4.14-stable review patch. If anyone has any objections, please let me know.
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From: Joao Martins joao.m.martins@oracle.com
commit 001f60e1f662a6dee1630a2915401aaf5959d479 upstream.
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 Signed-off-by: Juergen Gross jgross@suse.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org
--- drivers/ptp/ptp_kvm.c | 3 +++ 1 file changed, 3 insertions(+)
--- a/drivers/ptp/ptp_kvm.c +++ b/drivers/ptp/ptp_kvm.c @@ -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();