Re: [PATCH v4 17/17] x86/hyperv: handle IO-APIC when running as root

[Wei Liu]

On Wed, Jan 06, 2021 at 08:33:50PM +0000, Wei Liu wrote:
> Just like MSI/MSI-X, IO-APIC interrupts are remapped by Microsoft
> Hypervisor when Linux runs as the root partition. Implement an IRQ chip
> to handle mapping and unmapping of IO-APIC interrupts.
> 
> Use custom functions for mapping and unmapping ACPI GSIs. They will
> issue Microsoft Hypervisor specific hypercalls on top of the native
> routines.
> 

This patch is superseded by a new patch I recently wrote.

The new approach is to implement a parent IRQ remapping domain for the
IO-APIC domain in Linux. It fits cleanly into Linux's architecture. No
more horrendous hooking required! :-)

Please review the following patch instead.

CC IOMMU maintainer. FYI.

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