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drm/i915/gvt: use atomic operations to change the vGPU status

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Several vGPU status are used to decide the availability of GVT-g core
logics when creating a vGPU. Use atomic operations on changing the vGPU
status to avoid the racing.

Cc: Zhenyu Wang <zhenyuw@linux.intel.com>
Cc: Kevin Tian <kevin.tian@intel.com>
Cc: Jason Gunthorpe <jgg@nvidia.com>
Cc: intel-gvt-dev@lists.freedesktop.org
Suggested-by: Alex Williamson <alex.williamson@redhat.com>
Signed-off-by: Zhi Wang <zhi.a.wang@intel.com>
Reviewed-by: Zhenyu Wang <zhenyuw@linux.intel.com>
Reviewed-by: Kevin Tian <kevin.tian@intel.com>
Signed-off-by: Zhenyu Wang <zhenyuw@linux.intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/20221110122034.3382-2-zhi.a.wang@intel.com
This commit is contained in:
Zhi Wang
2022-11-10 12:20:34 +00:00
committed by Zhenyu Wang
parent 704f3384f3
commit a06d4b9e15
8 changed files with 53 additions and 40 deletions
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19
drivers/gpu/drm/i915/gvt/debugfs.c
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@@ -151,6 +151,22 @@ DEFINE_SIMPLE_ATTRIBUTE(vgpu_scan_nonprivbb_fops,
vgpu_scan_nonprivbb_get, vgpu_scan_nonprivbb_set,
"0x%llx\n");
static int vgpu_status_get(void *data, u64 *val)
{
struct intel_vgpu *vgpu = (struct intel_vgpu *)data;
*val = 0;
if (test_bit(INTEL_VGPU_STATUS_ATTACHED, vgpu->status))
*val |= (1 << INTEL_VGPU_STATUS_ATTACHED);
if (test_bit(INTEL_VGPU_STATUS_ACTIVE, vgpu->status))
*val |= (1 << INTEL_VGPU_STATUS_ACTIVE);
return 0;
}
DEFINE_SIMPLE_ATTRIBUTE(vgpu_status_fops, vgpu_status_get, NULL, "0x%llx\n");
/**
* intel_gvt_debugfs_add_vgpu - register debugfs entries for a vGPU
* @vgpu: a vGPU
@@ -162,11 +178,12 @@ void intel_gvt_debugfs_add_vgpu(struct intel_vgpu *vgpu)
snprintf(name, 16, "vgpu%d", vgpu->id);
vgpu->debugfs = debugfs_create_dir(name, vgpu->gvt->debugfs_root);
debugfs_create_bool("active", 0444, vgpu->debugfs, &vgpu->active);
debugfs_create_file("mmio_diff", 0444, vgpu->debugfs, vgpu,
&vgpu_mmio_diff_fops);
debugfs_create_file("scan_nonprivbb", 0644, vgpu->debugfs, vgpu,
&vgpu_scan_nonprivbb_fops);
debugfs_create_file("status", 0644, vgpu->debugfs, vgpu,
&vgpu_status_fops);
}
/**