Messages in this thread | | | Subject | Re: [PATCH v6 3/4] arm64: mm: support ARCH_MMAP_RND_BITS. | From | Daniel Cashman <> | Date | Mon, 14 Dec 2015 12:45:17 -0800 |
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On 12/14/2015 03:19 AM, Will Deacon wrote: >> +# max bits determined by the following formula: >> +# VA_BITS - PAGE_SHIFT - 3 > > Now that we have this comment, I think we can drop the unsupported > combinations from the list below. That means we just end up with: > >> +config ARCH_MMAP_RND_BITS_MAX >> + default 19 if ARM64_VA_BITS=36 >> + default 24 if ARM64_VA_BITS=39 >> + default 27 if ARM64_VA_BITS=42 >> + default 30 if ARM64_VA_BITS=47 >> + default 29 if ARM64_VA_BITS=48 && ARM64_64K_PAGES >> + default 31 if ARM64_VA_BITS=48 && ARM64_16K_PAGES >> + default 33 if ARM64_VA_BITS=48
Unless you object, I'd like to keep the last 3 as well, to mirror the min bits, should any new configurations be added but not reflected here: + default 15 if ARM64_64K_PAGES + default 17 if ARM64_16K_PAGES + default 18
The first two of these three should be changed as well to 14 and 16.
Thanks, Dan
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