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bh=DPrDVIdiESOiMapBfh0CtAjDydyyKmrnXSgaW0nkP/k=; b=XdfWLztLoIlXiWBo+XX68xNrcsXREPrsWFbIfy7q0q4IlHBxYGk/0VDXABbRhxcDGVv/rY JtN+7YOctqfC1X3WUkIaGzMPnF1u1ygPA22/tzcP3gy9Ax0tHmcmdrJlZuLooedDU45+29 3fgkDiDH4vh5bAeHUnkiFrP7NnMTOz4= X-MC-Unique: 0OlgeajHOEa3Qb3qMnwsiw-1 From: Eric Auger To: eric.auger.pro@gmail.com, eric.auger@redhat.com, qemu-devel@nongnu.org, qemu-arm@nongnu.org, jean-philippe@linaro.org, mst@redhat.com, peter.maydell@linaro.org, clg@redhat.com, zhenzhong.duan@intel.com, yanghliu@redhat.com Cc: alex.williamson@redhat.com, jasowang@redhat.com Subject: [PATCH v3 3/3] hw: Set virtio-iommu aw-bits default value on pc_q35 and arm virt Date: Thu, 8 Feb 2024 11:10:19 +0100 Message-ID: <20240208101128.655167-4-eric.auger@redhat.com> In-Reply-To: <20240208101128.655167-1-eric.auger@redhat.com> References: <20240208101128.655167-1-eric.auger@redhat.com> MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable X-Scanned-By: MIMEDefang 3.4.1 on 10.11.54.8 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=170.10.129.124; envelope-from=eric.auger@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-Spam_score_int: -21 X-Spam_score: -2.2 X-Spam_bar: -- X-Spam_report: (-2.2 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.106, 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_H2=-0.001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001, T_SCC_BODY_TEXT_LINE=-0.01 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+importer=patchew.org@nongnu.org Sender: qemu-devel-bounces+importer=patchew.org@nongnu.org X-ZohoMail-DKIM: pass (identity @redhat.com) X-ZM-MESSAGEID: 1707387183627100013 Currently the default input range can extend to 64 bits. On x86, when the virtio-iommu protects vfio devices, the physical iommu may support only 39 bits. Let's set the default to 39, as done for the intel-iommu. On ARM we set 48b as a default (matching SMMUv3 SMMU_IDR5.VAX =3D=3D 0). We use hw_compat_8_2 to handle the compatibility for machines before 9.0 which used to have a virtio-iommu default input range of 64 bits. Of course if aw-bits is set from the command line, the default is overriden. Signed-off-by: Eric Auger Reviewed-by: Zhenzhong Duan Tested-by: Yanghang Liu Reviewed-by: C=C3=A9dric Le Goater --- v2 -> v3: - collected Zhenzhong's R-b - use &error_abort instead of NULL error handle on object_property_get_uint() call (C=C3=A9dric) - use VTD_HOST_AW_39BIT (C=C3=A9dric) v1 -> v2: - set aw-bits to 48b on ARM - use hw_compat_8_2 to handle the compat for older machines which used 64b as a default --- hw/arm/virt.c | 6 ++++++ hw/core/machine.c | 5 ++++- hw/i386/pc.c | 6 ++++++ hw/virtio/virtio-iommu.c | 2 +- 4 files changed, 17 insertions(+), 2 deletions(-) diff --git a/hw/arm/virt.c b/hw/arm/virt.c index 368c2a415a..0994f2a560 100644 --- a/hw/arm/virt.c +++ b/hw/arm/virt.c @@ -2716,10 +2716,16 @@ static void virt_machine_device_pre_plug_cb(Hotplug= Handler *hotplug_dev, } else if (object_dynamic_cast(OBJECT(dev), TYPE_VIRTIO_MD_PCI)) { virtio_md_pci_pre_plug(VIRTIO_MD_PCI(dev), MACHINE(hotplug_dev), e= rrp); } else if (object_dynamic_cast(OBJECT(dev), TYPE_VIRTIO_IOMMU_PCI)) { + uint8_t aw_bits =3D object_property_get_uint(OBJECT(dev), + "aw-bits", &error_abort= ); hwaddr db_start =3D 0, db_end =3D 0; QList *reserved_regions; char *resv_prop_str; =20 + if (!aw_bits) { + qdev_prop_set_uint8(dev, "aw-bits", 48); + } + if (vms->iommu !=3D VIRT_IOMMU_NONE) { error_setg(errp, "virt machine does not support multiple IOMMU= s"); return; diff --git a/hw/core/machine.c b/hw/core/machine.c index fb5afdcae4..70ac96954c 100644 --- a/hw/core/machine.c +++ b/hw/core/machine.c @@ -30,9 +30,12 @@ #include "exec/confidential-guest-support.h" #include "hw/virtio/virtio-pci.h" #include "hw/virtio/virtio-net.h" +#include "hw/virtio/virtio-iommu.h" #include "audio/audio.h" =20 -GlobalProperty hw_compat_8_2[] =3D {}; +GlobalProperty hw_compat_8_2[] =3D { + { TYPE_VIRTIO_IOMMU_PCI, "aw-bits", "64" }, +}; const size_t hw_compat_8_2_len =3D G_N_ELEMENTS(hw_compat_8_2); =20 GlobalProperty hw_compat_8_1[] =3D { diff --git a/hw/i386/pc.c b/hw/i386/pc.c index 196827531a..ee2d379c90 100644 --- a/hw/i386/pc.c +++ b/hw/i386/pc.c @@ -1456,6 +1456,8 @@ static void pc_machine_device_pre_plug_cb(HotplugHand= ler *hotplug_dev, } else if (object_dynamic_cast(OBJECT(dev), TYPE_VIRTIO_MD_PCI)) { virtio_md_pci_pre_plug(VIRTIO_MD_PCI(dev), MACHINE(hotplug_dev), e= rrp); } else if (object_dynamic_cast(OBJECT(dev), TYPE_VIRTIO_IOMMU_PCI)) { + uint8_t aw_bits =3D object_property_get_uint(OBJECT(dev), + "aw-bits", &error_abort= ); /* Declare the APIC range as the reserved MSI region */ char *resv_prop_str =3D g_strdup_printf("0xfee00000:0xfeefffff:%d", VIRTIO_IOMMU_RESV_MEM_T_MSI); @@ -1464,6 +1466,10 @@ static void pc_machine_device_pre_plug_cb(HotplugHan= dler *hotplug_dev, qlist_append_str(reserved_regions, resv_prop_str); qdev_prop_set_array(dev, "reserved-regions", reserved_regions); =20 + if (!aw_bits) { + qdev_prop_set_uint8(dev, "aw-bits", VTD_HOST_AW_39BIT); + } + g_free(resv_prop_str); } =20 diff --git a/hw/virtio/virtio-iommu.c b/hw/virtio/virtio-iommu.c index 7870bdbeee..c468e9b13b 100644 --- a/hw/virtio/virtio-iommu.c +++ b/hw/virtio/virtio-iommu.c @@ -1529,7 +1529,7 @@ static Property virtio_iommu_properties[] =3D { DEFINE_PROP_LINK("primary-bus", VirtIOIOMMU, primary_bus, TYPE_PCI_BUS, PCIBus *), DEFINE_PROP_BOOL("boot-bypass", VirtIOIOMMU, boot_bypass, true), - DEFINE_PROP_UINT8("aw-bits", VirtIOIOMMU, aw_bits, 64), + DEFINE_PROP_UINT8("aw-bits", VirtIOIOMMU, aw_bits, 0), DEFINE_PROP_END_OF_LIST(), }; =20 --=20 2.41.0