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xen: Fixes for rc2 

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Merge tag 'for-linus-4.14b-rc2-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/xen/tip

Pull xen fixes from Juergen Gross:
 "A fix for a missing __init annotation and two cleanup patches"

* tag 'for-linus-4.14b-rc2-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/xen/tip:
  xen, arm64: drop dummy lookup_address()
  xen: don't compile pv-specific parts if XEN_PV isn't configured
  xen: x86: mark xen_find_pt_base as __init
zero-colors
Linus Torvalds 2017-09-22 06:40:47 -10:00
parent d6396a7331 0555ac4333
commit 0a8abd97dc
3 changed files with 68 additions and 74 deletions
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2
arch/x86/xen/mmu_pv.c
View File

@ -2220,7 +2220,7 @@ static void __init xen_write_cr3_init(unsigned long cr3)
* not the first page table in the page table pool.
* Iterate through the initial page tables to find the real page table base.
*/
static phys_addr_t xen_find_pt_base(pmd_t *pmd)
static phys_addr_t __init xen_find_pt_base(pmd_t *pmd)
{
phys_addr_t pt_base, paddr;
unsigned pmdidx;

130
drivers/xen/xenbus/xenbus_client.c
View File

@ -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;
}

10
include/xen/arm/page.h
View File

@ -84,16 +84,6 @@ static inline xmaddr_t arbitrary_virt_to_machine(void *vaddr)
BUG();
}
/* TODO: this shouldn't be here but it is because the frontend drivers
* are using it (its rolled in headers) even though we won't hit the code path.
* So for right now just punt with this.
*/
static inline pte_t *lookup_address(unsigned long address, unsigned int *level)
{
BUG();
return NULL;
}
extern int set_foreign_p2m_mapping(struct gnttab_map_grant_ref *map_ops,
struct gnttab_map_grant_ref *kmap_ops,
struct page **pages, unsigned int count);