diff options
Diffstat (limited to 'drivers/hwtracing/coresight/coresight-self-hosted-trace.h')
| -rw-r--r-- | drivers/hwtracing/coresight/coresight-self-hosted-trace.h | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/drivers/hwtracing/coresight/coresight-self-hosted-trace.h b/drivers/hwtracing/coresight/coresight-self-hosted-trace.h index 23f05df3f173..53840a2c41f2 100644 --- a/drivers/hwtracing/coresight/coresight-self-hosted-trace.h +++ b/drivers/hwtracing/coresight/coresight-self-hosted-trace.h @@ -21,11 +21,13 @@ static inline void write_trfcr(u64 val) isb(); } -static inline void cpu_prohibit_trace(void) +static inline u64 cpu_prohibit_trace(void) { u64 trfcr = read_trfcr(); /* Prohibit tracing at EL0 & the kernel EL */ write_trfcr(trfcr & ~(TRFCR_ELx_ExTRE | TRFCR_ELx_E0TRE)); + /* Return the original value of the TRFCR */ + return trfcr; } #endif /* __CORESIGHT_SELF_HOSTED_TRACE_H */ |