diff options
| author | Will Deacon <will.deacon@arm.com> | 2017-08-10 15:19:09 +0300 |
|---|---|---|
| committer | Will Deacon <will.deacon@arm.com> | 2017-12-11 16:40:25 +0300 |
| commit | 7655abb953860485940d4de74fb45a8192149bb6 (patch) | |
| tree | 7a4e23ca3f04429b70898608c8db7a9b929fbfec /arch/arm64/include/asm/pgtable-hwdef.h | |
| parent | 376133b7edc20f237a42e4c72415cc9e8c0a9704 (diff) | |
| download | linux-7655abb953860485940d4de74fb45a8192149bb6.tar.xz | |
arm64: mm: Move ASID from TTBR0 to TTBR1
In preparation for mapping kernelspace and userspace with different
ASIDs, move the ASID to TTBR1 and update switch_mm to context-switch
TTBR0 via an invalid mapping (the zero page).
Reviewed-by: Mark Rutland <mark.rutland@arm.com>
Tested-by: Laura Abbott <labbott@redhat.com>
Tested-by: Shanker Donthineni <shankerd@codeaurora.org>
Signed-off-by: Will Deacon <will.deacon@arm.com>
Diffstat (limited to 'arch/arm64/include/asm/pgtable-hwdef.h')
| -rw-r--r-- | arch/arm64/include/asm/pgtable-hwdef.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/arch/arm64/include/asm/pgtable-hwdef.h b/arch/arm64/include/asm/pgtable-hwdef.h index eb0c2bd90de9..8df4cb6ac6f7 100644 --- a/arch/arm64/include/asm/pgtable-hwdef.h +++ b/arch/arm64/include/asm/pgtable-hwdef.h @@ -272,6 +272,7 @@ #define TCR_TG1_4K (UL(2) << TCR_TG1_SHIFT) #define TCR_TG1_64K (UL(3) << TCR_TG1_SHIFT) +#define TCR_A1 (UL(1) << 22) #define TCR_ASID16 (UL(1) << 36) #define TCR_TBI0 (UL(1) << 37) #define TCR_HA (UL(1) << 39) |