[PATCH] D91458: [NFC][AMDGPU] Document kernel descriptor
Tony Tye via Phabricator via llvm-commits
llvm-commits at lists.llvm.org
Fri Nov 20 20:55:40 PST 2020
This revision was landed with ongoing or failed builds.
This revision was automatically updated to reflect the committed changes.
Closed by commit rG8605d3134c97: [NFC][AMDGPU] Document kernel descriptor (authored by t-tye).
Repository:
rG LLVM Github Monorepo
CHANGES SINCE LAST ACTION
https://reviews.llvm.org/D91458/new/
https://reviews.llvm.org/D91458
Files:
llvm/docs/AMDGPUUsage.rst
Index: llvm/docs/AMDGPUUsage.rst
===================================================================
--- llvm/docs/AMDGPUUsage.rst
+++ llvm/docs/AMDGPUUsage.rst
@@ -3144,14 +3144,17 @@
execution of a kernel, including the entry point address of the machine code
that implements the kernel.
-Kernel Descriptor for GFX6-GFX10
-++++++++++++++++++++++++++++++++
+Code Object V3 Kernel Descriptor for GFX6-GFX10 (--amdhsa-code-object-version=3)
+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++=+++++++++
CP microcode requires the Kernel descriptor to be allocated on 64-byte
alignment.
- .. table:: Kernel Descriptor for GFX6-GFX10
- :name: amdgpu-amdhsa-kernel-descriptor-gfx6-gfx10-table
+The fields used by CP for code objects before V3 also match those specified in
+:ref:`amdgpu-amdhsa-kernel-descriptor-gfx6-gfx10-table-v3`.
+
+ .. table:: Code Object V3 Kernel Descriptor for GFX6-GFX10
+ :name: amdgpu-amdhsa-kernel-descriptor-gfx6-gfx10-table-v3
======= ======= =============================== ============================
Bits Size Field Name Description
@@ -3235,8 +3238,12 @@
- If 1 execute in
native wavefront size
32 mode.
- 463:459 5 bits Reserved, must be 0.
- 511:464 6 bytes Reserved, must be 0.
+ 463:459 1 bit Reserved, must be 0.
+ 464 1 bit RESERVED_464 Deprecated, must be 0.
+ 467:465 3 bits Reserved, must be 0.
+ 468 1 bit RESERVED_468 Deprecated, must be 0.
+ 469:471 3 bits Reserved, must be 0.
+ 511:472 5 bytes Reserved, must be 0.
512 **Total size 64 bytes.**
======= ====================================================================
@@ -8746,25 +8753,25 @@
Directive Default Supported On Description
======================================================== =================== ============ ===================
``.amdhsa_group_segment_fixed_size`` 0 GFX6-GFX10 Controls GROUP_SEGMENT_FIXED_SIZE in
- :ref:`amdgpu-amdhsa-kernel-descriptor-gfx6-gfx10-table`.
+ :ref:`amdgpu-amdhsa-kernel-descriptor-gfx6-gfx10-table-v3`.
``.amdhsa_private_segment_fixed_size`` 0 GFX6-GFX10 Controls PRIVATE_SEGMENT_FIXED_SIZE in
- :ref:`amdgpu-amdhsa-kernel-descriptor-gfx6-gfx10-table`.
+ :ref:`amdgpu-amdhsa-kernel-descriptor-gfx6-gfx10-table-v3`.
``.amdhsa_user_sgpr_private_segment_buffer`` 0 GFX6-GFX10 Controls ENABLE_SGPR_PRIVATE_SEGMENT_BUFFER in
- :ref:`amdgpu-amdhsa-kernel-descriptor-gfx6-gfx10-table`.
+ :ref:`amdgpu-amdhsa-kernel-descriptor-gfx6-gfx10-table-v3`.
``.amdhsa_user_sgpr_dispatch_ptr`` 0 GFX6-GFX10 Controls ENABLE_SGPR_DISPATCH_PTR in
- :ref:`amdgpu-amdhsa-kernel-descriptor-gfx6-gfx10-table`.
+ :ref:`amdgpu-amdhsa-kernel-descriptor-gfx6-gfx10-table-v3`.
``.amdhsa_user_sgpr_queue_ptr`` 0 GFX6-GFX10 Controls ENABLE_SGPR_QUEUE_PTR in
- :ref:`amdgpu-amdhsa-kernel-descriptor-gfx6-gfx10-table`.
+ :ref:`amdgpu-amdhsa-kernel-descriptor-gfx6-gfx10-table-v3`.
``.amdhsa_user_sgpr_kernarg_segment_ptr`` 0 GFX6-GFX10 Controls ENABLE_SGPR_KERNARG_SEGMENT_PTR in
- :ref:`amdgpu-amdhsa-kernel-descriptor-gfx6-gfx10-table`.
+ :ref:`amdgpu-amdhsa-kernel-descriptor-gfx6-gfx10-table-v3`.
``.amdhsa_user_sgpr_dispatch_id`` 0 GFX6-GFX10 Controls ENABLE_SGPR_DISPATCH_ID in
- :ref:`amdgpu-amdhsa-kernel-descriptor-gfx6-gfx10-table`.
+ :ref:`amdgpu-amdhsa-kernel-descriptor-gfx6-gfx10-table-v3`.
``.amdhsa_user_sgpr_flat_scratch_init`` 0 GFX6-GFX10 Controls ENABLE_SGPR_FLAT_SCRATCH_INIT in
- :ref:`amdgpu-amdhsa-kernel-descriptor-gfx6-gfx10-table`.
+ :ref:`amdgpu-amdhsa-kernel-descriptor-gfx6-gfx10-table-v3`.
``.amdhsa_user_sgpr_private_segment_size`` 0 GFX6-GFX10 Controls ENABLE_SGPR_PRIVATE_SEGMENT_SIZE in
- :ref:`amdgpu-amdhsa-kernel-descriptor-gfx6-gfx10-table`.
+ :ref:`amdgpu-amdhsa-kernel-descriptor-gfx6-gfx10-table-v3`.
``.amdhsa_wavefront_size32`` Target GFX10 Controls ENABLE_WAVEFRONT_SIZE32 in
- Feature :ref:`amdgpu-amdhsa-kernel-descriptor-gfx6-gfx10-table`.
+ Feature :ref:`amdgpu-amdhsa-kernel-descriptor-gfx6-gfx10-table-v3`.
Specific
(-wavefrontsize64)
``.amdhsa_system_sgpr_private_segment_wavefront_offset`` 0 GFX6-GFX10 Controls ENABLE_SGPR_PRIVATE_SEGMENT_WAVEFRONT_OFFSET in
@@ -8821,7 +8828,7 @@
``.amdhsa_fp16_overflow`` 0 GFX9-GFX10 Controls FP16_OVFL in
:ref:`amdgpu-amdhsa-compute_pgm_rsrc1-gfx6-gfx10-table`.
``.amdhsa_workgroup_processor_mode`` Target GFX10 Controls ENABLE_WGP_MODE in
- Feature :ref:`amdgpu-amdhsa-kernel-descriptor-gfx6-gfx10-table`.
+ Feature :ref:`amdgpu-amdhsa-kernel-descriptor-gfx6-gfx10-table-v3`.
Specific
(-cumode)
``.amdhsa_memory_ordered`` 1 GFX10 Controls MEM_ORDERED in
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