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Drivers: hv: vmbus: Make panic reporting to be more useful

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Hyper-V allows the guest to report panic and the guest can pass additional
information. All this is logged on the host. Currently Linux is passing back
information that is not particularly useful. Make the following changes:

1. Windows uses crash MSR P0 to report bugcheck code. Follow the same
convention for Linux as well.
2. It will be useful to know the gust ID of the Linux guest that has
paniced. Pass back this information.

These changes will help in better supporting Linux on Hyper-V

Signed-off-by: K. Y. Srinivasan <kys@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
K. Y. Srinivasan
2017-10-29 11:33:41 -07:00
committed by Greg Kroah-Hartman
parent 6981fbf378
commit 7ed4325a44
3 changed files with 12 additions and 9 deletions
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drivers/hv/vmbus_drv.c
+2 -2
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@@ -65,7 +65,7 @@ static int hyperv_panic_event(struct notifier_block *nb, unsigned long val,
regs = current_pt_regs();
hyperv_report_panic(regs);
hyperv_report_panic(regs, val);
return NOTIFY_DONE;
}
@@ -75,7 +75,7 @@ static int hyperv_die_event(struct notifier_block *nb, unsigned long val,
struct die_args *die = (struct die_args *)args;
struct pt_regs *regs = die->regs;
hyperv_report_panic(regs);
hyperv_report_panic(regs, val);
return NOTIFY_DONE;
}