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authorAneesh Kumar K.V <aneesh.kumar@linux.ibm.com>2019-04-17 15:59:14 +0300
committerMichael Ellerman <mpe@ellerman.id.au>2019-04-21 16:12:39 +0300
commit0034d395f89d9c092bb15adbabdca5283e258b41 (patch)
treee5850612e6ada1285b19b21a21722fb2ea95b43e /drivers/misc/cxl
parenta35a3c6f60657812366fca86a9ce71df1b8f7aff (diff)
downloadlinux-0034d395f89d9c092bb15adbabdca5283e258b41.tar.xz
powerpc/mm/hash64: Map all the kernel regions in the same 0xc range
This patch maps vmalloc, IO and vmemap regions in the 0xc address range instead of the current 0xd and 0xf range. This brings the mapping closer to radix translation mode. With hash 64K page size each of this region is 512TB whereas with 4K config we are limited by the max page table range of 64TB and hence there regions are of 16TB size. The kernel mapping is now: On 4K hash kernel_region_map_size = 16TB kernel vmalloc start = 0xc000100000000000 kernel IO start = 0xc000200000000000 kernel vmemmap start = 0xc000300000000000 64K hash, 64K radix and 4k radix: kernel_region_map_size = 512TB kernel vmalloc start = 0xc008000000000000 kernel IO start = 0xc00a000000000000 kernel vmemmap start = 0xc00c000000000000 Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.ibm.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Diffstat (limited to 'drivers/misc/cxl')
-rw-r--r--drivers/misc/cxl/fault.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/misc/cxl/fault.c b/drivers/misc/cxl/fault.c
index dc7b34174f85..a4d17a5a9763 100644
--- a/drivers/misc/cxl/fault.c
+++ b/drivers/misc/cxl/fault.c
@@ -168,7 +168,7 @@ int cxl_handle_mm_fault(struct mm_struct *mm, u64 dsisr, u64 dar)
if (dsisr & CXL_PSL_DSISR_An_S)
access |= _PAGE_WRITE;
- if (!mm && (REGION_ID(dar) != USER_REGION_ID))
+ if (!mm && (get_region_id(dar) != USER_REGION_ID))
access |= _PAGE_PRIVILEGED;
if (dsisr & DSISR_NOHPTE)