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| author | Aneesh Kumar K.V <aneesh.kumar@linux.ibm.com> | 2019-07-01 17:34:42 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2019-09-21 08:15:27 +0300 |
| commit | 0e65f24904e219ba718d36498a2b1e69cb3fb149 (patch) | |
| tree | 743bdd908ff86b43c9f679eadad24b950ba1cafd /arch/powerpc/mm | |
| parent | 551649e587e7ce4682cd2a60a20bc8aafa1c9103 (diff) | |
| download | linux-0e65f24904e219ba718d36498a2b1e69cb3fb149.tar.xz | |
powerpc/mm/radix: Use the right page size for vmemmap mapping
commit 89a3496e0664577043666791ec07fb731d57c950 upstream.
We use mmu_vmemmap_psize to find the page size for mapping the vmmemap area.
With radix translation, we are suboptimally setting this value to PAGE_SIZE.
We do check for 2M page size support and update mmu_vmemap_psize to use
hugepage size but we suboptimally reset the value to PAGE_SIZE in
radix__early_init_mmu(). This resulted in always mapping vmemmap area with
64K page size.
Fixes: 2bfd65e45e87 ("powerpc/mm/radix: Add radix callbacks for early init routines")
Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'arch/powerpc/mm')
| -rw-r--r-- | arch/powerpc/mm/pgtable-radix.c | 16 |
1 files changed, 7 insertions, 9 deletions
diff --git a/arch/powerpc/mm/pgtable-radix.c b/arch/powerpc/mm/pgtable-radix.c index 17ae5c15a9e0..ba02305f121e 100644 --- a/arch/powerpc/mm/pgtable-radix.c +++ b/arch/powerpc/mm/pgtable-radix.c @@ -442,14 +442,6 @@ void __init radix__early_init_devtree(void) mmu_psize_defs[MMU_PAGE_64K].shift = 16; mmu_psize_defs[MMU_PAGE_64K].ap = 0x5; found: -#ifdef CONFIG_SPARSEMEM_VMEMMAP - if (mmu_psize_defs[MMU_PAGE_2M].shift) { - /* - * map vmemmap using 2M if available - */ - mmu_vmemmap_psize = MMU_PAGE_2M; - } -#endif /* CONFIG_SPARSEMEM_VMEMMAP */ return; } @@ -527,7 +519,13 @@ void __init radix__early_init_mmu(void) #ifdef CONFIG_SPARSEMEM_VMEMMAP /* vmemmap mapping */ - mmu_vmemmap_psize = mmu_virtual_psize; + if (mmu_psize_defs[MMU_PAGE_2M].shift) { + /* + * map vmemmap using 2M if available + */ + mmu_vmemmap_psize = MMU_PAGE_2M; + } else + mmu_vmemmap_psize = mmu_virtual_psize; #endif /* * initialize page table size |