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

[Paul Durrant <pdurrant@xxxxxxxxxx>]

...for patches not (yet) upstream.

This patch is simply reserving 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>
---
Cc: Jan Beulich <jbeulich@xxxxxxxx>
Cc: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
Cc: Wei Liu <wl@xxxxxxx>
Cc: "Roger Pau Monné" <roger.pau@xxxxxxxxxx>
---
 xen/include/public/arch-x86/hvm/save.h | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/xen/include/public/arch-x86/hvm/save.h 
b/xen/include/public/arch-x86/hvm/save.h
index b2ad3fcd74..9c7b86678e 100644
--- a/xen/include/public/arch-x86/hvm/save.h
+++ b/xen/include/public/arch-x86/hvm/save.h
@@ -639,10 +639,12 @@ struct hvm_msr {
 
 #define CPU_MSR_CODE  20
 
+/* Range 22 - 40 reserved for Amazon */
+
 /*
  * Largest type-code in use
  */
-#define HVM_SAVE_CODE_MAX 20
+#define HVM_SAVE_CODE_MAX 40
 
 #endif /* __XEN_PUBLIC_HVM_SAVE_X86_H__ */
 
-- 
2.20.1


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