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| author | David S. Miller | 2014-09-25 06:49:29 +0200 |
|---|---|---|
| committer | David S. Miller | 2014-10-06 01:53:40 +0200 |
| commit | 7c0fa0f24bb76ce3d67be7f737b799846a04570f (patch) | |
| tree | 5383bc77f280dc29c5cc422cae89283c6fcb8690 /arch/sparc/include/asm/pgtable_64.h | |
| parent | sparc64: Use kernel page tables for vmemmap. (diff) | |
| download | kernel-qcow2-linux-7c0fa0f24bb76ce3d67be7f737b799846a04570f.tar.gz kernel-qcow2-linux-7c0fa0f24bb76ce3d67be7f737b799846a04570f.tar.xz kernel-qcow2-linux-7c0fa0f24bb76ce3d67be7f737b799846a04570f.zip | |
sparc64: Increase MAX_PHYS_ADDRESS_BITS to 53.
Make sure, at compile time, that the kernel can properly support
whatever MAX_PHYS_ADDRESS_BITS is defined to.
On M7 chips, use a max_phys_bits value of 49.
Based upon a patch by Bob Picco.
Signed-off-by: David S. Miller <davem@davemloft.net>
Acked-by: Bob Picco <bob.picco@oracle.com>
Diffstat (limited to 'arch/sparc/include/asm/pgtable_64.h')
| -rw-r--r-- | arch/sparc/include/asm/pgtable_64.h | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/arch/sparc/include/asm/pgtable_64.h b/arch/sparc/include/asm/pgtable_64.h index a305b22ab581..0552957f6ddc 100644 --- a/arch/sparc/include/asm/pgtable_64.h +++ b/arch/sparc/include/asm/pgtable_64.h @@ -67,6 +67,10 @@ #define PGDIR_MASK (~(PGDIR_SIZE-1)) #define PGDIR_BITS (PAGE_SHIFT - 3) +#if (MAX_PHYS_ADDRESS_BITS > PGDIR_SHIFT + PGDIR_BITS) +#error MAX_PHYS_ADDRESS_BITS exceeds what kernel page tables can support +#endif + #if (PGDIR_SHIFT + PGDIR_BITS) != 53 #error Page table parameters do not cover virtual address space properly. #endif |