diff options
| author |   Palmer Dabbelt <palmer@rivosinc.com> | 2023-08-16 07:28:26 -0700 |
|---|---|---|
| committer | Palmer Dabbelt <palmer@rivosinc.com> | 2023-08-23 09:07:28 -0700 |
| commit | 7aa7d502e4d5a42353325cb4bf2aa880b10168e9 (patch) | |
| tree | be8c3acd23298081b6a3085c0a7e1b2b36a48656 /tools/perf | |
| parent | riscv: Require FRAME_POINTER for some configurations (diff) | |
| parent | perf: tests: Adapt mmap-basic.c for riscv (diff) | |
| download | wireguard-linux-7aa7d502e4d5a42353325cb4bf2aa880b10168e9.tar.xz wireguard-linux-7aa7d502e4d5a42353325cb4bf2aa880b10168e9.zip | |
Merge patch series "riscv: Allow userspace to directly access perf counters"
Alexandre Ghiti <alexghiti@rivosinc.com> says:
riscv used to allow direct access to cycle/time/instret counters,
bypassing the perf framework, this patchset intends to allow the user to
mmap any counter when accessed through perf.
**Important**: The default mode is now user access through perf only, not
the legacy so some applications will break. However, we introduce a sysctl
perf_user_access like arm64 does, which will allow to switch to the legacy
mode described above.
This version needs openSBI v1.3 *and* a kernel fix that went upstream lately
(https://lore.kernel.org/lkml/20230616114831.3186980-1-maz@kernel.org/T/).
* b4-shazam-merge:
perf: tests: Adapt mmap-basic.c for riscv
tools: lib: perf: Implement riscv mmap support
Documentation: admin-guide: Add riscv sysctl_perf_user_access
drivers: perf: Implement perf event mmap support in the SBI backend
drivers: perf: Implement perf event mmap support in the legacy backend
riscv: Prepare for user-space perf event mmap support
drivers: perf: Rename riscv pmu sbi driver
riscv: Make legacy counter enum match the HW numbering
include: riscv: Fix wrong include guard in riscv_pmu.h
perf: Fix wrong comment about default event_idx
Link: https://lore.kernel.org/r/20230802080328.1213905-1-alexghiti@rivosinc.com
Signed-off-by: Palmer Dabbelt <palmer@rivosinc.com>
Diffstat (limited to 'tools/perf')
| -rw-r--r-- | tools/perf/tests/mmap-basic.c | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/tools/perf/tests/mmap-basic.c b/tools/perf/tests/mmap-basic.c index e68ca6229756..886a13a77a16 100644 --- a/tools/perf/tests/mmap-basic.c +++ b/tools/perf/tests/mmap-basic.c @@ -284,7 +284,8 @@ static struct test_case tests__basic_mmap[] = { "permissions"), TEST_CASE_REASON("User space counter reading of instructions", mmap_user_read_instr, -#if defined(__i386__) || defined(__x86_64__) || defined(__aarch64__) +#if defined(__i386__) || defined(__x86_64__) || defined(__aarch64__) || \ + (defined(__riscv) && __riscv_xlen == 64) "permissions" #else "unsupported" @@ -292,7 +293,8 @@ static struct test_case tests__basic_mmap[] = { ), TEST_CASE_REASON("User space counter reading of cycles", mmap_user_read_cycles, -#if defined(__i386__) || defined(__x86_64__) || defined(__aarch64__) +#if defined(__i386__) || defined(__x86_64__) || defined(__aarch64__) || \ + (defined(__riscv) && __riscv_xlen == 64) "permissions" #else "unsupported" |