|
 |
ccf185 |
From 14fe81602c9dd2f64ab803ed9c83b243226a6b05 Mon Sep 17 00:00:00 2001
|
|
|
ccf185 |
From: Lianbo Jiang <lijiang@redhat.com>
|
|
|
ccf185 |
Date: Tue, 19 Jul 2022 13:31:02 +0800
|
|
|
ccf185 |
Subject: [PATCH 3/3] Do not dump on the Single Range Output mode
|
|
|
ccf185 |
|
|
|
ccf185 |
Kernel commit 670638477aed ("perf/x86/intel/pt: Opportunistically use
|
|
|
ccf185 |
single range output mode") may cause the following failure:
|
|
|
ccf185 |
|
|
|
ccf185 |
ptdump: page excluded: kernel virtual address: xxx type: "struct topa_entry"
|
|
|
ccf185 |
Cannot read topa table
|
|
|
ccf185 |
|
|
|
ccf185 |
When working on the Single Range Output mode, not support to dump and
|
|
|
ccf185 |
pint a warning.
|
|
|
ccf185 |
|
|
|
ccf185 |
Signed-off-by: Lianbo Jiang <lijiang@redhat.com>
|
|
|
ccf185 |
---
|
|
|
ccf185 |
ptdump.c | 11 +++++++++++
|
|
|
ccf185 |
1 file changed, 11 insertions(+)
|
|
|
ccf185 |
|
|
|
ccf185 |
diff --git a/ptdump.c b/ptdump.c
|
|
|
ccf185 |
index 54e4391739e3..d48cd0126716 100644
|
|
|
ccf185 |
--- a/ptdump.c
|
|
|
ccf185 |
+++ b/ptdump.c
|
|
|
ccf185 |
@@ -189,6 +189,17 @@ int init_pt_info(int cpu)
|
|
|
ccf185 |
dbgprintf(fp, " %d: 0x%016lx\n", i, page);
|
|
|
ccf185 |
}
|
|
|
ccf185 |
|
|
|
ccf185 |
+ if (MEMBER_EXISTS("pt_buffer", "single")) {
|
|
|
ccf185 |
+ uint single = 0;
|
|
|
ccf185 |
+ if(!get_member(pt_info_ptr->pt_buffer, "pt_buffer", "single", &single)) {
|
|
|
ccf185 |
+ fprintf(fp, "failed to read pt_buffer.");
|
|
|
ccf185 |
+ return FALSE;
|
|
|
ccf185 |
+ }
|
|
|
ccf185 |
+
|
|
|
ccf185 |
+ if (!!single)
|
|
|
ccf185 |
+ error(FATAL, "Not support because of using Single Range Output instead of ToPA.\n");
|
|
|
ccf185 |
+ }
|
|
|
ccf185 |
+
|
|
|
ccf185 |
/* Get pt registes saved on panic */
|
|
|
ccf185 |
if(!get_member(pt_info_ptr->pt_buffer, "pt_buffer", "cur",
|
|
|
ccf185 |
&topa_base))
|
|
|
ccf185 |
--
|
|
|
ccf185 |
2.31.1
|
|
|
ccf185 |
|