Commit abbe0d3c authored by Linus Torvalds's avatar Linus Torvalds
Browse files

Merge branch 'stable/bug.fixes' of git://oss.oracle.com/git/kwilk/xen 

* 'stable/bug.fixes' of git://oss.oracle.com/git/kwilk/xen:
  xen/i386: follow-up to "replace order-based range checking of M2P table by linear one"
  xen/irq: Alter the locking to use a mutex instead of a spinlock.
  xen/e820: if there is no dom0_mem=, don't tweak extra_pages.
  xen: disable PV spinlocks on HVM
parents c455ea4f 61cca2fa

arch/x86/xen/mmu.c

+2 −4
Original line number Diff line number Diff line
@@ -1721,10 +1721,8 @@ void __init xen_setup_machphys_mapping(void) 
		machine_to_phys_nr = MACH2PHYS_NR_ENTRIES;

	}

#ifdef CONFIG_X86_32

	if ((machine_to_phys_mapping + machine_to_phys_nr)

	    < machine_to_phys_mapping)

		machine_to_phys_nr = (unsigned long *)NULL

				     - machine_to_phys_mapping;

	WARN_ON((machine_to_phys_mapping + (machine_to_phys_nr - 1))

		< machine_to_phys_mapping);

#endif

}

arch/x86/xen/setup.c

+6 −4
Original line number Diff line number Diff line
@@ -306,10 +306,12 @@ char * __init xen_memory_setup(void) 
	sanitize_e820_map(e820.map, ARRAY_SIZE(e820.map), &e820.nr_map);



	extra_limit = xen_get_max_pages();

	if (extra_limit >= max_pfn)

	if (max_pfn + extra_pages > extra_limit) {

		if (extra_limit > max_pfn)

			extra_pages = extra_limit - max_pfn;

		else

			extra_pages = 0;

	}



	extra_pages += xen_return_unused_memory(xen_start_info->nr_pages, &e820);

arch/x86/xen/smp.c

+0 −1
Original line number Diff line number Diff line
@@ -532,7 +532,6 @@ static void __init xen_hvm_smp_prepare_cpus(unsigned int max_cpus) 
	WARN_ON(xen_smp_intr_init(0));



	xen_init_lock_cpu(0);

	xen_init_spinlocks();

}



static int __cpuinit xen_hvm_cpu_up(unsigned int cpu)

drivers/xen/events.c

+20 −20
Original line number Diff line number Diff line
@@ -54,7 +54,7 @@ 
 * This lock protects updates to the following mapping and reference-count

 * arrays. The lock does not need to be acquired to read the mapping tables.

 */

static DEFINE_SPINLOCK(irq_mapping_update_lock);

static DEFINE_MUTEX(irq_mapping_update_lock);



static LIST_HEAD(xen_irq_list_head);
@@ -631,7 +631,7 @@ int xen_bind_pirq_gsi_to_irq(unsigned gsi, 
	int irq = -1;

	struct physdev_irq irq_op;



	spin_lock(&irq_mapping_update_lock);

	mutex_lock(&irq_mapping_update_lock);



	irq = find_irq_by_gsi(gsi);

	if (irq != -1) {
@@ -684,7 +684,7 @@ int xen_bind_pirq_gsi_to_irq(unsigned gsi, 
				handle_edge_irq, name);



out:

	spin_unlock(&irq_mapping_update_lock);

	mutex_unlock(&irq_mapping_update_lock);



	return irq;

}
@@ -710,7 +710,7 @@ int xen_bind_pirq_msi_to_irq(struct pci_dev *dev, struct msi_desc *msidesc, 
{

	int irq, ret;



	spin_lock(&irq_mapping_update_lock);

	mutex_lock(&irq_mapping_update_lock);



	irq = xen_allocate_irq_dynamic();

	if (irq == -1)
@@ -724,10 +724,10 @@ int xen_bind_pirq_msi_to_irq(struct pci_dev *dev, struct msi_desc *msidesc, 
	if (ret < 0)

		goto error_irq;

out:

	spin_unlock(&irq_mapping_update_lock);

	mutex_unlock(&irq_mapping_update_lock);

	return irq;

error_irq:

	spin_unlock(&irq_mapping_update_lock);

	mutex_unlock(&irq_mapping_update_lock);

	xen_free_irq(irq);

	return -1;

}
@@ -740,7 +740,7 @@ int xen_destroy_irq(int irq) 
	struct irq_info *info = info_for_irq(irq);

	int rc = -ENOENT;



	spin_lock(&irq_mapping_update_lock);

	mutex_lock(&irq_mapping_update_lock);



	desc = irq_to_desc(irq);

	if (!desc)
@@ -766,7 +766,7 @@ int xen_destroy_irq(int irq) 
	xen_free_irq(irq);



out:

	spin_unlock(&irq_mapping_update_lock);

	mutex_unlock(&irq_mapping_update_lock);

	return rc;

}
@@ -776,7 +776,7 @@ int xen_irq_from_pirq(unsigned pirq) 


	struct irq_info *info;



	spin_lock(&irq_mapping_update_lock);

	mutex_lock(&irq_mapping_update_lock);



	list_for_each_entry(info, &xen_irq_list_head, list) {

		if (info == NULL || info->type != IRQT_PIRQ)
@@ -787,7 +787,7 @@ int xen_irq_from_pirq(unsigned pirq) 
	}

	irq = -1;

out:

	spin_unlock(&irq_mapping_update_lock);

	mutex_unlock(&irq_mapping_update_lock);



	return irq;

}
@@ -802,7 +802,7 @@ int bind_evtchn_to_irq(unsigned int evtchn) 
{

	int irq;



	spin_lock(&irq_mapping_update_lock);

	mutex_lock(&irq_mapping_update_lock);



	irq = evtchn_to_irq[evtchn];
@@ -818,7 +818,7 @@ int bind_evtchn_to_irq(unsigned int evtchn) 
	}



out:

	spin_unlock(&irq_mapping_update_lock);

	mutex_unlock(&irq_mapping_update_lock);



	return irq;

}
@@ -829,7 +829,7 @@ static int bind_ipi_to_irq(unsigned int ipi, unsigned int cpu) 
	struct evtchn_bind_ipi bind_ipi;

	int evtchn, irq;



	spin_lock(&irq_mapping_update_lock);

	mutex_lock(&irq_mapping_update_lock);



	irq = per_cpu(ipi_to_irq, cpu)[ipi];
@@ -853,7 +853,7 @@ static int bind_ipi_to_irq(unsigned int ipi, unsigned int cpu) 
	}



 out:

	spin_unlock(&irq_mapping_update_lock);

	mutex_unlock(&irq_mapping_update_lock);

	return irq;

}
@@ -878,7 +878,7 @@ int bind_virq_to_irq(unsigned int virq, unsigned int cpu) 
	struct evtchn_bind_virq bind_virq;

	int evtchn, irq;



	spin_lock(&irq_mapping_update_lock);

	mutex_lock(&irq_mapping_update_lock);



	irq = per_cpu(virq_to_irq, cpu)[virq];
@@ -903,7 +903,7 @@ int bind_virq_to_irq(unsigned int virq, unsigned int cpu) 
	}



out:

	spin_unlock(&irq_mapping_update_lock);

	mutex_unlock(&irq_mapping_update_lock);



	return irq;

}
@@ -913,7 +913,7 @@ static void unbind_from_irq(unsigned int irq) 
	struct evtchn_close close;

	int evtchn = evtchn_from_irq(irq);



	spin_lock(&irq_mapping_update_lock);

	mutex_lock(&irq_mapping_update_lock);



	if (VALID_EVTCHN(evtchn)) {

		close.port = evtchn;
@@ -943,7 +943,7 @@ static void unbind_from_irq(unsigned int irq) 


	xen_free_irq(irq);



	spin_unlock(&irq_mapping_update_lock);

	mutex_unlock(&irq_mapping_update_lock);

}



int bind_evtchn_to_irqhandler(unsigned int evtchn,
@@ -1279,7 +1279,7 @@ void rebind_evtchn_irq(int evtchn, int irq) 
	   will also be masked. */

	disable_irq(irq);



	spin_lock(&irq_mapping_update_lock);

	mutex_lock(&irq_mapping_update_lock);



	/* After resume the irq<->evtchn mappings are all cleared out */

	BUG_ON(evtchn_to_irq[evtchn] != -1);
@@ -1289,7 +1289,7 @@ void rebind_evtchn_irq(int evtchn, int irq) 


	xen_irq_info_evtchn_init(irq, evtchn);



	spin_unlock(&irq_mapping_update_lock);

	mutex_unlock(&irq_mapping_update_lock);



	/* new event channels are always bound to cpu 0 */

	irq_set_affinity(irq, cpumask_of(0));

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