From 350785d41d8bb0b799dd16ea04a7232dc8d6093a Mon Sep 17 00:00:00 2001 From: Shaoqin Huang Date: Thu, 17 Jul 2025 06:09:39 -0400 Subject: [PATCH 1/3] ramfb: Add property to control if load the romfile Currently the ramfb device loads the vgabios-ramfb.bin unconditionally, but only the x86 need the vgabios-ramfb.bin, this can cause that when use the release package on arm64 it can't find the vgabios-ramfb.bin. Because only seabios will use the vgabios-ramfb.bin, load the rom logic is x86-specific. For other !x86 platforms, the edk2 ships an EFI driver for ramfb, so they don't need to load the romfile. So add a new property use-legacy-x86-rom in both ramfb and vfio_pci device, because the vfio display also use the ramfb_setup() to load the vgabios-ramfb.bin file. After have this property, the machine type can set the compatibility to not load the vgabios-ramfb.bin if the arch doesn't need it. For now the default value is true but it will be turned off by default in subsequent patch when compats get properly handled. Reviewed-by: Zhao Liu Reviewed-by: Eric Auger Signed-off-by: Shaoqin Huang Message-ID: <20250717100941.2230408-2-shahuang@redhat.com> Signed-off-by: Gerd Hoffmann --- hw/display/ramfb-standalone.c | 5 ++++- hw/display/ramfb-stubs.c | 2 +- hw/display/ramfb.c | 6 ++++-- hw/vfio/display.c | 4 ++-- hw/vfio/pci.c | 2 ++ hw/vfio/pci.h | 1 + include/hw/display/ramfb.h | 2 +- 7 files changed, 15 insertions(+), 7 deletions(-) diff --git a/hw/display/ramfb-standalone.c b/hw/display/ramfb-standalone.c index 08f2d5db4e..82d8c69f89 100644 --- a/hw/display/ramfb-standalone.c +++ b/hw/display/ramfb-standalone.c @@ -17,6 +17,7 @@ struct RAMFBStandaloneState { QemuConsole *con; RAMFBState *state; bool migrate; + bool use_legacy_x86_rom; }; static void display_update_wrapper(void *dev) @@ -39,7 +40,7 @@ static void ramfb_realizefn(DeviceState *dev, Error **errp) RAMFBStandaloneState *ramfb = RAMFB(dev); ramfb->con = graphic_console_init(dev, 0, &wrapper_ops, dev); - ramfb->state = ramfb_setup(errp); + ramfb->state = ramfb_setup(ramfb->use_legacy_x86_rom, errp); } static bool migrate_needed(void *opaque) @@ -62,6 +63,8 @@ static const VMStateDescription ramfb_dev_vmstate = { static const Property ramfb_properties[] = { DEFINE_PROP_BOOL("x-migrate", RAMFBStandaloneState, migrate, true), + DEFINE_PROP_BOOL("use-legacy-x86-rom", RAMFBStandaloneState, + use_legacy_x86_rom, true), }; static void ramfb_class_initfn(ObjectClass *klass, const void *data) diff --git a/hw/display/ramfb-stubs.c b/hw/display/ramfb-stubs.c index cf64733b10..b83551357b 100644 --- a/hw/display/ramfb-stubs.c +++ b/hw/display/ramfb-stubs.c @@ -8,7 +8,7 @@ void ramfb_display_update(QemuConsole *con, RAMFBState *s) { } -RAMFBState *ramfb_setup(Error **errp) +RAMFBState *ramfb_setup(bool romfile, Error **errp) { error_setg(errp, "ramfb support not available"); return NULL; diff --git a/hw/display/ramfb.c b/hw/display/ramfb.c index 8c0f907673..9a17d97d07 100644 --- a/hw/display/ramfb.c +++ b/hw/display/ramfb.c @@ -135,7 +135,7 @@ const VMStateDescription ramfb_vmstate = { } }; -RAMFBState *ramfb_setup(Error **errp) +RAMFBState *ramfb_setup(bool romfile, Error **errp) { FWCfgState *fw_cfg = fw_cfg_find(); RAMFBState *s; @@ -147,7 +147,9 @@ RAMFBState *ramfb_setup(Error **errp) s = g_new0(RAMFBState, 1); - rom_add_vga("vgabios-ramfb.bin"); + if (romfile) { + rom_add_vga("vgabios-ramfb.bin"); + } fw_cfg_add_file_callback(fw_cfg, "etc/ramfb", NULL, ramfb_fw_cfg_write, s, &s->cfg, sizeof(s->cfg), false); diff --git a/hw/vfio/display.c b/hw/vfio/display.c index 9c6f5aa265..faacd9019a 100644 --- a/hw/vfio/display.c +++ b/hw/vfio/display.c @@ -365,7 +365,7 @@ static bool vfio_display_dmabuf_init(VFIOPCIDevice *vdev, Error **errp) &vfio_display_dmabuf_ops, vdev); if (vdev->enable_ramfb) { - vdev->dpy->ramfb = ramfb_setup(errp); + vdev->dpy->ramfb = ramfb_setup(vdev->use_legacy_x86_rom, errp); if (!vdev->dpy->ramfb) { return false; } @@ -494,7 +494,7 @@ static bool vfio_display_region_init(VFIOPCIDevice *vdev, Error **errp) &vfio_display_region_ops, vdev); if (vdev->enable_ramfb) { - vdev->dpy->ramfb = ramfb_setup(errp); + vdev->dpy->ramfb = ramfb_setup(vdev->use_legacy_x86_rom, errp); if (!vdev->dpy->ramfb) { return false; } diff --git a/hw/vfio/pci.c b/hw/vfio/pci.c index 1093b28df7..0b969b3359 100644 --- a/hw/vfio/pci.c +++ b/hw/vfio/pci.c @@ -3809,6 +3809,8 @@ static const TypeInfo vfio_pci_dev_info = { static const Property vfio_pci_dev_nohotplug_properties[] = { DEFINE_PROP_BOOL("ramfb", VFIOPCIDevice, enable_ramfb, false), + DEFINE_PROP_BOOL("use-legacy-x86-rom", VFIOPCIDevice, + use_legacy_x86_rom, true), DEFINE_PROP_ON_OFF_AUTO("x-ramfb-migrate", VFIOPCIDevice, ramfb_migrate, ON_OFF_AUTO_AUTO), }; diff --git a/hw/vfio/pci.h b/hw/vfio/pci.h index 495fae737d..826db8c131 100644 --- a/hw/vfio/pci.h +++ b/hw/vfio/pci.h @@ -188,6 +188,7 @@ struct VFIOPCIDevice { bool no_kvm_ioeventfd; bool no_vfio_ioeventfd; bool enable_ramfb; + bool use_legacy_x86_rom; OnOffAuto ramfb_migrate; bool defer_kvm_irq_routing; bool clear_parent_atomics_on_exit; diff --git a/include/hw/display/ramfb.h b/include/hw/display/ramfb.h index a7e0019144..172aa6dc89 100644 --- a/include/hw/display/ramfb.h +++ b/include/hw/display/ramfb.h @@ -6,7 +6,7 @@ /* ramfb.c */ typedef struct RAMFBState RAMFBState; void ramfb_display_update(QemuConsole *con, RAMFBState *s); -RAMFBState *ramfb_setup(Error **errp); +RAMFBState *ramfb_setup(bool romfile, Error **errp); extern const VMStateDescription ramfb_vmstate; From b53a3bba5e02df7cbdb26f8bf8bcb11b8290e863 Mon Sep 17 00:00:00 2001 From: Shaoqin Huang Date: Thu, 17 Jul 2025 06:09:40 -0400 Subject: [PATCH 2/3] vfio: Move the TYPE_* to hw/vfio/types.h Move the TYPE_* to a new file hw/vfio/types.h because the TYPE_VFIO_PCI will be used in later patch, but directly include the hw/vfio/pci.h can cause some compilation error when cross build the windows version. The hw/vfio/types.h can be included to mitigate that problem. Signed-off-by: Shaoqin Huang Message-ID: <20250717100941.2230408-3-shahuang@redhat.com> Reviewed-by: Zhao Liu Signed-off-by: Gerd Hoffmann --- hw/vfio/pci.h | 10 +--------- hw/vfio/types.h | 21 +++++++++++++++++++++ 2 files changed, 22 insertions(+), 9 deletions(-) create mode 100644 hw/vfio/types.h diff --git a/hw/vfio/pci.h b/hw/vfio/pci.h index 826db8c131..0fd151c5dc 100644 --- a/hw/vfio/pci.h +++ b/hw/vfio/pci.h @@ -14,6 +14,7 @@ #include "system/memory.h" #include "hw/pci/pci_device.h" +#include "hw/vfio/types.h" #include "hw/vfio/vfio-device.h" #include "hw/vfio/vfio-region.h" #include "qemu/event_notifier.h" @@ -119,17 +120,8 @@ typedef struct VFIOMSIXInfo { MemoryRegion *pba_region; } VFIOMSIXInfo; -/* - * TYPE_VFIO_PCI_BASE is an abstract type used to share code - * between VFIO implementations that use a kernel driver - * with those that use user sockets. - */ -#define TYPE_VFIO_PCI_BASE "vfio-pci-base" OBJECT_DECLARE_SIMPLE_TYPE(VFIOPCIDevice, VFIO_PCI_BASE) -#define TYPE_VFIO_PCI "vfio-pci" -/* TYPE_VFIO_PCI shares struct VFIOPCIDevice. */ - struct VFIOPCIDevice { PCIDevice pdev; VFIODevice vbasedev; diff --git a/hw/vfio/types.h b/hw/vfio/types.h new file mode 100644 index 0000000000..fa20c29b9f --- /dev/null +++ b/hw/vfio/types.h @@ -0,0 +1,21 @@ +/* + * VFIO types definition + * + * Copyright Red Hat, Inc. 2025 + * + * SPDX-License-Identifier: GPL-2.0-or-later + */ +#ifndef HW_VFIO_VFIO_TYPES_H +#define HW_VFIO_VFIO_TYPES_H + +/* + * TYPE_VFIO_PCI_BASE is an abstract type used to share code + * between VFIO implementations that use a kernel driver + * with those that use user sockets. + */ +#define TYPE_VFIO_PCI_BASE "vfio-pci-base" + +#define TYPE_VFIO_PCI "vfio-pci" +/* TYPE_VFIO_PCI shares struct VFIOPCIDevice. */ + +#endif /* HW_VFIO_VFIO_TYPES_H */ From d5fcf0d960d893b1765e6388cefca9c690839267 Mon Sep 17 00:00:00 2001 From: Shaoqin Huang Date: Thu, 17 Jul 2025 06:09:41 -0400 Subject: [PATCH 3/3] hw/i386: Add the ramfb romfile compatibility ramfb is a sysbus device so it can only used for machine types where it is explicitly enabled: # git grep machine_class_allow_dynamic_sysbus_dev.*TYPE_RAMFB_DEVICE hw/arm/virt.c: machine_class_allow_dynamic_sysbus_dev(mc, TYPE_RAMFB_DEVICE); hw/i386/microvm.c: machine_class_allow_dynamic_sysbus_dev(mc, TYPE_RAMFB_DEVICE); hw/i386/pc_piix.c: machine_class_allow_dynamic_sysbus_dev(m, TYPE_RAMFB_DEVICE); hw/i386/pc_q35.c: machine_class_allow_dynamic_sysbus_dev(m, TYPE_RAMFB_DEVICE); hw/loongarch/virt.c: machine_class_allow_dynamic_sysbus_dev(mc, TYPE_RAMFB_DEVICE); hw/riscv/virt.c: machine_class_allow_dynamic_sysbus_dev(mc, TYPE_RAMFB_DEVICE); So these six are the only machine types we have to worry about. The three x86 machine types (pc, q35, microvm) will actually use the rom (when booting with seabios). For arm/riscv/loongarch virt we want to disable the rom. This patch sets ramfb romfile option to false by default, except for x86 machines types (pc, q35, microvm) which need the rom file when booting with seabios and machine types <= 10.0 (handling the case of arm virt, for compat reasons). At the same time, set the "use-legacy-x86-rom" property to true on those historical versioned machine types in order to avoid the memory layout being changed. Acked-by: Michael S. Tsirkin Reviewed-by: Zhao Liu Reviewed-by: Eric Auger Signed-off-by: Shaoqin Huang Message-ID: <20250717100941.2230408-4-shahuang@redhat.com> Signed-off-by: Gerd Hoffmann --- hw/core/machine.c | 2 ++ hw/display/ramfb-standalone.c | 2 +- hw/i386/microvm.c | 3 +++ hw/i386/pc_piix.c | 10 ++++++++++ hw/i386/pc_q35.c | 3 +++ hw/vfio/pci.c | 2 +- 6 files changed, 20 insertions(+), 2 deletions(-) diff --git a/hw/core/machine.c b/hw/core/machine.c index e869821b22..a7043e2a34 100644 --- a/hw/core/machine.c +++ b/hw/core/machine.c @@ -39,6 +39,8 @@ GlobalProperty hw_compat_10_0[] = { { "scsi-hd", "dpofua", "off" }, + { "ramfb", "use-legacy-x86-rom", "true"}, + { "vfio-pci", "use-legacy-x86-rom", "true" }, }; const size_t hw_compat_10_0_len = G_N_ELEMENTS(hw_compat_10_0); diff --git a/hw/display/ramfb-standalone.c b/hw/display/ramfb-standalone.c index 82d8c69f89..72b2071aed 100644 --- a/hw/display/ramfb-standalone.c +++ b/hw/display/ramfb-standalone.c @@ -64,7 +64,7 @@ static const VMStateDescription ramfb_dev_vmstate = { static const Property ramfb_properties[] = { DEFINE_PROP_BOOL("x-migrate", RAMFBStandaloneState, migrate, true), DEFINE_PROP_BOOL("use-legacy-x86-rom", RAMFBStandaloneState, - use_legacy_x86_rom, true), + use_legacy_x86_rom, false), }; static void ramfb_class_initfn(ObjectClass *klass, const void *data) diff --git a/hw/i386/microvm.c b/hw/i386/microvm.c index e0daf0d4fc..d90b69a162 100644 --- a/hw/i386/microvm.c +++ b/hw/i386/microvm.c @@ -49,6 +49,7 @@ #include "hw/acpi/generic_event_device.h" #include "hw/pci-host/gpex.h" #include "hw/usb/xhci.h" +#include "hw/vfio/types.h" #include "elf.h" #include "kvm/kvm_i386.h" @@ -633,6 +634,8 @@ GlobalProperty microvm_properties[] = { * so reserving io space is not going to work. Turn it off. */ { "pcie-root-port", "io-reserve", "0" }, + { TYPE_RAMFB_DEVICE, "use-legacy-x86-rom", "true" }, + { TYPE_VFIO_PCI, "use-legacy-x86-rom", "true" }, }; static void microvm_class_init(ObjectClass *oc, const void *data) diff --git a/hw/i386/pc_piix.c b/hw/i386/pc_piix.c index a3285fbc64..ad5caff3a5 100644 --- a/hw/i386/pc_piix.c +++ b/hw/i386/pc_piix.c @@ -49,6 +49,7 @@ #include "hw/i2c/smbus_eeprom.h" #include "system/memory.h" #include "hw/acpi/acpi.h" +#include "hw/vfio/types.h" #include "qapi/error.h" #include "qemu/error-report.h" #include "system/xen.h" @@ -77,6 +78,13 @@ static const int ide_iobase2[MAX_IDE_BUS] = { 0x3f6, 0x376 }; static const int ide_irq[MAX_IDE_BUS] = { 14, 15 }; #endif +static GlobalProperty pc_piix_compat_defaults[] = { + { TYPE_RAMFB_DEVICE, "use-legacy-x86-rom", "true" }, + { TYPE_VFIO_PCI, "use-legacy-x86-rom", "true" }, +}; +static const size_t pc_piix_compat_defaults_len = + G_N_ELEMENTS(pc_piix_compat_defaults); + /* * Return the global irq number corresponding to a given device irq * pin. We could also use the bus number to have a more precise mapping. @@ -492,6 +500,8 @@ static void pc_i440fx_machine_options(MachineClass *m) pc_set_south_bridge); object_class_property_set_description(oc, "x-south-bridge", "Use a different south bridge than PIIX3"); + compat_props_add(m->compat_props, + pc_piix_compat_defaults, pc_piix_compat_defaults_len); } static void pc_i440fx_machine_10_1_options(MachineClass *m) diff --git a/hw/i386/pc_q35.c b/hw/i386/pc_q35.c index cf871cfdad..9b9519fa02 100644 --- a/hw/i386/pc_q35.c +++ b/hw/i386/pc_q35.c @@ -45,6 +45,7 @@ #include "hw/i386/pc.h" #include "hw/i386/amd_iommu.h" #include "hw/i386/intel_iommu.h" +#include "hw/vfio/types.h" #include "hw/virtio/virtio-iommu.h" #include "hw/display/ramfb.h" #include "hw/ide/pci.h" @@ -67,6 +68,8 @@ static GlobalProperty pc_q35_compat_defaults[] = { { TYPE_VIRTIO_IOMMU_PCI, "aw-bits", "39" }, + { TYPE_RAMFB_DEVICE, "use-legacy-x86-rom", "true" }, + { TYPE_VFIO_PCI, "use-legacy-x86-rom", "true" }, }; static const size_t pc_q35_compat_defaults_len = G_N_ELEMENTS(pc_q35_compat_defaults); diff --git a/hw/vfio/pci.c b/hw/vfio/pci.c index 0b969b3359..174499ecec 100644 --- a/hw/vfio/pci.c +++ b/hw/vfio/pci.c @@ -3810,7 +3810,7 @@ static const TypeInfo vfio_pci_dev_info = { static const Property vfio_pci_dev_nohotplug_properties[] = { DEFINE_PROP_BOOL("ramfb", VFIOPCIDevice, enable_ramfb, false), DEFINE_PROP_BOOL("use-legacy-x86-rom", VFIOPCIDevice, - use_legacy_x86_rom, true), + use_legacy_x86_rom, false), DEFINE_PROP_ON_OFF_AUTO("x-ramfb-migrate", VFIOPCIDevice, ramfb_migrate, ON_OFF_AUTO_AUTO), };