linux_dsm_epyc7002/drivers
Chris Wilson a75d035fed drm/i915: Disable preemption and sleeping while using the punit sideband
While we talk to the punit over its sideband, we need to prevent the cpu
from sleeping in order to prevent a potential machine hang.

Note that by itself, it appears that pm_qos_update_request (via
intel_idle) doesn't provide a sufficient barrier to ensure that all core
are indeed awake (out of Cstate) and that the package is awake. To do so,
we need to supplement the pm_qos with a manual ping on_each_cpu.

v2: Restrict the heavy-weight wakeup to just the ISOF_PORT_PUNIT, there
is insufficient evidence to implicate a wider problem atm. Similarly,
restrict the w/a to Valleyview, as Cherryview doesn't have an angry cadre
of users.

The working theory, courtesy of Ville and Hans, is the issue lies within
the power delivery and so is likely to be unit and board specific and
occurs when both the unit/fw require extra power at the same time as the
cpu package is changing its own power state.

References: https://bugzilla.kernel.org/show_bug.cgi?id=109051
References: https://bugs.freedesktop.org/show_bug.cgi?id=102657
References: https://bugzilla.kernel.org/show_bug.cgi?id=195255
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Mika Kuoppala <mika.kuoppala@linux.intel.com>
Cc: Hans de Goede <hdegoede@redhat.com>
Cc: Ville Syrjälä <ville.syrjala@linux.intel.com>
Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20190426081725.31217-1-chris@chris-wilson.co.uk
2019-04-26 10:20:26 +01:00
..
accessibility
acpi ACPI / utils: Drop reference in test for device presence 2019-03-19 22:34:21 +01:00
amba
android
ata
atm
auxdisplay auxdisplay: charlcd: make backlight initial state configurable 2019-03-17 08:48:45 +01:00
base Device properties framework fix for 5.1-rc2 2019-03-22 12:08:52 -07:00
bcma
block for-linus-20190323 2019-03-23 10:14:42 -07:00
bluetooth
bus
cdrom
char
clk We have a fairly balanced mix of clk driver updates and clk framework 2019-03-14 08:46:17 -07:00
clocksource clocksource/drivers/clps711x: Remove board support 2019-03-24 11:30:11 +01:00
connector
cpufreq cpufreq: intel_pstate: Fix up iowait_boost computation 2019-03-12 09:47:30 +01:00
cpuidle cpuidle: governor: Add new governors to cpuidle_governors again 2019-03-12 23:46:55 +01:00
crypto Merge branch 'linus' of git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6 2019-03-13 09:51:17 -07:00
dax device-dax for 5.1 2019-03-16 13:05:32 -07:00
dca
devfreq
dio
dma dmaengine updates for v5.1-rc1 2019-03-14 09:11:54 -07:00
dma-buf
edac
eisa
extcon
firewire
firmware memblock: drop memblock_alloc_*_nopanic() variants 2019-03-12 10:04:02 -07:00
fmc
fpga
fsi
gnss
gpio
gpu drm/i915: Disable preemption and sleeping while using the punit sideband 2019-04-26 10:20:26 +01:00
hid
hsi
hv
hwmon
hwspinlock
hwtracing ARM updates for 5.1-rc1 2019-03-15 14:37:46 -07:00
i2c i2c: i2c-designware-platdrv: Always use a dynamic adapter number 2019-03-13 18:07:10 +01:00
i3c
ide Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/ide 2019-03-11 09:34:00 -07:00
idle
iio
infiniband i40iw: Avoid panic when handling the inetdev event 2019-03-17 21:40:40 -03:00
input Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input 2019-03-11 10:57:11 -07:00
interconnect
iommu iommu/vt-d: Save the right domain ID used by hardware 2019-03-22 12:02:27 +01:00
ipack
irqchip irqchip/irq-mvebu-sei: Make mvebu_sei_ap806_caps static 2019-03-21 16:43:00 +01:00
isdn isdn: hfcpci: fix potential NULL pointer dereference 2019-03-12 14:36:02 -07:00
leds
lightnvm
macintosh treewide: add checks for the return value of memblock_alloc*() 2019-03-12 10:04:02 -07:00
mailbox mailbox: imx: keep MU irq working during suspend/resume 2019-03-11 02:51:43 -05:00
mcb
md for-5.1/block-post-20190315 2019-03-16 12:36:39 -07:00
media media: vsp1: drm: Implement writeback support 2019-03-18 17:24:14 +02:00
memory
memstick
message
mfd
misc
mmc mmc: renesas_sdhi: limit block count to 16 bit for old revisions 2019-03-21 11:41:46 +01:00
mtd This pull request contains updates for both UBI and UBIFS: 2019-03-13 09:34:35 -07:00
mux
net IB/mlx5: Use mlx5 core to create/destroy a DEVX DCT 2019-03-17 21:40:39 -03:00
nfc
ntb Fixes for switchtec debugability and mapping table entries, NTB 2019-03-15 14:32:59 -07:00
nubus
nvdimm device-dax for 5.1 2019-03-16 13:05:32 -07:00
nvme for-5.1/block-post-20190315 2019-03-16 12:36:39 -07:00
nvmem
of of: fix kmemleak crash caused by imbalance in early memory reservation 2019-03-12 10:04:02 -07:00
opp PM / OPP: Update performance state when freq == old_freq 2019-03-12 09:45:56 +01:00
oprofile
parisc
parport
pci
pcmcia
perf
phy
pinctrl This is the bulk of pin control changes for the v5.1 kernel cycle. 2019-03-11 11:12:50 -07:00
platform Chrome Platform fixes for v5.1-rc2 2019-03-19 11:28:15 -07:00
pnp
power
powercap
pps
ps3
ptp
pwm
rapidio
ras
regulator
remoteproc remoteproc updates for v5.1 2019-03-14 09:00:06 -07:00
reset
rpmsg
rtc chrome platform changes for v5.1 2019-03-12 09:46:32 -07:00
s390 ARM: some cleanups, direct physical timer assignment, cache sanitization 2019-03-15 15:00:28 -07:00
sbus
scsi scsi: ibmvscsi: Fix empty event pool access during host removal 2019-03-20 20:13:17 -04:00
sfi
sh
siox
slimbus
sn
soc
soundwire
spi
spmi
ssb
staging drm-misc-next for 5.2: 2019-03-25 11:05:12 +01:00
target SCSI misc on 20190315 2019-03-16 12:51:50 -07:00
tc
tee
thermal Merge branches 'fixes' and 'thermal-intel' into next 2019-03-18 22:37:44 +08:00
thunderbolt
tty dmaengine updates for v5.1-rc1 2019-03-14 09:11:54 -07:00
uio
usb memblock: drop memblock_alloc_*_nopanic() variants 2019-03-12 10:04:02 -07:00
uwb
vfio
vhost
video fbdev changes for v5.1: 2019-03-15 14:22:59 -07:00
virt
virtio
visorbus
vlynq
vme
w1
watchdog linux-watchdog 5.1-rc1 tag 2019-03-11 11:22:15 -07:00
xen xen/balloon: Fix mapping PG_offline pages to user space 2019-03-15 15:35:35 +01:00
zorro
Kconfig
Makefile