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hw/arm/virt: Set msi-gpa property

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Set the MSI doorbell GPA property for accelerated SMMUv3 devices for use
by KVM MSI setup. Also, since any meaningful use of vfio-pci devices with
an accelerated SMMUv3 requires both KVM and a kernel irqchip, ensure
those are specified when accel=on is selected.

Reviewed-by: Nicolin Chen <nicolinc@nvidia.com>
Tested-by: Eric Auger <eric.auger@redhat.com>
Tested-by: Zhangfei Gao <zhangfei.gao@linaro.org>
Reviewed-by: Jonathan Cameron <jonathan.cameron@huawei.com>
Signed-off-by: Shameer Kolothum <skolothumtho@nvidia.com>
Message-id: 20260126104342.253965-19-skolothumtho@nvidia.com
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
This commit is contained in:
Shameer Kolothum
2026-01-29 13:32:05 +00:00
committed by Peter Maydell
parent 3558c85392
commit 5ec2700dcb
1 changed files with 20 additions and 0 deletions
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20
hw/arm/virt.c
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@@ -3061,6 +3061,26 @@ static void virt_machine_device_pre_plug_cb(HotplugHandler *hotplug_dev,
object_property_set_link(OBJECT(dev), "secure-memory",
OBJECT(vms->secure_sysmem), NULL);
}
if (object_property_find(OBJECT(dev), "accel") &&
object_property_get_bool(OBJECT(dev), "accel", &error_abort)) {
hwaddr db_start = 0;
if (!kvm_enabled() || !kvm_irqchip_in_kernel()) {
error_setg(errp, "SMMUv3 accel=on requires KVM with "
"kernel-irqchip=on support");
return;
}
if (vms->msi_controller == VIRT_MSI_CTRL_ITS) {
/* GITS_TRANSLATER page + offset */
db_start = base_memmap[VIRT_GIC_ITS].base + 0x10000 + 0x40;
} else if (vms->msi_controller == VIRT_MSI_CTRL_GICV2M) {
/* MSI_SETSPI_NS page + offset */
db_start = base_memmap[VIRT_GIC_V2M].base + 0x40;
}
object_property_set_uint(OBJECT(dev), "msi-gpa", db_start,
&error_abort);
}
}
}