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authorArnd Bergmann <abergman@de.ibm.com>2006-03-22 18:00:09 -0500
committerPaul Mackerras <paulus@samba.org>2006-03-26 22:48:24 -0500
commit2dd14934c9138c562d93c501e88c6d6f061eb8ba (patch)
tree2eda4f517dd319989908a80bfbe06ce629932f77 /include/asm-powerpc/spu.h
parenta7f31841a40776605c834053ad1eb82d539bd79f (diff)
[PATCH] spufs: allow SPU code to do syscalls
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: Arnd Bergmann <arnd.bergmann@de.ibm.com> Signed-off-by: Paul Mackerras <paulus@samba.org>
Diffstat (limited to 'include/asm-powerpc/spu.h')
-rw-r--r--include/asm-powerpc/spu.h9
1 files changed, 8 insertions, 1 deletions
diff --git a/include/asm-powerpc/spu.h b/include/asm-powerpc/spu.h
index 38bacf2f6e0c..b5c90d6fdceb 100644
--- a/include/asm-powerpc/spu.h
+++ b/include/asm-powerpc/spu.h
@@ -149,6 +149,14 @@ int spu_irq_class_0_bottom(struct spu *spu);
149int spu_irq_class_1_bottom(struct spu *spu); 149int spu_irq_class_1_bottom(struct spu *spu);
150void spu_irq_setaffinity(struct spu *spu, int cpu); 150void spu_irq_setaffinity(struct spu *spu, int cpu);
151 151
152/* system callbacks from the SPU */
153struct spu_syscall_block {
154 u64 nr_ret;
155 u64 parm[6];
156};
157extern long spu_sys_callback(struct spu_syscall_block *s);
158
159/* syscalls implemented in spufs */
152extern struct spufs_calls { 160extern struct spufs_calls {
153 asmlinkage long (*create_thread)(const char __user *name, 161 asmlinkage long (*create_thread)(const char __user *name,
154 unsigned int flags, mode_t mode); 162 unsigned int flags, mode_t mode);
@@ -399,7 +407,6 @@ struct spu_priv1 {
399#define SPU_GET_REVISION_BITS(vr) (vr & SPU_REVISION_BITS) 407#define SPU_GET_REVISION_BITS(vr) (vr & SPU_REVISION_BITS)
400 u8 pad_0x28_0x100[0x100 - 0x28]; /* 0x28 */ 408 u8 pad_0x28_0x100[0x100 - 0x28]; /* 0x28 */
401 409
402
403 /* Interrupt Area */ 410 /* Interrupt Area */
404 u64 int_mask_RW[3]; /* 0x100 */ 411 u64 int_mask_RW[3]; /* 0x100 */
405#define CLASS0_ENABLE_DMA_ALIGNMENT_INTR 0x1L 412#define CLASS0_ENABLE_DMA_ALIGNMENT_INTR 0x1L