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KVM: arm/arm64: Slightly rework kvm_vgic_addr 

As we are about to handle setting the address for the redistributor base
region separately from some of the other base addresses, let's rework
this function to leave a little more room for being flexible in what
each type of base address does.

Signed-off-by: Christoffer Dall <cdall@linaro.org>
Reviewed-by: Eric Auger <eric.auger@redhat.com>
This commit is contained in:
Christoffer Dall 2017-05-08 12:28:19 +02:00
parent 9a746d75c0
commit 72030536eb
1 changed files with 13 additions and 9 deletions
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22
virt/kvm/arm/vgic/vgic-kvm-device.c
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@ -37,6 +37,14 @@ int vgic_check_ioaddr(struct kvm *kvm, phys_addr_t *ioaddr,
return 0;
}
static int vgic_check_type(struct kvm *kvm, int type_needed)
{
if (kvm->arch.vgic.vgic_model != type_needed)
return -ENODEV;
else
return 0;
}
/**
* kvm_vgic_addr - set or get vgic VM base addresses
* @kvm: pointer to the vm struct
@ -57,40 +65,36 @@ int kvm_vgic_addr(struct kvm *kvm, unsigned long type, u64 *addr, bool write)
{
int r = 0;
struct vgic_dist *vgic = &kvm->arch.vgic;
int type_needed;
phys_addr_t *addr_ptr, alignment;
mutex_lock(&kvm->lock);
switch (type) {
case KVM_VGIC_V2_ADDR_TYPE_DIST:
type_needed = KVM_DEV_TYPE_ARM_VGIC_V2;
r = vgic_check_type(kvm, KVM_DEV_TYPE_ARM_VGIC_V2);
addr_ptr = &vgic->vgic_dist_base;
alignment = SZ_4K;
break;
case KVM_VGIC_V2_ADDR_TYPE_CPU:
type_needed = KVM_DEV_TYPE_ARM_VGIC_V2;
r = vgic_check_type(kvm, KVM_DEV_TYPE_ARM_VGIC_V2);
addr_ptr = &vgic->vgic_cpu_base;
alignment = SZ_4K;
break;
case KVM_VGIC_V3_ADDR_TYPE_DIST:
type_needed = KVM_DEV_TYPE_ARM_VGIC_V3;
r = vgic_check_type(kvm, KVM_DEV_TYPE_ARM_VGIC_V3);
addr_ptr = &vgic->vgic_dist_base;
alignment = SZ_64K;
break;
case KVM_VGIC_V3_ADDR_TYPE_REDIST:
type_needed = KVM_DEV_TYPE_ARM_VGIC_V3;
r = vgic_check_type(kvm, KVM_DEV_TYPE_ARM_VGIC_V3);
addr_ptr = &vgic->vgic_redist_base;
alignment = SZ_64K;
break;
default:
r = -ENODEV;
goto out;
}
if (vgic->vgic_model != type_needed) {
r = -ENODEV;
if (r)
goto out;
}
if (write) {
r = vgic_check_ioaddr(kvm, addr_ptr, *addr, alignment);