From: Halil Pasic <pasic@linux.ibm.com>
To: Pierre Morel <pmorel@linux.ibm.com>
Cc: gor@linux.ibm.com, linux-s390@vger.kernel.org,
frankja@linux.ibm.com, kvm@vger.kernel.org, mst@redhat.com,
cohuck@redhat.com, linuxram@us.ibm.com,
linux-kernel@vger.kernel.org,
virtualization@lists.linux-foundation.org,
borntraeger@de.ibm.com, thomas.lendacky@amd.com,
hca@linux.ibm.com, david@gibson.dropbear.id.au
Subject: Re: [PATCH v11 1/2] virtio: let arch advertise guest's memory access restrictions
Date: Tue, 8 Sep 2020 00:22:12 +0200 [thread overview]
Message-ID: <20200908002212.462303b4.pasic@linux.ibm.com> (raw)
In-Reply-To: <1599471547-28631-2-git-send-email-pmorel@linux.ibm.com>
On Mon, 7 Sep 2020 11:39:06 +0200
Pierre Morel <pmorel@linux.ibm.com> wrote:
> An architecture may restrict host access to guest memory,
> e.g. IBM s390 Secure Execution or AMD SEV.
>
> Provide a new Kconfig entry the architecture can select,
> CONFIG_ARCH_HAS_RESTRICTED_VIRTIO_MEMORY_ACCESS, when it provides
> the arch_has_restricted_virtio_memory_access callback to advertise
> to VIRTIO common code when the architecture restricts memory access
> from the host.
>
> The common code can then fail the probe for any device where
> VIRTIO_F_ACCESS_PLATFORM is required, but not set.
>
> Signed-off-by: Pierre Morel <pmorel@linux.ibm.com>
> Reviewed-by: Cornelia Huck <cohuck@redhat.com>
Reviewed-by: Halil Pasic <pasic@linux.ibm.com>
[..]
>
> +config ARCH_HAS_RESTRICTED_VIRTIO_MEMORY_ACCESS
> + bool
> + help
> + This option is selected if the architecture may need to enforce
> + VIRTIO_F_IOMMU_PLATFORM.
> +
A small nit: you use F_ACCESS_PLATFORM everywhere but here.
Regards,
Halil
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next prev parent reply other threads:[~2020-09-07 22:22 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-09-07 9:39 [PATCH v11 0/2] s390: virtio: let arch validate VIRTIO features Pierre Morel
2020-09-07 9:39 ` [PATCH v11 1/2] virtio: let arch advertise guest's memory access restrictions Pierre Morel
2020-09-07 22:22 ` Halil Pasic [this message]
2020-09-07 9:39 ` [PATCH v11 2/2] s390: virtio: PV needs VIRTIO I/O device protection Pierre Morel
2020-09-07 22:37 ` Halil Pasic
2020-09-08 13:39 ` kernel test robot
2020-09-07 22:39 ` [PATCH v11 0/2] s390: virtio: let arch validate VIRTIO features Halil Pasic
2020-09-08 6:55 ` Cornelia Huck
2020-09-08 8:35 ` Michael S. Tsirkin
2020-09-08 7:57 ` Michael S. Tsirkin
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