[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] Re: [Xen-devel] [PATCH v6 02/14] arm/mem_access: Move PAGE_*_* macros to xen/page-defs.h
Hi Jan, On 07/06/2017 02:10 PM, Jan Beulich wrote: >>>> On 06.07.17 at 13:50, <proskurin@xxxxxxxxxxxxx> wrote: >> --- /dev/null >> +++ b/xen/include/xen/page-defs.h >> @@ -0,0 +1,24 @@ >> +#ifndef __XEN_PAGE_DEFS_H__ >> +#define __XEN_PAGE_DEFS_H__ >> + >> +/* Helpers for different page granularities. */ >> +#define PAGE_SIZE_GRAN(gran) (1UL << PAGE_SHIFT_##gran) >> +#define PAGE_MASK_GRAN(gran) (~(0ULL) << PAGE_SHIFT_##gran) > Stray parentheses. I'm also unhappy about the type difference > between size and mask. I guess both would best be paddr_t. > That'll then also allow mask to be defined as -size. Another > alternative would be to use 1L for size, thus guaranteeing > suitable sign extension when used in contexts requiring a width > wider than long. > Sounds reasonable. How about using 1L for PAGE_SIZE_GRAN to ensure a suitable sign extension for types wider than long and ~((paddr_t)0) for PAGE_MASK_GRAN? >> +#define PAGE_ALIGN_GRAN(gran, addr) (((addr) + ~PAGE_MASK_##gran) & >> PAGE_MASK_##gran) >> + >> +#define PAGE_SHIFT_4K (12) > Stray parentheses again. > > Also, with you adding a new header that'll fall under REST > maintainership, you should have Cc-ed all the REST maintainers > imo. Thank you for adding the REST maintainers in Cc. In addition, I have included Konrad Rzeszutek Wilk and Julien Grall. Cheers, ~Sergej _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxx https://lists.xen.org/xen-devel
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