* State of contrib/vhost-user-input?
@ 2023-10-23 16:18 Alex Bennée
2023-10-23 23:14 ` Stefan Hajnoczi
2023-10-24 11:36 ` Marc-André Lureau
0 siblings, 2 replies; 5+ messages in thread
From: Alex Bennée @ 2023-10-23 16:18 UTC (permalink / raw)
To: Marc-André Lureau, Stefan Hajnoczi, Michael S. Tsirkin
Cc: Leo Yan, qemu-devel
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
^ permalink raw reply [flat|nested] 5+ messages in thread
* Re: State of contrib/vhost-user-input?
2023-10-23 16:18 State of contrib/vhost-user-input? Alex Bennée
@ 2023-10-23 23:14 ` Stefan Hajnoczi
2023-10-24 11:36 ` Marc-André Lureau
1 sibling, 0 replies; 5+ messages in thread
From: Stefan Hajnoczi @ 2023-10-23 23:14 UTC (permalink / raw)
To: Alex Bennée, Gerd Hoffmann
Cc: Marc-André Lureau, Stefan Hajnoczi, Michael S. Tsirkin,
Leo Yan, qemu-devel
On Mon, 23 Oct 2023 at 09:29, Alex Bennée <alex.bennee@linaro.org> wrote:
>
>
> Hi,
CCing Gerd for vhost-user-input.
>
> 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
>
^ permalink raw reply [flat|nested] 5+ messages in thread
* Re: State of contrib/vhost-user-input?
2023-10-23 16:18 State of contrib/vhost-user-input? Alex Bennée
2023-10-23 23:14 ` Stefan Hajnoczi
@ 2023-10-24 11:36 ` Marc-André Lureau
2023-10-24 14:32 ` Alex Bennée
1 sibling, 1 reply; 5+ messages in thread
From: Marc-André Lureau @ 2023-10-24 11:36 UTC (permalink / raw)
To: Alex Bennée; +Cc: Stefan Hajnoczi, Michael S. Tsirkin, Leo Yan, qemu-devel
Hi Alex
On Mon, Oct 23, 2023 at 8:34 PM Alex Bennée <alex.bennee@linaro.org> wrote:
>
>
> 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?
How did you start QEMU ? Did you forget to use shared memory ? We
should probably add some error at QEMU level when vhost-user devices
are used without shared memory!
^ permalink raw reply [flat|nested] 5+ messages in thread
* Re: State of contrib/vhost-user-input?
2023-10-24 11:36 ` Marc-André Lureau
@ 2023-10-24 14:32 ` Alex Bennée
2023-10-24 15:20 ` Alex Bennée
0 siblings, 1 reply; 5+ messages in thread
From: Alex Bennée @ 2023-10-24 14:32 UTC (permalink / raw)
To: Marc-André Lureau
Cc: Stefan Hajnoczi, Michael S. Tsirkin, Leo Yan, qemu-devel
Marc-André Lureau <marcandre.lureau@redhat.com> writes:
> Hi Alex
>
> On Mon, Oct 23, 2023 at 8:34 PM Alex Bennée <alex.bennee@linaro.org> wrote:
>>
>>
>> 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?
>
>
> How did you start QEMU ? Did you forget to use shared memory ?
I had:
-m 8192 \
-object memory-backend-memfd,id=mem,size=8G,share=on \
Alongside:
-device virtio-gpu-pci \
-device qemu-xhci -device usb-kbd \
-kernel ~/lsrc/linux.git/builds/arm64/arch/arm64/boot/Image.gz -append 'console=ttyAMA0 root=/dev/sda2' \
-display gtk,gl=on \
-chardev socket,id=mouse2,path=/tmp/mouse.sock -device vhost-user-input-pci,chardev=mouse2
I even double checked with the generic device I was working with:
-chardev socket,id=mouse2,path=/tmp/mouse.sock -device vhost-user-device-pci,chardev=mouse2,virtio-id=18,config_size=136,num_vqs=2
> We should probably add some error at QEMU level when vhost-user devices
> are used without shared memory!
That would certainly be a good idea.
--
Alex Bennée
Virtualisation Tech Lead @ Linaro
^ permalink raw reply [flat|nested] 5+ messages in thread
* Re: State of contrib/vhost-user-input?
2023-10-24 14:32 ` Alex Bennée
@ 2023-10-24 15:20 ` Alex Bennée
0 siblings, 0 replies; 5+ messages in thread
From: Alex Bennée @ 2023-10-24 15:20 UTC (permalink / raw)
To: Alex Bennée
Cc: Marc-André Lureau, Stefan Hajnoczi, Michael S. Tsirkin,
Leo Yan, qemu-devel
Alex Bennée <alex.bennee@linaro.org> writes:
> Marc-André Lureau <marcandre.lureau@redhat.com> writes:
>
>> Hi Alex
>>
>> On Mon, Oct 23, 2023 at 8:34 PM Alex Bennée <alex.bennee@linaro.org> wrote:
>>>
>>>
>>> Hi,
>>>
>>> I'm trying to get the contrib/vhost-user-input working but it exits
>>> during the boot up sequence:
>>>
<snip>
>>> 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?
>>
>>
>> How did you start QEMU ? Did you forget to use shared memory ?
>
> I had:
>
> -m 8192 \
> -object memory-backend-memfd,id=mem,size=8G,share=on \
>
> Alongside:
>
> -device virtio-gpu-pci \
> -device qemu-xhci -device usb-kbd \
> -kernel ~/lsrc/linux.git/builds/arm64/arch/arm64/boot/Image.gz
> -append 'console=ttyAMA0 root=/dev/sda2' \
> -display gtk,gl=on \
> -chardev socket,id=mouse2,path=/tmp/mouse.sock -device vhost-user-input-pci,chardev=mouse2
>
> I even double checked with the generic device I was working with:
>
> -chardev socket,id=mouse2,path=/tmp/mouse.sock -device
> vhost-user-device-pci,chardev=mouse2,virtio-id=18,config_size=136,num_vqs=2
Ahh but not the magic:
-numa node,memdev=mem
>
>> We should probably add some error at QEMU level when vhost-user devices
>> are used without shared memory!
>
> That would certainly be a good idea.
Where would the best place to do this check be?
--
Alex Bennée
Virtualisation Tech Lead @ Linaro
^ permalink raw reply [flat|nested] 5+ messages in thread
end of thread, other threads:[~2023-10-24 15:21 UTC | newest]
Thread overview: 5+ messages (download: mbox.gz follow: Atom feed
-- links below jump to the message on this page --
2023-10-23 16:18 State of contrib/vhost-user-input? Alex Bennée
2023-10-23 23:14 ` Stefan Hajnoczi
2023-10-24 11:36 ` Marc-André Lureau
2023-10-24 14:32 ` Alex Bennée
2023-10-24 15:20 ` Alex Bennée
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