Merge tag 'for-linus-5.9-rc3-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/xen/tip

Pull xen fixes from Juergen Gross:
 "Two fixes for Xen: one needed for ongoing work to support virtio with
  Xen, and one for a corner case in IRQ handling with Xen"

* tag 'for-linus-5.9-rc3-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/xen/tip:
  arm/xen: Add misuse warning to virt_to_gfn
  xen/xenbus: Fix granting of vmalloc'd memory
  XEN uses irqdesc::irq_data_common::handler_data to store a per interrupt XEN data pointer which contains XEN specific information.

3 files changed, 21 insertions, 11 deletions

diff --git a/drivers/xen/events/events_base.c b/drivers/xen/events/events_base.c
index 140c7bf33a9899..90b8f56fbadb1a 100644
--- a/drivers/xen/events/events_base.c
+++ b/drivers/xen/events/events_base.c
@@ -156,7 +156,7 @@ int get_evtchn_to_irq(evtchn_port_t evtchn)
 /* Get info for IRQ */
 struct irq_info *info_for_irq(unsigned irq)
 {
-	return irq_get_handler_data(irq);
+	return irq_get_chip_data(irq);
 }
 
 /* Constructors for packed IRQ information. */
@@ -377,7 +377,7 @@ static void xen_irq_init(unsigned irq)
 	info->type = IRQT_UNBOUND;
 	info->refcnt = -1;
 
-	irq_set_handler_data(irq, info);
+	irq_set_chip_data(irq, info);
 
 	list_add_tail(&info->list, &xen_irq_list_head);
 }
@@ -426,14 +426,14 @@ static int __must_check xen_allocate_irq_gsi(unsigned gsi)
 
 static void xen_free_irq(unsigned irq)
 {
-	struct irq_info *info = irq_get_handler_data(irq);
+	struct irq_info *info = irq_get_chip_data(irq);
 
 	if (WARN_ON(!info))
 		return;
 
 	list_del(&info->list);
 
-	irq_set_handler_data(irq, NULL);
+	irq_set_chip_data(irq, NULL);
 
 	WARN_ON(info->refcnt > 0);
 
@@ -603,7 +603,7 @@ EXPORT_SYMBOL_GPL(xen_irq_from_gsi);
 static void __unbind_from_irq(unsigned int irq)
 {
 	evtchn_port_t evtchn = evtchn_from_irq(irq);
-	struct irq_info *info = irq_get_handler_data(irq);
+	struct irq_info *info = irq_get_chip_data(irq);
 
 	if (info->refcnt > 0) {
 		info->refcnt--;
@@ -1108,7 +1108,7 @@ int bind_ipi_to_irqhandler(enum ipi_vector ipi,
 
 void unbind_from_irqhandler(unsigned int irq, void *dev_id)
 {
-	struct irq_info *info = irq_get_handler_data(irq);
+	struct irq_info *info = irq_get_chip_data(irq);
 
 	if (WARN_ON(!info))
 		return;
@@ -1142,7 +1142,7 @@ int evtchn_make_refcounted(evtchn_port_t evtchn)
 	if (irq == -1)
 		return -ENOENT;
 
-	info = irq_get_handler_data(irq);
+	info = irq_get_chip_data(irq);
 
 	if (!info)
 		return -ENOENT;
@@ -1170,7 +1170,7 @@ int evtchn_get(evtchn_port_t evtchn)
 	if (irq == -1)
 		goto done;
 
-	info = irq_get_handler_data(irq);
+	info = irq_get_chip_data(irq);
 
 	if (!info)
 		goto done;
diff --git a/drivers/xen/xenbus/xenbus_client.c b/drivers/xen/xenbus/xenbus_client.c
index 786fbb7d8be063..907bcbb93afbf2 100644
--- a/drivers/xen/xenbus/xenbus_client.c
+++ b/drivers/xen/xenbus/xenbus_client.c
@@ -379,8 +379,14 @@ int xenbus_grant_ring(struct xenbus_device *dev, void *vaddr,
 	int i, j;
 
 	for (i = 0; i < nr_pages; i++) {
-		err = gnttab_grant_foreign_access(dev->otherend_id,
-						  virt_to_gfn(vaddr), 0);
+		unsigned long gfn;
+
+		if (is_vmalloc_addr(vaddr))
+			gfn = pfn_to_gfn(vmalloc_to_pfn(vaddr));
+		else
+			gfn = virt_to_gfn(vaddr);
+
+		err = gnttab_grant_foreign_access(dev->otherend_id, gfn, 0);
 		if (err < 0) {
 			xenbus_dev_fatal(dev, err,
 					 "granting access to ring page");
diff --git a/include/xen/arm/page.h b/include/xen/arm/page.h
index d7f6af50e200bf..39df751d0dc43b 100644
--- a/include/xen/arm/page.h
+++ b/include/xen/arm/page.h
@@ -76,7 +76,11 @@ static inline unsigned long bfn_to_pfn(unsigned long bfn)
 #define bfn_to_local_pfn(bfn)	bfn_to_pfn(bfn)
 
 /* VIRT <-> GUEST conversion */
-#define virt_to_gfn(v)		(pfn_to_gfn(virt_to_phys(v) >> XEN_PAGE_SHIFT))
+#define virt_to_gfn(v)                                                         \
+	({                                                                     \
+		WARN_ON_ONCE(!virt_addr_valid(v));                              \
+		pfn_to_gfn(virt_to_phys(v) >> XEN_PAGE_SHIFT);                 \
+	})
 #define gfn_to_virt(m)		(__va(gfn_to_pfn(m) << XEN_PAGE_SHIFT))
 
 /* Only used in PV code. But ARM guests are always HVM. */