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Merge tag 'gvt-fixes-2023-01-05' of https://github.com/intel/gvt-linux into drm-intel-fixes

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gvt-fixes-2023-01-05

- Fix one missed unpin in error of intel_vgpu_shadow_mm_pin()
- Fix two debugfs destroy oops issues for vgpu and gvt entries
- Fix one potential double free issue in gtt shadow pt code
- Fix to use atomic bit flag for vgpu status

Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
From: Zhenyu Wang <zhenyuw@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/Y7YWoFpz4plnSLCd@zhen-hp.sh.intel.com
This commit is contained in:
Rodrigo Vivi 2023-01-05 08:03:38 -05:00
commit 87809d3196
8 changed files with 80 additions and 48 deletions
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28
drivers/gpu/drm/i915/gvt/debugfs.c
View File

@ -151,6 +151,22 @@ DEFINE_SIMPLE_ATTRIBUTE(vgpu_scan_nonprivbb_fops,
vgpu_scan_nonprivbb_get, vgpu_scan_nonprivbb_set,
"0x%llx\n");
static int vgpu_status_get(void *data, u64 *val)
{
struct intel_vgpu *vgpu = (struct intel_vgpu *)data;
*val = 0;
if (test_bit(INTEL_VGPU_STATUS_ATTACHED, vgpu->status))
*val |= (1 << INTEL_VGPU_STATUS_ATTACHED);
if (test_bit(INTEL_VGPU_STATUS_ACTIVE, vgpu->status))
*val |= (1 << INTEL_VGPU_STATUS_ACTIVE);
return 0;
}
DEFINE_SIMPLE_ATTRIBUTE(vgpu_status_fops, vgpu_status_get, NULL, "0x%llx\n");
/**
* intel_gvt_debugfs_add_vgpu - register debugfs entries for a vGPU
* @vgpu: a vGPU
@ -162,11 +178,12 @@ void intel_gvt_debugfs_add_vgpu(struct intel_vgpu *vgpu)
snprintf(name, 16, "vgpu%d", vgpu->id);
vgpu->debugfs = debugfs_create_dir(name, vgpu->gvt->debugfs_root);
debugfs_create_bool("active", 0444, vgpu->debugfs, &vgpu->active);
debugfs_create_file("mmio_diff", 0444, vgpu->debugfs, vgpu,
&vgpu_mmio_diff_fops);
debugfs_create_file("scan_nonprivbb", 0644, vgpu->debugfs, vgpu,
&vgpu_scan_nonprivbb_fops);
debugfs_create_file("status", 0644, vgpu->debugfs, vgpu,
&vgpu_status_fops);
}
/**
@ -175,8 +192,13 @@ void intel_gvt_debugfs_add_vgpu(struct intel_vgpu *vgpu)
*/
void intel_gvt_debugfs_remove_vgpu(struct intel_vgpu *vgpu)
{
struct intel_gvt *gvt = vgpu->gvt;
struct drm_minor *minor = gvt->gt->i915->drm.primary;
if (minor->debugfs_root && gvt->debugfs_root) {
debugfs_remove_recursive(vgpu->debugfs);
vgpu->debugfs = NULL;
}
}
/**
@ -199,6 +221,10 @@ void intel_gvt_debugfs_init(struct intel_gvt *gvt)
*/
void intel_gvt_debugfs_clean(struct intel_gvt *gvt)
{
struct drm_minor *minor = gvt->gt->i915->drm.primary;
if (minor->debugfs_root) {
debugfs_remove_recursive(gvt->debugfs_root);
gvt->debugfs_root = NULL;
}
}

3
drivers/gpu/drm/i915/gvt/dmabuf.c
View File

@ -134,7 +134,8 @@ static void dmabuf_gem_object_free(struct kref *kref)
struct list_head *pos;
struct intel_vgpu_dmabuf_obj *dmabuf_obj;
if (vgpu && vgpu->active && !list_empty(&vgpu->dmabuf_obj_list_head)) {
if (vgpu && test_bit(INTEL_VGPU_STATUS_ACTIVE, vgpu->status) &&
!list_empty(&vgpu->dmabuf_obj_list_head)) {
list_for_each(pos, &vgpu->dmabuf_obj_list_head) {
dmabuf_obj = list_entry(pos, struct intel_vgpu_dmabuf_obj, list);
if (dmabuf_obj == obj) {

21
drivers/gpu/drm/i915/gvt/gtt.c
View File

@ -55,7 +55,7 @@ static bool intel_gvt_is_valid_gfn(struct intel_vgpu *vgpu, unsigned long gfn)
int idx;
bool ret;
if (!vgpu->attached)
if (!test_bit(INTEL_VGPU_STATUS_ATTACHED, vgpu->status))
return false;
idx = srcu_read_lock(&kvm->srcu);
@ -1178,7 +1178,7 @@ static int is_2MB_gtt_possible(struct intel_vgpu *vgpu,
if (!HAS_PAGE_SIZES(vgpu->gvt->gt->i915, I915_GTT_PAGE_SIZE_2M))
return 0;
if (!vgpu->attached)
if (!test_bit(INTEL_VGPU_STATUS_ATTACHED, vgpu->status))
return -EINVAL;
pfn = gfn_to_pfn(vgpu->vfio_device.kvm, ops->get_pfn(entry));
if (is_error_noslot_pfn(pfn))
@ -1209,10 +1209,8 @@ static int split_2MB_gtt_entry(struct intel_vgpu *vgpu,
for_each_shadow_entry(sub_spt, &sub_se, sub_index) {
ret = intel_gvt_dma_map_guest_page(vgpu, start_gfn + sub_index,
PAGE_SIZE, &dma_addr);
if (ret) {
ppgtt_invalidate_spt(spt);
return ret;
}
if (ret)
goto err;
sub_se.val64 = se->val64;
/* Copy the PAT field from PDE. */
@ -1231,6 +1229,17 @@ static int split_2MB_gtt_entry(struct intel_vgpu *vgpu,
ops->set_pfn(se, sub_spt->shadow_page.mfn);
ppgtt_set_shadow_entry(spt, se, index);
return 0;
err:
/* Cancel the existing addess mappings of DMA addr. */
for_each_present_shadow_entry(sub_spt, &sub_se, sub_index) {
gvt_vdbg_mm("invalidate 4K entry\n");
ppgtt_invalidate_pte(sub_spt, &sub_se);
}
/* Release the new allocated spt. */
trace_spt_change(sub_spt->vgpu->id, "release", sub_spt,
sub_spt->guest_page.gfn, sub_spt->shadow_page.type);
ppgtt_free_spt(sub_spt);
return ret;
}
static int split_64KB_gtt_entry(struct intel_vgpu *vgpu,

15
drivers/gpu/drm/i915/gvt/gvt.h
View File

@ -172,13 +172,18 @@ struct intel_vgpu_submission {
#define KVMGT_DEBUGFS_FILENAME "kvmgt_nr_cache_entries"
enum {
INTEL_VGPU_STATUS_ATTACHED = 0,
INTEL_VGPU_STATUS_ACTIVE,
INTEL_VGPU_STATUS_NR_BITS,
};
struct intel_vgpu {
struct vfio_device vfio_device;
struct intel_gvt *gvt;
struct mutex vgpu_lock;
int id;
bool active;
bool attached;
DECLARE_BITMAP(status, INTEL_VGPU_STATUS_NR_BITS);
bool pv_notified;
bool failsafe;
unsigned int resetting_eng;
@ -467,7 +472,7 @@ void intel_vgpu_write_fence(struct intel_vgpu *vgpu,
#define for_each_active_vgpu(gvt, vgpu, id) \
idr_for_each_entry((&(gvt)->vgpu_idr), (vgpu), (id)) \
for_each_if(vgpu->active)
for_each_if(test_bit(INTEL_VGPU_STATUS_ACTIVE, vgpu->status))
static inline void intel_vgpu_write_pci_bar(struct intel_vgpu *vgpu,
u32 offset, u32 val, bool low)
@ -725,7 +730,7 @@ static inline bool intel_gvt_mmio_is_cmd_write_patch(
static inline int intel_gvt_read_gpa(struct intel_vgpu *vgpu, unsigned long gpa,
void *buf, unsigned long len)
{
if (!vgpu->attached)
if (!test_bit(INTEL_VGPU_STATUS_ATTACHED, vgpu->status))
return -ESRCH;
return vfio_dma_rw(&vgpu->vfio_device, gpa, buf, len, false);
}
@ -743,7 +748,7 @@ static inline int intel_gvt_read_gpa(struct intel_vgpu *vgpu, unsigned long gpa,
static inline int intel_gvt_write_gpa(struct intel_vgpu *vgpu,
unsigned long gpa, void *buf, unsigned long len)
{
if (!vgpu->attached)
if (!test_bit(INTEL_VGPU_STATUS_ATTACHED, vgpu->status))
return -ESRCH;
return vfio_dma_rw(&vgpu->vfio_device, gpa, buf, len, true);
}

2
drivers/gpu/drm/i915/gvt/interrupt.c
View File

@ -433,7 +433,7 @@ static int inject_virtual_interrupt(struct intel_vgpu *vgpu)
* enabled by guest. so if msi_trigger is null, success is still
* returned and don't inject interrupt into guest.
*/
if (!vgpu->attached)
if (!test_bit(INTEL_VGPU_STATUS_ATTACHED, vgpu->status))
return -ESRCH;
if (vgpu->msi_trigger && eventfd_signal(vgpu->msi_trigger, 1) != 1)
return -EFAULT;

35
drivers/gpu/drm/i915/gvt/kvmgt.c
View File

@ -638,7 +638,7 @@ static bool __kvmgt_vgpu_exist(struct intel_vgpu *vgpu)
mutex_lock(&vgpu->gvt->lock);
for_each_active_vgpu(vgpu->gvt, itr, id) {
if (!itr->attached)
if (!test_bit(INTEL_VGPU_STATUS_ATTACHED, itr->status))
continue;
if (vgpu->vfio_device.kvm == itr->vfio_device.kvm) {
@ -655,9 +655,6 @@ static int intel_vgpu_open_device(struct vfio_device *vfio_dev)
{
struct intel_vgpu *vgpu = vfio_dev_to_vgpu(vfio_dev);
if (vgpu->attached)
return -EEXIST;
if (!vgpu->vfio_device.kvm ||
vgpu->vfio_device.kvm->mm != current->mm) {
gvt_vgpu_err("KVM is required to use Intel vGPU\n");
@ -667,14 +664,14 @@ static int intel_vgpu_open_device(struct vfio_device *vfio_dev)
if (__kvmgt_vgpu_exist(vgpu))
return -EEXIST;
vgpu->attached = true;
vgpu->track_node.track_write = kvmgt_page_track_write;
vgpu->track_node.track_flush_slot = kvmgt_page_track_flush_slot;
kvm_get_kvm(vgpu->vfio_device.kvm);
kvm_page_track_register_notifier(vgpu->vfio_device.kvm,
&vgpu->track_node);
set_bit(INTEL_VGPU_STATUS_ATTACHED, vgpu->status);
debugfs_create_ulong(KVMGT_DEBUGFS_FILENAME, 0444, vgpu->debugfs,
&vgpu->nr_cache_entries);
@ -698,11 +695,10 @@ static void intel_vgpu_close_device(struct vfio_device *vfio_dev)
{
struct intel_vgpu *vgpu = vfio_dev_to_vgpu(vfio_dev);
if (!vgpu->attached)
return;
intel_gvt_release_vgpu(vgpu);
clear_bit(INTEL_VGPU_STATUS_ATTACHED, vgpu->status);
debugfs_remove(debugfs_lookup(KVMGT_DEBUGFS_FILENAME, vgpu->debugfs));
kvm_page_track_unregister_notifier(vgpu->vfio_device.kvm,
@ -718,8 +714,6 @@ static void intel_vgpu_close_device(struct vfio_device *vfio_dev)
vgpu->dma_addr_cache = RB_ROOT;
intel_vgpu_release_msi_eventfd_ctx(vgpu);
vgpu->attached = false;
}
static u64 intel_vgpu_get_bar_addr(struct intel_vgpu *vgpu, int bar)
@ -1512,9 +1506,6 @@ static void intel_vgpu_remove(struct mdev_device *mdev)
{
struct intel_vgpu *vgpu = dev_get_drvdata(&mdev->dev);
if (WARN_ON_ONCE(vgpu->attached))
return;
vfio_unregister_group_dev(&vgpu->vfio_device);
vfio_put_device(&vgpu->vfio_device);
}
@ -1559,7 +1550,7 @@ int intel_gvt_page_track_add(struct intel_vgpu *info, u64 gfn)
struct kvm_memory_slot *slot;
int idx;
if (!info->attached)
if (!test_bit(INTEL_VGPU_STATUS_ATTACHED, info->status))
return -ESRCH;
idx = srcu_read_lock(&kvm->srcu);
@ -1589,8 +1580,8 @@ int intel_gvt_page_track_remove(struct intel_vgpu *info, u64 gfn)
struct kvm_memory_slot *slot;
int idx;
if (!info->attached)
return 0;
if (!test_bit(INTEL_VGPU_STATUS_ATTACHED, info->status))
return -ESRCH;
idx = srcu_read_lock(&kvm->srcu);
slot = gfn_to_memslot(kvm, gfn);
@ -1668,7 +1659,7 @@ int intel_gvt_dma_map_guest_page(struct intel_vgpu *vgpu, unsigned long gfn,
struct gvt_dma *entry;
int ret;
if (!vgpu->attached)
if (!test_bit(INTEL_VGPU_STATUS_ATTACHED, vgpu->status))
return -EINVAL;
mutex_lock(&vgpu->cache_lock);
@ -1714,8 +1705,8 @@ int intel_gvt_dma_pin_guest_page(struct intel_vgpu *vgpu, dma_addr_t dma_addr)
struct gvt_dma *entry;
int ret = 0;
if (!vgpu->attached)
return -ENODEV;
if (!test_bit(INTEL_VGPU_STATUS_ATTACHED, vgpu->status))
return -EINVAL;
mutex_lock(&vgpu->cache_lock);
entry = __gvt_cache_find_dma_addr(vgpu, dma_addr);
@ -1742,7 +1733,7 @@ void intel_gvt_dma_unmap_guest_page(struct intel_vgpu *vgpu,
{
struct gvt_dma *entry;
if (!vgpu->attached)
if (!test_bit(INTEL_VGPU_STATUS_ATTACHED, vgpu->status))
return;
mutex_lock(&vgpu->cache_lock);
@ -1778,7 +1769,7 @@ static void intel_gvt_test_and_emulate_vblank(struct intel_gvt *gvt)
idr_for_each_entry((&(gvt)->vgpu_idr), (vgpu), (id)) {
if (test_and_clear_bit(INTEL_GVT_REQUEST_EMULATE_VBLANK + id,
(void *)&gvt->service_request)) {
if (vgpu->active)
if (test_bit(INTEL_VGPU_STATUS_ACTIVE, vgpu->status))
intel_vgpu_emulate_vblank(vgpu);
}
}

4
drivers/gpu/drm/i915/gvt/scheduler.c
View File

@ -695,6 +695,7 @@ intel_vgpu_shadow_mm_pin(struct intel_vgpu_workload *workload)
if (workload->shadow_mm->type != INTEL_GVT_MM_PPGTT ||
!workload->shadow_mm->ppgtt_mm.shadowed) {
intel_vgpu_unpin_mm(workload->shadow_mm);
gvt_vgpu_err("workload shadow ppgtt isn't ready\n");
return -EINVAL;
}
@ -865,7 +866,8 @@ pick_next_workload(struct intel_gvt *gvt, struct intel_engine_cs *engine)
goto out;
}
if (!scheduler->current_vgpu->active ||
if (!test_bit(INTEL_VGPU_STATUS_ACTIVE,
scheduler->current_vgpu->status) ||
list_empty(workload_q_head(scheduler->current_vgpu, engine)))
goto out;

12
drivers/gpu/drm/i915/gvt/vgpu.c
View File

@ -166,9 +166,7 @@ void intel_gvt_clean_vgpu_types(struct intel_gvt *gvt)
*/
void intel_gvt_activate_vgpu(struct intel_vgpu *vgpu)
{
mutex_lock(&vgpu->vgpu_lock);
vgpu->active = true;
mutex_unlock(&vgpu->vgpu_lock);
set_bit(INTEL_VGPU_STATUS_ACTIVE, vgpu->status);
}
/**
@ -183,7 +181,7 @@ void intel_gvt_deactivate_vgpu(struct intel_vgpu *vgpu)
{
mutex_lock(&vgpu->vgpu_lock);
vgpu->active = false;
clear_bit(INTEL_VGPU_STATUS_ACTIVE, vgpu->status);
if (atomic_read(&vgpu->submission.running_workload_num)) {
mutex_unlock(&vgpu->vgpu_lock);
@ -228,7 +226,8 @@ void intel_gvt_destroy_vgpu(struct intel_vgpu *vgpu)
struct intel_gvt *gvt = vgpu->gvt;
struct drm_i915_private *i915 = gvt->gt->i915;
drm_WARN(&i915->drm, vgpu->active, "vGPU is still active!\n");
drm_WARN(&i915->drm, test_bit(INTEL_VGPU_STATUS_ACTIVE, vgpu->status),
"vGPU is still active!\n");
/*
* remove idr first so later clean can judge if need to stop
@ -285,8 +284,7 @@ struct intel_vgpu *intel_gvt_create_idle_vgpu(struct intel_gvt *gvt)
if (ret)
goto out_free_vgpu;
vgpu->active = false;
clear_bit(INTEL_VGPU_STATUS_ACTIVE, vgpu->status);
return vgpu;
out_free_vgpu: