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| author | Steve Capper <steve.capper@arm.com> | 2019-08-07 17:55:22 +0200 |
|---|---|---|
| committer | Will Deacon <will@kernel.org> | 2019-08-09 12:17:26 +0200 |
| commit | b6d00d47e81a49f6cf462518c10408f37a3e6785 (patch) | |
| tree | f84df6281b176ab0f3c2fea47d8b9ef233f15b6a /arch/arm64/include/asm/memory.h | |
| parent | arm64: mm: Modify calculation of VMEMMAP_SIZE (diff) | |
| download | linux-b6d00d47e81a49f6cf462518c10408f37a3e6785.tar.xz linux-b6d00d47e81a49f6cf462518c10408f37a3e6785.zip | |
arm64: mm: Introduce 52-bit Kernel VAs
Most of the machinery is now in place to enable 52-bit kernel VAs that
are detectable at boot time.
This patch adds a Kconfig option for 52-bit user and kernel addresses
and plumbs in the requisite CONFIG_ macros as well as sets TCR.T1SZ,
physvirt_offset and vmemmap at early boot.
To simplify things this patch also removes the 52-bit user/48-bit kernel
kconfig option.
Signed-off-by: Steve Capper <steve.capper@arm.com>
Reviewed-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Will Deacon <will@kernel.org>
Diffstat (limited to 'arch/arm64/include/asm/memory.h')
| -rw-r--r-- | arch/arm64/include/asm/memory.h | 7 |
1 files changed, 4 insertions, 3 deletions
diff --git a/arch/arm64/include/asm/memory.h b/arch/arm64/include/asm/memory.h index 0204c2006c92..d911d0573460 100644 --- a/arch/arm64/include/asm/memory.h +++ b/arch/arm64/include/asm/memory.h @@ -44,8 +44,9 @@ * VA_START - the first kernel virtual address. */ #define VA_BITS (CONFIG_ARM64_VA_BITS) -#define PAGE_OFFSET (UL(0xffffffffffffffff) - \ - (UL(1) << VA_BITS) + 1) +#define _PAGE_OFFSET(va) (UL(0xffffffffffffffff) - \ + (UL(1) << (va)) + 1) +#define PAGE_OFFSET (_PAGE_OFFSET(VA_BITS)) #define KIMAGE_VADDR (MODULES_END) #define BPF_JIT_REGION_START (KASAN_SHADOW_END) #define BPF_JIT_REGION_SIZE (SZ_128M) @@ -68,7 +69,7 @@ #define KERNEL_START _text #define KERNEL_END _end -#ifdef CONFIG_ARM64_USER_VA_BITS_52 +#ifdef CONFIG_ARM64_VA_BITS_52 #define MAX_USER_VA_BITS 52 #else #define MAX_USER_VA_BITS VA_BITS |