File crash-ppc64-book3s-update-hash-page-table-geome... of Package crash

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File crash-ppc64-book3s-update-hash-page-table-geometry.patch of Package crash (Revision 5020316835f9388dda814283845af986)

Currently displaying revision 5020316835f9388dda814283845af986 , Show latest

Update for support of Linux 4.14 and later PPC64 kernels where the

From: Dave Anderson <anderson@redhat.com>

hash page table geometry accomodates a larger virtual address range.
Without the patch, the virtual-to-physical translation of user space
virtual addresses by "vm -p", "vtop", and "rd -u" may generate an
invalid translation or otherwise fail.
(hbathini@linux.vnet.ibm.com)
---
 defs.h  |    3 +++
 ppc64.c |   12 +++++++++---
 2 files changed, 12 insertions(+), 3 deletions(-)

diff --git a/defs.h b/defs.h
index 154a5b9..f2c3f50 100644
--- a/defs.h
+++ b/defs.h
@@ -3857,6 +3857,9 @@ 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 edf46dc..77ac09f 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;

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File crash-ppc64-book3s-update-hash-page-table-geometry.patch of Package crash (Revision 5020316835f9388dda814283845af986)

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