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-rw-r--r--drivers/xen/balloon.c32
-rw-r--r--drivers/xen/events.c13
-rw-r--r--drivers/xen/xenfs/privcmd.c13
-rw-r--r--drivers/xen/xenfs/super.c46
4 files changed, 37 insertions, 67 deletions
diff --git a/drivers/xen/balloon.c b/drivers/xen/balloon.c
index 500290b150bb..2b17ad5b4b32 100644
--- a/drivers/xen/balloon.c
+++ b/drivers/xen/balloon.c
@@ -50,6 +50,7 @@
#include <asm/pgtable.h>
#include <asm/uaccess.h>
#include <asm/tlb.h>
+#include <asm/e820.h>
#include <asm/xen/hypervisor.h>
#include <asm/xen/hypercall.h>
@@ -119,7 +120,7 @@ static void scrub_page(struct page *page)
}
/* balloon_append: add the given page to the balloon. */
-static void balloon_append(struct page *page)
+static void __balloon_append(struct page *page)
{
/* Lowmem is re-populated first, so highmem pages go at list tail. */
if (PageHighMem(page)) {
@@ -130,7 +131,11 @@ static void balloon_append(struct page *page)
list_add(&page->lru, &ballooned_pages);
balloon_stats.balloon_low++;
}
+}
+static void balloon_append(struct page *page)
+{
+ __balloon_append(page);
totalram_pages--;
}
@@ -191,7 +196,7 @@ static unsigned long current_target(void)
static int increase_reservation(unsigned long nr_pages)
{
- unsigned long pfn, i, flags;
+ unsigned long pfn, i;
struct page *page;
long rc;
struct xen_memory_reservation reservation = {
@@ -203,8 +208,6 @@ static int increase_reservation(unsigned long nr_pages)
if (nr_pages > ARRAY_SIZE(frame_list))
nr_pages = ARRAY_SIZE(frame_list);
- spin_lock_irqsave(&xen_reservation_lock, flags);
-
page = balloon_first_page();
for (i = 0; i < nr_pages; i++) {
BUG_ON(page == NULL);
@@ -247,14 +250,12 @@ static int increase_reservation(unsigned long nr_pages)
balloon_stats.current_pages += rc;
out:
- spin_unlock_irqrestore(&xen_reservation_lock, flags);
-
return rc < 0 ? rc : rc != nr_pages;
}
static int decrease_reservation(unsigned long nr_pages)
{
- unsigned long pfn, i, flags;
+ unsigned long pfn, i;
struct page *page;
int need_sleep = 0;
int ret;
@@ -292,8 +293,6 @@ static int decrease_reservation(unsigned long nr_pages)
kmap_flush_unused();
flush_tlb_all();
- spin_lock_irqsave(&xen_reservation_lock, flags);
-
/* No more mappings: invalidate P2M and add to balloon. */
for (i = 0; i < nr_pages; i++) {
pfn = mfn_to_pfn(frame_list[i]);
@@ -308,8 +307,6 @@ static int decrease_reservation(unsigned long nr_pages)
balloon_stats.current_pages -= nr_pages;
- spin_unlock_irqrestore(&xen_reservation_lock, flags);
-
return need_sleep;
}
@@ -395,7 +392,7 @@ static struct notifier_block xenstore_notifier;
static int __init balloon_init(void)
{
- unsigned long pfn;
+ unsigned long pfn, extra_pfn_end;
struct page *page;
if (!xen_pv_domain())
@@ -416,10 +413,15 @@ static int __init balloon_init(void)
register_balloon(&balloon_sysdev);
/* Initialise the balloon with excess memory space. */
- for (pfn = xen_start_info->nr_pages; pfn < max_pfn; pfn++) {
+ extra_pfn_end = min(e820_end_of_ram_pfn(),
+ (unsigned long)PFN_DOWN(xen_extra_mem_start + xen_extra_mem_size));
+ for (pfn = PFN_UP(xen_extra_mem_start);
+ pfn < extra_pfn_end;
+ pfn++) {
page = pfn_to_page(pfn);
- if (!PageReserved(page))
- balloon_append(page);
+ /* totalram_pages doesn't include the boot-time
+ balloon extension, so don't subtract from it. */
+ __balloon_append(page);
}
target_watch.callback = watch_target;
diff --git a/drivers/xen/events.c b/drivers/xen/events.c
index 321a0c8346e5..2811bb988ea0 100644
--- a/drivers/xen/events.c
+++ b/drivers/xen/events.c
@@ -278,17 +278,17 @@ static void bind_evtchn_to_cpu(unsigned int chn, unsigned int cpu)
cpumask_copy(irq_to_desc(irq)->affinity, cpumask_of(cpu));
#endif
- __clear_bit(chn, cpu_evtchn_mask(cpu_from_irq(irq)));
- __set_bit(chn, cpu_evtchn_mask(cpu));
+ clear_bit(chn, cpu_evtchn_mask(cpu_from_irq(irq)));
+ set_bit(chn, cpu_evtchn_mask(cpu));
irq_info[irq].cpu = cpu;
}
static void init_evtchn_cpu_bindings(void)
{
+ int i;
#ifdef CONFIG_SMP
struct irq_desc *desc;
- int i;
/* By default all event channels notify CPU#0. */
for_each_irq_desc(i, desc) {
@@ -296,7 +296,10 @@ static void init_evtchn_cpu_bindings(void)
}
#endif
- memset(cpu_evtchn_mask(0), ~0, sizeof(struct cpu_evtchn_s));
+ for_each_possible_cpu(i)
+ memset(cpu_evtchn_mask(i),
+ (i == 0) ? ~0 : 0, sizeof(struct cpu_evtchn_s));
+
}
static inline void clear_evtchn(int port)
@@ -752,7 +755,7 @@ int xen_destroy_irq(int irq)
goto out;
if (xen_initial_domain()) {
- unmap_irq.pirq = info->u.pirq.gsi;
+ unmap_irq.pirq = info->u.pirq.pirq;
unmap_irq.domid = DOMID_SELF;
rc = HYPERVISOR_physdev_op(PHYSDEVOP_unmap_pirq, &unmap_irq);
if (rc) {
diff --git a/drivers/xen/xenfs/privcmd.c b/drivers/xen/xenfs/privcmd.c
index f80be7f6eb95..88474d460d82 100644
--- a/drivers/xen/xenfs/privcmd.c
+++ b/drivers/xen/xenfs/privcmd.c
@@ -266,9 +266,7 @@ static int mmap_return_errors(void *data, void *state)
xen_pfn_t *mfnp = data;
struct mmap_batch_state *st = state;
- put_user(*mfnp, st->user++);
-
- return 0;
+ return put_user(*mfnp, st->user++);
}
static struct vm_operations_struct privcmd_vm_ops;
@@ -323,10 +321,8 @@ static long privcmd_ioctl_mmap_batch(void __user *udata)
up_write(&mm->mmap_sem);
if (state.err > 0) {
- ret = 0;
-
state.user = m.arr;
- traverse_pages(m.num, sizeof(xen_pfn_t),
+ ret = traverse_pages(m.num, sizeof(xen_pfn_t),
&pagelist,
mmap_return_errors, &state);
}
@@ -384,8 +380,9 @@ static int privcmd_mmap(struct file *file, struct vm_area_struct *vma)
if (xen_feature(XENFEAT_auto_translated_physmap))
return -ENOSYS;
- /* DONTCOPY is essential for Xen as copy_page_range is broken. */
- vma->vm_flags |= VM_RESERVED | VM_IO | VM_DONTCOPY;
+ /* DONTCOPY is essential for Xen because copy_page_range doesn't know
+ * how to recreate these mappings */
+ vma->vm_flags |= VM_RESERVED | VM_IO | VM_DONTCOPY | VM_PFNMAP;
vma->vm_ops = &privcmd_vm_ops;
vma->vm_private_data = NULL;
diff --git a/drivers/xen/xenfs/super.c b/drivers/xen/xenfs/super.c
index f6339d11d59c..1aa389719846 100644
--- a/drivers/xen/xenfs/super.c
+++ b/drivers/xen/xenfs/super.c
@@ -12,8 +12,6 @@
#include <linux/module.h>
#include <linux/fs.h>
#include <linux/magic.h>
-#include <linux/mm.h>
-#include <linux/backing-dev.h>
#include <xen/xen.h>
@@ -24,28 +22,12 @@
MODULE_DESCRIPTION("Xen filesystem");
MODULE_LICENSE("GPL");
-static int xenfs_set_page_dirty(struct page *page)
-{
- return !TestSetPageDirty(page);
-}
-
-static const struct address_space_operations xenfs_aops = {
- .set_page_dirty = xenfs_set_page_dirty,
-};
-
-static struct backing_dev_info xenfs_backing_dev_info = {
- .ra_pages = 0, /* No readahead */
- .capabilities = BDI_CAP_NO_ACCT_AND_WRITEBACK,
-};
-
static struct inode *xenfs_make_inode(struct super_block *sb, int mode)
{
struct inode *ret = new_inode(sb);
if (ret) {
ret->i_mode = mode;
- ret->i_mapping->a_ops = &xenfs_aops;
- ret->i_mapping->backing_dev_info = &xenfs_backing_dev_info;
ret->i_uid = ret->i_gid = 0;
ret->i_blocks = 0;
ret->i_atime = ret->i_mtime = ret->i_ctime = CURRENT_TIME;
@@ -121,9 +103,9 @@ static int xenfs_fill_super(struct super_block *sb, void *data, int silent)
return rc;
}
-static int xenfs_mount(struct file_system_type *fs_type,
- int flags, const char *dev_name,
- void *data)
+static struct dentry *xenfs_mount(struct file_system_type *fs_type,
+ int flags, const char *dev_name,
+ void *data)
{
return mount_single(fs_type, flags, data, xenfs_fill_super);
}
@@ -137,25 +119,11 @@ static struct file_system_type xenfs_type = {
static int __init xenfs_init(void)
{
- int err;
- if (!xen_domain()) {
- printk(KERN_INFO "xenfs: not registering filesystem on non-xen platform\n");
- return 0;
- }
-
- err = register_filesystem(&xenfs_type);
- if (err) {
- printk(KERN_ERR "xenfs: Unable to register filesystem!\n");
- goto out;
- }
-
- err = bdi_init(&xenfs_backing_dev_info);
- if (err)
- unregister_filesystem(&xenfs_type);
-
- out:
+ if (xen_domain())
+ return register_filesystem(&xenfs_type);
- return err;
+ printk(KERN_INFO "XENFS: not registering filesystem on non-xen platform\n");
+ return 0;
}
static void __exit xenfs_exit(void)
generated by cgit v1.2.3-55-g7522 (git 2.39.0) at 2024-07-17 17:01:35 +0200