linux-kernel - [PATCH v2 2/2] ARM: dump: show page table level name

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Date:   Sun, 11 Sep 2022 12:41:28 +0800
From:   Kefeng Wang <wangkefeng.wang@...wei.com>
To:     Russell King <linux@...linux.org.uk>
CC:     Mike Rapoport <rppt@...nel.org>,
        Andrew Morton <akpm@...ux-foundation.org>,
        <linux-arm-kernel@...ts.infradead.org>,
        <linux-kernel@...r.kernel.org>,
        Kefeng Wang <wangkefeng.wang@...wei.com>
Subject: [PATCH v2 2/2] ARM: dump: show page table level name

ARM could have 3 page table level if ARM_LPAE enabled, or only 2 page
table level, let's show the page table level name when dump.

Signed-off-by: Kefeng Wang <wangkefeng.wang@...wei.com>
---
 arch/arm/mm/dump.c | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/arch/arm/mm/dump.c b/arch/arm/mm/dump.c
index 712da6a81b23..a71c2240e319 100644
--- a/arch/arm/mm/dump.c
+++ b/arch/arm/mm/dump.c
@@ -200,6 +200,7 @@ static const struct prot_bits section_bits[] = {
 };
 
 struct pg_level {
+	const char *name;
 	const struct prot_bits *bits;
 	size_t num;
 	u64 mask;
@@ -213,9 +214,11 @@ static struct pg_level pg_level[] = {
 	}, { /* p4d */
 	}, { /* pud */
 	}, { /* pmd */
+		.name	= (CONFIG_PGTABLE_LEVELS > 2) ? "PMD" : "PGD",
 		.bits	= section_bits,
 		.num	= ARRAY_SIZE(section_bits),
 	}, { /* pte */
+		.name	= "PTE",
 		.bits	= pte_bits,
 		.num	= ARRAY_SIZE(pte_bits),
 	},
@@ -282,7 +285,8 @@ static void note_page(struct pg_state *st, unsigned long addr,
 				delta >>= 10;
 				unit++;
 			}
-			pt_dump_seq_printf(st->seq, "%9lu%c", delta, *unit);
+			pt_dump_seq_printf(st->seq, "%9lu%c %s", delta, *unit,
+					   pg_level[st->level].name);
 			if (st->current_domain)
 				pt_dump_seq_printf(st->seq, " %s",
 							st->current_domain);
-- 
2.35.3