Commit e5c30294 authored by Eric Auger's avatar Eric Auger Committed by Christoffer Dall
Browse files

KVM: arm/arm64: vgic-new: vgic_kvm_device: KVM_DEV_ARM_VGIC_GRP_ADDR 



This patch implements the KVM_DEV_ARM_VGIC_GRP_ADDR group which
enables to set the base address of GIC regions as seen by the guest.

Signed-off-by: default avatarEric Auger <eric.auger@linaro.org>
Signed-off-by: default avatarAndre Przywara <andre.przywara@arm.com>
Reviewed-by: default avatarChristoffer Dall <christoffer.dall@linaro.org>
parent e2c1f9ab

virt/kvm/arm/vgic/vgic-kvm-device.c

+38 −0
Original line number Diff line number Diff line
@@ -112,6 +112,17 @@ static int vgic_set_common_attr(struct kvm_device *dev, 
	int r;



	switch (attr->group) {

	case KVM_DEV_ARM_VGIC_GRP_ADDR: {

		u64 __user *uaddr = (u64 __user *)(long)attr->addr;

		u64 addr;

		unsigned long type = (unsigned long)attr->attr;



		if (copy_from_user(&addr, uaddr, sizeof(addr)))

			return -EFAULT;



		r = kvm_vgic_addr(dev->kvm, type, &addr, true);

		return (r == -ENODEV) ? -ENXIO : r;

	}

	case KVM_DEV_ARM_VGIC_GRP_NR_IRQS: {

		u32 __user *uaddr = (u32 __user *)(long)attr->addr;

		u32 val;
@@ -164,6 +175,19 @@ static int vgic_get_common_attr(struct kvm_device *dev, 
	int r = -ENXIO;



	switch (attr->group) {

	case KVM_DEV_ARM_VGIC_GRP_ADDR: {

		u64 __user *uaddr = (u64 __user *)(long)attr->addr;

		u64 addr;

		unsigned long type = (unsigned long)attr->attr;



		r = kvm_vgic_addr(dev->kvm, type, &addr, false);

		if (r)

			return (r == -ENODEV) ? -ENXIO : r;



		if (copy_to_user(uaddr, &addr, sizeof(addr)))

			return -EFAULT;

		break;

	}

	case KVM_DEV_ARM_VGIC_GRP_NR_IRQS: {

		u32 __user *uaddr = (u32 __user *)(long)attr->addr;
@@ -227,6 +251,13 @@ static int vgic_v2_has_attr(struct kvm_device *dev, 
			    struct kvm_device_attr *attr)

{

	switch (attr->group) {

	case KVM_DEV_ARM_VGIC_GRP_ADDR:

		switch (attr->attr) {

		case KVM_VGIC_V2_ADDR_TYPE_DIST:

		case KVM_VGIC_V2_ADDR_TYPE_CPU:

			return 0;

		}

		break;

	case KVM_DEV_ARM_VGIC_GRP_NR_IRQS:

		return 0;

	case KVM_DEV_ARM_VGIC_GRP_CTRL:
@@ -267,6 +298,13 @@ static int vgic_v3_has_attr(struct kvm_device *dev, 
			    struct kvm_device_attr *attr)

{

	switch (attr->group) {

	case KVM_DEV_ARM_VGIC_GRP_ADDR:

		switch (attr->attr) {

		case KVM_VGIC_V3_ADDR_TYPE_DIST:

		case KVM_VGIC_V3_ADDR_TYPE_REDIST:

			return 0;

		}

		break;

	case KVM_DEV_ARM_VGIC_GRP_NR_IRQS:

		return 0;

	case KVM_DEV_ARM_VGIC_GRP_CTRL:

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