linux-toradex.git/arch/mips/kernel/traps.c, branch v6.19

MIPS: rename rollback_handler with skipover_handler

2025-04-27T08:12:44+00:00

Recently the rollback region has been changed into an
idle interrupt region [1]. This patch make the appropriate
changes renaming functions and macro, to reflect the change.

[1] https://lore.kernel.org/linux-mips/20250403161143.361461-2-marco.crivellari@suse.com/

Signed-off-by: Marco Crivellari 
Signed-off-by: Thomas Bogendoerfer

MIPS: traps: Use str_enabled_disabled() in parity_protection_init()

2025-01-11T11:38:54+00:00

Remove hard-coded strings by using the str_enabled_disabled() helper
function.

Use pr_info() instead of printk(KERN_INFO) to silence multiple
checkpatch warnings.

Suggested-by: Christophe JAILLET 
Signed-off-by: Thorsten Blum 
Reviewed-by: Philippe Mathieu-Daudé 
Signed-off-by: Thomas Bogendoerfer

MIPS: kernel: Rename read/write_c0_ecc to read/writec0_errctl

2025-01-11T11:31:21+00:00

CP0 register 26 is used as ECC register for legacy cores, but newer
cores (MIPS32/MIPS64) use it as an ErrCtl register. Since the kernel only
uses CP0 26 as ErrCtl register rename the access functions to the more
fitting name.

Signed-off-by: Thomas Bogendoerfer 
Reviewed-by: Maciej W. Rozycki 
Signed-off-by: Thomas Bogendoerfer

MIPS: traps: Give more explanations if ebase doesn't belong to KSEG0

2024-02-20T11:44:59+00:00

With the expanded support for placing the kernel in XPHYS rather than
just KSEG0, scenarios where ebase doesn't belong to KSEG0 are more
likely to occur. In such cases, we currently experience a substantial
and perplexing stack dump without any accompanying explanation. To
rectify this, we aim to replace the uninformative stack dump with a
warning that offers a clear explanation of the issue.

Reviewed-by: Jiaxun Yang 
Signed-off-by: Gregory CLEMENT 
Signed-off-by: Thomas Bogendoerfer

MIPS: Fix set_uncached_handler for ebase in XKPHYS

2024-02-20T11:44:59+00:00

ebase might reside in XKPHYS if memblock is unable to allocate memory
within the KSEG0 physical range.

To map EBASE into uncached space, we convert it back to its physical
address and utilize the new CKSEG1ADDR_OR_64BIT helper for mapping.

Co-developed-by: Vladimir Kondratiev 
Signed-off-by: Vladimir Kondratiev 
Co-developed-by: Gregory CLEMENT 
Signed-off-by: Jiaxun Yang 
Signed-off-by: Gregory CLEMENT 
Signed-off-by: Thomas Bogendoerfer

MIPS: traps: Use GPR number macros

2024-02-20T11:41:52+00:00

Use GPR number macros in uasm code generation parts to
reduce code duplication.

No functional change.

Signed-off-by: Jiaxun Yang 
Signed-off-by: Thomas Bogendoerfer

MIPS: reserve exception vector space ONLY ONCE

2024-01-26T09:33:34+00:00

"cpu_probe" is called both by BP and APs, but reserving exception vector
(like 0x0-0x1000) called by "cpu_probe" need once and calling on APs is
too late since memblock is unavailable at that time.

So, reserve exception vector ONLY by BP.

Suggested-by: Thomas Bogendoerfer 
Signed-off-by: Huang Pei 
Signed-off-by: Thomas Bogendoerfer

Merge tag 'mips_6.8' of git://git.kernel.org/pub/scm/linux/kernel/git/mips/linux

2024-01-17T19:20:50+00:00

Pull MIPS updates from Thomas Bogendoerfer:
 "Just cleanups and fixes"

* tag 'mips_6.8' of git://git.kernel.org/pub/scm/linux/kernel/git/mips/linux:
  MIPS: Alchemy: Fix an out-of-bound access in db1550_dev_setup()
  MIPS: Alchemy: Fix an out-of-bound access in db1200_dev_setup()
  MIPS: Fix typos
  MIPS: Remove unused shadow GPR support from vector irq setup
  MIPS: Allow vectored interrupt handler to reside everywhere for 64bit
  mips: Set dump-stack arch description
  mips: mm: add slab availability checking in ioremap_prot
  mips: Optimize max_mapnr init procedure
  mips: Fix max_mapnr being uninitialized on early stages
  mips: Fix incorrect max_low_pfn adjustment
  mips: dmi: Fix early remap on MIPS32
  MIPS: compressed: Use correct instruction for 64 bit code
  MIPS: SGI-IP27: hubio: fix nasid kernel-doc warning
  MAINTAINERS: Add myself as maintainer of the Ralink architecture

MIPS: Fix typos

2024-01-08T09:39:12+00:00

Fix typos, most reported by "codespell arch/mips".  Only touches comments,
no code changes.

Signed-off-by: Bjorn Helgaas 
Cc: linux-mips@vger.kernel.org
Reviewed-by: Randy Dunlap 
Signed-off-by: Thomas Bogendoerfer

MIPS: Remove unused shadow GPR support from vector irq setup

2023-12-30T14:36:25+00:00

Using shadow GPRs for vectored interrupts has never been used,
time to remove it.

Signed-off-by: Thomas Bogendoerfer