From: Changbin Du <changbin.du@intel.com>
Date: Tue, 30 Jan 2018 19:19:49 +0800
Subject: drm/i915/gvt: Rework shadow page management code
Git-commit: 44b467338094d86586d3ec351d8594a6cef0842a
Patch-mainline: v4.17-rc1
References: FATE#326289 FATE#326079 FATE#326049 FATE#322398 FATE#326166
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>
Acked-by: Petr Tesarik <ptesarik@suse.com>
---
drivers/gpu/drm/i915/gvt/gtt.c | 474 +++++++++++++++------------------------
drivers/gpu/drm/i915/gvt/gtt.h | 51 +---
drivers/gpu/drm/i915/gvt/trace.h | 2
3 files changed, 205 insertions(+), 322 deletions(-)
--- a/drivers/gpu/drm/i915/gvt/gtt.c
+++ b/drivers/gpu/drm/i915/gvt/gtt.c
@@ -593,11 +593,11 @@ static inline int ppgtt_spt_set_entry(
#define ppgtt_get_guest_entry(spt, e, index) \
ppgtt_spt_get_entry(spt, NULL, \
- spt->guest_page_type, e, index, true)
+ spt->guest_page.type, e, index, true)
#define ppgtt_set_guest_entry(spt, e, index) \
ppgtt_spt_set_entry(spt, NULL, \
- spt->guest_page_type, e, index, true)
+ spt->guest_page.type, e, index, true)
#define ppgtt_get_shadow_entry(spt, e, index) \
ppgtt_spt_get_entry(spt, spt->shadow_page.vaddr, \
@@ -607,52 +607,29 @@ static inline int ppgtt_spt_set_entry(
ppgtt_spt_set_entry(spt, spt->shadow_page.vaddr, \
spt->shadow_page.type, e, index, false)
-/**
- * intel_vgpu_init_page_track - init a page track data structure
- * @vgpu: a vGPU
- * @t: a page track data structure
- * @gfn: guest memory page frame number
- * @handler: the function will be called when target guest memory page has
- * been modified.
- *
- * This function is called when a user wants to prepare a page track data
- * structure to track a guest memory page.
- *
- * Returns:
- * Zero on success, negative error code if failed.
- */
-int intel_vgpu_init_page_track(struct intel_vgpu *vgpu,
- struct intel_vgpu_page_track *t,
- unsigned long gfn,
- int (*handler)(void *, u64, void *, int),
- void *data)
-{
- INIT_HLIST_NODE(&t->node);
-
- t->tracked = false;
- t->gfn = gfn;
- t->handler = handler;
- t->data = data;
+#define page_track_to_ppgtt_spt(ptr) \
+ container_of(ptr, struct intel_vgpu_ppgtt_spt, guest_page.track)
- hash_add(vgpu->gtt.tracked_guest_page_hash_table, &t->node, t->gfn);
- return 0;
+static void *alloc_spt(gfp_t gfp_mask)
+{
+ struct intel_vgpu_ppgtt_spt *spt;
+
+ spt = kzalloc(sizeof(*spt), gfp_mask);
+ if (!spt)
+ return NULL;
+
+ spt->shadow_page.page = alloc_page(gfp_mask);
+ if (!spt->shadow_page.page) {
+ kfree(spt);
+ return NULL;
+ }
+ return spt;
}
-/**
- * intel_vgpu_clean_page_track - release a page track data structure
- * @vgpu: a vGPU
- * @t: a page track data structure
- *
- * This function is called before a user frees a page track data structure.
- */
-void intel_vgpu_clean_page_track(struct intel_vgpu *vgpu,
- struct intel_vgpu_page_track *t)
+static void free_spt(struct intel_vgpu_ppgtt_spt *spt)
{
- if (!hlist_unhashed(&t->node))
- hash_del(&t->node);
-
- if (t->tracked)
- intel_gvt_hypervisor_disable_page_track(vgpu, t);
+ __free_page(spt->shadow_page.page);
+ kfree(spt);
}
/**
@@ -679,139 +656,53 @@ struct intel_vgpu_page_track *intel_vgpu
return NULL;
}
-static int init_guest_page(struct intel_vgpu *vgpu,
- struct intel_vgpu_guest_page *p,
- unsigned long gfn,
- int (*handler)(void *, u64, void *, int),
- void *data)
-{
- p->oos_page = NULL;
- p->write_cnt = 0;
-
- return intel_vgpu_init_page_track(vgpu, &p->track, gfn, handler, data);
-}
-
static int detach_oos_page(struct intel_vgpu *vgpu,
struct intel_vgpu_oos_page *oos_page);
-static void clean_guest_page(struct intel_vgpu *vgpu,
- struct intel_vgpu_guest_page *p)
-{
- if (p->oos_page)
- detach_oos_page(vgpu, p->oos_page);
-
- intel_vgpu_clean_page_track(vgpu, &p->track);
-}
-
-static inline int init_shadow_page(struct intel_vgpu *vgpu,
- struct intel_vgpu_shadow_page *p, int type, bool hash)
-{
- struct device *kdev = &vgpu->gvt->dev_priv->drm.pdev->dev;
- dma_addr_t daddr;
-
- daddr = dma_map_page(kdev, p->page, 0, 4096, PCI_DMA_BIDIRECTIONAL);
- if (dma_mapping_error(kdev, daddr)) {
- gvt_vgpu_err("fail to map dma addr\n");
- return -EINVAL;
- }
-
- p->vaddr = page_address(p->page);
- p->type = type;
-
- INIT_HLIST_NODE(&p->node);
-
- p->mfn = daddr >> I915_GTT_PAGE_SHIFT;
- if (hash)
- hash_add(vgpu->gtt.shadow_page_hash_table, &p->node, p->mfn);
- return 0;
-}
-
-static inline void clean_shadow_page(struct intel_vgpu *vgpu,
- struct intel_vgpu_shadow_page *p)
-{
- struct device *kdev = &vgpu->gvt->dev_priv->drm.pdev->dev;
-
- dma_unmap_page(kdev, p->mfn << I915_GTT_PAGE_SHIFT, 4096,
- PCI_DMA_BIDIRECTIONAL);
-
- if (!hlist_unhashed(&p->node))
- hash_del(&p->node);
-}
-
-static inline struct intel_vgpu_shadow_page *find_shadow_page(
- struct intel_vgpu *vgpu, unsigned long mfn)
+static void ppgtt_free_shadow_page(struct intel_vgpu_ppgtt_spt *spt)
{
- struct intel_vgpu_shadow_page *p;
+ struct device *kdev = &spt->vgpu->gvt->dev_priv->drm.pdev->dev;
- hash_for_each_possible(vgpu->gtt.shadow_page_hash_table,
- p, node, mfn) {
- if (p->mfn == mfn)
- return p;
- }
- return NULL;
-}
-
-#define page_track_to_guest_page(ptr) \
- container_of(ptr, struct intel_vgpu_guest_page, track)
-
-#define guest_page_to_ppgtt_spt(ptr) \
- container_of(ptr, struct intel_vgpu_ppgtt_spt, guest_page)
-
-#define shadow_page_to_ppgtt_spt(ptr) \
- container_of(ptr, struct intel_vgpu_ppgtt_spt, shadow_page)
-
-static void *alloc_spt(gfp_t gfp_mask)
-{
- struct intel_vgpu_ppgtt_spt *spt;
+ trace_spt_free(spt->vgpu->id, spt, spt->guest_page.type);
- spt = kzalloc(sizeof(*spt), gfp_mask);
- if (!spt)
- return NULL;
+ dma_unmap_page(kdev, spt->shadow_page.mfn << I915_GTT_PAGE_SHIFT, 4096,
+ PCI_DMA_BIDIRECTIONAL);
+ if (!hlist_unhashed(&spt->node))
+ hash_del(&spt->node);
- spt->shadow_page.page = alloc_page(gfp_mask);
- if (!spt->shadow_page.page) {
- kfree(spt);
- return NULL;
- }
- return spt;
-}
+ if (spt->guest_page.oos_page)
+ detach_oos_page(spt->vgpu, spt->guest_page.oos_page);
-static void free_spt(struct intel_vgpu_ppgtt_spt *spt)
-{
- __free_page(spt->shadow_page.page);
- kfree(spt);
-}
+ if (!hlist_unhashed(&spt->guest_page.track.node))
+ hash_del(&spt->guest_page.track.node);
-static void ppgtt_free_shadow_page(struct intel_vgpu_ppgtt_spt *spt)
-{
- trace_spt_free(spt->vgpu->id, spt, spt->shadow_page.type);
+ if (spt->guest_page.track.tracked)
+ intel_gvt_hypervisor_disable_page_track(spt->vgpu,
+ &spt->guest_page.track);
- clean_shadow_page(spt->vgpu, &spt->shadow_page);
- clean_guest_page(spt->vgpu, &spt->guest_page);
list_del_init(&spt->post_shadow_list);
-
free_spt(spt);
}
static void ppgtt_free_all_shadow_page(struct intel_vgpu *vgpu)
{
struct hlist_node *n;
- struct intel_vgpu_shadow_page *sp;
+ struct intel_vgpu_ppgtt_spt *spt;
int i;
- hash_for_each_safe(vgpu->gtt.shadow_page_hash_table, i, n, sp, node)
- ppgtt_free_shadow_page(shadow_page_to_ppgtt_spt(sp));
+ hash_for_each_safe(vgpu->gtt.shadow_page_hash_table, i, n, spt, node)
+ ppgtt_free_shadow_page(spt);
}
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);
static int ppgtt_write_protection_handler(void *data, u64 pa,
void *p_data, int bytes)
{
struct intel_vgpu_page_track *t = data;
- struct intel_vgpu_guest_page *p = page_track_to_guest_page(t);
+ struct intel_vgpu_ppgtt_spt *spt = page_track_to_ppgtt_spt(t);
int ret;
if (bytes != 4 && bytes != 8)
@@ -820,20 +711,47 @@ static int ppgtt_write_protection_handle
if (!t->tracked)
return -EINVAL;
- ret = ppgtt_handle_guest_write_page_table_bytes(p,
+ ret = ppgtt_handle_guest_write_page_table_bytes(spt,
pa, p_data, bytes);
if (ret)
return ret;
return ret;
}
+/* Find a spt by guest gfn. */
+static struct intel_vgpu_ppgtt_spt *intel_vgpu_find_spt_by_gfn(
+ struct intel_vgpu *vgpu, unsigned long gfn)
+{
+ struct intel_vgpu_page_track *track;
+
+ track = intel_vgpu_find_tracked_page(vgpu, gfn);
+ if (track)
+ return page_track_to_ppgtt_spt(track);
+
+ return NULL;
+}
+
+/* Find the spt by shadow page mfn. */
+static struct intel_vgpu_ppgtt_spt *intel_vgpu_find_spt_by_mfn(
+ struct intel_vgpu *vgpu, unsigned long mfn)
+{
+ struct intel_vgpu_ppgtt_spt *spt;
+
+ hash_for_each_possible(vgpu->gtt.shadow_page_hash_table, spt, node, mfn) {
+ if (spt->shadow_page.mfn == mfn)
+ return spt;
+ }
+ return NULL;
+}
+
static int reclaim_one_ppgtt_mm(struct intel_gvt *gvt);
static struct intel_vgpu_ppgtt_spt *ppgtt_alloc_shadow_page(
struct intel_vgpu *vgpu, int type, unsigned long gfn)
{
+ struct device *kdev = &vgpu->gvt->dev_priv->drm.pdev->dev;
struct intel_vgpu_ppgtt_spt *spt = NULL;
- int ret;
+ dma_addr_t daddr;
retry:
spt = alloc_spt(GFP_KERNEL | __GFP_ZERO);
@@ -846,44 +764,39 @@ retry:
}
spt->vgpu = vgpu;
- spt->guest_page_type = type;
atomic_set(&spt->refcount, 1);
INIT_LIST_HEAD(&spt->post_shadow_list);
/*
- * TODO: guest page type may be different with shadow page type,
- * when we support PSE page in future.
+ * Init shadow_page.
*/
- ret = init_shadow_page(vgpu, &spt->shadow_page, type, true);
- if (ret) {
- gvt_vgpu_err("fail to initialize shadow page for spt\n");
- goto err;
+ spt->shadow_page.type = type;
+ daddr = dma_map_page(kdev, spt->shadow_page.page,
+ 0, 4096, PCI_DMA_BIDIRECTIONAL);
+ if (dma_mapping_error(kdev, daddr)) {
+ gvt_vgpu_err("fail to map dma addr\n");
+ free_spt(spt);
+ return ERR_PTR(-EINVAL);
}
+ spt->shadow_page.vaddr = page_address(spt->shadow_page.page);
+ spt->shadow_page.mfn = daddr >> I915_GTT_PAGE_SHIFT;
- ret = init_guest_page(vgpu, &spt->guest_page,
- gfn, ppgtt_write_protection_handler, NULL);
- if (ret) {
- gvt_vgpu_err("fail to initialize guest page for spt\n");
- goto err;
- }
+ /*
+ * Init guest_page.
+ */
+ spt->guest_page.type = type;
+ spt->guest_page.gfn = gfn;
- trace_spt_alloc(vgpu->id, spt, type, spt->shadow_page.mfn, gfn);
- return spt;
-err:
- ppgtt_free_shadow_page(spt);
- return ERR_PTR(ret);
-}
+ spt->guest_page.track.gfn = gfn;
+ spt->guest_page.track.handler = ppgtt_write_protection_handler;
+ hash_add(vgpu->gtt.tracked_guest_page_hash_table,
+ &spt->guest_page.track.node, gfn);
-static struct intel_vgpu_ppgtt_spt *ppgtt_find_shadow_page(
- struct intel_vgpu *vgpu, unsigned long mfn)
-{
- struct intel_vgpu_shadow_page *p = find_shadow_page(vgpu, mfn);
+ INIT_HLIST_NODE(&spt->node);
+ hash_add(vgpu->gtt.shadow_page_hash_table, &spt->node, spt->shadow_page.mfn);
- if (p)
- return shadow_page_to_ppgtt_spt(p);
-
- gvt_vgpu_err("fail to find ppgtt shadow page: 0x%lx\n", mfn);
- return NULL;
+ trace_spt_alloc(vgpu->id, spt, type, spt->shadow_page.mfn, gfn);
+ return spt;
}
#define pt_entry_size_shift(spt) \
@@ -929,7 +842,7 @@ static int ppgtt_invalidate_shadow_page_
vgpu->gtt.scratch_pt[cur_pt_type].page_mfn)
return 0;
}
- s = ppgtt_find_shadow_page(vgpu, ops->get_pfn(e));
+ s = intel_vgpu_find_spt_by_mfn(vgpu, ops->get_pfn(e));
if (!s) {
gvt_vgpu_err("fail to find shadow page: mfn: 0x%lx\n",
ops->get_pfn(e));
@@ -947,7 +860,7 @@ static int ppgtt_invalidate_shadow_page(
int v = atomic_read(&spt->refcount);
trace_spt_change(spt->vgpu->id, "die", spt,
- spt->guest_page.track.gfn, spt->shadow_page.type);
+ spt->guest_page.gfn, spt->shadow_page.type);
trace_spt_refcount(spt->vgpu->id, "dec", spt, v, (v - 1));
@@ -981,7 +894,7 @@ static int ppgtt_invalidate_shadow_page(
}
release:
trace_spt_change(spt->vgpu->id, "release", spt,
- spt->guest_page.track.gfn, spt->shadow_page.type);
+ spt->guest_page.gfn, spt->shadow_page.type);
ppgtt_free_shadow_page(spt);
return 0;
fail:
@@ -996,43 +909,38 @@ static struct intel_vgpu_ppgtt_spt *ppgt
struct intel_vgpu *vgpu, struct intel_gvt_gtt_entry *we)
{
struct intel_gvt_gtt_pte_ops *ops = vgpu->gvt->gtt.pte_ops;
- struct intel_vgpu_ppgtt_spt *s = NULL;
- struct intel_vgpu_guest_page *g;
- struct intel_vgpu_page_track *t;
+ struct intel_vgpu_ppgtt_spt *spt = NULL;
int ret;
GEM_BUG_ON(!gtt_type_is_pt(get_next_pt_type(we->type)));
- t = intel_vgpu_find_tracked_page(vgpu, ops->get_pfn(we));
- 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(st
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 @@ fail:
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_remo
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 @@ fail:
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_vg
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_vg
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_
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_
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(struc
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 int
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 int
* 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
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 @@ fail:
-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
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
}
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
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
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
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 i
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_
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_
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_e
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(str
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) {
--- a/drivers/gpu/drm/i915/gvt/gtt.h
+++ b/drivers/gpu/drm/i915/gvt/gtt.h
@@ -205,16 +205,6 @@ extern void intel_gvt_clean_gtt(struct i
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);
--- a/drivers/gpu/drm/i915/gvt/trace.h
+++ b/drivers/gpu/drm/i915/gvt/trace.h
@@ -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),