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-rw-r--r--arch/arm64/mm/proc.S8
1 files changed, 7 insertions, 1 deletions
diff --git a/arch/arm64/mm/proc.S b/arch/arm64/mm/proc.S
index e0ef63cd05dc..e085ee6ef4e2 100644
--- a/arch/arm64/mm/proc.S
+++ b/arch/arm64/mm/proc.S
@@ -209,8 +209,14 @@ ENTRY(__cpu_setup)
* Set/prepare TCR and TTBR. We use 512GB (39-bit) address range for
* both user and kernel.
*/
- ldr x10, =TCR_TxSZ(VA_BITS) | TCR_FLAGS | TCR_IPS_40BIT | \
+ ldr x10, =TCR_TxSZ(VA_BITS) | TCR_FLAGS | \
TCR_ASID16 | TCR_TBI0 | (1 << 31)
+ /*
+ * Read the PARange bits from ID_AA64MMFR0_EL1 and set the IPS bits in
+ * TCR_EL1.
+ */
+ mrs x9, ID_AA64MMFR0_EL1
+ bfi x10, x9, #32, #3
#ifdef CONFIG_ARM64_64K_PAGES
orr x10, x10, TCR_TG0_64K
orr x10, x10, TCR_TG1_64K