Re: [Xen-devel] [RFC] [PATCH] arm-acpi: Hide SMMU from IORT for hardware domain

[Julien Grall <julien.grall@xxxxxxx>]

On 09/06/17 11:02, Manish Jaggi wrote:
> > > > SMMU 0
> > > > // Note that range of StreamIDs that map to DeviceIDs excludes
> > > > // the NIC 0 DeviceID as it does not generate MSIs
> > > >  // Input ID --> Output reference: Output ID
> > > > 0x0000-0x01ff --> ITS GROUP 0 : 0x10000->0x101ff
> > > > 0x0200-0xffff --> ITS GROUP 0 : 0x20000->0x207ff
> > > It can be from 2 different RC's and not from same RC.
> > It is not my point in this example. My point is same RC with split
> > DeviceID mapping.
> ok, I will add that as well.
> The current code parses all entries in pci_rc id_array and patches
> output reference and output_base.
> The only assumption was on Number of ids in pci_rc id_array element and
> the matching smmu id_array element be same.
> I can remove the assumption, will that be ok?
The only thing I care is that you don't have *any* assumption of how the 
IORT is designed.
> So,One ID Mapping element (Input_base, num_ids, out_base) can translate
> into two or more id_array entries of smmu node.
Which is basically solution 1) below... Anyway, I will wait the next 
version hoping that you will handle properly the IORT generation.
Cheers,

--
Julien Grall

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