linux-toradex.git/arch/powerpc/boot, branch v6.16

powerpc: dts: mpc8315erdb: Add GPIO controller node

2025-06-13T07:02:21+00:00

The MPC8315E SoC and variants have a GPIO controller at IMMR + 0xc00.
This node was previously missing from the device tree.

Signed-off-by: J. Neuschäfer 
Signed-off-by: Madhavan Srinivasan 
Link: https://patch.msgid.link/20250611-mpc-gpio-v1-1-02d1f75336e2@posteo.net

powerpc/microwatt: Fix model property in device tree

2025-06-13T07:01:27+00:00

The standard property for the model name is called "model".

Signed-off-by: J. Neuschäfer 
Signed-off-by: Madhavan Srinivasan 
Link: https://patch.msgid.link/20250611-microwatt-v2-1-80847bbc5f9c@posteo.net

Merge tag 'powerpc-6.16-1' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux

2025-05-26T21:38:57+00:00

Pull powerpc updates from Madhavan Srinivasan:

 - Support for dynamic preemption

 - Migrate powerpc boards GPIO driver to new setter API

 - Added new PMU for KVM host-wide measurement

 - Enhancement to htmdump driver to support more functions

 - Added character device for couple RTAS supported APIs

 - Minor fixes and cleanup

Thanks to Amit Machhiwal, Athira Rajeev, Bagas Sanjaya, Bartosz
Golaszewski, Christophe Leroy, Eddie James, Gaurav Batra, Gautam
Menghani, Geert Uytterhoeven, Haren Myneni, Hari Bathini, Jiri Slaby
(SUSE), Linus Walleij, Michal Suchanek, Naveen N Rao (AMD), Nilay
Shroff, Ricardo B. Marlière, Ritesh Harjani (IBM), Sathvika Vasireddy,
Shrikanth Hegde, Stephen Rothwell, Sourabh Jain, Thorsten Blum, Vaibhav
Jain, Venkat Rao Bagalkote, and Viktor Malik.

* tag 'powerpc-6.16-1' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux: (52 commits)
  MAINTAINERS: powerpc: Remove myself as a reviewer
  powerpc/iommu: Use str_disabled_enabled() helper
  powerpc/powermac: Use str_enabled_disabled() and str_on_off() helpers
  powerpc/mm/fault: Use str_write_read() helper function
  powerpc: Replace strcpy() with strscpy() in proc_ppc64_init()
  powerpc/pseries/iommu: Fix kmemleak in TCE table userspace view
  powerpc/kernel: Fix ppc_save_regs inclusion in build
  powerpc: Transliterate author name and remove FIXME
  powerpc/pseries/htmdump: Include header file to get is_kvm_guest() definition
  KVM: PPC: Book3S HV: Fix IRQ map warnings with XICS on pSeries KVM Guest
  powerpc/8xx: Reduce alignment constraint for kernel memory
  powerpc/boot: Fix build with gcc 15
  powerpc/pseries/htmdump: Add documentation for H_HTM debugfs interface
  powerpc/pseries/htmdump: Add htm capabilities support to htmdump module
  powerpc/pseries/htmdump: Add htm flags support to htmdump module
  powerpc/pseries/htmdump: Add htm setup support to htmdump module
  powerpc/pseries/htmdump: Add htm info support to htmdump module
  powerpc/pseries/htmdump: Add htm status support to htmdump module
  powerpc/pseries/htmdump: Add htm start support to htmdump module
  powerpc/pseries/htmdump: Add htm configure support to htmdump module
  ...

powerpc: Transliterate author name and remove FIXME

2025-05-14T03:38:16+00:00

The name is Mimi Phuong-Thao Vo.

Signed-off-by: Thorsten Blum 
Signed-off-by: Madhavan Srinivasan 
Link: https://patch.msgid.link/20241110162139.5179-2-thorsten.blum@linux.dev

powerpc/boot: Fix build with gcc 15

2025-05-06T03:01:09+00:00

Similar to x86 the ppc boot code does not build with GCC 15.

Copy the fix from
commit ee2ab467bddf ("x86/boot: Use '-std=gnu11' to fix build with GCC 15")

Signed-off-by: Michal Suchanek 
Tested-by: Amit Machhiwal 
Tested-by: Venkat Rao Bagalkote 
Signed-off-by: Madhavan Srinivasan 
Link: https://patch.msgid.link/20250331105722.19709-1-msuchanek@suse.de

powerpc/boot: Fix dash warning

2025-04-24T06:55:39+00:00

'commit b2accfe7ca5b ("powerpc/boot: Check for ld-option support")' suppressed
linker warnings, but the expressed used did not go well with POSIX shell (dash)
resulting with this warning

arch/powerpc/boot/wrapper: 237: [: 0: unexpected operator
ld: warning: arch/powerpc/boot/zImage.epapr has a LOAD segment with RWX permissions

Fix the check to handle the reported warning. Patch also fixes
couple of shellcheck reported errors for the same line.

In arch/powerpc/boot/wrapper line 237:
if [ $(${CROSS}ld -v --no-warn-rwx-segments &>/dev/null; echo $?) -eq 0 ]; then
     ^-- SC2046 (warning): Quote this to prevent word splitting.
       ^------^ SC2086 (info): Double quote to prevent globbing and word splitting.
                                            ^---------^ SC3020 (warning): In POSIX sh, &> is undefined.

Fixes: b2accfe7ca5b ("powerpc/boot: Check for ld-option support")
Reported-by: Stephen Rothwell 
Suggested-by: Stephen Rothwell 
Tested-by: Venkat Rao Bagalkote 
Reviewed-by: Stephen Rothwell 
Signed-off-by: Madhavan Srinivasan 
Link: https://patch.msgid.link/20250423082154.30625-1-maddy@linux.ibm.com

powerpc/boot: Check for ld-option support

2025-04-16T11:38:08+00:00

Commit 579aee9fc594 ("powerpc: suppress some linker warnings in recent linker versions")
enabled support to add linker option "--no-warn-rwx-segments",
if the version is greater than 2.39. Similar build warning were
reported recently from linker version 2.35.2.

ld: warning: arch/powerpc/boot/zImage.epapr has a LOAD segment with RWX permissions
ld: warning: arch/powerpc/boot/zImage.pseries has a LOAD segment with RWX permissions

Fix the warning by checking for "--no-warn-rwx-segments"
option support in linker to enable it, instead of checking
for the version range.

Fixes: 579aee9fc594 ("powerpc: suppress some linker warnings in recent linker versions")
Reported-by: Venkat Rao Bagalkote 
Suggested-by: Christophe Leroy 
Tested-by: Venkat Rao Bagalkote 
Closes: https://lore.kernel.org/linuxppc-dev/61cf556c-4947-4bd6-af63-892fc0966dad@linux.ibm.com/
Signed-off-by: Madhavan Srinivasan 
Link: https://patch.msgid.link/20250401004218.24869-1-maddy@linux.ibm.com

powerpc/microwatt: Add SMP support

2025-02-26T15:46:48+00:00

This adds support for Microwatt systems with more than one core, and
updates the device tree for a 2-core version.

The secondary CPUs are started and sent to spin in __secondary_hold
very early on, in the platform probe function.  The reason for doing
this is so that they are there when smp_release_cpus() gets called,
which is before the platform init_smp function or even the platform
setup_arch function gets called.

Note that having two CPUs in the device tree doesn't preclude
operation with only one CPU.  The SYSCON_CPU_CTRL register has a
read-only field which indicates the number of CPU cores, so
microwatt_init_smp() will only start as many CPU cores as are present
in the system, and any extra CPU device-tree nodes will just be
ignored.

Signed-off-by: Paul Mackerras 
Signed-off-by: Madhavan Srinivasan 
Link: https://patch.msgid.link/Z5xt8aooKyXZv6Kf@thinks.paulus.ozlabs.org

powerpc/microwatt: Device-tree updates

2025-02-26T15:46:48+00:00

Microwatt now implements ISA v3.1 (SFFS compliancy subset), including
prefixed instructions, scv/rfscv, and the FSCR, HFSCR, TAR, and CTRL
registers.  The privileged mode of operation is now hypervisor mode
and there is no privileged non-hypervisor mode; the MSR[HV] bit is
forced to 1.

Besides updating the ibm,powerpc-cpu-features property to reflect the
above, this also makes the following changes relating to peripheral
devices:

- Add gpio controller.
- Remove high-speed property from SD controller, for the case where
  the interface is connected through 200 ohm protection resisters.
- Put an alias for the ethernet in /chosen.

Signed-off-by: Paul Mackerras 
Acked-by: Nicholas Piggin 
Signed-off-by: Madhavan Srinivasan 
Link: https://patch.msgid.link/Z5xtdGSacrWz7swi@thinks.paulus.ozlabs.org

powerpc: Remove IBM_CELL_BLADE & SPIDER_NET references

2025-02-26T15:45:07+00:00

The symbols are no longer selectable so remove references to them.

Signed-off-by: Michael Ellerman 
Signed-off-by: Madhavan Srinivasan 
Link: https://patch.msgid.link/20241218105523.416573-4-mpe@ellerman.id.au