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  1. 06 5月, 2011 1 次提交
  3. 04 5月, 2011 3 次提交
  5. 27 4月, 2011 3 次提交
  7. 20 4月, 2011 3 次提交
  9. 05 4月, 2011 1 次提交
  11. 31 3月, 2011 1 次提交
  13. 30 3月, 2011 1 次提交
  15. 10 3月, 2011 1 次提交
  17. 02 3月, 2011 2 次提交
  19. 07 2月, 2011 8 次提交
  21. 02 2月, 2011 1 次提交
  23. 14 1月, 2011 1 次提交
  25. 12 1月, 2011 1 次提交
  27. 11 1月, 2011 1 次提交
    • J
      powerpc/pseries: Fix VPHN build errors on non-SMP systems · 39bf990e
      由 Jesse Larrew 提交于 
      The header asm/hvcall.h was previously included indirectly via
smp.h. On non-SMP systems, however, these declarations are excluded
and the build breaks. This is easily fixed by including asm/hvcall.h
directly.

The VPHN feature is only meaningful on NUMA systems that implement
the SPLPAR option, so exclude the VPHN code on systems without
SPLPAR enabled.

Also, expose unmap_cpu_from_node() on systems with SPLPAR enabled,
even if CONFIG_HOTPLUG_CPU is disabled.

Lastly, map_cpu_to_node() is now needed by VPHN to manipulate the
node masks after boot time, so remove the __cpuinit annotation to
fix a section mismatch.
Signed-off-by: NJesse Larrew <jlarrew@linux.vnet.ibm.com>
      39bf990e
  29. 09 12月, 2010 3 次提交
  31. 30 11月, 2010 1 次提交
  33. 29 11月, 2010 3 次提交
    • M
      powerpc/mm: Avoid avoidable void* pointer · 0b97fee0
      由 Michael Neuling 提交于 
      Change pgdir from a void to real type.  Having this as a void is
stupid and has already caused 1 bug.
Signed-off-by: NMichael Neuling <mikey@neuling.org>
Signed-off-by: NBenjamin Herrenschmidt <benh@kernel.crashing.org>
      0b97fee0
    • N
      powerpc: Add memory_hotplug_max() · cd34206e
      由 Nishanth Aravamudan 提交于 
      Add a function to get the maximum address that can be hotplug added.
This is needed to calculate the size of the tce table needed to cover
all memory in 1:1 mode.
Signed-off-by: NMilton Miller <miltonm@bga.com>
Signed-off-by: NNishanth Aravamudan <nacc@us.ibm.com>
Signed-off-by: NBenjamin Herrenschmidt <benh@kernel.crashing.org>
      cd34206e
    • V
      powerpc: Cleanup APIs for cpu/thread/core mappings · 99d86705
      由 Vaidyanathan Srinivasan 提交于 
      These APIs take logical cpu number as input
Change cpu_first_thread_in_core() to cpu_first_thread_sibling()
Change cpu_last_thread_in_core() to cpu_last_thread_sibling()

These APIs convert core number (index) to logical cpu/thread numbers
Add cpu_first_thread_of_core(int core)
Changed cpu_thread_to_core() to cpu_core_index_of_thread(int cpu)

The goal is to make 'threads_per_core' accessible to the
pseries_energy module.  Instead of making an API to read
threads_per_core, this is a higher level wrapper function to
convert from logical cpu number to core number.

The current APIs cpu_first_thread_in_core() and
cpu_last_thread_in_core() returns logical CPU number while
cpu_thread_to_core() returns core number or index which is
not a logical CPU number.  The new APIs are now clearly named to
distinguish 'core number' versus first and last 'logical cpu
number' in that core.

The new APIs cpu_{first,last}_thread_sibling() work on
logical cpu numbers.  While cpu_first_thread_of_core() and
cpu_core_index_of_thread() work on core index.

Example usage:  (4 threads per core system)

cpu_first_thread_sibling(5) = 4
cpu_last_thread_sibling(5) = 7
cpu_core_index_of_thread(5) = 1
cpu_first_thread_of_core(1) = 4

cpu_core_index_of_thread() is used in cpu_to_drc_index() in the
module and cpu_first_thread_of_core() is used in
drc_index_to_cpu() in the module.

Make API changes to few callers.  Export symbols for use in modules.
Signed-off-by: NVaidyanathan Srinivasan <svaidy@linux.vnet.ibm.com>
Signed-off-by: NBenjamin Herrenschmidt <benh@kernel.crashing.org>
      99d86705
  35. 18 11月, 2010 3 次提交
    • K
      powerpc/mm: Fix module instruction tlb fault handling on Book-E 64 · 82ae5eaf
      由 Kumar Gala 提交于 
      We were seeing oops like the following when we did an rmmod on a module:

Unable to handle kernel paging request for instruction fetch
Faulting instruction address: 0x8000000000008010
Oops: Kernel access of bad area, sig: 11 [#1]
SMP NR_CPUS=2 P5020 DS
last sysfs file: /sys/devices/qman-portals.2/qman-pool.9/uevent
Modules linked in: qman_tester(-)
NIP: 8000000000008010 LR: c000000000074858 CTR: 8000000000008010
REGS: c00000002e29bab0 TRAP: 0400   Not tainted
(2.6.34.6-00744-g2d21f14)
MSR: 0000000080029000 <EE,ME,CE>  CR: 24000448  XER: 00000000
TASK = c00000007a8be600[4987] 'rmmod' THREAD: c00000002e298000 CPU: 1
GPR00: 8000000000008010 c00000002e29bd30 8000000000012798 c00000000035fb28
GPR04: 0000000000000002 0000000000000002 0000000024022428 c000000000009108
GPR08: fffffffffffffffe 800000000000a618 c0000000003c13c8 0000000000000000
GPR12: 0000000022000444 c00000000fffed00 0000000000000000 0000000000000000
GPR16: 00000000100c0000 0000000000000000 00000000100dabc8 0000000010099688
GPR20: 0000000000000000 00000000100cfc28 0000000000000000 0000000010011a44
GPR24: 00000000100017b2 0000000000000000 0000000000000000 0000000000000880
GPR28: c00000000035fb28 800000000000a7b8 c000000000376d80 c0000000003cce50
NIP [8000000000008010] .test_exit+0x0/0x10 [qman_tester]
LR [c000000000074858] .SyS_delete_module+0x1f8/0x2f0
Call Trace:
[c00000002e29bd30] [c0000000000748b4] .SyS_delete_module+0x254/0x2f0 (unreliable)
[c00000002e29be30] [c000000000000580] syscall_exit+0x0/0x2c
Instruction dump:
XXXXXXXX XXXXXXXX XXXXXXXX XXXXXXXX XXXXXXXX XXXXXXXX XXXXXXXX XXXXXXXX
38600000 4e800020 60000000 60000000 <4e800020> 60000000 60000000 60000000
---[ end trace 4f57124939a84dc8 ]---

This appears to be due to checking the wrong permission bits in the
instruction_tlb_miss handling if the address that faulted was in vmalloc
space.  We need to look at the supervisor execute (_PAGE_BAP_SX) bit and
not the user bit (_PAGE_BAP_UX/_PAGE_EXEC).

Also removed a branch level since it did not appear to be used.
Reported-by: NJeffrey Ladouceur <Jeffrey.Ladouceur@freescale.com>
Signed-off-by: NKumar Gala <galak@kernel.crashing.org>
Signed-off-by: NBenjamin Herrenschmidt <benh@kernel.crashing.org>
      82ae5eaf
    • M
      powerpc: Fix call to subpage_protection() · 1c2c25c7
      由 Michael Neuling 提交于 
      In:
  powerpc/mm: Fix pgtable cache cleanup with CONFIG_PPC_SUBPAGE_PROT
  commit d28513bc
  Author: David Gibson <david@gibson.dropbear.id.au>

subpage_protection() was changed to to take an mm rather a pgdir but it
didn't change calling site in hashpage_preload().  The change wasn't
noticed at compile time since hashpage_preload() used a void* as the
parameter to subpage_protection().

This is obviously wrong and can trigger the following crash when
CONFIG_SLAB, CONFIG_DEBUG_SLAB, CONFIG_PPC_64K_PAGES
CONFIG_PPC_SUBPAGE_PROT are enabled.

Freeing unused kernel memory: 704k freed
Unable to handle kernel paging request for data at address 0x6b6b6b6b6b6c49b7
Faulting instruction address: 0xc0000000000410f4
cpu 0x2: Vector: 300 (Data Access) at [c00000004233f590]
    pc: c0000000000410f4: .hash_preload+0x258/0x338
    lr: c000000000041054: .hash_preload+0x1b8/0x338
    sp: c00000004233f810
   msr: 8000000000009032
   dar: 6b6b6b6b6b6c49b7
 dsisr: 40000000
  current = 0xc00000007e2c0070
  paca    = 0xc000000007fe0500
    pid   = 1, comm = init
enter ? for help
[c00000004233f810] c000000000041020 .hash_preload+0x184/0x338 (unreliable)
[c00000004233f8f0] c00000000003ed98 .update_mmu_cache+0xb0/0xd0
[c00000004233f990] c000000000157754 .__do_fault+0x48c/0x5dc
[c00000004233faa0] c000000000158fd0 .handle_mm_fault+0x508/0xa8c
[c00000004233fb90] c0000000006acdd4 .do_page_fault+0x428/0x6ac
[c00000004233fe30] c000000000005260 handle_page_fault+0x20/0x74
Signed-off-by: NBenjamin Herrenschmidt <benh@kernel.crashing.org>
      1c2c25c7
    • K
      powerpc/mm: Fix build error in setup_initial_memory_limit · 4a89261b
      由 Kumar Gala 提交于 
      arch/powerpc/mm/tlb_nohash.c: In function 'setup_initial_memory_limit':
arch/powerpc/mm/tlb_nohash.c:588:29: error: 'ppc64_memblock_base' undeclared (first use in this function)
arch/powerpc/mm/tlb_nohash.c:588:29: note: each undeclared identifier is reported only once for each function it appears in

Due to a copy/paste typo with the following commit:

	commit cd3db0c4
	Author: Benjamin Herrenschmidt <benh@kernel.crashing.org>
	Date:   Tue Jul 6 15:39:02 2010 -0700

	    memblock: Remove rmo_size, burry it in arch/powerpc where it belongs
Signed-off-by: NKumar Gala <galak@kernel.crashing.org>
Signed-off-by: NBenjamin Herrenschmidt <benh@kernel.crashing.org>
      4a89261b
  37. 28 10月, 2010 1 次提交
  39. 27 10月, 2010 1 次提交
    • P
      mm: stack based kmap_atomic() · 3e4d3af5
      由 Peter Zijlstra 提交于 
      Keep the current interface but ignore the KM_type and use a stack based
approach.

The advantage is that we get rid of crappy code like:

	#define __KM_PTE			\
		(in_nmi() ? KM_NMI_PTE : 	\
		 in_irq() ? KM_IRQ_PTE :	\
		 KM_PTE0)

and in general can stop worrying about what context we're in and what kmap
slots might be appropriate for that.

The downside is that FRV kmap_atomic() gets more expensive.

For now we use a CPP trick suggested by Andrew:

  #define kmap_atomic(page, args...) __kmap_atomic(page)

to avoid having to touch all kmap_atomic() users in a single patch.

[ not compiled on:
  - mn10300: the arch doesn't actually build with highmem to begin with ]

[akpm@linux-foundation.org: coding-style fixes]
[akpm@linux-foundation.org: fix up drivers/gpu/drm/i915/intel_overlay.c]
Acked-by: NRik van Riel <riel@redhat.com>
Signed-off-by: NPeter Zijlstra <a.p.zijlstra@chello.nl>
Acked-by: NChris Metcalf <cmetcalf@tilera.com>
Cc: David Howells <dhowells@redhat.com>
Cc: Hugh Dickins <hughd@google.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: Russell King <rmk@arm.linux.org.uk>
Cc: Ralf Baechle <ralf@linux-mips.org>
Cc: David Miller <davem@davemloft.net>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Dave Airlie <airlied@linux.ie>
Cc: Li Zefan <lizf@cn.fujitsu.com>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
      3e4d3af5