From: linux@arm.linux.org.uk (Russell King - ARM Linux)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH v2 4/6] ARM: mm: LPAE: Correct virt_to_phys patching for 64 bit physical addresses
Date: Sat, 3 Aug 2013 15:09:48 +0100 [thread overview]
Message-ID: <20130803140948.GC23006@n2100.arm.linux.org.uk> (raw)
In-Reply-To: <20130803140544.GB23006@n2100.arm.linux.org.uk>
On Sat, Aug 03, 2013 at 03:05:44PM +0100, Russell King - ARM Linux wrote:
> On Sat, Aug 03, 2013 at 06:17:29PM +0530, Sricharan R wrote:
> > I started with this kind of augmenting with the immediate operand
> > while starting V2. But the problem was, we do the runtime patching twice.
>
> It might be much better to do this only once, and instead of having the
> early code overwrite the page table in use, create a new page table with
> all the correct page table entries in and switch to that.
Note: we still need to do a certain amount of modification of the existing
page table so that we _can_ perform such a switch on all our CPUs - that
is, ensuring that the region for flushing the CPU caches on processors
which need it is properly mapped.
next prev parent reply other threads:[~2013-08-03 14:09 UTC|newest]
Thread overview: 26+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-07-31 16:44 [PATCH v2 0/6] ARM: mm: Extend the runtime patch stub for PAE systems Santosh Shilimkar
2013-07-31 16:44 ` [PATCH v2 1/6] ARM: mm: LPAE: use phys_addr_t appropriately in p2v and v2p conversions Santosh Shilimkar
2013-07-31 16:44 ` [PATCH v2 2/6] ARM: mm: Introduce virt_to_idmap() with an arch hook Santosh Shilimkar
2013-08-03 1:53 ` Nicolas Pitre
2013-08-03 19:03 ` Santosh Shilimkar
2013-07-31 16:44 ` [PATCH v2 3/6] ARM: mm: Move the idmap print to appropriate place in the code Santosh Shilimkar
2013-08-03 1:55 ` Nicolas Pitre
2013-07-31 16:44 ` [PATCH v2 4/6] ARM: mm: LPAE: Correct virt_to_phys patching for 64 bit physical addresses Santosh Shilimkar
2013-07-31 18:31 ` Sricharan R
2013-08-03 3:32 ` Nicolas Pitre
2013-08-03 3:28 ` Nicolas Pitre
2013-08-03 12:47 ` Sricharan R
2013-08-03 14:01 ` Nicolas Pitre
2013-08-03 19:25 ` Santosh Shilimkar
2013-08-04 5:32 ` Nicolas Pitre
2013-08-05 14:38 ` Santosh Shilimkar
2013-08-03 14:05 ` Russell King - ARM Linux
2013-08-03 14:09 ` Russell King - ARM Linux [this message]
2013-08-03 19:15 ` Santosh Shilimkar
2013-08-09 19:37 ` Santosh Shilimkar
2013-07-31 16:44 ` [PATCH v2 5/6] ARM: mm: Update runtime patching code to THUMB2 mode Santosh Shilimkar
2013-08-03 3:40 ` Nicolas Pitre
2013-08-03 12:51 ` Sricharan R
2013-07-31 16:44 ` [PATCH v2 6/6] ARM: mm: Recreate kernel mappings in early_paging_init() Santosh Shilimkar
2013-08-03 1:52 ` [PATCH v2 0/6] ARM: mm: Extend the runtime patch stub for PAE systems Nicolas Pitre
2013-08-03 19:02 ` Santosh Shilimkar
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