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Filename Latest commit message Latest commit date
Chris Wilson 167bc759e8 drm/i915: Restrict PSMI context load w/a to Haswell GT1
After we found a workaround for a hang on context load, Ben Widawsky
found confirmation that it was for an issue with waking from rc6 and
loading a context image.

The workaround from on high suggests that we should

	I915_WRITE(RING_WAIT_FOR_RC6_EXIT(engine->mmio_base),
		   _MASKED_FIELD(RING_RC6_SEL_WRITE_ADDR_MASK,
				 RING_RC6_SEL_WRITE_ADDR_UPPER_LEFT));

in our rc6 setup for Haswell GT1, but on applying that we find instead
that the machine encounters a GT forcewake error and locks up.

As we are removing HW semaphore usage in the next patch, and the
suggested workaround is no improvement, we need to
decouple the PSMI workaround from HAS_SEMAPHORES to IS_HSW_GT1.

References: 2c55018347 ("drm/i915: Disable PSMI sleep messages on all rings around context switches")
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Mika Kuoppala <mika.kuoppala@linux.intel.com>
Reviewed-by: Mika Kuoppala <mika.kuoppala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20181228140736.32606-1-chris@chris-wilson.co.uk
2018-12-28 14:43:26 +00:00
arch Merge branch 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2018-11-18 10:54:59 -08:00
block SCSI: fix queue cleanup race before queue initialization is done 2018-11-14 08:19:10 -07:00
certs
crypto crypto: user - Zeroize whole structure given to user space 2018-11-09 17:35:43 +08:00
Documentation drm/dsc: Add helpers for DSC picture parameter set infoframes 2018-11-27 18:35:17 -08:00
drivers drm/i915: Restrict PSMI context load w/a to Haswell GT1 2018-12-28 14:43:26 +00:00
firmware
fs sysfs: constify sysfs create/remove files harder 2018-12-03 18:18:19 +02:00
include drm: Fix documentation generation for DP_DPCD_QUIRK_NO_PSR 2018-12-05 17:10:25 -08:00
init memblock: stop using implicit alignment to SMP_CACHE_BYTES 2018-10-31 08:54:16 -07:00
ipc ipc: IPCMNI limit check for semmni 2018-10-31 08:54:14 -07:00
kernel Merge branch 'akpm' (patches from Andrew) 2018-11-18 11:31:26 -08:00
lib lib/ubsan.c: don't mark __ubsan_handle_builtin_unreachable as noreturn 2018-11-18 10:15:10 -08:00
LICENSES
mm Merge drm/drm-next into drm-intel-next-queued 2018-11-20 13:14:08 +02:00
net NFS client bugfixes for Linux 4.20 2018-11-15 10:59:37 -06:00
samples VFIO updates for v4.20 2018-10-31 11:01:38 -07:00
scripts scripts/spdxcheck.py: make python3 compliant 2018-11-18 10:15:10 -08:00
security selinux/stable-4.20 PR 20181115 2018-11-15 11:26:09 -06:00
sound Merge drm/drm-next into drm-intel-next-queued 2018-11-20 13:14:08 +02:00
tools libnvdimm 4.20-rc3 2018-11-18 12:21:09 -08:00
usr
virt
.clang-format
.cocciconfig
.get_maintainer.ignore
.gitattributes
.gitignore
.mailmap mailmap: Update email for Punit Agrawal 2018-11-05 10:02:11 +00:00
COPYING
CREDITS MAINTAINERS: update OMAP MMC entry 2018-11-18 10:15:09 -08:00
Kbuild
Kconfig
MAINTAINERS drm-misc-next for v4.21, part 1: 2018-11-19 10:40:33 +10:00
Makefile Linux 4.20-rc3 2018-11-18 13:33:44 -08:00
README

Linux kernel
============

There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.

In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``.  The formatted documentation can also be read online at:

    https://www.kernel.org/doc/html/latest/

There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.

Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.