From: Aneesh Kumar K.V Date: Mon, 1 Jul 2019 14:34:42 +0000 (+0530) Subject: powerpc/mm/radix: Use the right page size for vmemmap mapping X-Git-Tag: v4.14.146~57 X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=0e65f24904e219ba718d36498a2b1e69cb3fb149;p=thirdparty%2Fkernel%2Fstable.git 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 Signed-off-by: Michael Ellerman Signed-off-by: Greg Kroah-Hartman --- diff --git a/arch/powerpc/mm/pgtable-radix.c b/arch/powerpc/mm/pgtable-radix.c index 17ae5c15a9e06..ba02305f121e1 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