Re: [Xen-devel] [PATCH v2] AMD IOMMU: Support IOAPIC IDs larger than 128

["Jan Beulich" <JBeulich@xxxxxxxx>]

>>> On 05.12.16 at 20:36, <suravee.suthikulpanit@xxxxxxx> wrote:
> Currently, the driver uses the APIC ID to index into the ioapic_sbdf array.
> The current MAX_IO_APICS is 128, which causes the driver initialization
> to fail on the system with IOAPIC ID >= 128.
> 
> Instead, this patch adds APIC ID in the struct ioapic_sbdf,
> which is used to match the entry when searching through the array.
> 
> Also, this patch removes the use of ioapic_cmdline bit-map, which is
> used to track the ivrs_ioapic options via command line.
> Instead, it introduces the cmdline flag in the struct ioapic_sbdf,
> to identify if the entry is created during ivrs_ioapic command-line parsing.
> 
> Signed-off-by: Suravee Suthikulpanit <suravee.suthikulpanit@xxxxxxx>

I've committed this; to assess backporting needs - do you have
an estimate when systems needing this may start to appear?

Jan


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