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arm64: use correct register width when retrieving ASID

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The ASID is represented as an unsigned int in mm_context_t and we
currently use the mmid assembler macro to access this element of the
struct. This should be accessed with a register of 32-bit width. If
the incorrect register width is used the ASID will be returned in
bits[32:63] of the register when running under big-endian.

Fix a use of the mmid macro in tlb.S to use a 32-bit access.

Signed-off-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Matthew Leach <matthew.leach@arm.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
This commit is contained in:
Matthew Leach 2013-09-25 16:33:13 +01:00 committed by Catalin Marinas
parent 1f65c13efe
commit fc18047c73
1 changed files with 1 additions and 1 deletions
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2
arch/arm64/mm/tlb.S
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@ -35,7 +35,7 @@
*/ */
ENTRY(__cpu_flush_user_tlb_range) ENTRY(__cpu_flush_user_tlb_range)
vma_vm_mm x3, x2 // get vma->vm_mm vma_vm_mm x3, x2 // get vma->vm_mm
mmid x3, x3 // get vm_mm->context.id mmid w3, x3 // get vm_mm->context.id
dsb sy dsb sy
lsr x0, x0, #12 // align address lsr x0, x0, #12 // align address
lsr x1, x1, #12 lsr x1, x1, #12