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Filename Latest commit message Latest commit date
Mario Limonciello 8d64fd2682 ACPI: processor idle: Fix up C-state latency if not ordered 
[ Upstream commit 65ea8f2c6e230bdf71fed0137cf9e9d1b307db32 ]

Generally, the C-state latency is provided by the _CST method or
FADT, but some OEM platforms using AMD Picasso, Renoir, Van Gogh,
and Cezanne set the C2 latency greater than C3's which causes the
C2 state to be skipped.

That will block the core entering PC6, which prevents S0ix working
properly on Linux systems.

In other operating systems, the latency values are not validated and
this does not cause problems by skipping states.

To avoid this issue on Linux, detect when latencies are not an
arithmetic progression and sort them.

Link: 026d186e45
Link: https://gitlab.freedesktop.org/drm/amd/-/issues/1230#note_712174
Suggested-by: Prike Liang <Prike.Liang@amd.com>
Suggested-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Mario Limonciello <mario.limonciello@amd.com>
[ rjw: Subject and changelog edits ]
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
2021-07-14 16:53:16 +02:00
arch KVM: s390: get rid of register asm usage 2021-07-14 16:53:15 +02:00
block
certs certs: Move load_system_certificate_list to a common function 2021-06-30 08:47:55 -04:00
crypto crypto: shash - avoid comparing pointers to exported functions under CFI 2021-07-14 16:53:13 +02:00
Documentation hwmon: (max31790) Fix pwmX_enable attributes 2021-07-14 16:53:14 +02:00
drivers ACPI: processor idle: Fix up C-state latency if not ordered 2021-07-14 16:53:16 +02:00
fs btrfs: disable build on platforms having page size 256K 2021-07-14 16:53:14 +02:00
include media: Fix Media Controller API config checks 2021-07-14 16:53:15 +02:00
init
ipc
kernel lockding/lockdep: Avoid to find wrong lock dep path in check_irq_usage() 2021-07-14 16:53:15 +02:00
lib seq_buf: Make trace_seq_putmem_hex() support data longer than 8 2021-07-14 16:53:08 +02:00
LICENSES
mm mm, futex: fix shared futex pgoff on shmem huge page 2021-06-30 08:47:55 -04:00
net SUNRPC: Should wake up the privileged task firstly. 2021-07-14 16:53:05 +02:00
samples
scripts Makefile: fix GDB warning with CONFIG_RELR 2021-07-14 16:53:12 +02:00
security evm: Refuse EVM_ALLOW_METADATA_WRITES only if an HMAC key is loaded 2021-07-14 16:53:08 +02:00
sound ALSA: hda/realtek: Apply LED fixup for HP Dragonfly G1, too 2021-07-14 16:52:59 +02:00
tools
usr
virt KVM: do not allow mapping valid but non-reference-counted pages 2021-06-30 08:47:50 -04:00
.clang-format
.cocciconfig
.get_maintainer.ignore
.gitattributes
.gitignore
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COPYING
CREDITS
Kbuild
Kconfig
MAINTAINERS
Makefile Makefile: fix GDB warning with CONFIG_RELR 2021-07-14 16:53:12 +02:00
README

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.