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drm/i915/gvt: Fix GFX_MODE handling

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Enter failsafe if vgpu tries to change GFX_MODE controlled by host.

Reviewed-by: Zhenyu Wang <zhenyuw@linux.intel.com>
Signed-off-by: Colin Xu <colin.xu@intel.com>
Signed-off-by: Zhenyu Wang <zhenyuw@linux.intel.com>
This commit is contained in:
Colin Xu 2019-05-28 11:20:34 +08:00 • committed by Zhenyu Wang
parent 1fd45b09b1
commit 888c0094b2
1 changed files with 14 additions and 0 deletions
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14
drivers/gpu/drm/i915/gvt/handlers.c
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@ -1692,8 +1692,22 @@ static int ring_mode_mmio_write(struct intel_vgpu *vgpu, unsigned int offset,
bool enable_execlist;
int ret;
(*(u32 *)p_data) &= ~_MASKED_BIT_ENABLE(1);
if (IS_COFFEELAKE(vgpu->gvt->dev_priv))
(*(u32 *)p_data) &= ~_MASKED_BIT_ENABLE(2);
write_vreg(vgpu, offset, p_data, bytes);
if (data & _MASKED_BIT_ENABLE(1)) {
enter_failsafe_mode(vgpu, GVT_FAILSAFE_UNSUPPORTED_GUEST);
return 0;
}
if (IS_COFFEELAKE(vgpu->gvt->dev_priv) &&
data & _MASKED_BIT_ENABLE(2)) {
enter_failsafe_mode(vgpu, GVT_FAILSAFE_UNSUPPORTED_GUEST);
return 0;
}
/* when PPGTT mode enabled, we will check if guest has called
* pvinfo, if not, we will treat this guest as non-gvtg-aware
* guest, and stop emulating its cfg space, mmio, gtt, etc.