From: santosh.shilimkar@ti.com (Santosh Shilimkar)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH v3 6/6] ARM: mm: Change the order of TLB/cache maintenance operations.
Date: Fri, 4 Oct 2013 09:19:36 -0400 [thread overview]
Message-ID: <524EC068.1060105@ti.com> (raw)
In-Reply-To: <alpine.LFD.2.03.1310040911240.3023@syhkavp.arg>
On Friday 04 October 2013 09:14 AM, Nicolas Pitre wrote:
> On Fri, 4 Oct 2013, Russell King - ARM Linux wrote:
>
>> On Thu, Oct 03, 2013 at 05:18:00PM -0400, Santosh Shilimkar wrote:
>>> From: Sricharan R <r.sricharan@ti.com>
>>>
>>> As per the arm ARMv7 manual, the sequence of TLB maintenance
>>> operations after making changes to the translation table is
>>> to clean the dcache first, then invalidate the TLB. With
>>> the current sequence we see cache corruption when the
>>> flush_cache_all is called after tlb_flush_all.
>>
>> This needs testing on ARMv4 CPUs which don't have a way to flush the
>> cache except by reading memory - hence they need the new page table
>> entries to be visible to the MMU before calling flush_cache_all().
>
> I suspect you might be one of the few individuals still having the
> ability to test new kernels on ARMv4 CPUs.
>
At least I don't have any ARMv4 based system to validate it.
Regards,
Santosh
next prev parent reply other threads:[~2013-10-04 13:19 UTC|newest]
Thread overview: 28+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-10-03 21:17 [PATCH v3 0/6] ARM: mm: Extend the runtime patch stub for PAE systems Santosh Shilimkar
2013-10-03 21:17 ` [PATCH v3 1/6] ARM: mm: use phys_addr_t appropriately in p2v and v2p conversions Santosh Shilimkar
2013-10-03 21:17 ` [PATCH v3 2/6] ARM: mm: Introduce virt_to_idmap() with an arch hook Santosh Shilimkar
2013-10-03 21:17 ` [PATCH v3 3/6] ARM: mm: Move the idmap print to appropriate place in the code Santosh Shilimkar
2013-10-03 21:17 ` [PATCH v3 4/6] ARM: mm: Correct virt_to_phys patching for 64 bit physical addresses Santosh Shilimkar
2013-10-04 0:17 ` Nicolas Pitre
2013-10-04 5:37 ` Sricharan R
2013-10-04 13:02 ` Nicolas Pitre
2013-10-07 19:25 ` Santosh Shilimkar
2013-10-07 19:42 ` Nicolas Pitre
2013-10-08 11:43 ` Sricharan R
2013-10-03 21:17 ` [PATCH v3 5/6] ARM: mm: Recreate kernel mappings in early_paging_init() Santosh Shilimkar
2013-10-04 0:23 ` Nicolas Pitre
2013-10-04 15:59 ` Will Deacon
2013-10-04 16:12 ` Santosh Shilimkar
2013-10-07 19:34 ` Santosh Shilimkar
2013-10-08 10:26 ` Will Deacon
2013-10-08 17:45 ` Santosh Shilimkar
2013-10-09 10:06 ` Will Deacon
2013-10-09 18:51 ` Santosh Shilimkar
2013-10-03 21:18 ` [PATCH v3 6/6] ARM: mm: Change the order of TLB/cache maintenance operations Santosh Shilimkar
2013-10-04 0:25 ` Nicolas Pitre
2013-10-04 8:46 ` Russell King - ARM Linux
2013-10-04 13:14 ` Nicolas Pitre
2013-10-04 13:19 ` Santosh Shilimkar [this message]
2013-10-04 15:52 ` Will Deacon
2013-10-04 16:03 ` Santosh Shilimkar
2013-10-09 18:56 ` Santosh Shilimkar
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=524EC068.1060105@ti.com \
--to=santosh.shilimkar@ti.com \
--cc=linux-arm-kernel@lists.infradead.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.