Already in v6.15-rc6. Assume will be in linux/questing later.
** Description changed:
[SRU Justification]
[ Impact ]
AMD Strix Halo devices experience unexpected reboots while starting GUI
session every boot.
This is caused by:
* 689275140cb8e drm/amdgpu/hdp7.0: do a posting read when flushing HDP
* abe1cbaec6cfe drm/amdgpu/hdp6.0: do a posting read when flushing HDP
* f756dbac1ce1d drm/amdgpu/hdp5.2: do a posting read when flushing HDP
* cf424020e040b drm/amdgpu/hdp5.0: do a posting read when flushing HDP
* c9b8dcabb52af drm/amdgpu/hdp4.0: do a posting read when flushing HDP
And fixed by:
* 5a11a27677311 drm/amdgpu/hdp7: use memcfg register to post the write for
HDP flush
* ca28e80abe421 drm/amdgpu/hdp6: use memcfg register to post the write for
HDP flush
* dbc988c689333 drm/amdgpu/hdp5.2: use memcfg register to post the write for
HDP flush
* 0e33e0f339b91 drm/amdgpu/hdp5: use memcfg register to post the write for
HDP flush
* f690e3974755a drm/amdgpu/hdp4: use memcfg register to post the write for
HDP flush
[ Test Plan ]
1. Install -proposed kernel
2. Reboot to the installed kernel and check if the device may finish boot
process to GUI session.
[ Where problems could occur ]
No. This fix a problem when reading back the whole mapped
KFD_MMIO_REMAP_HDP_MEM_FLUSH_CNTL register by reading another register
that also triggers the flush.
[ Other Info ]
- The causing commits were first committed to v6.13-rc1 , and have also been
backported to v6.12.5, v6.6.69, v6.1.120. The fixes are available in v5.15-rc6,
also backported to v6.14.7, v6.12.29, v6.6.91, v6.1.139, therefore this affects
following Ubuntu kernels:
+ The causing commits were first committed to v6.13-rc1 , and have also been
backported to v6.12.5, v6.6.69, v6.1.120. The fixes are available in v6.15-rc6,
also backported to v6.14.7, v6.12.29, v6.6.91, v6.1.139, therefore this affects
following Ubuntu kernels:
* linux-unstable/questing: latest (currently 6.15.0-2.2)
* linux/plucky: all (currently 6.14.0-22.22)
* linux-oem-6.14/noble: all (currently 6.14.0-1005.5)
* linux/oracular: 6.11.0-20.20 to latest (currently 6.11.0-28.28)
* linux-oem-6.11/noble: 6.11.0-1017.17 to latest (currently 6.11.0-1024.24)
* linux/noble: 6.8.0-58.60 to latest (currently 6.8.0-62.65)
* linux-oem-6.8/noble: 6.8.0-1026.26 to latest (currently 6.8.0-1029.29)
Nominate for linux/noble, linux-oem-6.8/noble, linux/oracular, linux-
oem-6.11/noble, linux/plucky, linux-oem-6.14/noble, and linux-unstable.
========== original bug report ==========
With 5 v6.13-rc1 commits , also backported to v6.12.5, v6.6.69, v6.1.120,
some (at least AMD Strix Halo) devices may experience unexpected reboots while
starting GUI session every boot:
* 689275140cb8e drm/amdgpu/hdp7.0: do a posting read when flushing HDP
* abe1cbaec6cfe drm/amdgpu/hdp6.0: do a posting read when flushing HDP
* f756dbac1ce1d drm/amdgpu/hdp5.2: do a posting read when flushing HDP
* cf424020e040b drm/amdgpu/hdp5.0: do a posting read when flushing HDP
* c9b8dcabb52af drm/amdgpu/hdp4.0: do a posting read when flushing HDP
- The fixes are available in v5.15-rc6, also backported to v6.14.7, v6.12.29,
v6.6.91, v6.1.139:
+ The fixes are available in v6.15-rc6, also backported to v6.14.7, v6.12.29,
v6.6.91, v6.1.139:
* 5a11a27677311 drm/amdgpu/hdp7: use memcfg register to post the write for
HDP flush
* ca28e80abe421 drm/amdgpu/hdp6: use memcfg register to post the write for
HDP flush
* dbc988c689333 drm/amdgpu/hdp5.2: use memcfg register to post the write for
HDP flush
* 0e33e0f339b91 drm/amdgpu/hdp5: use memcfg register to post the write for
HDP flush
* f690e3974755a drm/amdgpu/hdp4: use memcfg register to post the write for
HDP flush
This affects following Ubuntu kernels:
* linux-unstable/questing: latest (currently 6.15.0-2.2)
* linux/plucky: all (currently 6.14.0-22.22)
* linux-oem-6.14/noble: all (currently 6.14.0-1005.5)
* linux/oracular: 6.11.0-20.20 to latest (currently 6.11.0-28.28)
* linux-oem-6.11/noble: 6.11.0-1017.17 to latest (currently 6.11.0-1024.24)
* linux/noble: 6.8.0-58.60 to latest (currently 6.8.0-62.65)
* linux-oem-6.8/noble: 6.8.0-1026.26 to latest (currently 6.8.0-1029.29)
** Changed in: linux (Ubuntu Questing)
Status: Confirmed => Fix Released
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https://bugs.launchpad.net/bugs/2112462
Title:
Unexpected system reboot at loading GUI session on some AMD platforms
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