[PATCH 07/16] powerpc: mm: Support MAP_BELOW_HINT
Charlie Jenkins <[email protected]>
| Newsgroups | gmane.linux.ports.sh.devel,gmane.linux.kernel.cross-arch,gmane.linux.kernel,gmane.linux.ports.riscv,gmane.linux.ports.arm.kernel,gmane.linux.ports.ppc64.devel,gmane.linux.kernel.mm,gmane.linux.ports.mips,gmane.linux.ports.parisc,gmane.linux.ports.sparc |
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| Message-ID | <[email protected]> |
Add support for MAP_BELOW_HINT to arch_get_mmap_base() and arch_get_mmap_end(). Signed-off-by: Charlie Jenkins <[email protected]> --- arch/powerpc/include/asm/task_size_64.h | 36 +++++++++++++++++++++++++++------ 1 file changed, 30 insertions(+), 6 deletions(-) diff --git a/arch/powerpc/include/asm/task_size_64.h b/arch/powerpc/include/asm/task_size_64.h index 239b363841aa..a37a5a81365d 100644 --- a/arch/powerpc/include/asm/task_size_64.h +++ b/arch/powerpc/include/asm/task_size_64.h @@ -72,12 +72,36 @@ #define STACK_TOP_MAX TASK_SIZE_USER64 #define STACK_TOP (is_32bit_task() ? STACK_TOP_USER32 : STACK_TOP_USER64) -#define arch_get_mmap_base(addr, len, base, flags) \ - (((addr) > DEFAULT_MAP_WINDOW) ? (base) + TASK_SIZE - DEFAULT_MAP_WINDOW : (base)) +#define arch_get_mmap_base(addr, len, base, flags) \ +({ \ + unsigned long mmap_base; \ + typeof(flags) _flags = (flags); \ + typeof(addr) _addr = (addr); \ + typeof(base) _base = (base); \ + typeof(len) _len = (len); \ + unsigned long rnd_gap = DEFAULT_MAP_WINDOW - (_base); \ + if (_flags & MAP_BELOW_HINT && _addr != 0 && ((_addr + _len) > BIT(VA_BITS - 1)))\ + mmap_base = (_addr + _len) - rnd_gap; \ + else \ + mmap_end = ((_addr > DEFAULT_MAP_WINDOW) ? \ + _base + TASK_SIZE - DEFAULT_MAP_WINDOW : \ + _base); \ + mmap_end; \ +}) -#define arch_get_mmap_end(addr, len, flags) \ - (((addr) > DEFAULT_MAP_WINDOW) || \ - (((flags) & MAP_FIXED) && ((addr) + (len) > DEFAULT_MAP_WINDOW)) ? TASK_SIZE : \ - DEFAULT_MAP_WINDOW) +#define arch_get_mmap_end(addr, len, flags) \ +({ \ + unsigned long mmap_end; \ + typeof(flags) _flags = (flags); \ + typeof(addr) _addr = (addr); \ + typeof(len) _len = (len); \ + if (_flags & MAP_BELOW_HINT && _addr != 0 && ((_addr + _len) > BIT(VA_BITS - 1))) \ + mmap_end = (_addr + _len); \ + else \ + mmap_end = (((_addr) > DEFAULT_MAP_WINDOW) || \ + (((_flags) & MAP_FIXED) && ((_addr) + (_len) > DEFAULT_MAP_WINDOW))\ + ? TASK_SIZE : DEFAULT_MAP_WINDOW) \ + mmap_end; \ +}) #endif /* _ASM_POWERPC_TASK_SIZE_64_H */ -- 2.45.0