| Message ID | 20181114133920.7134-4-steve.capper@arm.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | 52-bit userspace VAs | expand |
On Wed, Nov 14, 2018 at 01:39:18PM +0000, Steve Capper wrote: > Now that we have DEFAULT_MAP_WINDOW defined, we can arch_get_mmap_end > and arch_get_mmap_base helpers to allow for high addresses in mmap. > > Signed-off-by: Steve Capper <steve.capper@arm.com> Reviewed-by: Catalin Marinas <catalin.marinas@arm.com>
On Tue, Nov 27, 2018 at 05:10:18PM +0000, Catalin Marinas wrote: > On Wed, Nov 14, 2018 at 01:39:18PM +0000, Steve Capper wrote: > > Now that we have DEFAULT_MAP_WINDOW defined, we can arch_get_mmap_end > > and arch_get_mmap_base helpers to allow for high addresses in mmap. > > > > Signed-off-by: Steve Capper <steve.capper@arm.com> > > Reviewed-by: Catalin Marinas <catalin.marinas@arm.com> Thanks!
diff --git a/arch/arm64/include/asm/processor.h b/arch/arm64/include/asm/processor.h index da41a2655b69..bbe602cb8fd3 100644 --- a/arch/arm64/include/asm/processor.h +++ b/arch/arm64/include/asm/processor.h @@ -72,6 +72,13 @@ #define STACK_TOP STACK_TOP_MAX #endif /* CONFIG_COMPAT */ +#define arch_get_mmap_end(addr) ((addr > DEFAULT_MAP_WINDOW) ? TASK_SIZE :\ + DEFAULT_MAP_WINDOW) + +#define arch_get_mmap_base(addr, base) ((addr > DEFAULT_MAP_WINDOW) ? \ + base + TASK_SIZE - DEFAULT_MAP_WINDOW :\ + base) + extern phys_addr_t arm64_dma_phys_limit; #define ARCH_LOW_ADDRESS_LIMIT (arm64_dma_phys_limit - 1)
Now that we have DEFAULT_MAP_WINDOW defined, we can arch_get_mmap_end and arch_get_mmap_base helpers to allow for high addresses in mmap. Signed-off-by: Steve Capper <steve.capper@arm.com> --- arch/arm64/include/asm/processor.h | 7 +++++++ 1 file changed, 7 insertions(+)