From nobody Tue Nov 4 18:42:08 2025 Delivered-To: importer@patchew.org Received-SPF: pass (zoho.com: domain of gnu.org designates 208.118.235.17 as permitted sender) client-ip=208.118.235.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Authentication-Results: mx.zohomail.com; spf=pass (zoho.com: domain of gnu.org designates 208.118.235.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org; dmarc=fail(p=none dis=none) header.from=redhat.com Return-Path: Received: from lists.gnu.org (lists.gnu.org [208.118.235.17]) by mx.zohomail.com with SMTPS id 1539873524341267.5877460236736; Thu, 18 Oct 2018 07:38:44 -0700 (PDT) Received: from localhost ([::1]:42717 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1gD9Rj-0003MQ-9p for importer@patchew.org; Thu, 18 Oct 2018 10:38:43 -0400 Received: from eggs.gnu.org ([2001:4830:134:3::10]:36236) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1gD9L0-0005w8-7o for qemu-devel@nongnu.org; Thu, 18 Oct 2018 10:31:47 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1gD9Kz-0007NI-Ah for qemu-devel@nongnu.org; Thu, 18 Oct 2018 10:31:46 -0400 Received: from mx1.redhat.com ([209.132.183.28]:54376) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1gD9Ks-0006lF-KE; Thu, 18 Oct 2018 10:31:38 -0400 Received: from smtp.corp.redhat.com (int-mx01.intmail.prod.int.phx2.redhat.com [10.5.11.11]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id C4A1230A0210; Thu, 18 Oct 2018 14:31:24 +0000 (UTC) Received: from laptop.redhat.com (ovpn-116-215.ams2.redhat.com [10.36.116.215]) by smtp.corp.redhat.com (Postfix) with ESMTP id 9D423789A3; Thu, 18 Oct 2018 14:31:13 +0000 (UTC) From: Eric Auger To: eric.auger.pro@gmail.com, eric.auger@redhat.com, qemu-devel@nongnu.org, qemu-arm@nongnu.org, peter.maydell@linaro.org, shameerali.kolothum.thodi@huawei.com, kwangwoo.lee@sk.com, imammedo@redhat.com, david@redhat.com Date: Thu, 18 Oct 2018 16:30:30 +0200 Message-Id: <20181018143042.29588-5-eric.auger@redhat.com> In-Reply-To: <20181018143042.29588-1-eric.auger@redhat.com> References: <20181018143042.29588-1-eric.auger@redhat.com> X-Scanned-By: MIMEDefang 2.79 on 10.5.11.11 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.43]); Thu, 18 Oct 2018 14:31:24 +0000 (UTC) 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] [RFC v4 04/16] kvm: add kvm_arm_get_max_vm_phys_shift X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: drjones@redhat.com, dgilbert@redhat.com, Suzuki.Poulose@arm.com Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" X-ZohoMail: RDMRC_1 RSF_0 Z_629925259 SPT_0 Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Add the kvm_arm_get_max_vm_phys_shift() helper that returns the log of the maximum IPA size supported by KVM. This capability needs to be known to create the VM with a specific IPA max size (kvm_type passed along KVM_CREATE_VM ioctl. Signed-off-by: Eric Auger --- v3 -> v4: - s/s/ms in kvm_arm_get_max_vm_phys_shift function comment - check KVM_CAP_ARM_VM_IPA_SIZE extension v1 -> v2: - put this in ARM specific code --- target/arm/kvm.c | 8 ++++++++ target/arm/kvm_arm.h | 16 ++++++++++++++++ 2 files changed, 24 insertions(+) diff --git a/target/arm/kvm.c b/target/arm/kvm.c index 54ef5f711b..485e3291ae 100644 --- a/target/arm/kvm.c +++ b/target/arm/kvm.c @@ -18,6 +18,7 @@ #include "qemu/error-report.h" #include "sysemu/sysemu.h" #include "sysemu/kvm.h" +#include "sysemu/kvm_int.h" #include "kvm_arm.h" #include "cpu.h" #include "trace.h" @@ -154,6 +155,13 @@ void kvm_arm_set_cpu_features_from_host(ARMCPU *cpu) env->features =3D arm_host_cpu_features.features; } =20 +int kvm_arm_get_max_vm_phys_shift(MachineState *ms) +{ + KVMState *s =3D KVM_STATE(ms->accelerator); + + return kvm_check_extension(s, KVM_CAP_ARM_VM_IPA_SIZE); +} + int kvm_arch_init(MachineState *ms, KVMState *s) { /* For ARM interrupt delivery is always asynchronous, diff --git a/target/arm/kvm_arm.h b/target/arm/kvm_arm.h index 5948e8b560..749c38cb35 100644 --- a/target/arm/kvm_arm.h +++ b/target/arm/kvm_arm.h @@ -182,6 +182,17 @@ bool kvm_arm_get_host_cpu_features(ARMHostCPUFeatures = *ahcf); */ void kvm_arm_set_cpu_features_from_host(ARMCPU *cpu); =20 +/** + * kvm_arm_get_max_vm_phys_shift - Returns log2 of the max IPA size + * supported by KVM + * + * @ms: Machine state handle + * + * Return the max number of IPA bits or a negative value if + * the host kernel does not expose this value. + */ +int kvm_arm_get_max_vm_phys_shift(MachineState *ms); + /** * kvm_arm_sync_mpstate_to_kvm * @cpu: ARMCPU @@ -214,6 +225,11 @@ static inline void kvm_arm_set_cpu_features_from_host(= ARMCPU *cpu) cpu->host_cpu_probe_failed =3D true; } =20 +static inline int kvm_arm_get_max_vm_phys_shift(MachineState *ms) +{ + return -ENOENT; +} + static inline int kvm_arm_vgic_probe(void) { return 0; --=20 2.17.1