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authorNick Meier <nmeier@microsoft.com>2015-02-28 20:39:01 +0100
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2015-03-02 04:31:47 +0100
commit96c1d0581d00f7abe033350edb021a9d947d8d81 (patch)
treed39c7c394d2a3b0b677038062b6be4e7a7d0c7cd /drivers/hv/hyperv_vmbus.h
parentDrivers: hv: hv_balloon: refuse to balloon below the floor (diff)
downloadlinux-96c1d0581d00f7abe033350edb021a9d947d8d81.tar.xz
linux-96c1d0581d00f7abe033350edb021a9d947d8d81.zip
Drivers: hv: vmbus: Add support for VMBus panic notifier handler
Hyper-V allows a guest to notify the Hyper-V host that a panic condition occured. This notification can include up to five 64 bit values. These 64 bit values are written into crash MSRs. Once the data has been written into the crash MSRs, the host is then notified by writing into a Crash Control MSR. On the Hyper-V host, the panic notification data is captured in the Windows Event log as a 18590 event. Crash MSRs are defined in appendix H of the Hypervisor Top Level Functional Specification. At the time of this patch, v4.0 is the current functional spec. The URL for the v4.0 document is: http://download.microsoft.com/download/A/B/4/AB43A34E-BDD0-4FA6-BDEF-79EEF16E880B/Hypervisor Top Level Functional Specification v4.0.docx Signed-off-by: Nick Meier <nmeier@microsoft.com> Signed-off-by: K. Y. Srinivasan <kys@microsoft.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/hv/hyperv_vmbus.h')
-rw-r--r--drivers/hv/hyperv_vmbus.h11
1 files changed, 11 insertions, 0 deletions
diff --git a/drivers/hv/hyperv_vmbus.h b/drivers/hv/hyperv_vmbus.h
index b055e53bbc6e..88af4ec559c4 100644
--- a/drivers/hv/hyperv_vmbus.h
+++ b/drivers/hv/hyperv_vmbus.h
@@ -49,6 +49,17 @@ enum hv_cpuid_function {
HVCPUID_IMPLEMENTATION_LIMITS = 0x40000005,
};
+#define HV_FEATURE_GUEST_CRASH_MSR_AVAILABLE 0x400
+
+#define HV_X64_MSR_CRASH_P0 0x40000100
+#define HV_X64_MSR_CRASH_P1 0x40000101
+#define HV_X64_MSR_CRASH_P2 0x40000102
+#define HV_X64_MSR_CRASH_P3 0x40000103
+#define HV_X64_MSR_CRASH_P4 0x40000104
+#define HV_X64_MSR_CRASH_CTL 0x40000105
+
+#define HV_CRASH_CTL_CRASH_NOTIFY 0x8000000000000000
+
/* Define version of the synthetic interrupt controller. */
#define HV_SYNIC_VERSION (1)