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State of contrib/vhost-user-input?
From: |
Alex Bennée |
Subject: |
State of contrib/vhost-user-input? |
Date: |
Mon, 23 Oct 2023 17:18:24 +0100 |
User-agent: |
mu4e 1.11.22; emacs 29.1.90 |
Hi,
I'm trying to get the contrib/vhost-user-input working but it exits
during the boot up sequence:
➜ gdb --args ./vhost-user-input -p /dev/input/event22 -s /tmp/mouse.sock
GNU gdb (GDB) 15.0.50.20231012-git
<snip>
Reading symbols from ./vhost-user-input...
(gdb) b map_ring
Breakpoint 1 at 0x7634c: file
../../subprojects/libvhost-user/libvhost-user.c, line 618.
(gdb) r
Starting program:
/home/alex/lsrc/qemu.git/builds/arm.debug/contrib/vhost-user-input/vhost-user-input
-p /dev/input/event22 -s /tmp/mouse.sock
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
[New Thread 0x7ffff7afb6c0 (LWP 3807698)]
================ Vhost user message ================
Request: VHOST_USER_GET_FEATURES (1)
Flags: 0x1
Size: 0
Sending back to guest u64: 0x0000000175000000
================ Vhost user message ================
Request: VHOST_USER_GET_PROTOCOL_FEATURES (15)
Flags: 0x1
Size: 0
================ Vhost user message ================
Request: VHOST_USER_SET_PROTOCOL_FEATURES (16)
Flags: 0x1
Size: 8
u64: 0x0000000000008e2b
================ Vhost user message ================
Request: VHOST_USER_GET_QUEUE_NUM (17)
Flags: 0x1
Size: 0
================ Vhost user message ================
Request: VHOST_USER_GET_MAX_MEM_SLOTS (36)
Flags: 0x1
Size: 0
u64: 0x0000000000000020
================ Vhost user message ================
Request: VHOST_USER_SET_BACKEND_REQ_FD (21)
Flags: 0x9
Size: 0
Fds: 6
Got backend_fd: 6
================ Vhost user message ================
Request: VHOST_USER_SET_OWNER (3)
Flags: 0x1
Size: 0
================ Vhost user message ================
Request: VHOST_USER_GET_FEATURES (1)
Flags: 0x1
Size: 0
Sending back to guest u64: 0x0000000175000000
================ Vhost user message ================
Request: VHOST_USER_SET_VRING_CALL (13)
Flags: 0x1
Size: 8
Fds: 7
u64: 0x0000000000000000
Got call_fd: 7 for vq: 0
================ Vhost user message ================
Request: VHOST_USER_SET_VRING_ERR (14)
Flags: 0x1
Size: 8
Fds: 8
u64: 0x0000000000000000
================ Vhost user message ================
Request: VHOST_USER_SET_VRING_CALL (13)
Flags: 0x1
Size: 8
Fds: 9
u64: 0x0000000000000001
Got call_fd: 9 for vq: 1
================ Vhost user message ================
Request: VHOST_USER_SET_VRING_ERR (14)
Flags: 0x1
Size: 8
Fds: 10
u64: 0x0000000000000001
================ Vhost user message ================
Request: VHOST_USER_GET_CONFIG (24)
Flags: 0x1
Size: 148
================ Vhost user message ================
Request: VHOST_USER_GET_CONFIG (24)
Flags: 0x1
Size: 148
================ Vhost user message ================
Request: VHOST_USER_GET_CONFIG (24)
Flags: 0x1
Size: 148
================ Vhost user message ================
Request: VHOST_USER_GET_CONFIG (24)
Flags: 0x1
Size: 148
================ Vhost user message ================
Request: VHOST_USER_GET_CONFIG (24)
Flags: 0x1
Size: 148
================ Vhost user message ================
Request: VHOST_USER_GET_CONFIG (24)
Flags: 0x1
Size: 148
================ Vhost user message ================
Request: VHOST_USER_GET_CONFIG (24)
Flags: 0x1
Size: 148
================ Vhost user message ================
Request: VHOST_USER_GET_CONFIG (24)
Flags: 0x1
Size: 148
================ Vhost user message ================
Request: VHOST_USER_GET_CONFIG (24)
Flags: 0x1
Size: 148
================ Vhost user message ================
Request: VHOST_USER_GET_CONFIG (24)
Flags: 0x1
Size: 148
================ Vhost user message ================
Request: VHOST_USER_GET_CONFIG (24)
Flags: 0x1
Size: 148
================ Vhost user message ================
Request: VHOST_USER_GET_CONFIG (24)
Flags: 0x1
Size: 148
================ Vhost user message ================
Request: VHOST_USER_SET_FEATURES (2)
Flags: 0x1
Size: 8
u64: 0x0000000170000000
================ Vhost user message ================
Request: VHOST_USER_SET_VRING_NUM (8)
Flags: 0x1
Size: 8
State.index: 0
State.num: 64
================ Vhost user message ================
Request: VHOST_USER_SET_VRING_BASE (10)
Flags: 0x1
Size: 8
State.index: 0
State.num: 0
================ Vhost user message ================
Request: VHOST_USER_SET_VRING_ADDR (9)
Flags: 0x1
Size: 40
vhost_vring_addr:
index: 0
flags: 0
desc_user_addr: 0x00007f283491a000
used_user_addr: 0x00007f283491a4c0
avail_user_addr: 0x00007f283491a400
log_guest_addr: 0x0000000100b1a4c0
Thread 1 "vhost-user-inpu" hit Breakpoint 1, map_ring (dev=0x7fffffffdd60,
vq=0x555555609ea0) at ../../subprojects/libvhost-user/libvhost-user.c:618
warning: Source file is more recent than executable.
618 vq->vring.desc = qva_to_va(dev, vq->vra.desc_user_addr);
(gdb) s
qva_to_va (dev=0x7fffffffdd60, qemu_addr=139810657378304) at
../../subprojects/libvhost-user/libvhost-user.c:231
231 for (i = 0; i < dev->nregions; i++) {
(gdb) p dev->nregions
$1 = 0
(gdb) n
240 return NULL;
(gdb)
241 }
(gdb) c
Continuing.
Setting virtq addresses:
vring_desc at (nil)
vring_used at (nil)
vring_avail at (nil)
** (vhost-user-input:3807669): CRITICAL **: 17:16:14.554: Invalid vring_addr
message
[Thread 0x7ffff7afb6c0 (LWP 3807698) exited]
[Inferior 1 (process 3807669) exited with code 01]
(gdb) q
Which looks like libvhost-user is expecting
VHOST_USER_PROTOCOL_F_CONFIGURE_MEM_SLOTS to be negotiated and the
resulting VHOST_USER_ADD_MEM_REG to be sent. How is this meant to work
if the protocol feature isn't negotiated?
--
Alex Bennée
Virtualisation Tech Lead @ Linaro
- State of contrib/vhost-user-input?,
Alex Bennée <=