xiaomi-sm8450/android_kernel_xiaomi_sm8450
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

KVM: arm/arm64: Replace the single rdist region by a list

Browse Source 
At the moment KVM supports a single rdist region. We want to
support several separate rdist regions so let's introduce a list
of them. This patch currently only cares about a single
entry in this list as the functionality to register several redist
regions is not yet there. So this only translates the existing code
into something functionally similar using that new data struct.

The redistributor region handle is stored in the vgic_cpu structure
to allow later computation of the TYPER last bit.

Signed-off-by: Eric Auger <eric.auger@redhat.com>
Reviewed-by: Christoffer Dall <christoffer.dall@arm.com>
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
This commit is contained in:
Eric Auger
2018-05-22 09:55:08 +02:00
committed by Marc Zyngier
parent d6c77bd19c
commit dbd9733ab6
5 changed files with 79 additions and 26 deletions
Download Patch File Download Diff File Expand all files Collapse all files

13
virt/kvm/arm/vgic/vgic-kvm-device.c
View File

@@ -66,6 +66,7 @@ int kvm_vgic_addr(struct kvm *kvm, unsigned long type, u64 *addr, bool write)
int r = 0;
struct vgic_dist *vgic = &kvm->arch.vgic;
phys_addr_t *addr_ptr, alignment;
u64 undef_value = VGIC_ADDR_UNDEF;
mutex_lock(&kvm->lock);
switch (type) {
@@ -84,7 +85,9 @@ int kvm_vgic_addr(struct kvm *kvm, unsigned long type, u64 *addr, bool write)
addr_ptr = &vgic->vgic_dist_base;
alignment = SZ_64K;
break;
case KVM_VGIC_V3_ADDR_TYPE_REDIST:
case KVM_VGIC_V3_ADDR_TYPE_REDIST: {
struct vgic_redist_region *rdreg;
r = vgic_check_type(kvm, KVM_DEV_TYPE_ARM_VGIC_V3);
if (r)
break;
@@ -92,8 +95,14 @@ int kvm_vgic_addr(struct kvm *kvm, unsigned long type, u64 *addr, bool write)
r = vgic_v3_set_redist_base(kvm, *addr);
goto out;
}
addr_ptr = &vgic->vgic_redist_base;
rdreg = list_first_entry(&vgic->rd_regions,
struct vgic_redist_region, list);
if (!rdreg)
addr_ptr = &undef_value;
else
addr_ptr = &rdreg->base;
break;
}
default:
r = -ENODEV;
}