linux-kernel - [PATCH v1 0/5] drm/panthor: Implement fault information propagation

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Message-Id: <20251215115457.2137485-1-lukas.zapolskas@arm.com>
Date: Mon, 15 Dec 2025 11:54:52 +0000
From: Lukas Zapolskas <lukas.zapolskas@....com>
To: Boris Brezillon <boris.brezillon@...labora.com>,
	Liviu Dudau <liviu.dudau@....com>,
	Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>,
	Maxime Ripard <mripard@...nel.org>,
	Thomas Zimmermann <tzimmermann@...e.de>,
	David Airlie <airlied@...il.com>,
	Simona Vetter <simona@...ll.ch>
Cc: nd@....com,
	dri-devel@...ts.freedesktop.org,
	linux-kernel@...r.kernel.org,
	Lukas Zapolskas <lukas.zapolskas@....com>
Subject: [PATCH v1 0/5] drm/panthor: Implement fault information propagation

The Panthor CSF firmware and hardware interfaces provide additional
metadata when faults occur. In particular, there are three relevant
categories of faults here:
* faults raised at the address space level. These are fatal and each
  group bound to that AS is affected.
* fatal faults raised on one of the queues in that group, preventing
  further submissions on the group.
* recoverable faults raised on one of the queues in that group.
  The queue may progress further after this point, so multiple such
  faults may be generated.
Each of these categories provides fault information containing
sources of the error, read/write/execute bits and potentially virtual
addresses at which these faults occurred.

This series extends the GROUP_GET_STATE ioctl to propagate the fault
metadata to enable the VK_EXT_device_fault(3) extension.

Lukas Zapolskas (4):
  drm/panthor: Store queue fault and fatal information
  drm/panthor: Track VM faults
  drm/panthor: Propagate VM-level faults to groups
  drm/panthor: Use GROUP_GET_STATE to provide group and queue errors

Paul Toadere (1):
  drm/panthor: Implement CS_FAULT propagation to userspace

 drivers/gpu/drm/panthor/panthor_drv.c   |  85 ++++++++-
 drivers/gpu/drm/panthor/panthor_mmu.c   |  24 ++-
 drivers/gpu/drm/panthor/panthor_mmu.h   |  22 +++
 drivers/gpu/drm/panthor/panthor_regs.h  |   3 +
 drivers/gpu/drm/panthor/panthor_sched.c | 237 ++++++++++++++++++++----
 drivers/gpu/drm/panthor/panthor_sched.h |   4 +-
 include/uapi/drm/panthor_drm.h          |  52 +++++-
 7 files changed, 378 insertions(+), 49 deletions(-)

--
2.33.0.dirty