arm64: mm: Move ASID from TTBR0 to TTBR1

[mirror_ubuntu-artful-kernel.git] / arch / arm64 / mm / proc.S

diff --git a/arch/arm64/mm/proc.S b/arch/arm64/mm/proc.S
index 877d42fb0df655c77a8fe3f0f7f517d9aa7c9247..0bd7550b72301d4bb6d4ba071bd5ab899c0f7baa 100644 (file)
--- a/arch/arm64/mm/proc.S
+++ b/arch/arm64/mm/proc.S
@@ -139,9 +139,12 @@ ENDPROC(cpu_do_resume)
  */
 ENTRY(cpu_do_switch_mm)
        pre_ttbr0_update_workaround x0, x2, x3
+       mrs     x2, ttbr1_el1
        mmid    x1, x1                          // get mm->context.id
-       bfi     x0, x1, #48, #16                // set the ASID
-       msr     ttbr0_el1, x0                   // set TTBR0
+       bfi     x2, x1, #48, #16                // set the ASID
+       msr     ttbr1_el1, x2                   // in TTBR1 (since TCR.A1 is set)
+       isb
+       msr     ttbr0_el1, x0                   // now update TTBR0
        isb
        post_ttbr0_update_workaround
        ret
@@ -225,7 +228,7 @@ ENTRY(__cpu_setup)
         * both user and kernel.
         */
        ldr     x10, =TCR_TxSZ(VA_BITS) | TCR_CACHE_FLAGS | TCR_SMP_FLAGS | \
-                       TCR_TG_FLAGS | TCR_ASID16 | TCR_TBI0
+                       TCR_TG_FLAGS | TCR_ASID16 | TCR_TBI0 | TCR_A1
        tcr_set_idmap_t0sz      x10, x9
 
        /*