From: catalin.marinas@arm•com (Catalin Marinas)
To: linux-arm-kernel@lists•infradead.org
Subject: [PATCH 00/22] Introducing the TI Keystone platform
Date: Wed, 8 Aug 2012 16:43:18 +0100 [thread overview]
Message-ID: <20120808154318.GE8444@arm.com> (raw)
In-Reply-To: <501E8CEA.9050601@ti.com>
On Sun, Aug 05, 2012 at 04:10:34PM +0100, Cyril Chemparathy wrote:
> On 8/4/2012 4:39 AM, Russell King - ARM Linux wrote:
> > On Tue, Jul 31, 2012 at 07:04:36PM -0400, Cyril Chemparathy wrote:
> >> This series is a follow on to the RFC series posted earlier (archived at [1]).
> >> The major change introduced here is the modification to the kernel patching
> >> mechanism for phys_to_virt/virt_to_phys, in order to support LPAE platforms
> >> that require late patching. In addition to these changes, we've updated the
> >> series based on feedback from the earlier posting.
> >>
> >> Most of the patches in this series are fixes and extensions to LPAE support on
> >> ARM. The last three patches in this series are specific to the TI Keystone
> >> platform, and are being provided here for the sake of completeness. These
> >> three patches are dependent on the smpops patch set (see [2]), and are not
> >> ready to be merged in as yet.
> >
> > Can you explain why you want the kernel loaded above the 4GB watermark?
> > This seems silly to me, as the kernel needs to run at points with a 1:1
> > physical to virtual mapping, and you can't do that if the kernel is
> > stored in physical memory above the 4GB watermark.
[...]
> We are well aware of the fact that we are barely scratching the surface
> of the problem space here, and we'd be very thankful for a heads up on
> issues that we may have missed so far.
Another thing to be aware is that apart from a virtual alias between the
kernel mapping and the idmap, you now introduce a physical alias as well
and the caches (physically tagged) get confused.
--
Catalin
next prev parent reply other threads:[~2012-08-08 15:43 UTC|newest]
Thread overview: 64+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-07-31 23:04 [PATCH 00/22] Introducing the TI Keystone platform Cyril Chemparathy
2012-07-31 23:04 ` [PATCH 01/22] ARM: add mechanism for late code patching Cyril Chemparathy
2012-08-04 5:38 ` Nicolas Pitre
2012-08-05 13:56 ` Cyril Chemparathy
2012-08-07 22:52 ` Cyril Chemparathy
2012-08-08 5:56 ` Nicolas Pitre
2012-08-08 13:18 ` Cyril Chemparathy
2012-08-08 13:55 ` Nicolas Pitre
2012-08-08 16:05 ` Russell King - ARM Linux
2012-08-08 16:56 ` Nicolas Pitre
2012-08-09 6:59 ` Tixy
2012-08-06 11:12 ` Russell King - ARM Linux
2012-08-06 13:19 ` Cyril Chemparathy
2012-08-06 13:26 ` Russell King - ARM Linux
2012-08-06 13:38 ` Cyril Chemparathy
2012-08-06 18:02 ` Nicolas Pitre
2012-07-31 23:04 ` [PATCH 02/22] ARM: use late patch framework for phys-virt patching Cyril Chemparathy
2012-08-04 6:15 ` Nicolas Pitre
2012-08-05 14:03 ` Cyril Chemparathy
2012-08-06 2:06 ` Nicolas Pitre
2012-07-31 23:04 ` [PATCH 03/22] ARM: LPAE: use phys_addr_t on virt <--> phys conversion Cyril Chemparathy
2012-08-04 6:24 ` Nicolas Pitre
2012-08-05 14:05 ` Cyril Chemparathy
2012-08-06 11:14 ` Russell King - ARM Linux
2012-08-06 13:30 ` Cyril Chemparathy
2012-08-09 14:10 ` Cyril Chemparathy
2012-07-31 23:04 ` [PATCH 04/22] ARM: LPAE: support 64-bit virt/phys patching Cyril Chemparathy
2012-08-04 6:49 ` Nicolas Pitre
2012-08-05 14:21 ` Cyril Chemparathy
2012-08-06 2:19 ` Nicolas Pitre
2012-07-31 23:04 ` [PATCH 05/22] ARM: LPAE: use signed arithmetic for mask definitions Cyril Chemparathy
2012-07-31 23:04 ` [PATCH 06/22] ARM: LPAE: use phys_addr_t in alloc_init_pud() Cyril Chemparathy
2012-08-01 12:08 ` Sergei Shtylyov
2012-08-01 15:42 ` Cyril Chemparathy
2012-08-04 6:51 ` Nicolas Pitre
2012-07-31 23:04 ` [PATCH 07/22] ARM: LPAE: use phys_addr_t in free_memmap() Cyril Chemparathy
2012-08-04 6:54 ` Nicolas Pitre
2012-07-31 23:04 ` [PATCH 08/22] ARM: LPAE: use phys_addr_t for initrd location and size Cyril Chemparathy
2012-08-04 6:57 ` Nicolas Pitre
2012-08-05 14:23 ` Cyril Chemparathy
2012-07-31 23:04 ` [PATCH 09/22] ARM: LPAE: use 64-bit pgd physical address in switch_mm() Cyril Chemparathy
2012-08-04 7:04 ` Nicolas Pitre
2012-08-05 14:29 ` Cyril Chemparathy
2012-08-06 2:35 ` Nicolas Pitre
2012-07-31 23:04 ` [PATCH 10/22] ARM: LPAE: use 64-bit accessors for TTBR registers Cyril Chemparathy
2012-07-31 23:04 ` [PATCH 11/22] ARM: LPAE: define ARCH_LOW_ADDRESS_LIMIT for bootmem Cyril Chemparathy
2012-07-31 23:04 ` [PATCH 12/22] ARM: LPAE: factor out T1SZ and TTBR1 computations Cyril Chemparathy
2012-07-31 23:04 ` [PATCH 13/22] ARM: LPAE: allow proc override of TTB setup Cyril Chemparathy
2012-07-31 23:04 ` [PATCH 14/22] ARM: LPAE: accomodate >32-bit addresses for page table base Cyril Chemparathy
2012-07-31 23:04 ` [PATCH 15/22] ARM: mm: use physical addresses in highmem sanity checks Cyril Chemparathy
2012-07-31 23:04 ` [PATCH 16/22] ARM: mm: cleanup checks for membank overlap with vmalloc area Cyril Chemparathy
2012-07-31 23:04 ` [PATCH 17/22] ARM: mm: clean up membank size limit checks Cyril Chemparathy
2012-07-31 23:04 ` [PATCH 18/22] ARM: add virt_to_idmap for interconnect aliasing Cyril Chemparathy
2012-07-31 23:04 ` [PATCH 19/22] ARM: recreate kernel mappings in early_paging_init() Cyril Chemparathy
2012-07-31 23:05 ` [RFC 21/22] ARM: keystone: enable SMP on Keystone machines Cyril Chemparathy
2012-07-31 23:05 ` [RFC 22/22] ARM: keystone: add switch over to high physical address range Cyril Chemparathy
2012-07-31 23:06 ` [RFC 20/22] ARM: keystone: introducing TI Keystone platform Cyril Chemparathy
2012-07-31 23:16 ` Arnd Bergmann
2012-08-01 15:41 ` Cyril Chemparathy
2012-08-01 17:20 ` Arnd Bergmann
2012-08-04 8:39 ` [PATCH 00/22] Introducing the " Russell King - ARM Linux
2012-08-05 15:10 ` Cyril Chemparathy
2012-08-08 15:43 ` Catalin Marinas [this message]
2012-08-08 13:57 ` Will Deacon
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