p71924506
/
linux_old1
1
0
Fork 0
Code Issues Pull Requests Projects Releases Wiki Activity

drm/i915/kvmgt: Add kvmgt debugfs entry nr_cache_entries under vgpu 

Add a new debugfs entry kvmgt_nr_cache_entries under vgpu which shows
the number of entry in dma cache.

$ cat /sys/kernel/debug/gvt/vgpu1/kvmgt_nr_cache_entries
10101

v3: fix compiling error for some configuration. (Xiong Zhang <xiong.y.zhang@intel.com>)
v2: keep debugfs layout flat.

Signed-off-by: Changbin Du <changbin.du@intel.com>
Signed-off-by: Zhenyu Wang <zhenyuw@linux.intel.com>
This commit is contained in:
Changbin Du 2018-03-05 15:30:34 +08:00 committed by Zhenyu Wang
parent cf4ee73fd9
commit 6846dfeb87
2 changed files with 16 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

1
drivers/gpu/drm/i915/gvt/gvt.h
View File

@ -208,6 +208,7 @@ struct intel_vgpu {
*/
struct rb_root gfn_cache;
struct rb_root dma_addr_cache;
unsigned long nr_cache_entries;
struct mutex cache_lock;
struct notifier_block iommu_notifier;

15
drivers/gpu/drm/i915/gvt/kvmgt.c
View File

@ -41,6 +41,7 @@
#include <linux/kvm_host.h>
#include <linux/vfio.h>
#include <linux/mdev.h>
#include <linux/debugfs.h>
#include "i915_drv.h"
#include "gvt.h"
@ -84,6 +85,7 @@ struct kvmgt_guest_info {
#define NR_BKT (1 << 18)
struct hlist_head ptable[NR_BKT];
#undef NR_BKT
struct dentry *debugfs_cache_entries;
};
struct gvt_dma {
@ -225,6 +227,8 @@ static void __gvt_cache_add(struct intel_vgpu *vgpu, gfn_t gfn,
}
rb_link_node(&new->dma_addr_node, parent, link);
rb_insert_color(&new->dma_addr_node, &vgpu->vdev.dma_addr_cache);
vgpu->vdev.nr_cache_entries++;
}
static void __gvt_cache_remove_entry(struct intel_vgpu *vgpu,
@ -233,6 +237,7 @@ static void __gvt_cache_remove_entry(struct intel_vgpu *vgpu,
rb_erase(&entry->gfn_node, &vgpu->vdev.gfn_cache);
rb_erase(&entry->dma_addr_node, &vgpu->vdev.dma_addr_cache);
kfree(entry);
vgpu->vdev.nr_cache_entries--;
}
static void gvt_cache_destroy(struct intel_vgpu *vgpu)
@ -258,6 +263,7 @@ static void gvt_cache_init(struct intel_vgpu *vgpu)
{
vgpu->vdev.gfn_cache = RB_ROOT;
vgpu->vdev.dma_addr_cache = RB_ROOT;
vgpu->vdev.nr_cache_entries = 0;
mutex_init(&vgpu->vdev.cache_lock);
}
@ -1493,11 +1499,20 @@ static int kvmgt_guest_init(struct mdev_device *mdev)
info->track_node.track_flush_slot = kvmgt_page_track_flush_slot;
kvm_page_track_register_notifier(kvm, &info->track_node);
info->debugfs_cache_entries = debugfs_create_ulong(
"kvmgt_nr_cache_entries",
0444, vgpu->debugfs,
&vgpu->vdev.nr_cache_entries);
if (!info->debugfs_cache_entries)
gvt_vgpu_err("Cannot create kvmgt debugfs entry\n");
return 0;
}
static bool kvmgt_guest_exit(struct kvmgt_guest_info *info)
{
debugfs_remove(info->debugfs_cache_entries);
kvm_page_track_unregister_notifier(info->kvm, &info->track_node);
kvm_put_kvm(info->kvm);
kvmgt_protect_table_destroy(info);