diff mbox series

[v5,2/7] package/llvm: enable AMDGPU

Message ID 20180404163124.27934-3-valentin.korenblit@smile.fr
State Accepted
Headers show
Series llvm for mesa3d | expand

Commit Message

Valentin Korenblit April 4, 2018, 4:31 p.m. UTC 
The AMDGPU backend provides ISA code generation for AMD GPU's,
starting with the R600 family up until the current GCN families.

It should not be confused with the AMDGPU Linux kernel DRM driver.

For more info: https://llvm.org/docs/AMDGPUUsage.html

Signed-off-by: Valentin Korenblit <valentin.korenblit@smile.fr>
Tested-by: Jérôme Oufella <jerome.oufella@savoirfairelinux.com>
---

Tested on HD6480 using Gallium Radeon R600 driver.

 package/llvm/Config.in | 10 ++++++++++
 package/llvm/llvm.mk   |  9 +++++++++
 2 files changed, 19 insertions(+)

Comments

Thomas Petazzoni April 4, 2018, 8:52 p.m. UTC | #1 
Hello,

On Wed,  4 Apr 2018 18:31:19 +0200, Valentin Korenblit wrote:
> The AMDGPU backend provides ISA code generation for AMD GPU's,
> starting with the R600 family up until the current GCN families.
> 
> It should not be confused with the AMDGPU Linux kernel DRM driver.
> 
> For more info: https://llvm.org/docs/AMDGPUUsage.html
> 
> Signed-off-by: Valentin Korenblit <valentin.korenblit@smile.fr>
> Tested-by: Jérôme Oufella <jerome.oufella@savoirfairelinux.com>
> ---

Applied to master, thanks.

Thomas
diff mbox series

Patch

diff --git a/package/llvm/Config.in b/package/llvm/Config.in
index f222b196cb..41e8e940bb 100644
--- a/package/llvm/Config.in
+++ b/package/llvm/Config.in
@@ -22,6 +22,16 @@  config BR2_PACKAGE_LLVM
 
 	  http://llvm.org
 
+if BR2_PACKAGE_LLVM
+
+config BR2_PACKAGE_LLVM_AMDGPU
+	bool "AMDGPU backend"
+	help
+	  Build AMDGPU target. Select this option if you are going
+	  to install mesa3d with llvm and use Gallium Radeon driver.
+
+endif
+
 comment "llvm needs a toolchain w/ gcc >= 4.8, host gcc >= 4.8"
 	depends on !BR2_HOST_GCC_AT_LEAST_4_8 \
 		|| !BR2_TOOLCHAIN_GCC_AT_LEAST_4_8
diff --git a/package/llvm/llvm.mk b/package/llvm/llvm.mk
index 525e0f98f8..9c8bf5c820 100644
--- a/package/llvm/llvm.mk
+++ b/package/llvm/llvm.mk
@@ -45,6 +45,15 @@  LLVM_CONF_OPTS = -DLLVM_TARGETS_TO_BUILD="$(subst $(space),;,$(LLVM_TARGETS_TO_B
 HOST_LLVM_CONF_OPTS += -DLLVM_TARGET_ARCH=$(LLVM_TARGET_ARCH)
 LLVM_CONF_OPTS += -DLLVM_TARGET_ARCH=$(LLVM_TARGET_ARCH)
 
+# Build AMDGPU backend
+# We need to build AMDGPU backend for both host and target because
+# llvm-config --targets built (host variant installed in STAGING) will
+# output only $(LLVM_TARGET_ARCH) if not, and mesa3d won't build as
+# it thinks AMDGPU backend is not installed on the target.
+ifeq ($(BR2_PACKAGE_LLVM_AMDGPU),y)
+LLVM_TARGETS_TO_BUILD += AMDGPU
+endif
+
 # Use native llvm-tblgen from host-llvm (needed for cross-compilation)
 LLVM_CONF_OPTS += -DLLVM_TABLEGEN=$(HOST_DIR)/bin/llvm-tblgen