From nobody Sun Nov 9 17:52:11 2025 Delivered-To: importer@patchew.org Received-SPF: pass (zoho.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; Authentication-Results: mx.zohomail.com; spf=pass (zoho.com: domain of gnu.org designates 209.51.188.17 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 [209.51.188.17]) by mx.zohomail.com with SMTPS id 1551189205697534.86776913193; Tue, 26 Feb 2019 05:53:25 -0800 (PST) Received: from localhost ([127.0.0.1]:55630 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1gydAh-0001YN-GC for importer@patchew.org; Tue, 26 Feb 2019 08:53:23 -0500 Received: from eggs.gnu.org ([209.51.188.92]:47490) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1gyd8W-0000Bv-8E for qemu-devel@nongnu.org; Tue, 26 Feb 2019 08:51:10 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1gyd8V-00074v-6z for qemu-devel@nongnu.org; Tue, 26 Feb 2019 08:51:08 -0500 Received: from mx1.redhat.com ([209.132.183.28]:34180) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1gyd8S-00070B-Jb; Tue, 26 Feb 2019 08:51:04 -0500 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 C9A283169B2D; Tue, 26 Feb 2019 13:51:03 +0000 (UTC) Received: from laptop.redhat.com (ovpn-116-102.ams2.redhat.com [10.36.116.102]) by smtp.corp.redhat.com (Postfix) with ESMTP id 1BABD5F9A0; Tue, 26 Feb 2019 13:50:59 +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, imammedo@redhat.com, david@redhat.com Date: Tue, 26 Feb 2019 14:50:04 +0100 Message-Id: <20190226135014.31854-9-eric.auger@redhat.com> In-Reply-To: <20190226135014.31854-1-eric.auger@redhat.com> References: <20190226135014.31854-1-eric.auger@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 [10.5.110.41]); Tue, 26 Feb 2019 13:51:03 +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 v8 08/18] hw/arm/virt: Implement kvm_type function for 4.0 machine 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: pbonzini@redhat.com, drjones@redhat.com, dgilbert@redhat.com, david@gibson.dropbear.id.au Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" Content-Type: text/plain; charset="utf-8" This patch implements the machine class kvm_type() callback. It returns the number of bits requested to implement the whole GPA range including the RAM and IO regions located beyond. The returned value in passed though the KVM_CREATE_VM ioctl and this allows KVM to set the stage2 tables dynamically. To compute the highest GPA used in the memory map, kvm_type() must freeze the memory map by calling virt_set_memmap(). Signed-off-by: Eric Auger --- v7 -> v8: - remove vmc->no_extended_memmap and vms->extended_memmap v6 -> v7: - Introduce RAMBASE and rename add LEGACY_ prefix in that patch - use local variables with explicit names in virt_set_memmap: device_memory_base, device_memory_size - add an extended_memmap field in the class v5 -> v6: - add some comments - high IO region cannot start before 256GiB --- hw/arm/virt.c | 39 ++++++++++++++++++++++++++++++++++++++- 1 file changed, 38 insertions(+), 1 deletion(-) diff --git a/hw/arm/virt.c b/hw/arm/virt.c index 172bb6c140..3981916931 100644 --- a/hw/arm/virt.c +++ b/hw/arm/virt.c @@ -1828,6 +1828,36 @@ static HotplugHandler *virt_machine_get_hotplug_hand= ler(MachineState *machine, return NULL; } =20 +/* + * for arm64 kvm_type [7-0] encodes the requested number of bits + * in the IPA address space + */ +static int virt_kvm_type(MachineState *ms, const char *type_str) +{ + VirtMachineState *vms =3D VIRT_MACHINE(ms); + int max_vm_pa_size =3D kvm_arm_get_max_vm_ipa_size(ms); + int requested_pa_size; + + /* we freeze the memory map to compute the highest gpa */ + virt_set_memmap(vms); + + requested_pa_size =3D 64 - clz64(vms->highest_gpa); + + if (requested_pa_size > max_vm_pa_size) { + error_report("-m and ,maxmem option values " + "require an IPA range (%d bits) larger than " + "the one supported by the host (%d bits)", + requested_pa_size, max_vm_pa_size); + exit(1); + } + /* + * By default we return 0 which corresponds to an implicit legacy + * 40b IPA setting. Otherwise we return the actual requested PA + * logsize + */ + return requested_pa_size > 40 ? requested_pa_size : 0; +} + static void virt_machine_class_init(ObjectClass *oc, void *data) { MachineClass *mc =3D MACHINE_CLASS(oc); @@ -1852,6 +1882,7 @@ static void virt_machine_class_init(ObjectClass *oc, = void *data) mc->cpu_index_to_instance_props =3D virt_cpu_index_to_props; mc->default_cpu_type =3D ARM_CPU_TYPE_NAME("cortex-a15"); mc->get_default_cpu_node_id =3D virt_get_default_cpu_node_id; + mc->kvm_type =3D virt_kvm_type; assert(!mc->get_hotplug_handler); mc->get_hotplug_handler =3D virt_machine_get_hotplug_handler; hc->plug =3D virt_machine_device_plug_cb; @@ -1923,7 +1954,13 @@ static void virt_instance_init(Object *obj) "Valid values are none and smmuv3", NULL); =20 - virt_set_memmap(vms); + /* + * In accelerated mode, the memory map is computed in kvm_type() + * to create a VM with the right number of IPA bits. + */ + if (!kvm_enabled()) { + virt_set_memmap(vms); + } =20 vms->irqmap =3D a15irqmap; } --=20 2.20.1