The existing perf kvm code is using the arch directory, which means a
data file can only be processed on the same machine type that it was
recorded. Switch to using the ELF machine of the session at runtime to
set up the KVM support, making it cross-architectural. So that the ELF
machine number is available early in initialization add it to the perf
data file header.
v3: Fix NO_LIBTRACEEVENT=1 build, kvm-stat-loongarch.c for old elf.h
files and 32-bit build of kvm-stat-s390.c as reported by
Arnaldo. Drop the first kvm stat live test patch that Arnaldo
reported as merged.
v2: Wire up the perf data header to have the e_machine and allow early
initialization of the KVM operations based upon it.
https://lore.kernel.org/lkml/20260131200224.1296136-1-irogers@google.com/#t
v1: https://lore.kernel.org/lkml/20260128074106.788156-1-irogers@google.com/
Ian Rogers (5):
perf kvm stat: Remove use of the arch directory
perf kvm: Wire up e_machine
perf session: Add e_flags to the e_machine helper
perf header: Add e_machine/e_flags to the header
perf thread: Don't require machine to compute the e_machine
tools/perf/Makefile.config | 4 -
tools/perf/arch/arm64/Makefile | 1 -
tools/perf/arch/arm64/util/Build | 1 -
tools/perf/arch/loongarch/Makefile | 1 -
tools/perf/arch/loongarch/util/Build | 1 -
tools/perf/arch/powerpc/Makefile | 1 -
tools/perf/arch/powerpc/util/Build | 1 -
tools/perf/arch/riscv/Makefile | 1 -
tools/perf/arch/riscv/util/Build | 2 -
tools/perf/arch/s390/Makefile | 1 -
tools/perf/arch/s390/util/Build | 1 -
tools/perf/arch/x86/Makefile | 1 -
tools/perf/arch/x86/util/Build | 1 -
tools/perf/builtin-kvm.c | 73 +++---
tools/perf/builtin-report.c | 4 +-
tools/perf/builtin-script.c | 6 +-
tools/perf/util/Build | 3 +-
tools/perf/util/env.h | 3 +
tools/perf/util/evsel.c | 6 +-
tools/perf/util/evsel.h | 1 +
tools/perf/util/header.c | 33 +++
tools/perf/util/header.h | 1 +
tools/perf/util/kvm-stat-arch/Build | 6 +
.../kvm-stat-arch}/arm64_exception_types.h | 0
.../kvm-stat-arch}/book3s_hcalls.h | 0
.../kvm-stat-arch}/book3s_hv_exits.h | 0
.../kvm-stat-arch/kvm-stat-arm64.c} | 43 ++--
.../kvm-stat-arch/kvm-stat-loongarch.c} | 49 ++--
.../kvm-stat-arch/kvm-stat-powerpc.c} | 61 ++---
.../kvm-stat-arch/kvm-stat-riscv.c} | 42 ++--
.../kvm-stat-arch/kvm-stat-s390.c} | 40 ++--
.../kvm-stat-arch/kvm-stat-x86.c} | 44 ++--
.../kvm-stat-arch}/riscv_trap_types.h | 2 +-
tools/perf/util/kvm-stat.c | 215 +++++++++++++++++-
tools/perf/util/kvm-stat.h | 79 +++++--
.../scripting-engines/trace-event-python.c | 8 +-
tools/perf/util/session.c | 62 ++++-
tools/perf/util/session.h | 2 +-
tools/perf/util/thread.c | 5 +
39 files changed, 590 insertions(+), 215 deletions(-)
create mode 100644 tools/perf/util/kvm-stat-arch/Build
rename tools/perf/{arch/arm64/util => util/kvm-stat-arch}/arm64_exception_types.h (100%)
rename tools/perf/{arch/powerpc/util => util/kvm-stat-arch}/book3s_hcalls.h (100%)
rename tools/perf/{arch/powerpc/util => util/kvm-stat-arch}/book3s_hv_exits.h (100%)
rename tools/perf/{arch/arm64/util/kvm-stat.c => util/kvm-stat-arch/kvm-stat-arm64.c} (62%)
rename tools/perf/{arch/loongarch/util/kvm-stat.c => util/kvm-stat-arch/kvm-stat-loongarch.c} (77%)
rename tools/perf/{arch/powerpc/util/kvm-stat.c => util/kvm-stat-arch/kvm-stat-powerpc.c} (78%)
rename tools/perf/{arch/riscv/util/kvm-stat.c => util/kvm-stat-arch/kvm-stat-riscv.c} (57%)
rename tools/perf/{arch/s390/util/kvm-stat.c => util/kvm-stat-arch/kvm-stat-s390.c} (77%)
rename tools/perf/{arch/x86/util/kvm-stat.c => util/kvm-stat-arch/kvm-stat-x86.c} (88%)
rename tools/perf/{arch/riscv/util => util/kvm-stat-arch}/riscv_trap_types.h (96%)
--
2.53.0.rc2.204.g2597b5adb4-goog