Re: [RFC PATCH v4 0/5] Report vfio-ap configuration changes

["Cédric Le Goater" <clg@redhat.com>]

On 3/11/25 16:16, Rorie Reyes wrote:
> Changelog:
> 
> v4:
> - allocating cfg_chg_event before inserting into the queue
> - calling nt0_have_event in if loop to check if there are any
> elemenets in the queue, then calling QTAILQ_FIRST when the check
> passes
> - moving memset() after the check
> 
> v3:
> - changes that were made to patch 3/5 should have been made in
> patch 2/5
> 
> v2:
> - removed warnings that weren't needed
> - added unregister function
> - removed whitelines
> - changed variable names for consistency
> - removed rc variable and returning 1 or 0 outright
> - reversed logics for if statements
> - using g_free() instead of free()
> - replaced hardcoded numeric values by defining them with #define
> in the header
> 
> --------------------------------------------------------------------------
> This patch series creates and registers a handler that is called when
> userspace is notified by the kernel that a guest's AP configuration has
> changed. The handler in turn notifies the guest that its AP configuration
> has changed. This allows the guest to immediately respond to AP
> configuration changes rather than relying on polling or some other
> inefficient mechanism for detecting config changes.
> 
> Rorie Reyes (5):
>    linux-headers: NOTFORMERGE - placeholder uapi updates for AP config
>      change
>    hw/vfio/ap: notification handler for AP config changed event
>    hw/vfio/ap: store object indicating AP config changed in a queue
>    hw/vfio/ap: Storing event information for an AP configuration change
>      event
>    s390: implementing CHSC SEI for AP config change
> 
>   hw/vfio/ap.c                 | 82 ++++++++++++++++++++++++++++++++++++
>   include/hw/s390x/ap-bridge.h | 22 ++++++++++
>   linux-headers/linux/vfio.h   |  1 +
>   target/s390x/ioinst.c        | 11 ++++-
>   4 files changed, 114 insertions(+), 2 deletions(-)

Queued 2-5. linux-headers should be updated in the QEMU 10.1 cycle.

Thanks,

C.