[PATCH 2/8] ARM: Implement read/write for ownership in theARMv6 DMA cache ops

[PATCH 0/8] Various patches for comments and upstream · catalin.marinas@arm.com (Catalin Marinas) · 2010-05-04
[PATCH 1/8] ARM: Improve the L2 cache performance when PL310 is used · catalin.marinas@arm.com (Catalin Marinas) · 2010-05-04
[PATCH 1/8] ARM: Improve the L2 cache performance when PL310 is used · Jason McMullan <hidden> · 2010-05-04
[PATCH 1/8] ARM: Improve the L2 cache performance when PL310 is used · catalin.marinas@arm.com (Catalin Marinas) · 2010-05-05
[PATCH 2/8] ARM: Implement read/write for ownership in the ARMv6 DMA cache ops · catalin.marinas@arm.com (Catalin Marinas) · 2010-05-04
[PATCH 2/8] ARM: Implement read/write for ownership in the ARMv6 DMA cache ops · Jason McMullan <hidden> · 2010-05-04
[PATCH 2/8] ARM: Implement read/write for ownership in the ARMv6 DMA cache ops · catalin.marinas@arm.com (Catalin Marinas) · 2010-05-05
[PATCH 2/8] ARM: Implement read/write for ownership in the ARMv6 DMA cache ops · George G. Davis <hidden> · 2010-05-05
[PATCH 2/8] ARM: Implement read/write for ownership in the ARMv6 DMA cache ops · catalin.marinas@arm.com (Catalin Marinas) · 2010-05-06
[PATCH 2/8] ARM: Implement read/write for ownership in the ARMv6 DMA cache ops · George G. Davis <hidden> · 2010-05-06
[PATCH 2/8] ARM: Implement read/write for ownership in the ARMv6 DMA cache ops · Ronen Shitrit <hidden> · 2010-05-12
[PATCH 2/8] ARM: Implement read/write for ownership in the ARMv6 DMA cache ops · catalin.marinas@arm.com (Catalin Marinas) · 2010-05-12
[PATCH 2/8] ARM: Implement read/write for ownership in the ARMv6 DMA cache ops · Ronen Shitrit <hidden> · 2010-05-12
[PATCH 2/8] ARM: Implement read/write for ownership in the ARMv6 DMA cache ops · Russell King - ARM Linux <hidden> · 2010-05-12
[PATCH 2/8] ARM: Implement read/write for ownership in the ARMv6 DMA cache ops · Russell King - ARM Linux <hidden> · 2010-05-12
[PATCH 2/8] ARM: Implement read/write for ownership in the ARMv6 DMA cache ops · Ronen Shitrit <hidden> · 2010-05-12
[PATCH 2/8] ARM: Implement read/write for ownership in the ARMv6 DMA cache ops · Russell King - ARM Linux <hidden> · 2010-05-12
[PATCH 2/8] ARM: Implement read/write for ownership in the ARMv6 DMA cache ops · Ronen Shitrit <hidden> · 2010-05-12
[PATCH 2/8] ARM: Implement read/write for ownership in theARMv6 DMA cache ops · catalin.marinas@arm.com (Catalin Marinas) · 2010-05-12
[PATCH 2/8] ARM: Implement read/write for ownership in theARMv6 DMA cache ops · Ronen Shitrit <hidden> · 2010-05-13
[PATCH 2/8] ARM: Implement read/write for ownership in theARMv6 DMA cache ops · catalin.marinas@arm.com (Catalin Marinas) · 2010-05-13
[PATCH 2/8] ARM: Implement read/write for ownership in theARMv6 DMA cache ops · George G. Davis <hidden> · 2010-05-13
[PATCH 2/8] ARM: Implement read/write for ownership in theARMv6 DMA cache ops · catalin.marinas@arm.com (Catalin Marinas) · 2010-05-13
[PATCH 2/8] ARM: Implement read/write for ownership in theARMv6 DMA cache ops · George G. Davis <hidden> · 2010-05-13
[PATCH 2/8] ARM: Implement read/write for ownership in theARMv6 DMA cache ops · catalin.marinas@arm.com (Catalin Marinas) · 2010-05-14
[PATCH 2/8] ARM: Implement read/write for ownership in theARMv6 DMA cache ops · catalin.marinas@arm.com (Catalin Marinas) · 2010-05-14
[PATCH 2/8] ARM: Implement read/write for ownership in theARMv6 DMA cache ops · George G. Davis <hidden> · 2010-05-15
[PATCH 2/8] ARM: Implement read/write for ownership in theARMv6 DMA cache ops · Ronen Shitrit <hidden> · 2010-05-16
[PATCH 2/8] ARM: Implement read/write for ownership in theARMv6 DMA cache ops · Ronen Shitrit <hidden> · 2010-05-16
[PATCH 2/8] ARM: Implement read/write for ownership in theARMv6 DMA cache ops · Russell King - ARM Linux <hidden> · 2010-05-16
[PATCH 2/8] ARM: Implement read/write for ownership in theARMv6 DMA cache ops · Ronen Shitrit <hidden> · 2010-05-17
[PATCH 2/8] ARM: Implement read/write for ownership in theARMv6 DMA cache ops · Russell King - ARM Linux <hidden> · 2010-05-17
[PATCH 2/8] ARM: Implement read/write for ownership in theARMv6 DMA cache ops · Ronen Shitrit <hidden> · 2010-05-17
[PATCH 2/8] ARM: Implement read/write for ownership in theARMv6 DMA cache ops · Russell King - ARM Linux <hidden> · 2010-05-17
[PATCH 2/8] ARM: Implement read/write for ownership in theARMv6 DMA cache ops · Ronen Shitrit <hidden> · 2010-05-17
[PATCH 2/8] ARM: Implement read/write for ownership in theARMv6 DMA cache ops · Russell King - ARM Linux <hidden> · 2010-05-17
[PATCH 2/8] ARM: Implement read/write for ownership in theARMv6 DMA cache ops · Ronen Shitrit <hidden> · 2010-05-17
[PATCH 2/8] ARM: Implement read/write for ownership in theARMv6 DMA cache ops · Russell King - ARM Linux <hidden> · 2010-05-17
[PATCH 2/8] ARM: Implement read/write for ownership in theARMv6 DMA cache ops · Ronen Shitrit <hidden> · 2010-05-17
[PATCH 2/8] ARM: Implement read/write for ownership in theARMv6 DMA cache ops · Russell King - ARM Linux <hidden> · 2010-05-17
[PATCH 2/8] ARM: Implement read/write for ownership in theARMv6 DMA cache ops · catalin.marinas@arm.com (Catalin Marinas) · 2010-05-17
[PATCH 2/8] ARM: Implement read/write for ownership in theARMv6 DMA cache ops · catalin.marinas@arm.com (Catalin Marinas) · 2010-05-17
[PATCH 2/8] ARM: Implement read/write for ownership in theARMv6 DMA cache ops · Ronen Shitrit <hidden> · 2010-05-17
[PATCH 2/8] ARM: Implement read/write for ownership in theARMv6 DMA cache ops · catalin.marinas@arm.com (Catalin Marinas) · 2010-05-17
[PATCH 2/8] ARM: Implement read/write for ownership in theARMv6 DMA cache ops · Ronen Shitrit <hidden> · 2010-05-17
[PATCH 2/8] ARM: Implement read/write for ownership in theARMv6 DMA cache ops · catalin.marinas@arm.com (Catalin Marinas) · 2010-05-17
[PATCH 2/8] ARM: Implement read/write for ownership in theARMv6 DMA cache ops · catalin.marinas@arm.com (Catalin Marinas) · 2010-05-17
[PATCH 2/8] ARM: Implement read/write for ownership in theARMv6 DMA cache ops · catalin.marinas@arm.com (Catalin Marinas) · 2010-05-17
[PATCH 2/8] ARM: Implement read/write for ownership in theARMv6 DMA cache ops · Ronen Shitrit <hidden> · 2010-05-17
[PATCH 2/8] ARM: Implement read/write for ownership in theARMv6 DMA cache ops · catalin.marinas@arm.com (Catalin Marinas) · 2010-05-17
[PATCH 2/8] ARM: Implement read/write for ownership in theARMv6 DMA cache ops · Ronen Shitrit <hidden> · 2010-05-17
[PATCH 2/8] ARM: Implement read/write for ownership in theARMv6 DMA cache ops · catalin.marinas@arm.com (Catalin Marinas) · 2010-05-17
[PATCH 2/8] ARM: Implement read/write for ownership intheARMv6 DMA cache ops · catalin.marinas@arm.com (Catalin Marinas) · 2010-05-17
[PATCH 3/8] ARM: Align machine_desc.phys_io to a 1MB section · catalin.marinas@arm.com (Catalin Marinas) · 2010-05-04
[PATCH 4/8] ARM: Remove the domain switching on ARMv6k/v7 CPUs · catalin.marinas@arm.com (Catalin Marinas) · 2010-05-04
[PATCH 5/8] ARM: Fix the __arm_ioremap_caller() definition in nommu.c · catalin.marinas@arm.com (Catalin Marinas) · 2010-05-04
[PATCH 5/8] ARM: Fix the __arm_ioremap_caller() definition in nommu.c · Russell King - ARM Linux <hidden> · 2010-05-04
[PATCH 6/8] ARM: Implement copy_to_user_page() for noMMU · catalin.marinas@arm.com (Catalin Marinas) · 2010-05-04
[PATCH 6/8] ARM: Implement copy_to_user_page() for noMMU · Russell King - ARM Linux <hidden> · 2010-05-04
[PATCH 7/8] ARM: Use the Inner Shareable I-cache and BTB ops on ARMv7 SMP · catalin.marinas@arm.com (Catalin Marinas) · 2010-05-04
[PATCH 7/8] ARM: Use the Inner Shareable I-cache and BTB ops on ARMv7 SMP · Russell King - ARM Linux <hidden> · 2010-05-28
[PATCH 7/8] ARM: Use the Inner Shareable I-cache and BTB opson ARMv7 SMP · catalin.marinas@arm.com (Catalin Marinas) · 2010-05-28
[PATCH 8/8] ARM: Implement phys_mem_access_prot() to avoid attributes aliasing · catalin.marinas@arm.com (Catalin Marinas) · 2010-05-04
[PATCH 0/8] Various patches for comments and upstream · catalin.marinas@arm.com (Catalin Marinas) · 2010-05-04

STALE5872d

From: Russell King - ARM Linux <hidden>
Date: 2010-05-16 15:01:17

On Sun, May 16, 2010 at 09:29:47AM +0300, Ronen Shitrit wrote:

Our ARMv6 do speculative rd for both I and D cache...

That means doing this read-write for ownership trick can lead to
corrupted data on your CPU, since the CPU may prefetch data from
the DMA buffer before the unmap has happened.

This means Catalin's patch is unsafe for your situation.

`h`	back out one level
`j`	next message in thread
`k`	previous message in thread
`l`	drill in
`Esc`	close help / fold thread tree
`?`	toggle this help