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0b26b346a8
riscv has no arch level perf test: tests/builtin-test.c only picks up arch_tests[] for x86, arm64 and powerpc64, tests/Build only builds the generic dwarf unwind test driver for x86, arm, arm64 and powerpc, and arch/riscv/tests/ did not exist. "Test dwarf unwind" was therefore never registered on riscv, even though DWARF is the only reliable way to walk a riscv user stack -- the arch callchain code walks frame pointers only -- and both unwinders already support riscv, elfutils libdw generically and libunwind through util/libunwind-arch/libunwind-riscv.c. Add perf_regs_load() and the arch unwind sample helper modelled on the arm64 ones, and wire riscv into the two gates. The x1..x31 slots of enum perf_event_riscv_regs match the hardware registers one to one, and PERF_REG_RISCV_PC is filled with ra so that unwinding starts at the caller. Reviewed-by: Ian Rogers <irogers@google.com> Signed-off-by: Chen Pei <cp0613@linux.alibaba.com> Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> |
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| .. | ||
| accounting | ||
| arch | ||
| bootconfig | ||
| bpf | ||
| build | ||
| certs | ||
| cgroup | ||
| counter | ||
| crypto | ||
| debugging | ||
| dma | ||
| docs | ||
| firewire | ||
| firmware | ||
| gpio | ||
| hv | ||
| iio | ||
| include | ||
| kvm/kvm_stat | ||
| laptop | ||
| leds | ||
| lib | ||
| memory-model | ||
| mm | ||
| net | ||
| objtool | ||
| pcmcia | ||
| perf | ||
| platform/x86/amd | ||
| power | ||
| rcu | ||
| sched | ||
| sched_ext | ||
| scripts | ||
| sound | ||
| spi | ||
| testing | ||
| thermal | ||
| time | ||
| tracing | ||
| unittests | ||
| usb | ||
| verification | ||
| virtio | ||
| wmi | ||
| workqueue | ||
| writeback | ||
| Makefile | ||