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powerpc/mm: Increase the slice range to 64TB

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This patch makes the high psizes mask as an unsigned char array
so that we can have more than 16TB. Currently we support upto
64TB

Reviewed-by: Paul Mackerras <paulus@samba.org>
Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
This commit is contained in:
Aneesh Kumar K.V 2012-09-10 02:52:52 +00:00 • committed by Benjamin Herrenschmidt
parent 67550080b8
commit 7aa0727f33
5 changed files with 109 additions and 55 deletions
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6
arch/powerpc/include/asm/mmu-hash64.h
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@ -460,7 +460,11 @@ typedef struct {
#ifdef CONFIG_PPC_MM_SLICES
u64 low_slices_psize; /* SLB page size encodings */
u64 high_slices_psize; /* 4 bits per slice for now */
/*
* Right now we support 64TB and 4 bits for each
* 1TB slice we need 32 bytes for 64TB.
*/
unsigned char high_slices_psize[32]; /* 4 bits per slice for now */
#else
u16 sllp; /* SLB page size encoding */
#endif