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| author | Aneesh Kumar K.V <aneesh.kumar@linux.ibm.com> | 2020-06-08 12:39:04 +0530 |
|---|---|---|
| committer | Michael Ellerman <mpe@ellerman.id.au> | 2020-09-15 22:13:22 +1000 |
| commit | b32d5d7e920a364287f6206af2d20179978a617d (patch) | |
| tree | 7b59e35679a1beb2c3540f1bb8ea03bdb960a02f /arch/powerpc/kernel/prom.c | |
| parent | 7746406baa3bc9e23fdd7b7da2f04d86e25ab837 (diff) | |
| download | linux-b32d5d7e920a364287f6206af2d20179978a617d.tar.gz | |
powerpc/mm/book3s: Split radix and hash MAX_PHYSMEM limit
MAX_PHYSMEM #define is used along with sparsemem to determine the SECTION_SHIFT
value. Powerpc also uses the same value to limit the max memory enabled on the
system. With 4K PAGE_SIZE and hash translation mode, we want to limit the max
memory enabled to 64TB due to page table size restrictions. However, with
radix translation, we don't have these restrictions. Hence split the radix
and hash MA_PHYSMEM limit and use different limit for each of them.
Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20200608070904.387440-4-aneesh.kumar@linux.ibm.com
Diffstat (limited to 'arch/powerpc/kernel/prom.c')
| -rw-r--r-- | arch/powerpc/kernel/prom.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/arch/powerpc/kernel/prom.c b/arch/powerpc/kernel/prom.c index d8a2fb87ba0c..c1545f22c077 100644 --- a/arch/powerpc/kernel/prom.c +++ b/arch/powerpc/kernel/prom.c @@ -776,6 +776,11 @@ void __init early_init_devtree(void *params) limit = ALIGN(memory_limit ?: memblock_phys_mem_size(), PAGE_SIZE); memblock_enforce_memory_limit(limit); +#if defined(CONFIG_PPC_BOOK3S_64) && defined(CONFIG_PPC_4K_PAGES) + if (!early_radix_enabled()) + memblock_cap_memory_range(0, 1UL << (H_MAX_PHYSMEM_BITS)); +#endif + memblock_allow_resize(); memblock_dump_all(); |