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bh=1t8VWc2veUeWD2kah/MNb40uj4RjwtmcTWLm0rHOIYg=; b=AYZ2w5jt1Ihv7iTSt5+8CcdNYGCy+zOMI2wrsPRSaHjCx1XR580qi9jYXmr+JjJmIS/OHy gD42gSCnmost9QaRTnJ93UkxDn4yRuOSGVB7JERGb6smFn1W+kuJwmYePu+Qb0h7h5Gh1w gpcv/zeWrlRjMmlJepQ68uH0W+3LnwU= X-MC-Unique: DgRq1Vx8M0WZ3V2JPOCorQ-1 From: marcandre.lureau@redhat.com To: qemu-devel@nongnu.org Cc: Alex Williamson , lersek@redhat.com, =?UTF-8?q?C=C3=A9dric=20Le=20Goater?= , kraxel@redhat.com, =?UTF-8?q?Marc-Andr=C3=A9=20Lureau?= , Eduardo Habkost , Marcel Apfelbaum , =?UTF-8?q?Philippe=20Mathieu-Daud=C3=A9?= , Yanan Wang Subject: [PATCH v3 5/5] hw/vfio: add ramfb migration support Date: Tue, 3 Oct 2023 12:56:44 +0400 Message-ID: <20231003085644.1220326-6-marcandre.lureau@redhat.com> In-Reply-To: <20231003085644.1220326-1-marcandre.lureau@redhat.com> References: <20231003085644.1220326-1-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 10.11.54.6 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=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_H3=0.001, RCVD_IN_MSPIKE_WL=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: 1696323483776100003 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 --- hw/vfio/pci.h | 3 +++ hw/core/machine.c | 1 + hw/vfio/display.c | 23 +++++++++++++++++++++++ hw/vfio/pci.c | 32 ++++++++++++++++++++++++++++++++ 4 files changed, 59 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 47a07d1d9b..f2f8940a85 100644 --- a/hw/core/machine.c +++ b/hw/core/machine.c @@ -32,6 +32,7 @@ =20 GlobalProperty hw_compat_8_1[] =3D { { "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..de5bf71dd1 100644 --- a/hw/vfio/display.c +++ b/hw/vfio/display.c @@ -542,3 +542,26 @@ void vfio_display_finalize(VFIOPCIDevice *vdev) vfio_display_edid_exit(vdev->dpy); g_free(vdev->dpy); } + +static bool migrate_needed(void *opaque) +{ + /* + * If we are here, it's because vfio_display_needed(), which is only t= rue + * when dpy->ramfb_migrate atm. + * + * If the migration condition is changed, we should check here if + * ramfb_migrate is true. (this will need a way to lookup the associat= ed + * VFIOPCIDevice somehow, or fields to be moved, ..) + */ + return true; +} + +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), + } +}; diff --git a/hw/vfio/pci.c b/hw/vfio/pci.c index 3b2ca3c24c..4689f2e5c1 100644 --- a/hw/vfio/pci.c +++ b/hw/vfio/pci.c @@ -2608,6 +2608,25 @@ static bool vfio_msix_present(void *opaque, int vers= ion_id) return msix_present(pdev); } =20 +static bool vfio_display_needed(void *opaque) +{ + VFIOPCIDevice *vdev =3D opaque; + + /* the only thing that justifies the VFIODisplay sub-section atm */ + return vdev->ramfb_migrate !=3D ON_OFF_AUTO_OFF; +} + +const VMStateDescription vmstate_vfio_display =3D { + .name =3D "VFIOPCIDevice/VFIODisplay", + .version_id =3D 1, + .minimum_version_id =3D 1, + .needed =3D vfio_display_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 +2635,10 @@ 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 @@ -3275,6 +3298,14 @@ static void vfio_realize(PCIDevice *pdev, Error **er= rp) if (!vfio_migration_realize(vbasedev, errp)) { goto out_deregister; } + 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 migration"); + goto out_deregister; + } + } } =20 vfio_register_err_notifier(vdev); @@ -3484,6 +3515,7 @@ 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 --=20 2.41.0