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[PATCH 1/5] x86/traps: Collect PERFC_exceptions stats for IST vectors too
- To: Xen-devel <xen-devel@xxxxxxxxxxxxxxxxxxxx>
- From: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
- Date: Fri, 19 Nov 2021 18:21:02 +0000
- Authentication-results: esa6.hc3370-68.iphmx.com; dkim=none (message not signed) header.i=none
- Cc: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>, Jan Beulich <JBeulich@xxxxxxxx>, Roger Pau Monné <roger.pau@xxxxxxxxxx>, Wei Liu <wl@xxxxxxx>
- Delivery-date: Fri, 19 Nov 2021 18:21:38 +0000
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- List-id: Xen developer discussion <xen-devel.lists.xenproject.org>
This causes NMIs, #DB and #MC to be counted, rather than being reported as 0.
Signed-off-by: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
---
CC: Jan Beulich <JBeulich@xxxxxxxx>
CC: Roger Pau Monné <roger.pau@xxxxxxxxxx>
CC: Wei Liu <wl@xxxxxxx>
---
xen/arch/x86/x86_64/entry.S | 7 +++++++
1 file changed, 7 insertions(+)
diff --git a/xen/arch/x86/x86_64/entry.S b/xen/arch/x86/x86_64/entry.S
index d5998acf8806..3caa5654768d 100644
--- a/xen/arch/x86/x86_64/entry.S
+++ b/xen/arch/x86/x86_64/entry.S
@@ -1005,6 +1005,13 @@ handle_ist_exception:
#endif
movq %rsp,%rdi
movzbl UREGS_entry_vector(%rsp),%eax
+
+#ifdef CONFIG_PERF_COUNTERS
+ lea per_cpu__perfcounters(%rip), %rcx
+ add STACK_CPUINFO_FIELD(per_cpu_offset)(%r14), %rcx
+ incl ASM_PERFC_exceptions * 4(%rcx, %rax, 4)
+#endif
+
leaq exception_table(%rip),%rdx
mov (%rdx, %rax, 8), %rdx
INDIRECT_CALL %rdx
--
2.11.0
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