From: Ping Gao <ping.a.gao@intel.com>
Date: Thu, 10 Nov 2016 07:27:20 +0000 (+0800)
Subject: drm/i915/gvt: emulate right behavior for tlb_control
X-Git-Tag: v4.10-rc1~154^2~21^2~39^2~8
X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=4f3f1aed4b8040f2a7a55561762470f942be2740;p=karo-tx-linux.git

drm/i915/gvt: emulate right behavior for tlb_control

Emulate right behavior for tlb_control, set to ZERO upon write.

Signed-off-by: Ping Gao <ping.a.gao@intel.com>
Signed-off-by: Min He <min.he@intel.com>
Signed-off-by: Zhenyu Wang <zhenyuw@linux.intel.com>
---

diff --git a/drivers/gpu/drm/i915/gvt/handlers.c b/drivers/gpu/drm/i915/gvt/handlers.c
index 1b3db0c7a6db..8d3389ee0506 100644
--- a/drivers/gpu/drm/i915/gvt/handlers.c
+++ b/drivers/gpu/drm/i915/gvt/handlers.c
@@ -1372,6 +1372,7 @@ static int gvt_reg_tlb_control_handler(struct intel_vgpu *vgpu,
 	unsigned int id = 0;
 
 	write_vreg(vgpu, offset, p_data, bytes);
+	vgpu_vreg(vgpu, offset) = 0;
 
 	switch (offset) {
 	case 0x4260: