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| author | Marc Zyngier <maz@kernel.org> | 2022-07-05 15:34:33 +0200 |
|---|---|---|
| committer | Marc Zyngier <maz@kernel.org> | 2022-07-17 12:55:33 +0200 |
| commit | 9f968c9266aa30b0e81be0c6a560e45b93bed3dc (patch) | |
| tree | 9b839bae46e7b61ff0ba2607f2c288060fb7fb20 /arch/arm64/kvm/vgic | |
| parent | KVM: arm64: vgic: Use {get,put}_user() instead of copy_{from.to}_user (diff) | |
| download | linux-9f968c9266aa30b0e81be0c6a560e45b93bed3dc.tar.xz linux-9f968c9266aa30b0e81be0c6a560e45b93bed3dc.zip | |
KVM: arm64: vgic-v2: Add helper for legacy dist/cpuif base address setting
We carry a legacy interface to set the base addresses for GICv2.
As this is currently plumbed into the same handling code as
the modern interface, it limits the evolution we can make there.
Add a helper dedicated to this handling, with a view of maybe
removing this in the future.
Signed-off-by: Marc Zyngier <maz@kernel.org>
Diffstat (limited to 'arch/arm64/kvm/vgic')
| -rw-r--r-- | arch/arm64/kvm/vgic/vgic-kvm-device.c | 32 |
1 files changed, 32 insertions, 0 deletions
diff --git a/arch/arm64/kvm/vgic/vgic-kvm-device.c b/arch/arm64/kvm/vgic/vgic-kvm-device.c index c17e5502c0b3..04175fd55da6 100644 --- a/arch/arm64/kvm/vgic/vgic-kvm-device.c +++ b/arch/arm64/kvm/vgic/vgic-kvm-device.c @@ -41,6 +41,38 @@ static int vgic_check_type(struct kvm *kvm, int type_needed) return 0; } +int kvm_set_legacy_vgic_v2_addr(struct kvm *kvm, struct kvm_arm_device_addr *dev_addr) +{ + struct vgic_dist *vgic = &kvm->arch.vgic; + int r; + + mutex_lock(&kvm->lock); + switch (FIELD_GET(KVM_ARM_DEVICE_TYPE_MASK, dev_addr->id)) { + case KVM_VGIC_V2_ADDR_TYPE_DIST: + r = vgic_check_type(kvm, KVM_DEV_TYPE_ARM_VGIC_V2); + if (!r) + r = vgic_check_iorange(kvm, vgic->vgic_dist_base, dev_addr->addr, + SZ_4K, KVM_VGIC_V2_DIST_SIZE); + if (!r) + vgic->vgic_dist_base = dev_addr->addr; + break; + case KVM_VGIC_V2_ADDR_TYPE_CPU: + r = vgic_check_type(kvm, KVM_DEV_TYPE_ARM_VGIC_V2); + if (!r) + r = vgic_check_iorange(kvm, vgic->vgic_cpu_base, dev_addr->addr, + SZ_4K, KVM_VGIC_V2_CPU_SIZE); + if (!r) + vgic->vgic_cpu_base = dev_addr->addr; + break; + default: + r = -ENODEV; + } + + mutex_unlock(&kvm->lock); + + return r; +} + /** * kvm_vgic_addr - set or get vgic VM base addresses * @kvm: pointer to the vm struct |