From 374cde9c0aeb84da9e993641220c8b23adebab20 Mon Sep 17 00:00:00 2001
From: Lianbo Jiang <lijiang@redhat.com>
Date: Wed, 13 Jul 2022 17:23:05 +0800
Subject: [PATCH 1/3] Fix for the topa_entry issue
kernel commit 59388b9cbe20 ("[x86] perf/x86/intel/pt: Split ToPA metadata
and page layout") moved out the table of topa entry from struct topa, which
may cause the following failures:
[1] invalid kernel virtual address: 0 type: "struct topa_entry"
[2] current buffer not found
Signed-off-by: Lianbo Jiang <lijiang@redhat.com>
---
ptdump.c | 4 ++++
1 file changed, 4 insertions(+)
diff --git a/ptdump.c b/ptdump.c
index f5eb110fe1cd..736e1c8cddaf 100644
--- a/ptdump.c
+++ b/ptdump.c
@@ -183,6 +183,10 @@ int init_pt_info(int cpu)
&output_off))
goto out_error;
+ /* fixup the address of topa table */
+ if (STRUCT_EXISTS("topa_page") && topa_base)
+ topa_base -= MEMBER_SIZE("topa_page", "table");
+
dbgprintf(fp, "[%d] buf.cur=0x%016lx\n", cpu, topa_base);
dbgprintf(fp, "[%d] buf.cur_idx=0x%08x\n", cpu, topa_idx);
dbgprintf(fp, "[%d] buf.output_off=0x%016lx\n", cpu, output_off);
--
2.31.1