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| author |   Anton Blanchard <anton@ozlabs.org> | 2018-10-04 16:23:37 +1000 |
|---|---|---|
| committer |   Michael Ellerman <mpe@ellerman.id.au> | 2019-05-01 16:45:05 +1000 |
| commit | 5b2a15296210d3b70e06d0f09a8e701ff74ccbe8 (patch) | |
| tree | f52b9fc358a80514fe1d87416c3c8cd1b77df088 | |
| parent | ocxl: remove set but not used variables 'tid' and 'lpid' (diff) | |
| download | linux-dev-5b2a15296210d3b70e06d0f09a8e701ff74ccbe8.tar.xz linux-dev-5b2a15296210d3b70e06d0f09a8e701ff74ccbe8.zip | |
powerpc: Add doorbell tracepoints
When analysing sources of OS jitter, I noticed that doorbells cannot be
traced.
Signed-off-by: Anton Blanchard <anton@ozlabs.org>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
| -rw-r--r-- | arch/powerpc/include/asm/trace.h | 16 | ||||
| -rw-r--r-- | arch/powerpc/kernel/dbell.c | 3 |
2 files changed, 19 insertions, 0 deletions
diff --git a/arch/powerpc/include/asm/trace.h b/arch/powerpc/include/asm/trace.h index 58ef8c43a89d..08cd60cd70b7 100644 --- a/arch/powerpc/include/asm/trace.h +++ b/arch/powerpc/include/asm/trace.h @@ -54,6 +54,22 @@ DEFINE_EVENT(ppc64_interrupt_class, timer_interrupt_exit, TP_ARGS(regs) ); +#ifdef CONFIG_PPC_DOORBELL +DEFINE_EVENT(ppc64_interrupt_class, doorbell_entry, + + TP_PROTO(struct pt_regs *regs), + + TP_ARGS(regs) +); + +DEFINE_EVENT(ppc64_interrupt_class, doorbell_exit, + + TP_PROTO(struct pt_regs *regs), + + TP_ARGS(regs) +); +#endif + #ifdef CONFIG_PPC_PSERIES extern int hcall_tracepoint_regfunc(void); extern void hcall_tracepoint_unregfunc(void); diff --git a/arch/powerpc/kernel/dbell.c b/arch/powerpc/kernel/dbell.c index b6fe883b1016..5ec3b3835925 100644 --- a/arch/powerpc/kernel/dbell.c +++ b/arch/powerpc/kernel/dbell.c @@ -18,6 +18,7 @@ #include <asm/dbell.h> #include <asm/irq_regs.h> #include <asm/kvm_ppc.h> +#include <asm/trace.h> #ifdef CONFIG_SMP @@ -81,6 +82,7 @@ void doorbell_exception(struct pt_regs *regs) struct pt_regs *old_regs = set_irq_regs(regs); irq_enter(); + trace_doorbell_entry(regs); ppc_msgsync(); @@ -91,6 +93,7 @@ void doorbell_exception(struct pt_regs *regs) smp_ipi_demux_relaxed(); /* already performed the barrier */ + trace_doorbell_exit(regs); irq_exit(); set_irq_regs(old_regs); } |