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Re: [PATCH v2 1/2] IOMMU/x86: disallow device assignment to PoD guests
- To: "xen-devel@xxxxxxxxxxxxxxxxxxxx" <xen-devel@xxxxxxxxxxxxxxxxxxxx>
- From: Jan Beulich <jbeulich@xxxxxxxx>
- Date: Thu, 9 Dec 2021 11:04:36 +0100
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- Cc: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>, Wei Liu <wl@xxxxxxx>, Roger Pau Monné <roger.pau@xxxxxxxxxx>, George Dunlap <george.dunlap@xxxxxxxxxx>, Paul Durrant <paul@xxxxxxx>, Tamas K Lengyel <tamas@xxxxxxxxxxxxx>, Petre Pircalabu <ppircalabu@xxxxxxxxxxxxxxx>, Alexandru Isaila <aisaila@xxxxxxxxxxxxxxx>
- Delivery-date: Thu, 09 Dec 2021 10:05:03 +0000
- List-id: Xen developer discussion <xen-devel.lists.xenproject.org>
On 01.12.2021 12:20, Jan Beulich wrote:
> @@ -333,6 +334,9 @@ p2m_pod_set_mem_target(struct domain *d,
> int ret = 0;
> unsigned long populated, pod_target;
>
> + if ( has_arch_pdevs(d) || cache_flush_permitted(d) )
> + return -ENOTEMPTY;
This breaks toolstack based ballooning of PVH Dom0. While I question
the invocation of set_pod_target in that case, for v3 I'm moving the
check down to near the end of the function.
Jan
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