diff options
| author | Anton Blanchard <anton@ozlabs.org> | 2018-10-04 09:23:37 +0300 |
|---|---|---|
| committer | Michael Ellerman <mpe@ellerman.id.au> | 2019-05-01 09:45:05 +0300 |
| commit | 5b2a15296210d3b70e06d0f09a8e701ff74ccbe8 (patch) | |
| tree | f52b9fc358a80514fe1d87416c3c8cd1b77df088 /arch/powerpc/kernel/dbell.c | |
| parent | 32eeb5614d3bf166e84fe69bb5f3a51a48cac7a1 (diff) | |
| download | linux-5b2a15296210d3b70e06d0f09a8e701ff74ccbe8.tar.xz | |
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>
Diffstat (limited to 'arch/powerpc/kernel/dbell.c')
| -rw-r--r-- | arch/powerpc/kernel/dbell.c | 3 |
1 files changed, 3 insertions, 0 deletions
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); } |