After commit 8c058b0b9c34 ("x86/irq: Probe for PIC presence before
allocating descs for legacy IRQs") early_irq_init() will no longer
preallocate descriptors for legacy interrupts if PIT does not
exist.Therefore we need to allocate those descriptors for PV guests ourselves. Signed-off-by: Boris Ostrovsky <[email protected]> Suggested-by: Thomas Gleixner <[email protected]> --- drivers/xen/events/events_base.c | 8 ++++---- 1 file changed, 4 insertions(+), 4 deletions(-) diff --git a/drivers/xen/events/events_base.c b/drivers/xen/events/events_base.c index 849500e..a2bb333 100644 --- a/drivers/xen/events/events_base.c +++ b/drivers/xen/events/events_base.c @@ -419,8 +419,8 @@ static int __must_check xen_allocate_irq_gsi(unsigned gsi) if (xen_pv_domain() && !xen_initial_domain()) return xen_allocate_irq_dynamic(); - /* Legacy IRQ descriptors are already allocated by the arch. */ - if (gsi < NR_IRQS_LEGACY) + /* On HVM legacy IRQ descriptors are already allocated by the arch. */ + if (xen_hvm_domain() && gsi < NR_IRQS_LEGACY) irq = gsi; else irq = irq_alloc_desc_at(gsi, -1); @@ -445,8 +445,8 @@ static void xen_free_irq(unsigned irq) kfree(info); - /* Legacy IRQ descriptors are managed by the arch. */ - if (irq < NR_IRQS_LEGACY) + /* On HVM legacy IRQ descriptors are managed by the arch. */ + if (xen_hvm_domain() && irq < NR_IRQS_LEGACY) return; irq_free_desc(irq); -- 1.9.3 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
