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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>
master
Eric Auger 2024-03-07 14:43:07 +01:00 committed by Michael S. Tsirkin
parent fdda908f94
commit 01e7e4921c
2 changed files with 8 additions and 1 deletions
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8
hw/virtio/virtio-iommu.c
View File

@ -1314,7 +1314,12 @@ static void virtio_iommu_device_realize(DeviceState *dev, Error **errp)
* in vfio realize
*/
s->config.bypass = s->boot_bypass;
s->config.input_range.end = UINT64_MAX;
if (s->aw_bits < 32 || s->aw_bits > 64) {
error_setg(errp, "aw-bits must be within [32,64]");
return;
}
s->config.input_range.end =
s->aw_bits == 64 ? UINT64_MAX : BIT_ULL(s->aw_bits) - 1;
switch (s->granule_mode) {
case GRANULE_MODE_4K:
@ -1544,6 +1549,7 @@ static Property virtio_iommu_properties[] = {
DEFINE_PROP_BOOL("boot-bypass", VirtIOIOMMU, boot_bypass, true),
DEFINE_PROP_GRANULE_MODE("granule", VirtIOIOMMU, granule_mode,
GRANULE_MODE_HOST),
DEFINE_PROP_UINT8("aw-bits", VirtIOIOMMU, aw_bits, 64),
DEFINE_PROP_END_OF_LIST(),
};

1
include/hw/virtio/virtio-iommu.h
View File

@ -68,6 +68,7 @@ struct VirtIOIOMMU {
Notifier machine_done;
bool granule_frozen;
GranuleMode granule_mode;
uint8_t aw_bits;
};
#endif