[Bug 1995137] Re: Add "sun4i-drm_dri.so" to libg1-mesa-dri and fix compilation on riscv64

[Timo Aaltonen]

** Description changed:

  [Impact]
  
- lima driver is missing from riscv64, but we also need to disable JIT
- which then means using non-llvmpipe swrast. JIT for riscv64 is buggy and
- should be fixed in a future llvm release.
+ lima driver is missing from riscv64, but in order to enable it we need
+ to disable anything that uses JIT on riscv64: swrast for vulkan, and
+ draw-use-llvm for gallium.
+ 
+ JIT for riscv64 is buggy and should be fixed in a future llvm release.
  
  [Test case]
  
  Check that sun4i-drm_dri.so is in libgl1-mesa-dri deb for riscv64, and
  that it works.
  
  [Where things could go wrong]
  
  This is a new driver for the architecture, so there's little chance of
  breakage.
  
  --
  
  "sun4i-drm_dri.so" is needed for some RISC-V platforms such as the
  Allwinner D1. This file is missing from the riscv64 packages, but
  present on others.  This affects (at least) 20.04 and 22.04.
  
  itrue at lxc-focal ~/tmp> dpkg -c libgl1-mesa-dri_21.2.6-0ubuntu0.1~20.04.2_arm64.deb | grep _dri.so
  *snip*
  hrw-r--r-- root/root         0 2022-03-08 16:37 ./usr/lib/aarch64-linux-gnu/dri/sun4i-drm_dri.so link to ./usr/lib/aarch64-linux-gnu/dri/armada-drm_dri.so
  *snip*
  
  itrue at lxc-focal ~/tmp> dpkg -c libgl1-mesa-dri_21.2.6-0ubuntu0.1~20.04.2_riscv64.deb | grep _dri.so
  -rw-r--r-- root/root  16498024 2022-03-08 16:37 ./usr/lib/riscv64-linux-gnu/dri/kms_swrast_dri.so
  hrw-r--r-- root/root         0 2022-03-08 16:37 ./usr/lib/riscv64-linux-gnu/dri/nouveau_dri.so link to ./usr/lib/riscv64-linux-gnu/dri/kms_swrast_dri.so
  -rw-r--r-- root/root   4692400 2022-03-08 16:37 ./usr/lib/riscv64-linux-gnu/dri/nouveau_vieux_dri.so
  hrw-r--r-- root/root         0 2022-03-08 16:37 ./usr/lib/riscv64-linux-gnu/dri/r200_dri.so link to ./usr/lib/riscv64-linux-gnu/dri/nouveau_vieux_dri.so
  hrw-r--r-- root/root         0 2022-03-08 16:37 ./usr/lib/riscv64-linux-gnu/dri/r300_dri.so link to ./usr/lib/riscv64-linux-gnu/dri/kms_swrast_dri.so
  hrw-r--r-- root/root         0 2022-03-08 16:37 ./usr/lib/riscv64-linux-gnu/dri/r600_dri.so link to ./usr/lib/riscv64-linux-gnu/dri/kms_swrast_dri.so
  hrw-r--r-- root/root         0 2022-03-08 16:37 ./usr/lib/riscv64-linux-gnu/dri/radeon_dri.so link to ./usr/lib/riscv64-linux-gnu/dri/nouveau_vieux_dri.so
  hrw-r--r-- root/root         0 2022-03-08 16:37 ./usr/lib/riscv64-linux-gnu/dri/radeonsi_dri.so link to ./usr/lib/riscv64-linux-gnu/dri/kms_swrast_dri.so
  hrw-r--r-- root/root         0 2022-03-08 16:37 ./usr/lib/riscv64-linux-gnu/dri/swrast_dri.so link to ./usr/lib/riscv64-linux-gnu/dri/kms_swrast_dri.so
  hrw-r--r-- root/root         0 2022-03-08 16:37 ./usr/lib/riscv64-linux-gnu/dri/virtio_gpu_dri.so link to ./usr/lib/riscv64-linux-gnu/dri/kms_swrast_dri.so
  hrw-r--r-- root/root         0 2022-03-08 16:37 ./usr/lib/riscv64-linux-gnu/dri/zink_dri.so link to ./usr/lib/riscv64-linux-gnu/dri/kms_swrast_dri.so

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https://bugs.launchpad.net/bugs/1995137

Title:
  Add "sun4i-drm_dri.so" to libg1-mesa-dri and fix compilation on
  riscv64

Status in mesa package in Ubuntu:
  Fix Released
Status in mesa source package in Jammy:
  New
Status in mesa source package in Kinetic:
  New

Bug description:
  [Impact]

  lima driver is missing from riscv64, but in order to enable it we need
  to disable anything that uses JIT on riscv64: swrast for vulkan, and
  draw-use-llvm for gallium.

  JIT for riscv64 is buggy and should be fixed in a future llvm release.

  [Test case]

  Check that sun4i-drm_dri.so is in libgl1-mesa-dri deb for riscv64, and
  that it works.

  [Where things could go wrong]

  This is a new driver for the architecture, so there's little chance of
  breakage.

  --

  "sun4i-drm_dri.so" is needed for some RISC-V platforms such as the
  Allwinner D1. This file is missing from the riscv64 packages, but
  present on others.  This affects (at least) 20.04 and 22.04.

  itrue at lxc-focal ~/tmp> dpkg -c libgl1-mesa-dri_21.2.6-0ubuntu0.1~20.04.2_arm64.deb | grep _dri.so
  *snip*
  hrw-r--r-- root/root         0 2022-03-08 16:37 ./usr/lib/aarch64-linux-gnu/dri/sun4i-drm_dri.so link to ./usr/lib/aarch64-linux-gnu/dri/armada-drm_dri.so
  *snip*

  itrue at lxc-focal ~/tmp> dpkg -c libgl1-mesa-dri_21.2.6-0ubuntu0.1~20.04.2_riscv64.deb | grep _dri.so
  -rw-r--r-- root/root  16498024 2022-03-08 16:37 ./usr/lib/riscv64-linux-gnu/dri/kms_swrast_dri.so
  hrw-r--r-- root/root         0 2022-03-08 16:37 ./usr/lib/riscv64-linux-gnu/dri/nouveau_dri.so link to ./usr/lib/riscv64-linux-gnu/dri/kms_swrast_dri.so
  -rw-r--r-- root/root   4692400 2022-03-08 16:37 ./usr/lib/riscv64-linux-gnu/dri/nouveau_vieux_dri.so
  hrw-r--r-- root/root         0 2022-03-08 16:37 ./usr/lib/riscv64-linux-gnu/dri/r200_dri.so link to ./usr/lib/riscv64-linux-gnu/dri/nouveau_vieux_dri.so
  hrw-r--r-- root/root         0 2022-03-08 16:37 ./usr/lib/riscv64-linux-gnu/dri/r300_dri.so link to ./usr/lib/riscv64-linux-gnu/dri/kms_swrast_dri.so
  hrw-r--r-- root/root         0 2022-03-08 16:37 ./usr/lib/riscv64-linux-gnu/dri/r600_dri.so link to ./usr/lib/riscv64-linux-gnu/dri/kms_swrast_dri.so
  hrw-r--r-- root/root         0 2022-03-08 16:37 ./usr/lib/riscv64-linux-gnu/dri/radeon_dri.so link to ./usr/lib/riscv64-linux-gnu/dri/nouveau_vieux_dri.so
  hrw-r--r-- root/root         0 2022-03-08 16:37 ./usr/lib/riscv64-linux-gnu/dri/radeonsi_dri.so link to ./usr/lib/riscv64-linux-gnu/dri/kms_swrast_dri.so
  hrw-r--r-- root/root         0 2022-03-08 16:37 ./usr/lib/riscv64-linux-gnu/dri/swrast_dri.so link to ./usr/lib/riscv64-linux-gnu/dri/kms_swrast_dri.so
  hrw-r--r-- root/root         0 2022-03-08 16:37 ./usr/lib/riscv64-linux-gnu/dri/virtio_gpu_dri.so link to ./usr/lib/riscv64-linux-gnu/dri/kms_swrast_dri.so
  hrw-r--r-- root/root         0 2022-03-08 16:37 ./usr/lib/riscv64-linux-gnu/dri/zink_dri.so link to ./usr/lib/riscv64-linux-gnu/dri/kms_swrast_dri.so

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