From a45050d718f629104cfdfde0345dae617bdef3fc Mon Sep 17 00:00:00 2001
From: Zhenyu Wang <zhenyuw@linux.intel.com>
Date: Tue, 1 Aug 2017 13:09:47 +0800
Subject: [PATCH] drm/i915/gvt: expose vGPU context hw id
Git-commit: a45050d718f629104cfdfde0345dae617bdef3fc
Patch-mainline: v4.14-rc1
References: FATE#322643 bsc#1055900

This exposes vGPU context hw id in mdev sysfs which is used to
do vGPU based profiling. Retrieved vGPU context hw id can be set
through i915 perf ioctl to set profiling for target vGPU.

Cc: Jiao Pengyuan <pengyuan.jiao@intel.com>
Cc: Niu Bing <bing.niu@intel.com>
Signed-off-by: Zhenyu Wang <zhenyuw@linux.intel.com>
Acked-by: Takashi Iwai <tiwai@suse.de>

---
 drivers/gpu/drm/i915/gvt/kvmgt.c |   17 +++++++++++++++++
 1 file changed, 17 insertions(+)

--- a/drivers/gpu/drm/i915/gvt/kvmgt.c
+++ b/drivers/gpu/drm/i915/gvt/kvmgt.c
@@ -1170,10 +1170,27 @@ vgpu_id_show(struct device *dev, struct
 	return sprintf(buf, "\n");
 }
 
+static ssize_t
+hw_id_show(struct device *dev, struct device_attribute *attr,
+	   char *buf)
+{
+	struct mdev_device *mdev = mdev_from_dev(dev);
+
+	if (mdev) {
+		struct intel_vgpu *vgpu = (struct intel_vgpu *)
+			mdev_get_drvdata(mdev);
+		return sprintf(buf, "%u\n",
+			       vgpu->shadow_ctx->hw_id);
+	}
+	return sprintf(buf, "\n");
+}
+
 static DEVICE_ATTR_RO(vgpu_id);
+static DEVICE_ATTR_RO(hw_id);
 
 static struct attribute *intel_vgpu_attrs[] = {
 	&dev_attr_vgpu_id.attr,
+	&dev_attr_hw_id.attr,
 	NULL
 };