From: Steven Price <steven.price@arm.com> To: linux-mm@kvack.org Cc: "Steven Price" <steven.price@arm.com>, "Andy Lutomirski" <luto@kernel.org>, "Ard Biesheuvel" <ard.biesheuvel@linaro.org>, "Arnd Bergmann" <arnd@arndb.de>, "Borislav Petkov" <bp@alien8.de>, "Catalin Marinas" <catalin.marinas@arm.com>, "Dave Hansen" <dave.hansen@linux.intel.com>, "Ingo Molnar" <mingo@redhat.com>, "James Morse" <james.morse@arm.com>, "Jérôme Glisse" <jglisse@redhat.com>, "Peter Zijlstra" <peterz@infradead.org>, "Thomas Gleixner" <tglx@linutronix.de>, "Will Deacon" <will@kernel.org>, x86@kernel.org, "H. Peter Anvin" <hpa@zytor.com>, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, "Mark Rutland" <Mark.Rutland@arm.com>, "Liang, Kan" <kan.liang@linux.intel.com>, "Andrew Morton" <akpm@linux-foundation.org> Subject: [PATCH v14 22/22] arm64: mm: Display non-present entries in ptdump Date: Mon, 28 Oct 2019 13:59:10 +0000 [thread overview] Message-ID: <20191028135910.33253-23-steven.price@arm.com> (raw) In-Reply-To: <20191028135910.33253-1-steven.price@arm.com> Previously the /sys/kernel/debug/kernel_page_tables file would only show lines for entries present in the page tables. However it is useful to also show non-present entries as this makes the size and level of the holes more visible. This aligns the behaviour with x86 which also shows holes. Signed-off-by: Steven Price <steven.price@arm.com> --- arch/arm64/mm/dump.c | 25 +++++++++++++------------ 1 file changed, 13 insertions(+), 12 deletions(-) diff --git a/arch/arm64/mm/dump.c b/arch/arm64/mm/dump.c index 9d9b740a86d2..3203dd8e6d0a 100644 --- a/arch/arm64/mm/dump.c +++ b/arch/arm64/mm/dump.c @@ -269,21 +269,22 @@ static void note_page(struct ptdump_state *pt_st, unsigned long addr, int level, if (st->current_prot) { note_prot_uxn(st, addr); note_prot_wx(st, addr); - pt_dump_seq_printf(st->seq, "0x%016lx-0x%016lx ", + } + + pt_dump_seq_printf(st->seq, "0x%016lx-0x%016lx ", st->start_address, addr); - delta = (addr - st->start_address) >> 10; - while (!(delta & 1023) && unit[1]) { - delta >>= 10; - unit++; - } - pt_dump_seq_printf(st->seq, "%9lu%c %s", delta, *unit, - pg_level[st->level].name); - if (pg_level[st->level].bits) - dump_prot(st, pg_level[st->level].bits, - pg_level[st->level].num); - pt_dump_seq_puts(st->seq, "\n"); + delta = (addr - st->start_address) >> 10; + while (!(delta & 1023) && unit[1]) { + delta >>= 10; + unit++; } + pt_dump_seq_printf(st->seq, "%9lu%c %s", delta, *unit, + pg_level[st->level].name); + if (st->current_prot && pg_level[st->level].bits) + dump_prot(st, pg_level[st->level].bits, + pg_level[st->level].num); + pt_dump_seq_puts(st->seq, "\n"); if (addr >= st->marker[1].start_address) { st->marker++; -- 2.20.1
WARNING: multiple messages have this Message-ID (diff)
From: Steven Price <steven.price@arm.com> To: linux-mm@kvack.org Cc: "Mark Rutland" <Mark.Rutland@arm.com>, x86@kernel.org, "Arnd Bergmann" <arnd@arndb.de>, "Ard Biesheuvel" <ard.biesheuvel@linaro.org>, "Peter Zijlstra" <peterz@infradead.org>, "Catalin Marinas" <catalin.marinas@arm.com>, "Dave Hansen" <dave.hansen@linux.intel.com>, linux-kernel@vger.kernel.org, "Steven Price" <steven.price@arm.com>, "Jérôme Glisse" <jglisse@redhat.com>, "Ingo Molnar" <mingo@redhat.com>, "Borislav Petkov" <bp@alien8.de>, "Andy Lutomirski" <luto@kernel.org>, "H. Peter Anvin" <hpa@zytor.com>, "James Morse" <james.morse@arm.com>, "Thomas Gleixner" <tglx@linutronix.de>, "Will Deacon" <will@kernel.org>, "Andrew Morton" <akpm@linux-foundation.org>, linux-arm-kernel@lists.infradead.org, "Liang, Kan" <kan.liang@linux.intel.com> Subject: [PATCH v14 22/22] arm64: mm: Display non-present entries in ptdump Date: Mon, 28 Oct 2019 13:59:10 +0000 [thread overview] Message-ID: <20191028135910.33253-23-steven.price@arm.com> (raw) In-Reply-To: <20191028135910.33253-1-steven.price@arm.com> Previously the /sys/kernel/debug/kernel_page_tables file would only show lines for entries present in the page tables. However it is useful to also show non-present entries as this makes the size and level of the holes more visible. This aligns the behaviour with x86 which also shows holes. Signed-off-by: Steven Price <steven.price@arm.com> --- arch/arm64/mm/dump.c | 25 +++++++++++++------------ 1 file changed, 13 insertions(+), 12 deletions(-) diff --git a/arch/arm64/mm/dump.c b/arch/arm64/mm/dump.c index 9d9b740a86d2..3203dd8e6d0a 100644 --- a/arch/arm64/mm/dump.c +++ b/arch/arm64/mm/dump.c @@ -269,21 +269,22 @@ static void note_page(struct ptdump_state *pt_st, unsigned long addr, int level, if (st->current_prot) { note_prot_uxn(st, addr); note_prot_wx(st, addr); - pt_dump_seq_printf(st->seq, "0x%016lx-0x%016lx ", + } + + pt_dump_seq_printf(st->seq, "0x%016lx-0x%016lx ", st->start_address, addr); - delta = (addr - st->start_address) >> 10; - while (!(delta & 1023) && unit[1]) { - delta >>= 10; - unit++; - } - pt_dump_seq_printf(st->seq, "%9lu%c %s", delta, *unit, - pg_level[st->level].name); - if (pg_level[st->level].bits) - dump_prot(st, pg_level[st->level].bits, - pg_level[st->level].num); - pt_dump_seq_puts(st->seq, "\n"); + delta = (addr - st->start_address) >> 10; + while (!(delta & 1023) && unit[1]) { + delta >>= 10; + unit++; } + pt_dump_seq_printf(st->seq, "%9lu%c %s", delta, *unit, + pg_level[st->level].name); + if (st->current_prot && pg_level[st->level].bits) + dump_prot(st, pg_level[st->level].bits, + pg_level[st->level].num); + pt_dump_seq_puts(st->seq, "\n"); if (addr >= st->marker[1].start_address) { st->marker++; -- 2.20.1 _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
next prev parent reply other threads:[~2019-10-28 14:00 UTC|newest] Thread overview: 75+ messages / expand[flat|nested] mbox.gz Atom feed top 2019-10-28 13:58 [PATCH v14 00/22] Generic page walk and ptdump Steven Price 2019-10-28 13:58 ` Steven Price 2019-10-28 13:58 ` [PATCH v14 01/22] mm: Add generic p?d_leaf() macros Steven Price 2019-10-28 13:58 ` Steven Price 2019-10-28 13:58 ` [PATCH v14 02/22] arc: mm: Add p?d_leaf() definitions Steven Price 2019-10-28 13:58 ` Steven Price 2019-10-28 13:58 ` Steven Price 2019-10-28 13:58 ` [PATCH v14 03/22] arm: " Steven Price 2019-10-28 13:58 ` Steven Price 2019-10-28 13:58 ` [PATCH v14 04/22] arm64: " Steven Price 2019-10-28 13:58 ` Steven Price 2019-10-30 15:31 ` Catalin Marinas 2019-10-30 15:31 ` Catalin Marinas 2019-10-28 13:58 ` [PATCH v14 05/22] mips: " Steven Price 2019-10-28 13:58 ` Steven Price 2019-10-28 13:58 ` [PATCH v14 06/22] powerpc: " Steven Price 2019-10-28 13:58 ` Steven Price 2019-10-28 13:58 ` Steven Price 2019-10-28 13:58 ` [PATCH v14 07/22] riscv: " Steven Price 2019-10-28 13:58 ` Steven Price 2019-10-28 13:58 ` Steven Price 2019-10-28 13:58 ` [PATCH v14 08/22] s390: " Steven Price 2019-10-28 13:58 ` Steven Price 2019-10-28 13:58 ` [PATCH v14 09/22] sparc: " Steven Price 2019-10-28 13:58 ` Steven Price 2019-10-28 13:58 ` Steven Price 2019-10-28 13:58 ` [PATCH v14 10/22] x86: " Steven Price 2019-10-28 13:58 ` Steven Price 2019-10-28 13:58 ` [PATCH v14 11/22] mm: pagewalk: Add p4d_entry() and pgd_entry() Steven Price 2019-10-28 13:58 ` Steven Price 2019-10-28 13:59 ` [PATCH v14 12/22] mm: pagewalk: Allow walking without vma Steven Price 2019-10-28 13:59 ` Steven Price 2019-10-31 15:15 ` [mm] 9343f6818b: BUG:kernel_NULL_pointer_dereference,address kernel test robot 2019-10-31 15:15 ` kernel test robot 2019-10-31 15:15 ` [LTP] [mm] 9343f6818b: BUG:kernel_NULL_pointer_dereference, address kernel test robot 2019-10-31 17:22 ` [mm] 9343f6818b: BUG:kernel_NULL_pointer_dereference,address Steven Price 2019-10-31 17:22 ` [mm] 9343f6818b: BUG:kernel_NULL_pointer_dereference, address Steven Price 2019-10-31 17:22 ` [LTP] " Steven Price 2019-10-31 17:22 ` [mm] 9343f6818b: BUG:kernel_NULL_pointer_dereference,address Steven Price 2019-10-28 13:59 ` [PATCH v14 13/22] mm: pagewalk: Add test_p?d callbacks Steven Price 2019-10-28 13:59 ` Steven Price 2019-10-28 13:59 ` [PATCH v14 14/22] mm: pagewalk: Add 'depth' parameter to pte_hole Steven Price 2019-10-28 13:59 ` Steven Price 2019-10-28 13:59 ` [PATCH v14 15/22] x86: mm: Point to struct seq_file from struct pg_state Steven Price 2019-10-28 13:59 ` Steven Price 2019-10-28 13:59 ` [PATCH v14 16/22] x86: mm+efi: Convert ptdump_walk_pgd_level() to take a mm_struct Steven Price 2019-10-28 13:59 ` Steven Price 2019-10-28 13:59 ` [PATCH v14 17/22] x86: mm: Convert ptdump_walk_pgd_level_debugfs() to take an mm_struct Steven Price 2019-10-28 13:59 ` Steven Price 2019-10-28 13:59 ` [PATCH v14 18/22] x86: mm: Convert ptdump_walk_pgd_level_core() " Steven Price 2019-10-28 13:59 ` Steven Price 2019-10-28 13:59 ` [PATCH v14 19/22] mm: Add generic ptdump Steven Price 2019-10-28 13:59 ` Steven Price 2019-10-30 16:48 ` Catalin Marinas 2019-10-30 16:48 ` Catalin Marinas 2019-10-28 13:59 ` [PATCH v14 20/22] x86: mm: Convert dump_pagetables to use walk_page_range Steven Price 2019-10-28 13:59 ` Steven Price 2019-10-28 13:59 ` [PATCH v14 21/22] arm64: mm: Convert mm/dump.c to use walk_page_range() Steven Price 2019-10-28 13:59 ` Steven Price 2019-10-30 16:45 ` Catalin Marinas 2019-10-30 16:45 ` Catalin Marinas 2019-10-31 13:32 ` Steven Price 2019-10-31 13:32 ` Steven Price 2019-10-31 13:33 ` [PATCH] mm: ptdump: Reduce level numbers by 1 in note_page() Steven Price 2019-10-31 13:33 ` Steven Price 2019-10-31 14:36 ` Catalin Marinas 2019-10-31 14:36 ` Catalin Marinas 2019-10-31 14:00 ` [PATCH v14 21/22] arm64: mm: Convert mm/dump.c to use walk_page_range() Catalin Marinas 2019-10-31 14:00 ` Catalin Marinas 2019-10-31 14:37 ` Catalin Marinas 2019-10-31 14:37 ` Catalin Marinas 2019-10-28 13:59 ` Steven Price [this message] 2019-10-28 13:59 ` [PATCH v14 22/22] arm64: mm: Display non-present entries in ptdump Steven Price 2019-10-30 16:50 ` Catalin Marinas 2019-10-30 16:50 ` Catalin Marinas
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