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