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bh=sknTPDX5xEZQD4Dp2Q2kubZlqkQG0jZQDmkWj8MF5Os=; b=cHxIFacUgtIDLpY75r5+qHMqqPmCDv50Mav7fYWmFhNnRkbpn3i+0Fy8ojLXMv/OdthAA5 Oj112ldlvBitACCeV4/Izg0HmlU1UK1aDIasWDT+wTgmC4AgPygYHQmBfPyAafeFVWC1Rf nkUXFvyz1S8ku35h379Lo6tdw1cGoTY= X-MC-Unique: dybJrIB4MVOUX-ip73y0OA-1 From: marcandre.lureau@redhat.com To: qemu-devel@nongnu.org Cc: =?UTF-8?q?C=C3=A9dric=20Le=20Goater?= , lersek@redhat.com, =?UTF-8?q?Marc-Andr=C3=A9=20Lureau?= , Eduardo Habkost , Marcel Apfelbaum , =?UTF-8?q?Philippe=20Mathieu-Daud=C3=A9?= , Yanan Wang , Alex Williamson , Paolo Bonzini Subject: [PATCH v5 3/3] hw/vfio: add ramfb migration support Date: Mon, 9 Oct 2023 10:32:47 +0400 Message-ID: <20231009063247.119333-4-marcandre.lureau@redhat.com> In-Reply-To: <20231009063247.119333-1-marcandre.lureau@redhat.com> References: <20231009063247.119333-1-marcandre.lureau@redhat.com> MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable X-Scanned-By: MIMEDefang 3.1 on 10.11.54.3 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=marcandre.lureau@redhat.com; helo=us-smtp-delivery-124.mimecast.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, DKIMWL_WL_HIGH=-0.001, 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_H4=-0.01, RCVD_IN_MSPIKE_WL=-0.01, 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: 1696833215803100007 From: Marc-Andr=C3=A9 Lureau Add a "VFIODisplay" subsection whenever "x-ramfb-migrate" is turned on. Turn it off by default on machines <=3D 8.1 for compatibility reasons. Signed-off-by: Marc-Andr=C3=A9 Lureau Reviewed-by: Laszlo Ersek --- hw/vfio/pci.h | 3 +++ hw/core/machine.c | 1 + hw/vfio/display.c | 21 +++++++++++++++++++++ hw/vfio/pci.c | 44 ++++++++++++++++++++++++++++++++++++++++++++ stubs/ramfb.c | 2 ++ 5 files changed, 71 insertions(+) diff --git a/hw/vfio/pci.h b/hw/vfio/pci.h index 2d836093a8..fd06695542 100644 --- a/hw/vfio/pci.h +++ b/hw/vfio/pci.h @@ -173,6 +173,7 @@ struct VFIOPCIDevice { bool no_kvm_ioeventfd; bool no_vfio_ioeventfd; bool enable_ramfb; + OnOffAuto ramfb_migrate; bool defer_kvm_irq_routing; bool clear_parent_atomics_on_exit; VFIODisplay *dpy; @@ -226,4 +227,6 @@ void vfio_display_reset(VFIOPCIDevice *vdev); int vfio_display_probe(VFIOPCIDevice *vdev, Error **errp); void vfio_display_finalize(VFIOPCIDevice *vdev); =20 +extern const VMStateDescription vfio_display_vmstate; + #endif /* HW_VFIO_VFIO_PCI_H */ diff --git a/hw/core/machine.c b/hw/core/machine.c index 6305f2d7a4..05aef2cf9f 100644 --- a/hw/core/machine.c +++ b/hw/core/machine.c @@ -35,6 +35,7 @@ GlobalProperty hw_compat_8_1[] =3D { { TYPE_PCI_BRIDGE, "x-pci-express-writeable-slt-bug", "true" }, { "ramfb", "x-migrate", "off" }, + { "vfio-pci-nohotplug", "x-ramfb-migrate", "off" } }; const size_t hw_compat_8_1_len =3D G_N_ELEMENTS(hw_compat_8_1); =20 diff --git a/hw/vfio/display.c b/hw/vfio/display.c index bec864f482..2739ba56ec 100644 --- a/hw/vfio/display.c +++ b/hw/vfio/display.c @@ -542,3 +542,24 @@ void vfio_display_finalize(VFIOPCIDevice *vdev) vfio_display_edid_exit(vdev->dpy); g_free(vdev->dpy); } + +static bool migrate_needed(void *opaque) +{ + VFIODisplay *dpy =3D opaque; + bool ramfb_exists =3D dpy->ramfb !=3D NULL; + + /* see vfio_display_migration_needed() */ + assert(ramfb_exists); + return ramfb_exists; +} + +const VMStateDescription vfio_display_vmstate =3D { + .name =3D "VFIODisplay", + .version_id =3D 1, + .minimum_version_id =3D 1, + .needed =3D migrate_needed, + .fields =3D (VMStateField[]) { + VMSTATE_STRUCT_POINTER(ramfb, VFIODisplay, ramfb_vmstate, RAMFBSta= te), + VMSTATE_END_OF_LIST(), + } +}; diff --git a/hw/vfio/pci.c b/hw/vfio/pci.c index 3b2ca3c24c..e44ed21180 100644 --- a/hw/vfio/pci.c +++ b/hw/vfio/pci.c @@ -2608,6 +2608,32 @@ static bool vfio_msix_present(void *opaque, int vers= ion_id) return msix_present(pdev); } =20 +static bool vfio_display_migration_needed(void *opaque) +{ + VFIOPCIDevice *vdev =3D opaque; + + /* + * We need to migrate the VFIODisplay object if ramfb *migration* was + * explicitly requested (in which case we enforced both ramfb=3Don and + * display=3Don), or ramfb migration was left at the default "auto" + * setting, and *ramfb* was explicitly requested (in which case we + * enforced display=3Don). + */ + return vdev->ramfb_migrate =3D=3D ON_OFF_AUTO_ON || + (vdev->ramfb_migrate =3D=3D ON_OFF_AUTO_AUTO && vdev->enable_ramfb= ); +} + +const VMStateDescription vmstate_vfio_display =3D { + .name =3D "VFIOPCIDevice/VFIODisplay", + .version_id =3D 1, + .minimum_version_id =3D 1, + .needed =3D vfio_display_migration_needed, + .fields =3D (VMStateField[]){ + VMSTATE_STRUCT_POINTER(dpy, VFIOPCIDevice, vfio_display_vmstate, V= FIODisplay), + VMSTATE_END_OF_LIST() + } +}; + const VMStateDescription vmstate_vfio_pci_config =3D { .name =3D "VFIOPCIDevice", .version_id =3D 1, @@ -2616,6 +2642,10 @@ const VMStateDescription vmstate_vfio_pci_config =3D= { VMSTATE_PCI_DEVICE(pdev, VFIOPCIDevice), VMSTATE_MSIX_TEST(pdev, VFIOPCIDevice, vfio_msix_present), VMSTATE_END_OF_LIST() + }, + .subsections =3D (const VMStateDescription*[]) { + &vmstate_vfio_display, + NULL } }; =20 @@ -3271,6 +3301,19 @@ static void vfio_realize(PCIDevice *pdev, Error **er= rp) } } =20 + if (vdev->ramfb_migrate =3D=3D ON_OFF_AUTO_ON && !vdev->enable_ramfb) { + warn_report("x-ramfb-migrate=3Don but ramfb=3Doff"); + vdev->ramfb_migrate =3D ON_OFF_AUTO_OFF; + } + if (vbasedev->enable_migration =3D=3D ON_OFF_AUTO_OFF) { + if (vdev->ramfb_migrate =3D=3D ON_OFF_AUTO_AUTO) { + vdev->ramfb_migrate =3D ON_OFF_AUTO_OFF; + } else if (vdev->ramfb_migrate =3D=3D ON_OFF_AUTO_ON) { + error_setg(errp, "x-ramfb-migrate requires enable-migration"); + goto out_deregister; + } + } + if (!pdev->failover_pair_id) { if (!vfio_migration_realize(vbasedev, errp)) { goto out_deregister; @@ -3484,6 +3527,7 @@ static const TypeInfo vfio_pci_dev_info =3D { =20 static Property vfio_pci_dev_nohotplug_properties[] =3D { DEFINE_PROP_BOOL("ramfb", VFIOPCIDevice, enable_ramfb, false), + DEFINE_PROP_ON_OFF_AUTO("x-ramfb-migrate", VFIOPCIDevice, ramfb_migrat= e, ON_OFF_AUTO_AUTO), DEFINE_PROP_END_OF_LIST(), }; =20 diff --git a/stubs/ramfb.c b/stubs/ramfb.c index 48143f3354..cf64733b10 100644 --- a/stubs/ramfb.c +++ b/stubs/ramfb.c @@ -2,6 +2,8 @@ #include "qapi/error.h" #include "hw/display/ramfb.h" =20 +const VMStateDescription ramfb_vmstate =3D {}; + void ramfb_display_update(QemuConsole *con, RAMFBState *s) { } --=20 2.41.0