diff options
Diffstat (limited to 'arch/arm64/mm/proc.S')
| -rw-r--r-- | arch/arm64/mm/proc.S | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/arch/arm64/mm/proc.S b/arch/arm64/mm/proc.S index 39139a3aa16d..a8be513dff6f 100644 --- a/arch/arm64/mm/proc.S +++ b/arch/arm64/mm/proc.S @@ -196,6 +196,19 @@ ENTRY(__cpu_setup) */ mrs x9, ID_AA64MMFR0_EL1 bfi x10, x9, #32, #3 +#ifdef CONFIG_ARM64_HW_AFDBM + /* + * Hardware update of the Access and Dirty bits. + */ + mrs x9, ID_AA64MMFR1_EL1 + and x9, x9, #0xf + cbz x9, 2f + cmp x9, #2 + b.lt 1f + orr x10, x10, #TCR_HD // hardware Dirty flag update +1: orr x10, x10, #TCR_HA // hardware Access flag update +2: +#endif /* CONFIG_ARM64_HW_AFDBM */ msr tcr_el1, x10 ret // return to head.S ENDPROC(__cpu_setup) |