diff options
| author | Samuel Holland <[email protected]> | 2024-03-21 16:01:25 -0700 |
|---|---|---|
| committer | Palmer Dabbelt <[email protected]> | 2024-07-10 13:23:09 -0700 |
| commit | 56c1c1a09ab93c7b7c957860f01f8600d6c03143 (patch) | |
| tree | 2de1ee4eedb2fcb0665371e3114b5371f245225d /arch/riscv/kernel/sbi.c | |
| parent | a43fe27d650375cd9e5ea915c538f6f9eabd185e (diff) | |
riscv: Add tracepoints for SBI calls and returns
These are useful for measuring the latency of SBI calls. The SBI HSM
extension is excluded because those functions are called from contexts
such as cpuidle where instrumentation is not allowed.
Reviewed-by: Andrew Jones <[email protected]>
Signed-off-by: Samuel Holland <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Palmer Dabbelt <[email protected]>
Diffstat (limited to 'arch/riscv/kernel/sbi.c')
| -rw-r--r-- | arch/riscv/kernel/sbi.c | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/arch/riscv/kernel/sbi.c b/arch/riscv/kernel/sbi.c index e66e0999a800..a1d21d8f5293 100644 --- a/arch/riscv/kernel/sbi.c +++ b/arch/riscv/kernel/sbi.c @@ -14,6 +14,9 @@ #include <asm/smp.h> #include <asm/tlbflush.h> +#define CREATE_TRACE_POINTS +#include <asm/trace.h> + /* default SBI version is 0.1 */ unsigned long sbi_spec_version __ro_after_init = SBI_SPEC_VERSION_DEFAULT; EXPORT_SYMBOL(sbi_spec_version); @@ -31,6 +34,8 @@ struct sbiret sbi_ecall(int ext, int fid, unsigned long arg0, { struct sbiret ret; + trace_sbi_call(ext, fid); + register uintptr_t a0 asm ("a0") = (uintptr_t)(arg0); register uintptr_t a1 asm ("a1") = (uintptr_t)(arg1); register uintptr_t a2 asm ("a2") = (uintptr_t)(arg2); @@ -46,6 +51,8 @@ struct sbiret sbi_ecall(int ext, int fid, unsigned long arg0, ret.error = a0; ret.value = a1; + trace_sbi_return(ext, ret.error, ret.value); + return ret; } EXPORT_SYMBOL(sbi_ecall); |