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hw/intc/arm_gicv3_kvm: Get prepared to handle multiple redist regions 

Let's check if KVM_VGIC_V3_ADDR_TYPE_REDIST_REGION is supported.
If not, we check the number of redist region is equal to 1 and use the
legacy KVM_VGIC_V3_ADDR_TYPE_REDIST attribute. Otherwise we use
the new attribute and allow to register multiple regions to the
KVM device.

Signed-off-by: Eric Auger <eric.auger@redhat.com>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Andrew Jones <drjones@redhat.com>
Message-id: 1529072910-16156-5-git-send-email-eric.auger@redhat.com
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
This commit is contained in:
Eric Auger 2018-06-22 13:28:36 +01:00 committed by Peter Maydell
parent 1e575b6664
commit 80d6733389
1 changed files with 34 additions and 3 deletions
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37
hw/intc/arm_gicv3_kvm.c
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@ -767,6 +767,7 @@ static void kvm_arm_gicv3_realize(DeviceState *dev, Error **errp)
{
GICv3State *s = KVM_ARM_GICV3(dev);
KVMARMGICv3Class *kgc = KVM_ARM_GICV3_GET_CLASS(s);
bool multiple_redist_region_allowed;
Error *local_err = NULL;
int i;
@ -803,6 +804,18 @@ static void kvm_arm_gicv3_realize(DeviceState *dev, Error **errp)
return;
}
multiple_redist_region_allowed =
kvm_device_check_attr(s->dev_fd, KVM_DEV_ARM_VGIC_GRP_ADDR,
KVM_VGIC_V3_ADDR_TYPE_REDIST_REGION);
if (!multiple_redist_region_allowed && s->nb_redist_regions > 1) {
error_setg(errp, "Multiple VGICv3 redistributor regions are not "
"supported by this host kernel");
error_append_hint(errp, "A maximum of %d VCPUs can be used",
s->redist_region_count[0]);
return;
}
kvm_device_access(s->dev_fd, KVM_DEV_ARM_VGIC_GRP_NR_IRQS,
0, &s->num_irq, true, &error_abort);
@ -812,9 +825,27 @@ static void kvm_arm_gicv3_realize(DeviceState *dev, Error **errp)
kvm_arm_register_device(&s->iomem_dist, -1, KVM_DEV_ARM_VGIC_GRP_ADDR,
KVM_VGIC_V3_ADDR_TYPE_DIST, s->dev_fd, 0);
kvm_arm_register_device(&s->iomem_redist[0], -1,
KVM_DEV_ARM_VGIC_GRP_ADDR,
KVM_VGIC_V3_ADDR_TYPE_REDIST, s->dev_fd, 0);
if (!multiple_redist_region_allowed) {
kvm_arm_register_device(&s->iomem_redist[0], -1,
KVM_DEV_ARM_VGIC_GRP_ADDR,
KVM_VGIC_V3_ADDR_TYPE_REDIST, s->dev_fd, 0);
} else {
/* we register regions in reverse order as "devices" are inserted at
* the head of a QSLIST and the list is then popped from the head
* onwards by kvm_arm_machine_init_done()
*/
for (i = s->nb_redist_regions - 1; i >= 0; i--) {
/* Address mask made of the rdist region index and count */
uint64_t addr_ormask =
i | ((uint64_t)s->redist_region_count[i] << 52);
kvm_arm_register_device(&s->iomem_redist[i], -1,
KVM_DEV_ARM_VGIC_GRP_ADDR,
KVM_VGIC_V3_ADDR_TYPE_REDIST_REGION,
s->dev_fd, addr_ormask);
}
}
if (kvm_has_gsi_routing()) {
/* set up irq routing */