1 files changed, 13 insertions, 4 deletions

diff --git a/arch/x86/kernel/vsmp_64.c b/arch/x86/kernel/vsmp_64.c
index f6584a90aba3..b99b9ad8540c 100644
--- a/arch/x86/kernel/vsmp_64.c
+++ b/arch/x86/kernel/vsmp_64.c
@@ -26,6 +26,9 @@
 
 #define TOPOLOGY_REGISTER_OFFSET 0x10
 
+/* Flag below is initialized once during vSMP PCI initialization. */
+static int irq_routing_comply = 1;
+
 #if defined CONFIG_PCI && defined CONFIG_PARAVIRT
 /*
  * Interrupt control on vSMPowered systems:
@@ -33,7 +36,7 @@
  * and vice versa.
  */
 
-asmlinkage unsigned long vsmp_save_fl(void)
+asmlinkage __visible unsigned long vsmp_save_fl(void)
 {
         unsigned long flags = native_save_fl();
 
@@ -53,7 +56,7 @@ __visible void vsmp_restore_fl(unsigned long flags)
 }
 PV_CALLEE_SAVE_REGS_THUNK(vsmp_restore_fl);
 
-asmlinkage void vsmp_irq_disable(void)
+asmlinkage __visible void vsmp_irq_disable(void)
 {
         unsigned long flags = native_save_fl();
 
@@ -61,7 +64,7 @@ asmlinkage void vsmp_irq_disable(void)
 }
 PV_CALLEE_SAVE_REGS_THUNK(vsmp_irq_disable);
 
-asmlinkage void vsmp_irq_enable(void)
+asmlinkage __visible void vsmp_irq_enable(void)
 {
         unsigned long flags = native_save_fl();
 
@@ -101,6 +104,10 @@ static void __init set_vsmp_pv_ops(void)
 #ifdef CONFIG_SMP
         if (cap & ctl & BIT(8)) {
                 ctl &= ~BIT(8);
+
+                /* Interrupt routing set to ignore */
+                irq_routing_comply = 0;
+
 #ifdef CONFIG_PROC_FS
                 /* Don't let users change irq affinity via procfs */
                 no_irq_affinity = 1;
@@ -218,7 +225,9 @@ static void vsmp_apic_post_init(void)
 {
         /* need to update phys_pkg_id */
         apic->phys_pkg_id = apicid_phys_pkg_id;
-        apic->vector_allocation_domain = fill_vector_allocation_domain;
+
+        if (!irq_routing_comply)
+                apic->vector_allocation_domain = fill_vector_allocation_domain;
 }
 
 void __init vsmp_init(void)