[PATCH v2] SUPPORT.md: Document guest PSCI support

[Mykola Kvach <xakep.amatop@xxxxxxxxx>]

From: Mykola Kvach <mykola_kvach@xxxxxxxx>

Add a new entry under "Virtual Hardware, Hypervisor" for guest PSCI
support on ARM. This documents support for all mandatory functions of
PSCI 1.1, and separately lists the supported optional functions.

Signed-off-by: Mykola Kvach <mykola_kvach@xxxxxxxx>
---
Changes in v2:
Addressed review comments from:
https://patchew.org/Xen/cover.1751020456.git.mykola._5Fkvach@xxxxxxxx/401d3745a295812fef14a22b0c2a3c6017d588c1.1751020456.git.mykola._5Fkvach@xxxxxxxx/#f891958a-35cf-4c6d-b1b9-51d34559f221@xxxxxxx
---
 SUPPORT.md | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/SUPPORT.md b/SUPPORT.md
index f0b5718e84..6a82a92189 100644
--- a/SUPPORT.md
+++ b/SUPPORT.md
@@ -956,6 +956,15 @@ by hwdom. Some platforms use SCMI for access to 
system-level resources.
 
     Status: Supported
 
+### ARM: Guest PSCI support
+
+Emulated PSCI interface exposed to guests. We support all mandatory
+functions of PSCI 1.1. See below for the list of optional PSCI call
+implemented and their status.
+
+   Status, Mandatory: Supported
+   Status, MIGRATE_INFO_TYPE: Supported
+
 ## Virtual Hardware, QEMU
 
 This section describes supported devices available in HVM mode using a
-- 
2.48.1