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  1. 21 6月, 2006 6 次提交
  3. 29 4月, 2006 1 次提交
  5. 14 4月, 2006 1 次提交
  7. 01 4月, 2006 1 次提交
  9. 29 3月, 2006 1 次提交
  11. 28 3月, 2006 1 次提交
  13. 27 3月, 2006 4 次提交
    • D
      [PATCH] spufs: initialize context correctly · ca3e91cb
      由 Dirk Herrendoerfer 提交于 
      the mfc member of a new context was not initialized to zero,
which potentially leads to wild memory accesses.
Signed-off-by: NArnd Bergmann <arnd.bergmann@de.ibm.com>
Signed-off-by: NPaul Mackerras <paulus@samba.org>
      ca3e91cb
    • M
      [PATCH] spufs: enable SPE problem state MMIO access. · 6df10a82
      由 Mark Nutter 提交于 
      This patch is layered on top of CONFIG_SPARSEMEM
and is patterned after direct mapping of LS.

This patch allows mmap() of the following regions:
"mfc", which represents the area from [0x3000 - 0x3fff];
"cntl", which represents the area from [0x4000 - 0x4fff];
"signal1" which begins at offset 0x14000; "signal2" which
begins at offset 0x1c000.

The signal1 & signal2 files may be mmap()'d by regular user
processes.  The cntl and mfc file, on the other hand, may
only be accessed if the owning process has CAP_SYS_RAWIO,
because they have the potential to confuse the kernel
with regard to parallel access to the same files with
regular file operations: the kernel always holds a spinlock
when accessing registers in these areas to serialize them,
which can not be guaranteed with user mmaps,
Signed-off-by: NArnd Bergmann <arnd.bergmann@de.ibm.com>
Signed-off-by: NPaul Mackerras <paulus@samba.org>
      6df10a82
    • A
      [PATCH] spufs: implement mfc access for PPE-side DMA · a33a7d73
      由 Arnd Bergmann 提交于 
      This patch adds a new file called 'mfc' to each spufs directory.
The file accepts DMA commands that are a subset of what would
be legal DMA commands for problem state register access. Upon
reading the file, a bitmask is returned with the completed
tag groups set.

The file is meant to be used from an abstraction in libspe
that is added by a different patch.

From the kernel perspective, this means a process can now
offload a memory copy from or into an SPE local store
without having to run code on the SPE itself.

The transfer will only be performed while the SPE is owned
by one thread that is waiting in the spu_run system call
and the data will be transferred into that thread's
address space, independent of which thread started the
transfer.
Signed-off-by: NArnd Bergmann <arnd.bergmann@de.ibm.com>
Signed-off-by: NPaul Mackerras <paulus@samba.org>
      a33a7d73
    • A
      [PATCH] spufs: allow SPU code to do syscalls · 2dd14934
      由 Arnd Bergmann 提交于 
      An SPU does not have a way to implement system calls
itself, but it can create intercepts to the kernel.

This patch uses the method defined by the JSRE interface
for C99 host library calls from an SPU to implement
Linux system calls. It uses the reserved SPU stop code
0x2104 for this, using the structure layout and syscall
numbers for ppc64-linux.

I'm still undecided wether it is better to have a list
of allowed syscalls or a list of forbidden syscalls,
since we can't allow an SPU to call all syscalls that
are defined for ppc64-linux.

This patch implements the easier choice of them, with a
blacklist that only prevents an SPU from calling anything
that interacts with its own execution, e.g fork, execve,
clone, vfork, exit, spu_run and spu_create and everything
that deals with signals.
Signed-off-by: NArnd Bergmann <arnd.bergmann@de.ibm.com>
Signed-off-by: NPaul Mackerras <paulus@samba.org>
      2dd14934
  15. 12 1月, 2006 1 次提交
  17. 11 1月, 2006 2 次提交
  19. 10 1月, 2006 1 次提交
  21. 09 1月, 2006 21 次提交