linux.git/tools/perf, branch v6.11-rc2

Merge tag 'riscv-for-linus-6.11-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/riscv/linux

2024-08-02T16:33:35+00:00

Pull RISC-V fixes from Palmer Dabbelt:

 - A fix to avoid dropping some of the internal pseudo-extensions, which
   breaks *envcfg dependency parsing

 - The kernel entry address is now aligned in purgatory, which avoids a
   misaligned load that can lead to crash on systems that don't support
   misaligned accesses early in boot

 - The FW_SFENCE_VMA_RECEIVED perf event was duplicated in a handful of
   perf JSON configurations, one of them been updated to
   FW_SFENCE_VMA_ASID_SENT

 - The starfive cache driver is now restricted to 64-bit systems, as it
   isn't 32-bit clean

 - A fix for to avoid aliasing legacy-mode perf counters with software
   perf counters

 - VM_FAULT_SIGSEGV is now handled in the page fault code

 - A fix for stalls during CPU hotplug due to IPIs being disabled

 - A fix for memblock bounds checking. This manifests as a crash on
   systems with discontinuous memory maps that have regions that don't
   fit in the linear map

* tag 'riscv-for-linus-6.11-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/riscv/linux:
  riscv: Fix linear mapping checks for non-contiguous memory regions
  RISC-V: Enable the IPI before workqueue_online_cpu()
  riscv/mm: Add handling for VM_FAULT_SIGSEGV in mm_fault_error()
  perf: riscv: Fix selecting counters in legacy mode
  cache: StarFive: Require a 64-bit system
  perf arch events: Fix duplicate RISC-V SBI firmware event name
  riscv/purgatory: align riscv_kernel_entry
  riscv: cpufeature: Do not drop Linux-internal extensions

perf arch events: Fix duplicate RISC-V SBI firmware event name

2024-08-01T14:14:45+00:00

Currently, the RISC-V firmware JSON file has duplicate event name
"FW_SFENCE_VMA_RECEIVED". According to the RISC-V SBI PMU extension[1],
the event name should be "FW_SFENCE_VMA_ASID_SENT".

Before this patch:
$ perf list

firmware:
  fw_access_load
       [Load access trap event. Unit: cpu]
  fw_access_store
       [Store access trap event. Unit: cpu]
....
 fw_set_timer
       [Set timer event. Unit: cpu]
  fw_sfence_vma_asid_received
       [Received SFENCE.VMA with ASID request from other HART event. Unit: cpu]
  fw_sfence_vma_received
       [Sent SFENCE.VMA with ASID request to other HART event. Unit: cpu]

After this patch:
$ perf list

firmware:
  fw_access_load
       [Load access trap event. Unit: cpu]
  fw_access_store
       [Store access trap event. Unit: cpu]
.....
  fw_set_timer
       [Set timer event. Unit: cpu]
  fw_sfence_vma_asid_received
       [Received SFENCE.VMA with ASID request from other HART event. Unit: cpu]
  fw_sfence_vma_asid_sent
       [Sent SFENCE.VMA with ASID request to other HART event. Unit: cpu]
  fw_sfence_vma_received
       [Received SFENCE.VMA request from other HART event. Unit: cpu]

Link: https://github.com/riscv-non-isa/riscv-sbi-doc/blob/master/src/ext-pmu.adoc#event-firmware-events-type-15 [1]
Fixes: 8f0dcb4e7364 ("perf arch events: riscv sbi firmware std event files")
Fixes: c4f769d4093d ("perf vendor events riscv: add Sifive U74 JSON file")
Fixes: acbf6de674ef ("perf vendor events riscv: Add StarFive Dubhe-80 JSON file")
Fixes: 7340c6df49df ("perf vendor events riscv: add T-HEAD C9xx JSON file")
Fixes: f5102e31c209 ("riscv: andes: Support specifying symbolic firmware and hardware raw event")
Signed-off-by: Eric Lin 
Reviewed-by: Samuel Holland 
Reviewed-by: Nikita Shubin 
Reviewed-by: Inochi Amaoto 
Reviewed-by: Andrew Jones 
Reviewed-by: Atish Patra 
Link: https://lore.kernel.org/r/20240719115018.27356-1-eric.lin@sifive.com
Signed-off-by: Palmer Dabbelt

Merge tag 'perf-tools-fixes-for-v6.11-2024-07-30' of git://git.kernel.org/pub/scm/linux/kernel/git/perf/perf-tools

2024-07-31T02:22:41+00:00

Pull perf tools fixes from Namhyung Kim:
 "Some more build fixes and a random crash fix:

   - Fix cross-build by setting pkg-config env according to the arch

   - Fix static build for missing library dependencies

   - Fix Segfault when callchain has no symbols"

* tag 'perf-tools-fixes-for-v6.11-2024-07-30' of git://git.kernel.org/pub/scm/linux/kernel/git/perf/perf-tools:
  perf docs: Document cross compilation
  perf: build: Link lib 'zstd' for static build
  perf: build: Link lib 'lzma' for static build
  perf: build: Only link libebl.a for old libdw
  perf: build: Set Python configuration for cross compilation
  perf: build: Setup PKG_CONFIG_LIBDIR for cross compilation
  perf tool: fix dereferencing NULL al->maps

perf docs: Document cross compilation

2024-07-26T18:15:55+00:00

Records the commands for cross compilation with two methods.

The first method relies on Multiarch. The second approach is to explicitly
specify the PKG_CONFIG variables, which is widely used in build system
(like Buildroot, Yocto, etc).

Co-developed-by: James Clark 
Signed-off-by: James Clark 
Signed-off-by: Leo Yan 
Tested-by: Ian Rogers 
Cc: amadio@gentoo.org
Cc: Thomas Richter 
Link: https://lore.kernel.org/r/20240717082211.524826-7-leo.yan@arm.com
Signed-off-by: Namhyung Kim

perf: build: Link lib 'zstd' for static build

2024-07-26T18:15:47+00:00

When build static perf, Makefile reports the error:

  Makefile.config:480: No libdw DWARF unwind found, Please install
  elfutils-devel/libdw-dev >= 0.158 and/or set LIBDW_DIR

The libdw has been installed on the system, but the build system fails
to build the feature detecting binary 'test-libdw-dwarf-unwind'. The
failure is caused by missing to link the lib 'zstd'.

Link lib 'zstd' for the static build, in the end, the dwarf feature can
be enabled in the static perf.

Signed-off-by: Leo Yan 
Tested-by: Ian Rogers 
Cc: amadio@gentoo.org
Cc: James Clark 
Cc: Thomas Richter 
Link: https://lore.kernel.org/r/20240717082211.524826-6-leo.yan@arm.com
Signed-off-by: Namhyung Kim

perf: build: Only link libebl.a for old libdw

2024-07-26T18:15:25+00:00

Since libdw version 0.177, elfutils has merged libebl.a into libdw (see
the commit "libebl: Don't install libebl.a, libebl.h and remove backends
from spec." in the elfutils repository).

As a result, libebl.a does not exist on Debian Bullseye and newer
releases, causing static perf builds to fail on these distributions.

This commit checks the libdw version and only links libebl.a if it
detects that the libdw version is older than 0.177.

Signed-off-by: Leo Yan 
Tested-by: Ian Rogers 
Cc: amadio@gentoo.org
Cc: James Clark 
Cc: Thomas Richter 
Link: https://lore.kernel.org/r/20240717082211.524826-4-leo.yan@arm.com
Signed-off-by: Namhyung Kim

perf: build: Set Python configuration for cross compilation

2024-07-26T18:15:09+00:00

Python configuration has dedicated folders for different architectures.
For example, Python 3.11 has two folders as shown below, one for Arm64
and another for x86_64:

  /usr/lib/python3.11/config-3.11-aarch64-linux-gnu/
  /usr/lib/python3.11/config-3.11-x86_64-linux-gnu/

This commit updates the Python configuration path based on the
compiler's machine type, guiding the compiler to find the correct path
for Python libraries. It also renames the generated .so file name to
match the machine name.

Signed-off-by: Leo Yan 
Tested-by: Ian Rogers 
Cc: amadio@gentoo.org
Cc: James Clark 
Cc: Thomas Richter 
Link: https://lore.kernel.org/r/20240717082211.524826-3-leo.yan@arm.com
Signed-off-by: Namhyung Kim

perf: build: Setup PKG_CONFIG_LIBDIR for cross compilation

2024-07-26T18:14:56+00:00

On recent Linux distros like Ubuntu Noble and Debian Bookworm, the
'pkg-config-aarch64-linux-gnu' package is missing. As a result, the
aarch64-linux-gnu-pkg-config command is not available, which causes
build failures.

When a build passes the environment variables PKG_CONFIG_LIBDIR or
PKG_CONFIG_PATH, like a user uses make command or a build system
(like Yocto, Buildroot, etc) prepares the variables and passes to the
Perf's Makefile, the commit keeps these variables for package
configuration. Otherwise, this commit sets the PKG_CONFIG_LIBDIR
variable to use the Multiarch libs for the cross compilation.

Signed-off-by: Leo Yan 
Tested-by: Ian Rogers 
Cc: amadio@gentoo.org
Cc: Thomas Richter 
Link: https://lore.kernel.org/r/20240717082211.524826-2-leo.yan@arm.com
Signed-off-by: Namhyung Kim

perf tool: fix dereferencing NULL al->maps

2024-07-26T18:12:16+00:00

With 0dd5041c9a0e ("perf addr_location: Add init/exit/copy functions"),
when cpumode is 3 (macro PERF_RECORD_MISC_HYPERVISOR),
thread__find_map() could return with al->maps being NULL.

The path below could add a callchain_cursor_node with NULL ms.maps.

add_callchain_ip()
  thread__find_symbol(.., &al)
    thread__find_map(.., &al)   // al->maps becomes NULL
  ms.maps = maps__get(al.maps)
  callchain_cursor_append(..., &ms, ...)
    node->ms.maps = maps__get(ms->maps)

Then the path below would dereference NULL maps and get segfault.

fill_callchain_info()
  maps__machine(node->ms.maps);

Fix it by checking if maps is NULL in fill_callchain_info().

Fixes: 0dd5041c9a0e ("perf addr_location: Add init/exit/copy functions")
Signed-off-by: Casey Chen 
Reviewed-by: Ian Rogers 
Reviewed-by: Arnaldo Carvalho de Melo 
Acked-by: Namhyung Kim 
Cc: yzhong@purestorage.com
Link: https://lore.kernel.org/r/20240722211548.61455-1-cachen@purestorage.com
Signed-off-by: Namhyung Kim

Merge tag 'perf-tools-fixes-for-v6.11-2024-07-23' of git://git.kernel.org/pub/scm/linux/kernel/git/perf/perf-tools

2024-07-24T01:15:51+00:00

Pull perf tools fixes from Namhyung Kim:
 "Two fixes for building perf and other tools:

   - Fix breakage in tracing tools due to pkg-config for
     libtrace{event,fs}

   - Fix build of perf when libunwind is used"

* tag 'perf-tools-fixes-for-v6.11-2024-07-23' of git://git.kernel.org/pub/scm/linux/kernel/git/perf/perf-tools:
  perf dso: Fix build when libunwind is enabled
  tools/latency: Use pkg-config in lib_setup of Makefile.config
  tools/rtla: Use pkg-config in lib_setup of Makefile.config
  tools/verification: Use pkg-config in lib_setup of Makefile.config
  tools: Make pkg-config dependency checks usable by other tools
  perf build: Warn if libtracefs is not found