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drm/i915/gvt: Stop initializing pvinfo through reading mmio 

The region of pvinfo is reserved for communication between a VMM and
the GPU driver executing on a virtual machine. HW doesn't have any
backing mmio store support for the pvinfo region, thus accessing to
this range through MMIO read/write from host side is forbidden which
is regarded as unclaimed register access.

This patch leaves pvinfo range be initialized with zero.

Signed-off-by: Tina Zhang <tina.zhang@intel.com>
Reviewed-by: Zhenyu Wang <zhenyuw@linux.intel.com>
Signed-off-by: Zhenyu Wang <zhenyuw@linux.intel.com>
This commit is contained in:
Tina Zhang 2019-11-04 13:31:48 +08:00 committed by Zhenyu Wang
parent d9dace9438
commit 83faaf074e
1 changed files with 4 additions and 0 deletions
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4
drivers/gpu/drm/i915/gvt/handlers.c
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@ -3420,6 +3420,10 @@ int intel_gvt_for_each_tracked_mmio(struct intel_gvt *gvt,
}
for (i = 0; i < gvt->mmio.num_mmio_block; i++, block++) {
/* pvinfo data doesn't come from hw mmio */
if (i915_mmio_reg_offset(block->offset) == VGT_PVINFO_PAGE)
continue;
for (j = 0; j < block->size; j += 4) {
ret = handler(gvt,
i915_mmio_reg_offset(block->offset) + j,