diff options
| author | Vladimir Murzin <vladimir.murzin@arm.com> | 2015-11-16 11:28:18 +0000 |
|---|---|---|
| committer | Alex Shi <alex.shi@linaro.org> | 2016-11-09 22:20:21 +0800 |
| commit | 1a1549bd76b83aef16938f575af8f5a1ecf3ed1f (patch) | |
| tree | 3b919ef4f5aaa11e2f9c036c6312e0be6fa1561a /arch/arm64/kvm | |
| parent | 516f3f777e5fb0710f1626c79e3dacca751b8c30 (diff) | |
arm64: KVM: Add support for 16-bit VMID
The ARMv8.1 architecture extension allows to choose between 8-bit and
16-bit of VMID, so use this capability for KVM.
Reviewed-by: Christoffer Dall <christoffer.dall@linaro.org>
Signed-off-by: Vladimir Murzin <vladimir.murzin@arm.com>
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
(cherry picked from commit 20475f784d29991b3b843c80c38a36f2ebb35ac4)
Signed-off-by: Alex Shi <alex.shi@linaro.org>
Conflicts:
camptiable with LTS 849e28efb04c4c:arm64: KVM: Configure TCR_EL2.PS at runtime
in arch/arm64/kvm/hyp-init.S
Diffstat (limited to 'arch/arm64/kvm')
| -rw-r--r-- | arch/arm64/kvm/hyp-init.S | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/arch/arm64/kvm/hyp-init.S b/arch/arm64/kvm/hyp-init.S index 84c338f017b2..d073b5a216f7 100644 --- a/arch/arm64/kvm/hyp-init.S +++ b/arch/arm64/kvm/hyp-init.S @@ -96,6 +96,14 @@ __do_hyp_init: ldr x4, =VTCR_EL2_FLAGS bfi x4, x5, #16, #3 + /* + * Read the VMIDBits bits from ID_AA64MMFR1_EL1 and set the VS bit in + * VTCR_EL2. + */ + mrs x5, ID_AA64MMFR1_EL1 + ubfx x5, x5, #5, #1 + lsl x5, x5, #VTCR_EL2_VS + orr x4, x4, x5 msr vtcr_el2, x4 |