kernel/linux
0
Fork 0
mirror of https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/ synced 2026-10-26 19:14:18 +00:00
Code Issues Releases Packages Activity
linux/drivers/s390
History
Tony Krowiak 72125978d7 s390/vfio-ap: fix sysfs status attribute for AP queue devices 
[ Upstream commit a0d8f4eeb7 ]

The 'status' attribute for AP queue devices bound to the vfio_ap device
driver displays incorrect status when the mediated device is attached to a
guest, but the queue device is not passed through. In the current
implementation, the status displayed is 'in_use' which is not correct; it
should be 'assigned'. This can happen if one of the queue devices
associated with a given adapter is not bound to the vfio_ap device driver.
For example:

Queues listed in /sys/bus/ap/drivers/vfio_ap:
14.0005
14.0006
14.000d
16.0006
16.000d

Queues listed in /sys/devices/vfio_ap/matrix/$UUID/matrix
14.0005
14.0006
14.000d
16.0005
16.0006
16.000d

Queues listed in /sys/devices/vfio_ap/matrix/$UUID/guest_matrix
14.0005
14.0006
14.000d

The reason no queues for adapter 0x16 are listed in the guest_matrix is
because queue 16.0005 is not bound to the vfio_ap device driver, so no
queue associated with the adapter is passed through to the guest;
therefore, each queue device for adapter 0x16 should display 'assigned'
instead of 'in_use', because those queues are not in use by a guest, but
only assigned to the mediated device.

Let's check the AP configuration for the guest to determine whether a
queue device is passed through before displaying a status of 'in_use'.

Signed-off-by: Tony Krowiak <akrowiak@linux.ibm.com>
Acked-by: Halil Pasic <pasic@linux.ibm.com>
Acked-by: Harald Freudenberger <freude@linux.ibm.com>
Link: https://lore.kernel.org/r/20231108201135.351419-1-akrowiak@linux.ibm.com
Signed-off-by: Alexander Gordeev <agordeev@linux.ibm.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
History 2024-02-05 20:16:48 +00:00
..
block s390 updates for 6.7-rc7 2023-12-20 16:12:39 -08:00
char s390/sclp: replace deprecated strncpy with strtomem 2023-10-25 15:08:30 +02:00
cio s390 updates for the 6.7 merge window 2023-11-03 10:17:22 -10:00
crypto s390/vfio-ap: fix sysfs status attribute for AP queue devices 2024-02-05 20:16:48 +00:00
net s390/ism: ism driver implies smc protocol 2023-11-17 00:31:00 +00:00
scsi scsi: zfcp: Fix a double put in zfcp_port_enqueue() 2023-09-27 11:31:20 -04:00
virtio s390/airq: remove lsi_mask from airq_struct 2023-08-30 11:03:28 +02:00
Makefile s390: remove pointless drivers-y in drivers/s390/Makefile 2019-09-16 13:21:51 +02:00