arm64: use correct register width when retrieving ASID

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>

diff --git a/arch/arm64/mm/tlb.S b/arch/arm64/mm/tlb.S
index 8ae80a18e8ecbf18acd29a0aed49c70d5ecbdbea..19da91e0cd278911ec8400449d199325e528f00b 100644 (file)
--- a/arch/arm64/mm/tlb.S
+++ b/arch/arm64/mm/tlb.S
@@ -35,7 +35,7 @@
  */
 ENTRY(__cpu_flush_user_tlb_range)
        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
        lsr     x0, x0, #12                     // align address
        lsr     x1, x1, #12