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Commit 4c9414d7 authored by Changbin Du's avatar Changbin Du Committed by Zhenyu Wang
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drm/i915/gvt: Make PTE iterator 64K entry aware 



64K PTE is special, only PTE#0, PTE#16, PTE#32, ... PTE#496 are used in
the page table.

Signed-off-by: default avatarChangbin Du <changbin.du@intel.com>
Signed-off-by: default avatarZhenyu Wang <zhenyuw@linux.intel.com>
parent 155521c9

drivers/gpu/drm/i915/gvt/gtt.c

+6 −2
Original line number Diff line number Diff line
@@ -351,6 +351,8 @@ static inline int gtt_set_entry64(void *pt, 
#define GTT_SPTE_FLAG_MASK GENMASK_ULL(62, 52)

#define GTT_SPTE_FLAG_64K_SPLITED BIT(52) /* splited 64K gtt entry */



#define GTT_64K_PTE_STRIDE 16



static unsigned long gen8_gtt_get_pfn(struct intel_gvt_gtt_entry *e)

{

	unsigned long pfn;
@@ -889,12 +891,14 @@ static struct intel_vgpu_ppgtt_spt *ppgtt_alloc_spt_gfn( 
	(I915_GTT_PAGE_SIZE >> pt_entry_size_shift(spt))



#define for_each_present_guest_entry(spt, e, i) \

	for (i = 0; i < pt_entries(spt); i++) \

	for (i = 0; i < pt_entries(spt); \

	     i += spt->guest_page.pde_ips ? GTT_64K_PTE_STRIDE : 1) \

		if (!ppgtt_get_guest_entry(spt, e, i) && \

		    spt->vgpu->gvt->gtt.pte_ops->test_present(e))



#define for_each_present_shadow_entry(spt, e, i) \

	for (i = 0; i < pt_entries(spt); i++) \

	for (i = 0; i < pt_entries(spt); \

	     i += spt->shadow_page.pde_ips ? GTT_64K_PTE_STRIDE : 1) \

		if (!ppgtt_get_shadow_entry(spt, e, i) && \

		    spt->vgpu->gvt->gtt.pte_ops->test_present(e))