From: Andrey Konovalov <andreyknvl@google.com>
To: Mark Rutland <mark.rutland@arm.com>
Cc: Andrey Ryabinin <aryabinin@virtuozzo.com>,
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Subject: Re: [RFC PATCH 06/14] khwasan: enable top byte ignore for the kernel
Date: Fri, 9 Mar 2018 19:15:29 +0100 [thread overview]
Message-ID: <CAAeHK+x1JgQQouoYEeLO8tASwcxck1eKrRcWJqqrjD4xTV148w@mail.gmail.com> (raw)
In-Reply-To: <20180305142907.uvrvwmtfl7o45myf@lakrids.cambridge.arm.com>
On Mon, Mar 5, 2018 at 3:29 PM, Mark Rutland <mark.rutland@arm.com> wrote:
> On Fri, Mar 02, 2018 at 08:44:25PM +0100, Andrey Konovalov wrote:
>> +#ifdef CONFIG_KASAN_TAGS
>> +#define TCR_TBI_FLAGS (TCR_TBI0 | TCR_TBI1)
>> +#else
>> +#define TCR_TBI_FLAGS TCR_TBI0
>> +#endif
>
> Rather than pulling TBI0 into this, I think it'd make more sense to
> have:
>
> #ifdef CONFIG_KASAN_TAGS
> #define KASAN_TCR_FLAGS TCR_TBI1
> #else
> #define KASAN_TCR_FLAGS
> #endif
>
>> +
>> #define MAIR(attr, mt) ((attr) << ((mt) * 8))
>>
>> /*
>> @@ -432,7 +438,7 @@ ENTRY(__cpu_setup)
>> * both user and kernel.
>> */
>> ldr x10, =TCR_TxSZ(VA_BITS) | TCR_CACHE_FLAGS | TCR_SMP_FLAGS | \
>> - TCR_TG_FLAGS | TCR_ASID16 | TCR_TBI0 | TCR_A1
>> + TCR_TG_FLAGS | TCR_ASID16 | TCR_TBI_FLAGS | TCR_A1
>
> ... and just append KASAN_TCR_FLAGS to the flags here.
>
> That's roughtly what we do with ENDIAN_SET_EL1 for SCTLR_EL1.
>
OK, will do!
next prev parent reply other threads:[~2018-03-09 18:15 UTC|newest]
Thread overview: 65+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-03-02 19:44 [RFC PATCH 00/14] khwasan: kernel hardware assisted address sanitizer Andrey Konovalov
2018-03-02 19:44 ` [RFC PATCH 01/14] khwasan: change kasan hooks signatures Andrey Konovalov
2018-03-02 19:44 ` [RFC PATCH 02/14] khwasan: move common kasan and khwasan code to common.c Andrey Konovalov
2018-03-02 19:44 ` [RFC PATCH 03/14] khwasan: add CONFIG_KASAN_CLASSIC and CONFIG_KASAN_TAGS Andrey Konovalov
2018-03-02 19:44 ` [RFC PATCH 04/14] khwasan: adjust shadow size for CONFIG_KASAN_TAGS Andrey Konovalov
2018-03-02 19:44 ` [RFC PATCH 05/14] khwasan: initialize shadow to 0xff Andrey Konovalov
2018-03-02 21:55 ` Evgenii Stepanov
2018-03-02 19:44 ` [RFC PATCH 06/14] khwasan: enable top byte ignore for the kernel Andrey Konovalov
2018-03-05 14:29 ` Mark Rutland
2018-03-09 18:15 ` Andrey Konovalov [this message]
2018-03-05 14:36 ` Mark Rutland
2018-03-06 14:24 ` Marc Zyngier
2018-03-09 18:21 ` Andrey Konovalov
2018-03-09 18:32 ` Marc Zyngier
2018-03-09 18:42 ` Andrey Konovalov
2018-03-09 19:06 ` Marc Zyngier
2018-03-09 19:16 ` Mark Rutland
2018-03-09 19:14 ` Mark Rutland
2018-03-09 18:17 ` Andrey Konovalov
2018-03-09 18:59 ` Mark Rutland
2018-03-02 19:44 ` [RFC PATCH 07/14] khwasan: add tag related helper functions Andrey Konovalov
2018-03-05 14:32 ` Mark Rutland
2018-03-06 18:31 ` Andrey Konovalov
2018-03-07 18:16 ` Christopher Lameter
2018-03-08 9:09 ` Dmitry Vyukov
2018-03-08 11:20 ` Mark Rutland
2018-03-02 19:44 ` [RFC PATCH 08/14] khwasan: perform untagged pointers comparison in krealloc Andrey Konovalov
2018-03-05 14:39 ` Mark Rutland
2018-03-06 18:33 ` Andrey Konovalov
2018-03-02 19:44 ` [RFC PATCH 09/14] khwasan: add hooks implementation Andrey Konovalov
2018-03-05 14:44 ` Mark Rutland
2018-03-06 18:38 ` Andrey Konovalov
2018-03-08 11:25 ` Mark Rutland
2018-03-09 18:10 ` Andrey Konovalov
2018-03-13 15:05 ` Alexander Potapenko
2018-03-13 17:00 ` Andrey Konovalov
2018-03-15 16:52 ` Andrey Ryabinin
2018-03-16 18:09 ` Andrey Konovalov
2018-03-16 18:16 ` Evgenii Stepanov
2018-03-16 18:24 ` Andrey Konovalov
2018-03-16 18:45 ` Evgenii Stepanov
2018-03-16 19:06 ` Andrey Konovalov
2018-03-16 20:21 ` Evgenii Stepanov
2018-03-20 0:44 ` Anthony Yznaga
2018-03-20 13:43 ` Andrey Konovalov
2018-03-02 19:44 ` [RFC PATCH 10/14] khwasan: add bug reporting routines Andrey Konovalov
2018-03-02 19:44 ` [RFC PATCH 11/14] khwasan: add brk handler for inline instrumentation Andrey Konovalov
2018-03-05 14:51 ` Mark Rutland
2018-03-23 15:59 ` Andrey Konovalov
2018-03-24 3:42 ` Ard Biesheuvel
2018-03-26 9:36 ` Mark Rutland
2018-03-27 13:03 ` Andrey Konovalov
2018-03-02 19:44 ` [RFC PATCH 12/14] khwasan, jbd2: add khwasan annotations Andrey Konovalov
2018-03-02 19:44 ` [RFC PATCH 13/14] khwasan: update kasan documentation Andrey Konovalov
2018-03-02 19:44 ` [RFC PATCH 14/14] khwasan: default the instrumentation mode to inline Andrey Konovalov
2018-03-05 14:54 ` Mark Rutland
2018-03-09 18:06 ` Andrey Konovalov
2018-03-09 19:18 ` Mark Rutland
2018-03-12 13:10 ` Andrey Konovalov
2018-03-13 14:44 ` Alexander Potapenko
2018-03-13 16:49 ` Andrey Konovalov
2018-03-04 9:16 ` [RFC PATCH 00/14] khwasan: kernel hardware assisted address sanitizer Geert Uytterhoeven
2018-03-04 11:44 ` Ingo Molnar
2018-03-04 15:49 ` Geert Uytterhoeven
2018-03-06 18:21 ` Andrey Konovalov
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