virtio-iommu: Add an option to define the input range width
aw-bits is a new option that allows to set the bit width of the input address range. This value will be used as a default for the device config input_range.end. By default it is set to 64 bits which is the current value. Signed-off-by: Eric Auger <eric.auger@redhat.com> Reviewed-by: Zhenzhong Duan <zhenzhong.duan@intel.com> Reviewed-by: Cédric Le Goater <clg@redhat.com> Message-Id: <20240307134445.92296-7-eric.auger@redhat.com> Reviewed-by: Michael S. Tsirkin <mst@redhat.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
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@ -1314,7 +1314,12 @@ static void virtio_iommu_device_realize(DeviceState *dev, Error **errp)
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* in vfio realize
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*/
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s->config.bypass = s->boot_bypass;
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s->config.input_range.end = UINT64_MAX;
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if (s->aw_bits < 32 || s->aw_bits > 64) {
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error_setg(errp, "aw-bits must be within [32,64]");
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return;
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}
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s->config.input_range.end =
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s->aw_bits == 64 ? UINT64_MAX : BIT_ULL(s->aw_bits) - 1;
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switch (s->granule_mode) {
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case GRANULE_MODE_4K:
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@ -1544,6 +1549,7 @@ static Property virtio_iommu_properties[] = {
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DEFINE_PROP_BOOL("boot-bypass", VirtIOIOMMU, boot_bypass, true),
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DEFINE_PROP_GRANULE_MODE("granule", VirtIOIOMMU, granule_mode,
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GRANULE_MODE_HOST),
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DEFINE_PROP_UINT8("aw-bits", VirtIOIOMMU, aw_bits, 64),
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DEFINE_PROP_END_OF_LIST(),
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};
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@ -68,6 +68,7 @@ struct VirtIOIOMMU {
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Notifier machine_done;
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bool granule_frozen;
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GranuleMode granule_mode;
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uint8_t aw_bits;
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};
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#endif
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