Re: [Xen-devel] [PATCH RFC 5/5] pvh: dom0 boot option to specify iommu rw ranges

[Andrew Cooper <andrew.cooper3@xxxxxxxxxx>]

On 17/02/15 12:36, Jan Beulich wrote:
>>>> On 14.02.15 at 00:21, <elena.ufimtseva@xxxxxxxxxx> wrote:
>> On Fri, Feb 13, 2015 at 10:09:39PM +0000, Andrew Cooper wrote:
>>> If I understand the problem correctly, I believe that the correct
>>> solution would be to add a dmar_rmrr[ command line parameter along the
>>> same lines as ivrs_hpet[ and ivrs_ioapic[ which allows the user to
>>> inject corrections to the ACPI tables via the command line.
>> Yes, if we agree to classify those magic locations as being not reported
>> by ACPI machinery.
> One fundamental problem for someone to use this proposed option
> in practice is - how does(s)he learn which region(s) to specify?

Trial and improvement, or find a manual for the affected system.

~Andrew

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