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11b5ce95be
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Corvin Köhne 11b5ce95be vfio/igd: add new bar0 quirk to emulate BDSM mirror 
The BDSM register is mirrored into MMIO space at least for gen 11 and
later devices. Unfortunately, the Windows driver reads the register
value from MMIO space instead of PCI config space for those devices [1].
Therefore, we either have to keep a 1:1 mapping for the host and guest
address or we have to emulate the MMIO register too. Using the igd in
legacy mode is already hard due to it's many constraints. Keeping a 1:1
mapping may not work in all cases and makes it even harder to use. An
MMIO emulation has to trap the whole MMIO page. This makes accesses to
this page slower compared to using second level address translation.
Nevertheless, it doesn't have any constraints and I haven't noticed any
performance degradation yet making it a better solution.

[1] 5c351bee0f/devicemodel/hw/pci/passthrough.c (L650-L653)

Signed-off-by: Corvin Köhne <c.koehne@beckhoff.com>
Reviewed-by: Alex Williamson <alex.williamson@redhat.com>
2024-09-17 10:37:55 +02:00
..
9pfs hw/xen: Make XenDevOps structures const 2024-06-04 11:53:43 +02:00
acpi hw: Use device_class_set_legacy_reset() instead of opencoding 2024-09-13 15:31:44 +01:00
adc hw: Use device_class_set_legacy_reset() instead of opencoding 2024-09-13 15:31:44 +01:00
alpha alpha: switch boards to "default y" 2024-05-03 15:47:47 +02:00
arm hvf: arm: Implement and use hvf_get_physical_address_range 2024-09-13 15:31:47 +01:00
audio hw: Use device_class_set_legacy_reset() instead of opencoding 2024-09-13 15:31:44 +01:00
avr avr: switch boards to "default y" 2024-05-03 15:47:47 +02:00
block hw/block: Remove TC58128 NAND EEPROM 2024-09-13 20:10:49 +02:00
char hw/char: replace assert(0) with g_assert_not_reached() 2024-09-13 20:12:16 +02:00
core hw/core: replace assert(0) with g_assert_not_reached() 2024-09-13 20:12:16 +02:00
cpu hw: Add a Kconfig switch for the TYPE_CPU_CLUSTER device 2024-04-25 12:48:12 +02:00
cxl hw: Use device_class_set_legacy_reset() instead of opencoding 2024-09-13 15:31:44 +01:00
display hw: Use device_class_set_legacy_reset() instead of opencoding 2024-09-13 15:31:44 +01:00
dma hw/dma: Remove ETRAX_FS DMA device 2024-09-13 20:11:13 +02:00
fsi hw: Use device_class_set_legacy_reset() instead of opencoding 2024-09-13 15:31:44 +01:00
gpio hw/gpio: remove break after g_assert_not_reached() 2024-09-13 20:12:16 +02:00
hppa hw/hppa/machine: Replace g_memdup() by g_memdup2() 2024-05-08 19:42:45 +02:00
hyperv hw: Use device_class_set_legacy_reset() instead of opencoding 2024-09-13 15:31:44 +01:00
i2c hw: Use device_class_set_legacy_reset() instead of opencoding 2024-09-13 15:31:44 +01:00
i386 hw: Use device_class_set_legacy_reset() instead of opencoding 2024-09-13 15:31:44 +01:00
ide hw: Use device_class_set_legacy_reset() instead of opencoding 2024-09-13 15:31:44 +01:00
input hw/input/adb-mouse: convert to use QemuInputHandler 2024-09-13 20:11:13 +02:00
intc hw/intc: Remove TYPE_ETRAX_FS_PIC device 2024-09-13 20:10:50 +02:00
ipack hw/ipack: Constify VMState 2023-12-29 11:17:30 +11:00
ipmi hw/ipmi: Constify VMState 2023-12-29 11:17:30 +11:00
isa hw: Use device_class_set_legacy_reset() instead of opencoding 2024-09-13 15:31:44 +01:00
loongarch hw/loongarch: Add acpi SPCR table support 2024-09-12 20:57:54 +08:00
m68k hw: Use device_class_set_legacy_reset() instead of opencoding 2024-09-13 15:31:44 +01:00
mem hw: Use device_class_set_legacy_reset() instead of opencoding 2024-09-13 15:31:44 +01:00
microblaze microblaze: switch boards to "default y" 2024-05-03 15:47:47 +02:00
mips hw/mips/loongson3_virt: Fix condition of IPI IOCSR connection 2024-08-20 00:28:24 +02:00
misc hw/misc: remove break after g_assert_not_reached() 2024-09-13 20:12:16 +02:00
net hw/net: Remove TYPE_ETRAX_FS_ETH device 2024-09-13 20:11:12 +02:00
nubus hw/nubus/nubus-device: Range check 'slot' property 2024-09-08 11:49:49 +02:00
nvme hw: Use device_class_set_legacy_reset() instead of opencoding 2024-09-13 15:31:44 +01:00
nvram hw: Use device_class_set_legacy_reset() instead of opencoding 2024-09-13 15:31:44 +01:00
openrisc kconfig: express dependency of individual boards on libfdt 2024-05-10 15:45:15 +02:00
pci hw/pci/pci-hmp-cmds: Avoid displaying bogus size in 'info pci' 2024-09-11 09:46:04 -04:00
pci-bridge hw: Use device_class_set_legacy_reset() instead of opencoding 2024-09-13 15:31:44 +01:00
pci-host hw/pci-host: remove break after g_assert_not_reached() 2024-09-13 20:12:16 +02:00
pcmcia
ppc hw: Use device_class_set_legacy_reset() instead of opencoding 2024-09-13 15:31:44 +01:00
remote hw: Use device_class_set_legacy_reset() instead of opencoding 2024-09-13 15:31:44 +01:00
riscv Revert "hw/riscv/virt.c: imsics DT: add '#msi-cells'" 2024-08-19 14:34:49 +10:00
rtc hw: Use device_class_set_legacy_reset() instead of opencoding 2024-09-13 15:31:44 +01:00
rx kconfig: express dependency of individual boards on libfdt 2024-05-10 15:45:15 +02:00
s390x hw: Use device_class_set_legacy_reset() instead of opencoding 2024-09-13 15:31:44 +01:00
scsi hw: Use device_class_set_legacy_reset() instead of opencoding 2024-09-13 15:31:44 +01:00
sd hw: Use device_class_set_legacy_reset() instead of opencoding 2024-09-13 15:31:44 +01:00
sensor hw/sensor/tmp105: Lower 4 bit of limit registers are always 0 2024-09-13 20:11:13 +02:00
sh4 hw/sh4: Remove sh7750_register_io_device() helper 2024-09-13 20:10:49 +02:00
smbios smbios: make memory device size configurable per Machine 2024-07-22 20:15:41 -04:00
sparc hw: Use device_class_set_legacy_reset() instead of opencoding 2024-09-13 15:31:44 +01:00
sparc64 hw: Use device_class_set_legacy_reset() instead of opencoding 2024-09-13 15:31:44 +01:00
ssi hw: Use device_class_set_legacy_reset() instead of opencoding 2024-09-13 15:31:44 +01:00
timer hw/timer: Remove TYPE_ETRAX_FS_TIMER device 2024-09-13 20:11:13 +02:00
tpm hw: Use device_class_set_legacy_reset() instead of opencoding 2024-09-13 15:31:44 +01:00
tricore hw: Use device_class_set_legacy_reset() instead of opencoding 2024-09-13 15:31:44 +01:00
ufs hw/ufs: minor bug fixes related to ufs-test 2024-09-06 18:04:16 +09:00
usb hw: Use device_class_set_legacy_reset() instead of opencoding 2024-09-13 15:31:44 +01:00
vfio vfio/igd: add new bar0 quirk to emulate BDSM mirror 2024-09-17 10:37:55 +02:00
virtio hw: Use device_class_set_legacy_reset() instead of opencoding 2024-09-13 15:31:44 +01:00
watchdog hw/watchdog: replace assert(0) with g_assert_not_reached() 2024-09-13 20:12:16 +02:00
xen hw/xen: pvh-common: Add support for creating PCIe/GPEX 2024-09-04 16:50:43 +02:00
xenpv hw/xen: Register framebuffer backend via xen_backend_init() 2024-06-04 11:53:43 +02:00
xtensa hw/xtensa: require libfdt 2024-05-10 15:45:15 +02:00
Kconfig hw/timer: Remove TYPE_ETRAX_FS_TIMER device 2024-09-13 20:11:13 +02:00
meson.build hw/cris: Remove image loader helper 2024-09-13 20:10:50 +02:00