SOF FW boot fails on HSW/BDW #10
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Currently offloads disabled by guest via the VIRTIO_NET_CTRL_GUEST_OFFLOADS_SET command are not preserved on VM migration. Instead all offloads reported by guest features (via VIRTIO_PCI_GUEST_FEATURES) get enabled. What happens is: first the VirtIONet::curr_guest_offloads gets restored and offloads are getting set correctly: #0 qemu_set_offload (nc=0x555556a11400, csum=1, tso4=0, tso6=0, ecn=0, ufo=0) at net/net.c:474 thesofproject#1 virtio_net_apply_guest_offloads (n=0x555557701ca0) at hw/net/virtio-net.c:720 thesofproject#2 virtio_net_post_load_device (opaque=0x555557701ca0, version_id=11) at hw/net/virtio-net.c:2334 thesofproject#3 vmstate_load_state (f=0x5555569dc010, vmsd=0x555556577c80 <vmstate_virtio_net_device>, opaque=0x555557701ca0, version_id=11) at migration/vmstate.c:168 thesofproject#4 virtio_load (vdev=0x555557701ca0, f=0x5555569dc010, version_id=11) at hw/virtio/virtio.c:2197 thesofproject#5 virtio_device_get (f=0x5555569dc010, opaque=0x555557701ca0, size=0, field=0x55555668cd00 <__compound_literal.5>) at hw/virtio/virtio.c:2036 thesofproject#6 vmstate_load_state (f=0x5555569dc010, vmsd=0x555556577ce0 <vmstate_virtio_net>, opaque=0x555557701ca0, version_id=11) at migration/vmstate.c:143 thesofproject#7 vmstate_load (f=0x5555569dc010, se=0x5555578189e0) at migration/savevm.c:829 thesofproject#8 qemu_loadvm_section_start_full (f=0x5555569dc010, mis=0x5555569eee20) at migration/savevm.c:2211 thesofproject#9 qemu_loadvm_state_main (f=0x5555569dc010, mis=0x5555569eee20) at migration/savevm.c:2395 thesofproject#10 qemu_loadvm_state (f=0x5555569dc010) at migration/savevm.c:2467 thesofproject#11 process_incoming_migration_co (opaque=0x0) at migration/migration.c:449 However later on the features are getting restored, and offloads get reset to everything supported by features: #0 qemu_set_offload (nc=0x555556a11400, csum=1, tso4=1, tso6=1, ecn=0, ufo=0) at net/net.c:474 thesofproject#1 virtio_net_apply_guest_offloads (n=0x555557701ca0) at hw/net/virtio-net.c:720 thesofproject#2 virtio_net_set_features (vdev=0x555557701ca0, features=5104441767) at hw/net/virtio-net.c:773 thesofproject#3 virtio_set_features_nocheck (vdev=0x555557701ca0, val=5104441767) at hw/virtio/virtio.c:2052 thesofproject#4 virtio_load (vdev=0x555557701ca0, f=0x5555569dc010, version_id=11) at hw/virtio/virtio.c:2220 thesofproject#5 virtio_device_get (f=0x5555569dc010, opaque=0x555557701ca0, size=0, field=0x55555668cd00 <__compound_literal.5>) at hw/virtio/virtio.c:2036 thesofproject#6 vmstate_load_state (f=0x5555569dc010, vmsd=0x555556577ce0 <vmstate_virtio_net>, opaque=0x555557701ca0, version_id=11) at migration/vmstate.c:143 thesofproject#7 vmstate_load (f=0x5555569dc010, se=0x5555578189e0) at migration/savevm.c:829 thesofproject#8 qemu_loadvm_section_start_full (f=0x5555569dc010, mis=0x5555569eee20) at migration/savevm.c:2211 thesofproject#9 qemu_loadvm_state_main (f=0x5555569dc010, mis=0x5555569eee20) at migration/savevm.c:2395 thesofproject#10 qemu_loadvm_state (f=0x5555569dc010) at migration/savevm.c:2467 thesofproject#11 process_incoming_migration_co (opaque=0x0) at migration/migration.c:449 Fix this by preserving the state in saved_guest_offloads field and pushing out offload initialization to the new post load hook. Cc: qemu-stable@nongnu.org Signed-off-by: Mikhail Sennikovsky <mikhail.sennikovskii@cloud.ionos.com> Signed-off-by: Jason Wang <jasowang@redhat.com>
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SOF FW boot fails with with HSW/BDW targets when QEMU host side is also used.
No messages are seen in the shim region. Additional fixes are needed on top of the recently merged fixes to BYT host side.
Version used:
Branch: 57eac17 (sof-stable)
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