diff options
| author | Tina Zhang <tina.zhang@intel.com> | 2019-11-04 13:31:48 +0800 |
|---|---|---|
| committer | Zhenyu Wang <zhenyuw@linux.intel.com> | 2019-11-08 11:08:07 +0800 |
| commit | 83faaf074e6d1ca4d1441aded0d3f01bce413479 (patch) | |
| tree | 9415fbdfcd4ad32fe152df55eb4268a040b52f85 | |
| parent | d9dace9438945e7c13d91e62927c5c6c88a37ee5 (diff) | |
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>
| -rw-r--r-- | drivers/gpu/drm/i915/gvt/handlers.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/drivers/gpu/drm/i915/gvt/handlers.c b/drivers/gpu/drm/i915/gvt/handlers.c index afd7f66bdc2d..bd12af349123 100644 --- a/drivers/gpu/drm/i915/gvt/handlers.c +++ b/drivers/gpu/drm/i915/gvt/handlers.c @@ -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, |