[Buildroot] [PATCH] package/mesa3d: add intel-virtio host native context config

[Buildroot] [PATCH] package/mesa3d: add intel-virtio host native context config

[Adam Ford]

Add BR2_PACKAGE_MESA3D_HOST_NATIVE_CONTEXT_DRIVER_INTEL in the same
pattern as amdgpu-virtio. When enabled, -Dintel-virtio-experimental=true
defines HAVE_INTEL_VIRTIO so the guest-side Intel native context
(i915 and xe context types) is compiled in. This is the guest half
of the Intel vDRM GPU passthrough path, usable by the crocus/iris
(OpenGL) and ANV (Vulkan) drivers.

Note that this is an experimental Mesa feature (the upstream meson
option is named intel-virtio-experimental) and is disabled by default.

Signed-off-by: Adam Ford <aford173@gmail.com>

diff --git a/package/mesa3d/Config.in b/package/mesa3d/Config.in
index e184039150..ad02b5e829 100644
--- a/package/mesa3d/Config.in
+++ b/package/mesa3d/Config.in
@@ -130,6 +130,7 @@ config BR2_PACKAGE_MESA3D_GALLIUM_DRIVER_CROCUS
 	bool "Gallium crocus driver"
 	depends on BR2_i386 || BR2_x86_64
 	select BR2_PACKAGE_MESA3D_GALLIUM_DRIVER
+	select BR2_PACKAGE_MESA3D_HOST_NATIVE_CONTEXT_SUPPORTED_DRIVER
 	help
 	  Mesa driver for gen4-7 Intel GPUs.
 
@@ -167,6 +168,7 @@ config BR2_PACKAGE_MESA3D_GALLIUM_DRIVER_IRIS
 	bool "Gallium iris driver"
 	depends on BR2_PACKAGE_MESA3D_LLVM
 	select BR2_PACKAGE_MESA3D_GALLIUM_DRIVER
+	select BR2_PACKAGE_MESA3D_HOST_NATIVE_CONTEXT_SUPPORTED_DRIVER
 	select BR2_PACKAGE_MESA3D_NEEDS_PRECOMP_COMPILER
 	select BR2_PACKAGE_MESA3D_RUSTICL_SUPPORTED_DRIVER
 	help
@@ -393,6 +395,7 @@ config BR2_PACKAGE_MESA3D_VULKAN_DRIVER_INTEL
 	depends on BR2_TOOLCHAIN_HEADERS_AT_LEAST_3_17 # memfd.h
 	depends on BR2_TOOLCHAIN_USES_GLIBC # ifunc, static_assert
 	depends on BR2_PACKAGE_MESA3D_LLVM
+	select BR2_PACKAGE_MESA3D_HOST_NATIVE_CONTEXT_SUPPORTED_DRIVER
 	select BR2_PACKAGE_MESA3D_NEEDS_PRECOMP_COMPILER
 	select BR2_PACKAGE_MESA3D_VULKAN_DRIVER
 	help
@@ -459,6 +462,22 @@ config BR2_PACKAGE_MESA3D_HOST_NATIVE_CONTEXT_DRIVER_FREEDRENO
 	  Select this when running Mesa inside a virtual machine
 	  with virtio-gpu host native context support.
 
+config BR2_PACKAGE_MESA3D_HOST_NATIVE_CONTEXT_DRIVER_INTEL
+	bool "intel-virtio"
+	depends on BR2_PACKAGE_MESA3D_GALLIUM_DRIVER_CROCUS || \
+		BR2_PACKAGE_MESA3D_GALLIUM_DRIVER_IRIS || \
+		BR2_PACKAGE_MESA3D_VULKAN_DRIVER_INTEL
+	help
+	  Enable VirtIO support for Intel native contexts
+	  used by the crocus/iris (OpenGL) and ANV (Vulkan)
+	  drivers.
+
+	  This is an experimental Mesa feature and is disabled
+	  by default.
+
+	  Select this when running Mesa inside a virtual machine
+	  with virtio-gpu host native context support.
+
 config BR2_PACKAGE_MESA3D_HOST_NATIVE_CONTEXT_SUPPORTED_DRIVER
 	bool
 
diff --git a/package/mesa3d/mesa3d.mk b/package/mesa3d/mesa3d.mk
index 8e6c2ee5b8..87377b7ce4 100644
--- a/package/mesa3d/mesa3d.mk
+++ b/package/mesa3d/mesa3d.mk
@@ -164,6 +164,12 @@ else
 MESA3D_CONF_OPTS += -Damdgpu-virtio=false
 endif
 
+ifeq ($(BR2_PACKAGE_MESA3D_HOST_NATIVE_CONTEXT_DRIVER_INTEL),y)
+MESA3D_CONF_OPTS += -Dintel-virtio-experimental=true
+else
+MESA3D_CONF_OPTS += -Dintel-virtio-experimental=false
+endif
+
 ifneq ($(BR2_PACKAGE_MESA3D_GALLIUM_DRIVER_FREEDRENO)$(BR2_PACKAGE_MESA3D_VULKAN_DRIVER_FREEDRENO),)
 MESA3D_FREEDRENO_KMDS = msm
 ifeq ($(BR2_PACKAGE_MESA3D_HOST_NATIVE_CONTEXT_DRIVER_FREEDRENO),y)
-- 
2.53.0

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