Commit 001f60e1 authored Nov 08, 2017 by Joao Martins Committed by Boris Ostrovsky Nov 08, 2017

ptp_kvm: probe for kvm guest availability



In the event of moving pvclock_pvti_cpu0_va() definition to common
pvclock code, this function would return a value on non KVM guests.
Later on this would fail with a GPF on ptp_kvm_init when running on a
Xen guest. Therefore, ptp_kvm_init() should check whether it is running
in a KVM guest.

Signed-off-by: Joao Martins <joao.m.martins@oracle.com>
Acked-by: Radim Krčmář <rkrcmar@redhat.com>
Signed-off-by: Boris Ostrovsky <boris.ostrovsky@oracle.com>

parent 52847bb7

drivers/ptp/ptp_kvm.c

+3 −0

Original line number	Diff line number	Diff line
		@@ -178,6 +178,9 @@ static int __init ptp_kvm_init(void)
		{
		long ret;

		if (!kvm_para_available())
		return -ENODEV;

		clock_pair_gpa = slow_virt_to_phys(&clock_pair);
		hv_clock = pvclock_pvti_cpu0_va();

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