versal: add LPD SLCR #19
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kay-ge
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This commit copies the versal LPD SLCR skeleton implementation
from the Xilinx QEMU fork unchanged. This is intended to be
integrated into the Versal SoC definition.
Taken from commit SHA
554c25a60d432da639a72acfce893b40e1487e7c
Signed-off-by: Nelson Ho <[email protected]>
Move the LPD SLCR device state structure into a header file to be included in versal SoC implementation. Signed-off-by: Nelson Ho <[email protected]>
Meson changes to build xlnx-versal-lpd-slcr device when build configuration includes versal soc. Signed-off-by: Nelson Ho <[email protected]>
Realize the low power domain system level control registers as part of Versal SoC and map the control registers into the PS address space. Signed-off-by: Nelson Ho <[email protected]>
At some point between the Xilinx QEMU fork base and 9.1, it has become enforced that qom type names do not contain commas. This change replaces the comma in the type name for the LPD_SLCR to fix the illegal type name error that occurs when registering the device. Signed-off-by: Nelson Ho <[email protected]>
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Allow overlapping request by removing the assert that made it
impossible. There are only two callers:
1. block_copy_task_create()
It already asserts the very same condition before calling
reqlist_init_req().
2. cbw_snapshot_read_lock()
There is no need to have read requests be non-overlapping in
copy-before-write when used for snapshot-access. In fact, there was no
protection against two callers of cbw_snapshot_read_lock() calling
reqlist_init_req() with overlapping ranges and this could lead to an
assertion failure [1].
In particular, with the reproducer script below [0], two
cbw_co_snapshot_block_status() callers could race, with the second
calling reqlist_init_req() before the first one finishes and removes
its conflicting request.
[0]:
> #!/bin/bash -e
> dd if=/dev/urandom of=/tmp/disk.raw bs=1M count=1024
> ./qemu-img create /tmp/fleecing.raw -f raw 1G
> (
> ./qemu-system-x86_64 --qmp stdio \
> --blockdev raw,node-name=node0,file.driver=file,file.filename=/tmp/disk.raw \
> --blockdev raw,node-name=node1,file.driver=file,file.filename=/tmp/fleecing.raw \
> <<EOF
> {"execute": "qmp_capabilities"}
> {"execute": "blockdev-add", "arguments": { "driver": "copy-before-write", "file": "node0", "target": "node1", "node-name": "node3" } }
> {"execute": "blockdev-add", "arguments": { "driver": "snapshot-access", "file": "node3", "node-name": "snap0" } }
> {"execute": "nbd-server-start", "arguments": {"addr": { "type": "unix", "data": { "path": "/tmp/nbd.socket" } } } }
> {"execute": "block-export-add", "arguments": {"id": "exp0", "node-name": "snap0", "type": "nbd", "name": "exp0"}}
> EOF
> ) &
> sleep 5
> while true; do
> ./qemu-nbd -d /dev/nbd0
> ./qemu-nbd -c /dev/nbd0 nbd:unix:/tmp/nbd.socket:exportname=exp0 -f raw -r
> nbdinfo --map 'nbd+unix:///exp0?socket=/tmp/nbd.socket'
> done
[1]:
> Wind-River#5 0x000071e5f0088eb2 in __GI___assert_fail (...) at ./assert/assert.c:101
> Wind-River#6 0x0000615285438017 in reqlist_init_req (...) at ../block/reqlist.c:23
> Wind-River#7 0x00006152853e2d98 in cbw_snapshot_read_lock (...) at ../block/copy-before-write.c:237
> Wind-River#8 0x00006152853e3068 in cbw_co_snapshot_block_status (...) at ../block/copy-before-write.c:304
> Wind-River#9 0x00006152853f4d22 in bdrv_co_snapshot_block_status (...) at ../block/io.c:3726
> Wind-River#10 0x000061528543a63e in snapshot_access_co_block_status (...) at ../block/snapshot-access.c:48
> Wind-River#11 0x00006152853f1a0a in bdrv_co_do_block_status (...) at ../block/io.c:2474
> Wind-River#12 0x00006152853f2016 in bdrv_co_common_block_status_above (...) at ../block/io.c:2652
> Wind-River#13 0x00006152853f22cf in bdrv_co_block_status_above (...) at ../block/io.c:2732
> Wind-River#14 0x00006152853d9a86 in blk_co_block_status_above (...) at ../block/block-backend.c:1473
> Wind-River#15 0x000061528538da6c in blockstatus_to_extents (...) at ../nbd/server.c:2374
> Wind-River#16 0x000061528538deb1 in nbd_co_send_block_status (...) at ../nbd/server.c:2481
> Wind-River#17 0x000061528538f424 in nbd_handle_request (...) at ../nbd/server.c:2978
> Wind-River#18 0x000061528538f906 in nbd_trip (...) at ../nbd/server.c:3121
> Wind-River#19 0x00006152855a7caf in coroutine_trampoline (...) at ../util/coroutine-ucontext.c:175
Cc: [email protected]
Suggested-by: Vladimir Sementsov-Ogievskiy <[email protected]>
Signed-off-by: Fiona Ebner <[email protected]>
Message-Id: <[email protected]>
Reviewed-by: Vladimir Sementsov-Ogievskiy <[email protected]>
Signed-off-by: Vladimir Sementsov-Ogievskiy <[email protected]>
(cherry picked from commit 6475155d519209c80fdda53e05130365aa769838)
Signed-off-by: Michael Tokarev <[email protected]>
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Add the low power domain system level control register to the Versal SoC definition.