As the enable register handlers are shared between the v2 and v3 emulation, their implementation goes into vgic-mmio.c, to be easily referenced from the v3 emulation as well later. Signed-off-by: Andre Przywara <andre.przywara@xxxxxxx> --- Changelog RFC..v1: - use lower bits of address to determine IRQ number - remove TODO, confirmed to be fine Changelog v1 .. v2: - adapt to new MMIO framework virt/kvm/arm/vgic/vgic-mmio-v2.c | 4 +-- virt/kvm/arm/vgic/vgic-mmio.c | 56 ++++++++++++++++++++++++++++++++++++++++ virt/kvm/arm/vgic/vgic-mmio.h | 11 ++++++++ 3 files changed, 69 insertions(+), 2 deletions(-) diff --git a/virt/kvm/arm/vgic/vgic-mmio-v2.c b/virt/kvm/arm/vgic/vgic-mmio-v2.c index 69e96f7..448d1da 100644 --- a/virt/kvm/arm/vgic/vgic-mmio-v2.c +++ b/virt/kvm/arm/vgic/vgic-mmio-v2.c @@ -72,9 +72,9 @@ static const struct vgic_register_region vgic_v2_dist_registers[] = { REGISTER_DESC_WITH_BITS_PER_IRQ(GIC_DIST_IGROUP, vgic_mmio_read_rao, vgic_mmio_write_wi, 1), REGISTER_DESC_WITH_BITS_PER_IRQ(GIC_DIST_ENABLE_SET, - vgic_mmio_read_raz, vgic_mmio_write_wi, 1), + vgic_mmio_read_enable, vgic_mmio_write_senable, 1), REGISTER_DESC_WITH_BITS_PER_IRQ(GIC_DIST_ENABLE_CLEAR, - vgic_mmio_read_raz, vgic_mmio_write_wi, 1), + vgic_mmio_read_enable, vgic_mmio_write_cenable, 1), REGISTER_DESC_WITH_BITS_PER_IRQ(GIC_DIST_PENDING_SET, vgic_mmio_read_raz, vgic_mmio_write_wi, 1), REGISTER_DESC_WITH_BITS_PER_IRQ(GIC_DIST_PENDING_CLEAR, diff --git a/virt/kvm/arm/vgic/vgic-mmio.c b/virt/kvm/arm/vgic/vgic-mmio.c index 41cf4f4..077ae86 100644 --- a/virt/kvm/arm/vgic/vgic-mmio.c +++ b/virt/kvm/arm/vgic/vgic-mmio.c @@ -46,6 +46,62 @@ void vgic_mmio_write_wi(struct kvm_vcpu *vcpu, gpa_t addr, /* Ignore */ } +/* + * Read accesses to both GICD_ICENABLER and GICD_ISENABLER return the value + * of the enabled bit, so there is only one function for both here. + */ +unsigned long vgic_mmio_read_enable(struct kvm_vcpu *vcpu, + gpa_t addr, unsigned int len) +{ + u32 intid = (addr & 0x7f) * 8; + u32 value = 0; + int i; + + /* Loop over all IRQs affected by this read */ + for (i = 0; i < len * 8; i++) { + struct vgic_irq *irq = vgic_get_irq(vcpu->kvm, vcpu, intid + i); + + if (irq->enabled) + value |= (1U << i); + } + + return extract_bytes(value, addr & 3, len); +} + +void vgic_mmio_write_senable(struct kvm_vcpu *vcpu, + gpa_t addr, unsigned int len, + unsigned long val) +{ + u32 intid = (addr & 0x7f) * 8; + int i; + + for_each_set_bit(i, &val, len * 8) { + struct vgic_irq *irq = vgic_get_irq(vcpu->kvm, vcpu, intid + i); + + spin_lock(&irq->irq_lock); + irq->enabled = true; + vgic_queue_irq_unlock(vcpu->kvm, irq); + } +} + +void vgic_mmio_write_cenable(struct kvm_vcpu *vcpu, + gpa_t addr, unsigned int len, + unsigned long val) +{ + u32 intid = (addr & 0x7f) * 8; + int i; + + for_each_set_bit(i, &val, len * 8) { + struct vgic_irq *irq = vgic_get_irq(vcpu->kvm, vcpu, intid + i); + + spin_lock(&irq->irq_lock); + + irq->enabled = false; + + spin_unlock(&irq->irq_lock); + } +} + static int match_region(const void *key, const void *elt) { const unsigned int offset = (unsigned long)key; diff --git a/virt/kvm/arm/vgic/vgic-mmio.h b/virt/kvm/arm/vgic/vgic-mmio.h index 4f4dd2b..188909a 100644 --- a/virt/kvm/arm/vgic/vgic-mmio.h +++ b/virt/kvm/arm/vgic/vgic-mmio.h @@ -74,6 +74,17 @@ unsigned long vgic_mmio_read_rao(struct kvm_vcpu *vcpu, void vgic_mmio_write_wi(struct kvm_vcpu *vcpu, gpa_t addr, unsigned int len, unsigned long val); +unsigned long vgic_mmio_read_enable(struct kvm_vcpu *vcpu, + gpa_t addr, unsigned int len); + +void vgic_mmio_write_senable(struct kvm_vcpu *vcpu, + gpa_t addr, unsigned int len, + unsigned long val); + +void vgic_mmio_write_cenable(struct kvm_vcpu *vcpu, + gpa_t addr, unsigned int len, + unsigned long val); + unsigned int vgic_v2_init_dist_iodev(struct vgic_io_device *dev); #endif -- 2.7.3 -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html