[RFC PATCH 22/45] KVM: arm/arm64: vgic-new: Add SGIPENDR register handlers
From: andre.przywara@arm.com (Andre Przywara)
Date: 2016-03-25 02:04:45
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 | 79 ++++++++++++++++++++++++++++++++----------- 1 file changed, 59 insertions(+), 20 deletions(-)
diff --git a/virt/kvm/arm/vgic/vgic_mmio.c b/virt/kvm/arm/vgic/vgic_mmio.c
index a49726f..2ab8961 100644
--- a/virt/kvm/arm/vgic/vgic_mmio.c
+++ b/virt/kvm/arm/vgic/vgic_mmio.c@@ -64,24 +64,6 @@ int vgic_mmio_write_wi(struct kvm_vcpu *vcpu, struct kvm_io_device *this, return 0; } -static int vgic_mmio_read_nyi(struct kvm_vcpu *vcpu, - struct kvm_io_device *this, - gpa_t addr, int len, void *val) -{ - pr_warn("KVM: handling unimplemented VGIC MMIO read: VCPU %d, address: 0x%llx\n", - vcpu->vcpu_id, (unsigned long long)addr); - return 0; -} - -static int vgic_mmio_write_nyi(struct kvm_vcpu *vcpu, - struct kvm_io_device *this, - gpa_t addr, int len, const void *val) -{ - pr_warn("KVM: handling unimplemented VGIC MMIO write: VCPU %d, address: 0x%llx\n", - vcpu->vcpu_id, (unsigned long long)addr); - return 0; -} - static int vgic_mmio_read_v2_misc(struct kvm_vcpu *vcpu, struct kvm_io_device *this, gpa_t addr, int len, void *val)
@@ -556,6 +538,63 @@ static int vgic_mmio_write_sgir(struct kvm_vcpu *source_vcpu, return 0; } +static int vgic_mmio_read_sgipend(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; + + for (i = 0; i < len; i++) { + struct vgic_irq *irq = vgic_get_irq(vcpu->kvm, vcpu, intid + i); + + spin_lock(&irq->irq_lock); + ((u8 *)val)[i] = irq->source; + spin_unlock(&irq->irq_lock); + } + return 0; +} + +static int vgic_mmio_write_sgipendc(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; + + for (i = 0; i < len; i++) { + struct vgic_irq *irq = vgic_get_irq(vcpu->kvm, vcpu, intid + i); + + spin_lock(&irq->irq_lock); + irq->source &= ~((u8 *)val)[i]; + spin_unlock(&irq->irq_lock); + } + return 0; +} + +static int vgic_mmio_write_sgipends(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; + + for (i = 0; i < len; i++) { + struct vgic_irq *irq = vgic_get_irq(vcpu->kvm, vcpu, intid + i); + + spin_lock(&irq->irq_lock); + irq->source |= ((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),
@@ -582,9 +621,9 @@ struct vgic_register_region vgic_v2_dist_registers[] = { REGISTER_DESC_WITH_LENGTH(GIC_DIST_SOFTINT, vgic_mmio_read_raz, vgic_mmio_write_sgir, 4), REGISTER_DESC_WITH_LENGTH(GIC_DIST_SGI_PENDING_CLEAR, - vgic_mmio_read_nyi, vgic_mmio_write_nyi, 16), + vgic_mmio_read_sgipend, vgic_mmio_write_sgipendc, 16), REGISTER_DESC_WITH_LENGTH(GIC_DIST_SGI_PENDING_SET, - vgic_mmio_read_nyi, vgic_mmio_write_nyi, 16), + vgic_mmio_read_sgipend, vgic_mmio_write_sgipends, 16), }; /*
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2.7.3