[PATCH] drm/i915/gvt: Fix GFX_MODE handling
Colin Xu
Colin.Xu at intel.com
Thu May 23 07:46:37 UTC 2019
Enter failsafe if vgpu tries to change GFX_MODE controlled by host.
Signed-off-by: Colin Xu<colin.xu at intel.com>
---
drivers/gpu/drm/i915/gvt/handlers.c | 14 ++++++++++++++
1 file changed, 14 insertions(+)
diff --git a/drivers/gpu/drm/i915/gvt/handlers.c b/drivers/gpu/drm/i915/gvt/handlers.c
index b4fc7f95cbe1..edb1416585f5 100644
--- a/drivers/gpu/drm/i915/gvt/handlers.c
+++ b/drivers/gpu/drm/i915/gvt/handlers.c
@@ -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.
--
2.21.0
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