Re: [Xen-devel] HVMlite ABI specification DRAFT B + implementation outline

[Boris Ostrovsky <boris.ostrovsky@xxxxxxxxxx>]

On 02/10/2016 09:51 AM, Roger Pau Monné wrote:
> The detection of local APIC and IO APICs is quite isolated from each
> other, and the failure to find any IO APICs should not prevent local
> APICs from being enabled. Although I don't think there's any hardware
> with this setup, such configuration would be valid from an ACPI point of
> view. I've of course not tested this in any way, so those are only
> observations by a quick look at the code. I cannot speak about Linux.
I believe Linux should be able to handle this as well:
https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/tree/arch/x86/kernel/acpi/boot.c?id=refs/tags/v4.5-rc3#n1140

I also removed ioapic entries from hvmloader's ACPI builder and the 
(HVM) guest came up with no immediately visible issues.
-boris

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