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| author | Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com> | 2018-03-26 15:34:48 +0530 |
|---|---|---|
| committer | Michael Ellerman <mpe@ellerman.id.au> | 2018-03-31 00:10:38 +1100 |
| commit | f384796c40dc55b3dba25e0ee9c1afd98c6d24d1 (patch) | |
| tree | 400e1127554c05abff89a9d09bac2b40f844eba7 /arch/powerpc/include/asm/processor.h | |
| parent | 0dea04b288c06654b0de3563c5b8cdfe6130e450 (diff) | |
| download | linux-f384796c40dc55b3dba25e0ee9c1afd98c6d24d1.tar.bz2 | |
powerpc/mm: Add support for handling > 512TB address in SLB miss
For addresses above 512TB we allocate additional mmu contexts. To make
it all easy, addresses above 512TB are handled with IR/DR=1 and with
stack frame setup.
The mmu_context_t is also updated to track the new extended_ids. To
support upto 4PB we need a total 8 contexts.
Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
[mpe: Minor formatting tweaks and comment wording, switch BUG to WARN
in get_ea_context().]
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Diffstat (limited to 'arch/powerpc/include/asm/processor.h')
| -rw-r--r-- | arch/powerpc/include/asm/processor.h | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/arch/powerpc/include/asm/processor.h b/arch/powerpc/include/asm/processor.h index 01299cdc9806..75b084486ce1 100644 --- a/arch/powerpc/include/asm/processor.h +++ b/arch/powerpc/include/asm/processor.h @@ -119,9 +119,15 @@ void release_thread(struct task_struct *); */ #define TASK_SIZE_USER64 TASK_SIZE_512TB #define DEFAULT_MAP_WINDOW_USER64 TASK_SIZE_128TB +#define TASK_CONTEXT_SIZE TASK_SIZE_512TB #else #define TASK_SIZE_USER64 TASK_SIZE_64TB #define DEFAULT_MAP_WINDOW_USER64 TASK_SIZE_64TB +/* + * We don't need to allocate extended context ids for 4K page size, because + * we limit the max effective address on this config to 64TB. + */ +#define TASK_CONTEXT_SIZE TASK_SIZE_64TB #endif /* |