[Xen-devel] Xen: ARM: Support to map mmio region specified in static ACPI tables

[Jiandi An <anjiandi@xxxxxxxxxxxxxx>]

Hi Guys,

Xen currently does not handle mapping mmio regions specified in standard static 
ACPI tables such as BERT, TPM2, GT block, IORT, HEST, etc.  There has been some 
initial discussions on using whitelist and leave it up to the individual 
drivers in dom0 who need the particular region in particular ACPI static table 
to be mapped to add the support of calling back to XEN to request the mapping.  
Just want to get the discussion started and gather consensus on this approach.  
This means in each driver in dom0 logic is inserted to check for if running 
under Xen being dom0, then call hypercall to XEN to request mapping.  
Maintainers for individual drivers (BERT driver, TPM driver, etc) may not like 
this idea for inserting XEN specific checking and mapping call in the driver 
right?

Thanks.

-- 
Jiandi An
Qualcomm Datacenter Technologies, Inc. as an affiliate of Qualcomm 
Technologies, Inc.
Qualcomm Technologies, Inc. is a member of the Code Aurora Forum, a Linux 
Foundation Collaborative Project.

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