From b1e46bc369bb490b721c77f15d2583bbf466152d Mon Sep 17 00:00:00 2001
From: Ian Jackson <ian.jackson@eu.citrix.com>
Date: Tue, 9 Mar 2021 15:00:47 +0000
Subject: [PATCH] SUPPORT.md: Document speculative attacks status of non-shim
 32-bit PV

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>
---
 SUPPORT.md | 11 ++++++++++-
 1 file changed, 10 insertions(+), 1 deletion(-)

diff --git a/SUPPORT.md b/SUPPORT.md
index 8a28a4c0e9..8e75b5afe9 100644
--- a/SUPPORT.md
+++ b/SUPPORT.md
@@ -73,7 +73,16 @@ 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
 
-- 
2.39.5