Re: [Xen-devel] [PATCH] VT-d: fix and extend RMRR reservation check

["Tian, Kevin" <kevin.tian@xxxxxxxxx>]

> From: Jan Beulich <jbeulich@xxxxxxxx>
> Sent: Thursday, February 27, 2020 7:15 PM
> 
> First of all in commit d6573bc6e6b7 ("VT-d: check all of an RMRR for
> being E820-reserved") along with changing the function used, the enum-
> like value passed should have been changed too (to E820_*). Do so now.
> (Luckily the actual values of RAM_TYPE_RESERVED and E820_RESERVED
> match, so the breakage introduced was "only" latent.)
> 
> Furthermore one of my systems surfaces RMRR in an ACPI NVS E820 range.
> The purpose of the check is just to make sure there won't be "ordinary"
> mappings of these ranges, and domains (including Dom0) won't want to
> use the region to e.g. put PCI device BARs there. The two ACPI related
> E820 types are good enough for this purpose, so allow them as well.
> 
> Signed-off-by: Jan Beulich <jbeulich@xxxxxxxx>

Reviewed-by: Kevin Tian <kevin.tian@xxxxxxxxx>
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