From 888c0094b2e2892b5916475d6f53356a7b53732b Mon Sep 17 00:00:00 2001 From: Colin Xu Date: Tue, 28 May 2019 11:20:34 +0800 Subject: [PATCH] drm/i915/gvt: Fix GFX_MODE handling Enter failsafe if vgpu tries to change GFX_MODE controlled by host. Reviewed-by: Zhenyu Wang Signed-off-by: Colin Xu Signed-off-by: Zhenyu Wang --- 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. -- 2.30.2