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authorSteven Price <steven.price@arm.com>2019-10-21 16:28:20 +0100
committerMarc Zyngier <maz@kernel.org>2019-10-21 19:20:29 +0100
commit58772e9a3db72d032eeb12bc011bc5184a3925f4 (patch)
treeb361c22a662a8134aa13c4351291aa891cdac647 /arch/arm64/kvm/guest.c
parent8538cb22bbce5a988671b68baf0b0f9e86ca1e87 (diff)
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KVM: arm64: Provide VCPU attributes for stolen time
Allow user space to inform the KVM host where in the physical memory map the paravirtualized time structures should be located. User space can set an attribute on the VCPU providing the IPA base address of the stolen time structure for that VCPU. This must be repeated for every VCPU in the VM. The address is given in terms of the physical address visible to the guest and must be 64 byte aligned. The guest will discover the address via a hypercall. Signed-off-by: Steven Price <steven.price@arm.com> Signed-off-by: Marc Zyngier <maz@kernel.org>
Diffstat (limited to 'arch/arm64/kvm/guest.c')
-rw-r--r--arch/arm64/kvm/guest.c9
1 files changed, 9 insertions, 0 deletions
diff --git a/arch/arm64/kvm/guest.c b/arch/arm64/kvm/guest.c
index dfd626447482..d3ac9d2fd405 100644
--- a/arch/arm64/kvm/guest.c
+++ b/arch/arm64/kvm/guest.c
@@ -858,6 +858,9 @@ int kvm_arm_vcpu_arch_set_attr(struct kvm_vcpu *vcpu,
case KVM_ARM_VCPU_TIMER_CTRL:
ret = kvm_arm_timer_set_attr(vcpu, attr);
break;
+ case KVM_ARM_VCPU_PVTIME_CTRL:
+ ret = kvm_arm_pvtime_set_attr(vcpu, attr);
+ break;
default:
ret = -ENXIO;
break;
@@ -878,6 +881,9 @@ int kvm_arm_vcpu_arch_get_attr(struct kvm_vcpu *vcpu,
case KVM_ARM_VCPU_TIMER_CTRL:
ret = kvm_arm_timer_get_attr(vcpu, attr);
break;
+ case KVM_ARM_VCPU_PVTIME_CTRL:
+ ret = kvm_arm_pvtime_get_attr(vcpu, attr);
+ break;
default:
ret = -ENXIO;
break;
@@ -898,6 +904,9 @@ int kvm_arm_vcpu_arch_has_attr(struct kvm_vcpu *vcpu,
case KVM_ARM_VCPU_TIMER_CTRL:
ret = kvm_arm_timer_has_attr(vcpu, attr);
break;
+ case KVM_ARM_VCPU_PVTIME_CTRL:
+ ret = kvm_arm_pvtime_has_attr(vcpu, attr);
+ break;
default:
ret = -ENXIO;
break;