[Xen-devel] [PATCH v3] x86/save: reserve HVM save record numbers that have been consumed...

[Paul Durrant <pdurrant@xxxxxxxxxx>]

...for patches not (yet) upstream.

This patch is simply adding a comment to reserve save record number space
to avoid the risk of clashes between existent downstream changes made by
Amazon and future upstream changes which may be incompatible.

Signed-off-by: Paul Durrant <pdurrant@xxxxxxxxxx>
Reviewed-by: Wei Liu <wl@xxxxxxx>
---
Cc: Jan Beulich <jbeulich@xxxxxxxx>
Cc: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
Cc: "Roger Pau Monné" <roger.pau@xxxxxxxxxx>

v3:
 - Reduced range and clarified inclusivity

v2:
 - Reduce patch to just a comment
---
 xen/include/public/arch-x86/hvm/save.h | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/xen/include/public/arch-x86/hvm/save.h 
b/xen/include/public/arch-x86/hvm/save.h
index b2ad3fcd74..468c28dedb 100644
--- a/xen/include/public/arch-x86/hvm/save.h
+++ b/xen/include/public/arch-x86/hvm/save.h
@@ -639,6 +639,8 @@ struct hvm_msr {
 
 #define CPU_MSR_CODE  20
 
+/* Range 22 - 34 (inclusive) reserved for Amazon */
+
 /*
  * Largest type-code in use
  */
-- 
2.20.1


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