diff options
| author | Suzuki K Poulose <suzuki.poulose@arm.com> | 2018-09-26 17:32:48 +0100 |
|---|---|---|
| committer | Marc Zyngier <marc.zyngier@arm.com> | 2018-10-01 13:50:31 +0100 |
| commit | 7e8130456e067f49693fdcc25b5ba242a9c5568b (patch) | |
| tree | 7dc763c8deee5e752f3bc9be0f993e1c49138abd /arch/arm64/kvm | |
| parent | 595583306434caafac4a71102dca5a8d32d1a769 (diff) | |
kvm: arm64: Configure VTCR_EL2.SL0 per VM
VTCR_EL2 holds the following key stage2 translation table
parameters:
SL0 - Entry level in the page table lookup.
T0SZ - Denotes the size of the memory addressed by the table.
We have been using fixed values for the SL0 depending on the
page size as we have a fixed IPA size. But since we are about
to make it dynamic, we need to calculate the SL0 at runtime
per VM. This patch adds a helper to compute the value of SL0
for a VM based on the IPA size.
Cc: Marc Zyngier <marc.zyngier@arm.com>
Cc: Christoffer Dall <cdall@kernel.org>
Reviewed-by: Eric Auger <eric.auger@redhat.com>
Signed-off-by: Suzuki K Poulose <suzuki.poulose@arm.com>
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
Diffstat (limited to 'arch/arm64/kvm')
| -rw-r--r-- | arch/arm64/kvm/reset.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/arch/arm64/kvm/reset.c b/arch/arm64/kvm/reset.c index 616120c4176b..1ced1e37374e 100644 --- a/arch/arm64/kvm/reset.c +++ b/arch/arm64/kvm/reset.c @@ -160,6 +160,7 @@ int kvm_arm_config_vm(struct kvm *kvm, unsigned long type) if (phys_shift > KVM_PHYS_SHIFT) phys_shift = KVM_PHYS_SHIFT; vtcr |= VTCR_EL2_T0SZ(phys_shift); + vtcr |= VTCR_EL2_LVLS_TO_SL0(kvm_stage2_levels(kvm)); /* * Enable the Hardware Access Flag management, unconditionally |