Commit 4621dc6a authored by David Woodhouse's avatar David Woodhouse Committed by Juergen Gross
Browse files

x86/xen: Don't register Xen IPIs when they aren't going to be used 



In the case where xen_have_vector_callback is false, we still register
the IPI vectors in xen_smp_intr_init() for the secondary CPUs even
though they aren't going to be used. Stop doing that.

Signed-off-by: default avatarDavid Woodhouse <dwmw@amazon.co.uk>
Reviewed-by: default avatarBoris Ostrovsky <boris.ostrovsky@oracle.com>
Link: https://lore.kernel.org/r/20210106153958.584169-5-dwmw2@infradead.org


Signed-off-by: default avatarJuergen Gross <jgross@suse.com>
parent b36b0fe9

arch/x86/xen/enlighten_hvm.c

+2 −2
Original line number Diff line number Diff line
@@ -164,10 +164,10 @@ static int xen_cpu_up_prepare_hvm(unsigned int cpu) 
	else

		per_cpu(xen_vcpu_id, cpu) = cpu;

	rc = xen_vcpu_setup(cpu);

	if (rc)

	if (rc || !xen_have_vector_callback)

		return rc;



	if (xen_have_vector_callback && xen_feature(XENFEAT_hvm_safe_pvclock))

	if (xen_feature(XENFEAT_hvm_safe_pvclock))

		xen_setup_timer(cpu);



	rc = xen_smp_intr_init(cpu);