drm/i915/gvt: validate gfn before set shadow page entry

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GVT may receive partial write on one guest PTE update. Validate gfn
not to translate incomplete gfn. This avoids some unnecessary error
messages incurred by the incomplete gfn translating. Also fix the
bug that the whole PPGTT shadow page update is aborted on any invalid
gfn entry.

gfn validation relys on hypervisor's help. Add one MPT module function
to provide the function.

Signed-off-by: Hang Yuan <hang.yuan@intel.com>
Reviewed-by: Zhi Wang <zhi.a.wang@intel.com>
Signed-off-by: Zhenyu Wang <zhenyuw@linux.intel.com>
Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>

...

This commit is contained in:

Hang Yuan 2017-12-22 18:06:31 +08:00 • committed by Rodrigo Vivi

parent 03fa9350c3

commit cc753fbe1a

4 changed files with 53 additions and 5 deletions

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24

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

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1

drivers/gpu/drm/i915/gvt/hypercall.h

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16

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

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17

drivers/gpu/drm/i915/gvt/mpt.h

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