AuxXxilium/linux_dsm_epyc7002
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96606f3beb
linux_dsm_epyc7002/drivers
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Oscar Mateo 96606f3beb drm/i915/icl: Deal with GT INT DW correctly 
BSpec says:

"Second level interrupt events are stored in the GT INT DW. GT INT DW is
a double buffered structure. A snapshot of events is taken when SW reads
GT INT DW. From the time of read to the time of SW completely clearing
GT INT DW (to indicate end of service), all incoming interrupts are logged
in a secondary storage structure. this guarantees that the record of
interrupts SW is servicing will not change while under service".

We read GT INT DW in several places now:

- The IRQ handler (banks 0 and 1) where, hopefully, it is completely
  cleared (operation now covered with the irq lock).
- The 'reset' interrupts functions for RPS and GuC logs, where we clear
  the bit we are interested in and leave the others for the normal
  interrupt handler.
- The 'enable' interrupts functions for RPS and GuC logs, as a measure
  of precaution. Here we could relax a bit and don't check GT INT DW
  at all or, if we do, at least we should clear the offending bit
  (which is what this patch does).

Note that, if every bit is cleared on reading GT INT DW, the register
won't be locked. Also note that, according to the BSpec, GT INT DW
cannot be cleared without first servicing the Selector & Shared IIR
registers.

v2:
  - Remove some code duplication (Tvrtko)
  - Make sure GT_INTR_DW are protected by the irq spinlock, since it's a
    global resource (Tvrtko)

v3: Optimize the spinlock (Tvrtko)

v4: Rebase.
v5:
  - take spinlock on outer scope to please sparse (Mika)
  - use raw_reg accessors (Mika)
v6: omit the continue in looping banks (Michel)

Cc: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Cc: Daniele Ceraolo Spurio <daniele.ceraolospurio@intel.com>
Cc: Sagar Arun Kamble <sagar.a.kamble@intel.com>
Signed-off-by: Oscar Mateo <oscar.mateo@intel.com>
Reviewed-by: Tvrtko Ursulin <tvrtko.ursulin@intel.com> (v4)
Signed-off-by: Mika Kuoppala <mika.kuoppala@linux.intel.com>
Reviewed-by: Michel Thierry <michel.thierry@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20180406093237.14548-1-mika.kuoppala@linux.intel.com
2018-04-06 15:33:25 +03:00
..
accessibility
acpi Merge branch 'libnvdimm-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/nvdimm/nvdimm 2018-03-22 18:37:49 -07:00
amba
android ANDROID: binder: synchronize_rcu() when using POLLFREE. 2018-02-16 11:16:38 +01:00
ata libata: Modify quirks for MX100 to limit NCQ_TRIM quirk to MU01 version 2018-03-19 08:36:38 -07:00
atm atm: he: use 64-bit arithmetic instead of 32-bit 2018-02-08 15:05:16 -05:00
auxdisplay auxdisplay: img-ascii-lcd: Silence 2 uninitialized warnings 2018-03-13 18:16:38 +01:00
base ACPI updates for v4.16-rc2 2018-02-15 14:50:32 -08:00
bcma Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2018-01-19 22:59:33 -05:00
block loop: Fix lost writes caused by missing flag 2018-03-09 08:36:36 -07:00
bluetooth Bluetooth: hci_bcm: Set pulsed_host_wake flag in sleep parameters 2018-03-15 19:39:37 +01:00
bus bus: ti-sysc: Fix checking of no-reset-on-init quirk 2018-02-15 09:18:55 -08:00
cdrom
char tpm: fix potential buffer overruns caused by bit glitches on the bus 2018-02-26 15:43:46 -08:00
clk clk: bcm2835: Protect sections updating shared registers 2018-03-19 09:27:37 -07:00
clocksource clocksource/atmel-st: Add 'depends on HAS_IOMEM' to fix unmet dependency 2018-03-09 11:11:58 +01:00
connector
cpufreq Merge branch 'cpufreq-scpi' 2018-03-02 10:44:44 +01:00
cpuidle powerpc updates for 4.16 2018-02-02 10:01:04 -08:00
crypto s390: 2018-02-26 09:28:35 -08:00
dax dax: ->direct_access does not sleep anymore 2018-02-26 12:32:29 -08:00
dca
devfreq PM / devfreq: Fix potential NULL pointer dereference in governor_store 2018-01-02 09:36:54 +09:00
dio
dma dmaengine: stm32-dmamux: fix a potential buffer overflow 2018-03-22 10:51:35 +05:30
dma-buf dma-buf/sw_sync: Fix kerneldoc warnings 2018-02-19 10:50:49 +01:00
edac EDAC, sb_edac: Fix out of bound writes during DIMM configuration on KNL 2018-02-23 12:05:37 +01:00
eisa EISA: Delete error message for a failed memory allocation in eisa_probe() 2018-01-23 09:04:10 +01:00
extcon extcon: int3496: process id-pin first so that we start with the right status 2018-02-14 06:37:33 +09:00
firewire vfs: do bulk POLL* -> EPOLL* replacement 2018-02-11 14:34:03 -08:00
firmware Merge branch 'efi-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2018-03-18 11:56:53 -07:00
fmc
fpga
fsi
gpio gpio: rcar: Use wakeup_path i.s.o. explicit clock handling 2018-03-05 09:01:21 +01:00
gpu drm/i915/icl: Deal with GT INT DW correctly 2018-04-06 15:33:25 +03:00
hid usb: ldusb: add PIDs for new CASSY devices supported by this driver 2018-02-15 18:44:03 +01:00
hsi vfs: do bulk POLL* -> EPOLL* replacement 2018-02-11 14:34:03 -08:00
hv Drivers: hv: vmbus: Fix ring buffer signaling 2018-03-06 09:52:59 -08:00
hwmon Fix bad temperature display on Ryzen/Threadripper 2018-02-15 14:31:28 -08:00
hwspinlock
hwtracing Char/Misc driver patches for 4.16-rc1 2018-02-01 10:31:17 -08:00
i2c i2c: octeon: Prevent error message on bus error 2018-03-02 11:11:15 +01:00
ide genhd: Rename get_disk() to get_disk_and_module() 2018-02-26 09:48:42 -07:00
idle
iio iio: st_pressure: st_accel: pass correct platform data to init 2018-03-10 16:28:05 +00:00
infiniband Fourth pull request for 4.16-rc 2018-03-20 17:39:07 -07:00
input Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input 2018-03-07 17:37:32 -08:00
iommu treewide/trivial: Remove ';;$' typo noise 2018-02-22 10:59:33 +01:00
ipack
irqchip irqchip/irq-imx-gpcv2: Remove unused function 2018-03-11 13:27:12 +00:00
isdn vfs: do bulk POLL* -> EPOLL* replacement 2018-02-11 14:34:03 -08:00
leds vfs: do bulk POLL* -> EPOLL* replacement 2018-02-11 14:34:03 -08:00
lightnvm lightnvm: pblk: refactor pblk_ppa_comp function 2018-01-05 08:50:12 -07:00
macintosh powerpc/macio: set a proper dma_coherent_mask 2018-02-13 08:58:53 -08:00
mailbox vfs: do bulk POLL* -> EPOLL* replacement 2018-02-11 14:34:03 -08:00
mcb
md dm mpath: fix passing integrity data 2018-03-14 15:39:33 -04:00
media media: dvb: fix a Kconfig typo 2018-03-05 07:57:41 -05:00
memory memory: brcmstb: dpfe: support new way of passing data from the DCPU 2018-02-23 10:56:59 -08:00
memstick
message scsi: mptfusion: Add bounds check in mptctl_hp_targetinfo() 2018-01-30 21:32:06 -05:00
mfd vfs: do bulk POLL* -> EPOLL* replacement 2018-02-11 14:34:03 -08:00
misc powerpc fixes for 4.16 #5 2018-03-09 09:33:48 -08:00
mmc mmc: sdhci-acpi: Fix IRQ 0 2018-03-21 11:10:20 +01:00
mtd mtd: nand: fsl_ifc: Read ECCSTAT0 and ECCSTAT1 registers for IFC 2.0 2018-03-21 10:22:28 +01:00
mux Char/Misc driver patches for 4.16-rc1 2018-02-01 10:31:17 -08:00
net Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2018-03-22 14:10:29 -07:00
nfc
ntb NTB: ntb_perf: fix cast to restricted __le32 2018-01-28 22:17:24 -05:00
nubus nubus: Add support for the driver model 2018-01-16 16:47:29 +01:00
nvdimm libnvdimm, nfit: fix persistence domain reporting 2018-03-21 15:12:07 -07:00
nvme nvme_fc: rework sqsize handling 2018-03-08 10:39:58 -07:00
nvmem Merge 4.15-rc6 into char-misc-next 2018-01-02 14:46:35 +01:00
of Linux 4.16-rc7 2018-03-28 14:30:41 +10:00
opp opp: cpu: Replace GFP_ATOMIC with GFP_KERNEL in dev_pm_opp_init_cpufreq_table 2018-02-12 15:07:46 +05:30
oprofile
parisc parisc: Show unhashed EISA EEPROM address 2018-01-02 21:01:02 +01:00
parport
pci Linux 4.16-rc7 2018-03-28 14:30:41 +10:00
pcmcia Merge branch 'pcmcia' of git://git.kernel.org/pub/scm/linux/kernel/git/brodo/pcmcia 2018-02-08 11:48:49 -08:00
perf arm_pmu: Use disable_irq_nosync when disabling SPI in CPU teardown hook 2018-02-28 14:59:47 +00:00
phy phy: qcom-ufs: add MODULE_LICENSE tag 2018-03-12 15:11:59 +05:30
pinctrl pinctrl: samsung: Validate alias coming from DT 2018-03-08 13:02:26 +01:00
platform platform-drivers-x86 for v4.16-7 2018-03-14 13:01:14 -07:00
pnp
power power supply and reset changes for the v4.16 series 2018-01-31 12:55:31 -08:00
powercap powercap: intel_rapl: Fix trailing semicolon 2018-01-17 12:56:24 +01:00
pps vfs: do bulk POLL* -> EPOLL* replacement 2018-02-11 14:34:03 -08:00
ps3
ptp vfs: do bulk POLL* -> EPOLL* replacement 2018-02-11 14:34:03 -08:00
pwm
rapidio vfs: do bulk POLL* -> EPOLL* replacement 2018-02-11 14:34:03 -08:00
ras mm/memory_failure: Remove unused trapno from memory_failure 2018-01-23 12:17:42 -06:00
regulator Merge remote-tracking branches 'regulator/fix/resume' and 'regulator/fix/stm32-vfrefbuf' into regulator-linus 2018-03-07 14:39:07 +00:00
remoteproc remoteproc updates for v4.16 2018-02-05 10:07:40 -08:00
reset
rpmsg vfs: do bulk POLL* -> EPOLL* replacement 2018-02-11 14:34:03 -08:00
rtc vfs: do bulk POLL* -> EPOLL* replacement 2018-02-11 14:34:03 -08:00
s390 Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2018-03-22 14:10:29 -07:00
sbus pci-v4.16-changes 2018-02-06 09:59:40 -08:00
scsi SCSI fixes on 20180320 2018-03-20 16:59:01 -07:00
sfi
sh cpufreq: Add and use cpufreq_for_each_{valid_,}entry_idx() 2018-02-08 10:21:39 +01:00
siox
slimbus slimbus: qcom: add HAS_IOMEM dependency 2018-01-09 17:01:15 +01:00
sn
soc soc/fsl/qbman: fix issue in qman_delete_cgr_safe() 2018-03-14 13:16:23 -04:00
soundwire soundwire: Fix a signedness bug 2018-01-22 16:45:26 +01:00
spi Merge remote-tracking branch 'spi/topic/xilinx' into spi-next 2018-01-26 17:57:34 +00:00
spmi
ssb Merge git://git.kernel.org/pub/scm/linux/kernel/git/kvalo/wireless-drivers.git 2018-02-01 10:37:39 +02:00
staging Linux 4.16-rc7 2018-03-28 14:30:41 +10:00
target Merge branch 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/nab/target-pending 2018-02-09 14:49:46 -08:00
tc
tee This pull request updates the previous tee-drv-dynamic-shm-for-v4.16 pull 2018-01-11 18:05:06 -08:00
thermal Merge branch 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/rzhang/linux 2018-02-06 15:04:58 -08:00
thunderbolt
tty tty: vt: fix up tabstops properly 2018-03-25 07:04:00 -10:00
uio vfs: do bulk POLL* -> EPOLL* replacement 2018-02-11 14:34:03 -08:00
usb usb: musb: Fix external abort in musb_remove on omap2430 2018-03-13 16:36:59 +01:00
uwb uwb: Replace mac address parsing 2018-01-09 16:15:20 +01:00
vfio Revert: "vfio-pci: Mask INTx if a device is not capabable of enabling it" 2018-03-21 22:50:19 -06:00
vhost vhost_net: examine pointer types during un-producing 2018-03-09 12:02:59 -05:00
video Linux 4.16-rc7 2018-03-28 14:30:41 +10:00
virt vfs: do bulk POLL* -> EPOLL* replacement 2018-02-11 14:34:03 -08:00
virtio virtio_ring: fix num_free handling in error case 2018-03-01 18:53:38 +02:00
visorbus
vlynq
vme
w1 Documentation updates for 4.16. New stuff includes refcount_t 2018-01-31 19:25:25 -08:00
watchdog ACPI / watchdog: Fix off-by-one error at resource assignment 2018-03-19 23:17:07 +01:00
xen xen: fix for V4.16-rc5 2018-03-09 16:54:18 -08:00
zorro
Kconfig Char/Misc driver patches for 4.16-rc1 2018-02-01 10:31:17 -08:00
Makefile pci-v4.16-changes 2018-02-06 09:59:40 -08:00