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Kim Phillips ba362da15e perf/amd/uncore: Replace manual sampling check with CAP_NO_INTERRUPT flag 
[ Upstream commit f967140dfb ]

Enable the sampling check in kernel/events/core.c::perf_event_open(),
which returns the more appropriate -EOPNOTSUPP.

BEFORE:

  $ sudo perf record -a -e instructions,l3_request_g1.caching_l3_cache_accesses true
  Error:
  The sys_perf_event_open() syscall returned with 22 (Invalid argument) for event (l3_request_g1.caching_l3_cache_accesses).
  /bin/dmesg | grep -i perf may provide additional information.

With nothing relevant in dmesg.

AFTER:

  $ sudo perf record -a -e instructions,l3_request_g1.caching_l3_cache_accesses true
  Error:
  l3_request_g1.caching_l3_cache_accesses: PMU Hardware doesn't support sampling/overflow-interrupts. Try 'perf stat'

Fixes: c43ca5091a ("perf/x86/amd: Add support for AMD NB and L2I "uncore" counters")
Signed-off-by: Kim Phillips <kim.phillips@amd.com>
Signed-off-by: Borislav Petkov <bp@suse.de>
Acked-by: Peter Zijlstra <peterz@infradead.org>
Cc: stable@vger.kernel.org
Link: https://lkml.kernel.org/r/20200311191323.13124-1-kim.phillips@amd.com
Signed-off-by: Sasha Levin <sashal@kernel.org>
2020-03-20 10:54:23 +01:00
arch perf/amd/uncore: Replace manual sampling check with CAP_NO_INTERRUPT flag 2020-03-20 10:54:23 +01:00
block block: don't use bio->bi_vcnt to figure out segment number 2020-01-27 14:46:19 +01:00
certs Replace magic for trusting the secondary keyring with #define 2018-09-09 19:55:54 +02:00
crypto crypto: api - Fix race condition in crypto_spawn_alg 2020-02-14 16:32:14 -05:00
Documentation cifs_atomic_open(): fix double-put on late allocation failure 2020-03-20 10:54:16 +01:00
drivers efi: Add a sanity check to efivar_store_raw() 2020-03-20 10:54:20 +01:00
firmware Fix built-in early-load Intel microcode alignment 2020-01-23 08:20:30 +01:00
fs gfs2_atomic_open(): fix O_EXCL|O_CREAT handling on cold dcache 2020-03-20 10:54:16 +01:00
include cgroup: Iterate tasks that did not finish do_exit() 2020-03-20 10:54:14 +01:00
init fork: fix some -Wmissing-prototypes warnings 2019-12-05 15:37:52 +01:00
ipc Revert "ipc,sem: remove uneeded sem_undo_list lock usage in exit_sem()" 2020-02-28 16:36:12 +01:00
kernel workqueue: don't use wq_select_unbound_cpu() for bound works 2020-03-20 10:54:16 +01:00
lib lib/stackdepot.c: fix global out-of-bounds in stack_slabs 2020-02-28 16:36:13 +01:00
mm net: memcg: late association of sock to memcg 2020-03-20 10:54:09 +01:00
net batman-adv: Don't schedule OGM for disabled interface 2020-03-20 10:54:23 +01:00
samples samples/bpf: Don't try to remove user's homedir on clean 2020-02-14 16:32:13 -05:00
scripts kconfig: fix broken dependency in randconfig-generated .config 2020-02-28 16:35:59 +01:00
security selinux: ensure we cleanup the internal AVC counters on error in avc_update() 2020-02-28 16:36:09 +01:00
sound ASoC: topology: Fix memleak in soc_tplg_manifest_load() 2020-03-11 18:03:09 +01:00
tools ktest: Add timeout for ssh sync testing 2020-03-20 10:54:16 +01:00
usr kbuild: clean compressed initramfs image 2019-10-07 18:55:14 +02:00
virt KVM: Check for a bad hva before dropping into the ghc slow path 2020-03-11 18:02:53 +01:00
.cocciconfig
.get_maintainer.ignore
.gitattributes .gitattributes: set git diff driver for C source code files 2016-10-07 18:46:30 -07:00
.gitignore kbuild: rpm-pkg: keep spec file until make mrproper 2018-02-13 10:19:46 +01:00
.mailmap .mailmap: Add Maciej W. Rozycki's Imagination e-mail address 2017-11-10 12:16:15 -08:00
COPYING
CREDITS MAINTAINERS: update TPM driver infrastructure changes 2017-11-09 17:58:40 -08:00
Kbuild License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
Kconfig License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
MAINTAINERS MAINTAINERS: Update drm/i915 bug filing URL 2020-02-28 16:36:12 +01:00
Makefile Linux 4.14.173 2020-03-11 18:03:09 +01:00
README README: add a new README file, pointing to the Documentation/ 2016-10-24 08:12:35 -02:00

README 

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

This file was moved to Documentation/admin-guide/README.rst

Please notice that there are several guides for kernel developers and users.
These guides can be rendered in a number of formats, like HTML and PDF.

In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``.

There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.
See Documentation/00-INDEX for a list of what is contained in each file.

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.