From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org 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 smtp.lore.kernel.org (Postfix) with ESMTPS id 260D2C7115B for ; Thu, 19 Jun 2025 14:52:10 +0000 (UTC) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1uSGcD-0000E6-UY; Thu, 19 Jun 2025 10:51:45 -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 1uSGcB-0000CX-LX for qemu-devel@nongnu.org; Thu, 19 Jun 2025 10:51:44 -0400 Received: from us-smtp-delivery-124.mimecast.com ([170.10.133.124]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1uSGc8-0006St-1p for qemu-devel@nongnu.org; Thu, 19 Jun 2025 10:51:43 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1750344683; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=+zmIsoSVlbXl/mIBurEggPaFohPRQI2m4B/ozK2a1C0=; b=KeXJmbsWl45objGvOon+x7BrL5GgZ5Wp00PCoZvDWqSuoTyEQB/rN1UNrOXQFAJgICkMox xcy6DlKQTwHrq//G/2vRRfvGFo6F5XsqpP4KSCb4vQXggw9rwl/3seH7kYd194UWh806Op 6Q0dgNqCvToR3+PZe/bVS4C4HbeUEX4= Received: from mx-prod-mc-06.mail-002.prod.us-west-2.aws.redhat.com (ec2-35-165-154-97.us-west-2.compute.amazonaws.com [35.165.154.97]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.3, cipher=TLS_AES_256_GCM_SHA384) id us-mta-486-7wSx3kdlNwyqq1mvCYUxAw-1; Thu, 19 Jun 2025 10:51:18 -0400 X-MC-Unique: 7wSx3kdlNwyqq1mvCYUxAw-1 X-Mimecast-MFC-AGG-ID: 7wSx3kdlNwyqq1mvCYUxAw_1750344676 Received: from mx-prod-int-04.mail-002.prod.us-west-2.aws.redhat.com (mx-prod-int-04.mail-002.prod.us-west-2.aws.redhat.com [10.30.177.40]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) by mx-prod-mc-06.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTPS id A8465180028B; Thu, 19 Jun 2025 14:51:16 +0000 (UTC) Received: from laptop.redhat.com (unknown [10.45.224.77]) by mx-prod-int-04.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTP id D251819560A3; Thu, 19 Jun 2025 14:51:12 +0000 (UTC) From: Eric Auger To: eric.auger.pro@gmail.com, eric.auger@redhat.com, qemu-devel@nongnu.org, qemu-arm@nongnu.org, miguel.luis@oracle.com, peter.maydell@linaro.org, richard.henderson@linaro.org, maz@kernel.org, gkulkarni@amperecomputing.com, gankulkarni@os.amperecomputing.com Cc: hi@alyssa.is Subject: [PATCH v6 4/5] target/arm: Enable feature ARM_FEATURE_EL2 if EL2 is supported Date: Thu, 19 Jun 2025 16:50:02 +0200 Message-ID: <20250619145047.1669471-5-eric.auger@redhat.com> In-Reply-To: <20250619145047.1669471-1-eric.auger@redhat.com> References: <20250619145047.1669471-1-eric.auger@redhat.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Scanned-By: MIMEDefang 3.0 on 10.30.177.40 Received-SPF: pass client-ip=170.10.133.124; envelope-from=eric.auger@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-Spam_score_int: -39 X-Spam_score: -4.0 X-Spam_bar: ---- X-Spam_report: (-4.0 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-1.897, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_NONE=-0.0001, RCVD_IN_MSPIKE_H5=0.001, RCVD_IN_MSPIKE_WL=0.001, RCVD_IN_VALIDITY_RPBL_BLOCKED=0.001, RCVD_IN_VALIDITY_SAFE_BLOCKED=0.001, 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: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org From: Haibo Xu KVM_CAP_ARM_EL2 must be supported by the cpu to enable ARM_FEATURE_EL2. In case the host does support NV, expose the feature. Signed-off-by: Haibo Xu Signed-off-by: Miguel Luis Signed-off-by: Eric Auger Reviewed-by: Richard Henderson --- v2 -> v3: - check pmu->has_el2 on kvm_arch_init_vcpu() when setting KVM_ARM_VCPU_HAS_EL2 feature (Peter) v1 -> v2: - remove isar_feature_aa64_aa32_el2 modif in target/arm/cpu.h [Richard] and use el2_supported in kvm_arch_init_vcpu --- target/arm/kvm.c | 16 ++++++++++++++++ 1 file changed, 16 insertions(+) diff --git a/target/arm/kvm.c b/target/arm/kvm.c index 54e50796b4..efd0ab735e 100644 --- a/target/arm/kvm.c +++ b/target/arm/kvm.c @@ -227,6 +227,7 @@ static bool kvm_arm_get_host_cpu_features(ARMHostCPUFeatures *ahcf) */ int fdarray[3]; bool sve_supported; + bool el2_supported; bool pmu_supported = false; uint64_t features = 0; int err; @@ -246,6 +247,14 @@ static bool kvm_arm_get_host_cpu_features(ARMHostCPUFeatures *ahcf) init.features[0] |= 1 << KVM_ARM_VCPU_SVE; } + /* + * Ask for EL2 if supported. + */ + el2_supported = kvm_arm_el2_supported(); + if (el2_supported) { + init.features[0] |= 1 << KVM_ARM_VCPU_HAS_EL2; + } + /* * Ask for Pointer Authentication if supported, so that we get * the unsanitized field values for AA64ISAR1_EL1. @@ -429,6 +438,10 @@ static bool kvm_arm_get_host_cpu_features(ARMHostCPUFeatures *ahcf) features |= 1ULL << ARM_FEATURE_AARCH64; features |= 1ULL << ARM_FEATURE_GENERIC_TIMER; + if (el2_supported) { + features |= 1ULL << ARM_FEATURE_EL2; + } + ahcf->features = features; return true; @@ -1894,6 +1907,9 @@ int kvm_arch_init_vcpu(CPUState *cs) cpu->kvm_init_features[0] |= (1 << KVM_ARM_VCPU_PTRAUTH_ADDRESS | 1 << KVM_ARM_VCPU_PTRAUTH_GENERIC); } + if (cpu->has_el2 && kvm_arm_el2_supported()) { + cpu->kvm_init_features[0] |= 1 << KVM_ARM_VCPU_HAS_EL2; + } /* Do KVM_ARM_VCPU_INIT ioctl */ ret = kvm_arm_vcpu_init(cpu); -- 2.49.0