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Merge branch 'stable/for-linus-fixes-3.2' of git://git.kernel.org/pub/scm/linux/kernel/git/konrad/xen

Browse Source 
* 'stable/for-linus-fixes-3.2' of git://git.kernel.org/pub/scm/linux/kernel/git/konrad/xen:
  xen-gntalloc: signedness bug in add_grefs()
  xen-gntalloc: integer overflow in gntalloc_ioctl_alloc()
  xen-gntdev: integer overflow in gntdev_alloc_map()
  xen:pvhvm: enable PVHVM VCPU placement when using more than 32 CPUs.
  xen/balloon: Avoid OOM when requesting highmem
  xen: Remove hanging references to CONFIG_XEN_PLATFORM_PCI
  xen: map foreign pages for shared rings by updating the PTEs directly
This commit is contained in:
Linus Torvalds 2011-11-18 13:18:07 -02:00
commit b684452383
10 changed files with 36 additions and 35 deletions
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3
arch/x86/xen/enlighten.c
View File

@ -1356,7 +1356,7 @@ static int __cpuinit xen_hvm_cpu_notify(struct notifier_block *self,
int cpu = (long)hcpu;
switch (action) {
case CPU_UP_PREPARE:
per_cpu(xen_vcpu, cpu) = &HYPERVISOR_shared_info->vcpu_info[cpu];
xen_vcpu_setup(cpu);
if (xen_have_vector_callback)
xen_init_lock_cpu(cpu);
break;
@ -1386,7 +1386,6 @@ static void __init xen_hvm_guest_init(void)
xen_hvm_smp_init();
register_cpu_notifier(&xen_hvm_cpu_notifier);
xen_unplug_emulated_devices();
have_vcpu_info_placement = 0;
x86_init.irqs.intr_init = xen_init_IRQ;
xen_hvm_init_time_ops();
xen_hvm_init_mmu_ops();

2
arch/x86/xen/grant-table.c
View File

@ -71,7 +71,7 @@ int arch_gnttab_map_shared(unsigned long *frames, unsigned long nr_gframes,
if (shared == NULL) {
struct vm_struct *area =
alloc_vm_area(PAGE_SIZE * max_nr_gframes);
alloc_vm_area(PAGE_SIZE * max_nr_gframes, NULL);
BUG_ON(area == NULL);
shared = area->addr;
*__shared = shared;

4
drivers/xen/balloon.c
View File

@ -501,7 +501,7 @@ EXPORT_SYMBOL_GPL(balloon_set_new_target);
* alloc_xenballooned_pages - get pages that have been ballooned out
* @nr_pages: Number of pages to get
* @pages: pages returned
* @highmem: highmem or lowmem pages
* @highmem: allow highmem pages
* @return 0 on success, error otherwise
*/
int alloc_xenballooned_pages(int nr_pages, struct page **pages, bool highmem)
@ -511,7 +511,7 @@ int alloc_xenballooned_pages(int nr_pages, struct page **pages, bool highmem)
mutex_lock(&balloon_mutex);
while (pgno < nr_pages) {
page = balloon_retrieve(highmem);
if (page && PageHighMem(page) == highmem) {
if (page && (highmem || !PageHighMem(page))) {
pages[pgno++] = page;
} else {
enum bp_state st;

4
drivers/xen/gntalloc.c
View File

@ -135,7 +135,7 @@ static int add_grefs(struct ioctl_gntalloc_alloc_gref *op,
/* Grant foreign access to the page. */
gref->gref_id = gnttab_grant_foreign_access(op->domid,
pfn_to_mfn(page_to_pfn(gref->page)), readonly);
if (gref->gref_id < 0) {
if ((int)gref->gref_id < 0) {
rc = gref->gref_id;
goto undo;
}
@ -280,7 +280,7 @@ static long gntalloc_ioctl_alloc(struct gntalloc_file_private_data *priv,
goto out;
}
gref_ids = kzalloc(sizeof(gref_ids[0]) * op.count, GFP_TEMPORARY);
gref_ids = kcalloc(op.count, sizeof(gref_ids[0]), GFP_TEMPORARY);
if (!gref_ids) {
rc = -ENOMEM;
goto out;

10
drivers/xen/gntdev.c
View File

@ -114,11 +114,11 @@ static struct grant_map *gntdev_alloc_map(struct gntdev_priv *priv, int count)
if (NULL == add)
return NULL;
add->grants = kzalloc(sizeof(add->grants[0]) * count, GFP_KERNEL);
add->map_ops = kzalloc(sizeof(add->map_ops[0]) * count, GFP_KERNEL);
add->unmap_ops = kzalloc(sizeof(add->unmap_ops[0]) * count, GFP_KERNEL);
add->kmap_ops = kzalloc(sizeof(add->kmap_ops[0]) * count, GFP_KERNEL);
add->pages = kzalloc(sizeof(add->pages[0]) * count, GFP_KERNEL);
add->grants = kcalloc(count, sizeof(add->grants[0]), GFP_KERNEL);
add->map_ops = kcalloc(count, sizeof(add->map_ops[0]), GFP_KERNEL);
add->unmap_ops = kcalloc(count, sizeof(add->unmap_ops[0]), GFP_KERNEL);
add->kmap_ops = kcalloc(count, sizeof(add->kmap_ops[0]), GFP_KERNEL);
add->pages = kcalloc(count, sizeof(add->pages[0]), GFP_KERNEL);
if (NULL == add->grants ||
NULL == add->map_ops ||
NULL == add->unmap_ops ||

11
drivers/xen/xenbus/xenbus_client.c
View File

@ -35,6 +35,7 @@
#include <linux/vmalloc.h>
#include <linux/export.h>
#include <asm/xen/hypervisor.h>
#include <asm/xen/page.h>
#include <xen/interface/xen.h>
#include <xen/interface/event_channel.h>
#include <xen/events.h>
@ -436,19 +437,20 @@ EXPORT_SYMBOL_GPL(xenbus_free_evtchn);
int xenbus_map_ring_valloc(struct xenbus_device *dev, int gnt_ref, void **vaddr)
{
struct gnttab_map_grant_ref op = {
.flags = GNTMAP_host_map,
.flags = GNTMAP_host_map | GNTMAP_contains_pte,
.ref = gnt_ref,
.dom = dev->otherend_id,
};
struct vm_struct *area;
pte_t *pte;
*vaddr = NULL;
area = alloc_vm_area(PAGE_SIZE);
area = alloc_vm_area(PAGE_SIZE, &pte);
if (!area)
return -ENOMEM;
op.host_addr = (unsigned long)area->addr;
op.host_addr = arbitrary_virt_to_machine(pte).maddr;
if (HYPERVISOR_grant_table_op(GNTTABOP_map_grant_ref, &op, 1))
BUG();
@ -527,6 +529,7 @@ int xenbus_unmap_ring_vfree(struct xenbus_device *dev, void *vaddr)
struct gnttab_unmap_grant_ref op = {
.host_addr = (unsigned long)vaddr,
};
unsigned int level;
/* It'd be nice if linux/vmalloc.h provided a find_vm_area(void *addr)
* method so that we don't have to muck with vmalloc internals here.
@ -548,6 +551,8 @@ int xenbus_unmap_ring_vfree(struct xenbus_device *dev, void *vaddr)
}
op.handle = (grant_handle_t)area->phys_addr;
op.host_addr = arbitrary_virt_to_machine(
lookup_address((unsigned long)vaddr, &level)).maddr;
if (HYPERVISOR_grant_table_op(GNTTABOP_unmap_grant_ref, &op, 1))
BUG();

2
include/linux/vmalloc.h
View File

@ -119,7 +119,7 @@ unmap_kernel_range(unsigned long addr, unsigned long size)
#endif
/* Allocate/destroy a 'vmalloc' VM area. */
extern struct vm_struct *alloc_vm_area(size_t size);
extern struct vm_struct *alloc_vm_area(size_t size, pte_t **ptes);
extern void free_vm_area(struct vm_struct *area);
/* for /dev/kmem */

6
include/xen/platform_pci.h
View File

@ -29,8 +29,7 @@
static inline int xen_must_unplug_nics(void) {
#if (defined(CONFIG_XEN_NETDEV_FRONTEND) || \
defined(CONFIG_XEN_NETDEV_FRONTEND_MODULE)) && \
(defined(CONFIG_XEN_PLATFORM_PCI) || \
defined(CONFIG_XEN_PLATFORM_PCI_MODULE))
defined(CONFIG_XEN_PVHVM)
return 1;
#else
return 0;
@ -40,8 +39,7 @@ static inline int xen_must_unplug_nics(void) {
static inline int xen_must_unplug_disks(void) {
#if (defined(CONFIG_XEN_BLKDEV_FRONTEND) || \
defined(CONFIG_XEN_BLKDEV_FRONTEND_MODULE)) && \
(defined(CONFIG_XEN_PLATFORM_PCI) || \
defined(CONFIG_XEN_PLATFORM_PCI_MODULE))
defined(CONFIG_XEN_PVHVM)
return 1;
#else
return 0;

2
mm/nommu.c
View File

@ -454,7 +454,7 @@ void __attribute__((weak)) vmalloc_sync_all(void)
* between processes, it syncs the pagetable across all
* processes.
*/
struct vm_struct *alloc_vm_area(size_t size)
struct vm_struct *alloc_vm_area(size_t size, pte_t **ptes)
{
BUG();
return NULL;

27
mm/vmalloc.c
View File

@ -2141,23 +2141,30 @@ void __attribute__((weak)) vmalloc_sync_all(void)
static int f(pte_t *pte, pgtable_t table, unsigned long addr, void *data)
{
/* apply_to_page_range() does all the hard work. */
pte_t ***p = data;
if (p) {
*(*p) = pte;
(*p)++;
}
return 0;
}
/**
* alloc_vm_area - allocate a range of kernel address space
* @size: size of the area
* @ptes: returns the PTEs for the address space
*
* Returns: NULL on failure, vm_struct on success
*
* This function reserves a range of kernel address space, and
* allocates pagetables to map that range. No actual mappings
* are created. If the kernel address space is not shared
* between processes, it syncs the pagetable across all
* processes.
* are created.
*
* If @ptes is non-NULL, pointers to the PTEs (in init_mm)
* allocated for the VM area are returned.
*/
struct vm_struct *alloc_vm_area(size_t size)
struct vm_struct *alloc_vm_area(size_t size, pte_t **ptes)
{
struct vm_struct *area;
@ -2171,19 +2178,11 @@ struct vm_struct *alloc_vm_area(size_t size)
* of kernel virtual address space and mapped into init_mm.
*/
if (apply_to_page_range(&init_mm, (unsigned long)area->addr,
area->size, f, NULL)) {
size, f, ptes ? &ptes : NULL)) {
free_vm_area(area);
return NULL;
}
/*
* If the allocated address space is passed to a hypercall
* before being used then we cannot rely on a page fault to
* trigger an update of the page tables. So sync all the page
* tables here.
*/
vmalloc_sync_all();
return area;
}
EXPORT_SYMBOL_GPL(alloc_vm_area);