drm/i915/gvt: Rework shadow page management code
This is a another big one and the GVT shadow page management code is heavily refined. The new code only use struct intel_vgpu_ppgtt_spt to represent a vgpu shadow page table - w/ or wo/ a guest page associated with. A pure shadow page (no guest page associated) will be used to shadow splited 2M huge gtt. In this case, the spt.guest_page.gfn should be a zero. To search a existed shadow page table, we have two new interfaces: - intel_vgpu_find_spt_by_gfn(), find a spt by guest gfn. It must not be a pure spt. - intel_vgpu_find_spt_by_mfn, Find the spt using shadow page mfn in shadowed PTE. The oos_page management is remained as what is was. v2: Split some changes into small standalone patches. 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
Zhenyu Wang
parent
72f03d7ea1
commit
44b4673380
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@ -593,11 +593,11 @@ static inline int ppgtt_spt_set_entry(
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#define ppgtt_get_guest_entry(spt, e, index) \
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ppgtt_spt_get_entry(spt, NULL, \
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spt->guest_page_type, e, index, true)
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spt->guest_page.type, e, index, true)
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#define ppgtt_set_guest_entry(spt, e, index) \
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ppgtt_spt_set_entry(spt, NULL, \
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spt->guest_page_type, e, index, true)
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spt->guest_page.type, e, index, true)
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#define ppgtt_get_shadow_entry(spt, e, index) \
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ppgtt_spt_get_entry(spt, spt->shadow_page.vaddr, \
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@ -607,52 +607,29 @@ static inline int ppgtt_spt_set_entry(
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ppgtt_spt_set_entry(spt, spt->shadow_page.vaddr, \
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spt->shadow_page.type, e, index, false)
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/**
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* intel_vgpu_init_page_track - init a page track data structure
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* @vgpu: a vGPU
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* @t: a page track data structure
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* @gfn: guest memory page frame number
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* @handler: the function will be called when target guest memory page has
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* been modified.
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*
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* This function is called when a user wants to prepare a page track data
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* structure to track a guest memory page.
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*
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* Returns:
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* Zero on success, negative error code if failed.
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*/
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int intel_vgpu_init_page_track(struct intel_vgpu *vgpu,
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struct intel_vgpu_page_track *t,
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unsigned long gfn,
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int (*handler)(void *, u64, void *, int),
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void *data)
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#define page_track_to_ppgtt_spt(ptr) \
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container_of(ptr, struct intel_vgpu_ppgtt_spt, guest_page.track)
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static void *alloc_spt(gfp_t gfp_mask)
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{
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INIT_HLIST_NODE(&t->node);
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struct intel_vgpu_ppgtt_spt *spt;
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t->tracked = false;
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t->gfn = gfn;
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t->handler = handler;
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t->data = data;
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spt = kzalloc(sizeof(*spt), gfp_mask);
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if (!spt)
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return NULL;
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hash_add(vgpu->gtt.tracked_guest_page_hash_table, &t->node, t->gfn);
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return 0;
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spt->shadow_page.page = alloc_page(gfp_mask);
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if (!spt->shadow_page.page) {
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kfree(spt);
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return NULL;
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}
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return spt;
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}
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/**
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* intel_vgpu_clean_page_track - release a page track data structure
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* @vgpu: a vGPU
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* @t: a page track data structure
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*
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* This function is called before a user frees a page track data structure.
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*/
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void intel_vgpu_clean_page_track(struct intel_vgpu *vgpu,
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struct intel_vgpu_page_track *t)
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static void free_spt(struct intel_vgpu_ppgtt_spt *spt)
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{
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if (!hlist_unhashed(&t->node))
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hash_del(&t->node);
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if (t->tracked)
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intel_gvt_hypervisor_disable_page_track(vgpu, t);
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__free_page(spt->shadow_page.page);
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kfree(spt);
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}
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/**
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@ -679,139 +656,53 @@ struct intel_vgpu_page_track *intel_vgpu_find_tracked_page(
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return NULL;
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}
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static int init_guest_page(struct intel_vgpu *vgpu,
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struct intel_vgpu_guest_page *p,
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unsigned long gfn,
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int (*handler)(void *, u64, void *, int),
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void *data)
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{
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p->oos_page = NULL;
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p->write_cnt = 0;
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return intel_vgpu_init_page_track(vgpu, &p->track, gfn, handler, data);
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}
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static int detach_oos_page(struct intel_vgpu *vgpu,
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struct intel_vgpu_oos_page *oos_page);
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static void clean_guest_page(struct intel_vgpu *vgpu,
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struct intel_vgpu_guest_page *p)
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{
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if (p->oos_page)
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detach_oos_page(vgpu, p->oos_page);
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intel_vgpu_clean_page_track(vgpu, &p->track);
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}
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static inline int init_shadow_page(struct intel_vgpu *vgpu,
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struct intel_vgpu_shadow_page *p, int type, bool hash)
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{
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struct device *kdev = &vgpu->gvt->dev_priv->drm.pdev->dev;
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dma_addr_t daddr;
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daddr = dma_map_page(kdev, p->page, 0, 4096, PCI_DMA_BIDIRECTIONAL);
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if (dma_mapping_error(kdev, daddr)) {
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gvt_vgpu_err("fail to map dma addr\n");
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return -EINVAL;
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}
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p->vaddr = page_address(p->page);
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p->type = type;
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INIT_HLIST_NODE(&p->node);
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p->mfn = daddr >> I915_GTT_PAGE_SHIFT;
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if (hash)
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hash_add(vgpu->gtt.shadow_page_hash_table, &p->node, p->mfn);
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return 0;
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}
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static inline void clean_shadow_page(struct intel_vgpu *vgpu,
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struct intel_vgpu_shadow_page *p)
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{
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struct device *kdev = &vgpu->gvt->dev_priv->drm.pdev->dev;
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dma_unmap_page(kdev, p->mfn << I915_GTT_PAGE_SHIFT, 4096,
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PCI_DMA_BIDIRECTIONAL);
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if (!hlist_unhashed(&p->node))
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hash_del(&p->node);
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}
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static inline struct intel_vgpu_shadow_page *find_shadow_page(
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struct intel_vgpu *vgpu, unsigned long mfn)
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{
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struct intel_vgpu_shadow_page *p;
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hash_for_each_possible(vgpu->gtt.shadow_page_hash_table,
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p, node, mfn) {
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if (p->mfn == mfn)
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return p;
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}
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return NULL;
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}
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#define page_track_to_guest_page(ptr) \
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container_of(ptr, struct intel_vgpu_guest_page, track)
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#define guest_page_to_ppgtt_spt(ptr) \
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container_of(ptr, struct intel_vgpu_ppgtt_spt, guest_page)
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#define shadow_page_to_ppgtt_spt(ptr) \
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container_of(ptr, struct intel_vgpu_ppgtt_spt, shadow_page)
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static void *alloc_spt(gfp_t gfp_mask)
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{
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struct intel_vgpu_ppgtt_spt *spt;
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spt = kzalloc(sizeof(*spt), gfp_mask);
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if (!spt)
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return NULL;
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spt->shadow_page.page = alloc_page(gfp_mask);
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if (!spt->shadow_page.page) {
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kfree(spt);
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return NULL;
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}
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return spt;
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}
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static void free_spt(struct intel_vgpu_ppgtt_spt *spt)
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{
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__free_page(spt->shadow_page.page);
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kfree(spt);
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}
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static void ppgtt_free_shadow_page(struct intel_vgpu_ppgtt_spt *spt)
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{
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trace_spt_free(spt->vgpu->id, spt, spt->shadow_page.type);
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struct device *kdev = &spt->vgpu->gvt->dev_priv->drm.pdev->dev;
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trace_spt_free(spt->vgpu->id, spt, spt->guest_page.type);
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dma_unmap_page(kdev, spt->shadow_page.mfn << I915_GTT_PAGE_SHIFT, 4096,
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PCI_DMA_BIDIRECTIONAL);
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if (!hlist_unhashed(&spt->node))
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hash_del(&spt->node);
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if (spt->guest_page.oos_page)
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detach_oos_page(spt->vgpu, spt->guest_page.oos_page);
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if (!hlist_unhashed(&spt->guest_page.track.node))
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hash_del(&spt->guest_page.track.node);
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if (spt->guest_page.track.tracked)
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intel_gvt_hypervisor_disable_page_track(spt->vgpu,
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&spt->guest_page.track);
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clean_shadow_page(spt->vgpu, &spt->shadow_page);
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clean_guest_page(spt->vgpu, &spt->guest_page);
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list_del_init(&spt->post_shadow_list);
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free_spt(spt);
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}
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static void ppgtt_free_all_shadow_page(struct intel_vgpu *vgpu)
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{
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struct hlist_node *n;
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struct intel_vgpu_shadow_page *sp;
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struct intel_vgpu_ppgtt_spt *spt;
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int i;
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hash_for_each_safe(vgpu->gtt.shadow_page_hash_table, i, n, sp, node)
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ppgtt_free_shadow_page(shadow_page_to_ppgtt_spt(sp));
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hash_for_each_safe(vgpu->gtt.shadow_page_hash_table, i, n, spt, node)
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ppgtt_free_shadow_page(spt);
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}
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static int ppgtt_handle_guest_write_page_table_bytes(
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struct intel_vgpu_guest_page *gpt,
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struct intel_vgpu_ppgtt_spt *spt,
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u64 pa, void *p_data, int bytes);
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static int ppgtt_write_protection_handler(void *data, u64 pa,
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void *p_data, int bytes)
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{
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struct intel_vgpu_page_track *t = data;
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struct intel_vgpu_guest_page *p = page_track_to_guest_page(t);
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struct intel_vgpu_ppgtt_spt *spt = page_track_to_ppgtt_spt(t);
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int ret;
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if (bytes != 4 && bytes != 8)
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@ -820,20 +711,47 @@ static int ppgtt_write_protection_handler(void *data, u64 pa,
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if (!t->tracked)
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return -EINVAL;
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ret = ppgtt_handle_guest_write_page_table_bytes(p,
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ret = ppgtt_handle_guest_write_page_table_bytes(spt,
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pa, p_data, bytes);
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if (ret)
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return ret;
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return ret;
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}
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/* Find a spt by guest gfn. */
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static struct intel_vgpu_ppgtt_spt *intel_vgpu_find_spt_by_gfn(
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struct intel_vgpu *vgpu, unsigned long gfn)
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{
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struct intel_vgpu_page_track *track;
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track = intel_vgpu_find_tracked_page(vgpu, gfn);
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if (track)
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return page_track_to_ppgtt_spt(track);
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return NULL;
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}
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/* Find the spt by shadow page mfn. */
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static struct intel_vgpu_ppgtt_spt *intel_vgpu_find_spt_by_mfn(
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struct intel_vgpu *vgpu, unsigned long mfn)
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{
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struct intel_vgpu_ppgtt_spt *spt;
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hash_for_each_possible(vgpu->gtt.shadow_page_hash_table, spt, node, mfn) {
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if (spt->shadow_page.mfn == mfn)
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return spt;
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}
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return NULL;
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}
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static int reclaim_one_ppgtt_mm(struct intel_gvt *gvt);
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static struct intel_vgpu_ppgtt_spt *ppgtt_alloc_shadow_page(
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struct intel_vgpu *vgpu, int type, unsigned long gfn)
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{
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struct device *kdev = &vgpu->gvt->dev_priv->drm.pdev->dev;
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struct intel_vgpu_ppgtt_spt *spt = NULL;
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int ret;
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dma_addr_t daddr;
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retry:
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spt = alloc_spt(GFP_KERNEL | __GFP_ZERO);
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@ -846,44 +764,39 @@ static struct intel_vgpu_ppgtt_spt *ppgtt_alloc_shadow_page(
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}
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spt->vgpu = vgpu;
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spt->guest_page_type = type;
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atomic_set(&spt->refcount, 1);
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INIT_LIST_HEAD(&spt->post_shadow_list);
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/*
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* TODO: guest page type may be different with shadow page type,
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* when we support PSE page in future.
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* Init shadow_page.
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*/
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ret = init_shadow_page(vgpu, &spt->shadow_page, type, true);
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if (ret) {
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gvt_vgpu_err("fail to initialize shadow page for spt\n");
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goto err;
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spt->shadow_page.type = type;
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daddr = dma_map_page(kdev, spt->shadow_page.page,
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0, 4096, PCI_DMA_BIDIRECTIONAL);
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if (dma_mapping_error(kdev, daddr)) {
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gvt_vgpu_err("fail to map dma addr\n");
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free_spt(spt);
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return ERR_PTR(-EINVAL);
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}
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spt->shadow_page.vaddr = page_address(spt->shadow_page.page);
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spt->shadow_page.mfn = daddr >> I915_GTT_PAGE_SHIFT;
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ret = init_guest_page(vgpu, &spt->guest_page,
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gfn, ppgtt_write_protection_handler, NULL);
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if (ret) {
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gvt_vgpu_err("fail to initialize guest page for spt\n");
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goto err;
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}
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/*
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* Init guest_page.
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*/
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spt->guest_page.type = type;
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spt->guest_page.gfn = gfn;
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spt->guest_page.track.gfn = gfn;
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spt->guest_page.track.handler = ppgtt_write_protection_handler;
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hash_add(vgpu->gtt.tracked_guest_page_hash_table,
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&spt->guest_page.track.node, gfn);
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INIT_HLIST_NODE(&spt->node);
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hash_add(vgpu->gtt.shadow_page_hash_table, &spt->node, spt->shadow_page.mfn);
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trace_spt_alloc(vgpu->id, spt, type, spt->shadow_page.mfn, gfn);
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return spt;
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err:
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ppgtt_free_shadow_page(spt);
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return ERR_PTR(ret);
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}
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static struct intel_vgpu_ppgtt_spt *ppgtt_find_shadow_page(
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struct intel_vgpu *vgpu, unsigned long mfn)
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{
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struct intel_vgpu_shadow_page *p = find_shadow_page(vgpu, mfn);
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if (p)
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return shadow_page_to_ppgtt_spt(p);
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gvt_vgpu_err("fail to find ppgtt shadow page: 0x%lx\n", mfn);
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return NULL;
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}
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#define pt_entry_size_shift(spt) \
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@ -929,7 +842,7 @@ static int ppgtt_invalidate_shadow_page_by_shadow_entry(struct intel_vgpu *vgpu,
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vgpu->gtt.scratch_pt[cur_pt_type].page_mfn)
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return 0;
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}
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s = ppgtt_find_shadow_page(vgpu, ops->get_pfn(e));
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s = intel_vgpu_find_spt_by_mfn(vgpu, ops->get_pfn(e));
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if (!s) {
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gvt_vgpu_err("fail to find shadow page: mfn: 0x%lx\n",
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ops->get_pfn(e));
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@ -947,7 +860,7 @@ static int ppgtt_invalidate_shadow_page(struct intel_vgpu_ppgtt_spt *spt)
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int v = atomic_read(&spt->refcount);
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trace_spt_change(spt->vgpu->id, "die", spt,
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spt->guest_page.track.gfn, spt->shadow_page.type);
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spt->guest_page.gfn, spt->shadow_page.type);
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trace_spt_refcount(spt->vgpu->id, "dec", spt, v, (v - 1));
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@ -981,7 +894,7 @@ static int ppgtt_invalidate_shadow_page(struct intel_vgpu_ppgtt_spt *spt)
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}
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release:
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trace_spt_change(spt->vgpu->id, "release", spt,
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spt->guest_page.track.gfn, spt->shadow_page.type);
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spt->guest_page.gfn, spt->shadow_page.type);
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ppgtt_free_shadow_page(spt);
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return 0;
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fail:
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@ -996,43 +909,38 @@ static struct intel_vgpu_ppgtt_spt *ppgtt_populate_shadow_page_by_guest_entry(
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struct intel_vgpu *vgpu, struct intel_gvt_gtt_entry *we)
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{
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struct intel_gvt_gtt_pte_ops *ops = vgpu->gvt->gtt.pte_ops;
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struct intel_vgpu_ppgtt_spt *s = NULL;
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struct intel_vgpu_guest_page *g;
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struct intel_vgpu_page_track *t;
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struct intel_vgpu_ppgtt_spt *spt = NULL;
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int ret;
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GEM_BUG_ON(!gtt_type_is_pt(get_next_pt_type(we->type)));
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t = intel_vgpu_find_tracked_page(vgpu, ops->get_pfn(we));
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if (t) {
|
||||
g = page_track_to_guest_page(t);
|
||||
s = guest_page_to_ppgtt_spt(g);
|
||||
ppgtt_get_shadow_page(s);
|
||||
} else {
|
||||
spt = intel_vgpu_find_spt_by_gfn(vgpu, ops->get_pfn(we));
|
||||
if (spt)
|
||||
ppgtt_get_shadow_page(spt);
|
||||
else {
|
||||
int type = get_next_pt_type(we->type);
|
||||
|
||||
s = ppgtt_alloc_shadow_page(vgpu, type, ops->get_pfn(we));
|
||||
if (IS_ERR(s)) {
|
||||
ret = PTR_ERR(s);
|
||||
spt = ppgtt_alloc_shadow_page(vgpu, type, ops->get_pfn(we));
|
||||
if (IS_ERR(spt)) {
|
||||
ret = PTR_ERR(spt);
|
||||
goto fail;
|
||||
}
|
||||
|
||||
ret = intel_gvt_hypervisor_enable_page_track(vgpu,
|
||||
&s->guest_page.track);
|
||||
ret = intel_gvt_hypervisor_enable_page_track(vgpu, &spt->guest_page.track);
|
||||
if (ret)
|
||||
goto fail;
|
||||
|
||||
ret = ppgtt_populate_shadow_page(s);
|
||||
ret = ppgtt_populate_shadow_page(spt);
|
||||
if (ret)
|
||||
goto fail;
|
||||
|
||||
trace_spt_change(vgpu->id, "new", s, s->guest_page.track.gfn,
|
||||
s->shadow_page.type);
|
||||
trace_spt_change(vgpu->id, "new", spt, spt->guest_page.gfn,
|
||||
spt->shadow_page.type);
|
||||
}
|
||||
return s;
|
||||
return spt;
|
||||
fail:
|
||||
gvt_vgpu_err("fail: shadow page %p guest entry 0x%llx type %d\n",
|
||||
s, we->val64, we->type);
|
||||
spt, we->val64, we->type);
|
||||
return ERR_PTR(ret);
|
||||
}
|
||||
|
||||
|
|
@ -1097,8 +1005,7 @@ static int ppgtt_populate_shadow_page(struct intel_vgpu_ppgtt_spt *spt)
|
|||
|
||||
for_each_present_guest_entry(spt, &ge, i) {
|
||||
if (gtt_type_is_pt(get_next_pt_type(ge.type))) {
|
||||
s = ppgtt_populate_shadow_page_by_guest_entry(vgpu,
|
||||
&ge);
|
||||
s = ppgtt_populate_shadow_page_by_guest_entry(vgpu, &ge);
|
||||
if (IS_ERR(s)) {
|
||||
ret = PTR_ERR(s);
|
||||
goto fail;
|
||||
|
|
@ -1126,17 +1033,15 @@ static int ppgtt_populate_shadow_page(struct intel_vgpu_ppgtt_spt *spt)
|
|||
return ret;
|
||||
}
|
||||
|
||||
static int ppgtt_handle_guest_entry_removal(struct intel_vgpu_guest_page *gpt,
|
||||
static int ppgtt_handle_guest_entry_removal(struct intel_vgpu_ppgtt_spt *spt,
|
||||
struct intel_gvt_gtt_entry *se, unsigned long index)
|
||||
{
|
||||
struct intel_vgpu_ppgtt_spt *spt = guest_page_to_ppgtt_spt(gpt);
|
||||
struct intel_vgpu_shadow_page *sp = &spt->shadow_page;
|
||||
struct intel_vgpu *vgpu = spt->vgpu;
|
||||
struct intel_gvt_gtt_pte_ops *ops = vgpu->gvt->gtt.pte_ops;
|
||||
int ret;
|
||||
|
||||
trace_gpt_change(spt->vgpu->id, "remove", spt, sp->type, se->val64,
|
||||
index);
|
||||
trace_spt_guest_change(spt->vgpu->id, "remove", spt,
|
||||
spt->shadow_page.type, se->val64, index);
|
||||
|
||||
gvt_vdbg_mm("destroy old shadow entry, type %d, index %lu, value %llx\n",
|
||||
se->type, index, se->val64);
|
||||
|
|
@ -1144,12 +1049,13 @@ static int ppgtt_handle_guest_entry_removal(struct intel_vgpu_guest_page *gpt,
|
|||
if (!ops->test_present(se))
|
||||
return 0;
|
||||
|
||||
if (ops->get_pfn(se) == vgpu->gtt.scratch_pt[sp->type].page_mfn)
|
||||
if (ops->get_pfn(se) ==
|
||||
vgpu->gtt.scratch_pt[spt->shadow_page.type].page_mfn)
|
||||
return 0;
|
||||
|
||||
if (gtt_type_is_pt(get_next_pt_type(se->type))) {
|
||||
struct intel_vgpu_ppgtt_spt *s =
|
||||
ppgtt_find_shadow_page(vgpu, ops->get_pfn(se));
|
||||
intel_vgpu_find_spt_by_mfn(vgpu, ops->get_pfn(se));
|
||||
if (!s) {
|
||||
gvt_vgpu_err("fail to find guest page\n");
|
||||
ret = -ENXIO;
|
||||
|
|
@ -1166,18 +1072,16 @@ static int ppgtt_handle_guest_entry_removal(struct intel_vgpu_guest_page *gpt,
|
|||
return ret;
|
||||
}
|
||||
|
||||
static int ppgtt_handle_guest_entry_add(struct intel_vgpu_guest_page *gpt,
|
||||
static int ppgtt_handle_guest_entry_add(struct intel_vgpu_ppgtt_spt *spt,
|
||||
struct intel_gvt_gtt_entry *we, unsigned long index)
|
||||
{
|
||||
struct intel_vgpu_ppgtt_spt *spt = guest_page_to_ppgtt_spt(gpt);
|
||||
struct intel_vgpu_shadow_page *sp = &spt->shadow_page;
|
||||
struct intel_vgpu *vgpu = spt->vgpu;
|
||||
struct intel_gvt_gtt_entry m;
|
||||
struct intel_vgpu_ppgtt_spt *s;
|
||||
int ret;
|
||||
|
||||
trace_gpt_change(spt->vgpu->id, "add", spt, sp->type,
|
||||
we->val64, index);
|
||||
trace_spt_guest_change(spt->vgpu->id, "add", spt, spt->shadow_page.type,
|
||||
we->val64, index);
|
||||
|
||||
gvt_vdbg_mm("add shadow entry: type %d, index %lu, value %llx\n",
|
||||
we->type, index, we->val64);
|
||||
|
|
@ -1209,30 +1113,29 @@ static int sync_oos_page(struct intel_vgpu *vgpu,
|
|||
const struct intel_gvt_device_info *info = &vgpu->gvt->device_info;
|
||||
struct intel_gvt *gvt = vgpu->gvt;
|
||||
struct intel_gvt_gtt_pte_ops *ops = gvt->gtt.pte_ops;
|
||||
struct intel_vgpu_ppgtt_spt *spt =
|
||||
guest_page_to_ppgtt_spt(oos_page->guest_page);
|
||||
struct intel_vgpu_ppgtt_spt *spt = oos_page->spt;
|
||||
struct intel_gvt_gtt_entry old, new;
|
||||
int index;
|
||||
int ret;
|
||||
|
||||
trace_oos_change(vgpu->id, "sync", oos_page->id,
|
||||
oos_page->guest_page, spt->guest_page_type);
|
||||
spt, spt->guest_page.type);
|
||||
|
||||
old.type = new.type = get_entry_type(spt->guest_page_type);
|
||||
old.type = new.type = get_entry_type(spt->guest_page.type);
|
||||
old.val64 = new.val64 = 0;
|
||||
|
||||
for (index = 0; index < (I915_GTT_PAGE_SIZE >>
|
||||
info->gtt_entry_size_shift); index++) {
|
||||
ops->get_entry(oos_page->mem, &old, index, false, 0, vgpu);
|
||||
ops->get_entry(NULL, &new, index, true,
|
||||
oos_page->guest_page->track.gfn << PAGE_SHIFT, vgpu);
|
||||
spt->guest_page.gfn << PAGE_SHIFT, vgpu);
|
||||
|
||||
if (old.val64 == new.val64
|
||||
&& !test_and_clear_bit(index, spt->post_shadow_bitmap))
|
||||
continue;
|
||||
|
||||
trace_oos_sync(vgpu->id, oos_page->id,
|
||||
oos_page->guest_page, spt->guest_page_type,
|
||||
spt, spt->guest_page.type,
|
||||
new.val64, index);
|
||||
|
||||
ret = ppgtt_populate_shadow_entry(vgpu, spt, index, &new);
|
||||
|
|
@ -1242,7 +1145,7 @@ static int sync_oos_page(struct intel_vgpu *vgpu,
|
|||
ops->set_entry(oos_page->mem, &new, index, false, 0, vgpu);
|
||||
}
|
||||
|
||||
oos_page->guest_page->write_cnt = 0;
|
||||
spt->guest_page.write_cnt = 0;
|
||||
list_del_init(&spt->post_shadow_list);
|
||||
return 0;
|
||||
}
|
||||
|
|
@ -1251,15 +1154,14 @@ static int detach_oos_page(struct intel_vgpu *vgpu,
|
|||
struct intel_vgpu_oos_page *oos_page)
|
||||
{
|
||||
struct intel_gvt *gvt = vgpu->gvt;
|
||||
struct intel_vgpu_ppgtt_spt *spt =
|
||||
guest_page_to_ppgtt_spt(oos_page->guest_page);
|
||||
struct intel_vgpu_ppgtt_spt *spt = oos_page->spt;
|
||||
|
||||
trace_oos_change(vgpu->id, "detach", oos_page->id,
|
||||
oos_page->guest_page, spt->guest_page_type);
|
||||
spt, spt->guest_page.type);
|
||||
|
||||
oos_page->guest_page->write_cnt = 0;
|
||||
oos_page->guest_page->oos_page = NULL;
|
||||
oos_page->guest_page = NULL;
|
||||
spt->guest_page.write_cnt = 0;
|
||||
spt->guest_page.oos_page = NULL;
|
||||
oos_page->spt = NULL;
|
||||
|
||||
list_del_init(&oos_page->vm_list);
|
||||
list_move_tail(&oos_page->list, &gvt->gtt.oos_page_free_list_head);
|
||||
|
|
@ -1267,51 +1169,49 @@ static int detach_oos_page(struct intel_vgpu *vgpu,
|
|||
return 0;
|
||||
}
|
||||
|
||||
static int attach_oos_page(struct intel_vgpu *vgpu,
|
||||
struct intel_vgpu_oos_page *oos_page,
|
||||
struct intel_vgpu_guest_page *gpt)
|
||||
static int attach_oos_page(struct intel_vgpu_oos_page *oos_page,
|
||||
struct intel_vgpu_ppgtt_spt *spt)
|
||||
{
|
||||
struct intel_gvt *gvt = vgpu->gvt;
|
||||
struct intel_gvt *gvt = spt->vgpu->gvt;
|
||||
int ret;
|
||||
|
||||
ret = intel_gvt_hypervisor_read_gpa(vgpu,
|
||||
gpt->track.gfn << I915_GTT_PAGE_SHIFT,
|
||||
ret = intel_gvt_hypervisor_read_gpa(spt->vgpu,
|
||||
spt->guest_page.gfn << I915_GTT_PAGE_SHIFT,
|
||||
oos_page->mem, I915_GTT_PAGE_SIZE);
|
||||
if (ret)
|
||||
return ret;
|
||||
|
||||
oos_page->guest_page = gpt;
|
||||
gpt->oos_page = oos_page;
|
||||
oos_page->spt = spt;
|
||||
spt->guest_page.oos_page = oos_page;
|
||||
|
||||
list_move_tail(&oos_page->list, &gvt->gtt.oos_page_use_list_head);
|
||||
|
||||
trace_oos_change(vgpu->id, "attach", gpt->oos_page->id,
|
||||
gpt, guest_page_to_ppgtt_spt(gpt)->guest_page_type);
|
||||
trace_oos_change(spt->vgpu->id, "attach", oos_page->id,
|
||||
spt, spt->guest_page.type);
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int ppgtt_set_guest_page_sync(struct intel_vgpu *vgpu,
|
||||
struct intel_vgpu_guest_page *gpt)
|
||||
static int ppgtt_set_guest_page_sync(struct intel_vgpu_ppgtt_spt *spt)
|
||||
{
|
||||
struct intel_vgpu_oos_page *oos_page = spt->guest_page.oos_page;
|
||||
int ret;
|
||||
|
||||
ret = intel_gvt_hypervisor_enable_page_track(vgpu, &gpt->track);
|
||||
ret = intel_gvt_hypervisor_enable_page_track(spt->vgpu, &spt->guest_page.track);
|
||||
if (ret)
|
||||
return ret;
|
||||
|
||||
trace_oos_change(vgpu->id, "set page sync", gpt->oos_page->id,
|
||||
gpt, guest_page_to_ppgtt_spt(gpt)->guest_page_type);
|
||||
trace_oos_change(spt->vgpu->id, "set page sync", oos_page->id,
|
||||
spt, spt->guest_page.type);
|
||||
|
||||
list_del_init(&gpt->oos_page->vm_list);
|
||||
return sync_oos_page(vgpu, gpt->oos_page);
|
||||
list_del_init(&oos_page->vm_list);
|
||||
return sync_oos_page(spt->vgpu, oos_page);
|
||||
}
|
||||
|
||||
static int ppgtt_allocate_oos_page(struct intel_vgpu *vgpu,
|
||||
struct intel_vgpu_guest_page *gpt)
|
||||
static int ppgtt_allocate_oos_page(struct intel_vgpu_ppgtt_spt *spt)
|
||||
{
|
||||
struct intel_gvt *gvt = vgpu->gvt;
|
||||
struct intel_gvt *gvt = spt->vgpu->gvt;
|
||||
struct intel_gvt_gtt *gtt = &gvt->gtt;
|
||||
struct intel_vgpu_oos_page *oos_page = gpt->oos_page;
|
||||
struct intel_vgpu_oos_page *oos_page = spt->guest_page.oos_page;
|
||||
int ret;
|
||||
|
||||
WARN(oos_page, "shadow PPGTT page has already has a oos page\n");
|
||||
|
|
@ -1319,31 +1219,30 @@ static int ppgtt_allocate_oos_page(struct intel_vgpu *vgpu,
|
|||
if (list_empty(>t->oos_page_free_list_head)) {
|
||||
oos_page = container_of(gtt->oos_page_use_list_head.next,
|
||||
struct intel_vgpu_oos_page, list);
|
||||
ret = ppgtt_set_guest_page_sync(vgpu, oos_page->guest_page);
|
||||
ret = ppgtt_set_guest_page_sync(oos_page->spt);
|
||||
if (ret)
|
||||
return ret;
|
||||
ret = detach_oos_page(vgpu, oos_page);
|
||||
ret = detach_oos_page(spt->vgpu, oos_page);
|
||||
if (ret)
|
||||
return ret;
|
||||
} else
|
||||
oos_page = container_of(gtt->oos_page_free_list_head.next,
|
||||
struct intel_vgpu_oos_page, list);
|
||||
return attach_oos_page(vgpu, oos_page, gpt);
|
||||
return attach_oos_page(oos_page, spt);
|
||||
}
|
||||
|
||||
static int ppgtt_set_guest_page_oos(struct intel_vgpu *vgpu,
|
||||
struct intel_vgpu_guest_page *gpt)
|
||||
static int ppgtt_set_guest_page_oos(struct intel_vgpu_ppgtt_spt *spt)
|
||||
{
|
||||
struct intel_vgpu_oos_page *oos_page = gpt->oos_page;
|
||||
struct intel_vgpu_oos_page *oos_page = spt->guest_page.oos_page;
|
||||
|
||||
if (WARN(!oos_page, "shadow PPGTT page should have a oos page\n"))
|
||||
return -EINVAL;
|
||||
|
||||
trace_oos_change(vgpu->id, "set page out of sync", gpt->oos_page->id,
|
||||
gpt, guest_page_to_ppgtt_spt(gpt)->guest_page_type);
|
||||
trace_oos_change(spt->vgpu->id, "set page out of sync", oos_page->id,
|
||||
spt, spt->guest_page.type);
|
||||
|
||||
list_add_tail(&oos_page->vm_list, &vgpu->gtt.oos_page_list_head);
|
||||
return intel_gvt_hypervisor_disable_page_track(vgpu, &gpt->track);
|
||||
list_add_tail(&oos_page->vm_list, &spt->vgpu->gtt.oos_page_list_head);
|
||||
return intel_gvt_hypervisor_disable_page_track(spt->vgpu, &spt->guest_page.track);
|
||||
}
|
||||
|
||||
/**
|
||||
|
|
@ -1368,7 +1267,7 @@ int intel_vgpu_sync_oos_pages(struct intel_vgpu *vgpu)
|
|||
list_for_each_safe(pos, n, &vgpu->gtt.oos_page_list_head) {
|
||||
oos_page = container_of(pos,
|
||||
struct intel_vgpu_oos_page, vm_list);
|
||||
ret = ppgtt_set_guest_page_sync(vgpu, oos_page->guest_page);
|
||||
ret = ppgtt_set_guest_page_sync(oos_page->spt);
|
||||
if (ret)
|
||||
return ret;
|
||||
}
|
||||
|
|
@ -1379,10 +1278,9 @@ int intel_vgpu_sync_oos_pages(struct intel_vgpu *vgpu)
|
|||
* The heart of PPGTT shadow page table.
|
||||
*/
|
||||
static int ppgtt_handle_guest_write_page_table(
|
||||
struct intel_vgpu_guest_page *gpt,
|
||||
struct intel_vgpu_ppgtt_spt *spt,
|
||||
struct intel_gvt_gtt_entry *we, unsigned long index)
|
||||
{
|
||||
struct intel_vgpu_ppgtt_spt *spt = guest_page_to_ppgtt_spt(gpt);
|
||||
struct intel_vgpu *vgpu = spt->vgpu;
|
||||
int type = spt->shadow_page.type;
|
||||
struct intel_gvt_gtt_pte_ops *ops = vgpu->gvt->gtt.pte_ops;
|
||||
|
|
@ -1400,12 +1298,12 @@ static int ppgtt_handle_guest_write_page_table(
|
|||
ppgtt_get_shadow_entry(spt, &old_se, index);
|
||||
|
||||
if (new_present) {
|
||||
ret = ppgtt_handle_guest_entry_add(gpt, we, index);
|
||||
ret = ppgtt_handle_guest_entry_add(spt, we, index);
|
||||
if (ret)
|
||||
goto fail;
|
||||
}
|
||||
|
||||
ret = ppgtt_handle_guest_entry_removal(gpt, &old_se, index);
|
||||
ret = ppgtt_handle_guest_entry_removal(spt, &old_se, index);
|
||||
if (ret)
|
||||
goto fail;
|
||||
|
||||
|
|
@ -1423,12 +1321,11 @@ static int ppgtt_handle_guest_write_page_table(
|
|||
|
||||
|
||||
|
||||
static inline bool can_do_out_of_sync(struct intel_vgpu_guest_page *gpt)
|
||||
static inline bool can_do_out_of_sync(struct intel_vgpu_ppgtt_spt *spt)
|
||||
{
|
||||
return enable_out_of_sync
|
||||
&& gtt_type_is_pte_pt(
|
||||
guest_page_to_ppgtt_spt(gpt)->guest_page_type)
|
||||
&& gpt->write_cnt >= 2;
|
||||
&& gtt_type_is_pte_pt(spt->guest_page.type)
|
||||
&& spt->guest_page.write_cnt >= 2;
|
||||
}
|
||||
|
||||
static void ppgtt_set_post_shadow(struct intel_vgpu_ppgtt_spt *spt,
|
||||
|
|
@ -1468,8 +1365,8 @@ int intel_vgpu_flush_post_shadow(struct intel_vgpu *vgpu)
|
|||
GTT_ENTRY_NUM_IN_ONE_PAGE) {
|
||||
ppgtt_get_guest_entry(spt, &ge, index);
|
||||
|
||||
ret = ppgtt_handle_guest_write_page_table(
|
||||
&spt->guest_page, &ge, index);
|
||||
ret = ppgtt_handle_guest_write_page_table(spt,
|
||||
&ge, index);
|
||||
if (ret)
|
||||
return ret;
|
||||
clear_bit(index, spt->post_shadow_bitmap);
|
||||
|
|
@ -1480,10 +1377,9 @@ int intel_vgpu_flush_post_shadow(struct intel_vgpu *vgpu)
|
|||
}
|
||||
|
||||
static int ppgtt_handle_guest_write_page_table_bytes(
|
||||
struct intel_vgpu_guest_page *gpt,
|
||||
struct intel_vgpu_ppgtt_spt *spt,
|
||||
u64 pa, void *p_data, int bytes)
|
||||
{
|
||||
struct intel_vgpu_ppgtt_spt *spt = guest_page_to_ppgtt_spt(gpt);
|
||||
struct intel_vgpu *vgpu = spt->vgpu;
|
||||
struct intel_gvt_gtt_pte_ops *ops = vgpu->gvt->gtt.pte_ops;
|
||||
const struct intel_gvt_device_info *info = &vgpu->gvt->device_info;
|
||||
|
|
@ -1498,7 +1394,7 @@ static int ppgtt_handle_guest_write_page_table_bytes(
|
|||
ops->test_pse(&we);
|
||||
|
||||
if (bytes == info->gtt_entry_size) {
|
||||
ret = ppgtt_handle_guest_write_page_table(gpt, &we, index);
|
||||
ret = ppgtt_handle_guest_write_page_table(spt, &we, index);
|
||||
if (ret)
|
||||
return ret;
|
||||
} else {
|
||||
|
|
@ -1506,7 +1402,7 @@ static int ppgtt_handle_guest_write_page_table_bytes(
|
|||
int type = spt->shadow_page.type;
|
||||
|
||||
ppgtt_get_shadow_entry(spt, &se, index);
|
||||
ret = ppgtt_handle_guest_entry_removal(gpt, &se, index);
|
||||
ret = ppgtt_handle_guest_entry_removal(spt, &se, index);
|
||||
if (ret)
|
||||
return ret;
|
||||
ops->set_pfn(&se, vgpu->gtt.scratch_pt[type].page_mfn);
|
||||
|
|
@ -1518,17 +1414,17 @@ static int ppgtt_handle_guest_write_page_table_bytes(
|
|||
if (!enable_out_of_sync)
|
||||
return 0;
|
||||
|
||||
gpt->write_cnt++;
|
||||
spt->guest_page.write_cnt++;
|
||||
|
||||
if (gpt->oos_page)
|
||||
ops->set_entry(gpt->oos_page->mem, &we, index,
|
||||
if (spt->guest_page.oos_page)
|
||||
ops->set_entry(spt->guest_page.oos_page->mem, &we, index,
|
||||
false, 0, vgpu);
|
||||
|
||||
if (can_do_out_of_sync(gpt)) {
|
||||
if (!gpt->oos_page)
|
||||
ppgtt_allocate_oos_page(vgpu, gpt);
|
||||
if (can_do_out_of_sync(spt)) {
|
||||
if (!spt->guest_page.oos_page)
|
||||
ppgtt_allocate_oos_page(spt);
|
||||
|
||||
ret = ppgtt_set_guest_page_oos(vgpu, gpt);
|
||||
ret = ppgtt_set_guest_page_oos(spt);
|
||||
if (ret < 0)
|
||||
return ret;
|
||||
}
|
||||
|
|
@ -1557,8 +1453,8 @@ static void invalidate_ppgtt_mm(struct intel_vgpu_mm *mm)
|
|||
se.val64 = 0;
|
||||
ppgtt_set_shadow_root_entry(mm, &se, index);
|
||||
|
||||
trace_gpt_change(vgpu->id, "destroy root pointer",
|
||||
NULL, se.type, se.val64, index);
|
||||
trace_spt_guest_change(vgpu->id, "destroy root pointer",
|
||||
NULL, se.type, se.val64, index);
|
||||
}
|
||||
|
||||
mm->ppgtt_mm.shadowed = false;
|
||||
|
|
@ -1586,8 +1482,8 @@ static int shadow_ppgtt_mm(struct intel_vgpu_mm *mm)
|
|||
if (!ops->test_present(&ge))
|
||||
continue;
|
||||
|
||||
trace_gpt_change(vgpu->id, __func__, NULL,
|
||||
ge.type, ge.val64, index);
|
||||
trace_spt_guest_change(vgpu->id, __func__, NULL,
|
||||
ge.type, ge.val64, index);
|
||||
|
||||
spt = ppgtt_populate_shadow_page_by_guest_entry(vgpu, &ge);
|
||||
if (IS_ERR(spt)) {
|
||||
|
|
@ -1598,8 +1494,8 @@ static int shadow_ppgtt_mm(struct intel_vgpu_mm *mm)
|
|||
ppgtt_generate_shadow_entry(&se, spt, &ge);
|
||||
ppgtt_set_shadow_root_entry(mm, &se, index);
|
||||
|
||||
trace_gpt_change(vgpu->id, "populate root pointer",
|
||||
NULL, se.type, se.val64, index);
|
||||
trace_spt_guest_change(vgpu->id, "populate root pointer",
|
||||
NULL, se.type, se.val64, index);
|
||||
}
|
||||
|
||||
return 0;
|
||||
|
|
@ -1793,7 +1689,7 @@ static inline int ppgtt_get_next_level_entry(struct intel_vgpu_mm *mm,
|
|||
struct intel_gvt_gtt_pte_ops *ops = vgpu->gvt->gtt.pte_ops;
|
||||
struct intel_vgpu_ppgtt_spt *s;
|
||||
|
||||
s = ppgtt_find_shadow_page(vgpu, ops->get_pfn(e));
|
||||
s = intel_vgpu_find_spt_by_mfn(vgpu, ops->get_pfn(e));
|
||||
if (!s)
|
||||
return -ENXIO;
|
||||
|
||||
|
|
@ -2030,7 +1926,7 @@ int intel_vgpu_write_protect_handler(struct intel_vgpu *vgpu, u64 pa,
|
|||
if (t) {
|
||||
if (unlikely(vgpu->failsafe)) {
|
||||
/* remove write protection to prevent furture traps */
|
||||
intel_vgpu_clean_page_track(vgpu, t);
|
||||
intel_gvt_hypervisor_disable_page_track(vgpu, t);
|
||||
} else {
|
||||
ret = t->handler(t, pa, p_data, bytes);
|
||||
if (ret) {
|
||||
|
|
|
|||
|
|
@ -205,16 +205,6 @@ extern void intel_gvt_clean_gtt(struct intel_gvt *gvt);
|
|||
extern struct intel_vgpu_mm *intel_gvt_find_ppgtt_mm(struct intel_vgpu *vgpu,
|
||||
int page_table_level, void *root_entry);
|
||||
|
||||
struct intel_vgpu_oos_page;
|
||||
|
||||
struct intel_vgpu_shadow_page {
|
||||
void *vaddr;
|
||||
struct page *page;
|
||||
int type;
|
||||
struct hlist_node node;
|
||||
unsigned long mfn;
|
||||
};
|
||||
|
||||
struct intel_vgpu_page_track {
|
||||
struct hlist_node node;
|
||||
bool tracked;
|
||||
|
|
@ -223,14 +213,8 @@ struct intel_vgpu_page_track {
|
|||
void *data;
|
||||
};
|
||||
|
||||
struct intel_vgpu_guest_page {
|
||||
struct intel_vgpu_page_track track;
|
||||
unsigned long write_cnt;
|
||||
struct intel_vgpu_oos_page *oos_page;
|
||||
};
|
||||
|
||||
struct intel_vgpu_oos_page {
|
||||
struct intel_vgpu_guest_page *guest_page;
|
||||
struct intel_vgpu_ppgtt_spt *spt;
|
||||
struct list_head list;
|
||||
struct list_head vm_list;
|
||||
int id;
|
||||
|
|
@ -239,28 +223,31 @@ struct intel_vgpu_oos_page {
|
|||
|
||||
#define GTT_ENTRY_NUM_IN_ONE_PAGE 512
|
||||
|
||||
/* Represent a vgpu shadow page table. */
|
||||
struct intel_vgpu_ppgtt_spt {
|
||||
struct intel_vgpu_shadow_page shadow_page;
|
||||
struct intel_vgpu_guest_page guest_page;
|
||||
int guest_page_type;
|
||||
atomic_t refcount;
|
||||
struct intel_vgpu *vgpu;
|
||||
struct hlist_node node;
|
||||
|
||||
struct {
|
||||
intel_gvt_gtt_type_t type;
|
||||
void *vaddr;
|
||||
struct page *page;
|
||||
unsigned long mfn;
|
||||
} shadow_page;
|
||||
|
||||
struct {
|
||||
intel_gvt_gtt_type_t type;
|
||||
unsigned long gfn;
|
||||
unsigned long write_cnt;
|
||||
struct intel_vgpu_page_track track;
|
||||
struct intel_vgpu_oos_page *oos_page;
|
||||
} guest_page;
|
||||
|
||||
DECLARE_BITMAP(post_shadow_bitmap, GTT_ENTRY_NUM_IN_ONE_PAGE);
|
||||
struct list_head post_shadow_list;
|
||||
};
|
||||
|
||||
int intel_vgpu_init_page_track(struct intel_vgpu *vgpu,
|
||||
struct intel_vgpu_page_track *t,
|
||||
unsigned long gfn,
|
||||
int (*handler)(void *gp, u64, void *, int),
|
||||
void *data);
|
||||
|
||||
void intel_vgpu_clean_page_track(struct intel_vgpu *vgpu,
|
||||
struct intel_vgpu_page_track *t);
|
||||
|
||||
struct intel_vgpu_page_track *intel_vgpu_find_tracked_page(
|
||||
struct intel_vgpu *vgpu, unsigned long gfn);
|
||||
|
||||
int intel_vgpu_sync_oos_pages(struct intel_vgpu *vgpu);
|
||||
|
||||
int intel_vgpu_flush_post_shadow(struct intel_vgpu *vgpu);
|
||||
|
|
|
|||
|
|
@ -168,7 +168,7 @@ TRACE_EVENT(spt_change,
|
|||
TP_printk("%s", __entry->buf)
|
||||
);
|
||||
|
||||
TRACE_EVENT(gpt_change,
|
||||
TRACE_EVENT(spt_guest_change,
|
||||
TP_PROTO(int id, const char *tag, void *spt, int type, u64 v,
|
||||
unsigned long index),
|
||||
|
||||
|
|
|
|||
Loading…
Reference in New Issue