linux-kernel - Re: [PATCH v3 0/7] virtio-mem: s390 support

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Message-ID: <20241030093453.6264-H-hca@linux.ibm.com>
Date: Wed, 30 Oct 2024 10:34:53 +0100
From: Heiko Carstens <hca@...ux.ibm.com>
To: David Hildenbrand <david@...hat.com>
Cc: linux-kernel@...r.kernel.org, linux-mm@...ck.org,
        linux-s390@...r.kernel.org, virtualization@...ts.linux.dev,
        linux-doc@...r.kernel.org, kvm@...r.kernel.org,
        Vasily Gorbik <gor@...ux.ibm.com>,
        Alexander Gordeev <agordeev@...ux.ibm.com>,
        Christian Borntraeger <borntraeger@...ux.ibm.com>,
        Sven Schnelle <svens@...ux.ibm.com>, Thomas Huth <thuth@...hat.com>,
        Cornelia Huck <cohuck@...hat.com>,
        Janosch Frank <frankja@...ux.ibm.com>,
        Claudio Imbrenda <imbrenda@...ux.ibm.com>,
        "Michael S. Tsirkin" <mst@...hat.com>,
        Jason Wang <jasowang@...hat.com>,
        Xuan Zhuo <xuanzhuo@...ux.alibaba.com>,
        Eugenio Pérez <eperezma@...hat.com>,
        Eric Farman <farman@...ux.ibm.com>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Jonathan Corbet <corbet@....net>
Subject: Re: [PATCH v3 0/7] virtio-mem: s390 support

On Fri, Oct 25, 2024 at 04:14:45PM +0200, David Hildenbrand wrote:
> Let's finally add s390 support for virtio-mem; my last RFC was sent
> 4 years ago, and a lot changed in the meantime.
> 
> The latest QEMU series is available at [1], which contains some more
> details and a usage example on s390 (last patch).
> 
> There is not too much in here: The biggest part is querying a new diag(500)
> STORAGE_LIMIT hypercall to obtain the proper "max_physmem_end".

...

> David Hildenbrand (7):
>   Documentation: s390-diag.rst: make diag500 a generic KVM hypercall
>   Documentation: s390-diag.rst: document diag500(STORAGE LIMIT)
>     subfunction
>   s390/physmem_info: query diag500(STORAGE LIMIT) to support QEMU/KVM
>     memory devices
>   virtio-mem: s390 support
>   lib/Kconfig.debug: default STRICT_DEVMEM to "y" on s390
>   s390/sparsemem: reduce section size to 128 MiB
>   s390/sparsemem: provide memory_add_physaddr_to_nid() with CONFIG_NUMA
> 
>  Documentation/virt/kvm/s390/s390-diag.rst | 35 +++++++++++++----
>  arch/s390/boot/physmem_info.c             | 47 ++++++++++++++++++++++-
>  arch/s390/boot/startup.c                  |  7 +++-
>  arch/s390/include/asm/physmem_info.h      |  3 ++
>  arch/s390/include/asm/sparsemem.h         | 10 ++++-
>  drivers/virtio/Kconfig                    | 12 +++---
>  lib/Kconfig.debug                         |  2 +-
>  7 files changed, 98 insertions(+), 18 deletions(-)

I'll apply the whole series as soon as there are ACKs for the third
patch, and from the KVM guys for the whole series.
Christian, Janosch, Claudio?