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xen: Make VPMU init message look less scary

The default for the Xen hypervisor is to not enable VPMU in order to
avoid security issues. In this case the Linux kernel will issue the
message "Could not initialize VPMU for cpu 0, error -95" which looks
more like an error than a normal state.

Change the message to something less scary in case the hypervisor
returns EOPNOTSUPP or ENOSYS when trying to activate VPMU.

Signed-off-by: Juergen Gross <jgross@suse.com>
Signed-off-by: David Vrabel <david.vrabel@citrix.com>
This commit is contained in:
Juergen Gross 2016-08-02 09:22:12 +02:00 committed by David Vrabel
parent 5b00b504b1
commit 0252937a87

View File

@ -547,8 +547,11 @@ void xen_pmu_init(int cpu)
return;
fail:
pr_info_once("Could not initialize VPMU for cpu %d, error %d\n",
cpu, err);
if (err == -EOPNOTSUPP || err == -ENOSYS)
pr_info_once("VPMU disabled by hypervisor.\n");
else
pr_info_once("Could not initialize VPMU for cpu %d, error %d\n",
cpu, err);
free_pages((unsigned long)xenpmu_data, 0);
}