AuxXxilium/linux_dsm_epyc7002
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7b1366b48c
linux_dsm_epyc7002/drivers
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Chris Wilson 7b1366b48c drm/i915: Reacquire priolist cache after dropping the engine lock 
If we drop the engine lock, we may run execlists_dequeue which may free
the priolist. Therefore if we ever drop the execution lock on the
engine, we have to discard our cache and refetch the priolist to ensure
we do not use a stale pointer.

[  506.418935] [IGT] gem_exec_whisper: starting subtest contexts-priority
[  593.240825] general protection fault: 0000 [#1] SMP
[  593.240863] CPU: 1 PID: 494 Comm: gem_exec_whispe Tainted: G     U            5.0.0-rc6+ #100
[  593.240879] Hardware name:  /NUC6CAYB, BIOS AYAPLCEL.86A.0029.2016.1124.1625 11/24/2016
[  593.240965] RIP: 0010:__i915_schedule+0x1fe/0x320 [i915]
[  593.240981] Code: 48 8b 0c 24 48 89 c3 49 8b 45 28 49 8b 75 20 4c 89 3c 24 48 89 46 08 48 89 30 48 8b 43 08 48 89 4b 08 49 89 5d 20 49 89 45 28 <48> 89 08 45 39 a7 b8 03 00 00 7d 44 45 89 a7 b8 03 00 00 49 8b 85
[  593.240999] RSP: 0018:ffffc90000057a60 EFLAGS: 00010046
[  593.241013] RAX: 6b6b6b6b6b6b6b6b RBX: ffff8882582d7870 RCX: ffff88826baba6f0
[  593.241026] RDX: 0000000000000000 RSI: ffff8882582d6e70 RDI: ffff888273482194
[  593.241049] RBP: ffffc90000057a68 R08: ffff8882582d7680 R09: ffff8882582d7840
[  593.241068] R10: 0000000000000000 R11: ffffea00095ebe08 R12: 0000000000000728
[  593.241105] R13: ffff88826baba6d0 R14: ffffc90000057a40 R15: ffff888273482158
[  593.241120] FS:  00007f4613fb3900(0000) GS:ffff888277a80000(0000) knlGS:0000000000000000
[  593.241133] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  593.241146] CR2: 00007f57d3c66a84 CR3: 000000026e2b6000 CR4: 00000000001406e0
[  593.241158] Call Trace:
[  593.241233]  i915_schedule+0x1f/0x30 [i915]
[  593.241326]  i915_request_add+0x1a9/0x290 [i915]
[  593.241393]  i915_gem_do_execbuffer+0x45f/0x1150 [i915]
[  593.241411]  ? init_object+0x49/0x80
[  593.241425]  ? ___slab_alloc.constprop.91+0x4b8/0x4e0
[  593.241491]  ? i915_gem_execbuffer2_ioctl+0x99/0x380 [i915]
[  593.241563]  ? i915_gem_execbuffer_ioctl+0x270/0x270 [i915]
[  593.241629]  i915_gem_execbuffer2_ioctl+0x1bb/0x380 [i915]
[  593.241705]  ? i915_gem_execbuffer_ioctl+0x270/0x270 [i915]
[  593.241724]  drm_ioctl_kernel+0x81/0xd0
[  593.241738]  drm_ioctl+0x1a7/0x310
[  593.241803]  ? i915_gem_execbuffer_ioctl+0x270/0x270 [i915]
[  593.241819]  ? __update_load_avg_se+0x1c9/0x240
[  593.241834]  ? pick_next_entity+0x7e/0x120
[  593.241851]  do_vfs_ioctl+0x88/0x5d0
[  593.241880]  ksys_ioctl+0x35/0x70
[  593.241894]  __x64_sys_ioctl+0x11/0x20
[  593.241907]  do_syscall_64+0x44/0xf0
[  593.241924]  entry_SYSCALL_64_after_hwframe+0x44/0xa9
[  593.241940] RIP: 0033:0x7f4615ffe757
[  593.241952] Code: 00 00 90 48 8b 05 39 a7 0c 00 64 c7 00 26 00 00 00 48 c7 c0 ff ff ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 b8 10 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 8b 0d 09 a7 0c 00 f7 d8 64 89 01 48
[  593.241970] RSP: 002b:00007ffc1030ddf8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
[  593.241984] RAX: ffffffffffffffda RBX: 00007ffc10324420 RCX: 00007f4615ffe757
[  593.241997] RDX: 00007ffc1030e220 RSI: 0000000040406469 RDI: 0000000000000003
[  593.242010] RBP: 00007ffc1030e220 R08: 00007f46160c9208 R09: 00007f46160c9240
[  593.242022] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000040406469
[  593.242038] R13: 0000000000000003 R14: 0000000000000000 R15: 0000000000000000
[  593.242058] Modules linked in: i915 intel_gtt drm_kms_helper prime_numbers

v2: Track the local engine cache and explicitly clear it when switching
engine locks.

Fixes: a02eb975be ("drm/i915/execlists: Cache the priolist when rescheduling")
Testcase: igt/gem_exec_whisper/contexts-priority # rare!
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
Cc: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Cc: Michał Winiarski <michal.winiarski@intel.com>
Reviewed-by: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20190211204647.26723-1-chris@chris-wilson.co.uk
(cherry picked from commit ed7dc67774)
Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
2019-03-08 09:52:36 -08:00
..
accessibility
acpi ACPI / PMIC: Add generic intel_soc_pmic_exec_mipi_pmic_seq_element handling 2019-01-09 10:35:03 +01:00
amba
android binder: implement binderfs 2018-12-19 09:40:13 +01:00
ata for-4.21/libata-20190102 2019-01-02 18:47:56 -08:00
atm
auxdisplay auxdisplay: charlcd: fix x/y command parsing 2018-12-21 21:27:21 +01:00
base Merge branch 'mount.part1' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs 2019-01-05 13:25:58 -08:00
bcma
block block: sunvdc: don't run hw queue synchronously from irq context 2019-01-03 08:21:47 -07:00
bluetooth Bluetooth: hci_bcm: Handle specific unknown packets after firmware loading 2018-12-19 13:43:42 +01:00
bus ARM: SoC driver updates 2018-12-31 17:32:35 -08:00
cdrom gdrom: fix a memory leak bug 2018-12-29 08:20:44 -07:00
char Remove 'type' argument from access_ok() function 2019-01-03 18:57:57 -08:00
clk Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input 2019-01-02 18:56:59 -08:00
clocksource arch/csky patches for 4.21-rc1 2019-01-05 09:50:07 -08:00
connector
cpufreq powerpc updates for 4.21 2018-12-27 10:43:24 -08:00
cpuidle powerpc updates for 4.21 2018-12-27 10:43:24 -08:00
crypto Remove 'type' argument from access_ok() function 2019-01-03 18:57:57 -08:00
dax mm, devm_memremap_pages: fix shutdown handling 2018-12-28 12:11:47 -08:00
dca
devfreq
dio
dma Merge branch 'next/drivers' into next/late 2019-01-04 14:31:38 -08:00
dma-buf drm-misc-next for 5.1: 2019-01-10 05:58:52 +10:00
edac EDAC, fsl_ddr: Add LS1021A to the list of supported hardware 2018-12-19 11:57:45 +01:00
eisa
extcon
firewire FireWire (IEEE 1394) subsystem patch: 2019-01-05 18:33:21 -08:00
firmware arm64 fixes for -rc1 2019-01-05 11:28:39 -08:00
fmc
fpga Remove 'type' argument from access_ok() function 2019-01-03 18:57:57 -08:00
fsi
gnss
gpio This is the bulk of GPIO changes for the v4.21 kernel series: 2018-12-28 20:00:21 -08:00
gpu drm/i915: Reacquire priolist cache after dropping the engine lock 2019-03-08 09:52:36 -08:00
hid Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/hid/hid 2019-01-05 17:53:40 -08:00
hsi
hv Char/Misc driver patches for 4.21-rc1 2018-12-28 20:54:57 -08:00
hwmon Kconfig updates for v4.21 2018-12-29 13:03:29 -08:00
hwspinlock hwspinlock: fix return value check in stm32_hwspinlock_probe() 2019-01-03 11:42:10 -08:00
hwtracing intel_th: msu: Fix an off-by-one in attribute store 2018-12-19 20:21:06 +01:00
i2c Merge branch 'i2c/for-5.0' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux 2019-01-05 18:13:35 -08:00
i3c
ide for-4.21/block-20181221 2018-12-28 13:19:59 -08:00
idle
iio Staging/IIO driver patches for 4.21-rc1 2018-12-28 20:39:58 -08:00
infiniband 4.21 merge window 2nd pull request 2019-01-05 18:20:51 -08:00
input Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input 2019-01-02 18:56:59 -08:00
iommu IOMMU Updates for Linux v4.21 2019-01-01 15:55:29 -08:00
ipack
irqchip Xtensa updates for v4.21: 2018-12-29 09:40:40 -08:00
isdn isdn: fix kernel-infoleak in capi_unlocked_ioctl 2019-01-02 10:31:39 -08:00
leds LEDs for 4.21-rc1 2018-12-25 14:52:50 -08:00
lightnvm lightnvm: pblk: fix use-after-free bug 2018-12-22 14:45:35 -07:00
macintosh Remove 'type' argument from access_ok() function 2019-01-03 18:57:57 -08:00
mailbox mailbox: tegra-hsp: Use device-managed registration API 2018-12-21 22:31:26 -06:00
mcb
md Merge branch 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/shli/md into for-linus 2019-01-03 08:21:02 -07:00
media Remove 'type' argument from access_ok() function 2019-01-03 18:57:57 -08:00
memory ARM: SoC: late updates 2019-01-05 11:30:37 -08:00
memstick MMC core: 2018-12-28 16:52:18 -08:00
message scsi: flip the default on use_clustering 2018-12-18 23:13:12 -05:00
mfd
misc Merge branch 'i2c/for-5.0' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux 2019-01-05 18:13:35 -08:00
mmc MMC core: 2018-12-28 16:52:18 -08:00
mtd Kbuild updates for v4.21 2018-12-29 12:03:17 -08:00
mux
net Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2019-01-03 12:53:47 -08:00
nfc
ntb
nubus
nvdimm Merge branch 'akpm' (patches from Andrew) 2018-12-28 16:55:46 -08:00
nvme nvme-pci: trace SQ status on completions 2018-12-19 08:35:36 +01:00
nvmem
of Merge tag 'devicetree-for-4.21' of git://git.kernel.org/pub/scm/linux/kernel/git/robh/linux 2018-12-28 20:08:34 -08:00
opp Merge branch 'opp/genpd/propagation' into opp/linux-next 2018-12-14 16:28:52 +05:30
oprofile
parisc Kconfig file consolidation for v4.21 2018-12-29 13:40:29 -08:00
parport
pci pci-v4.21-changes 2019-01-05 17:57:34 -08:00
pcmcia Included in this update: 2019-01-05 11:23:17 -08:00
perf drivers/perf: hisi: Fixup one DDRC PMU register offset 2019-01-04 10:13:27 +00:00
phy phy: Move Allwinner A31 D-PHY driver to drivers/phy/ 2019-02-07 09:34:49 +01:00
pinctrl Pin control bulk changes for the v4.21 kernel cycle: 2019-01-01 13:19:16 -08:00
platform chrome platform changes for v4.21 2019-01-06 11:40:06 -08:00
pnp Remove 'type' argument from access_ok() function 2019-01-03 18:57:57 -08:00
power power supply and reset changes for the v4.21 series 2018-12-28 20:22:45 -08:00
powercap
pps Kconfig updates for v4.21 2018-12-29 13:03:29 -08:00
ps3
ptp Char/Misc driver patches for 4.21-rc1 2018-12-28 20:54:57 -08:00
pwm pwm: imx: Add ipg clock operation 2018-12-24 12:06:56 +01:00
rapidio
ras treewide: surround Kconfig file paths with double quotes 2018-12-22 00:25:54 +09:00
regulator Merge remote-tracking branch 'regulator/topic/coupled' into regulator-next 2018-12-21 13:43:35 +00:00
remoteproc
reset
rpmsg
rtc RTC for 4.21 2019-01-01 13:24:31 -08:00
s390 s390 updates for the 4.21 merge window 2019-01-02 18:37:01 -08:00
sbus Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc-next 2018-12-26 10:32:18 -08:00
scsi Remove 'type' argument from access_ok() function 2019-01-03 18:57:57 -08:00
sfi
sh
siox
slimbus
sn
soc ARM: SoC driver updates 2018-12-31 17:32:35 -08:00
soundwire
spi spi: Updates for v4.21 2018-12-25 14:43:54 -08:00
spmi
ssb
staging staging/vboxvideo: prepare for drmP.h removal from drm_modeset_helper.h 2019-02-07 21:47:29 +01:00
target SCSI misc on 20181224 2018-12-28 14:48:06 -08:00
tc
tee OP-TEE dynamic shm log message 2018-12-31 13:06:30 -08:00
thermal Merge branch 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/rzhang/linux 2019-01-05 16:07:28 -08:00
thunderbolt
tty ARM: SoC: late updates 2019-01-05 11:30:37 -08:00
uio Char/Misc driver patches for 4.21-rc1 2018-12-28 20:54:57 -08:00
usb pci-v4.21-changes 2019-01-05 17:57:34 -08:00
uwb
vfio IOMMU Updates for Linux v4.21 2019-01-01 15:55:29 -08:00
vhost Remove 'type' argument from access_ok() function 2019-01-03 18:57:57 -08:00
video fbdev changes for v4.21: 2019-01-05 18:15:37 -08:00
virt
virtio virtio, vhost: features, fixes, cleanups 2019-01-02 18:54:45 -08:00
visorbus
vlynq
vme
w1 treewide: surround Kconfig file paths with double quotes 2018-12-22 00:25:54 +09:00
watchdog linux-watchdog 4.21-rc1 tag 2019-01-01 13:16:45 -08:00
xen Remove 'type' argument from access_ok() function 2019-01-03 18:57:57 -08:00
zorro
Kconfig Kconfig file consolidation for v4.21 2018-12-29 13:40:29 -08:00
Makefile