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-rw-r--r--drivers/virtio/Kconfig4
-rw-r--r--drivers/virtio/Makefile1
-rw-r--r--drivers/virtio/virtio.c4
-rw-r--r--drivers/virtio/virtio_anchor.c18
-rw-r--r--drivers/virtio/virtio_balloon.c49
-rw-r--r--drivers/virtio/virtio_mem.c6
6 files changed, 30 insertions, 52 deletions
diff --git a/drivers/virtio/Kconfig b/drivers/virtio/Kconfig
index 02bbccd602c0..0a53a61231c2 100644
--- a/drivers/virtio/Kconfig
+++ b/drivers/virtio/Kconfig
@@ -1,6 +1,10 @@
# SPDX-License-Identifier: GPL-2.0-only
+config VIRTIO_ANCHOR
+ bool
+
config VIRTIO
tristate
+ select VIRTIO_ANCHOR
help
This option is selected by any driver which implements the virtio
bus, such as CONFIG_VIRTIO_PCI, CONFIG_VIRTIO_MMIO, CONFIG_RPMSG
diff --git a/drivers/virtio/Makefile b/drivers/virtio/Makefile
index 0a82d0873248..8e98d24917cc 100644
--- a/drivers/virtio/Makefile
+++ b/drivers/virtio/Makefile
@@ -1,5 +1,6 @@
# SPDX-License-Identifier: GPL-2.0
obj-$(CONFIG_VIRTIO) += virtio.o virtio_ring.o
+obj-$(CONFIG_VIRTIO_ANCHOR) += virtio_anchor.o
obj-$(CONFIG_VIRTIO_PCI_LIB) += virtio_pci_modern_dev.o
obj-$(CONFIG_VIRTIO_PCI_LIB_LEGACY) += virtio_pci_legacy_dev.o
obj-$(CONFIG_VIRTIO_MMIO) += virtio_mmio.o
diff --git a/drivers/virtio/virtio.c b/drivers/virtio/virtio.c
index ddd4466da83b..828ced060742 100644
--- a/drivers/virtio/virtio.c
+++ b/drivers/virtio/virtio.c
@@ -2,10 +2,10 @@
#include <linux/virtio.h>
#include <linux/spinlock.h>
#include <linux/virtio_config.h>
+#include <linux/virtio_anchor.h>
#include <linux/module.h>
#include <linux/idr.h>
#include <linux/of.h>
-#include <linux/platform-feature.h>
#include <uapi/linux/virtio_ids.h>
/* Unique numbering for virtio devices. */
@@ -174,7 +174,7 @@ static int virtio_features_ok(struct virtio_device *dev)
might_sleep();
- if (platform_has(PLATFORM_VIRTIO_RESTRICTED_MEM_ACCESS)) {
+ if (virtio_check_mem_acc_cb(dev)) {
if (!virtio_has_feature(dev, VIRTIO_F_VERSION_1)) {
dev_warn(&dev->dev,
"device must provide VIRTIO_F_VERSION_1\n");
diff --git a/drivers/virtio/virtio_anchor.c b/drivers/virtio/virtio_anchor.c
new file mode 100644
index 000000000000..4d6a5d269b55
--- /dev/null
+++ b/drivers/virtio/virtio_anchor.c
@@ -0,0 +1,18 @@
+// SPDX-License-Identifier: GPL-2.0-only
+#include <linux/virtio.h>
+#include <linux/virtio_anchor.h>
+
+bool virtio_require_restricted_mem_acc(struct virtio_device *dev)
+{
+ return true;
+}
+EXPORT_SYMBOL_GPL(virtio_require_restricted_mem_acc);
+
+static bool virtio_no_restricted_mem_acc(struct virtio_device *dev)
+{
+ return false;
+}
+
+bool (*virtio_check_mem_acc_cb)(struct virtio_device *dev) =
+ virtio_no_restricted_mem_acc;
+EXPORT_SYMBOL_GPL(virtio_check_mem_acc_cb);
diff --git a/drivers/virtio/virtio_balloon.c b/drivers/virtio/virtio_balloon.c
index b9737da6c4dd..3f78a3a1eb75 100644
--- a/drivers/virtio/virtio_balloon.c
+++ b/drivers/virtio/virtio_balloon.c
@@ -17,9 +17,6 @@
#include <linux/oom.h>
#include <linux/wait.h>
#include <linux/mm.h>
-#include <linux/mount.h>
-#include <linux/magic.h>
-#include <linux/pseudo_fs.h>
#include <linux/page_reporting.h>
/*
@@ -42,10 +39,6 @@
(1 << (VIRTIO_BALLOON_HINT_BLOCK_ORDER + PAGE_SHIFT))
#define VIRTIO_BALLOON_HINT_BLOCK_PAGES (1 << VIRTIO_BALLOON_HINT_BLOCK_ORDER)
-#ifdef CONFIG_BALLOON_COMPACTION
-static struct vfsmount *balloon_mnt;
-#endif
-
enum virtio_balloon_vq {
VIRTIO_BALLOON_VQ_INFLATE,
VIRTIO_BALLOON_VQ_DEFLATE,
@@ -805,18 +798,6 @@ static int virtballoon_migratepage(struct balloon_dev_info *vb_dev_info,
return MIGRATEPAGE_SUCCESS;
}
-
-static int balloon_init_fs_context(struct fs_context *fc)
-{
- return init_pseudo(fc, BALLOON_KVM_MAGIC) ? 0 : -ENOMEM;
-}
-
-static struct file_system_type balloon_fs = {
- .name = "balloon-kvm",
- .init_fs_context = balloon_init_fs_context,
- .kill_sb = kill_anon_super,
-};
-
#endif /* CONFIG_BALLOON_COMPACTION */
static unsigned long shrink_free_pages(struct virtio_balloon *vb,
@@ -875,7 +856,7 @@ static int virtio_balloon_register_shrinker(struct virtio_balloon *vb)
vb->shrinker.count_objects = virtio_balloon_shrinker_count;
vb->shrinker.seeks = DEFAULT_SEEKS;
- return register_shrinker(&vb->shrinker);
+ return register_shrinker(&vb->shrinker, "virtio-balloon");
}
static int virtballoon_probe(struct virtio_device *vdev)
@@ -909,19 +890,7 @@ static int virtballoon_probe(struct virtio_device *vdev)
goto out_free_vb;
#ifdef CONFIG_BALLOON_COMPACTION
- balloon_mnt = kern_mount(&balloon_fs);
- if (IS_ERR(balloon_mnt)) {
- err = PTR_ERR(balloon_mnt);
- goto out_del_vqs;
- }
-
vb->vb_dev_info.migratepage = virtballoon_migratepage;
- vb->vb_dev_info.inode = alloc_anon_inode(balloon_mnt->mnt_sb);
- if (IS_ERR(vb->vb_dev_info.inode)) {
- err = PTR_ERR(vb->vb_dev_info.inode);
- goto out_kern_unmount;
- }
- vb->vb_dev_info.inode->i_mapping->a_ops = &balloon_aops;
#endif
if (virtio_has_feature(vdev, VIRTIO_BALLOON_F_FREE_PAGE_HINT)) {
/*
@@ -930,13 +899,13 @@ static int virtballoon_probe(struct virtio_device *vdev)
*/
if (virtqueue_get_vring_size(vb->free_page_vq) < 2) {
err = -ENOSPC;
- goto out_iput;
+ goto out_del_vqs;
}
vb->balloon_wq = alloc_workqueue("balloon-wq",
WQ_FREEZABLE | WQ_CPU_INTENSIVE, 0);
if (!vb->balloon_wq) {
err = -ENOMEM;
- goto out_iput;
+ goto out_del_vqs;
}
INIT_WORK(&vb->report_free_page_work, report_free_page_func);
vb->cmd_id_received_cache = VIRTIO_BALLOON_CMD_ID_STOP;
@@ -1030,13 +999,7 @@ out_unregister_shrinker:
out_del_balloon_wq:
if (virtio_has_feature(vdev, VIRTIO_BALLOON_F_FREE_PAGE_HINT))
destroy_workqueue(vb->balloon_wq);
-out_iput:
-#ifdef CONFIG_BALLOON_COMPACTION
- iput(vb->vb_dev_info.inode);
-out_kern_unmount:
- kern_unmount(balloon_mnt);
out_del_vqs:
-#endif
vdev->config->del_vqs(vdev);
out_free_vb:
kfree(vb);
@@ -1083,12 +1046,6 @@ static void virtballoon_remove(struct virtio_device *vdev)
}
remove_common(vb);
-#ifdef CONFIG_BALLOON_COMPACTION
- if (vb->vb_dev_info.inode)
- iput(vb->vb_dev_info.inode);
-
- kern_unmount(balloon_mnt);
-#endif
kfree(vb);
}
diff --git a/drivers/virtio/virtio_mem.c b/drivers/virtio/virtio_mem.c
index e07486f01999..0c2892ec6817 100644
--- a/drivers/virtio/virtio_mem.c
+++ b/drivers/virtio/virtio_mem.c
@@ -862,8 +862,7 @@ static void virtio_mem_sbm_notify_online(struct virtio_mem *vm,
unsigned long mb_id,
unsigned long start_pfn)
{
- const bool is_movable = page_zonenum(pfn_to_page(start_pfn)) ==
- ZONE_MOVABLE;
+ const bool is_movable = is_zone_movable_page(pfn_to_page(start_pfn));
int new_state;
switch (virtio_mem_sbm_get_mb_state(vm, mb_id)) {
@@ -1158,8 +1157,7 @@ static void virtio_mem_fake_online(unsigned long pfn, unsigned long nr_pages)
*/
static int virtio_mem_fake_offline(unsigned long pfn, unsigned long nr_pages)
{
- const bool is_movable = page_zonenum(pfn_to_page(pfn)) ==
- ZONE_MOVABLE;
+ const bool is_movable = is_zone_movable_page(pfn_to_page(pfn));
int rc, retry_count;
/*
generated by cgit v1.2.3 (git 2.39.1) at 2024-06-05 03:48:03 +0000