From ff4725265d5962711960930efdc586141c370b15 Mon Sep 17 00:00:00 2001 From: David Woodhouse Date: Thu, 24 Dec 2020 11:21:00 +0000 Subject: [PATCH] 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: David Woodhouse --- arch/x86/xen/enlighten_hvm.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/arch/x86/xen/enlighten_hvm.c b/arch/x86/xen/enlighten_hvm.c index a1c07e0c888e4..7a6ef517e81ac 100644 --- a/arch/x86/xen/enlighten_hvm.c +++ b/arch/x86/xen/enlighten_hvm.c @@ -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); -- 2.50.1