commit 105b47fdf2d0ed18d73cebb055f4cbc1c88a8b30
author Ankur Arora <ankur.a.arora@oracle.com> Tue Dec 06 11:14:07 2022 +0000
committer David Woodhouse <dwmw@amazon.co.uk> Wed Mar 01 08:22:50 2023 +0000
tree d12e25f84eb311e2537183abda74f5f992fd46b0
parent 3b06f29b2497da8362ee25b729a727cb8463fd62

i386/xen: implement HVMOP_set_evtchn_upcall_vector

The HVMOP_set_evtchn_upcall_vector hypercall sets the per-vCPU upcall
vector, to be delivered to the local APIC just like an MSI (with an EOI).

This takes precedence over the system-wide delivery method set by the
HVMOP_set_param hypercall with HVM_PARAM_CALLBACK_IRQ. It's used by
Windows and Xen (PV shim) guests but normally not by Linux.

Signed-off-by: Ankur Arora <ankur.a.arora@oracle.com>
Signed-off-by: Joao Martins <joao.m.martins@oracle.com>
[dwmw2: Rework for upstream kernel changes and split from HVMOP_set_param]
Signed-off-by: David Woodhouse <dwmw@amazon.co.uk>
Reviewed-by: Paul Durrant <paul@xen.org>