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  1. 14 Jun, 2007 13 commits
    • Benjamin Herrenschmidt's avatar
      [POWERPC] spufs: Add support for SPU single stepping · 05169237
      Benjamin Herrenschmidt authored 
      This patch adds support for SPU single stepping. The single
step bit is set in the SPU when the current process is
being single-stepped via ptrace. The spu then stops and
returns with a specific flag set and the syscall exit code
will generate the SIGTRAP.
Signed-off-by: default avatarBenjamin Herrenschmidt <benh@kernel.crashing.org>
Acked-by: default avatarJeremy Kerr <jk@ozlabs.org>
Signed-off-by: default avatarPaul Mackerras <paulus@samba.org>
      05169237
    • Benjamin Herrenschmidt's avatar
      [POWERPC] Rewrite IO allocation & mapping on powerpc64 · 3d5134ee
      Benjamin Herrenschmidt authored 
      This rewrites pretty much from scratch the handling of MMIO and PIO
space allocations on powerpc64.  The main goals are:

 - Get rid of imalloc and use more common code where possible
 - Simplify the current mess so that PIO space is allocated and
   mapped in a single place for PCI bridges
 - Handle allocation constraints of PIO for all bridges including
   hot plugged ones within the 2GB space reserved for IO ports,
   so that devices on hotplugged busses will now work with drivers
   that assume IO ports fit in an int.
 - Cleanup and separate tracking of the ISA space in the reserved
   low 64K of IO space. No ISA -> Nothing mapped there.

I booted a cell blade with IDE on PIO and MMIO and a dual G5 so
far, that's it :-)

With this patch, all allocations are done using the code in
mm/vmalloc.c, though we use the low level __get_vm_area with
explicit start/stop constraints in order to manage separate
areas for vmalloc/vmap, ioremap, and PCI IOs.

This greatly simplifies a lot of things, as you can see in the
diffstat of that patch :-)

A new pair of functions pcibios_map/unmap_io_space() now replace
all of the previous code that used to manipulate PCI IOs space.
The allocation is done at mapping time, which is now called from
scan_phb's, just before the devices are probed (instead of after,
which is by itself a bug fix). The only other caller is the PCI
hotplug code for hot adding PCI-PCI bridges (slots).

imalloc is gone, as is the "sub-allocation" thing, but I do beleive
that hotplug should still work in the sense that the space allocation
is always done by the PHB, but if you unmap a child bus of this PHB
(which seems to be possible), then the code should properly tear
down all the HPTE mappings for that area of the PHB allocated IO space.

I now always reserve the first 64K of IO space for the bridge with
the ISA bus on it. I have moved the code for tracking ISA in a separate
file which should also make it smarter if we ever are capable of
hot unplugging or re-plugging an ISA bridge.

This should have a side effect on platforms like powermac where VGA IOs
will no longer work. This is done on purpose though as they would have
worked semi-randomly before. The idea at this point is to isolate drivers
that might need to access those and fix them by providing a proper
function to obtain an offset to the legacy IOs of a given bus.
Signed-off-by: default avatarBenjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: default avatarPaul Mackerras <paulus@samba.org>
      3d5134ee
    • Benjamin Herrenschmidt's avatar
      [POWERPC] unmap_vm_area becomes unmap_kernel_range for the public · c19c03fc
      Benjamin Herrenschmidt authored 
      This makes unmap_vm_area static and a wrapper around a new
exported unmap_kernel_range that takes an explicit range instead
of a vm_area struct.

This makes it more versatile for code that wants to play with kernel
page tables outside of the standard vmalloc area.

(One example is some rework of the PowerPC PCI IO space mapping
code that depends on that patch and removes some code duplication
and horrible abuse of forged struct vm_struct).
Signed-off-by: default avatarBenjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: default avatarPaul Mackerras <paulus@samba.org>
      c19c03fc
    • Linas Vepstas's avatar
      [POWERPC] Tweak EEH copyright info · 3c8c90ab
      Linas Vepstas authored 
      Twiddle the copyright notices. Per current guidelines, the use
of the (C) or (c) in source code is deprecated.
Signed-off-by: default avatarLinas Vepstas <linas@austin.ibm.com>

----
 arch/powerpc/platforms/pseries/eeh.c        |    6 +++++-
 arch/powerpc/platforms/pseries/eeh_cache.c  |    3 ++-
 arch/powerpc/platforms/pseries/eeh_driver.c |    6 +++---
 3 files changed, 10 insertions(+), 5 deletions(-)
Signed-off-by: default avatarPaul Mackerras <paulus@samba.org>
      3c8c90ab
    • Linas Vepstas's avatar
      [POWERPC] Remove dead EEH code · 42253a68
      Linas Vepstas authored 
      Remove some dead code.
Signed-off-by: default avatarLinas Vepstas <linas@austin.ibm.com>

----
 arch/powerpc/platforms/pseries/eeh.c |    4 +---
 1 file changed, 1 insertion(+), 3 deletions(-)
Signed-off-by: default avatarPaul Mackerras <paulus@samba.org>
      42253a68
    • Linas Vepstas's avatar
      [POWERPC] Show EEH per-device false positives · 858955bd
      Linas Vepstas authored 
      Track and report the number of times we read an all-1s value (0xff,
0xffff or 0xffffffff) from each device which is valid data, not
indicating EEH isolation.
Signed-off-by: default avatarLinas Vepstas <linas@austin.ibm.com>

----
 arch/powerpc/platforms/pseries/eeh.c       |    5 +++++
 arch/powerpc/platforms/pseries/eeh_sysfs.c |    3 +++
 include/asm-powerpc/pci-bridge.h           |    1 +
 3 files changed, 9 insertions(+)
Signed-off-by: default avatarPaul Mackerras <paulus@samba.org>
      858955bd
    • Linas Vepstas's avatar
      [POWERPC] Add EEH sysfs blinkenlights · e1d04c97
      Linas Vepstas authored 
      Add sysfs blinkenlights for EEH statistics.  Shuffle the
eeh_add_device_tree() call so that it appears in the correct
sequence.
Signed-off-by: default avatarLinas Vepstas <linas@austin.ibm.com>

----
 arch/powerpc/platforms/pseries/Makefile    |    2
 arch/powerpc/platforms/pseries/eeh.c       |    4 +
 arch/powerpc/platforms/pseries/eeh_cache.c |    2
 arch/powerpc/platforms/pseries/eeh_sysfs.c |   84 +++++++++++++++++++++++++++++
 arch/powerpc/platforms/pseries/pci_dlpar.c |    7 +-
 include/asm-powerpc/ppc-pci.h              |    3 +
 6 files changed, 98 insertions(+), 4 deletions(-)
Signed-off-by: default avatarPaul Mackerras <paulus@samba.org>
      e1d04c97
    • Linas Vepstas's avatar
      [POWERPC] pseries: asm/pci-bridge.h CONFIG_ minor cleanup · c2e221e8
      Linas Vepstas authored 
      Use the correct CONFIG_ option to mark off the EEH bits.
Move the EEH bits to the bottom of the struct.
The config_space array is used by EEH only; it does not
need to be part of the struct for non-pseries machines.
Signed-off-by: default avatarLinas Vepstas <linas@austin.ibm.com>

----
Revised patch, per commments from Michael Ellerman.

 include/asm-powerpc/pci-bridge.h |   16 +++++++++-------
 1 file changed, 9 insertions(+), 7 deletions(-)
Signed-off-by: default avatarPaul Mackerras <paulus@samba.org>
      c2e221e8
    • Jon Tollefson's avatar
      [POWERPC] Move common code out of if/else · 3f1df7a2
      Jon Tollefson authored 
      Move common code out of if/else.
Signed-off-by: default avatarJon Tollefson <kniht@linux.vnet.ibm.com>
----

hash_native_64.c |    3 +--
 1 files changed, 1 insertion(+), 2 deletions(-)
Signed-off-by: default avatarPaul Mackerras <paulus@samba.org>
      3f1df7a2
    • Segher Boessenkool's avatar
      [POWERPC] Fix VDSO compile warning · 31fe5bf6
      Segher Boessenkool authored 
      Maybe the type should have been char[] instead of __u8[]
in the first place, but this will do.
Signed-off-by: default avatarSegher Boessenkool <segher@kernel.crashing.org>
Signed-off-by: default avatarPaul Mackerras <paulus@samba.org>
      31fe5bf6
    • Anton Blanchard's avatar
      [POWERPC] Reserve threadinfo flags for perfmon2 · f341973d
      Anton Blanchard authored 
      Reserve two TIF flags for perfmon2 and shift them into the low 16 bits
so we can use single assembly instructions to create constants based off
them.
Signed-off-by: default avatarAnton Blanchard <anton@samba.org>
Signed-off-by: default avatarPaul Mackerras <paulus@samba.org>
      f341973d
    • Milton Miller's avatar
      [POWERPC] Fix console output getting dropped on platforms without udbg_putc · 220ddc08
      Milton Miller authored 
      Previously, registering this early console would just result
in dropping early buffered printk output until a udbg_putc
was registered.

However, commit 69331af7
clears the CON_PRINTBUFFER flag on the main console when a
CON_BOOT (early) console has been registered, resulting in
the buffered messages never being displayed to the user.

This fixes the problem by making sure we don't register udbg_console
on platforms that don't implement udbg_putc.
Signed-off-by: default avatarMilton Miller <miltonm@bga.com>
Acked-by: default avatarMark A. Greer <mgreer@mvista.com>
Signed-off-by: default avatarPaul Mackerras <paulus@samba.org>
      220ddc08
    • Paul Mackerras's avatar
      [POWERPC] Fix per-cpu allocation on oldworld SMP powermacs · c63c4faa
      Paul Mackerras authored 
      The per-cpu area(a) for the secondary CPU(s) isn't getting allocated
on old SMP powermacs that don't have the secondary CPU(s) listed in
the device tree, as per-cpu areas are now only allocated for CPUs in
the cpu_possible_map, and we aren't setting the bits for the secondary
CPU(s) until smp_prepare_cpus(), which is after per-cpu allocation.
Therefore this sets the bits for CPUs 1..3 in cpu_possible_map in
pmac_setup_arch, so they get per-cpu data allocated.
Signed-off-by: default avatarPaul Mackerras <paulus@samba.org>
      c63c4faa
  3. 13 Jun, 2007 8 commits
  5. 12 Jun, 2007 15 commits
  7. 11 Jun, 2007 4 commits
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