1 files changed, 14 insertions, 4 deletions

diff --git a/arch/powerpc/platforms/ps3/spu.c b/arch/powerpc/platforms/ps3/spu.c
index d135cef9ed6a..ccae3d446b98 100644
--- a/arch/powerpc/platforms/ps3/spu.c
+++ b/arch/powerpc/platforms/ps3/spu.c
@@ -186,14 +186,24 @@ static void spu_unmap(struct spu *spu)
         iounmap(spu_pdata(spu)->shadow);
 }
 
+/**
+ * setup_areas - Map the spu regions into the address space.
+ *
+ * The current HV requires the spu shadow regs to be mapped with the
+ * PTE page protection bits set as read-only (PP=3).  This implementation
+ * uses the low level __ioremap() to bypass the page protection settings
+ * inforced by ioremap_flags() to get the needed PTE bits set for the
+ * shadow regs.
+ */
+
 static int __init setup_areas(struct spu *spu)
 {
         struct table {char* name; unsigned long addr; unsigned long size;};
+        static const unsigned long shadow_flags = _PAGE_NO_CACHE | 3;
 
-        spu_pdata(spu)->shadow = ioremap_flags(spu_pdata(spu)->shadow_addr,
-                                               sizeof(struct spe_shadow),
-                                               pgprot_val(PAGE_READONLY) |
-                                               _PAGE_NO_CACHE);
+        spu_pdata(spu)->shadow = __ioremap(spu_pdata(spu)->shadow_addr,
+                                           sizeof(struct spe_shadow),
+                                           shadow_flags);
         if (!spu_pdata(spu)->shadow) {
                 pr_debug("%s:%d: ioremap shadow failed\n", __func__, __LINE__);
                 goto fail_ioremap;