summaryrefslogtreecommitdiffstats
path: root/arch/arm64/kvm/hyp-init.S
diff options
context:
space:
mode:
authorRadha Mohan Chintakuntla <rchintakuntla@cavium.com>2014-03-07 08:49:25 +0000
committerCatalin Marinas <catalin.marinas@arm.com>2014-03-13 11:22:36 +0000
commit87366d8cf7b3f6dc34633938aa8766e5a390ce33 (patch)
tree9af5603c6cf5627207b0b78a44777bdfde6a1f87 /arch/arm64/kvm/hyp-init.S
parent71fdb6bf61bf0692f004f9daf5650392c0cfe300 (diff)
downloadlinux-87366d8cf7b3f6dc34633938aa8766e5a390ce33.tar.bz2
arm64: Add boot time configuration of Intermediate Physical Address size
ARMv8 supports a range of physical address bit sizes. The PARange bits from ID_AA64MMFR0_EL1 register are read during boot-time and the intermediate physical address size bits are written in the translation control registers (TCR_EL1 and VTCR_EL2). There is no change in the VA bits and levels of translation. Signed-off-by: Radha Mohan Chintakuntla <rchintakuntla@cavium.com> Reviewed-by: Will Deacon <Will.deacon@arm.com> Acked-by: Marc Zyngier <marc.zyngier@arm.com> Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Diffstat (limited to 'arch/arm64/kvm/hyp-init.S')
-rw-r--r--arch/arm64/kvm/hyp-init.S6
1 files changed, 6 insertions, 0 deletions
diff --git a/arch/arm64/kvm/hyp-init.S b/arch/arm64/kvm/hyp-init.S
index 2b0244d65c16..d968796f4b2d 100644
--- a/arch/arm64/kvm/hyp-init.S
+++ b/arch/arm64/kvm/hyp-init.S
@@ -68,6 +68,12 @@ __do_hyp_init:
msr tcr_el2, x4
ldr x4, =VTCR_EL2_FLAGS
+ /*
+ * Read the PARange bits from ID_AA64MMFR0_EL1 and set the PS bits in
+ * VTCR_EL2.
+ */
+ mrs x5, ID_AA64MMFR0_EL1
+ bfi x4, x5, #16, #3
msr vtcr_el2, x4
mrs x4, mair_el1