XEN PV overrides smp_prepare_cpus(). xen_pv_smp_prepare_cpus() initializes interrupts in the XEN PV specific way and does not invoke native_smp_prepare_cpus(). As a consequence, x86_init.intr_mode_init() is not invoked either.
The invocation of x86_init.intr_mode_init() will be moved from native_smp_prepare_cpus() in a follow up patch to solve <INSERT REASON/PROBLEM>. That move would cause the invocation of x86_init.intr_mode_init() for XEN PV platforms. To prevent that, override the default x86_init. intr_mode_init() callback with a noop(). [Rewrited by Thomas Gleixner <t...@linutronix.de>] Signed-off-by: Dou Liyang <douly.f...@cn.fujitsu.com> Cc: xen-de...@lists.xenproject.org Cc: boris.ostrov...@oracle.com --- arch/x86/xen/enlighten_pv.c | 1 + 1 file changed, 1 insertion(+) diff --git a/arch/x86/xen/enlighten_pv.c b/arch/x86/xen/enlighten_pv.c index 811e4dd..07147dd 100644 --- a/arch/x86/xen/enlighten_pv.c +++ b/arch/x86/xen/enlighten_pv.c @@ -1250,6 +1250,7 @@ asmlinkage __visible void __init xen_start_kernel(void) x86_platform.get_nmi_reason = xen_get_nmi_reason; x86_init.resources.memory_setup = xen_memory_setup; + x86_init.irqs.intr_mode_init = x86_init_noop; x86_init.oem.arch_setup = xen_arch_setup; x86_init.oem.banner = xen_banner; -- 2.5.5 _______________________________________________ Xen-devel mailing list Xen-devel@lists.xen.org https://lists.xen.org/xen-devel