[RFC PATCH 17/45] KVM: arm/arm64: vgic-new: Add PRIORITY registers handlers
From: andre.przywara@arm.com (Andre Przywara)
Date: 2016-03-25 02:04:40
Also in:
kvm, kvmarm
Subsystem:
kernel virtual machine (kvm), the rest · Maintainers:
Paolo Bonzini, Linus Torvalds
Signed-off-by: Andre Przywara <andre.przywara@arm.com> --- virt/kvm/arm/vgic/vgic_mmio.c | 46 ++++++++++++++++++++++++++++++++++++++++++- 1 file changed, 45 insertions(+), 1 deletion(-)
diff --git a/virt/kvm/arm/vgic/vgic_mmio.c b/virt/kvm/arm/vgic/vgic_mmio.c
index 8514f92..788e186 100644
--- a/virt/kvm/arm/vgic/vgic_mmio.c
+++ b/virt/kvm/arm/vgic/vgic_mmio.c@@ -289,6 +289,50 @@ static int vgic_mmio_write_cpending(struct kvm_vcpu *vcpu, return 0; } +static int vgic_mmio_read_priority(struct kvm_vcpu *vcpu, + struct kvm_io_device *this, + gpa_t addr, int len, void *val) +{ + struct vgic_io_device *iodev = container_of(this, + struct vgic_io_device, dev); + u32 intid = (addr - iodev->base_addr); + int i; + + if (iodev->redist_vcpu) + vcpu = iodev->redist_vcpu; + + for (i = 0; i < len; i++) { + struct vgic_irq *irq = vgic_get_irq(vcpu->kvm, vcpu, intid + i); + + ((u8 *)val)[i] = irq->priority; + } + + return 0; +} + +static int vgic_mmio_write_priority(struct kvm_vcpu *vcpu, + struct kvm_io_device *this, + gpa_t addr, int len, const void *val) +{ + struct vgic_io_device *iodev = container_of(this, + struct vgic_io_device, dev); + u32 intid = (addr - iodev->base_addr); + int i; + + if (iodev->redist_vcpu) + vcpu = iodev->redist_vcpu; + + for (i = 0; i < len; i++) { + struct vgic_irq *irq = vgic_get_irq(vcpu->kvm, vcpu, intid + i); + + spin_lock(&irq->irq_lock); + irq->priority = ((u8 *)val)[i]; + spin_unlock(&irq->irq_lock); + } + + return 0; +} + struct vgic_register_region vgic_v2_dist_registers[] = { REGISTER_DESC_WITH_LENGTH(GIC_DIST_CTRL, vgic_mmio_read_v2_misc, vgic_mmio_write_v2_misc, 12),
@@ -307,7 +351,7 @@ struct vgic_register_region vgic_v2_dist_registers[] = { REGISTER_DESC_WITH_BITS_PER_IRQ(GIC_DIST_ACTIVE_CLEAR, vgic_mmio_read_nyi, vgic_mmio_write_nyi, 1), REGISTER_DESC_WITH_BITS_PER_IRQ(GIC_DIST_PRI, - vgic_mmio_read_nyi, vgic_mmio_write_nyi, 8), + vgic_mmio_read_priority, vgic_mmio_write_priority, 8), REGISTER_DESC_WITH_BITS_PER_IRQ(GIC_DIST_TARGET, vgic_mmio_read_nyi, vgic_mmio_write_nyi, 8), REGISTER_DESC_WITH_BITS_PER_IRQ(GIC_DIST_CONFIG,
--
2.7.3