[PATCH 14/16] x86/mm: Add support for SPF events
From: Laurent Dufour <hidden>
Date: 2017-08-08 14:37:16
Also in:
linux-mm, lkml
Subsystem:
the rest, x86 architecture (32-bit and 64-bit), x86 mm · Maintainers:
Linus Torvalds, Thomas Gleixner, Ingo Molnar, Borislav Petkov, Dave Hansen, Andy Lutomirski, Peter Zijlstra
Add support for the new speculative page faults software events. Signed-off-by: Laurent Dufour <redacted> --- arch/x86/mm/fault.c | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-)
diff --git a/arch/x86/mm/fault.c b/arch/x86/mm/fault.c
index 46fb9c2a832d..17985f11b9da 100644
--- a/arch/x86/mm/fault.c
+++ b/arch/x86/mm/fault.c@@ -1374,8 +1374,12 @@ __do_page_fault(struct pt_regs *regs, unsigned long error_code, * requires the vma pointer to be set. So in that case, * we fall through the normal path. */ - 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); } /*
--
2.7.4