From mboxrd@z Thu Jan 1 00:00:00 1970 From: jeremy.linton@arm.com (Jeremy Linton) Date: Wed, 7 Oct 2015 12:00:23 -0500 Subject: [PATCH 5/7] arm64: Make the kernel page dump utility aware of the CONT bit In-Reply-To: <1444237225-13802-1-git-send-email-jeremy.linton@arm.com> References: <1444237225-13802-1-git-send-email-jeremy.linton@arm.com> Message-ID: <1444237225-13802-6-git-send-email-jeremy.linton@arm.com> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org The kernel page dump utility needs to be aware of the CONT bit before it will break up pages ranges for display. Signed-off-by: Jeremy Linton --- arch/arm64/mm/dump.c | 18 +++++++++++++++++- 1 file changed, 17 insertions(+), 1 deletion(-) diff --git a/arch/arm64/mm/dump.c b/arch/arm64/mm/dump.c index f3d6221..5a22a11 100644 --- a/arch/arm64/mm/dump.c +++ b/arch/arm64/mm/dump.c @@ -67,6 +67,12 @@ static struct addr_marker address_markers[] = { { -1, NULL }, }; +/* + * The page dumper groups page table entries of the same type into a single + * description. It uses pg_state to track the range information while + * iterating over the pte entries. When the continuity is broken it then + * dumps out a description of the range. + */ struct pg_state { struct seq_file *seq; const struct addr_marker *marker; @@ -114,6 +120,16 @@ static const struct prot_bits pte_bits[] = { .set = "NG", .clear = " ", }, { + .mask = PTE_CONT, + .val = PTE_CONT, + .set = "CON", + .clear = " ", + }, { + .mask = PTE_TABLE_BIT, + .val = PTE_TABLE_BIT, + .set = " ", + .clear = "BLK", + }, { .mask = PTE_UXN, .val = PTE_UXN, .set = "UXN", @@ -198,7 +214,7 @@ static void note_page(struct pg_state *st, unsigned long addr, unsigned level, unsigned long delta; if (st->current_prot) { - seq_printf(st->seq, "0x%16lx-0x%16lx ", + seq_printf(st->seq, "0x%016lx-0x%016lx ", st->start_address, addr); delta = (addr - st->start_address) >> 10; -- 2.4.3