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Robin Murphy 36197835e8 perf/arm-cmn: Fix DTC reset
[ Upstream commit 71746c995c ]

It turns out that my naive DTC reset logic fails to work as intended,
since, after checking with the hardware designers, the PMU actually
needs to be fully enabled in order to correctly clear any pending
overflows. Therefore, invert the sequence to start with turning on both
enables so that we can reliably get the DTCs into a known state, then
moving to our normal counters-stopped state from there. Since all the
DTM counters have already been unpaired during the initial discovery
pass, we just need to additionally reset the cycle counters to ensure
that no other unexpected overflows occur during this period.

Fixes: 0ba64770a2 ("perf: Add Arm CMN-600 PMU driver")
Reported-by: Geoff Blake <blakgeof@amazon.com>
Signed-off-by: Robin Murphy <robin.murphy@arm.com>
Link: https://lore.kernel.org/r/0ea4559261ea394f827c9aee5168c77a60aaee03.1684946389.git.robin.murphy@arm.com
Signed-off-by: Will Deacon <will@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
2023-08-20 15:24:16 +08:00
arch x86/resctrl: Only show tasks' pid in current pid namespace 2023-08-20 15:24:15 +08:00
block blk-iocost: use spin_lock_irqsave in adjust_inuse_and_calc_cost 2023-08-20 15:24:15 +08:00
certs certs/blacklist_hashes.c: fix const confusion in certs blacklist 2023-04-19 17:50:34 +08:00
crypto KEYS: asymmetric: Copy sig and digest in public_key_verify_signature() 2023-08-20 15:21:12 +08:00
Documentation Remove DECnet support from kernel 2023-08-20 15:23:42 +08:00
drivers perf/arm-cmn: Fix DTC reset 2023-08-20 15:24:16 +08:00
fs nilfs2: prevent general protection fault in nilfs_clear_dirty_page() 2023-08-20 15:24:00 +08:00
include tracing/timer: Add missing hrtimer modes to decode_hrtimer_mode(). 2023-08-20 15:24:16 +08:00
init kbuild: Add CONFIG_PAHOLE_VERSION 2023-04-19 17:59:33 +08:00
io_uring io_uring/net: disable partial retries for recvmsg with cmsg 2023-08-20 15:23:59 +08:00
ipc ipc/sem: Fix dangling sem_array access in semtimedop race 2023-04-19 17:56:54 +08:00
kernel posix-timers: Prevent RT livelock in itimer_delete() 2023-08-20 15:24:16 +08:00
lib test_firmware: fix a memory leak with reqs buffer 2023-08-20 15:21:36 +08:00
LICENSES LICENSES/dual/CC-BY-4.0: Git rid of "smart quotes" 2021-07-15 06:31:24 -06:00
mm mm, hwpoison: when copy-on-write hits poison, take page offline 2023-08-20 15:24:10 +08:00
net svcrdma: Prevent page release when nothing was received 2023-08-20 15:24:16 +08:00
samples samples/bpf: Fix fout leak in hbm's run_bpf_prog 2023-06-06 18:39:30 +08:00
scripts scripts/tags.sh: Resolve gtags empty index generation 2023-08-20 15:24:11 +08:00
security selinux: don't use make's grouped targets feature yet 2023-08-20 15:21:11 +08:00
sound ASoC: nau8824: Add quirk to active-high jack-detect 2023-08-20 15:24:05 +08:00
tools perf symbols: Symbol lookup with kcore can fail if multiple segments match stext 2023-08-20 15:24:11 +08:00
usr usr/include/Makefile: add linux/nfc.h to the compile-test coverage 2023-04-19 17:44:58 +08:00
virt KVM: Avoid illegal stage2 mapping on invalid memory slot 2023-08-20 15:23:58 +08:00
.clang-format clang-format: Update with the latest for_each macro list 2021-05-12 23:32:39 +02:00
.cocciconfig
.get_maintainer.ignore
.gitattributes
.gitignore .gitignore: ignore only top-level modules.builtin 2021-05-02 00:43:35 +09:00
.mailmap mailmap: add Andrej Shadura 2021-10-18 20:22:03 -10:00
COPYING COPYING: state that all contributions really are covered by this file 2020-02-10 13:32:20 -08:00
CREDITS MAINTAINERS: Move Daniel Drake to credits 2021-09-21 08:34:58 +03:00
Kbuild kbuild: rename hostprogs-y/always to hostprogs/always-y 2020-02-04 01:53:07 +09:00
Kconfig kbuild: ensure full rebuild when the compiler is updated 2020-05-12 13:28:33 +09:00
MAINTAINERS Remove DECnet support from kernel 2023-08-20 15:23:42 +08:00
Makefile Linux 5.15.120 2023-08-20 15:24:11 +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.