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Robin Murphy 22deed5dea perf/arm-cmn: Refactor node ID handling. Again. 
[ Upstream commit e79634b53e ]

The scope of the "extra device ports" configuration is not made clear by
the CMN documentation - so far we've assumed it applies globally, based
on the sole example which suggests as much. However it transpires that
this is incorrect, and the format does in fact vary based on each
individual XP's port configuration. As a consequence, we're currenly
liable to decode the port/device indices from a node ID incorrectly,
thus program the wrong event source in the DTM leading to bogus event
counts, and also show device topology on the wrong ports in debugfs.

To put this right, rework node IDs yet again to carry around the
additional data necessary to decode them properly per-XP. At this point
the notion of fully decomposing an ID becomes more impractical than it's
worth, so unabstracting the XY mesh coordinates (where 2/3 users were
just debug anyway) ends up leaving things a bit simpler overall.

Fixes: 60d1504070 ("perf/arm-cmn: Support new IP features")
Acked-by: Mark Rutland <mark.rutland@arm.com>
Signed-off-by: Robin Murphy <robin.murphy@arm.com>
Link: https://lore.kernel.org/r/5195f990152fc37adba5fbf5929a6b11063d9f09.1725296395.git.robin.murphy@arm.com
Signed-off-by: Will Deacon <will@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
History 2024-10-17 15:20:40 +02:00
arch RISC-V: KVM: Fix sbiret init before forwarding to userspace 2024-10-17 15:20:37 +02:00
block block: Fix where bio IO priority gets set 2024-09-30 16:23:50 +02:00
certs certs: Fix build error when PKCS#11 URI contains semicolon 2023-02-09 11:28:11 +01:00
crypto crypto: xor - fix template benchmarking 2024-10-17 15:20:36 +02:00
Documentation hwspinlock: Introduce hwspin_lock_bust() 2024-09-08 07:53:09 +02:00
drivers perf/arm-cmn: Refactor node ID handling. Again. 2024-10-17 15:20:40 +02:00
fs mount: handle OOM on mnt_warn_timestamp_expiry 2024-10-17 15:20:37 +02:00
include ACPI: CPPC: Fix MASK_VAL() usage 2024-10-17 15:20:39 +02:00
init rust: fix the default format for CONFIG_{RUSTC,BINDGEN}_VERSION_TEXT 2024-08-29 17:30:32 +02:00
io_uring io_uring/sqpoll: Do not set PF_NO_SETAFFINITY on sqpoll threads 2024-09-12 11:10:26 +02:00
ipc sysctl: treewide: drop unused argument ctl_table_root::set_ownership(table) 2024-08-11 12:35:51 +02:00
kernel padata: Honor the caller's alignment in case of chunk_size 0 2024-10-17 15:20:38 +02:00
lib lib/generic-radix-tree.c: Fix rare race in __genradix_ptr_alloc() 2024-09-12 11:10:25 +02:00
LICENSES LICENSES/LGPL-2.1: Add LGPL-2.1-or-later as valid identifiers 2021-12-16 14:33:10 +01:00
mm mm: avoid leaving partial pfn mappings around in error case 2024-09-18 19:23:04 +02:00
net netfilter: nf_tables: remove annotation to access set timeout while holding lock 2024-10-17 15:20:39 +02:00
rust rust: kbuild: fix export of bss symbols 2024-09-12 11:10:21 +02:00
samples bpf: Replace bpf_lpm_trie_key 0-length array with flexible array 2024-08-29 17:30:22 +02:00
scripts scripts: kconfig: merge_config: config files: add a trailing newline 2024-09-18 19:23:03 +02:00
security smack: unix sockets: fix accept()ed socket label 2024-09-12 11:10:19 +02:00
sound ASoC: tda7419: fix module autoloading 2024-09-30 16:23:49 +02:00
tools kselftest/arm64: Actually test SME vector length changes via sigreturn 2024-10-17 15:20:39 +02:00
usr usr/gen_init_cpio.c: remove unnecessary -1 values from int file 2022-10-03 14:21:44 -07:00
virt KVM: Fix a data race on last_boosted_vcpu in kvm_vcpu_on_spin() 2024-06-27 13:46:21 +02:00
.clang-format inet: ping: use hlist_nulls rcu iterator during lookup 2022-12-01 12:42:46 +01:00
.cocciconfig scripts: add Linux .cocciconfig for coccinelle 2016-07-22 12:13:39 +02:00
.get_maintainer.ignore get_maintainer: add Alan to .get_maintainer.ignore 2022-08-20 15:17:44 -07:00
.gitattributes .gitattributes: use 'dts' diff driver for dts files 2019-12-04 19:44:11 -08:00
.gitignore Kbuild: add Rust support 2022-09-28 09:02:20 +02:00
.mailmap 9 hotfixes. 6 for MM, 3 for other areas. Four of these patches address 2022-12-10 17:10:52 -08:00
.rustfmt.toml rust: add .rustfmt.toml 2022-09-28 09:02:20 +02:00
COPYING COPYING: state that all contributions really are covered by this file 2020-02-10 13:32:20 -08:00
CREDITS MAINTAINERS: Remove Michal Marek from Kbuild maintainers 2022-11-16 14:53:00 +09:00
Kbuild Kbuild updates for v6.1 2022-10-10 12:00:45 -07:00
Kconfig kbuild: ensure full rebuild when the compiler is updated 2020-05-12 13:28:33 +09:00
MAINTAINERS MAINTAINERS: add leah to 6.1 MAINTAINERS file 2024-05-17 11:56:16 +02:00
Makefile Linux 6.1.112 2024-09-30 16:23:56 +02:00
README Drop all 00-INDEX files from Documentation/ 2018-09-09 15:08:58 -06:00

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.