litmus-rt.git/arch/powerpc, branch v2.6.23-rc3

[POWERPC] Fix size check for hugetlbfs

2007-08-10T11:04:42+00:00

My "slices" address space management code that was added in the 2.6.22
implementation of get_unmapped_area() doesn't properly check that the
size is a multiple of the requested page size.  This allows userland to
create VMAs that aren't a multiple of the huge page size with hugetlbfs
(since hugetlbfs entirely relies on get_unmapped_area() to do that
checking) which leads to a kernel BUG() when such areas are torn down.

Signed-off-by: Benjamin Herrenschmidt 
Signed-off-by: Paul Mackerras

[POWERPC] Fix initialization and usage of dma_mask

2007-08-10T11:04:42+00:00

powerpc has a couple of bugs in the usage of dma_masks that tend to
break when drivers explicitly try to set a 32-bit mask for example.

First, the code that generates the pci devices from the OF device-tree
doesn't initialize the mask properly, then our implementation of
set_dma_mask() was trying to validate the -previous- mask value, not the
one passed in as an argument.

This fixes these problems.

Signed-off-by: Benjamin Herrenschmidt 
Signed-off-by: Paul Mackerras

[POWERPC] Fix more section mismatches in head_64.S

2007-08-10T11:04:41+00:00

WARNING: vmlinux.o(.text+0x8174): Section mismatch: reference to .init.text:.prom_init (between '.__boot_from_prom' and '.__after_prom_start')
WARNING: vmlinux.o(.text+0x8498): Section mismatch: reference to .init.text:.early_setup (between '.start_here_multiplatform' and '.start_here_common')
WARNING: vmlinux.o(.text+0x8514): Section mismatch: reference to .init.text:.setup_system (between '.start_here_common' and 'system_call_common')
WARNING: vmlinux.o(.text+0x8530): Section mismatch: reference to .init.text:.start_kernel (between '.start_here_common' and 'system_call_common')

Signed-off-by: Stephen Rothwell 
Acked-by: Geert Uytterhoeven 
Signed-off-by: Paul Mackerras

[POWERPC] Revert "[POWERPC] Add 'mdio' to bus scan id list for platforms with QE UEC"

2007-08-10T11:04:22+00:00

This reverts commit 3baee955953957be5496cd28e9c544d9db214262.

That commit was a mistake from the start; I added mdio type to the
bus scan list early on in my ucc_geth migrate to phylib development,
which is just pure wrong (the ucc_geth_mii driver creates the mii
bus and the PHY layer handles PHY enumeration without translation).

This follows on from commit 77926826f301fbd8ed96d3cd9ff17a5b59560dfb:

 Revert "[POWERPC] Don't complain if size-cells == 0 in prom_parse()"

which was basically trying to hide a symptom of the original mistake
this revert fixes.

Signed-off-by: Kim Phillips 
Signed-off-by: Paul Mackerras

[POWERPC] PS3: Update ps3_defconfig

2007-08-10T11:04:22+00:00

Update ps3_defconfig.

Signed-off-by: Geoff Levand 
Signed-off-by: Paul Mackerras

[POWERPC] PS3: Remove text saying PS3 support is incomplete

2007-08-10T11:04:22+00:00

Remove the Kconfig message that indicates the PS3 platform support is
incomplete.

Signed-off-by: Geoff Levand 
Signed-off-by: Paul Mackerras

[POWERPC] PS3: Fix storage probe logic

2007-08-10T11:04:21+00:00

Fix the PS3 storage probe logic to properly find device regions on cold
startup.

 o Change the storage probe event mask from notify_device_ready
   to notify_region_update.
 o Improve the storage probe error handling.
 o Change ps3_storage_wait_for_device() to use a temporary variable to hold
   the buffer address.

Signed-off-by: Geert Uytterhoeven 
Signed-off-by: Geoff Levand 
Signed-off-by: Paul Mackerras

[POWERPC] cell: Move SPU affinity init to spu_management_of_ops

2007-08-10T11:04:21+00:00

This patch moves affinity initialization code from spu_base.c to a
new spu_management_of_ops function (init_affinity), which is empty
in the case of PS3. This fixes a linking problem that was happening
when compiling for PS3.
Also, some small code style changes were made.

Signed-off-by: Andre Detsch 
Signed-off-by: Geoff Levand 
Acked-by: Arnd Bergmann 
Signed-off-by: Paul Mackerras

[POWERPC] Fix potential duplicate entry in SLB shadow buffer

2007-08-10T11:04:07+00:00

We were getting a duplicate entry in the SLB shadow buffer in
slb_flush_and_rebolt() if the kernel stack was in the same segment
as PAGE_OFFSET, which on POWER6 causes the hypervisor to terminate
the partition with an error.  This fixes it.

Also we were not creating an SLB entry (or an SLB shadow buffer
entry) for the kernel stack on secondary CPUs when starting the
CPU.  This isn't a major problem, since an appropriate entry will
be created on demand, but this fixes that also for consistency.

Signed-off-by: Paul Mackerras

[POWERPC] Fixes for the SLB shadow buffer code

2007-08-03T09:36:01+00:00

On a machine with hardware 64kB pages and a kernel configured for a
64kB base page size, we need to change the vmalloc segment from 64kB
pages to 4kB pages if some driver creates a non-cacheable mapping in
the vmalloc area.  However, we never updated with SLB shadow buffer.
This fixes it.  Thanks to paulus for finding this.

Also added some write barriers to ensure the shadow buffer contents
are always consistent.

Signed-off-by: Michael Neuling 
Signed-off-by: Paul Mackerras