[0/3] riscv: Add kernel-mode FPU support for amdgpu

Message

Samuel Holland Nov. 22, 2023, 3:05 a.m. UTC

This series allows using newer AMD GPUs (e.g. Navi) on RISC-V boards
such as SiFive's HiFive Unmatched. Those GPUs need CONFIG_DRM_AMD_DC_FP
to initialize, which requires kernel-mode FPU support.

I'm sending these patches as one series so there is a user along with
the infrastructure being added. I assume patch 3 would be merged
separately, after patches 1-2 are merged.


Samuel Holland (3):
  riscv: Add support for kernel-mode FPU
  riscv: Factor out riscv-march-y to a separate Makefile
  drm/amd/display: Support DRM_AMD_DC_FP on RISC-V

 arch/riscv/Makefile                            | 12 +-----------
 arch/riscv/Makefile.isa                        | 15 +++++++++++++++
 arch/riscv/include/asm/switch_to.h             | 14 ++++++++++++++
 arch/riscv/kernel/process.c                    |  3 +++
 drivers/gpu/drm/amd/display/Kconfig            |  5 ++++-
 drivers/gpu/drm/amd/display/amdgpu_dm/dc_fpu.c |  6 ++++--
 drivers/gpu/drm/amd/display/dc/dml/Makefile    |  6 ++++++
 drivers/gpu/drm/amd/display/dc/dml2/Makefile   |  6 ++++++
 8 files changed, 53 insertions(+), 14 deletions(-)
 create mode 100644 arch/riscv/Makefile.isa