Re: [PATCH 0/12] direct-map DomUs

[Julien Grall <julien@xxxxxxx>]

On 15/04/2020 02:02, Stefano Stabellini wrote:
> Hi all,
>
> This series adds support for 1:1 mapping (guest physical == physical)
> the memory of dom0less domUs. The memory ranges assigned to a domU can be
> explicitly chosen by the user at boot time.
>
> This is desirable in cases where an IOMMU is not present in the system,
> or it cannot be used. For instance, it might not be usable because it
> doesn't cover a specific device, or because it doesn't have enough
> bandwidth, or because it adds too much latency. In these cases, the user
> should use a MPU to protect the memory in the system (e.g. the Xilinx
> XMPU), configuring it with the chosen address ranges.
>
> Cheers,
>
> Stefano
>
>
>
> The following changes since commit 7372466b21c3b6c96bb7a52754e432bac883a1e3:
>
>    x86/mem_sharing: Fix build with !CONFIG_XSM (2020-04-10 15:20:10 +0100)
>
> are available in the Git repository at:
>
>    http://xenbits.xenproject.org/git-http/people/sstabellini/xen-unstable.git 
> direct-map-1
>
> for you to fetch changes up to 43503720ab6851a28a66fdd067f592d5354ae83a:
>
>    xen/arm: call iomem_permit_access for passthrough devices (2020-04-14 
> 17:42:21 -0700)
>
> ----------------------------------------------------------------
> Stefano Stabellini (12):
>        xen: introduce xen_dom_flags
>        xen/arm: introduce arch_xen_dom_flags and direct_map
>        xen/arm: introduce 1:1 mapping for domUs
>        xen: split alloc_heap_pages in two halves for reusability
>        xen: introduce reserve_heap_pages
>        xen/arm: reserve 1:1 memory for direct_map domUs
>        xen/arm: new vgic: rename vgic_cpu/dist_base to c/dbase
>        xen/arm: if is_domain_direct_mapped use native addresses for GICv2
>        xen/arm: if is_domain_direct_mapped use native addresses for GICv3
>        xen/arm: if is_domain_direct_mapped use native UART address for vPL011
The 3 patches above cover addresses but not interrupts. Why?

Cheers,

--
Julien Grall