[PATCH 15/16] powerpc/mm: Add support for SPF events
From: Laurent Dufour <hidden>
Date: 2017-08-08 14:36:33
Also in:
linux-mm, lkml
Subsystem:
linux for powerpc (32-bit and 64-bit), the rest · Maintainers:
Madhavan Srinivasan, Michael Ellerman, Linus Torvalds
Add support for the new speculative page faults software events. Signed-off-by: Laurent Dufour <redacted> --- arch/powerpc/mm/fault.c | 7 ++++++- 1 file changed, 6 insertions(+), 1 deletion(-)
diff --git a/arch/powerpc/mm/fault.c b/arch/powerpc/mm/fault.c
index c6cd40901dd0..112c4bc9da70 100644
--- a/arch/powerpc/mm/fault.c
+++ b/arch/powerpc/mm/fault.c@@ -306,8 +306,13 @@ int do_page_fault(struct pt_regs *regs, unsigned long address, flags |= FAULT_FLAG_WRITE; fault = handle_speculative_fault(mm, address, flags); - if (!(fault & VM_FAULT_RETRY || fault & VM_FAULT_ERROR)) + if (!(fault & VM_FAULT_RETRY || fault & VM_FAULT_ERROR)) { + perf_sw_event(PERF_COUNT_SW_SPF_DONE, 1, + regs, address); goto done; + } + + perf_sw_event(PERF_COUNT_SW_SPF_FAILED, 1, regs, address); /* * Resetting flags since the following code assumes
--
2.7.4