The gvt component of this driver has ~120 pr_debugs, in 9 categories quite similar to those in DRM. Following the interface model of drm.debug, add a parameter to map bits to these categorizations.
DEFINE_DYNAMIC_DEBUG_CATEGORIES(debug_gvt, __gvt_debug, "dyndbg bitmap desc", [0] = { "gvt:cmd:" }, [1] = { "gvt:core:" }, [2] = { "gvt:dpy:" }, [3] = { "gvt:el:" }, [4] = { "gvt:irq:" }, [5] = { "gvt:mm:" }, [6] = { "gvt:mmio:" }, [7] = { "gvt:render:" }, [8] = { "gvt:sched:" });
If CONFIG_DYNAMIC_DEBUG_CORE=y, then gvt/Makefile adds -DDYNAMIC_DEBUG_MODULE to cflags, which CONFIG_DYNAMIC_DEBUG=n (CORE-only) builds need. This is redone more comprehensively soon.
Signed-off-by: Jim Cromie jim.cromie@gmail.com --- v5: . static decl of vector of bit->class descriptors - Emil.V . relocate gvt-makefile chunk from elsewhere
v7: . move ccflags addition up to i915/Makefile from i915/gvt
v8: . relocate DDD_CAT decl code into intel_gvt.c - Tvrtko cflags back to i915/Makefile . add -DDYNAMIC_DEBUG_MODULE to support DYNAMIC_DEBUG_CORE-only builds
heres unchanged? footprint:
bash-5.1# for m in i915 amdgpu nouveau; do modprobe $m; done dyndbg: 1 debug prints in module drm dyndbg: 2 debug prints in module ttm dyndbg: 8 debug prints in module video dyndbg: 167 debug prints in module i915 dyndbg: 2339 debug prints in module amdgpu [drm] amdgpu kernel modesetting enabled. amdgpu: CRAT table disabled by module option amdgpu: Virtual CRAT table created for CPU amdgpu: Topology: Add CPU node dyndbg: 3 debug prints in module wmi dyndbg: 3 debug prints in module nouveau --- drivers/gpu/drm/i915/Makefile | 2 ++ drivers/gpu/drm/i915/intel_gvt.c | 34 ++++++++++++++++++++++++++++++++ 2 files changed, 36 insertions(+)
diff --git a/drivers/gpu/drm/i915/Makefile b/drivers/gpu/drm/i915/Makefile index 335ba9f43d8f..a313e8a539f6 100644 --- a/drivers/gpu/drm/i915/Makefile +++ b/drivers/gpu/drm/i915/Makefile @@ -301,6 +301,8 @@ i915-y += intel_gvt.o include $(src)/gvt/Makefile endif
+ccflags-$(CONFIG_DYNAMIC_DEBUG_CORE) += -DDYNAMIC_DEBUG_MODULE + obj-$(CONFIG_DRM_I915) += i915.o obj-$(CONFIG_DRM_I915_GVT_KVMGT) += gvt/kvmgt.o
diff --git a/drivers/gpu/drm/i915/intel_gvt.c b/drivers/gpu/drm/i915/intel_gvt.c index 4e70c1a9ef2e..e53b41fa15e0 100644 --- a/drivers/gpu/drm/i915/intel_gvt.c +++ b/drivers/gpu/drm/i915/intel_gvt.c @@ -162,3 +162,37 @@ void intel_gvt_resume(struct drm_i915_private *dev_priv) if (intel_gvt_active(dev_priv)) intel_gvt_pm_resume(dev_priv->gvt); } + +#if defined(CONFIG_DRM_USE_DYNAMIC_DEBUG) + +unsigned long __gvt_debug; +EXPORT_SYMBOL(__gvt_debug); + +#define help_(_N, _cat) "\t Bit-" #_N ":\t" _cat "\n" + +#define I915_GVT_CATEGORIES(name) \ + " Enable debug output via /sys/module/i915/parameters/" #name \ + ", where each bit enables a debug category.\n" \ + help_(0, "gvt:cmd:") \ + help_(1, "gvt:core:") \ + help_(2, "gvt:dpy:") \ + help_(3, "gvt:el:") \ + help_(4, "gvt:irq:") \ + help_(5, "gvt:mm:") \ + help_(6, "gvt:mmio:") \ + help_(7, "gvt:render:") \ + help_(8, "gvt:sched:") + +DEFINE_DYNAMIC_DEBUG_CATEGORIES(debug_gvt, __gvt_debug, + I915_GVT_CATEGORIES(debug_gvt), + [0] = { "gvt:cmd:" }, + [1] = { "gvt:core:" }, + [2] = { "gvt:dpy:" }, + [3] = { "gvt:el:" }, + [4] = { "gvt:irq:" }, + [5] = { "gvt:mm:" }, + [6] = { "gvt:mmio:" }, + [7] = { "gvt:render:" }, + [8] = { "gvt:sched:" }); + +#endif