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  1. 04 12月, 2006 1 次提交
    • B
      [POWERPC] Make pci_read_irq_line the default · f90bb153
      由 Benjamin Herrenschmidt 提交于 
      This patch reworks the way IRQs are fixed up on PCI for arch powerpc.

It makes pci_read_irq_line() called by default in the PCI code for
devices that are probed, and add an optional per-device fixup in
ppc_md for platforms that really need to correct what they obtain
from pci_read_irq_line().

It also removes ppc_md.irq_bus_setup which was only used by pSeries
and should not be needed anymore.

I've also removed the pSeries s7a workaround as it can't work with
the current interrupt code anyway. I'm trying to get one of these
machines working so I can test a proper fix for that problem.

I also haven't updated the old-style fixup code from 85xx_cds.c
because it's actually buggy :) It assigns pci_dev->irq hard coded
numbers which is no good with the new IRQ mapping code. It should
at least use irq_create_mapping(NULL, hard_coded_number); and possibly
also set_irq_type() to set them as level low.
Signed-off-by: NBenjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: NPaul Mackerras <paulus@samba.org>
      f90bb153
  3. 02 12月, 2006 1 次提交
  5. 30 11月, 2006 1 次提交
  7. 22 11月, 2006 3 次提交
  9. 15 11月, 2006 1 次提交
    • H
      [PATCH] hugetlb: prepare_hugepage_range check offset too · 68589bc3
      由 Hugh Dickins 提交于 
      (David:)

If hugetlbfs_file_mmap() returns a failure to do_mmap_pgoff() - for example,
because the given file offset is not hugepage aligned - then do_mmap_pgoff
will go to the unmap_and_free_vma backout path.

But at this stage the vma hasn't been marked as hugepage, and the backout path
will call unmap_region() on it.  That will eventually call down to the
non-hugepage version of unmap_page_range().  On ppc64, at least, that will
cause serious problems if there are any existing hugepage pagetable entries in
the vicinity - for example if there are any other hugepage mappings under the
same PUD.  unmap_page_range() will trigger a bad_pud() on the hugepage pud
entries.  I suspect this will also cause bad problems on ia64, though I don't
have a machine to test it on.

(Hugh:)

prepare_hugepage_range() should check file offset alignment when it checks
virtual address and length, to stop MAP_FIXED with a bad huge offset from
unmapping before it fails further down.  PowerPC should apply the same
prepare_hugepage_range alignment checks as ia64 and all the others do.

Then none of the alignment checks in hugetlbfs_file_mmap are required (nor
is the check for too small a mapping); but even so, move up setting of
VM_HUGETLB and add a comment to warn of what David Gibson discovered - if
hugetlbfs_file_mmap fails before setting it, do_mmap_pgoff's unmap_region
when unwinding from error will go the non-huge way, which may cause bad
behaviour on architectures (powerpc and ia64) which segregate their huge
mappings into a separate region of the address space.
Signed-off-by: NHugh Dickins <hugh@veritas.com>
Cc: "Luck, Tony" <tony.luck@intel.com>
Cc: "David S. Miller" <davem@davemloft.net>
Acked-by: NAdam Litke <agl@us.ibm.com>
Acked-by: NDavid Gibson <david@gibson.dropbear.id.au>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: NAndrew Morton <akpm@osdl.org>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>
      68589bc3
  11. 13 11月, 2006 14 次提交
  13. 10 11月, 2006 3 次提交
  15. 09 11月, 2006 1 次提交
  17. 02 11月, 2006 1 次提交
  19. 01 11月, 2006 7 次提交
    • B
      [POWERPC] Make alignment exception always check exception table · 4393c4f6
      由 Benjamin Herrenschmidt 提交于 
      The alignment exception used to only check the exception table for
-EFAULT, not for other errors. That opens an oops window if we can
coerce the kernel into getting an alignment exception for other reasons
in what would normally be a user-protected accessor, which can be done
via some of the futex ops. This fixes it by always checking the
exception tables.
Signed-off-by: NBenjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: NPaul Mackerras <paulus@samba.org>
      4393c4f6
    • G
      [POWERPC] Disallow kprobes on emulate_step and branch_taken · 0d69a052
      由 Gui,Jian 提交于 
      On powerpc, probing on emulate_step function will crash 2.6.18.1 when
it is triggered.

When kprobe is triggered, emulate_step() is on its kernel path and
will cause recursive kprobe fault.  And branch_taken() is called
in emulate_step().  This disallows kprobes on both of them.
Signed-off-by: NPaul Mackerras <paulus@samba.org>
      0d69a052
    • H
      [POWERPC] Make high hugepage areas preempt safe · 96268889
      由 Hugh Dickins 提交于 
      Checking source for other get_paca()->field preemption dangers found that
open_high_hpage_areas does a structure copy into its paca while preemption
is enabled: unsafe however gcc accomplishes it.  Just remove that copy:
it's done safely afterwards by on_each_cpu, as in open_low_hpage_areas.
Signed-off-by: NHugh Dickins <hugh@veritas.com>
Acked-by: NDavid Gibson <dwg@au1.ibm.com>
Signed-off-by: NPaul Mackerras <paulus@samba.org>
      96268889
    • T
      [POWERPC] qe_lib: qe_issue_cmd writes wrong value to CECDR · 302439d2
      由 Timur Tabi 提交于 
      Changed qe_issue_cmd() to write cmd_input to the CECDR unmodified.  It
was treating cmd_input as a virtual address and tried to convert it to
a physical address.
Signed-off-by: NTimur Tabi <timur@freescale.com>
Signed-off-by: NPaul Mackerras <paulus@samba.org>
      302439d2
    • L
      [POWERPC] Use 4kB iommu pages even on 64kB-page systems · 5d2efba6
      由 Linas Vepstas 提交于 
      The 10Gigabit ethernet device drivers appear to be able to chew
up all 256MB of TCE mappings on pSeries systems, as evidenced by
numerous error messages:

 iommu_alloc failed, tbl c0000000010d5c48 vaddr c0000000d875eff0 npages 1

Some experimentation indicates that this is essentially because
one 1500 byte ethernet MTU gets mapped as a 64K DMA region when
the large 64K pages are enabled. Thus, it doesn't take much to
exhaust all of the available DMA mappings for a high-speed card.

This patch changes the iommu allocator to work with its own
unique, distinct page size. Although the patch is long, its
actually quite simple: it just #defines a distinct IOMMU_PAGE_SIZE
and then uses this in all the places that matter.

As a side effect, it also dramatically improves network performance
on platforms with H-calls on iommu translation inserts/removes (since
we no longer call it 16 times for a 1500 bytes packet when the iommu HW
is still 4k).

In the future, we might want to make the IOMMU_PAGE_SIZE a variable
in the iommu_table instance, thus allowing support for different HW
page sizes in the iommu itself.
Signed-off-by: NLinas Vepstas <linas@austin.ibm.com>
Signed-off-by: NBenjamin Herrenschmidt <benh@kernel.crashing.org>
Acked-by: NOlof Johansson <olof@lixom.net>
Acked-by: NStephen Rothwell <sfr@canb.auug.org.au>
Signed-off-by: NPaul Mackerras <paulus@samba.org>
      5d2efba6
    • A
      [POWERPC] Fix oprofile support for e500 in arch/powerpc · dd6c89f6
      由 Andy Fleming 提交于 
      Fixed a compile error in building the 85xx support with oprofile, and in
the process cleaned up some issues with the fsl_booke performance monitor
code.

* Reorganized FSL Book-E performance monitoring code so that the 7450
  wouldn't be built if the e500 was, and cleaned it up so it was more
  self-contained.

* Added a cpu_setup function for FSL Book-E.  The original
  cpu_setup function prototype had no arguments, assuming that
  the reg_setup function would copy the required information into
  variables which represented the registers.  This was silly for
  e500, since it has 1 register per counter (rather than 3 for
  all counters), so the code has been restructured to have
  cpu_setup take the current counter config array as an argument,
  with op_powerpc_setup() invoking op_powerpc_cpu_setup() through
  on_each_cpu(), and op_powerpc_cpu_setup() invoking the
  model-specific cpu_setup function with an argument.  The
  argument is ignored on all other platforms at present.

* Fixed a confusing line where a trinary operator only had two
  arguments
Signed-off-by: NAndrew Fleming <afleming@freescale.com>
Signed-off-by: NPaul Mackerras <paulus@samba.org>
      dd6c89f6
    • B
      [POWERPC] Fix various offb issues · 441cbd8d
      由 Benjamin Herrenschmidt 提交于 
      This patch fixes a few issues in offb:

 - A test was inverted causing the palette hack to never work
(no device node was passed down to the init function)

 - Some cards seem to have their assigned-addresses property in a random
order, thus we need to try using of_get_pci_address() first, which will
fail if it's not a PCI device, and fallback to of_get_address() in that
case. of_get_pci_address() properly parsees assigned-addresses to test
the BAR number and thus will get it right whatever the order is.

 - Some cards (like GXT4500) provide a linebytes of 0xffffffff in the
device-tree which does no good. This patch handles that by using the
screen width when that happens. (Also fixes btext.c while at it).

 - Add detection of the GXT4500 in addition to the GXT2000 for the
palette hacks (we use the same hack, palette is linear in register space
at offset 0x6000).
Signed-off-by: NBenjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: NPaul Mackerras <paulus@samba.org>
      441cbd8d
  21. 28 10月, 2006 1 次提交
  23. 26 10月, 2006 1 次提交
  25. 25 10月, 2006 5 次提交
    • C
      [POWERPC] cell: add cpufreq driver for Cell BE processor · 36ca4ba4
      由 Christian Krafft 提交于 
      This patch adds a cpufreq backend driver to enable frequency scaling on cell.
Signed-off-by: NChristian Krafft <krafft@de.ibm.com>
Signed-off-by: NArnd Bergmann <arnd.bergmann@de.ibm.com>
Signed-off-by: NPaul Mackerras <paulus@samba.org>
      36ca4ba4
    • M
      [POWERPC] add support for dumping spu info from xmon · a8984970
      由 Michael Ellerman 提交于 
      This patch adds a command to xmon for dumping information about
spu structs. The command is 'sf' for "spu fields" perhaps, and
takes the spu number as an argument. This is the same value as the
spu->number field, or the "phys-id" value of a context when it is
bound to a physical spu.

We try to catch memory errors as we dump each field, hopefully this
will make the command reasonably robust, but YMMV. If people see a
need we can easily add more fields to the dump in future.

Output looks something like this:

0:mon> sf 0
Dumping spu fields at address c00000001ffd9e80:
  number                  = 0x0
  name                    = spe
  devnode->full_name      = /cpus/PowerPC,BE@0/spes/spe@0
  nid                     = 0x0
  local_store_phys        = 0x20000000000
  local_store             = 0xd0000800801e0000
  ls_size                 = 0x0
  isrc                    = 0x4
  node                    = 0x0
  flags                   = 0x0
  dar                     = 0x0
  dsisr                   = 0x0
  class_0_pending         = 0
  irqs[0]                 = 0x16
  irqs[1]                 = 0x17
  irqs[2]                 = 0x24
  slb_replace             = 0x0
  pid                     = 0
  prio                    = 0
  mm                      = 0x0000000000000000
  ctx                     = 0x0000000000000000
  rq                      = 0x0000000000000000
  timestamp               = 0x0000000000000000
  problem_phys            = 0x20000040000
  problem                 = 0xd000080080220000
  problem->spu_runcntl_RW = 0x0
  problem->spu_status_R   = 0x0
  problem->spu_npc_RW     = 0x0
  priv1                   = 0xd000080080240000
  priv1->mfc_sr1_RW       = 0x33
  priv2                   = 0xd000080080250000
Signed-off-by: NMichael Ellerman <michael@ellerman.id.au>
Signed-off-by: NArnd Bergmann <arnd.bergmann@de.ibm.com>
Signed-off-by: NPaul Mackerras <paulus@samba.org>
      a8984970
    • M
      [POWERPC] add support for stopping spus from xmon · ff8a8f25
      由 Michael Ellerman 提交于 
      This patch adds support for stopping, and restarting, spus
from xmon. We use the spu master runcntl bit to stop execution,
this is apparently the "right" way to control spu execution and
spufs will be changed in the future to use this bit.

Testing has shown that to restart execution we have to turn the
master runcntl bit on and also rewrite the spu runcntl bit, even
if it is already set to 1 (running).

Stopping spus is triggered by the xmon command 'ss' - "spus stop"
perhaps. Restarting them is triggered via 'sr'. Restart doesn't
start execution on spus unless they were running prior to being
stopped by xmon.

Walking the spu->full_list in xmon after a panic, would mean
corruption of any spu struct would make all the others
inaccessible. To avoid this, and also to make the next patch
easier, we cache pointers to all spus during boot.

We attempt to catch and recover from errors while stopping and
restarting the spus, but as with most xmon functionality there are
no guarantees that performing these operations won't crash xmon
itself.
Signed-off-by: NMichael Ellerman <michael@ellerman.id.au>
Signed-off-by: NArnd Bergmann <arnd.bergmann@de.ibm.com>
Signed-off-by: NPaul Mackerras <paulus@samba.org>
      ff8a8f25
    • A
      [POWERPC] cell: use ppc_md->power_save instead of cbe_idle_loop · 302eca18
      由 arnd@arndb.de 提交于 
      This moves the cell idle function to use the default cpu_idle
with a special power_save callback, like all other platforms
except iSeries already do.

It also makes it possible to disable this power_save function
with a new powerpc-specific boot option "powersave=off".
Signed-off-by: NArnd Bergmann <arnd.bergmann@de.ibm.com>
Signed-off-by: NPaul Mackerras <paulus@samba.org>
      302eca18
    • C
      [POWERPC] cell: add temperature to SPU and CPU sysfs entries · b3d7dc19
      由 Christian Krafft 提交于 
      This patch adds a module that registers sysfs attributes to CPU and SPU
containing the temperature of the CBE.

They can be found under
/sys/devices/system/spu/cpuX/thermal/temperature[0|1]
/sys/devices/system/spu/spuX/thermal/temperature

The temperature is read from the on-chip temperature sensors.
Signed-off-by: NChristian Krafft <krafft@de.ibm.com>
Signed-off-by: NArnd Bergmann <arnd.bergmann@de.ibm.com>
Signed-off-by: NPaul Mackerras <paulus@samba.org>
      b3d7dc19