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| author | Aneesh Kumar K.V <aneesh.kumar@linux.ibm.com> | 2018-09-20 21:09:42 +0300 |
|---|---|---|
| committer | Michael Ellerman <mpe@ellerman.id.au> | 2018-10-03 08:39:58 +0300 |
| commit | da7ad366b497f5fc1d4a416f168057ba40bddb98 (patch) | |
| tree | 2d8a123162eb61a0adbac9a0b16c6664c429611e /arch/powerpc/mm/hash_utils_64.c | |
| parent | 8139046a5a34787849df81f4a5875cf4b404a7a1 (diff) | |
| download | linux-da7ad366b497f5fc1d4a416f168057ba40bddb98.tar.xz | |
powerpc/mm/book3s: Update pmd_present to look at _PAGE_PRESENT bit
With this patch we use 0x8000000000000000UL (_PAGE_PRESENT) to indicate a valid
pgd/pud/pmd entry. We also switch the p**_present() to look at this bit.
With pmd_present, we have a special case. We need to make sure we consider a
pmd marked invalid during THP split as present. Right now we clear the
_PAGE_PRESENT bit during a pmdp_invalidate. Inorder to consider this special
case we add a new pte bit _PAGE_INVALID (mapped to _RPAGE_SW0). This bit is
only used with _PAGE_PRESENT cleared. Hence we are not really losing a pte bit
for this special case. pmd_present is also updated to look at _PAGE_INVALID.
Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Diffstat (limited to 'arch/powerpc/mm/hash_utils_64.c')
| -rw-r--r-- | arch/powerpc/mm/hash_utils_64.c | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/arch/powerpc/mm/hash_utils_64.c b/arch/powerpc/mm/hash_utils_64.c index f23a89d8e4ce..8ff03c7205a0 100644 --- a/arch/powerpc/mm/hash_utils_64.c +++ b/arch/powerpc/mm/hash_utils_64.c @@ -1001,9 +1001,9 @@ void __init hash__early_init_mmu(void) * 4k use hugepd format, so for hash set then to * zero */ - __pmd_val_bits = 0; - __pud_val_bits = 0; - __pgd_val_bits = 0; + __pmd_val_bits = HASH_PMD_VAL_BITS; + __pud_val_bits = HASH_PUD_VAL_BITS; + __pgd_val_bits = HASH_PGD_VAL_BITS; __kernel_virt_start = H_KERN_VIRT_START; __kernel_virt_size = H_KERN_VIRT_SIZE; |