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  1. 31 1月, 2009 3 次提交
  3. 30 1月, 2009 8 次提交
  5. 29 1月, 2009 1 次提交
    • N
      [ARM] 5366/1: fix shared memory coherency with VIVT L1 + L2 caches · 08e445bd
      由 Nicolas Pitre 提交于 
      When there are multiple L1-aliasing userland mappings of the same physical
page, we currently remap each of them uncached, to prevent VIVT cache
aliasing issues. (E.g. writes to one of the mappings not being immediately
visible via another mapping.)  However, when we do this remapping, there
could still be stale data in the L2 cache, and an uncached mapping might
bypass L2 and go straight to RAM.  This would cause reads from such
mappings to see old data (until the dirty L2 line is eventually evicted.)

This issue is solved by forcing a L2 cache flush whenever the shared page
is made L1 uncacheable.

Ideally, we would make L1 uncacheable and L2 cacheable as L2 is PIPT. But
Feroceon does not support that combination, and the TEX=5 C=0 B=0 encoding
for XSc3 doesn't appear to work in practice.
Signed-off-by: NNicolas Pitre <nico@marvell.com>
Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>
      08e445bd
  7. 28 1月, 2009 7 次提交
  9. 27 1月, 2009 16 次提交
  11. 26 1月, 2009 5 次提交
    • R
      x86: fix section mismatch warning · 659d2618
      由 Rakib Mullick 提交于 
      Here function vmi_activate calls a init function activate_vmi , which
causes the following section mismatch warnings:

  LD      arch/x86/kernel/built-in.o
WARNING: arch/x86/kernel/built-in.o(.text+0x13ba9): Section mismatch
in reference from the function vmi_activate() to the function
.init.text:vmi_time_init()
The function vmi_activate() references
the function __init vmi_time_init().
This is often because vmi_activate lacks a __init
annotation or the annotation of vmi_time_init is wrong.

WARNING: arch/x86/kernel/built-in.o(.text+0x13bd1): Section mismatch
in reference from the function vmi_activate() to the function
.devinit.text:vmi_time_bsp_init()
The function vmi_activate() references
the function __devinit vmi_time_bsp_init().
This is often because vmi_activate lacks a __devinit
annotation or the annotation of vmi_time_bsp_init is wrong.

WARNING: arch/x86/kernel/built-in.o(.text+0x13bdb): Section mismatch
in reference from the function vmi_activate() to the function
.devinit.text:vmi_time_ap_init()
The function vmi_activate() references
the function __devinit vmi_time_ap_init().
This is often because vmi_activate lacks a __devinit
annotation or the annotation of vmi_time_ap_init is wrong.

Fix it by marking vmi_activate() as __init too.
Signed-off-by: NRakib Mullick <rakib.mullick@gmail.com>
Signed-off-by: NIngo Molnar <mingo@elte.hu>
      659d2618
    • I
      x86: unmask CPUID levels on Intel CPUs, fix · 99fb4d34
      由 Ingo Molnar 提交于 
      Impact: fix boot hang on pre-model-15 Intel CPUs

rdmsrl_safe() does not work in very early bootup code yet, because we
dont have the pagefault handler installed yet so exception section
does not get parsed. rdmsr_safe() will just crash and hang the bootup.

So limit the MSR_IA32_MISC_ENABLE MSR read to those CPU types that
support it.
Signed-off-by: NIngo Molnar <mingo@elte.hu>
      99fb4d34
    • T
      libata-sff: fix incorrect EH message · 80ee6f54
      由 Tejun Heo 提交于 
      The EH message for NODEV_HINT path was describing the opposite
condition.  Fix it.
Signed-off-by: NTejun Heo <tj@kernel.org>
Signed-off-by: NJeff Garzik <jgarzik@redhat.com>
      80ee6f54
    • E
      x86: work around PAGE_KERNEL_WC not getting WC in iomap_atomic_prot_pfn. · ef5fa0ab
      由 Eric Anholt 提交于 
      In the absence of PAT, PAGE_KERNEL_WC ends up mapping to a memory type that
gets UC behavior even in the presence of a WC MTRR covering the area in
question.  By swapping to PAGE_KERNEL_UC_MINUS, we can get the actual
behavior the caller wanted (WC if you can manage it, UC otherwise).

This recovers the 40% performance improvement of using WC in the DRM
to upload vertex data.
Signed-off-by: NEric Anholt <eric@anholt.net>
Signed-off-by: NH. Peter Anvin <hpa@zytor.com>
      ef5fa0ab
    • R
      [ARM] fix section-based ioremap · 24f11ec0
      由 Russell King 提交于 
      Tomi Valkeinen reports:
  Running with latest linux-omap kernel on OMAP3 SDP board, I have
  problem with iounmap(). It looks like iounmap() does not properly
  free large areas. Below is a test which fails for me in 6-7 loops.

	for (i = 0; i < 200; ++i) {
		vaddr = ioremap(paddr, size);
		if (!vaddr) {
			printk("couldn't ioremap\n");
			break;
		}
		iounmap(vaddr);
	}

The changes to vmalloc.c weren't reflected in the ARM ioremap
implementation.  Turns out the fix is rather simple.
Tested-by: NTomi Valkeinen <tomi.valkeinen@nokia.com>
Tested-by: NMatt Gerassimoff <mgeras@gmail.com>
Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>
      24f11ec0