From nobody Sat Nov 15 09:10:31 2025 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=1754322763; cv=none; d=zohomail.com; s=zohoarc; b=l9wqnKgVOVhjz6dGcDWcZM308uFq7fD80dXrwFOF7sAaRV++/fzV9RPTtZ1Dj6/oxCN+OtELjFrVktBveTW3BkvyO3dzBVfi/XXe2G7o2cTCZqgiNDCRiWinHfxmaz1UYUaf+RvS9tPsZ1nxgC6Gsp21F13o1DaYiihRKLxPoNk= ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=zohomail.com; s=zohoarc; t=1754322763; h=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=PgdMsH5bQwRo3IUiZKbnzV3RrP/jKfr+nWtotr/IL+4=; b=j3eIx3DmTIbJeiYhYL9w6Sm17RPgYKBRu8KZrKNmWwJjZXlw74Lju79ieiSXbq7CTjrjMsrHAJpEqqmAYpagLxh6HRWgd7vrdupa3Xn38DZWiRfZJ8nqtTMZP3Q5Uxv/uZdAVB2iAKQyNjqDZavaU2eOQ3ADuTWq7Rn4R/9gZ7s= 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 1754322763567400.7475569011368; Mon, 4 Aug 2025 08:52:43 -0700 (PDT) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1uixUA-0002hR-N3; Mon, 04 Aug 2025 11:52:32 -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 1uiw76-0005sZ-MM for qemu-devel@nongnu.org; Mon, 04 Aug 2025 10:24:33 -0400 Received: from p-east3-cluster4-host4-snip4-4.eps.apple.com ([57.103.84.37] 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 1uiw6t-0000Sd-7m for qemu-devel@nongnu.org; Mon, 04 Aug 2025 10:24:26 -0400 Received: from outbound.qs.icloud.com (unknown [127.0.0.2]) by p00-icloudmta-asmtp-us-east-2d-10-percent-0 (Postfix) with ESMTPS id DA07C18001E9; Mon, 4 Aug 2025 14:24:06 +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-10-percent-0 (Postfix) with ESMTPSA id C63141800149; Mon, 4 Aug 2025 14:24:03 +0000 (UTC) Dkim-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=unpredictable.fr; s=sig1; bh=PgdMsH5bQwRo3IUiZKbnzV3RrP/jKfr+nWtotr/IL+4=; h=From:To:Subject:Date:Message-Id:MIME-Version:x-icloud-hme; b=C7CMEI4P/lzidmu5MmHxDPiRo933y5L7vKwP4+DGacTVm2fL26hWZMKlblCl9WO6u8nwbj8KIrKraZW/Suu+/0ABu+cqqYSCd0lgrJZTXtV1A+j4SxNtvu7TSos+YB8i72MR49KT9kRyaSCLhIlD4Ol2jYttXvzXDEeiJFTCBOn/2gFIdHp3Qjlpx3DJvcGWGcyE8vQkWhNKg8TSeZaE9FnDPXn/0MFO8dwXK54iw8ygbngG6oGQWBvFhV7ppvXMlQXBbxElUIl2qiXLRk/P0LEILwHg+Qi9ggFE17gq8jkrcA7yWGZT+gDOW6DWiFNrHfCKEdKjxuY3q5rPLpBWNg== X-Client-IP: 46.189.47.18 From: Mohamed Mediouni To: qemu-devel@nongnu.org Cc: Shannon Zhao , Ani Sinha , =?UTF-8?q?Philippe=20Mathieu-Daud=C3=A9?= , Phil Dennis-Jordan , Roman Bolshakov , Igor Mammedov , Eduardo Habkost , Mohamed Mediouni , Mads Ynddal , =?UTF-8?q?Daniel=20P=2E=20Berrang=C3=A9?= , Sunil Muthuswamy , Zhao Liu , "Michael S. Tsirkin" , Alexander Graf , qemu-arm@nongnu.org, Peter Maydell , Marcel Apfelbaum , Yanan Wang , Richard Henderson , Cameron Esfahani , Paolo Bonzini , =?UTF-8?q?Marc-Andr=C3=A9=20Lureau?= Subject: [PATCH v4 13/17] whpx: arm64: clamp down IPA size Date: Mon, 4 Aug 2025 16:23:22 +0200 Message-Id: <20250804142326.72947-14-mohamed@unpredictable.fr> X-Mailer: git-send-email 2.39.5 (Apple Git-154) In-Reply-To: <20250804142326.72947-1-mohamed@unpredictable.fr> References: <20250804142326.72947-1-mohamed@unpredictable.fr> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-Proofpoint-Spam-Details-Enc: AW1haW4tMjUwODA0MDA4MCBTYWx0ZWRfX5Oei8xqdDM9h eJn3XxUmCtG5+3cOsLcTlH85/113H5bCyBikHPfh4Bt4EhIwp8d5+9tWYb82Wc5Z39Tk7e3C1uf 2KlUwU4QsMOvJaT3J5Oy8wV76cWmU9wAaaHS6lsWKHX7s+P5Ysnu5mYeygNt/e37MzTjjMjx6WJ rsDBjO/lh4OPihLqMEFKd0nhoxAMZb6E9dub/6pp6KCCP2CM4CTMrwVXwzAgGUwHPjZvLvmqdUn FH85G7XkS+8LvMMg2nZYLFKAvjMiVqqgXagg/P0rqWAMTdH9oyDh5TSGbtrDkvGMd0DJVGxIE= X-Proofpoint-GUID: 4uugS4FmB9nR6e15Xh30nH607VOtvQHI X-Proofpoint-ORIG-GUID: 4uugS4FmB9nR6e15Xh30nH607VOtvQHI 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=2025-08-04_06,2025-08-04_01,2025-03-28_01 X-Proofpoint-Spam-Details: rule=notspam policy=default score=0 bulkscore=0 spamscore=0 mlxlogscore=999 malwarescore=0 suspectscore=0 adultscore=0 phishscore=0 mlxscore=0 clxscore=1030 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.22.0-2506270000 definitions=main-2508040080 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=57.103.84.37; 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_RPBL_BLOCKED=0.001, RCVD_IN_VALIDITY_SAFE_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: 1754322765700116600 Content-Type: text/plain; charset="utf-8" Code taken from HVF and adapted for WHPX use. Note that WHPX doesn't have a default vs maximum IPA distinction. Signed-off-by: Mohamed Mediouni --- hw/arm/virt.c | 32 ++++++++++++++++++++++++++ include/hw/boards.h | 1 + target/arm/whpx/meson.build | 2 ++ target/arm/whpx/whpx-all.c | 45 +++++++++++++++++++++++++++++++++++++ target/arm/whpx/whpx-stub.c | 15 +++++++++++++ target/arm/whpx_arm.h | 16 +++++++++++++ 6 files changed, 111 insertions(+) create mode 100644 target/arm/whpx/whpx-stub.c create mode 100644 target/arm/whpx_arm.h diff --git a/hw/arm/virt.c b/hw/arm/virt.c index 0039f6a12b..f90c3fc113 100644 --- a/hw/arm/virt.c +++ b/hw/arm/virt.c @@ -70,6 +70,7 @@ #include "hw/irq.h" #include "kvm_arm.h" #include "hvf_arm.h" +#include "whpx_arm.h" #include "hw/firmware/smbios.h" #include "qapi/visitor.h" #include "qapi/qapi-visit-common.h" @@ -3162,6 +3163,36 @@ static int virt_kvm_type(MachineState *ms, const cha= r *type_str) return fixed_ipa ? 0 : requested_pa_size; } =20 +static int virt_whpx_get_physical_address_range(MachineState *ms) +{ + VirtMachineState *vms =3D VIRT_MACHINE(ms); + + int max_ipa_size =3D whpx_arm_get_ipa_bit_size(); + + /* We freeze the memory map to compute the highest gpa */ + virt_set_memmap(vms, max_ipa_size); + + int requested_ipa_size =3D 64 - clz64(vms->highest_gpa); + + /* + * If we're <=3D the default IPA size just use the default. + * If we're above the default but below the maximum, round up to + * the maximum. hvf_arm_get_max_ipa_bit_size() conveniently only + * returns values that are valid ARM PARange values. + */ + if (requested_ipa_size <=3D max_ipa_size) { + requested_ipa_size =3D max_ipa_size; + } else { + error_report("-m and ,maxmem option values " + "require an IPA range (%d bits) larger than " + "the one supported by the host (%d bits)", + requested_ipa_size, max_ipa_size); + return -1; + } + + return requested_ipa_size; +} + static int virt_hvf_get_physical_address_range(MachineState *ms) { VirtMachineState *vms =3D VIRT_MACHINE(ms); @@ -3256,6 +3287,7 @@ static void virt_machine_class_init(ObjectClass *oc, = const void *data) mc->get_default_cpu_node_id =3D virt_get_default_cpu_node_id; mc->kvm_type =3D virt_kvm_type; mc->hvf_get_physical_address_range =3D virt_hvf_get_physical_address_r= ange; + mc->whpx_get_physical_address_range =3D virt_whpx_get_physical_address= _range; assert(!mc->get_hotplug_handler); mc->get_hotplug_handler =3D virt_machine_get_hotplug_handler; hc->pre_plug =3D virt_machine_device_pre_plug_cb; diff --git a/include/hw/boards.h b/include/hw/boards.h index f94713e6e2..dde8013bd7 100644 --- a/include/hw/boards.h +++ b/include/hw/boards.h @@ -276,6 +276,7 @@ struct MachineClass { void (*wakeup)(MachineState *state); int (*kvm_type)(MachineState *machine, const char *arg); int (*hvf_get_physical_address_range)(MachineState *machine); + int (*whpx_get_physical_address_range)(MachineState *machine); =20 BlockInterfaceType block_default_type; int units_per_default_bus; diff --git a/target/arm/whpx/meson.build b/target/arm/whpx/meson.build index 1de2ef0283..3df632c9d3 100644 --- a/target/arm/whpx/meson.build +++ b/target/arm/whpx/meson.build @@ -1,3 +1,5 @@ arm_system_ss.add(when: 'CONFIG_WHPX', if_true: files( 'whpx-all.c', )) + +arm_common_system_ss.add(when: 'CONFIG_WHPX', if_false: files('whpx-stub.c= ')) diff --git a/target/arm/whpx/whpx-all.c b/target/arm/whpx/whpx-all.c index 2e32debf6f..ed447bf014 100644 --- a/target/arm/whpx/whpx-all.c +++ b/target/arm/whpx/whpx-all.c @@ -35,6 +35,7 @@ #include "system/whpx-accel-ops.h" #include "system/whpx-all.h" #include "system/whpx-common.h" +#include "whpx_arm.h" #include "hw/arm/bsa.h" #include "arm-powerctl.h" =20 @@ -655,6 +656,40 @@ static void whpx_cpu_update_state(void *opaque, bool r= unning, RunState state) { } =20 +uint32_t whpx_arm_get_ipa_bit_size(void) +{ + WHV_CAPABILITY whpx_cap; + UINT32 whpx_cap_size; + HRESULT hr; + hr =3D whp_dispatch.WHvGetCapability( + WHvCapabilityCodePhysicalAddressWidth, &whpx_cap, + sizeof(whpx_cap), &whpx_cap_size); + if (FAILED(hr)) { + error_report("WHPX: failed to get supported" + "physical address width, hr=3D%08lx", hr); + } + + /* + * We clamp any IPA size we want to back the VM with to a valid PARange + * value so the guest doesn't try and map memory outside of the valid = range. + * This logic just clamps the passed in IPA bit size to the first valid + * PARange value <=3D to it. + */ + return round_down_to_parange_bit_size(whpx_cap.PhysicalAddressWidth); +} + +static void clamp_id_aa64mmfr0_parange_to_ipa_size(ARMISARegisters *isar) +{ + uint32_t ipa_size =3D whpx_arm_get_ipa_bit_size(); + uint64_t id_aa64mmfr0; + + /* Clamp down the PARange to the IPA size the kernel supports. */ + uint8_t index =3D round_down_to_parange_index(ipa_size); + id_aa64mmfr0 =3D GET_IDREG(isar, ID_AA64MMFR0); + id_aa64mmfr0 =3D (id_aa64mmfr0 & ~R_ID_AA64MMFR0_PARANGE_MASK) | index; + SET_IDREG(isar, ID_AA64MMFR0, id_aa64mmfr0); +} + int whpx_init_vcpu(CPUState *cpu) { HRESULT hr; @@ -735,6 +770,7 @@ int whpx_init_vcpu(CPUState *cpu) whpx_set_reg(cpu, WHvArm64RegisterMpidrEl1, val); =20 + clamp_id_aa64mmfr0_parange_to_ipa_size(&arm_cpu->isar); return 0; =20 error: @@ -757,6 +793,8 @@ int whpx_accel_init(AccelState *as, MachineState *ms) UINT32 whpx_cap_size; WHV_PARTITION_PROPERTY prop; WHV_CAPABILITY_FEATURES features =3D {0}; + MachineClass *mc =3D MACHINE_GET_CLASS(ms); + int pa_range =3D 0; =20 whpx =3D &whpx_global; /* on arm64 Windows Hypervisor Platform, vGICv3 always used */ @@ -767,6 +805,13 @@ int whpx_accel_init(AccelState *as, MachineState *ms) goto error; } =20 + if (mc->whpx_get_physical_address_range) { + pa_range =3D mc->whpx_get_physical_address_range(ms); + if (pa_range < 0) { + return -EINVAL; + } + } + whpx->mem_quota =3D ms->ram_size; =20 hr =3D whp_dispatch.WHvGetCapability( diff --git a/target/arm/whpx/whpx-stub.c b/target/arm/whpx/whpx-stub.c new file mode 100644 index 0000000000..32e434a5f6 --- /dev/null +++ b/target/arm/whpx/whpx-stub.c @@ -0,0 +1,15 @@ +/* SPDX-License-Identifier: GPL-2.0-or-later */ +/* + * WHPX stubs for ARM + * + * Copyright (c) 2025 Mohamed Mediouni + * + */ + +#include "qemu/osdep.h" +#include "whpx_arm.h" + +uint32_t whpx_arm_get_ipa_bit_size(void) +{ + g_assert_not_reached(); +} diff --git a/target/arm/whpx_arm.h b/target/arm/whpx_arm.h new file mode 100644 index 0000000000..de7406b66f --- /dev/null +++ b/target/arm/whpx_arm.h @@ -0,0 +1,16 @@ +/* SPDX-License-Identifier: GPL-2.0-or-later */ +/* + * WHPX support -- ARM specifics + * + * Copyright (c) 2025 Mohamed Mediouni + * + */ + +#ifndef QEMU_WHPX_ARM_H +#define QEMU_WHPX_ARM_H + +#include "target/arm/cpu-qom.h" + +uint32_t whpx_arm_get_ipa_bit_size(void); + +#endif --=20 2.39.5 (Apple Git-154)