From: Steven Price <steven.price@arm.com>
To: Ard Biesheuvel <ardb@kernel.org>
Cc: "Mark Rutland" <Mark.Rutland@arm.com>,
"the arch/x86 maintainers" <x86@kernel.org>,
"Arnd Bergmann" <arnd@arndb.de>,
"Peter Zijlstra" <peterz@infradead.org>,
"Catalin Marinas" <Catalin.Marinas@arm.com>,
"Dave Hansen" <dave.hansen@linux.intel.com>,
"Linux Kernel Mailing List" <linux-kernel@vger.kernel.org>,
Linux-MM <linux-mm@kvack.org>,
"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>,
"Andrew Morton" <akpm@linux-foundation.org>,
"Will Deacon" <will@kernel.org>,
"Thomas Gleixner" <tglx@linutronix.de>,
linux-arm-kernel <linux-arm-kernel@lists.infradead.org>,
"Liang, Kan" <kan.liang@linux.intel.com>
Subject: Re: [PATCH v17 21/23] arm64: mm: Convert mm/dump.c to use walk_page_range()
Date: Mon, 17 Feb 2020 10:01:00 +0000 [thread overview]
Message-ID: <ee4f53ec-601b-3698-1479-f7aeaada38ad@arm.com> (raw)
In-Reply-To: <CAKv+Gu8Hed9jGiqdgaqJ93JhErJA5OfGRpiarU=YKXb6vQUyMQ@mail.gmail.com>
On 16/02/2020 16:25, Ard Biesheuvel wrote:
> On Wed, 18 Dec 2019 at 17:25, Steven Price <steven.price@arm.com> wrote:
>>
>> Now walk_page_range() can walk kernel page tables, we can switch the
>> arm64 ptdump code over to using it, simplifying the code.
>>
>> Reviewed-by: Catalin Marinas <catalin.marinas@arm.com>
>> Signed-off-by: Steven Price <steven.price@arm.com>
>
> I did not realize this at the time, but this patch removes the ability
> to dump the EFI page tables on 32-bit ARM. Was that intentional?
No that wasn't intentional, but I can't instantly see how this change
affects 32-bit ARM.
<snip (files in arch/arm64)>
>> diff --git a/drivers/firmware/efi/arm-runtime.c b/drivers/firmware/efi/arm-runtime.c
>> index 899b803842bb..9dda2602c862 100644
>> --- a/drivers/firmware/efi/arm-runtime.c
>> +++ b/drivers/firmware/efi/arm-runtime.c
>> @@ -27,7 +27,7 @@
>>
>> extern u64 efi_system_table;
>>
>> -#ifdef CONFIG_ARM64_PTDUMP_DEBUGFS
>> +#if defined(CONFIG_PTDUMP_DEBUGFS) && defined(CONFIG_ARM64)
The previous define was *ARM64* so should never have been true when
building for arm. The new condition should be equivalent (arm64 &&
ptdump enabled).
Am I missing something?
Steve
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next prev parent reply other threads:[~2020-02-17 10:01 UTC|newest]
Thread overview: 34+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-12-18 16:23 [PATCH v17 00/23] Generic page walk and ptdump Steven Price
2019-12-18 16:23 ` [PATCH v17 01/23] mm: Add generic p?d_leaf() macros Steven Price
2019-12-19 11:43 ` Michael Ellerman
2019-12-20 11:48 ` Steven Price
2019-12-21 10:35 ` Michael Ellerman
2019-12-18 16:23 ` [PATCH v17 02/23] arc: mm: Add p?d_leaf() definitions Steven Price
2019-12-18 16:23 ` [PATCH v17 03/23] arm: " Steven Price
2019-12-18 16:23 ` [PATCH v17 04/23] arm64: " Steven Price
2019-12-18 16:23 ` [PATCH v17 05/23] mips: " Steven Price
2019-12-18 16:23 ` [PATCH v17 06/23] powerpc: " Steven Price
2019-12-19 11:49 ` Michael Ellerman
2019-12-20 11:53 ` Steven Price
2019-12-18 16:23 ` [PATCH v17 07/23] riscv: " Steven Price
2019-12-18 16:23 ` [PATCH v17 08/23] s390: " Steven Price
2019-12-18 16:23 ` [PATCH v17 09/23] sparc: " Steven Price
2019-12-18 16:23 ` [PATCH v17 10/23] x86: " Steven Price
2019-12-18 16:23 ` [PATCH v17 11/23] mm: pagewalk: Add p4d_entry() and pgd_entry() Steven Price
2019-12-19 14:25 ` Thomas Hellström (VMware)
2019-12-20 15:35 ` Steven Price
2019-12-18 16:23 ` [PATCH v17 12/23] mm: pagewalk: Allow walking without vma Steven Price
2019-12-18 16:23 ` [PATCH v17 13/23] mm: pagewalk: Don't lock PTEs for walk_page_range_novma() Steven Price
2019-12-18 16:23 ` [PATCH v17 14/23] mm: pagewalk: fix termination condition in walk_pte_range() Steven Price
2019-12-18 16:23 ` [PATCH v17 15/23] mm: pagewalk: Add 'depth' parameter to pte_hole Steven Price
2019-12-18 16:23 ` [PATCH v17 16/23] x86: mm: Point to struct seq_file from struct pg_state Steven Price
2019-12-18 16:23 ` [PATCH v17 17/23] x86: mm+efi: Convert ptdump_walk_pgd_level() to take a mm_struct Steven Price
2019-12-18 16:23 ` [PATCH v17 18/23] x86: mm: Convert ptdump_walk_pgd_level_debugfs() to take an mm_struct Steven Price
2019-12-18 16:23 ` [PATCH v17 19/23] mm: Add generic ptdump Steven Price
2019-12-18 16:23 ` [PATCH v17 20/23] x86: mm: Convert dump_pagetables to use walk_page_range Steven Price
2019-12-18 16:24 ` [PATCH v17 21/23] arm64: mm: Convert mm/dump.c to use walk_page_range() Steven Price
2020-02-16 16:25 ` Ard Biesheuvel
2020-02-17 10:01 ` Steven Price [this message]
2020-02-17 10:16 ` Ard Biesheuvel
2019-12-18 16:24 ` [PATCH v17 22/23] arm64: mm: Display non-present entries in ptdump Steven Price
2019-12-18 16:24 ` [PATCH v17 23/23] mm: ptdump: Reduce level numbers by 1 in note_page() Steven Price
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