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authorChangbin Du <changbin.du@intel.com>2018-03-05 10:30:34 +0300
committerZhenyu Wang <zhenyuw@linux.intel.com>2018-03-06 08:19:28 +0300
commit6846dfeb87a623e0bf31df4b6a7041d70277b0e5 (patch)
tree7a1d79e8482b4b7b60486173bba6274094d869a1 /drivers/gpu/drm/i915/gvt/kvmgt.c
parentcf4ee73fd9b6d31fa7530f72cff5cc97b94f1272 (diff)
downloadlinux-6846dfeb87a623e0bf31df4b6a7041d70277b0e5.tar.xz
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>
Diffstat (limited to 'drivers/gpu/drm/i915/gvt/kvmgt.c')
-rw-r--r--drivers/gpu/drm/i915/gvt/kvmgt.c15
1 files changed, 15 insertions, 0 deletions
diff --git a/drivers/gpu/drm/i915/gvt/kvmgt.c b/drivers/gpu/drm/i915/gvt/kvmgt.c
index 99a8ff3fe75a..8a428678e4b5 100644
--- a/drivers/gpu/drm/i915/gvt/kvmgt.c
+++ b/drivers/gpu/drm/i915/gvt/kvmgt.c
@@ -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);