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448179e33e
Currently the virtio-iommu device must be programmed before it allows DMA from any PCI device. This can make the VM entirely unusable when a virtio-iommu driver isn't present, for example in a bootloader that loads the OS from storage. Similarly to the other vIOMMU implementations, default to DMA bypassing the IOMMU during boot. Add a "boot-bypass" property, defaulting to true, that lets users change this behavior. Replace the VIRTIO_IOMMU_F_BYPASS feature, which didn't support bypass before feature negotiation, with VIRTIO_IOMMU_F_BYPASS_CONFIG. We add the bypass field to the migration stream without introducing subsections, based on the assumption that this virtio-iommu device isn't being used in production enough to require cross-version migration at the moment (all previous version required workarounds since they didn't support ACPI and boot-bypass). Reviewed-by: Eric Auger <eric.auger@redhat.com> Signed-off-by: Jean-Philippe Brucker <jean-philippe@linaro.org> Message-Id: <20220214124356.872985-3-jean-philippe@linaro.org> Acked-by: Cornelia Huck <cohuck@redhat.com> Reviewed-by: Eric Auger <eric.auger@redhat.com> Tested-by: Eric Auger <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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| .. | ||
| vhost-backend.h | ||
| vhost-scsi-common.h | ||
| vhost-scsi.h | ||
| vhost-user-blk.h | ||
| vhost-user-fs.h | ||
| vhost-user-i2c.h | ||
| vhost-user-rng.h | ||
| vhost-user-scsi.h | ||
| vhost-user-vsock.h | ||
| vhost-user.h | ||
| vhost-vdpa.h | ||
| vhost-vsock-common.h | ||
| vhost-vsock.h | ||
| vhost.h | ||
| virtio-access.h | ||
| virtio-balloon.h | ||
| virtio-blk.h | ||
| virtio-bus.h | ||
| virtio-crypto.h | ||
| virtio-gpu-bswap.h | ||
| virtio-gpu-pci.h | ||
| virtio-gpu-pixman.h | ||
| virtio-gpu.h | ||
| virtio-input.h | ||
| virtio-iommu.h | ||
| virtio-mem.h | ||
| virtio-mmio.h | ||
| virtio-net.h | ||
| virtio-pmem.h | ||
| virtio-rng.h | ||
| virtio-scsi.h | ||
| virtio-serial.h | ||
| virtio.h | ||