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arm64 fix:
- Ensure struct page array fits within vmemmap area -----BEGIN PGP SIGNATURE----- Version: GnuPG v1 iQEcBAABAgAGBQJW1NaCAAoJELescNyEwWM0Sl8H/3jJiGQixMLmjdfUsZVrtdk5 0Smn4HKYxv3AV2WQ6+miOquOhMz3xrGIHaOf1Zf4GSo3n02drq3pmHqrM2muBpp5 tmw9Q36dApXKIztpBQDqk7yCEpY7rELtIjvaOjta3OOLFbBnTsdGdkp+EWEn6m1g NJ6Cnw96KMHnivbwLpVzbeRQni9E+oJIhpv4p/wy5gSTqMCdJIBsfK3/uv3rszLZ O70F6+ZL9a2wUc4SnSUESpEuFmwoZHWROlZreZlHXQzmuyqpYIJK/JxBMaaz2yC/ 2L2k3kEmgfRwxjh5Jcp5yzKxCJH0ZUYYGoDKoDaIb8iP3SrlTlfp8jBorANIxcY= =dfNx -----END PGP SIGNATURE----- Merge tag 'arm64-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux Pull arm64 fix from Will Deacon: "Arm64 fix for -rc7. Without it, our struct page array can overflow the vmemmap region on systems with a large PHYS_OFFSET. Nothing else on the radar at the moment, so hopefully that's it for 4.5 from us. Summary: Ensure struct page array fits within vmemmap area" * tag 'arm64-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux: arm64: vmemmap: use virtual projection of linear region
This commit is contained in:
commit
ed385c7a17
2 changed files with 6 additions and 5 deletions
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@ -34,13 +34,13 @@
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/*
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* VMALLOC and SPARSEMEM_VMEMMAP ranges.
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*
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* VMEMAP_SIZE: allows the whole VA space to be covered by a struct page array
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* VMEMAP_SIZE: allows the whole linear region to be covered by a struct page array
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* (rounded up to PUD_SIZE).
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* VMALLOC_START: beginning of the kernel VA space
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* VMALLOC_END: extends to the available space below vmmemmap, PCI I/O space,
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* fixed mappings and modules
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*/
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#define VMEMMAP_SIZE ALIGN((1UL << (VA_BITS - PAGE_SHIFT)) * sizeof(struct page), PUD_SIZE)
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#define VMEMMAP_SIZE ALIGN((1UL << (VA_BITS - PAGE_SHIFT - 1)) * sizeof(struct page), PUD_SIZE)
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#ifndef CONFIG_KASAN
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#define VMALLOC_START (VA_START)
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@ -51,7 +51,8 @@
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#define VMALLOC_END (PAGE_OFFSET - PUD_SIZE - VMEMMAP_SIZE - SZ_64K)
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#define vmemmap ((struct page *)(VMALLOC_END + SZ_64K))
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#define VMEMMAP_START (VMALLOC_END + SZ_64K)
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#define vmemmap ((struct page *)VMEMMAP_START - (memstart_addr >> PAGE_SHIFT))
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#define FIRST_USER_ADDRESS 0UL
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@ -319,8 +319,8 @@ void __init mem_init(void)
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#endif
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MLG(VMALLOC_START, VMALLOC_END),
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#ifdef CONFIG_SPARSEMEM_VMEMMAP
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MLG((unsigned long)vmemmap,
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(unsigned long)vmemmap + VMEMMAP_SIZE),
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MLG(VMEMMAP_START,
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VMEMMAP_START + VMEMMAP_SIZE),
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MLM((unsigned long)virt_to_page(PAGE_OFFSET),
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(unsigned long)virt_to_page(high_memory)),
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#endif
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