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| author | Kristina Martsenko <kristina.martsenko@arm.com> | 2017-12-13 20:07:19 +0300 |
|---|---|---|
| committer | Catalin Marinas <catalin.marinas@arm.com> | 2017-12-22 20:35:55 +0300 |
| commit | e6d588a8e3da24ea51321279a064b97feb502ef0 (patch) | |
| tree | f2d139841fd94a8479f6f608be311005e5edbec6 /arch/arm64/include/asm/pgtable-hwdef.h | |
| parent | 529c4b05a3cb2f324aac347042ee6d641478e946 (diff) | |
| download | linux-e6d588a8e3da24ea51321279a064b97feb502ef0.tar.xz | |
arm64: head.S: handle 52-bit PAs in PTEs in early page table setup
The top 4 bits of a 52-bit physical address are positioned at bits
12..15 in page table entries. Introduce a macro to move the bits there,
and change the early ID map and swapper table setup code to use it.
Tested-by: Suzuki K Poulose <suzuki.poulose@arm.com>
Reviewed-by: Suzuki K Poulose <suzuki.poulose@arm.com>
Reviewed-by: Marc Zyngier <marc.zyngier@arm.com>
Tested-by: Bob Picco <bob.picco@oracle.com>
Reviewed-by: Bob Picco <bob.picco@oracle.com>
Signed-off-by: Kristina Martsenko <kristina.martsenko@arm.com>
[catalin.marinas@arm.com: additional comments for clarification]
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Diffstat (limited to 'arch/arm64/include/asm/pgtable-hwdef.h')
| -rw-r--r-- | arch/arm64/include/asm/pgtable-hwdef.h | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/arch/arm64/include/asm/pgtable-hwdef.h b/arch/arm64/include/asm/pgtable-hwdef.h index f92be11a209a..5513ccd687f4 100644 --- a/arch/arm64/include/asm/pgtable-hwdef.h +++ b/arch/arm64/include/asm/pgtable-hwdef.h @@ -168,6 +168,12 @@ #define PTE_UXN (_AT(pteval_t, 1) << 54) /* User XN */ #define PTE_HYP_XN (_AT(pteval_t, 1) << 54) /* HYP XN */ +#ifdef CONFIG_ARM64_PA_BITS_52 +#define PTE_ADDR_LOW (((_AT(pteval_t, 1) << (48 - PAGE_SHIFT)) - 1) << PAGE_SHIFT) +#define PTE_ADDR_HIGH (_AT(pteval_t, 0xf) << 12) +#define PTE_ADDR_MASK_52 (PTE_ADDR_LOW | PTE_ADDR_HIGH) +#endif + /* * AttrIndx[2:0] encoding (mapping attributes defined in the MAIR* registers). */ |