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35890f8557
linux/drivers
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Jason Gunthorpe 35890f8557 vfio: Remove VFIO_TYPE1_NESTING_IOMMU 
This control causes the ARM SMMU drivers to choose a stage 2
implementation for the IO pagetable (vs the stage 1 usual default),
however this choice has no significant visible impact to the VFIO
user. Further qemu never implemented this and no other userspace user is
known.

The original description in commit f5c9ecebaf ("vfio/iommu_type1: add
new VFIO_TYPE1_NESTING_IOMMU IOMMU type") suggested this was to "provide
SMMU translation services to the guest operating system" however the rest
of the API to set the guest table pointer for the stage 1 and manage
invalidation was never completed, or at least never upstreamed, rendering
this part useless dead code.

Upstream has now settled on iommufd as the uAPI for controlling nested
translation. Choosing the stage 2 implementation should be done by through
the IOMMU_HWPT_ALLOC_NEST_PARENT flag during domain allocation.

Remove VFIO_TYPE1_NESTING_IOMMU and everything under it including the
enable_nesting iommu_domain_op.

Just in-case there is some userspace using this continue to treat
requesting it as a NOP, but do not advertise support any more.

Acked-by: Alex Williamson <alex.williamson@redhat.com>
Reviewed-by: Mostafa Saleh <smostafa@google.com>
Reviewed-by: Kevin Tian <kevin.tian@intel.com>
Reviewed-by: Jerry Snitselaar <jsnitsel@redhat.com>
Reviewed-by: Donald Dutile <ddutile@redhat.com>
Tested-by: Nicolin Chen <nicolinc@nvidia.com>
Signed-off-by: Nicolin Chen <nicolinc@nvidia.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
Link: https://lore.kernel.org/r/1-v4-9e99b76f3518+3a8-smmuv3_nesting_jgg@nvidia.com
Signed-off-by: Will Deacon <will@kernel.org>
2024-11-05 10:24:16 +00:00
..
accel dma-mapping updates for linux 6.12 2024-09-19 11:12:49 +02:00
accessibility
acpi ACPI fixes for 6.12-rc3 2024-10-11 11:32:10 -07:00
amba
android
ata ata: libata: avoid superfluous disk spin down + spin up during hibernation 2024-10-09 16:21:19 +02:00
atm
auxdisplay move asm/unaligned.h to linux/unaligned.h 2024-10-02 17:23:23 -04:00
base pmdomain core: 2024-10-11 11:26:15 -07:00
bcma
block block-6.12-20241004 2024-10-04 10:43:44 -07:00
bluetooth Bluetooth: btusb: Don't fail external suspend requests 2024-10-04 16:54:25 -04:00
bus Driver core update for 6.12-rc1 2024-09-27 08:48:37 -07:00
cache
cdrom
cdx
char virtio: bugfixes 2024-10-07 11:33:26 -07:00
clk move asm/unaligned.h to linux/unaligned.h 2024-10-02 17:23:23 -04:00
clocksource Updates for x86 timers: 2024-09-17 15:27:01 +02:00
comedi move asm/unaligned.h to linux/unaligned.h 2024-10-02 17:23:23 -04:00
connector
counter move asm/unaligned.h to linux/unaligned.h 2024-10-02 17:23:23 -04:00
cpufreq Power management fixes for 6.12-rc2 2024-10-04 11:57:15 -07:00
cpuidle pmdomain core: 2024-09-18 10:49:45 +02:00
crypto move asm/unaligned.h to linux/unaligned.h 2024-10-02 17:23:23 -04:00
cxl move asm/unaligned.h to linux/unaligned.h 2024-10-02 17:23:23 -04:00
dax device-dax: correct pgoff align in dax_set_mapping() 2024-10-09 12:47:19 -07:00
dca
devfreq
dio
dma soc: convert ep93xx to devicetree 2024-09-26 12:00:25 -07:00
dma-buf drm next for 6.12-rc1 2024-09-19 10:18:15 +02:00
dpll
edac - Drop a now obsolete ppc4xx_edac driver 2024-09-16 06:36:37 +02:00
eisa
extcon Char/Misc and other driver changes for 6.12-rc1 2024-09-26 10:13:08 -07:00
firewire move asm/unaligned.h to linux/unaligned.h 2024-10-02 17:23:23 -04:00
firmware drm fixes for 6.12-rc2 2024-10-04 11:25:14 -07:00
fpga move asm/unaligned.h to linux/unaligned.h 2024-10-02 17:23:23 -04:00
fsi move asm/unaligned.h to linux/unaligned.h 2024-10-02 17:23:23 -04:00
gnss [tree-wide] finally take no_llseek out 2024-09-27 08:18:43 -07:00
gpio gpio: aspeed: Use devm_clk api to manage clock source 2024-10-08 16:01:58 +02:00
gpu pmdomain core: 2024-10-11 11:26:15 -07:00
greybus move asm/unaligned.h to linux/unaligned.h 2024-10-02 17:23:23 -04:00
hid Getting rid of asm/unaligned.h includes 2024-10-02 16:42:28 -07:00
hsi
hte
hv drm next for 6.12-rc1 2024-09-19 10:18:15 +02:00
hwmon hwmon: (max1668) Add missing dependency on REGMAP_I2C 2024-10-07 08:42:32 -07:00
hwspinlock
hwtracing [tree-wide] finally take no_llseek out 2024-09-27 08:18:43 -07:00
i2c i2c-for-6.12-rc2 2024-10-05 10:31:04 -07:00
i3c i3c: master: svc: Fix use after free vulnerability in svc_i3c_master Driver Due to Race Condition 2024-09-17 16:51:45 +02:00
idle intel_idle: fix ACPI _CST matching for newer Xeon platforms 2024-09-25 22:30:33 +02:00
iio move asm/unaligned.h to linux/unaligned.h 2024-10-02 17:23:23 -04:00
infiniband [tree-wide] finally take no_llseek out 2024-09-27 08:18:43 -07:00
input Getting rid of asm/unaligned.h includes 2024-10-02 16:42:28 -07:00
interconnect
iommu vfio: Remove VFIO_TYPE1_NESTING_IOMMU 2024-11-05 10:24:16 +00:00
ipack
irqchip Merge tag 'irq-core-2024-09-16' into loongarch-next 2024-09-17 22:20:12 +08:00
isdn move asm/unaligned.h to linux/unaligned.h 2024-10-02 17:23:23 -04:00
leds move asm/unaligned.h to linux/unaligned.h 2024-10-02 17:23:23 -04:00
macintosh move asm/unaligned.h to linux/unaligned.h 2024-10-02 17:23:23 -04:00
mailbox mailbox, remoteproc: omap2+: fix compile testing 2024-09-27 09:11:05 -05:00
mcb
md Getting rid of asm/unaligned.h includes 2024-10-02 16:42:28 -07:00
media move asm/unaligned.h to linux/unaligned.h 2024-10-02 17:23:23 -04:00
memory
memstick move asm/unaligned.h to linux/unaligned.h 2024-10-02 17:23:23 -04:00
message SCSI misc on 20240928 2024-09-29 09:22:34 -07:00
mfd move asm/unaligned.h to linux/unaligned.h 2024-10-02 17:23:23 -04:00
misc misc: sgi-gru: Don't disable preemption in GRU driver 2024-10-09 12:47:01 -07:00
mmc MMC core: 2024-10-11 11:23:21 -07:00
most
mtd move asm/unaligned.h to linux/unaligned.h 2024-10-02 17:23:23 -04:00
mux
net slip: make slhc_remember() more robust against malicious packets 2024-10-10 09:06:32 -07:00
nfc move asm/unaligned.h to linux/unaligned.h 2024-10-02 17:23:23 -04:00
ntb ntb: Force physically contiguous allocation of rx ring buffers 2024-09-20 10:51:25 -04:00
nubus
nvdimm virtio: features, fixes, cleanups 2024-09-26 08:43:17 -07:00
nvme move asm/unaligned.h to linux/unaligned.h 2024-10-02 17:23:23 -04:00
nvmem Char/Misc and other driver changes for 6.12-rc1 2024-09-26 10:13:08 -07:00
of of: Skip kunit tests when arm64+ACPI doesn't populate root node 2024-10-10 12:43:01 -05:00
opp OPP: fix error code in dev_pm_opp_set_config() 2024-10-02 01:27:50 +02:00
parisc
parport
pci move asm/unaligned.h to linux/unaligned.h 2024-10-02 17:23:23 -04:00
pcmcia move asm/unaligned.h to linux/unaligned.h 2024-10-02 17:23:23 -04:00
peci move asm/unaligned.h to linux/unaligned.h 2024-10-02 17:23:23 -04:00
perf drivers/perf: riscv: Align errno for unsupported perf event 2024-10-01 02:47:39 -07:00
phy phy-for-6.12 2024-09-23 14:05:10 -07:00
pinctrl soc: convert ep93xx to devicetree 2024-09-26 12:00:25 -07:00
platform platform-drivers-x86 for v6.12-2 2024-10-06 11:11:01 -07:00
pmdomain pmdomain: qcom-cpr: Fix the return of uninitialized variable 2024-10-02 12:38:53 +02:00
pnp
power move asm/unaligned.h to linux/unaligned.h 2024-10-02 17:23:23 -04:00
powercap powercap: intel_rapl_msr: Add PL4 support for Arrowlake-U 2024-10-08 21:39:33 +02:00
pps [tree-wide] finally take no_llseek out 2024-09-27 08:18:43 -07:00
ps3
ptp move asm/unaligned.h to linux/unaligned.h 2024-10-02 17:23:23 -04:00
pwm soc: convert ep93xx to devicetree 2024-09-26 12:00:25 -07:00
rapidio
ras
regulator regulator: sm5703: Remove because it is unused and fails to build 2024-09-13 19:08:14 +01:00
remoteproc mhu-v3, omap2+ : fix kconfig dependencies 2024-09-29 09:53:04 -07:00
reset
rpmsg rpmsg: glink: Avoid -Wflex-array-member-not-at-end warnings 2024-09-13 14:09:47 -07:00
rtc move asm/unaligned.h to linux/unaligned.h 2024-10-02 17:23:23 -04:00
s390 more s390 updates for 6.12 merge window 2024-09-28 09:11:46 -07:00
sbus [tree-wide] finally take no_llseek out 2024-09-27 08:18:43 -07:00
scsi SCSI fixes on 20241011 2024-10-12 09:24:13 -07:00
sh sh: intc: Replace simple_strtoul() with kstrtoul() 2024-09-26 17:25:29 +02:00
siox
slimbus
soc move asm/unaligned.h to linux/unaligned.h 2024-10-02 17:23:23 -04:00
soundwire soundwire updates for 6.12 2024-09-23 14:00:46 -07:00
spi spi: Fixes for v6.12 2024-10-05 10:25:04 -07:00
spmi
ssb
staging move asm/unaligned.h to linux/unaligned.h 2024-10-02 17:23:23 -04:00
target move asm/unaligned.h to linux/unaligned.h 2024-10-02 17:23:23 -04:00
tc
tee
thermal Power management updates for 6.12-rc3 2024-10-11 11:41:20 -07:00
thunderbolt
tty move asm/unaligned.h to linux/unaligned.h 2024-10-02 17:23:23 -04:00
ufs SCSI fixes on 20241011 2024-10-12 09:24:13 -07:00
uio uio: Constify struct kobj_type 2024-09-11 16:02:54 +02:00
usb USB fixes for 6.12-rc3 2024-10-13 09:21:36 -07:00
vdpa virtio: bugfixes 2024-10-07 11:33:26 -07:00
vfio vfio: Remove VFIO_TYPE1_NESTING_IOMMU 2024-11-05 10:24:16 +00:00
vhost virtio: bugfixes 2024-10-07 11:33:26 -07:00
video fbdev: Switch back to struct platform_driver::remove() 2024-10-08 21:47:18 +02:00
virt [tree-wide] finally take no_llseek out 2024-09-27 08:18:43 -07:00
virtio virtio: bugfixes 2024-10-07 11:33:26 -07:00
w1
watchdog move asm/unaligned.h to linux/unaligned.h 2024-10-02 17:23:23 -04:00
xen xen: Fix config option reference in XEN_PRIVCMD definition 2024-10-02 16:14:30 +02:00
zorro
Kconfig
Makefile