From 14fe81602c9dd2f64ab803ed9c83b243226a6b05 Mon Sep 17 00:00:00 2001
From: Lianbo Jiang <lijiang@redhat.com>
Date: Tue, 19 Jul 2022 13:31:02 +0800
Subject: [PATCH 3/3] Do not dump on the Single Range Output mode

Kernel commit 670638477aed ("perf/x86/intel/pt: Opportunistically use
single range output mode") may cause the following failure:

  ptdump: page excluded: kernel virtual address: xxx  type: "struct topa_entry"
  Cannot read topa table

When working on the Single Range Output mode, not support to dump and
pint a warning.

Signed-off-by: Lianbo Jiang <lijiang@redhat.com>
---
 ptdump.c | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/ptdump.c b/ptdump.c
index 54e4391739e3..d48cd0126716 100644
--- a/ptdump.c
+++ b/ptdump.c
@@ -189,6 +189,17 @@ int init_pt_info(int cpu)
 		dbgprintf(fp, "  %d: 0x%016lx\n", i, page);
 	}
 
+	if (MEMBER_EXISTS("pt_buffer", "single")) {
+		uint single = 0;
+		if(!get_member(pt_info_ptr->pt_buffer, "pt_buffer", "single", &single)) {
+			fprintf(fp, "failed to read pt_buffer.");
+			return FALSE;
+		}
+
+		if (!!single)
+			error(FATAL, "Not support because of using Single Range Output instead of ToPA.\n");
+        }
+
 	/* Get pt registes saved on panic */
 	if(!get_member(pt_info_ptr->pt_buffer, "pt_buffer", "cur",
 		       &topa_base))
-- 
2.31.1