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Diffstat (limited to 'arch/x86/kernel/vsmp_64.c')
-rw-r--r--arch/x86/kernel/vsmp_64.c17
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)