Re: [Crash-utility] [PATCH v2] book3s/ppc64: update hash page table geometry

Starting with kernel 4.12, the hash page table geometry is updated to accommodate larger VA range. Update here accordingly. Signed-off-by: Hari Bathini <hbathini(a)linux.vnet.ibm.com&gt; --- changes in v1: * Kernel commit 92d9dfda8b54 reverted the geometry update for 4K hash pagetable. So, undo'ing 4K pagesize changes.

defs.h | 3 +++ ppc64.c | 12 +++++++++--- 2 files changed, 12 insertions(+), 3 deletions(-) diff --git a/defs.h b/defs.h index 18f36b3..9132075 100644 --- a/defs.h +++ b/defs.h @@ -3915,6 +3915,9 @@ struct efi_memory_desc_t { #define PGD_INDEX_SIZE_L4_64K_3_10 12 #define PMD_INDEX_SIZE_L4_64K_4_6 5 #define PUD_INDEX_SIZE_L4_64K_4_6 5 +#define PMD_INDEX_SIZE_L4_64K_4_12 10 +#define PUD_INDEX_SIZE_L4_64K_4_12 7 +#define PGD_INDEX_SIZE_L4_64K_4_12 8 #define PTE_INDEX_SIZE_RADIX_64K 5 #define PMD_INDEX_SIZE_RADIX_64K 9 #define PUD_INDEX_SIZE_RADIX_64K 9 diff --git a/ppc64.c b/ppc64.c index 84cec09..672ee60 100644 --- a/ppc64.c +++ b/ppc64.c @@ -447,10 +447,16 @@ ppc64_init(int when) } else if (!(machdep->flags & BOOK3E) && (THIS_KERNEL_VERSION >= LINUX(4,6,0))) { m->l1_index_size = PTE_INDEX_SIZE_L4_64K_3_10; - m->l2_index_size = PMD_INDEX_SIZE_L4_64K_4_6; - m->l3_index_size = PUD_INDEX_SIZE_L4_64K_4_6; - m->l4_index_size = PGD_INDEX_SIZE_L4_64K_3_10; + if (THIS_KERNEL_VERSION >= LINUX(4,12,0)) { + m->l2_index_size = PMD_INDEX_SIZE_L4_64K_4_12; + m->l3_index_size = PUD_INDEX_SIZE_L4_64K_4_12; + m->l4_index_size = PGD_INDEX_SIZE_L4_64K_4_12; + } else { + m->l2_index_size = PMD_INDEX_SIZE_L4_64K_4_6; + m->l3_index_size = PUD_INDEX_SIZE_L4_64K_4_6; + m->l4_index_size = PGD_INDEX_SIZE_L4_64K_3_10; + } } else if (THIS_KERNEL_VERSION >= LINUX(3,10,0)) { m->l1_index_size = PTE_INDEX_SIZE_L4_64K_3_10; m->l2_index_size = PMD_INDEX_SIZE_L4_64K_3_10;