xen/mce: Add mcelog support for Xen platform

When MCA error occurs, it would be handled by Xen hypervisor first,
and then the error information would be sent to initial domain for logging.

This patch gets error information from Xen hypervisor and convert
Xen format error into Linux format mcelog. This logic is basically
self-contained, not touching other kernel components.

By using tools like mcelog tool users could read specific error information,
like what they did under native Linux.

To test follow directions outlined in Documentation/acpi/apei/einj.txt

Acked-and-tested-by: Borislav Petkov <borislav.petkov@amd.com>
Signed-off-by: Ke, Liping <liping.ke@intel.com>
Signed-off-by: Jiang, Yunhong <yunhong.jiang@intel.com>
Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
Signed-off-by: Liu, Jinsong <jinsong.liu@intel.com>
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>

1 files changed, 1 insertions, 0 deletions

diff --git a/include/linux/miscdevice.h b/include/linux/miscdevice.h
index 0549d2115507..e0deeb2cc939 100644
--- a/include/linux/miscdevice.h
+++ b/include/linux/miscdevice.h
@@ -35,6 +35,7 @@
 #define MPT_MINOR               220
 #define MPT2SAS_MINOR           221
 #define UINPUT_MINOR            223
+#define MISC_MCELOG_MINOR       227
 #define HPET_MINOR              228
 #define FUSE_MINOR              229
 #define KVM_MINOR               232