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OpenCloudOS-Kernel
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Jason Gunthorpe 0d8227b622 vfio: Use IOMMU_CAP_ENFORCE_CACHE_COHERENCY for vfio_file_enforced_coherent() 
iommufd doesn't establish the iommu_domains until after the device FD is
opened, even if the container has been set. This design is part of moving
away from the group centric iommu APIs.

This is fine, except that the normal sequence of establishing the kvm
wbinvd won't work:

   group = open("/dev/vfio/XX")
   ioctl(group, VFIO_GROUP_SET_CONTAINER)
   ioctl(kvm, KVM_DEV_VFIO_GROUP_ADD)
   ioctl(group, VFIO_GROUP_GET_DEVICE_FD)

As the domains don't start existing until GET_DEVICE_FD. Further,
GET_DEVICE_FD requires that KVM_DEV_VFIO_GROUP_ADD already be done as that
is what sets the group->kvm and thus device->kvm for the driver to use
during open.

Now that we have device centric cap ops and the new
IOMMU_CAP_ENFORCE_CACHE_COHERENCY we know what the iommu_domain will be
capable of without having to create it. Use this to compute
vfio_file_enforced_coherent() and resolve the ordering problems.

VFIO always tries to upgrade domains to enforce cache coherency, it never
attaches a device that supports enforce cache coherency to a less capable
domain, so the cap test is a sufficient proxy for the ultimate
outcome. iommufd also ensures that devices that set the cap will be
connected to enforcing domains.

Link: https://lore.kernel.org/r/4-v4-42cd2eb0e3eb+335a-vfio_iommufd_jgg@nvidia.com
Reviewed-by: Kevin Tian <kevin.tian@intel.com>
Reviewed-by: Alex Williamson <alex.williamson@redhat.com>
Tested-by: Alex Williamson <alex.williamson@redhat.com>
Tested-by: Nicolin Chen <nicolinc@nvidia.com>
Tested-by: Yi Liu <yi.l.liu@intel.com>
Tested-by: Lixiao Yang <lixiao.yang@intel.com>
Tested-by: Matthew Rosato <mjrosato@linux.ibm.com>
Tested-by: Yu He <yu.he@intel.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
 		2022-12-02 11:52:03 -04:00
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accessibility
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acpi ACPI and device properties fixes for 6.1-rc3 2022-10-28 16:48:29 -07:00
amba
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android Scheduler changes for v6.1: 2022-10-10 09:10:28 -07:00
ata ata: ahci_qoriq: Fix compilation warning 2022-10-18 08:02:14 +09:00
atm
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auxdisplay
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base ACPI and device properties fixes for 6.1-rc3 2022-10-28 16:48:29 -07:00
bcma Interrupt subsystem updates: 2022-10-12 10:23:24 -07:00
block block-6.1-2022-10-28 2022-10-29 18:06:52 -07:00
bluetooth
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bus Char/Misc and other driver changes for 6.1-rc1 2022-10-08 08:56:37 -07:00
cdrom
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char random: use arch_get_random*_early() in random_init() 2022-10-29 00:24:03 +02:00
clk This is the final part of the clk patches for this merge window. 2022-10-16 11:08:19 -07:00
clocksource A boring time, timekeeping, timers update: 2022-10-10 10:16:00 -07:00
comedi
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connector
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counter counter: 104-quad-8: Fix race getting function mode and direction 2022-10-23 20:39:26 -04:00
cpufreq cpufreq: intel_pstate: hybrid: Use known scaling factor for P-cores 2022-10-25 15:09:23 +02:00
cpuidle RISC-V Patches for the 6.1 Merge Window, Part 1 2022-10-09 13:24:01 -07:00
crypto This update includes the following changes: 2022-10-10 13:04:25 -07:00
cxl
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dax libnvdimm for 6.1 2022-10-14 18:41:41 -07:00
dca
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devfreq PM / devfreq: rockchip-dfi: Fix an error message 2022-09-26 03:59:43 +09:00
dio
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dma iommu: Remove SVM_FLAG_SUPERVISOR_MODE support 2022-11-03 15:47:45 +01:00
dma-buf whack-a-mole: cropped up open-coded file_inode() uses... 2022-10-06 17:22:11 -07:00
edac Merge patch series "Use composable cache instead of L2 cache" 2022-10-13 11:07:13 -07:00
eisa
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extcon Char/Misc and other driver changes for 6.1-rc1 2022-10-08 08:56:37 -07:00
firewire
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firmware efi: runtime: Don't assume virtual mappings are missing if VA == PA == 0 2022-10-21 11:09:41 +02:00
fpga Char/Misc and other driver changes for 6.1-rc1 2022-10-08 08:56:37 -07:00
fsi fsi: core: Check error number after calling ida_simple_get 2022-09-28 21:10:57 +09:30
gnss
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gpio gpio: tegra: Convert to immutable irq chip 2022-10-20 13:47:54 +02:00
gpu i915/gvt: Move gvt mapping cache initialization to intel_vgpu_init_dev() 2022-12-02 11:49:26 -04:00
greybus
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hid for-linus-2022102101 2022-10-21 17:41:57 -07:00
hsi
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hte
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hv hyperv-next for 6.1 2022-10-10 13:59:01 -07:00
hwmon - Use the correct CPU capability clearing function on the error path in 2022-10-23 10:01:34 -07:00
hwspinlock
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hwtracing coresight: cti: Fix hang in cti_disable_hw() 2022-10-25 19:08:07 +02:00
i2c i2c: mlxbf: depend on ACPI; clean away ifdeffage 2022-10-21 07:59:35 +02:00
i3c i3c: master: Remove the wrong place of reattach. 2022-10-12 23:45:29 +02:00
idle
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iio iio: bmc150-accel-core: Fix unsafe buffer attributes 2022-10-17 08:51:26 +01:00
infiniband treewide: use get_random_u32() when possible 2022-10-11 17:42:58 -06:00
input Input updates for 6.1 merge window: 2022-10-11 10:53:25 -07:00
interconnect
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iommu iommufd: Add additional invariant assertions 2022-11-30 20:16:49 -04:00
ipack Char/Misc and other driver changes for 6.1-rc1 2022-10-08 08:56:37 -07:00
irqchip Interrupt subsystem updates: 2022-10-12 10:23:24 -07:00
isdn mISDN: hfcpci: Fix use-after-free bug in hfcpci_softirq 2022-10-09 19:11:54 +01:00
leds leds: simatic-ipc-leds-gpio: fix incorrect LED to GPIO mapping 2022-10-24 11:32:10 +02:00
macintosh powerpc updates for 6.1 2022-10-09 14:05:15 -07:00
mailbox mailbox: qcom-ipcc: flag IRQ NO_THREAD 2022-10-05 21:51:58 -05:00
mcb
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md dm clone: Fix typo in block_device format specifier 2022-10-18 17:17:48 -04:00
media media: vivid: set num_in/outputs to 0 if not supported 2022-10-25 16:43:34 +01:00
memory
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memstick
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message
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mfd Revert "mfd: syscon: Remove repetition of the regmap_get_val_endian()" 2022-10-23 12:04:56 -07:00
misc iommu: Remove SVM_FLAG_SUPERVISOR_MODE support 2022-11-03 15:47:45 +01:00
mmc mmc: sdhci_am654: 'select', not 'depends' REGMAP_MMIO 2022-10-26 11:48:03 +02:00
most
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mtd mtd: parsers: bcm47xxpart: Fix halfblock reads 2022-10-18 11:20:12 +02:00
mux
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net net: enetc: survive memory pressure without crashing 2022-10-27 11:32:25 -07:00
nfc nfc: virtual_ncidev: Fix memory leak in virtual_nci_send() 2022-10-20 21:13:04 -07:00
ntb
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nubus
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nvdimm libnvdimm for 6.1 2022-10-14 18:41:41 -07:00
nvme block-6.1-2022-10-28 2022-10-29 18:06:52 -07:00
nvmem nvmem: u-boot-env: fix crc32 casting type 2022-09-24 14:56:37 +02:00
of Devicetree updates for v6.1: 2022-10-10 13:13:51 -07:00
opp
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parisc parisc architecture fixes and updates for kernel v6.1-rc1: 2022-10-14 12:10:01 -07:00
parport
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pci PCI: Enable PASID only when ACS RR & UF enabled on upstream path 2022-11-03 15:47:47 +01:00
pcmcia pcmcia: remove AT91RM9200 Compact Flash driver 2022-09-27 08:12:16 +02:00
peci
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perf arm64 fixes: 2022-10-14 12:38:03 -07:00
phy pci-v6.1-changes 2022-10-11 11:08:18 -07:00
pinctrl pinctrl: ocelot: Fix incorrect trigger of the interrupt. 2022-10-18 10:42:10 +02:00
platform LoongArch fixes for v6.1-rc3 2022-10-30 09:44:06 -07:00
pnp Merge branches 'acpi-apei', 'acpi-wakeup', 'acpi-reboot' and 'acpi-thermal' 2022-10-10 18:11:11 +02:00
power power supply and reset changes for the v6.1 series 2022-10-07 11:48:30 -07:00
powercap Scheduler changes for v6.1: 2022-10-10 09:10:28 -07:00
pps
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ps3
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ptp ] ptp: ocp: remove symlink for second GNSS 2022-10-10 08:37:24 +01:00
pwm pwm: Changes for v6.1-rc1 2022-10-07 11:32:10 -07:00
rapidio
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ras
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regulator - Core Frameworks 2022-10-07 11:24:20 -07:00
remoteproc remoteproc: virtio: Fix warning on bindings by removing the of_match_table 2022-10-05 09:20:44 -06:00
reset Here's the main clk pull request for this merge window. We have some 2022-10-08 10:06:48 -07:00
rpmsg
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rtc rtc: cmos: fix build on non-ACPI platforms 2022-10-18 22:36:54 +02:00
s390 vfio/ap: Validate iova during dma_unmap and trigger irq disable 2022-12-02 11:50:10 -04:00
sbus
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scsi SCSI fixes on 20221028 2022-10-29 18:12:45 -07:00
sh
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siox
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slimbus slimbus: qcom-ngd: Add error handling in of_qcom_slim_ngd_register 2022-09-24 14:53:06 +02:00
soc Merge patch series "Use composable cache instead of L2 cache" 2022-10-13 11:07:13 -07:00
soundwire soundwire updates for 6.1-rc1 2022-10-07 16:13:55 -07:00
spi spi: Fixes for v6.1 2022-10-26 17:38:46 -07:00
spmi spmi: pmic-arb: increase SPMI transaction timeout delay 2022-09-30 14:33:23 +02:00
ssb
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staging media fixes for v6.1-rc2 2022-10-22 15:30:15 -07:00
target Merge branch '6.1/scsi-queue' into 6.1/scsi-fixes 2022-10-21 01:10:34 +00:00
tc
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tee - Yu Zhao's Multi-Gen LRU patches are here. They've been under test in 2022-10-10 17:53:04 -07:00
thermal thermal: intel_powerclamp: Use first online CPU as control_cpu 2022-10-15 19:33:57 +02:00
thunderbolt treewide: use get_random_u32() when possible 2022-10-11 17:42:58 -06:00
tty parisc architecture fixes and updates for kernel v6.1-rc1: 2022-10-14 12:10:01 -07:00
ufs scsi: ufs: core: Fix typo in comment 2022-10-22 03:29:32 +00:00
uio
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usb fbdev fixes for kernel 6.1-rc3: 2022-10-30 11:31:14 -07:00
vdpa virtio: fixes, features 2022-10-10 14:02:53 -07:00
vfio vfio: Use IOMMU_CAP_ENFORCE_CACHE_COHERENCY for vfio_file_enforced_coherent() 2022-12-02 11:52:03 -04:00
vhost virtio: fixes, features 2022-10-10 14:02:53 -07:00
video fbdev fixes for kernel 6.1-rc3: 2022-10-30 11:31:14 -07:00
virt Char/Misc and other driver changes for 6.1-rc1 2022-10-08 08:56:37 -07:00
virtio virtio_pci: use irq to detect interrupt support 2022-10-13 09:33:03 -04:00
vlynq
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w1 Char/Misc and other driver changes for 6.1-rc1 2022-10-08 08:56:37 -07:00
watchdog linux-watchdog 6.1-rc2 tag 2022-10-21 12:25:39 -07:00
xen xen: branch for v6.1-rc2 2022-10-21 14:43:09 -07:00
zorro
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Kconfig
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Makefile
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