File xsa370.patch of Package xen.26343

Subject: SUPPORT.md: Document speculative attacks status of non-shim 32-bit PV
From: Ian Jackson ian.jackson@eu.citrix.com Tue Mar 9 15:00:47 2021 +0000
Date: Tue May 4 14:59:44 2021 +0200:
Git: 5984905b2638df87a0262d1ee91f0a6e14a86df6

This documents, but does not fix, XSA-370.

Reported-by: Jann Horn <jannh@google.com>
Signed-off-by: Ian Jackson <ian.jackson@eu.citrix.com>
Signed-off-by: George Dunlap <george.dunlap@citrix.com>
Acked-by: Jan Beulich <jbeulich@suse.com>

diff --git a/SUPPORT.md b/SUPPORT.md
index 79ebd51fb8..19f85cadf6 100644
--- a/SUPPORT.md
+++ b/SUPPORT.md
@@ -79,7 +79,16 @@ Traditional Xen PV guest
 
 No hardware requirements
 
-    Status: Supported
+    Status, x86_64: Supported
+    Status, x86_32, shim: Supported
+    Status, x86_32, without shim: Supported, with caveats
+
+Due to architectural limitations,
+32-bit PV guests must be assumed to be able to read arbitrary host memory
+using speculative execution attacks.
+Advisories will continue to be issued
+for new vulnerabilities related to un-shimmed 32-bit PV guests
+enabling denial-of-service attacks or privilege escalation attacks.
 
 ### x86/HVM