diff options
| author | Will Deacon <will.deacon@arm.com> | 2017-08-10 14:10:28 +0100 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@google.com> | 2018-01-06 11:09:28 +0100 |
| commit | 290ef683657ca5738372cc669e80d6a89f000fb2 (patch) | |
| tree | 8bb2c8c247e9ad1530288845041f446346658979 /arch/arm64/include/asm | |
| parent | d99c809e7f5d0e769d81a7648a664655c9b6d42d (diff) | |
FROMLIST: arm64: mm: Allocate ASIDs in pairs
In preparation for separate kernel/user ASIDs, allocate them in pairs
for each mm_struct. The bottom bit distinguishes the two: if it is set,
then the ASID will map only userspace.
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>
(cherry picked from git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git
commit 0c8ea531b7740754cf374ca8b7510655f569c5e3)
Change-Id: I283c99292b165e04ff1b6b9cb5806805974ae915
[ghackmann@google.com: adjust context]
Signed-off-by: Greg Hackmann <ghackmann@google.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
Diffstat (limited to 'arch/arm64/include/asm')
| -rw-r--r-- | arch/arm64/include/asm/mmu.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/arch/arm64/include/asm/mmu.h b/arch/arm64/include/asm/mmu.h index 990124a67eeb..be814d4f71cb 100644 --- a/arch/arm64/include/asm/mmu.h +++ b/arch/arm64/include/asm/mmu.h @@ -16,6 +16,8 @@ #ifndef __ASM_MMU_H #define __ASM_MMU_H +#define USER_ASID_FLAG (UL(1) << 48) + typedef struct { atomic64_t id; void *vdso; |