[POWERPC] spufs: allow isolated mode apps by starting the SPE loader
This patch adds general support for isolated mode SPE apps.
Isolated apps are started indirectly, by a dedicated loader "kernel".
This patch starts the loader when spe_create is invoked with the
ISOLATE flag. We do this at spe_create time to allow libspe to pass the
isolated app in before calling spe_run.
The loader is read from the device tree, at the location
"/spu-isolation/loader". If the loader is not present, an attempt to
start an isolated SPE binary will fail with -ENODEV.
Update: loader needs to be correctly aligned - copy to a kmalloced buf.
Update: remove workaround for systemsim/spurom 'L-bit' bug, which has
been fixed.
Update: don't write to runcntl on spu_run_init: SPU is already running.
Update: do spu_setup_isolated earlier
Tested on systemsim.
Signed-off-by: Jeremy Kerr <jk@ozlabs.org>
Signed-off-by: Arnd Bergmann <arnd.bergmann@de.ibm.com>
Signed-off-by: Paul Mackerras <paulus@samba.org>
diff --git a/arch/powerpc/platforms/cell/spu_base.c b/arch/powerpc/platforms/cell/spu_base.c
index f6c94087..d78b0af 100644
--- a/arch/powerpc/platforms/cell/spu_base.c
+++ b/arch/powerpc/platforms/cell/spu_base.c
@@ -89,7 +89,30 @@
printk("%s: invalid access during switch!\n", __func__);
return 1;
}
- if (!mm || (REGION_ID(ea) != USER_REGION_ID)) {
+ esid = (ea & ESID_MASK) | SLB_ESID_V;
+
+ switch(REGION_ID(ea)) {
+ case USER_REGION_ID:
+#ifdef CONFIG_HUGETLB_PAGE
+ if (in_hugepage_area(mm->context, ea))
+ llp = mmu_psize_defs[mmu_huge_psize].sllp;
+ else
+#endif
+ llp = mmu_psize_defs[mmu_virtual_psize].sllp;
+ vsid = (get_vsid(mm->context.id, ea) << SLB_VSID_SHIFT) |
+ SLB_VSID_USER | llp;
+ break;
+ case VMALLOC_REGION_ID:
+ llp = mmu_psize_defs[mmu_virtual_psize].sllp;
+ vsid = (get_kernel_vsid(ea) << SLB_VSID_SHIFT) |
+ SLB_VSID_KERNEL | llp;
+ break;
+ case KERNEL_REGION_ID:
+ llp = mmu_psize_defs[mmu_linear_psize].sllp;
+ vsid = (get_kernel_vsid(ea) << SLB_VSID_SHIFT) |
+ SLB_VSID_KERNEL | llp;
+ break;
+ default:
/* Future: support kernel segments so that drivers
* can use SPUs.
*/
@@ -97,16 +120,6 @@
return 1;
}
- esid = (ea & ESID_MASK) | SLB_ESID_V;
-#ifdef CONFIG_HUGETLB_PAGE
- if (in_hugepage_area(mm->context, ea))
- llp = mmu_psize_defs[mmu_huge_psize].sllp;
- else
-#endif
- llp = mmu_psize_defs[mmu_virtual_psize].sllp;
- vsid = (get_vsid(mm->context.id, ea) << SLB_VSID_SHIFT) |
- SLB_VSID_USER | llp;
-
out_be64(&priv2->slb_index_W, spu->slb_replace);
out_be64(&priv2->slb_vsid_RW, vsid);
out_be64(&priv2->slb_esid_RW, esid);