From: a.ryabinin@samsung.com (Andrey Ryabinin)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH v2 5/5] arm64: add KASan support
Date: Fri, 17 Jul 2015 16:13:07 +0300 [thread overview]
Message-ID: <55A8FF63.70505@samsung.com> (raw)
In-Reply-To: <20150716160313.GC26865@e104818-lin.cambridge.arm.com>
On 07/16/2015 07:03 PM, Catalin Marinas wrote:
> On Thu, Jul 16, 2015 at 06:30:11PM +0300, Andrey Ryabinin wrote:
>>
>> I think this may work, if pud_none(*pud) will be replaced with !pud_val(*pud).
>> We can't use pud_none() because with 2-level page tables it's always false, so
>> we will never go down to pmd level where swapper_pg_dir populated.
>
> The reason I used "do ... while" vs "while" or "for" is so that it gets
> down to the pmd level. The iteration over pgd is always done in the top
> loop via pgd_addr_end while the loops for missing levels (nopud, nopmd)
> are always a single iteration whether we check for pud_none or not. But
> when the level is present, we avoid looping when !pud_none().
>
Right, dunno what I was thinking.
It seems to work. Lightly tested with every possible CONFIG_PGTABLE_LEVELS.
prev parent reply other threads:[~2015-07-17 13:13 UTC|newest]
Thread overview: 42+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-05-15 13:58 [PATCH v2 0/5] KASan for arm64 Andrey Ryabinin
2015-05-15 13:59 ` [PATCH v2 1/5] kasan, x86: move KASAN_SHADOW_OFFSET to the arch Kconfig Andrey Ryabinin
2015-05-16 11:27 ` Paul Bolle
2015-05-18 7:43 ` Andrey Ryabinin
2015-05-18 8:34 ` Paul Bolle
2015-05-15 13:59 ` [PATCH v2 2/5] x86: kasan: fix types in kasan page tables declarations Andrey Ryabinin
2015-05-15 13:59 ` [PATCH v2 3/5] x86: kasan: generalize populate_zero_shadow() code Andrey Ryabinin
2015-05-15 13:59 ` [PATCH v2 4/5] kasan, x86: move populate_zero_shadow() out of arch directory Andrey Ryabinin
2015-05-15 13:59 ` [PATCH v2 5/5] arm64: add KASan support Andrey Ryabinin
2015-05-26 13:35 ` Linus Walleij
2015-05-26 14:12 ` Andrey Ryabinin
2015-05-26 14:22 ` Andrey Ryabinin
2015-05-26 20:28 ` Linus Walleij
2015-05-27 12:40 ` Linus Walleij
2015-06-11 13:39 ` Linus Walleij
2015-06-12 18:14 ` Andrey Ryabinin
2015-06-13 15:25 ` Linus Walleij
2015-06-17 21:32 ` Andrey Ryabinin
2015-07-21 10:36 ` Linus Walleij
2015-07-21 14:27 ` Andrey Ryabinin
2015-07-21 21:27 ` Linus Walleij
2015-07-22 17:54 ` Andrey Ryabinin
2015-08-19 12:14 ` Linus Walleij
2015-08-19 14:51 ` Andrey Ryabinin
2015-08-24 13:02 ` Linus Walleij
2015-08-24 13:15 ` Russell King - ARM Linux
2015-08-24 13:45 ` Linus Walleij
2015-08-24 14:15 ` Andrey Ryabinin
2015-08-24 15:44 ` Vladimir Murzin
2015-08-24 16:00 ` Andrey Ryabinin
2015-08-24 16:16 ` Vladimir Murzin
2015-08-24 16:18 ` Andrey Ryabinin
2015-08-24 17:47 ` Russell King - ARM Linux
2015-08-25 9:15 ` Will Deacon
2015-07-08 15:48 ` Catalin Marinas
2015-07-10 17:11 ` Andrey Ryabinin
2015-07-14 15:04 ` Catalin Marinas
2015-07-15 8:55 ` Andrey Ryabinin
2015-07-15 16:37 ` Catalin Marinas
2015-07-16 15:30 ` Andrey Ryabinin
2015-07-16 16:03 ` Catalin Marinas
2015-07-17 13:13 ` Andrey Ryabinin [this message]
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