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Alistair Popple 8f187163eb nouveau/svm: implement atomic SVM access 
Some NVIDIA GPUs do not support direct atomic access to system memory via
PCIe.  Instead this must be emulated by granting the GPU exclusive access
to the memory.  This is achieved by replacing CPU page table entries with
special swap entries that fault on userspace access.

The driver then grants the GPU permission to update the page undergoing
atomic access via the GPU page tables.  When CPU access to the page is
required a CPU fault is raised which calls into the device driver via MMU
notifiers to revoke the atomic access.  The original page table entries
are then restored allowing CPU access to proceed.

Link: https://lkml.kernel.org/r/20210616105937.23201-11-apopple@nvidia.com
Signed-off-by: Alistair Popple <apopple@nvidia.com>
Reviewed-by: Ben Skeggs <bskeggs@redhat.com>
Cc: Christoph Hellwig <hch@lst.de>
Cc: Hugh Dickins <hughd@google.com>
Cc: Jason Gunthorpe <jgg@nvidia.com>
Cc: John Hubbard <jhubbard@nvidia.com>
Cc: "Matthew Wilcox (Oracle)" <willy@infradead.org>
Cc: Peter Xu <peterx@redhat.com>
Cc: Ralph Campbell <rcampbell@nvidia.com>
Cc: Shakeel Butt <shakeelb@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2021-07-01 11:06:04 -07:00
..
accessibility TTY/Serial driver updates for 5.13-rc1 2021-04-26 11:20:10 -07:00
acpi Merge branch 'acpi-bus' 2021-06-11 17:57:24 +02:00
amba
android binder: Return EFAULT if we fail BINDER_ENABLE_ONEWAY_SPAM_DETECTION 2021-05-13 20:35:26 +02:00
ata pci-v5.13-changes 2021-05-05 13:24:11 -07:00
atm atm: firestream: Use fallthrough pseudo-keyword 2021-05-07 16:01:08 -07:00
auxdisplay treewide: remove editor modelines and cruft 2021-05-07 00:26:34 -07:00
base mm/vmstat: convert NUMA statistics to basic NUMA counters 2021-06-29 10:53:54 -07:00
bcma bcma: remove unused function 2021-04-18 09:36:56 +03:00
block zram: move backing_dev under macro CONFIG_ZRAM_WRITEBACK 2021-07-01 11:06:02 -07:00
bluetooth Networking fixes for 5.13-rc5, including fixes from bpf, wireless, 2021-06-04 18:25:39 -07:00
bus Char/Misc driver fixes for 5.13-rc6 2021-06-12 12:13:55 -07:00
cdrom cdrom: gdrom: initialize global variable at init time 2021-05-13 18:58:44 +02:00
char Char/misc driver fixes for 5.13-rc3 2021-05-20 06:31:52 -10:00
clk clk: Skip clk provider registration when np is NULL 2021-05-11 08:47:25 +02:00
clocksource clocksource/drivers/hyper-v: Re-enable VDSO_CLOCKMODE_HVCLOCK on X86 2021-05-14 14:55:13 +02:00
comedi staging: comedi: move out of staging directory 2021-04-15 09:26:25 +02:00
connector
counter
cpufreq Revert "cpufreq: CPPC: Add support for frequency invariance" 2021-06-14 15:55:02 +02:00
cpuidle
crypto Revert "crypto: cavium/nitrox - add an error message to explain the failure of pci_request_mem_regions" 2021-05-13 17:23:05 +02:00
cxl cxl/mem: Fix memory device capacity probing 2021-04-16 18:21:56 -07:00
dax fs: remove noop_set_page_dirty() 2021-06-29 10:53:48 -07:00
dca
devfreq
dio
dma dmaengine fixes for v5.13 2021-06-16 09:03:52 -07:00
dma-buf dma-buf: fix unintended pin/unpin warnings 2021-05-20 14:02:27 +02:00
edac x86/msr: Rename MSR_K8_SYSCFG to MSR_AMD64_SYSCFG 2021-05-10 07:51:38 +02:00
eisa
extcon - Core Frameworks 2021-04-28 15:59:13 -07:00
firewire The usual updates from the irq departement: 2021-04-26 09:43:16 -07:00
firmware EFI fixes for v5.13-rc 2021-05-23 11:39:02 +02:00
fpga ARM: SoC drivers for v5.13 2021-04-26 12:11:52 -07:00
fsi
gnss
gpio gpio: AMD8111 and TQMX86 require HAS_IOPORT_MAP 2021-06-25 12:13:53 +02:00
gpu nouveau/svm: implement atomic SVM access 2021-07-01 11:06:04 -07:00
greybus greybus: es2: fix kernel-doc warnings 2021-04-16 07:26:50 +02:00
hid HID: asus: Cleanup Asus T101HA keyboard-dock handling 2021-05-27 15:40:35 +02:00
hsi HSI: core: fix resource leaks in hsi_add_client_from_dt() 2021-04-16 00:14:49 +02:00
hv printk changes for 5.13 2021-04-27 18:09:44 -07:00
hwmon hwmon: (tps23861) correct shunt LSB values 2021-06-10 08:40:09 -07:00
hwspinlock
hwtracing ARM: 2021-05-01 10:14:08 -07:00
i2c i2c: robotfuzz-osif: fix control-request directions 2021-06-24 22:08:00 +02:00
i3c Revert "i3c master: fix missing destroy_workqueue() on error in i3c_master_register" 2021-04-24 22:21:01 +02:00
ide
idle
iio iio: adc: ad7793: Add missing error code in ad7793_setup() 2021-05-22 08:32:36 +01:00
infiniband IB/mlx5: Fix initializing CQ fragments buffer 2021-06-10 08:59:34 -03:00
input Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input 2021-05-06 23:37:55 -07:00
interconnect interconnect: qcom: Add missing MODULE_DEVICE_TABLE 2021-05-11 07:26:31 +03:00
iommu iommu/vt-d: Fix sysfs leak in alloc_iommu() 2021-05-27 16:07:08 +02:00
ipack
irqchip irqchip fixes for 5.13, take #2 2021-06-17 15:22:31 +02:00
isdn Networking fixes for 5.13-rc4, including fixes from bpf, netfilter, 2021-05-26 17:44:49 -10:00
leds leds: lp5523: check return value of lp5xx_read and jump to cleanup code 2021-05-13 17:30:15 +02:00
lightnvm lightnvm: deprecated OCSSD support and schedule it for removal in Linux 5.15 2021-04-13 09:16:12 -06:00
macintosh macintosh/via-pmu: Fix build warning 2021-04-16 23:57:51 +10:00
mailbox - qcom: enable support for SM8350 and SC7280 2021-04-28 16:10:33 -07:00
mcb
md block-5.13-2021-06-12 2021-06-12 11:59:58 -07:00
media media: videobuf2: use vma_lookup() in get_vaddr_frames() 2021-06-29 10:53:51 -07:00
memory .gitignore: prefix local generated files with a slash 2021-05-02 00:43:35 +09:00
memstick memstick: r592: ignore kfifo_out() return code again 2021-04-26 11:08:23 +02:00
message scsi: message: fusion: Remove unused local variable 'vtarget' 2021-04-13 01:39:12 -04:00
mfd - Core Frameworks 2021-04-28 15:59:13 -07:00
misc misc/sgi-gru/grufault: use vma_lookup() in gru_find_vma() 2021-06-29 10:53:51 -07:00
mmc mmc: meson-gx: use memcpy_to/fromio for dram-access-quirk 2021-06-14 14:02:33 +02:00
most Staging/IIO driver updates for 5.13-rc1 2021-04-26 11:14:21 -07:00
mtd mtd: parsers: ofpart: fix parsing subpartitions 2021-05-10 18:34:30 +02:00
mux
net Networking fixes for 5.13-rc7, including fixes from wireless, bpf, 2021-06-18 18:55:29 -07:00
nfc NFC: nfcmrvl: fix kernel-doc syntax in file headers 2021-05-23 17:26:38 -07:00
ntb
nubus
nvdimm include: remove pagemap.h from blkdev.h 2021-05-06 19:24:11 -07:00
nvme nvmet: fix freeing unallocated p2pmem 2021-06-02 10:10:38 +03:00
nvmem
of of: overlay: Remove redundant assignment to ret 2021-05-03 13:57:56 -05:00
opp
parisc
parport treewide: remove editor modelines and cruft 2021-05-07 00:26:34 -07:00
pci Revert "PCI: PM: Do not read power state in pci_enable_device_flags()" 2021-06-22 17:35:18 +02:00
pcmcia
perf ARM: 2021-05-01 10:14:08 -07:00
phy phy: Sparx5 Eth SerDes: check return value after calling platform_get_resource() 2021-06-03 11:18:19 +05:30
pinctrl pinctrl: stm32: fix the reported number of GPIO lines per bank 2021-06-18 14:56:54 +02:00
platform platform/mellanox: mlxreg-hotplug: Revert "move to use request_irq by IRQF_NO_AUTOEN flag" 2021-06-04 22:03:13 +02:00
pnp
power power supply and reset changes for the v5.13 series 2021-04-28 15:43:58 -07:00
powercap
pps TTY/Serial driver updates for 5.13-rc1 2021-04-26 11:20:10 -07:00
ps3
ptp ptp: improve max_adj check against unreasonable values 2021-06-15 10:59:46 -07:00
pwm pwm: Changes for v5.13-rc1 2021-05-05 12:53:16 -07:00
rapidio rapidio: handle create_workqueue() failure 2021-05-13 18:32:19 +02:00
ras
regulator regulator: Fixes for v5.14 2021-06-08 09:41:16 -07:00
remoteproc remoteproc updates for v5.13 2021-05-04 11:13:33 -07:00
reset pci-v5.13-changes 2021-05-05 13:24:11 -07:00
rpmsg
rtc RTC for 5.13 2021-05-03 12:15:21 -07:00
s390 s390/vfio-ap: clean up mdev resources when remove callback invoked 2021-06-21 11:19:18 +02:00
sbus
scsi SCSI fixes on 20210625 2021-06-25 15:59:14 -07:00
sh The usual updates from the irq departement: 2021-04-26 09:43:16 -07:00
siox
slimbus
soc soc: amlogic: meson-clk-measure: remove redundant dev_err call in meson_msr_probe() 2021-05-31 09:26:58 +02:00
soundwire soundwire: qcom: fix handling of qcom,ports-block-pack-mode 2021-05-13 11:14:13 +05:30
spi spi: spi-nxp-fspi: move the register operation after the clock enable 2021-06-14 15:02:01 +01:00
spmi
ssb
staging Networking fixes for 5.13-rc7, including fixes from wireless, bpf, 2021-06-18 18:55:29 -07:00
target scsi: target: core: Fix warning on realtime kernels 2021-05-31 22:59:13 -04:00
tc
tee OP-TEE use export_uuid() to copy UUID 2021-06-05 15:43:11 -07:00
thermal - Fix out-of-spec hardware (1st gen Hygon) which does not implement 2021-06-06 12:25:43 -07:00
thunderbolt thunderbolt: usb4: Fix NVM read buffer bounds and offset issue 2021-05-20 11:52:58 +03:00
tty serial: 8250_exar: Avoid NULL pointer dereference at ->exit() 2021-06-09 14:40:48 +02:00
uio uio_hv_generic: Fix another memory leak in error handling paths 2021-05-14 13:26:04 +02:00
usb usb: core: hub: Disable autosuspend for Cypress CY7C65632 2021-06-17 15:34:21 +02:00
vdpa {net,vdpa}/mlx5: Configure interface MAC into mpfs L2 table 2021-05-18 23:01:48 -07:00
vfio vfio: use vma_lookup() instead of find_vma_intersection() 2021-06-29 10:53:51 -07:00
vhost virtio,vhost,vdpa: features, fixes 2021-05-05 13:31:39 -07:00
video Revert "fb_defio: Remove custom address_space_operations" 2021-06-01 17:38:40 +02:00
virt nitro_enclaves: Fix stale file descriptors on failed usercopy 2021-04-29 19:06:49 +02:00
virtio virtio-mem: use page_offline_(start|end) when setting PageOffline() 2021-06-30 20:47:28 -07:00
visorbus
vlynq
vme
w1 w1: ds28e17: Use module_w1_family to simplify the code 2021-04-10 10:58:21 +02:00
watchdog - Core Frameworks 2021-04-28 15:59:13 -07:00
xen xen/events: reset active flag for lateeoi events later 2021-06-24 12:52:36 +02:00
zorro
Kconfig staging: comedi: move out of staging directory 2021-04-15 09:26:25 +02:00
Makefile virtio,vhost,vdpa: features, fixes 2021-05-05 13:31:39 -07:00