Balbir Singh <bsinghar...@gmail.com> writes: > On Wed, 2017-04-05 at 10:49 +0530, Anshuman Khandual wrote: >> diff --git a/arch/powerpc/include/uapi/asm/mman.h >> b/arch/powerpc/include/uapi/asm/mman.h >> index 03c06ba..3eb788c 100644 >> --- a/arch/powerpc/include/uapi/asm/mman.h >> +++ b/arch/powerpc/include/uapi/asm/mman.h >> @@ -29,4 +29,9 @@ >> #define MAP_STACK 0x20000 /* give out an address that is best >> suited for process/thread stacks */ >> #define MAP_HUGETLB 0x40000 /* create a huge page mapping */ >> >> +#define MAP_HUGE_2MB (21 << MAP_HUGE_SHIFT) /* 2MB HugeTLB Page */ >> +#define MAP_HUGE_16MB (24 << MAP_HUGE_SHIFT) /* 16MB HugeTLB Page */ >> +#define MAP_HUGE_1GB (30 << MAP_HUGE_SHIFT) /* 1GB HugeTLB Page */ >> +#define MAP_HUGE_16GB (34 << MAP_HUGE_SHIFT) /* 16GB HugeTLB Page */ >> + >> #endif /* _UAPI_ASM_POWERPC_MMAN_H */ > > We may want to call out what MMU supports what size, so that an error can > be interpreted from the header file comments.
No don't, it can depend on what's configured in Linux and/or hypervisor config and/or firmware and so on, so any header file comments are most likely just going to be misleading and/or out of date. cheers
