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c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1739543665; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding; bh=LkPS0FGDxU+t+9lUB5LeY1ecp32+uH20EfBO9h0BOpk=; b=NyQg5hbfVZpqx/ZSG4UQOcEy6UBbWo6YVPXRXGQHntW+oDmp/LsJ8/Q6IatjeffNfRh8Vv lNi1gTzXoXD1fb0WlqKdFtWga5t8T43C6aQz8MvP3XosWcbK/fLifQHWIhTdaBbMXCzMy+ p+lGinc9zdoBGAXgAnE/hDNodu0sHXo= X-MC-Unique: lf3SCU5YP3GBK2jhNM2jTA-1 X-Mimecast-MFC-AGG-ID: lf3SCU5YP3GBK2jhNM2jTA_1739543662 From: =?UTF-8?q?C=C3=A9dric=20Le=20Goater?= To: qemu-devel@nongnu.org Cc: Alex Williamson , tomitamoeko@gmail.com, corvin.koehne@gmail.com, Kirti Wankhede , Joao Martins , =?UTF-8?q?C=C3=A9dric=20Le=20Goater?= , Tony Krowiak , Eric Farman , Eric Auger Subject: [PATCH v3] vfio: Add property documentation Date: Fri, 14 Feb 2025 15:34:15 +0100 Message-ID: <20250214143415.1686526-1-clg@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 10.30.177.93 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=170.10.133.124; envelope-from=clg@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-Spam_score_int: -37 X-Spam_score: -3.8 X-Spam_bar: --- X-Spam_report: (-3.8 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-1.732, 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, RCVD_IN_VALIDITY_RPBL_BLOCKED=0.001, RCVD_IN_VALIDITY_SAFE_BLOCKED=0.001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 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: 1739543683836019100 Investigate the git history to uncover when and why the VFIO properties were introduced and update the models. This is mostly targeting vfio-pci device, since vfio-platform, vfio-ap and vfio-ccw devices are simpler. Sort the properties based on the QEMU version in which they were introduced. Cc: Tony Krowiak Cc: Eric Farman Cc: Eric Auger Signed-off-by: C=C3=A9dric Le Goater --- Should we introduce documentation for properties like the kernel has in Documentation/ABI/*/sysfs-* ? Changes in v3: - Re-organized the vfio-pci properties based on the QEMU version in which they were introduced - Added property labels - Improved description as suggested by Alex, Tomita and Corvin Changes in v2: - Fixed version numbers - Fixed #ifdef in vfio/ccw.c - Addressed vfio-pci-nohotplug - Organize the vfio-pci properties in topics =20 hw/vfio/ap.c | 9 ++++ hw/vfio/ccw.c | 15 ++++++ hw/vfio/pci.c | 122 +++++++++++++++++++++++++++++++++++++++++++++ hw/vfio/platform.c | 25 ++++++++++ 4 files changed, 171 insertions(+) diff --git a/hw/vfio/ap.c b/hw/vfio/ap.c index 30b08ad375d5ecae886c5000fbaa364799fe76d0..c7ab4ff57ada0ed0e5a76f52b5a= 05c86ca4fe0b4 100644 --- a/hw/vfio/ap.c +++ b/hw/vfio/ap.c @@ -257,6 +257,15 @@ static void vfio_ap_class_init(ObjectClass *klass, voi= d *data) dc->hotpluggable =3D true; device_class_set_legacy_reset(dc, vfio_ap_reset); dc->bus_type =3D TYPE_AP_BUS; + + object_class_property_set_description(klass, /* 3.1 */ + "sysfsdev", + "Host sysfs path of assigned dev= ice"); +#ifdef CONFIG_IOMMUFD + object_class_property_set_description(klass, /* 9.0 */ + "iommufd", + "Set host IOMMUFD backend device= "); +#endif } =20 static const TypeInfo vfio_ap_info =3D { diff --git a/hw/vfio/ccw.c b/hw/vfio/ccw.c index 67bc137f9be6d43c5970c6271f3cdbfffd8a32de..ea766ae26c744c05515e1cc80a4= 86a3462d82834 100644 --- a/hw/vfio/ccw.c +++ b/hw/vfio/ccw.c @@ -717,6 +717,21 @@ static void vfio_ccw_class_init(ObjectClass *klass, vo= id *data) cdc->handle_halt =3D vfio_ccw_handle_halt; cdc->handle_clear =3D vfio_ccw_handle_clear; cdc->handle_store =3D vfio_ccw_handle_store; + + object_class_property_set_description(klass, /* 2.10 */ + "sysfsdev", + "Host sysfs path of assigned dev= ice"); + object_class_property_set_description(klass, /* 3.0 */ + "force-orb-pfch", + "Force unlimited prefetch"); +#ifdef CONFIG_IOMMUFD + object_class_property_set_description(klass, /* 9.0 */ + "iommufd", + "Set host IOMMUFD backend device= "); +#endif + object_class_property_set_description(klass, /* 9.2 */ + "loadparm", + "Define which devices that can b= e used for booting"); } =20 static const TypeInfo vfio_ccw_info =3D { diff --git a/hw/vfio/pci.c b/hw/vfio/pci.c index 9a55e7b77324babf7295132b08e3ba23b482a291..cdf4cdcf88c143ff145427cae3f= d64239a2d1e74 100644 --- a/hw/vfio/pci.c +++ b/hw/vfio/pci.c @@ -3433,6 +3433,119 @@ static void vfio_pci_dev_class_init(ObjectClass *kl= ass, void *data) pdc->exit =3D vfio_exitfn; pdc->config_read =3D vfio_pci_read_config; pdc->config_write =3D vfio_pci_write_config; + + object_class_property_set_description(klass, /* 1.3 */ + "host", + "Host PCI address [domain:] of assigned device"); + object_class_property_set_description(klass, /* 1.3 */ + "x-intx-mmap-timeout-ms", + "When EOI is not provided by KVM= /QEMU, wait time " + "(milliseconds) to re-enable dev= ice direct access " + "after INTx (DEBUG)"); + object_class_property_set_description(klass, /* 1.5 */ + "x-vga", + "Expose VGA address spaces for d= evice"); + object_class_property_set_description(klass, /* 2.3 */ + "x-req", + "Disable device request notifica= tion support (DEBUG)"); + object_class_property_set_description(klass, /* 2.4 and 2.5 */ + "x-no-mmap", + "Disable MMAP for device. Allows= to trace MMIO " + "accesses (DEBUG)"); + object_class_property_set_description(klass, /* 2.5 */ + "x-no-kvm-intx", + "Disable direct VFIO->KVM INTx i= njection. Allows to " + "trace INTx interrupts (DEBUG)"); + object_class_property_set_description(klass, /* 2.5 */ + "x-no-kvm-msi", + "Disable direct VFIO->KVM MSI in= jection. Allows to " + "trace MSI interrupts (DEBUG)"); + object_class_property_set_description(klass, /* 2.5 */ + "x-no-kvm-msix", + "Disable direct VFIO->KVM MSIx i= njection. Allows to " + "trace MSIx interrupts (DEBUG)"); + object_class_property_set_description(klass, /* 2.5 */ + "x-pci-vendor-id", + "Override PCI Vendor ID with pro= vided value (DEBUG)"); + object_class_property_set_description(klass, /* 2.5 */ + "x-pci-device-id", + "Override PCI device ID with pro= vided value (DEBUG)"); + object_class_property_set_description(klass, /* 2.5 */ + "x-pci-sub-vendor-id", + "Override PCI Sub Vendor ID with= provided value (DEBUG)"); + object_class_property_set_description(klass, /* 2.5 */ + "x-pci-sub-device-id", + "Override PCI Sub Device ID with= provided value (DEBUG)"); + object_class_property_set_description(klass, /* 2.6 */ + "sysfsdev", + "Host sysfs path of assigned dev= ice"); + object_class_property_set_description(klass, /* 2.7 */ + "x-igd-opregion", + "Expose host IGD OpRegion to gue= st"); + object_class_property_set_description(klass, /* 2.7 (See c4c45e943e51)= */ + "x-igd-gms", + "Override IGD data stolen memory= size (32MiB units). " + "Assign 00:02.0 from the host to= 00:02.0 in the VM"); + object_class_property_set_description(klass, /* 2.11 */ + "x-nv-gpudirect-clique", + "Add NVIDIA GPUDirect capability= indicating P2P DMA " + "clique for device [0-15]"); + object_class_property_set_description(klass, /* 2.12 */ + "x-no-geforce-quirks", + "Disable GeForce quirks (for NVI= DIA Quadro/GRID/Tesla). " + "Improves performance"); + object_class_property_set_description(klass, /* 2.12 */ + "display", + "Enable display support for devi= ce, ex. vGPU"); + object_class_property_set_description(klass, /* 2.12 */ + "x-msix-relocation", + "Specify MSI-X MMIO relocation t= o the end of specified " + "existing BAR or new BAR to avoi= d virtualization overhead " + "due to adjacent device register= s (sPAPR)"); + object_class_property_set_description(klass, /* 3.0 */ + "x-no-kvm-ioeventfd", + "Disable registration of ioevent= fds with KVM (DEBUG)"); + object_class_property_set_description(klass, /* 3.0 */ + "x-no-vfio-ioeventfd", + "Disable linking of KVM ioeventf= ds to VFIO ioeventfds" + " (NVIDIA, DEBUG)"); + object_class_property_set_description(klass, /* 3.1 */ + "x-balloon-allowed", + "Override allowing ballooning wi= th device (DEBUG, DANGER)"); + object_class_property_set_description(klass, /* 3.2 */ + "xres", + "Set X display resolution the vG= PU should use"); + object_class_property_set_description(klass, /* 3.2 */ + "yres", + "Set Y display resolution the vG= PU should use"); + object_class_property_set_description(klass, /* 5.2 */ + "x-pre-copy-dirty-page-tracking", + "Disable dirty pages tracking du= ring iterative phase"); + object_class_property_set_description(klass, /* 5.2, 8.0 non-experimet= al */ + "enable-migration", + "Enale device migration. Also re= quires a host VFIO PCI " + "variant driver with migration s= upport enabled"); + object_class_property_set_description(klass, /* 8.1 */ + "vf-token", + "Specify UUID VF token. Required= for VF when PF is owned " + "by another VFIO driver"); +#ifdef CONFIG_IOMMUFD + object_class_property_set_description(klass, /* 9.0 */ + "iommufd", + "Set host IOMMUFD backend device= "); +#endif + object_class_property_set_description(klass, /* 9.1 */ + "x-device-dirty-page-tracking", + "Disable device dirty page track= ing and use " + "container-based dirty page trac= king"); + object_class_property_set_description(klass, /* 9.1 */ + "migration-events", + "Emit VFIO migration QAPI event = when a VFIO device " + "changes its migration state. Fo= r management applications"); + object_class_property_set_description(klass, /* 9.1 */ + "skip-vsc-check", + "Skip config space check for Ven= dor Specific Capability " + "(NVIDIA, DEBUG)"); } =20 static const TypeInfo vfio_pci_dev_info =3D { @@ -3461,6 +3574,15 @@ static void vfio_pci_nohotplug_dev_class_init(Object= Class *klass, void *data) =20 device_class_set_props(dc, vfio_pci_dev_nohotplug_properties); dc->hotpluggable =3D false; + + object_class_property_set_description(klass, /* 3.1 */ + "ramfb", + "Enable ramfb to provide pre-boo= t graphics for devices " + "enabling display option"); + object_class_property_set_description(klass, /* 8.2 */ + "x-ramfb-migrate", + "Override default migration supp= ort for ramfb support " + "(DEBUG)"); } =20 static const TypeInfo vfio_pci_nohotplug_dev_info =3D { diff --git a/hw/vfio/platform.c b/hw/vfio/platform.c index 1070a2113a17edb9ebafb5066e51ee2bc52a767d..61b8b856fac26e26a4805dc2d5e= 65266b907ef58 100644 --- a/hw/vfio/platform.c +++ b/hw/vfio/platform.c @@ -674,6 +674,31 @@ static void vfio_platform_class_init(ObjectClass *klas= s, void *data) set_bit(DEVICE_CATEGORY_MISC, dc->categories); /* Supported by TYPE_VIRT_MACHINE */ dc->user_creatable =3D true; + + object_class_property_set_description(klass, /* 2.4 */ + "host", + "Host device name of assigned de= vice"); + object_class_property_set_description(klass, /* 2.4 and 2.5 */ + "x-no-mmap", + "Disable MMAP for device. Allows= to trace MMIO " + "accesses (DEBUG)"); + object_class_property_set_description(klass, /* 2.4 */ + "mmap-timeout-ms", + "When EOI is not provided by KVM= /QEMU, wait time " + "(milliseconds) to re-enable dev= ice direct access " + "after INTx (DEBUG)"); + object_class_property_set_description(klass, /* 2.4 */ + "x-irqfd", + "Allow disabling irqfd support (= DEBUG)"); + object_class_property_set_description(klass, /* 2.6 */ + "sysfsdev", + "Host sysfs path of assigned dev= ice"); +#ifdef CONFIG_IOMMUFD + object_class_property_set_description(klass, /* 9.0 */ + "iommufd", + "Set host IOMMUFD backend device= "); +#endif + } =20 static const TypeInfo vfio_platform_dev_info =3D { --=20 2.48.1