Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751867AbdINMjD (ORCPT ); Thu, 14 Sep 2017 08:39:03 -0400 Received: from mx2.suse.de ([195.135.220.15]:58096 "EHLO mx1.suse.de" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1751516AbdINMjC (ORCPT ); Thu, 14 Sep 2017 08:39:02 -0400 From: Juergen Gross To: linux-kernel@vger.kernel.org, xen-devel@lists.xenproject.org Cc: boris.ostrovsky@oracle.com, julien.grall@arm.com, tycho@docker.com, Juergen Gross Subject: [PATCH] xen: don't compile pv-specific parts if XEN_PV isn't configured Date: Thu, 14 Sep 2017 14:38:58 +0200 Message-Id: <20170914123858.1167-1-jgross@suse.com> X-Mailer: git-send-email 2.12.3 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 4498 Lines: 182 xenbus_client.c contains some functions specific for pv guests. Enclose them with #ifdef CONFIG_XEN_PV to avoid compiling them when they are not needed (e.g. on ARM). Signed-off-by: Juergen Gross --- drivers/xen/xenbus/xenbus_client.c | 130 +++++++++++++++++++------------------ 1 file changed, 67 insertions(+), 63 deletions(-) diff --git a/drivers/xen/xenbus/xenbus_client.c b/drivers/xen/xenbus/xenbus_client.c index 82a8866758ee..a1c17000129b 100644 --- a/drivers/xen/xenbus/xenbus_client.c +++ b/drivers/xen/xenbus/xenbus_client.c @@ -519,64 +519,6 @@ static int __xenbus_map_ring(struct xenbus_device *dev, return err; } -static int xenbus_map_ring_valloc_pv(struct xenbus_device *dev, - grant_ref_t *gnt_refs, - unsigned int nr_grefs, - void **vaddr) -{ - struct xenbus_map_node *node; - struct vm_struct *area; - pte_t *ptes[XENBUS_MAX_RING_GRANTS]; - phys_addr_t phys_addrs[XENBUS_MAX_RING_GRANTS]; - int err = GNTST_okay; - int i; - bool leaked; - - *vaddr = NULL; - - if (nr_grefs > XENBUS_MAX_RING_GRANTS) - return -EINVAL; - - node = kzalloc(sizeof(*node), GFP_KERNEL); - if (!node) - return -ENOMEM; - - area = alloc_vm_area(XEN_PAGE_SIZE * nr_grefs, ptes); - if (!area) { - kfree(node); - return -ENOMEM; - } - - for (i = 0; i < nr_grefs; i++) - phys_addrs[i] = arbitrary_virt_to_machine(ptes[i]).maddr; - - err = __xenbus_map_ring(dev, gnt_refs, nr_grefs, node->handles, - phys_addrs, - GNTMAP_host_map | GNTMAP_contains_pte, - &leaked); - if (err) - goto failed; - - node->nr_handles = nr_grefs; - node->pv.area = area; - - spin_lock(&xenbus_valloc_lock); - list_add(&node->next, &xenbus_valloc_pages); - spin_unlock(&xenbus_valloc_lock); - - *vaddr = area->addr; - return 0; - -failed: - if (!leaked) - free_vm_area(area); - else - pr_alert("leaking VM area %p size %u page(s)", area, nr_grefs); - - kfree(node); - return err; -} - struct map_ring_valloc_hvm { unsigned int idx; @@ -725,6 +667,65 @@ int xenbus_unmap_ring_vfree(struct xenbus_device *dev, void *vaddr) } EXPORT_SYMBOL_GPL(xenbus_unmap_ring_vfree); +#ifdef CONFIG_XEN_PV +static int xenbus_map_ring_valloc_pv(struct xenbus_device *dev, + grant_ref_t *gnt_refs, + unsigned int nr_grefs, + void **vaddr) +{ + struct xenbus_map_node *node; + struct vm_struct *area; + pte_t *ptes[XENBUS_MAX_RING_GRANTS]; + phys_addr_t phys_addrs[XENBUS_MAX_RING_GRANTS]; + int err = GNTST_okay; + int i; + bool leaked; + + *vaddr = NULL; + + if (nr_grefs > XENBUS_MAX_RING_GRANTS) + return -EINVAL; + + node = kzalloc(sizeof(*node), GFP_KERNEL); + if (!node) + return -ENOMEM; + + area = alloc_vm_area(XEN_PAGE_SIZE * nr_grefs, ptes); + if (!area) { + kfree(node); + return -ENOMEM; + } + + for (i = 0; i < nr_grefs; i++) + phys_addrs[i] = arbitrary_virt_to_machine(ptes[i]).maddr; + + err = __xenbus_map_ring(dev, gnt_refs, nr_grefs, node->handles, + phys_addrs, + GNTMAP_host_map | GNTMAP_contains_pte, + &leaked); + if (err) + goto failed; + + node->nr_handles = nr_grefs; + node->pv.area = area; + + spin_lock(&xenbus_valloc_lock); + list_add(&node->next, &xenbus_valloc_pages); + spin_unlock(&xenbus_valloc_lock); + + *vaddr = area->addr; + return 0; + +failed: + if (!leaked) + free_vm_area(area); + else + pr_alert("leaking VM area %p size %u page(s)", area, nr_grefs); + + kfree(node); + return err; +} + static int xenbus_unmap_ring_vfree_pv(struct xenbus_device *dev, void *vaddr) { struct xenbus_map_node *node; @@ -788,6 +789,12 @@ static int xenbus_unmap_ring_vfree_pv(struct xenbus_device *dev, void *vaddr) return err; } +static const struct xenbus_ring_ops ring_ops_pv = { + .map = xenbus_map_ring_valloc_pv, + .unmap = xenbus_unmap_ring_vfree_pv, +}; +#endif + struct unmap_ring_vfree_hvm { unsigned int idx; @@ -916,11 +923,6 @@ enum xenbus_state xenbus_read_driver_state(const char *path) } EXPORT_SYMBOL_GPL(xenbus_read_driver_state); -static const struct xenbus_ring_ops ring_ops_pv = { - .map = xenbus_map_ring_valloc_pv, - .unmap = xenbus_unmap_ring_vfree_pv, -}; - static const struct xenbus_ring_ops ring_ops_hvm = { .map = xenbus_map_ring_valloc_hvm, .unmap = xenbus_unmap_ring_vfree_hvm, @@ -928,8 +930,10 @@ static const struct xenbus_ring_ops ring_ops_hvm = { void __init xenbus_ring_ops_init(void) { +#ifdef CONFIG_XEN_PV if (!xen_feature(XENFEAT_auto_translated_physmap)) ring_ops = &ring_ops_pv; else +#endif ring_ops = &ring_ops_hvm; } -- 2.12.3