From: Ian Jackson <ian.jackson@eu.citrix.com>
Date: Tue, 9 Mar 2021 15:00:47 +0000 (+0000)
Subject: SUPPORT.md: Document speculative attacks status of non-shim 32-bit PV
X-Git-Tag: archive/raspbian/4.14.2+25-gb6a8c4f72d-2+rpi1^2~47^2~24
X-Git-Url: https://dgit.raspbian.org/?a=commitdiff_plain;h=10f0b2d49376865d49680f06c52b451fabce3bb5;p=xen.git

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>
---

diff --git a/SUPPORT.md b/SUPPORT.md
index 12e77ab66b..cd786ac0c1 100644
--- a/SUPPORT.md
+++ b/SUPPORT.md
@@ -80,7 +80,16 @@ 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