From: Farhan Ali <alifm@linux.ibm.com>
To: Eric Farman <farman@linux.ibm.com>,
linux-s390@vger.kernel.org, kvm@vger.kernel.org,
linux-kernel@vger.kernel.org
Cc: Matthew Rosato <mjrosato@linux.ibm.com>,
Halil Pasic <pasic@linux.ibm.com>,
Christian Borntraeger <borntraeger@linux.ibm.com>,
stable@vger.kernel.org
Subject: Re: [PATCH v7 10/10] s390/vfio_ccw: implement a crw lock
Date: Mon, 27 Jul 2026 14:35:53 -0700 [thread overview]
Message-ID: <73119673-8b77-4f39-a313-a199e8da55a9@linux.ibm.com> (raw)
In-Reply-To: <20260727192230.2715207-11-farman@linux.ibm.com>
On 7/27/2026 12:22 PM, Eric Farman wrote:
> Unlike the channel_program struct, which covers synchronous I/O
> submissions and asynchronous interrupts, the CRW region relies
> exclusively on asynchronous events coming from hardware.
>
> Implement a lock to manage the list of those payloads, to ensure
> they are read cohesively.
>
> Fixes: 3f02cb2fd9d2 ("vfio-ccw: Wire up the CRW irq and CRW region")
> Cc:stable@vger.kernel.org
> Cc: Farhan Ali<alifm@linux.ibm.com>
> Reviewed-by: Matthew Rosato<mjrosato@linux.ibm.com>
> Signed-off-by: Eric Farman<farman@linux.ibm.com>
> ---
> drivers/s390/cio/vfio_ccw_chp.c | 26 ++++++++++++++++----------
> drivers/s390/cio/vfio_ccw_drv.c | 6 ++++++
> drivers/s390/cio/vfio_ccw_ops.c | 4 ++++
> drivers/s390/cio/vfio_ccw_private.h | 4 ++++
> 4 files changed, 30 insertions(+), 10 deletions(-)
Reviewed-by: Farhan Ali<alifm@linux.ibm.com>
prev parent reply other threads:[~2026-07-27 21:35 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-07-27 19:22 [PATCH v7 00/10] s390/vfio_ccw fixes Eric Farman
2026-07-27 19:22 ` [PATCH v7 01/10] s390/vfio_ccw: free all memory if cp_init() fails Eric Farman
2026-07-27 19:22 ` [PATCH v7 02/10] s390/vfio_ccw: limit the number of channel program segments Eric Farman
2026-07-27 19:22 ` [PATCH v7 03/10] s390/vfio_ccw: fix out of bounds check on CCW array Eric Farman
2026-07-27 19:22 ` [PATCH v7 04/10] s390/vfio_ccw: ensure first IDAW remains constant Eric Farman
2026-07-27 19:22 ` [PATCH v7 05/10] s390/vfio_ccw: calculate idal length based on idaw type Eric Farman
2026-07-27 19:22 ` [PATCH v7 06/10] s390/vfio_ccw: ensure index for read/write regions are within range Eric Farman
2026-07-27 19:22 ` [PATCH v7 07/10] s390/vfio_ccw: cancel existing workqueues Eric Farman
2026-07-27 21:54 ` Matthew Rosato
2026-07-27 19:22 ` [PATCH v7 08/10] s390/vfio_ccw: move cp cleanup out of not operational Eric Farman
2026-07-27 21:54 ` Matthew Rosato
2026-07-28 0:54 ` Eric Farman
2026-07-27 19:22 ` [PATCH v7 09/10] s390/vfio_ccw: selectively expand io_mutex Eric Farman
2026-07-27 19:22 ` [PATCH v7 10/10] s390/vfio_ccw: implement a crw lock Eric Farman
2026-07-27 21:35 ` Farhan Ali [this message]
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