summaryrefslogtreecommitdiff
AgeCommit message (Collapse)Author
2025-10-06scsi: storvsc: Prefer returning channel with the same CPU as on the I/O ↵Long Li
issuing CPU When selecting an outgoing channel for I/O, storvsc tries to select a channel with a returning CPU that is not the same as issuing CPU. This worked well in the past, however it doesn't work well when the Hyper-V exposes a large number of channels (up to the number of all CPUs). Use a different CPU for returning channel is not efficient on Hyper-V. Change this behavior by preferring to the channel with the same CPU as the current I/O issuing CPU whenever possible. Tests have shown improvements in newer Hyper-V/Azure environment, and no regression with older Hyper-V/Azure environments. Tested-by: Raheel Abdul Faizy <rabdulfaizy@microsoft.com> Signed-off-by: Long Li <longli@microsoft.com> Message-Id: <1759381530-7414-1-git-send-email-longli@linux.microsoft.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2025-10-07Merge tag 'drm-xe-next-fixes-2025-10-03' of ↵Dave Airlie
https://gitlab.freedesktop.org/drm/xe/kernel into drm-next Cross-subsystem Changes: - Fix userptr to not allow device private pages with SVM (Thomas Hellström) Driver Changes: - Fix build with clang 16 (Michal Wajdeczko) - Fix handling of invalid configfs syntax usage and spell out the expected syntax in the documentation (Lucas De Marchi) - Do not try late bind firmware when running as VF since it shouldn't handle firmware loading (Michal Wajdeczko) - Fix idle assertion for local BOs (Thomas Hellström) - Fix uninitialized variable for late binding (Colin Ian King, Mallesh Koujalagi) - Do not require perfmon_capable to expose free memory at page granularity. Handle it like other drm drivers do (Matthew Auld) - Fix lock handling on suspend error path (Shuicheng Lin) - Fix I2C controller resume after S3 (Raag Jadav) Signed-off-by: Dave Airlie <airlied@redhat.com> From: Lucas De Marchi <lucas.demarchi@intel.com> Link: https://lore.kernel.org/r/q6yeyb7n2eqo5megxjqayooajirx5hhsntfo65m3y4myscz7oz@25qbabbbr4hj
2025-10-07Merge tag 'drm-misc-next-fixes-2025-10-02' of ↵Dave Airlie
https://gitlab.freedesktop.org/drm/misc/kernel into drm-next Short summary of fixes pull: v3d: - Fix fence locking Signed-off-by: Dave Airlie <airlied@redhat.com> From: Thomas Zimmermann <tzimmermann@suse.de> Link: https://lore.kernel.org/r/20251002122303.GA21323@linux.fritz.box
2025-10-06mailbox: add MediaTek GPUEB IPI mailboxNicolas Frattaroli
The MT8196 SoC uses an embedded MCU to control frequencies and power of the GPU. This controller is referred to as "GPUEB". It communicates to the application processor, among other ways, through a mailbox. The mailbox exposes one interrupt, which appears to only be fired when a response is received, rather than a transaction is completed. For us, this means we unfortunately need to poll for txdone. The mailbox also requires the EB clock to be on when touching any of the mailbox registers. Add a simple driver for it based on the common mailbox framework. Reviewed-by: Chia-I Wu <olvaffe@gmail.com> Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com> Signed-off-by: Nicolas Frattaroli <nicolas.frattaroli@collabora.com> Signed-off-by: Jassi Brar <jassisinghbrar@gmail.com>
2025-10-06dt-bindings: mailbox: Add MT8196 GPUEB MailboxNicolas Frattaroli
The MediaTek MT8196 SoC includes an embedded MCU referred to as "GPUEB", acting as glue logic to control power and frequency of the Mali GPU. This MCU runs special-purpose firmware for this use, and the main application processor communicates with it through a mailbox. Add a binding that describes this mailbox. Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com> Acked-by: Conor Dooley <conor.dooley@microchip.com> Reviewed-by: Rob Herring (Arm) <robh@kernel.org> Signed-off-by: Nicolas Frattaroli <nicolas.frattaroli@collabora.com> Signed-off-by: Jassi Brar <jassisinghbrar@gmail.com>
2025-10-06mailbox: zynqmp-ipi: Fix SGI cleanup on unbindHarini T
The driver incorrectly determines SGI vs SPI interrupts by checking IRQ number < 16, which fails with dynamic IRQ allocation. During unbind, this causes improper SGI cleanup leading to kernel crash. Add explicit irq_type field to pdata for reliable identification of SGI interrupts (type-2) and only clean up SGI resources when appropriate. Fixes: 6ffb1635341b ("mailbox: zynqmp: handle SGI for shared IPI") Signed-off-by: Harini T <harini.t@amd.com> Reviewed-by: Peng Fan <peng.fan@nxp.com> Signed-off-by: Jassi Brar <jassisinghbrar@gmail.com>
2025-10-06mailbox: zynqmp-ipi: Fix out-of-bounds access in mailbox cleanup loopHarini T
The cleanup loop was starting at the wrong array index, causing out-of-bounds access. Start the loop at the correct index for zero-indexed arrays to prevent accessing memory beyond the allocated array bounds. Fixes: 4981b82ba2ff ("mailbox: ZynqMP IPI mailbox controller") Signed-off-by: Harini T <harini.t@amd.com> Reviewed-by: Peng Fan <peng.fan@nxp.com> Signed-off-by: Jassi Brar <jassisinghbrar@gmail.com>
2025-10-06mailbox: zynqmp-ipi: Remove dev.parent check in zynqmp_ipi_free_mboxesHarini T
The ipi_mbox->dev.parent check is unreliable proxy for registration status as it fails to protect against probe failures that occur after the parent is assigned but before device_register() completes. device_is_registered() is the canonical and robust method to verify the registration status. Remove ipi_mbox->dev.parent check in zynqmp_ipi_free_mboxes(). Fixes: 4981b82ba2ff ("mailbox: ZynqMP IPI mailbox controller") Signed-off-by: Harini T <harini.t@amd.com> Reviewed-by: Peng Fan <peng.fan@nxp.com> Signed-off-by: Jassi Brar <jassisinghbrar@gmail.com>
2025-10-06mailbox: zynqmp-ipi: Remove redundant mbox_controller_unregister() callHarini T
The controller is registered using the device-managed function 'devm_mbox_controller_register()'. As documented in mailbox.c, this ensures the devres framework automatically calls mbox_controller_unregister() when device_unregister() is invoked, making the explicit call unnecessary. Remove redundant mbox_controller_unregister() call as device_unregister() handles controller cleanup. Fixes: 4981b82ba2ff ("mailbox: ZynqMP IPI mailbox controller") Signed-off-by: Harini T <harini.t@amd.com> Reviewed-by: Peng Fan <peng.fan@nxp.com> Signed-off-by: Jassi Brar <jassisinghbrar@gmail.com>
2025-10-06mailbox: remove unneeded 'fast_io' parameter in regmap_configWolfram Sang
When using MMIO with regmap, fast_io is implied. No need to set it again. Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com> Signed-off-by: Jassi Brar <jassisinghbrar@gmail.com>
2025-10-06dt-bindings: mailbox: mediatek,gce-mailbox: Make clock-names optionalAngeloGioacchino Del Regno
The GCE Mailbox needs only one clock and the clock-names can be used only by the driver (which, for instance, does not use it), and this is true for all of the currently supported MediaTek SoCs. Stop requiring to specify clock-names on all non-MT8195 GCEs. Signed-off-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com> Reviewed-by: Chen-Yu Tsai <wenst@chromium.org> Acked-by: Rob Herring (Arm) <robh@kernel.org> Reviewed-by: Matthias Brugger <matthias.bgg@gmail.com> Signed-off-by: Jassi Brar <jassisinghbrar@gmail.com>
2025-10-06dt-bindings: mailbox: qcom: Document Glymur CPUCP mailbox controller bindingSibi Sankar
Document CPU Control Processor (CPUCP) mailbox controller for Qualcomm Glymur SoCs. It is software compatible with X1E80100 CPUCP mailbox controller hence fallback to it. Signed-off-by: Sibi Sankar <sibi.sankar@oss.qualcomm.com> Acked-by: Rob Herring (Arm) <robh@kernel.org> Signed-off-by: Jassi Brar <jassisinghbrar@gmail.com>
2025-10-06MAINTAINERS: Change mailbox-altera maintainerAng Tien Sung
Update the mailbox-alters maintainer from <mun.yew.tham@intel.com> to <tiensung.ang@altera.com> as Tham mun yew is no longer with Altera. Signed-off-by: Ang Tien Sung <tiensung.ang@altera.com> Acked-by: Mun Yew Tham <mun.yew.tham@intel.com> Signed-off-by: Jassi Brar <jassisinghbrar@gmail.com>
2025-10-06mailbox: arm_mhuv3: Remove no_free_ptr() to maintain the original form of ↵Liao Yuanhong
the pointer Remove no_free_ptr() to ensure PTR_ERR() consistently retrieves the correct error code. Signed-off-by: Liao Yuanhong <liaoyuanhong@vivo.com> Acked-by: Cristian Marussi <cristian.marussi@arm.com> Signed-off-by: Jassi Brar <jassisinghbrar@gmail.com>
2025-10-06smb: client: Use common code in cifs_lookup()Markus Elfring
Use three additional labels so that another bit of common code can be better reused at the end of this function implementation. Signed-off-by: Markus Elfring <elfring@users.sourceforge.net> Signed-off-by: Steve French <stfrench@microsoft.com>
2025-10-06smb: client: Reduce the scopes for a few variables in two functionsMarkus Elfring
* cifs_lookup(): Move the definition for the local variable “cfid” into an else branch so that the corresponding setting will only be performed if a NULL inode was detected during lookup by this function. * cifs_d_revalidate(): Move the definition for the local variables “inode” and “rc” into an if branch so that the corresponding setting will only be performed after a d_really_is_positive() call. Move the definition for the local variable “cfid” into an else branch so that the corresponding setting will only be performed if further data processing will be needed for an open_cached_dir_by_dentry() call. Signed-off-by: Markus Elfring <elfring@users.sourceforge.net> Acked-by: Henrique Carvalho <henrique.carvalho@suse.com> Signed-off-by: Steve French <stfrench@microsoft.com>
2025-10-06Merge tag 'for-6.18-tag' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/kdave/linux Pull btrfs fixes from David Sterba: "Two short fixes that would be good to have before rc1" * tag 'for-6.18-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/kdave/linux: btrfs: fix PAGE_SIZE format specifier in open_ctree() btrfs: avoid potential out-of-bounds in btrfs_encode_fh()
2025-10-06accel/qaic: Replace snprintf() with sysfs_emit() in sysfs show functionsChelsy Ratnawat
Documentation/filesystems/sysfs.rst mentions that show() should only use sysfs_emit() or sysfs_emit_at() when formatting the value to be returned to user space. So replace snprintf() with sysfs_emit(). Signed-off-by: Chelsy Ratnawat <chelsyratnawat2001@gmail.com> Reviewed-by: Jeff Hugo <jeff.hugo@oss.qualcomm.com> [jhugo: Fix commit text typos] Signed-off-by: Jeff Hugo <jeff.hugo@oss.qualcomm.com> Link: https://lore.kernel.org/r/20250822112804.1726592-1-chelsyratnawat2001@gmail.com
2025-10-06Merge tag 'nfsd-6.18' of git://git.kernel.org/pub/scm/linux/kernel/git/cel/linuxLinus Torvalds
Pull nfsd updates from Chuck Lever: "Mike Snitzer has prototyped a mechanism for disabling I/O caching in NFSD. This is introduced in v6.18 as an experimental feature. This enables scaling NFSD in /both/ directions: - NFS service can be supported on systems with small memory footprints, such as low-cost cloud instances - Large NFS workloads will be less likely to force the eviction of server-local activity, helping it avoid thrashing Jeff Layton contributed a number of fixes to the new attribute delegation implementation (based on a pending Internet RFC) that we hope will make attribute delegation reliable enough to enable by default, as it is on the Linux NFS client. The remaining patches in this pull request are clean-ups and minor optimizations. Many thanks to the contributors, reviewers, testers, and bug reporters who participated during the v6.18 NFSD development cycle" * tag 'nfsd-6.18' of git://git.kernel.org/pub/scm/linux/kernel/git/cel/linux: (42 commits) nfsd: discard nfserr_dropit SUNRPC: Make RPCSEC_GSS_KRB5 select CRYPTO instead of depending on it NFSD: Add io_cache_{read,write} controls to debugfs NFSD: Do the grace period check in ->proc_layoutget nfsd: delete unnecessary NULL check in __fh_verify() NFSD: Allow layoutcommit during grace period NFSD: Disallow layoutget during grace period sunrpc: fix "occurence"->"occurrence" nfsd: Don't force CRYPTO_LIB_SHA256 to be built-in nfsd: nfserr_jukebox in nlm_fopen should lead to a retry NFSD: Reduce DRC bucket size NFSD: Delay adding new entries to LRU SUNRPC: Move the svc_rpcb_cleanup() call sites NFS: Remove rpcbind cleanup for NFSv4.0 callback nfsd: unregister with rpcbind when deleting a transport NFSD: Drop redundant conversion to bool sunrpc: eliminate return pointer in svc_tcp_sendmsg() sunrpc: fix pr_notice in svc_tcp_sendto() to show correct length nfsd: decouple the xprtsec policy check from check_nfsd_access() NFSD: Fix destination buffer size in nfsd4_ssc_setup_dul() ...
2025-10-06perf tools: Fix arm64 libjvmti build by generating unistd_64.hVincent Minet
Since commit 22f72088ffe6 ("tools headers: Update the syscall table with the kernel sources") the arm64 syscall header is generated at build time. Later, commit bfb713ea53c7 ("perf tools: Fix arm64 build by generating unistd_64.h") added a dependency to libperf to guarantee that this header was created before building libperf or perf itself. However, libjvmti also requires this header but does not depend on libperf, leading to build failures such as: In file included from /usr/include/sys/syscall.h:24, from /usr/include/syscall.h:1, from jvmti/jvmti_agent.c:36: tools/arch/arm64/include/uapi/asm/unistd.h:2:10: fatal error: asm/unistd_64.h: No such file or directory 2 | #include <asm/unistd_64.h> Fix this by ensuring that libperf is built before libjvmti, so that unistd_64.h is always available. Fixes: 22f72088ffe69a37 ("tools headers: Update the syscall table with the kernel sources") Cc: Namhyung Kim <namhyung@kernel.org> Cc: Vincent Minet <v.minet@criteo.com> Link: https://lore.kernel.org/r/20250922053702.2688374-1-v.minet@criteo.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2025-10-06selftests: net: unify the Makefile formatsJakub Kicinski
We get a significant number of conflicts between net and net-next because of selftests Makefile changes. People tend to append new test cases at the end of the Makefile when there's no clear sort order. Sort all networking selftests Makefiles, use the following format: VAR_NAME := \ entry1 \ entry2 \ entry3 \ # end of VAR_NAME Some Makefiles are already pretty close to this. Acked-by: Antonio Quartulli <antonio@openvpn.net> Acked-by: Matthieu Baerts (NGI0) <matttbe@kernel.org> Acked-by: Allison Henderson <allison.henderson@oracle.com> Reviewed-by: Petr Machata <petrm@nvidia.com> Link: https://patch.msgid.link/20251003210127.1021918-1-kuba@kernel.org Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2025-10-06accel/qaic: Replace kcalloc + copy_from_user with memdup_array_userThorsten Blum
Replace kcalloc() followed by copy_from_user() with memdup_array_user() to improve and simplify both __qaic_execute_bo_ioctl() and qaic_perf_stats_bo_ioctl(). In __qaic_execute_bo_ioctl(), return early if an error occurs and remove the obsolete 'free_exec' label. Since memdup_array_user() already checks for multiplication overflow, remove the manual check in __qaic_execute_bo_ioctl(). Remove any unused local variables accordingly. Since 'ret = copy_from_user()' has been removed, initialize 'ret = 0' to preserve the same return value on success. No functional changes intended. Signed-off-by: Thorsten Blum <thorsten.blum@linux.dev> Reviewed-by: Jeff Hugo <jeff.hugo@oss.qualcomm.com> Signed-off-by: Jeff Hugo <jeff.hugo@oss.qualcomm.com> Link: https://lore.kernel.org/r/20250917124805.90395-4-thorsten.blum@linux.dev
2025-10-06selftests: net: sort configsJakub Kicinski
Sort config files for networking selftests. This should help us avoid merge conflicts between net and net-next. patchwork check will be added to prevent new issues. Acked-by: Phil Sutter <phil@nwl.cc> Acked-by: Matthieu Baerts (NGI0) <matttbe@kernel.org> Acked-by: Florian Westphal <fw@strlen.de> Acked-by: Antonio Quartulli <antonio@openvpn.net> Link: https://patch.msgid.link/20251003205736.1019673-1-kuba@kernel.org Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2025-10-06accel/qaic: Replace kzalloc + copy_from_user with memdup_userThorsten Blum
Replace kzalloc() followed by copy_from_user() with memdup_user() to improve and simplify qaic_attach_slice_bo_ioctl(). No functional changes intended. Signed-off-by: Thorsten Blum <thorsten.blum@linux.dev> Reviewed-by: Karol Wachowski <karol.wachowski@linux.intel.com> Reviewed-by: Jeff Hugo <jeff.hugo@oss.qualcomm.com> Signed-off-by: Jeff Hugo <jeff.hugo@oss.qualcomm.com> Link: https://lore.kernel.org/r/20250917124805.90395-2-thorsten.blum@linux.dev
2025-10-06tcp: take care of zero tp->window_clamp in tcp_set_rcvlowat()Eric Dumazet
Some applications (like selftests/net/tcp_mmap.c) call SO_RCVLOWAT on their listener, before accept(). This has an unfortunate effect on wscale selection in tcp_select_initial_window() during 3WHS. For instance, tcp_mmap was negotiating wscale 4, regardless of tcp_rmem[2] and sysctl_rmem_max. Do not change tp->window_clamp if it is zero or bigger than our computed value. Zero value is special, it allows tcp_select_initial_window() to enable autotuning. Note that SO_RCVLOWAT use on listener is probably not wise, because tp->scaling_ratio has a default value, possibly wrong. Fixes: d1361840f8c5 ("tcp: fix SO_RCVLOWAT and RCVBUF autotuning") Signed-off-by: Eric Dumazet <edumazet@google.com> Reviewed-by: Kuniyuki Iwashima <kuniyu@google.com> Reviewed-by: Neal Cardwell <ncardwell@google.com> Link: https://patch.msgid.link/20251003184119.2526655-1-edumazet@google.com Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2025-10-06perf tests: Don't retest sections in "Object code reading"James Clark
We already only test each kcore map once, but on slow systems (particularly with network filesystems) even the non-kcore maps are slow. The test can test the same objdump output over and over which only wastes time. Generalize the skipping mechanism to track all DSOs and addresses so that each section is only tested once. On a fully loaded ARM Juno (simulating a parallel 'perf test' run) with a network filesystem, the original runtime is: real 1m51.126s user 0m19.445s sys 1m15.431s And the new runtime is: real 0m48.873s user 0m8.031s sys 0m32.353s Committer testing: # perf test "code read" 22: Object code reading : Ok # Reviewed-by: Ian Rogers <irogers@google.com> Signed-off-by: James Clark <james.clark@linaro.org> Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Ingo Molnar <mingo@redhat.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Leo Yan <leo.yan@arm.com> Cc: Mark Rutland <mark.rutland@arm.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2025-10-06perf docs: Document building with ClangLeo Yan
Add example commands for building perf with Clang. Since recent Android NDK releases use Clang as the default compiler, a separate Android specific document is no longer needed; point to the general build documentation instead. Signed-off-by: Leo Yan <leo.yan@arm.com> Reviewed-by: Ian Rogers <irogers@google.com> Link: https://lore.kernel.org/r/20251006-perf_build_android_ndk-v3-9-4305590795b2@arm.com Cc: Palmer Dabbelt <palmer@dabbelt.com> Cc: Albert Ou <aou@eecs.berkeley.edu> Cc: Alexandre Ghiti <alex@ghiti.fr> Cc: Nick Desaulniers <nick.desaulniers+lkml@gmail.com> Cc: Justin Stitt <justinstitt@google.com> Cc: Bill Wendling <morbo@google.com> Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Arnaldo Carvalho de Melo <acme@kernel.org> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Nathan Chancellor <nathan@kernel.org> Cc: James Clark <james.clark@linaro.org> Cc: linux-riscv@lists.infradead.org Cc: llvm@lists.linux.dev Cc: Paul Walmsley <paul.walmsley@sifive.com> Cc: linux-kernel@vger.kernel.org Cc: linux-perf-users@vger.kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2025-10-06perf build: Support build with clangLeo Yan
Add support for building perf with clang. For cross compilation, the Makefile dynamically selects target flag for corresponding arch. This patch has been verified on x86_64 machine with Ubuntu distro, it can build successfully for native target, and for cross building Arm64 and s390. Example: native build on x86_64 / Ubuntu machine: $ HOSTCC=clang CC=clang CXX=clang++ make -C tools/perf Example: cross building s390 target on x86_64 / Ubuntu machine: # Install x390x cross toolchain and headers $ sudo apt-get install gcc-s390x-linux-gnu g++-s390x-linux-gnu \ libc6-dev-s390x-cross linux-libc-dev-s390x-cross # Build with clang $ HOSTCC=clang CC=clang CXX=clang++ \ ARCH=s390 CROSS_COMPILE=s390x-linux-gnu- \ make -C tools/perf NO_LIBELF=1 NO_LIBTRACEEVENT=1 NO_LIBPYTHON=1 Signed-off-by: Leo Yan <leo.yan@arm.com> Reviewed-by: Ian Rogers <irogers@google.com> Link: https://lore.kernel.org/r/20251006-perf_build_android_ndk-v3-8-4305590795b2@arm.com Cc: Palmer Dabbelt <palmer@dabbelt.com> Cc: Albert Ou <aou@eecs.berkeley.edu> Cc: Alexandre Ghiti <alex@ghiti.fr> Cc: Nick Desaulniers <nick.desaulniers+lkml@gmail.com> Cc: Justin Stitt <justinstitt@google.com> Cc: Bill Wendling <morbo@google.com> Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Arnaldo Carvalho de Melo <acme@kernel.org> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Nathan Chancellor <nathan@kernel.org> Cc: James Clark <james.clark@linaro.org> Cc: linux-riscv@lists.infradead.org Cc: llvm@lists.linux.dev Cc: Paul Walmsley <paul.walmsley@sifive.com> Cc: linux-kernel@vger.kernel.org Cc: linux-perf-users@vger.kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2025-10-06perf test coresight: Dismiss clang warning for unroll loop threadLeo Yan
clang-18.1.3 on Ubuntu 24.04.2 reports warning: unroll_loop_thread.c:35:25: warning: value size does not match register size specified by the constraint and modifier [-Wasm-operand-widths] 35 | : /* in */ [in] "r" (in) | ^ unroll_loop_thread.c:39:1: warning: non-void function does not return a value [-Wreturn-type] 39 | } | ^ Use the modifier "w" for 32-bit register access and return NULL at the end of thread function. Signed-off-by: Leo Yan <leo.yan@arm.com> Reviewed-by: Ian Rogers <irogers@google.com> Link: https://lore.kernel.org/r/20251006-perf_build_android_ndk-v3-7-4305590795b2@arm.com Cc: Palmer Dabbelt <palmer@dabbelt.com> Cc: Albert Ou <aou@eecs.berkeley.edu> Cc: Alexandre Ghiti <alex@ghiti.fr> Cc: Nick Desaulniers <nick.desaulniers+lkml@gmail.com> Cc: Justin Stitt <justinstitt@google.com> Cc: Bill Wendling <morbo@google.com> Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Arnaldo Carvalho de Melo <acme@kernel.org> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Nathan Chancellor <nathan@kernel.org> Cc: James Clark <james.clark@linaro.org> Cc: linux-riscv@lists.infradead.org Cc: llvm@lists.linux.dev Cc: Paul Walmsley <paul.walmsley@sifive.com> Cc: linux-kernel@vger.kernel.org Cc: linux-perf-users@vger.kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2025-10-06perf test coresight: Dismiss clang warning for thread loopLeo Yan
clang-18.1.3 on Ubuntu 24.04.2 reports warning: thread_loop.c:41:23: warning: value size does not match register size specified by the constraint and modifier [-Wasm-operand-widths] 41 | : /* in */ [i] "r" (i), [len] "r" (len) | ^ thread_loop.c:37:8: note: use constraint modifier "w" 37 | "add %[i], %[i], #1\n" | ^~~~ | %w[i] thread_loop.c:41:23: warning: value size does not match register size specified by the constraint and modifier [-Wasm-operand-widths] 41 | : /* in */ [i] "r" (i), [len] "r" (len) | ^ thread_loop.c:37:14: note: use constraint modifier "w" 37 | "add %[i], %[i], #1\n" | ^~~~ | %w[i] thread_loop.c:41:23: warning: value size does not match register size specified by the constraint and modifier [-Wasm-operand-widths] 41 | : /* in */ [i] "r" (i), [len] "r" (len) | ^ thread_loop.c:38:8: note: use constraint modifier "w" 38 | "cmp %[i], %[len]\n" | ^~~~ | %w[i] thread_loop.c:41:38: warning: value size does not match register size specified by the constraint and modifier [-Wasm-operand-widths] 41 | : /* in */ [i] "r" (i), [len] "r" (len) | ^ thread_loop.c:38:14: note: use constraint modifier "w" 38 | "cmp %[i], %[len]\n" | ^~~~~~ | %w[len] Use the modifier "w" for 32-bit register access. Signed-off-by: Leo Yan <leo.yan@arm.com> Reviewed-by: Ian Rogers <irogers@google.com> Link: https://lore.kernel.org/r/20251006-perf_build_android_ndk-v3-6-4305590795b2@arm.com Cc: Palmer Dabbelt <palmer@dabbelt.com> Cc: Albert Ou <aou@eecs.berkeley.edu> Cc: Alexandre Ghiti <alex@ghiti.fr> Cc: Nick Desaulniers <nick.desaulniers+lkml@gmail.com> Cc: Justin Stitt <justinstitt@google.com> Cc: Bill Wendling <morbo@google.com> Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Arnaldo Carvalho de Melo <acme@kernel.org> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Nathan Chancellor <nathan@kernel.org> Cc: James Clark <james.clark@linaro.org> Cc: linux-riscv@lists.infradead.org Cc: llvm@lists.linux.dev Cc: Paul Walmsley <paul.walmsley@sifive.com> Cc: linux-kernel@vger.kernel.org Cc: linux-perf-users@vger.kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2025-10-06perf test coresight: Dismiss clang warning for memcpy threadLeo Yan
clang-18.1.3 on Ubuntu 24.04.2 reports warning: memcpy_thread.c:30:1: warning: non-void function does not return a value in all control paths [-Wreturn-type] 30 | } | ^ Dismiss the warning with returning NULL from the thread function. Signed-off-by: Leo Yan <leo.yan@arm.com> Reviewed-by: Ian Rogers <irogers@google.com> Link: https://lore.kernel.org/r/20251006-perf_build_android_ndk-v3-5-4305590795b2@arm.com Cc: Palmer Dabbelt <palmer@dabbelt.com> Cc: Albert Ou <aou@eecs.berkeley.edu> Cc: Alexandre Ghiti <alex@ghiti.fr> Cc: Nick Desaulniers <nick.desaulniers+lkml@gmail.com> Cc: Justin Stitt <justinstitt@google.com> Cc: Bill Wendling <morbo@google.com> Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Arnaldo Carvalho de Melo <acme@kernel.org> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Nathan Chancellor <nathan@kernel.org> Cc: James Clark <james.clark@linaro.org> Cc: linux-riscv@lists.infradead.org Cc: llvm@lists.linux.dev Cc: Paul Walmsley <paul.walmsley@sifive.com> Cc: linux-kernel@vger.kernel.org Cc: linux-perf-users@vger.kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2025-10-06perf build: Disable thread safety analysis for perl headerLeo Yan
When build with perl5, it reports error: In file included from /usr/lib/perl5/5.42.0/x86_64-linux-thread-multi/CORE/perl.h:7933: /usr/lib/perl5/5.42.0/x86_64-linux-thread-multi/CORE/inline.h:298:5: error: mutex 'PL_env_mutex.lock' is not held on every path through here [-Werror,-Wthread-safety-analysis] 298 | ENV_UNLOCK; | ^ /usr/lib/perl5/5.42.0/x86_64-linux-thread-multi/CORE/perl.h:7091:31: note: expanded from macro 'ENV_UNLOCK' 7091 | # define ENV_UNLOCK PERL_REENTRANT_UNLOCK("env"... | ^ /usr/lib/perl5/5.42.0/x86_64-linux-thread-multi/CORE/perl.h:6465:7: note: expanded from macro 'PERL_REENTRANT_UNLOCK' 6465 | } STMT_END | ^ /usr/lib/perl5/5.42.0/x86_64-linux-thread-multi/CORE/perl.h:865:28: note: expanded from macro 'STMT_END' 865 | # define STMT_END while (0) | ^ The error is caused by perl header but not perf code, disable thread safety analysis if including the header. Though GCC does not support the thread safety analysis option, this negative warning flag is silently ignored by it. Signed-off-by: Leo Yan <leo.yan@arm.com> Reviewed-by: Ian Rogers <irogers@google.com> Link: https://lore.kernel.org/r/20251006-perf_build_android_ndk-v3-4-4305590795b2@arm.com Cc: Palmer Dabbelt <palmer@dabbelt.com> Cc: Albert Ou <aou@eecs.berkeley.edu> Cc: Alexandre Ghiti <alex@ghiti.fr> Cc: Nick Desaulniers <nick.desaulniers+lkml@gmail.com> Cc: Justin Stitt <justinstitt@google.com> Cc: Bill Wendling <morbo@google.com> Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Arnaldo Carvalho de Melo <acme@kernel.org> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Nathan Chancellor <nathan@kernel.org> Cc: James Clark <james.clark@linaro.org> Cc: linux-riscv@lists.infradead.org Cc: llvm@lists.linux.dev Cc: Paul Walmsley <paul.walmsley@sifive.com> Cc: linux-kernel@vger.kernel.org Cc: linux-perf-users@vger.kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2025-10-06perf build: Correct CROSS_ARCH for clangLeo Yan
Clang's -dumpmachine outputs "aarch64-unknown-linux-gnu", which does not match the MultiArch convention. This prevents the build system from detecting installed packages. Fix by stripping the trailing '-' from CROSS_COMPILE when setting CROSS_ARCH. Signed-off-by: Leo Yan <leo.yan@arm.com> Reviewed-by: Ian Rogers <irogers@google.com> Link: https://lore.kernel.org/r/20251006-perf_build_android_ndk-v3-3-4305590795b2@arm.com Cc: Palmer Dabbelt <palmer@dabbelt.com> Cc: Albert Ou <aou@eecs.berkeley.edu> Cc: Alexandre Ghiti <alex@ghiti.fr> Cc: Nick Desaulniers <nick.desaulniers+lkml@gmail.com> Cc: Justin Stitt <justinstitt@google.com> Cc: Bill Wendling <morbo@google.com> Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Arnaldo Carvalho de Melo <acme@kernel.org> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Nathan Chancellor <nathan@kernel.org> Cc: James Clark <james.clark@linaro.org> Cc: linux-riscv@lists.infradead.org Cc: llvm@lists.linux.dev Cc: Paul Walmsley <paul.walmsley@sifive.com> Cc: linux-kernel@vger.kernel.org Cc: linux-perf-users@vger.kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2025-10-06perf python: split Clang options when invoking PopenLeo Yan
When passing a list to subprocess.Popen, each element maps to one argv token. Current code bundles multiple Clang flags into a single element, something like: cmd = ['clang', '--target=x86_64-linux-gnu -fintegrated-as -Wno-cast-function-type-mismatch', 'test-hello.c'] So Clang only sees one long, invalid option instead of separate flags, as a result, the script cannot capture any log via PIPE. Fix this by using shlex.split() to separate the string so each option becomes its own argv element. The fixed list will be: cmd = ['clang', '--target=x86_64-linux-gnu', '-fintegrated-as', '-Wno-cast-function-type-mismatch', 'test-hello.c'] Fixes: 09e6f9f98370 ("perf python: Fix splitting CC into compiler and options") Signed-off-by: Leo Yan <leo.yan@arm.com> Reviewed-by: Ian Rogers <irogers@google.com> Link: https://lore.kernel.org/r/20251006-perf_build_android_ndk-v3-2-4305590795b2@arm.com Cc: Palmer Dabbelt <palmer@dabbelt.com> Cc: Albert Ou <aou@eecs.berkeley.edu> Cc: Alexandre Ghiti <alex@ghiti.fr> Cc: Nick Desaulniers <nick.desaulniers+lkml@gmail.com> Cc: Justin Stitt <justinstitt@google.com> Cc: Bill Wendling <morbo@google.com> Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Arnaldo Carvalho de Melo <acme@kernel.org> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Nathan Chancellor <nathan@kernel.org> Cc: James Clark <james.clark@linaro.org> Cc: linux-riscv@lists.infradead.org Cc: llvm@lists.linux.dev Cc: Paul Walmsley <paul.walmsley@sifive.com> Cc: linux-kernel@vger.kernel.org Cc: linux-perf-users@vger.kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2025-10-06tools build: Align warning options with perfLeo Yan
The feature test programs are built without enabling '-Wall -Werror' options. As a result, a feature may appear to be available, but later building in perf can fail with stricter checks. Make the feature test program use the same warning options as perf. Fixes: 1925459b4d92 ("tools build: Fix feature Makefile issues with 'O='") Signed-off-by: Leo Yan <leo.yan@arm.com> Reviewed-by: Ian Rogers <irogers@google.com> Link: https://lore.kernel.org/r/20251006-perf_build_android_ndk-v3-1-4305590795b2@arm.com Cc: Palmer Dabbelt <palmer@dabbelt.com> Cc: Albert Ou <aou@eecs.berkeley.edu> Cc: Alexandre Ghiti <alex@ghiti.fr> Cc: Nick Desaulniers <nick.desaulniers+lkml@gmail.com> Cc: Justin Stitt <justinstitt@google.com> Cc: Bill Wendling <morbo@google.com> Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Arnaldo Carvalho de Melo <acme@kernel.org> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Nathan Chancellor <nathan@kernel.org> Cc: James Clark <james.clark@linaro.org> Cc: linux-riscv@lists.infradead.org Cc: llvm@lists.linux.dev Cc: Paul Walmsley <paul.walmsley@sifive.com> Cc: linux-kernel@vger.kernel.org Cc: linux-perf-users@vger.kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2025-10-06perf disasm: Remove unused evsel from 'struct annotate_args'Ian Rogers
Set in symbol__annotate() but never used. Signed-off-by: Ian Rogers <irogers@google.com> Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Alexandre Ghiti <alexghiti@rivosinc.com> Cc: Andi Kleen <ak@linux.intel.com> Cc: Athira Rajeev <atrajeev@linux.ibm.com> Cc: Bill Wendling <morbo@google.com> Cc: Charlie Jenkins <charlie@rivosinc.com> Cc: Collin Funk <collin.funk1@gmail.com> Cc: Dmitriy Vyukov <dvyukov@google.com> Cc: Dr. David Alan Gilbert <linux@treblig.org> Cc: Eric Biggers <ebiggers@kernel.org> Cc: Haibo Xu <haibo1.xu@intel.com> Cc: Ingo Molnar <mingo@redhat.com> Cc: James Clark <james.clark@linaro.org> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Justin Stitt <justinstitt@google.com> Cc: Li Huafei <lihuafei1@huawei.com> Cc: Masami Hiramatsu <mhiramat@kernel.org> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Nathan Chancellor <nathan@kernel.org> Cc: Nick Desaulniers <nick.desaulniers+lkml@gmail.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Song Liu <song@kernel.org> Cc: Stephen Brennan <stephen.s.brennan@oracle.com> Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2025-10-06perf srcline: Fallback between addr2line implementationsIan Rogers
Factor the addr2line function implementation into separate source files (addr2line.[ch]) and rename the addr2line function cmd__addr2line. In srcline replace the ifdef-ed addr2line implementations with one that first tries the llvm__addr2line implementation, then the deprecated libbfd__addr2line function and on failure uses cmd__addr2line. If HAVE_LIBLLVM_SUPPORT is enabled the llvm__addr2line will execute against the libLLVM.so it is linked against. If HAVE_LIBLLVM_DYNAMIC is enabled then libperf-llvm.so (that links against libLLVM.so) will be dlopened. If the dlopen succeeds then the behavior should match HAVE_LIBLLVM_SUPPORT. On failure cmd__addr2line is used. The dlopen is only tried once. If HAVE_LIBLLVM_DYNAMIC isn't enabled then llvm__addr2line immediately fails and cmd__addr2line is used. Clean up the dso__free_a2l logic, which is only needed in the non-LLVM version and moved to addr2line.c. Signed-off-by: Ian Rogers <irogers@google.com> Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Alexandre Ghiti <alexghiti@rivosinc.com> Cc: Andi Kleen <ak@linux.intel.com> Cc: Athira Rajeev <atrajeev@linux.ibm.com> Cc: Bill Wendling <morbo@google.com> Cc: Charlie Jenkins <charlie@rivosinc.com> Cc: Collin Funk <collin.funk1@gmail.com> Cc: Dmitriy Vyukov <dvyukov@google.com> Cc: Dr. David Alan Gilbert <linux@treblig.org> Cc: Eric Biggers <ebiggers@kernel.org> Cc: Haibo Xu <haibo1.xu@intel.com> Cc: Ingo Molnar <mingo@redhat.com> Cc: James Clark <james.clark@linaro.org> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Justin Stitt <justinstitt@google.com> Cc: Li Huafei <lihuafei1@huawei.com> Cc: Masami Hiramatsu <mhiramat@kernel.org> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Nathan Chancellor <nathan@kernel.org> Cc: Nick Desaulniers <nick.desaulniers+lkml@gmail.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Song Liu <song@kernel.org> Cc: Stephen Brennan <stephen.s.brennan@oracle.com> Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2025-10-06Merge tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvmLinus Torvalds
Pull x86 kvm updates from Paolo Bonzini: "Generic: - Rework almost all of KVM's exports to expose symbols only to KVM's x86 vendor modules (kvm-{amd,intel}.ko and PPC's kvm-{pr,hv}.ko x86: - Rework almost all of KVM x86's exports to expose symbols only to KVM's vendor modules, i.e. to kvm-{amd,intel}.ko - Add support for virtualizing Control-flow Enforcement Technology (CET) on Intel (Shadow Stacks and Indirect Branch Tracking) and AMD (Shadow Stacks). It is worth noting that while SHSTK and IBT can be enabled separately in CPUID, it is not really possible to virtualize them separately. Therefore, Intel processors will really allow both SHSTK and IBT under the hood if either is made visible in the guest's CPUID. The alternative would be to intercept XSAVES/XRSTORS, which is not feasible for performance reasons - Fix a variety of fuzzing WARNs all caused by checking L1 intercepts when completing userspace I/O. KVM has already committed to allowing L2 to to perform I/O at that point - Emulate PERF_CNTR_GLOBAL_STATUS_SET for PerfMonV2 guests, as the MSR is supposed to exist for v2 PMUs - Allow Centaur CPU leaves (base 0xC000_0000) for Zhaoxin CPUs - Add support for the immediate forms of RDMSR and WRMSRNS, sans full emulator support (KVM should never need to emulate the MSRs outside of forced emulation and other contrived testing scenarios) - Clean up the MSR APIs in preparation for CET and FRED virtualization, as well as mediated vPMU support - Clean up a pile of PMU code in anticipation of adding support for mediated vPMUs - Reject in-kernel IOAPIC/PIT for TDX VMs, as KVM can't obtain EOI vmexits needed to faithfully emulate an I/O APIC for such guests - Many cleanups and minor fixes - Recover possible NX huge pages within the TDP MMU under read lock to reduce guest jitter when restoring NX huge pages - Return -EAGAIN during prefault if userspace concurrently deletes/moves the relevant memslot, to fix an issue where prefaulting could deadlock with the memslot update x86 (AMD): - Enable AVIC by default for Zen4+ if x2AVIC (and other prereqs) is supported - Require a minimum GHCB version of 2 when starting SEV-SNP guests via KVM_SEV_INIT2 so that invalid GHCB versions result in immediate errors instead of latent guest failures - Add support for SEV-SNP's CipherText Hiding, an opt-in feature that prevents unauthorized CPU accesses from reading the ciphertext of SNP guest private memory, e.g. to attempt an offline attack. This feature splits the shared SEV-ES/SEV-SNP ASID space into separate ranges for SEV-ES and SEV-SNP guests, therefore a new module parameter is needed to control the number of ASIDs that can be used for VMs with CipherText Hiding vs. how many can be used to run SEV-ES guests - Add support for Secure TSC for SEV-SNP guests, which prevents the untrusted host from tampering with the guest's TSC frequency, while still allowing the the VMM to configure the guest's TSC frequency prior to launch - Validate the XCR0 provided by the guest (via the GHCB) to avoid bugs resulting from bogus XCR0 values - Save an SEV guest's policy if and only if LAUNCH_START fully succeeds to avoid leaving behind stale state (thankfully not consumed in KVM) - Explicitly reject non-positive effective lengths during SNP's LAUNCH_UPDATE instead of subtly relying on guest_memfd to deal with them - Reload the pre-VMRUN TSC_AUX on #VMEXIT for SEV-ES guests, not the host's desired TSC_AUX, to fix a bug where KVM was keeping a different vCPU's TSC_AUX in the host MSR until return to userspace KVM (Intel): - Preparation for FRED support - Don't retry in TDX's anti-zero-step mitigation if the target memslot is invalid, i.e. is being deleted or moved, to fix a deadlock scenario similar to the aforementioned prefaulting case - Misc bugfixes and minor cleanups" * tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm: (142 commits) KVM: x86: Export KVM-internal symbols for sub-modules only KVM: x86: Drop pointless exports of kvm_arch_xxx() hooks KVM: x86: Move kvm_intr_is_single_vcpu() to lapic.c KVM: Export KVM-internal symbols for sub-modules only KVM: s390/vfio-ap: Use kvm_is_gpa_in_memslot() instead of open coded equivalent KVM: VMX: Make CR4.CET a guest owned bit KVM: selftests: Verify MSRs are (not) in save/restore list when (un)supported KVM: selftests: Add coverage for KVM-defined registers in MSRs test KVM: selftests: Add KVM_{G,S}ET_ONE_REG coverage to MSRs test KVM: selftests: Extend MSRs test to validate vCPUs without supported features KVM: selftests: Add support for MSR_IA32_{S,U}_CET to MSRs test KVM: selftests: Add an MSR test to exercise guest/host and read/write KVM: x86: Define AMD's #HV, #VC, and #SX exception vectors KVM: x86: Define Control Protection Exception (#CP) vector KVM: x86: Add human friendly formatting for #XM, and #VE KVM: SVM: Enable shadow stack virtualization for SVM KVM: SEV: Synchronize MSR_IA32_XSS from the GHCB when it's valid KVM: SVM: Pass through shadow stack MSRs as appropriate KVM: SVM: Update dump_vmcb with shadow stack save area additions KVM: nSVM: Save/load CET Shadow Stack state to/from vmcb12/vmcb02 ...
2025-10-06perf disasm: Make ins__scnprintf() and ins__is_nop() staticIan Rogers
Reduce the scope of ins__scnprintf() and ins__is_nop() that aren't used outside of disasm.c. Signed-off-by: Ian Rogers <irogers@google.com> Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Alexandre Ghiti <alexghiti@rivosinc.com> Cc: Andi Kleen <ak@linux.intel.com> Cc: Athira Rajeev <atrajeev@linux.ibm.com> Cc: Bill Wendling <morbo@google.com> Cc: Charlie Jenkins <charlie@rivosinc.com> Cc: Collin Funk <collin.funk1@gmail.com> Cc: Dmitriy Vyukov <dvyukov@google.com> Cc: Dr. David Alan Gilbert <linux@treblig.org> Cc: Eric Biggers <ebiggers@kernel.org> Cc: Haibo Xu <haibo1.xu@intel.com> Cc: Ingo Molnar <mingo@redhat.com> Cc: James Clark <james.clark@linaro.org> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Justin Stitt <justinstitt@google.com> Cc: Li Huafei <lihuafei1@huawei.com> Cc: Masami Hiramatsu <mhiramat@kernel.org> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Nathan Chancellor <nathan@kernel.org> Cc: Nick Desaulniers <nick.desaulniers+lkml@gmail.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Song Liu <song@kernel.org> Cc: Stephen Brennan <stephen.s.brennan@oracle.com> Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2025-10-06perf dso: Clean up read_symbol() error handlingIan Rogers
Ensure errno is set and return to caller for error handling. Unusually for perf the value isn't negated as expected by symbol__strerror_disassemble(). Signed-off-by: Ian Rogers <irogers@google.com> Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Alexandre Ghiti <alexghiti@rivosinc.com> Cc: Andi Kleen <ak@linux.intel.com> Cc: Athira Rajeev <atrajeev@linux.ibm.com> Cc: Bill Wendling <morbo@google.com> Cc: Charlie Jenkins <charlie@rivosinc.com> Cc: Collin Funk <collin.funk1@gmail.com> Cc: Dmitriy Vyukov <dvyukov@google.com> Cc: Dr. David Alan Gilbert <linux@treblig.org> Cc: Eric Biggers <ebiggers@kernel.org> Cc: Haibo Xu <haibo1.xu@intel.com> Cc: Ingo Molnar <mingo@redhat.com> Cc: James Clark <james.clark@linaro.org> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Justin Stitt <justinstitt@google.com> Cc: Li Huafei <lihuafei1@huawei.com> Cc: Masami Hiramatsu <mhiramat@kernel.org> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Nathan Chancellor <nathan@kernel.org> Cc: Nick Desaulniers <nick.desaulniers+lkml@gmail.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Song Liu <song@kernel.org> Cc: Stephen Brennan <stephen.s.brennan@oracle.com> Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2025-10-06perf dso: Support BPF programs in dso__read_symbol()Ian Rogers
Set the buffer to the code in the BPF linear info. This enables BPF JIT code disassembly by LLVM and capstone. Move the common but minimal disassmble_bpf_image call to disassemble_objdump so that it is only called after falling back to the objdump option. Similarly move the disassmble_bpf function to disassemble_objdump and rename to disassmble_bpf_libbfd to make it clearer that this support relies on libbfd. Signed-off-by: Ian Rogers <irogers@google.com> Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Alexandre Ghiti <alexghiti@rivosinc.com> Cc: Andi Kleen <ak@linux.intel.com> Cc: Athira Rajeev <atrajeev@linux.ibm.com> Cc: Bill Wendling <morbo@google.com> Cc: Charlie Jenkins <charlie@rivosinc.com> Cc: Collin Funk <collin.funk1@gmail.com> Cc: Dmitriy Vyukov <dvyukov@google.com> Cc: Dr. David Alan Gilbert <linux@treblig.org> Cc: Eric Biggers <ebiggers@kernel.org> Cc: Haibo Xu <haibo1.xu@intel.com> Cc: Ingo Molnar <mingo@redhat.com> Cc: James Clark <james.clark@linaro.org> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Justin Stitt <justinstitt@google.com> Cc: Li Huafei <lihuafei1@huawei.com> Cc: Masami Hiramatsu <mhiramat@kernel.org> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Nathan Chancellor <nathan@kernel.org> Cc: Nick Desaulniers <nick.desaulniers+lkml@gmail.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Song Liu <song@kernel.org> Cc: Stephen Brennan <stephen.s.brennan@oracle.com> Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2025-10-06perf dso: Move read_symbol() from llvm/capstone to dsoIan Rogers
Move the read_symbol function to dso.h, make the return type const and add a mutable out_buf out parameter. In future changes this will allow a code pointer to be returned without necessary allocating memory. Signed-off-by: Ian Rogers <irogers@google.com> Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Alexandre Ghiti <alexghiti@rivosinc.com> Cc: Andi Kleen <ak@linux.intel.com> Cc: Athira Rajeev <atrajeev@linux.ibm.com> Cc: Bill Wendling <morbo@google.com> Cc: Charlie Jenkins <charlie@rivosinc.com> Cc: Collin Funk <collin.funk1@gmail.com> Cc: Dmitriy Vyukov <dvyukov@google.com> Cc: Dr. David Alan Gilbert <linux@treblig.org> Cc: Eric Biggers <ebiggers@kernel.org> Cc: Haibo Xu <haibo1.xu@intel.com> Cc: Ingo Molnar <mingo@redhat.com> Cc: James Clark <james.clark@linaro.org> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Justin Stitt <justinstitt@google.com> Cc: Li Huafei <lihuafei1@huawei.com> Cc: Masami Hiramatsu <mhiramat@kernel.org> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Nathan Chancellor <nathan@kernel.org> Cc: Nick Desaulniers <nick.desaulniers+lkml@gmail.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Song Liu <song@kernel.org> Cc: Stephen Brennan <stephen.s.brennan@oracle.com> Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2025-10-06perf llvm: Reduce LLVM initializationIan Rogers
Move the 3 LLVM initialization routines to be called in a single init_llvm function that has its own bool to avoid repeated initialization. Reduce the scope of triplet and avoid copying strings for x86. Signed-off-by: Ian Rogers <irogers@google.com> Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Alexandre Ghiti <alexghiti@rivosinc.com> Cc: Andi Kleen <ak@linux.intel.com> Cc: Athira Rajeev <atrajeev@linux.ibm.com> Cc: Bill Wendling <morbo@google.com> Cc: Charlie Jenkins <charlie@rivosinc.com> Cc: Collin Funk <collin.funk1@gmail.com> Cc: Dmitriy Vyukov <dvyukov@google.com> Cc: Dr. David Alan Gilbert <linux@treblig.org> Cc: Eric Biggers <ebiggers@kernel.org> Cc: Haibo Xu <haibo1.xu@intel.com> Cc: Ingo Molnar <mingo@redhat.com> Cc: James Clark <james.clark@linaro.org> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Justin Stitt <justinstitt@google.com> Cc: Li Huafei <lihuafei1@huawei.com> Cc: Masami Hiramatsu <mhiramat@kernel.org> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Nathan Chancellor <nathan@kernel.org> Cc: Nick Desaulniers <nick.desaulniers+lkml@gmail.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Song Liu <song@kernel.org> Cc: Stephen Brennan <stephen.s.brennan@oracle.com> [ Move init_llvm() under HAVE_LIBLLVM_SUPPORT to fix the build ] Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2025-10-06Merge tag 'loongarch-6.18' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/chenhuacai/linux-loongson Pull LoongArch updates from Huacai Chen: - Initialize acpi_gbl_use_global_lock to false - Allow specify SIMD width via kernel parameters - Add kexec_file (both EFI & ELF format) support - Add PER_VMA_LOCK for page fault handling support - Improve BPF trampoline support - Update the default config file - Some bug fixes and other small changes * tag 'loongarch-6.18' of git://git.kernel.org/pub/scm/linux/kernel/git/chenhuacai/linux-loongson: (23 commits) LoongArch: Update Loongson-3 default config file LoongArch: BPF: Sign-extend struct ops return values properly LoongArch: BPF: Make error handling robust in arch_prepare_bpf_trampoline() LoongArch: BPF: Make trampoline size stable LoongArch: BPF: Don't align trampoline size LoongArch: BPF: No support of struct argument in trampoline programs LoongArch: BPF: No text_poke() for kernel text LoongArch: BPF: Remove duplicated bpf_flush_icache() LoongArch: BPF: Remove duplicated flags check LoongArch: BPF: Fix uninitialized symbol 'retval_off' LoongArch: BPF: Optimize sign-extention mov instructions LoongArch: Handle new atomic instructions for probes LoongArch: Try VMA lock-based page fault handling first LoongArch: Automatically disable kaslr if boot from kexec_file LoongArch: Add crash dump support for kexec_file LoongArch: Add ELF binary support for kexec_file LoongArch: Add EFI binary support for kexec_file LoongArch: Add preparatory infrastructure for kexec_file LoongArch: Add struct loongarch_image_header for kernel LoongArch: Allow specify SIMD width via kernel parameters ...
2025-10-06page_pool: Fix PP_MAGIC_MASK to avoid crashing on some 32-bit archesToke Høiland-Jørgensen
Helge reported that the introduction of PP_MAGIC_MASK let to crashes on boot on his 32-bit parisc machine. The cause of this is the mask is set too wide, so the page_pool_page_is_pp() incurs false positives which crashes the machine. Just disabling the check in page_pool_is_pp() will lead to the page_pool code itself malfunctioning; so instead of doing this, this patch changes the define for PP_DMA_INDEX_BITS to avoid mistaking arbitrary kernel pointers for page_pool-tagged pages. The fix relies on the kernel pointers that alias with the pp_magic field always being above PAGE_OFFSET. With this assumption, we can use the lowest bit of the value of PAGE_OFFSET as the upper bound of the PP_DMA_INDEX_MASK, which should avoid the false positives. Because we cannot rely on PAGE_OFFSET always being a compile-time constant, nor on it always being >0, we fall back to disabling the dma_index storage when there are not enough bits available. This leaves us in the situation we were in before the patch in the Fixes tag, but only on a subset of architecture configurations. This seems to be the best we can do until the transition to page types in complete for page_pool pages. v2: - Make sure there's at least 8 bits available and that the PAGE_OFFSET bit calculation doesn't wrap Link: https://lore.kernel.org/all/aMNJMFa5fDalFmtn@p100/ Fixes: ee62ce7a1d90 ("page_pool: Track DMA-mapped pages and unmap them when destroying the pool") Cc: stable@vger.kernel.org # 6.15+ Tested-by: Helge Deller <deller@gmx.de> Signed-off-by: Toke Høiland-Jørgensen <toke@redhat.com> Reviewed-by: Mina Almasry <almasrymina@google.com> Tested-by: Helge Deller <deller@gmx.de> Link: https://patch.msgid.link/20250930114331.675412-1-toke@redhat.com Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2025-10-06Merge tag 'uml-for-linux-6.18-rc1' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/uml/linux Pull uml updates from Johannes Berg: - minor preparations for SMP support - SPARSE_IRQ support for kunit - help output cleanups * tag 'uml-for-linux-6.18-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/uml/linux: um: Remove unused ipi_pipe field from cpuinfo_um um: Remove unused cpu_data and current_cpu_data macros um: Stop tracking virtual CPUs via mm_cpumask() um: Centralize stub size calculations um: Remove outdated comment about STUB_DATA_PAGES um: Remove unused offset and child_err fields from stub_data um: Indent time-travel help messages um: Fix help message for ssl-non-raw um: vector: Fix indentation for help message um: Add missing trailing newline to help messages um: virtio-pci: implement .shutdown() um: Support SPARSE_IRQ
2025-10-06kbuild: uapi: Strip comments before size type checkGeert Uytterhoeven
On m68k, check_sizetypes in headers_check reports: ./usr/include/asm/bootinfo-amiga.h:17: found __[us]{8,16,32,64} type without #include <linux/types.h> This header file does not use any of the Linux-specific integer types, but merely refers to them from comments, so this is a false positive. As of commit c3a9d74ee413bdb3 ("kbuild: uapi: upgrade check_sizetypes() warning to error"), this check was promoted to an error, breaking m68k all{mod,yes}config builds. Fix this by stripping simple comments before looking for Linux-specific integer types. Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org> Reviewed-by: Thomas Weißschuh <thomas.weissschuh@linutronix.de> Link: https://patch.msgid.link/949f096337e28d50510e970ae3ba3ec9c1342ec0.1759753998.git.geert@linux-m68k.org [nathan: Adjust comment and remove unnecessary escaping from slashes in regex] Signed-off-by: Nathan Chancellor <nathan@kernel.org>
2025-10-06perf check: Add libLLVM featureIan Rogers
Advertise when perf is built with the HAVE_LIBLLVM_SUPPORT option. Committer testing: $ perf -vv | grep LLVM libLLVM: [ on ] # HAVE_LIBLLVM_SUPPORT $ And the form to use in scripts, notably the tools/perf/tests/shell/ 'perf test' ones: $ perf check feature libllvm libLLVM: [ on ] # HAVE_LIBLLVM_SUPPORT $ perf check -q feature libllvm && echo LLVM is present LLVM is present $ perf check -q feature liballvm && echo ALLVM is present $ Signed-off-by: Ian Rogers <irogers@google.com> Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Alexandre Ghiti <alexghiti@rivosinc.com> Cc: Andi Kleen <ak@linux.intel.com> Cc: Athira Rajeev <atrajeev@linux.ibm.com> Cc: Bill Wendling <morbo@google.com> Cc: Charlie Jenkins <charlie@rivosinc.com> Cc: Collin Funk <collin.funk1@gmail.com> Cc: Dmitriy Vyukov <dvyukov@google.com> Cc: Dr. David Alan Gilbert <linux@treblig.org> Cc: Eric Biggers <ebiggers@kernel.org> Cc: Haibo Xu <haibo1.xu@intel.com> Cc: Ingo Molnar <mingo@redhat.com> Cc: James Clark <james.clark@linaro.org> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Justin Stitt <justinstitt@google.com> Cc: Li Huafei <lihuafei1@huawei.com> Cc: Masami Hiramatsu <mhiramat@kernel.org> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Nathan Chancellor <nathan@kernel.org> Cc: Nick Desaulniers <nick.desaulniers+lkml@gmail.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Song Liu <song@kernel.org> Cc: Stephen Brennan <stephen.s.brennan@oracle.com> Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2025-10-06net: fsl_pq_mdio: Fix device node reference leak in fsl_pq_mdio_probeErick Karanja
Add missing of_node_put call to release device node tbi obtained via for_each_child_of_node. Fixes: afae5ad78b342 ("net/fsl_pq_mdio: streamline probing of MDIO nodes") Signed-off-by: Erick Karanja <karanja99erick@gmail.com> Link: https://patch.msgid.link/20251002174617.960521-1-karanja99erick@gmail.com Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2025-10-06Merge tag 'libnvdimm-for-6.18' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/nvdimm/nvdimm Pull libnvdimm updates from Ira Weiny: "Primarily bug fixes. Dave introduced the usage of cleanup.h a bit late in the cycle to help with the new label work required within CXL [1] nvdimm: - Return -ENOMEM if devm_kcalloc() fails in ndtest_probe() - Clean up __nd_ioctl() and remove gotos - Remove duplicate linux/slab.h header - Introduce guard() for nvdimm_bus_lock - Use str_plural() to simplify the code ACPI: - NFIT: Fix incorrect ndr_desc being reportedin dev_err message" Link: https://lore.kernel.org/all/20250917134116.1623730-1-s.neeraj@samsung.com/ [1] * tag 'libnvdimm-for-6.18' of git://git.kernel.org/pub/scm/linux/kernel/git/nvdimm/nvdimm: nvdimm: Remove duplicate linux/slab.h header nvdimm: ndtest: Return -ENOMEM if devm_kcalloc() fails in ndtest_probe() nvdimm: Clean up __nd_ioctl() and remove gotos nvdimm: Introduce guard() for nvdimm_bus_lock ACPI: NFIT: Fix incorrect ndr_desc being reportedin dev_err message nvdimm: Use str_plural() to simplify the code
generated by cgit v1.3 (git 2.53.0) at 2026-11-12 07:38:44 +0000