reply-To:List-Subscribe:List-Post:List-Id:List-Archive:List-Help:List-Unsubscribe:MIME-Version:Message-ID:References:Sender:Subject:Subject:To:To:Message-Id:Reply-To; bh=J1nJyl6Z22NYU2tA6mRe99LaY8X3LBgdU2vPzRuLMcE=; b=WDDTFkWUpYJd8goFWhmgspa5jCukLKJPI+tDyHihSFW+gMUYNKMNDXtTL/sTF7Eg9oMypxUUGTHN/JCVsknimeKAw1/DRtEMMin7Tv2zr7H+b4xykcuAywePf/nzFgYHqCbgVwStNCPvaYJLLtge0Dd9H5ssSjapvaDo/qy+KG0= 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 1753710492288996.0857414199138; Mon, 28 Jul 2025 06:48:12 -0700 (PDT) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1ugO7S-0000Rr-F0; Mon, 28 Jul 2025 09:42:22 -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 1ugO6r-00056I-Kf for qemu-devel@nongnu.org; Mon, 28 Jul 2025 09:41:46 -0400 Received: from p-east3-cluster6-host1-snip4-5.eps.apple.com ([57.103.85.136] helo=outbound.qs.icloud.com) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1ugO6o-0004Jh-T6 for qemu-devel@nongnu.org; Mon, 28 Jul 2025 09:41:45 -0400 Received: from outbound.qs.icloud.com (unknown [127.0.0.2]) by p00-icloudmta-asmtp-us-east-2d-100-percent-3 (Postfix) with ESMTPS id B4E96180023D; Mon, 28 Jul 2025 13:41:38 +0000 (UTC) Received: from localhost.localdomain (qs-asmtp-me-k8s.p00.prod.me.com [17.57.155.37]) by p00-icloudmta-asmtp-us-east-2d-100-percent-3 (Postfix) with ESMTPSA id 7D57118000AA; Mon, 28 Jul 2025 13:41:36 +0000 (UTC) Dkim-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=unpredictable.fr; s=sig1; bh=J1nJyl6Z22NYU2tA6mRe99LaY8X3LBgdU2vPzRuLMcE=; h=From:To:Subject:Date:Message-Id:MIME-Version:Content-Type:x-icloud-hme; b=fUEqUgB0BkpEE9H+cSyDlbPD3ZKh7vKDkoCe+OviyXxoZW4X/8D+7GosoW85XMAMz/EmAj0fJvrn8Pu/XLrm/3McL/+0hfuRXJAmjA5HRhoIfvqcKdoP6d601ukoE1C/ktWutSJ6S5w8L5K8y/y9Xtbs1XbpdtPuVld/h+lI7fOg29ZsfaQkbTpNUiJTG5W1il97vpD4WTXLiQzXTv63p0opOCQRcE4QKcVNMXc2ZDbgriJHQdQXcAQ990OTMLequs0KDvDhKdLd1kqOH/gB1/yT5Jaa+BApXH/UyAlmEp41/qHnKGKERFmDS3JK3iAR6IoNNS0OksnjrmNh1Y7nog== X-Client-IP: 46.189.47.18 From: Mohamed Mediouni To: qemu-devel@nongnu.org Cc: Mads Ynddal , Paolo Bonzini , Shannon Zhao , Phil Dennis-Jordan , Igor Mammedov , qemu-arm@nongnu.org, Alexander Graf , Roman Bolshakov , Peter Maydell , "Michael S. Tsirkin" , Ani Sinha , Cameron Esfahani , Mohamed Mediouni Subject: [PATCH v5 11/13] hvf: gate ARM_FEATURE_PMU register emulation behind not being at EL2 Date: Mon, 28 Jul 2025 15:41:12 +0200 Message-Id: <20250728134114.77545-12-mohamed@unpredictable.fr> X-Mailer: git-send-email 2.39.5 (Apple Git-154) In-Reply-To: <20250728134114.77545-1-mohamed@unpredictable.fr> References: <20250728134114.77545-1-mohamed@unpredictable.fr> MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable X-Proofpoint-Spam-Details-Enc: AW1haW4tMjUwNzI4MDEwMSBTYWx0ZWRfX4FpretWVjPQd YjgZEI8yjbJnAt6eqNpvrTy6j6P0Ob3m2rO/UFsAFoe+LTfpHmyGViNPeNSABEn1SPpjZy09Kz7 UnYldOhZ6ZFpciOdMsSfq0SjkM+R8FvUkf5quNA3GroWjC7qJNpso95xqGEQyywSXLXQI6tclHB 12rs+BC/L6zJg/GUkdCIqxres0D7WvsJM1yrw41gkyoWXWIG2ximuMMTnvumH7E1ip6nDq8688N Ty6Th8jwQR20D3hCfGXNg3bnl5JEkgVDmXTgE5i0VGusLWGTRIZ1/oncI2g0KXU9o+dj8BAOo= X-Proofpoint-GUID: vF3sOsrB9ORjJmIqU01mq9Av2tXvxBn3 X-Proofpoint-ORIG-GUID: vF3sOsrB9ORjJmIqU01mq9Av2tXvxBn3 X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1099,Hydra:6.1.9,FMLib:17.12.80.40 definitions=2025-07-28_03,2025-07-28_01,2025-03-28_01 X-Proofpoint-Spam-Details: rule=notspam policy=default score=0 adultscore=0 phishscore=0 suspectscore=0 malwarescore=0 spamscore=0 mlxlogscore=766 bulkscore=0 mlxscore=0 clxscore=1030 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.22.0-2506270000 definitions=main-2507280101 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=57.103.85.136; envelope-from=mohamed@unpredictable.fr; helo=outbound.qs.icloud.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, RCVD_IN_VALIDITY_CERTIFIED_BLOCKED=0.001, RCVD_IN_VALIDITY_RPBL_BLOCKED=0.001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=unavailable autolearn_force=no X-Spam_action: no action 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: , Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: qemu-devel-bounces+importer=patchew.org@nongnu.org X-ZohoMail-DKIM: pass (identity @unpredictable.fr) X-ZM-MESSAGEID: 1753710493933116600 From Apple documentation: > When EL2 is disabled, PMU register accesses trigger "Trapped MSR, MRS, or > System Instruction" exceptions. When this happens, hv_vcpu_run()=E2=80=AF= returns, and the > =E2=80=AFhv_vcpu_exit_t=E2=80=AFobject contains the information about thi= s exception. > When EL2 is enabled, the handling of PMU register accesses is determined = by the PMUVer > field of ID_AA64DFR0_EL1=E2=80=AFregister. > If the PMUVer=E2=80=AFfield value is zero or is invalid, PMU register acc= esses generate "Undefined" > exceptions, which are sent to the guest. > If the PMUVer=E2=80=AFfield value is non-zero and valid, PMU register acc= esses are emulated by the framework. > The ID_AA64DFR0_EL1=E2=80=AFregister can be modified via hv_vcpu_set_sys_= reg=E2=80=AFAPI. Signed-off-by: Mohamed Mediouni Reviewed-by: Philippe Mathieu-Daud=C3=A9 Tested-by: Philippe Mathieu-Daud=C3=A9 --- target/arm/hvf/hvf.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/target/arm/hvf/hvf.c b/target/arm/hvf/hvf.c index a1e928ddfa..f70870fb62 100644 --- a/target/arm/hvf/hvf.c +++ b/target/arm/hvf/hvf.c @@ -1379,7 +1379,7 @@ static int hvf_sysreg_read(CPUState *cpu, uint32_t re= g, uint64_t *val) ARMCPU *arm_cpu =3D ARM_CPU(cpu); CPUARMState *env =3D &arm_cpu->env; =20 - if (arm_feature(env, ARM_FEATURE_PMU)) { + if (!hvf_arm_el2_enabled() && arm_feature(env, ARM_FEATURE_PMU)) { switch (reg) { case SYSREG_PMCR_EL0: *val =3D env->cp15.c9_pmcr; @@ -1676,7 +1676,7 @@ static int hvf_sysreg_write(CPUState *cpu, uint32_t r= eg, uint64_t val) SYSREG_OP2(reg), val); =20 - if (arm_feature(env, ARM_FEATURE_PMU)) { + if (!hvf_arm_el2_enabled() && arm_feature(env, ARM_FEATURE_PMU)) { switch (reg) { case SYSREG_PMCCNTR_EL0: pmu_op_start(env); --=20 2.39.5 (Apple Git-154)