From: Edwin Török <edvin.to...@citrix.com>

To more easily lookup the semantics of these MSRs add references to
vendor manuals.

Signed-off-by: Edwin Török <edvin.to...@citrix.com>
---
 xen/arch/x86/include/asm/msr-index.h | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/xen/arch/x86/include/asm/msr-index.h 
b/xen/arch/x86/include/asm/msr-index.h
index 2853a276ca..8601f8f426 100644
--- a/xen/arch/x86/include/asm/msr-index.h
+++ b/xen/arch/x86/include/asm/msr-index.h
@@ -13,6 +13,16 @@
  * Blocks of related constants should be sorted by MSR index.  The constant
  * names should be as concise as possible, and the bit names may have an
  * abbreviated name.  Exceptions will be considered on a case-by-case basis.
+ *
+ * References:
+ * - 
https://software.intel.com/content/www/us/en/develop/articles/intel-sdm.html
+ *    Intel(R) 64 and IA-32 architectures SDM volume 4: Model-specific 
registers
+ *    Chapter 2, "Model-Specific Registers (MSRs)"
+ *
+ * - https://developer.amd.com/resources/developer-guides-manuals/
+ *    AMD64 Architecture Programmer’s Manual Volume 2: System Programming
+ *    Appendix A "MSR Cross-Reference"
+ *
  */
 
 #define MSR_P5_MC_ADDR                      0
-- 
2.41.0


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