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 X-Spam-Level: X-Spam-Status: No, score=-6.8 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 661A8C32753 for ; Fri, 2 Aug 2019 12:27:04 +0000 (UTC) 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 mail.kernel.org (Postfix) with ESMTPS id 3F1FB216C8 for ; Fri, 2 Aug 2019 12:27:04 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 3F1FB216C8 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=redhat.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Received: from localhost ([::1]:34364 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.86_2) (envelope-from ) id 1htWeF-0006Lu-Fw for qemu-devel@archiver.kernel.org; Fri, 02 Aug 2019 08:27:03 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:37566) by lists.gnu.org with esmtp (Exim 4.86_2) (envelope-from ) id 1htWdB-0004K8-Ct for qemu-devel@nongnu.org; Fri, 02 Aug 2019 08:25:58 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1htWdA-0001fU-9F for qemu-devel@nongnu.org; Fri, 02 Aug 2019 08:25:57 -0400 Received: from mx1.redhat.com ([209.132.183.28]:50806) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1htWd7-0001e3-VL; Fri, 02 Aug 2019 08:25:54 -0400 Received: from smtp.corp.redhat.com (int-mx06.intmail.prod.int.phx2.redhat.com [10.5.11.16]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id 466073087958; Fri, 2 Aug 2019 12:25:53 +0000 (UTC) Received: from kamzik.brq.redhat.com (unknown [10.43.2.160]) by smtp.corp.redhat.com (Postfix) with ESMTP id 331885C205; Fri, 2 Aug 2019 12:25:51 +0000 (UTC) From: Andrew Jones To: qemu-devel@nongnu.org, qemu-arm@nongnu.org Date: Fri, 2 Aug 2019 14:25:26 +0200 Message-Id: <20190802122540.26385-2-drjones@redhat.com> In-Reply-To: <20190802122540.26385-1-drjones@redhat.com> References: <20190802122540.26385-1-drjones@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.79 on 10.5.11.16 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.45]); Fri, 02 Aug 2019 12:25:53 +0000 (UTC) Content-Transfer-Encoding: quoted-printable X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] X-Received-From: 209.132.183.28 Subject: [Qemu-devel] [PATCH v3 01/15] target/arm/cpu64: Ensure kvm really supports aarch64=off 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: peter.maydell@linaro.org, richard.henderson@linaro.org, armbru@redhat.com, eric.auger@redhat.com, imammedo@redhat.com, alex.bennee@linaro.org, Dave.Martin@arm.com Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" If -cpu ,aarch64=3Doff is used then KVM must also be used, and it and the host must support running the vcpu in 32-bit mode. Also, if -cpu ,aarch64=3Don is used, then it doesn't matter if kvm is enabled or not. Signed-off-by: Andrew Jones Reviewed-by: Eric Auger --- target/arm/cpu64.c | 12 ++++++------ target/arm/kvm64.c | 9 +++++++++ target/arm/kvm_arm.h | 14 ++++++++++++++ 3 files changed, 29 insertions(+), 6 deletions(-) diff --git a/target/arm/cpu64.c b/target/arm/cpu64.c index 1901997a0645..946994838d8a 100644 --- a/target/arm/cpu64.c +++ b/target/arm/cpu64.c @@ -407,13 +407,13 @@ static void aarch64_cpu_set_aarch64(Object *obj, bo= ol value, Error **errp) * restriction allows us to avoid fixing up functionality that assum= es a * uniform execution state like do_interrupt. */ - if (!kvm_enabled()) { - error_setg(errp, "'aarch64' feature cannot be disabled " - "unless KVM is enabled"); - return; - } - if (value =3D=3D false) { + if (!kvm_enabled() || !kvm_arm_aarch32_supported(CPU(cpu))) { + error_setg(errp, "'aarch64' feature cannot be disabled " + "unless KVM is enabled and 32-bit EL1 " + "is supported"); + return; + } unset_feature(&cpu->env, ARM_FEATURE_AARCH64); } else { set_feature(&cpu->env, ARM_FEATURE_AARCH64); diff --git a/target/arm/kvm64.c b/target/arm/kvm64.c index 22d19c9aec6f..3d91846beb8f 100644 --- a/target/arm/kvm64.c +++ b/target/arm/kvm64.c @@ -24,7 +24,9 @@ #include "exec/gdbstub.h" #include "sysemu/sysemu.h" #include "sysemu/kvm.h" +#include "sysemu/kvm_int.h" #include "kvm_arm.h" +#include "hw/boards.h" #include "internals.h" =20 static bool have_guest_debug; @@ -593,6 +595,13 @@ bool kvm_arm_get_host_cpu_features(ARMHostCPUFeature= s *ahcf) return true; } =20 +bool kvm_arm_aarch32_supported(CPUState *cpu) +{ + KVMState *s =3D KVM_STATE(current_machine->accelerator); + + return kvm_check_extension(s, KVM_CAP_ARM_EL1_32BIT); +} + #define ARM_CPU_ID_MPIDR 3, 0, 0, 0, 5 =20 int kvm_arch_init_vcpu(CPUState *cs) diff --git a/target/arm/kvm_arm.h b/target/arm/kvm_arm.h index 2a07333c615f..98af1050a753 100644 --- a/target/arm/kvm_arm.h +++ b/target/arm/kvm_arm.h @@ -207,6 +207,15 @@ bool kvm_arm_get_host_cpu_features(ARMHostCPUFeature= s *ahcf); */ void kvm_arm_set_cpu_features_from_host(ARMCPU *cpu); =20 +/** + * kvm_arm_aarch32_supported: + * @cs: CPUState + * + * Returns: true if the KVM VCPU can enable AArch32 mode + * and false otherwise. + */ +bool kvm_arm_aarch32_supported(CPUState *cs); + /** * kvm_arm_get_max_vm_ipa_size - Returns the number of bits in the * IPA address space supported by KVM @@ -247,6 +256,11 @@ static inline void kvm_arm_set_cpu_features_from_hos= t(ARMCPU *cpu) cpu->host_cpu_probe_failed =3D true; } =20 +static inline bool kvm_arm_aarch32_supported(CPUState *cs) +{ + return false; +} + static inline int kvm_arm_get_max_vm_ipa_size(MachineState *ms) { return -ENOENT; --=20 2.20.1