Re: [Xen-devel] [RFC v2] xen/arm: Suspend to RAM Support in Xen for ARM

[Oleksandr Tyshchenko <olekstysh@xxxxxxxxx>]

Hi Mirela,

Just some remarks regarding the scope of work:

+In addition, the following have to be implemented:
+* Suspend/resume vCPU (triggered by vSYSTEM_SUSPEND call)
+* Suspend/resume Xen (triggered by vSYSTEM_SUSPEND called by Dom0), including:
+       * Disable wathdog on suspend, enable it on resume
+       * Pause domains on suspend, unpause them on resume
+       * Disable non-boot pCPUs on suspend, enable them on resume
+       * Save/restore of GIC configuration
+       * Suspend/resume timer
+       * Save/restore of EL2 context
+       * Implement resume entry point in Xen, including MMU configuration

I think that saving/restoring IOMMU registers/context should be
implemented as well.
In other words, each involved platform device driver in Xen on ARM
(IOMMU-XX, UART-XX, etc) should have suspend/resume callbacks
implemented.

-- 
Regards,

Oleksandr Tyshchenko

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