Donate to e Foundation | Murena handsets with /e/OS | Own a part of Murena! Learn more

Commit fb78e58c authored by Konrad Rzeszutek Wilk's avatar Konrad Rzeszutek Wilk
Browse files

Revert "xen/spinlock: Disable IRQ spinlock (PV) allocation on PVHVM" 



This reverts commit 70dd4998.

Now that the bugs have been resolved we can re-enable the
PV ticketlock implementation under PVHVM Xen guests.

Signed-off-by: default avatarKonrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Reviewed-by: default avatarDavid Vrabel <david.vrabel@citrix.com>
parent 3310bbed

arch/x86/xen/spinlock.c

+0 −20
Original line number Diff line number Diff line
@@ -230,13 +230,6 @@ void xen_init_lock_cpu(int cpu) 
	WARN(per_cpu(lock_kicker_irq, cpu) >= 0, "spinlock on CPU%d exists on IRQ%d!\n",

	     cpu, per_cpu(lock_kicker_irq, cpu));



	/*

	 * See git commit f10cd522c5fbfec9ae3cc01967868c9c2401ed23

	 * (xen: disable PV spinlocks on HVM)

	 */

	if (xen_hvm_domain())

		return;



	name = kasprintf(GFP_KERNEL, "spinlock%d", cpu);

	irq = bind_ipi_to_irqhandler(XEN_SPIN_UNLOCK_VECTOR,

				     cpu,
@@ -256,13 +249,6 @@ void xen_init_lock_cpu(int cpu) 


void xen_uninit_lock_cpu(int cpu)

{

	/*

	 * See git commit f10cd522c5fbfec9ae3cc01967868c9c2401ed23

	 * (xen: disable PV spinlocks on HVM)

	 */

	if (xen_hvm_domain())

		return;



	if (!xen_pvspin)

		return;
@@ -275,12 +261,6 @@ void xen_uninit_lock_cpu(int cpu) 


void __init xen_init_spinlocks(void)

{

	/*

	 * See git commit f10cd522c5fbfec9ae3cc01967868c9c2401ed23

	 * (xen: disable PV spinlocks on HVM)

	 */

	if (xen_hvm_domain())

		return;



	if (!xen_pvspin) {

		printk(KERN_DEBUG "xen: PV spinlocks disabled\n");