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Diffstat (limited to 'arch/powerpc/mm/hash_utils_64.c')
-rw-r--r--arch/powerpc/mm/hash_utils_64.c26
1 files changed, 16 insertions, 10 deletions
diff --git a/arch/powerpc/mm/hash_utils_64.c b/arch/powerpc/mm/hash_utils_64.c
index c554768b1fa2..f2095ce9d4b0 100644
--- a/arch/powerpc/mm/hash_utils_64.c
+++ b/arch/powerpc/mm/hash_utils_64.c
@@ -35,9 +35,8 @@
#include <linux/memblock.h>
#include <linux/context_tracking.h>
#include <linux/libfdt.h>
-#include <linux/debugfs.h>
-#include <asm/debug.h>
+#include <asm/debugfs.h>
#include <asm/processor.h>
#include <asm/pgtable.h>
#include <asm/mmu.h>
@@ -927,11 +926,6 @@ static void __init htab_initialize(void)
}
#endif /* CONFIG_DEBUG_PAGEALLOC */
- /* On U3 based machines, we need to reserve the DART area and
- * _NOT_ map it to avoid cache paradoxes as it's remapped non
- * cacheable later on
- */
-
/* create bolted the linear mapping in the hash table */
for_each_memblock(memory, reg) {
base = (unsigned long)__va(reg->base);
@@ -981,6 +975,19 @@ void __init hash__early_init_devtree(void)
void __init hash__early_init_mmu(void)
{
+ /*
+ * We have code in __hash_page_64K() and elsewhere, which assumes it can
+ * do the following:
+ * new_pte |= (slot << H_PAGE_F_GIX_SHIFT) & (H_PAGE_F_SECOND | H_PAGE_F_GIX);
+ *
+ * Where the slot number is between 0-15, and values of 8-15 indicate
+ * the secondary bucket. For that code to work H_PAGE_F_SECOND and
+ * H_PAGE_F_GIX must occupy four contiguous bits in the PTE, and
+ * H_PAGE_F_SECOND must be placed above H_PAGE_F_GIX. Assert that here
+ * with a BUILD_BUG_ON().
+ */
+ BUILD_BUG_ON(H_PAGE_F_SECOND != (1ul << (H_PAGE_F_GIX_SHIFT + 3)));
+
htab_init_page_sizes();
/*
@@ -1120,7 +1127,7 @@ void demote_segment_4k(struct mm_struct *mm, unsigned long addr)
copro_flush_all_slbs(mm);
if ((get_paca_psize(addr) != MMU_PAGE_4K) && (current->mm == mm)) {
- copy_mm_to_paca(&mm->context);
+ copy_mm_to_paca(mm);
slb_flush_and_rebolt();
}
}
@@ -1192,7 +1199,7 @@ static void check_paca_psize(unsigned long ea, struct mm_struct *mm,
{
if (user_region) {
if (psize != get_paca_psize(ea)) {
- copy_mm_to_paca(&mm->context);
+ copy_mm_to_paca(mm);
slb_flush_and_rebolt();
}
} else if (get_paca()->vmalloc_sllp !=
@@ -1855,5 +1862,4 @@ static int __init hash64_debugfs(void)
return 0;
}
machine_device_initcall(pseries, hash64_debugfs);
-
#endif /* CONFIG_DEBUG_FS */