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Paul Durrant 9c4555801f x86/viridian: implement the crash MSRs
Section 2.4.4 of the Hypervisor Top Level Functional Specification states
that enabling bit 10 in EDX of CPUID leaf 3 advertises to Windows a set
of MSRs into which it can write crash information.

This patch advertises that bit and implements the MSRs such that Xen can
log the information if a Windows guest crashes.

Signed-off-by: Paul Durrant <paul.durrant@citrix.com>
Reviewed-by: Jan Beulich <jbeulich@suse.com>
Reviewed-by: Wei Liu <wei.liu2@citrix.com>
2017-03-23 15:52:08 +01:00
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