linux.git/arch/powerpc/sysdev, branch v6.6

Merge tag 'tty-6.6-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty

2023-09-01T16:38:00+00:00

Pull tty/serial driver updates from Greg KH:
 "Here is the big set of tty and serial driver changes for 6.6-rc1.

  Lots of cleanups in here this cycle, and some driver updates. Short
  summary is:

   - Jiri's continued work to make the tty code and apis be a bit more
     sane with regards to modern kernel coding style and types

   - cpm_uart driver updates

   - n_gsm updates and fixes

   - meson driver updates

   - sc16is7xx driver updates

   - 8250 driver updates for different hardware types

   - qcom-geni driver fixes

   - tegra serial driver change

   - stm32 driver updates

   - synclink_gt driver cleanups

   - tty structure size reduction

  All of these have been in linux-next this week with no reported
  issues. The last bit of cleanups from Jiri and the tty structure size
  reduction came in last week, a bit late but as they were just style
  changes and size reductions, I figured they should get into this merge
  cycle so that others can work on top of them with no merge conflicts"

* tag 'tty-6.6-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty: (199 commits)
  tty: shrink the size of struct tty_struct by 40 bytes
  tty: n_tty: deduplicate copy code in n_tty_receive_buf_real_raw()
  tty: n_tty: extract ECHO_OP processing to a separate function
  tty: n_tty: unify counts to size_t
  tty: n_tty: use u8 for chars and flags
  tty: n_tty: simplify chars_in_buffer()
  tty: n_tty: remove unsigned char casts from character constants
  tty: n_tty: move newline handling to a separate function
  tty: n_tty: move canon handling to a separate function
  tty: n_tty: use MASK() for masking out size bits
  tty: n_tty: make n_tty_data::num_overrun unsigned
  tty: n_tty: use time_is_before_jiffies() in n_tty_receive_overrun()
  tty: n_tty: use 'num' for writes' counts
  tty: n_tty: use output character directly
  tty: n_tty: make flow of n_tty_receive_buf_common() a bool
  Revert "tty: serial: meson: Add a earlycon for the T7 SoC"
  Documentation: devices.txt: Fix minors for ttyCPM*
  Documentation: devices.txt: Remove ttySIOC*
  Documentation: devices.txt: Remove ttyIOC*
  serial: 8250_bcm7271: improve bcm7271 8250 port
  ...

Merge tag 'powerpc-6.6-1' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux

2023-08-31T19:43:10+00:00

Pull powerpc updates from Michael Ellerman:

 - Add HOTPLUG_SMT support (/sys/devices/system/cpu/smt) and honour the
   configured SMT state when hotplugging CPUs into the system

 - Combine final TLB flush and lazy TLB mm shootdown IPIs when using the
   Radix MMU to avoid a broadcast TLBIE flush on exit

 - Drop the exclusion between ptrace/perf watchpoints, and drop the now
   unused associated arch hooks

 - Add support for the "nohlt" command line option to disable CPU idle

 - Add support for -fpatchable-function-entry for ftrace, with GCC >=
   13.1

 - Rework memory block size determination, and support 256MB size on
   systems with GPUs that have hotpluggable memory

 - Various other small features and fixes

Thanks to Andrew Donnellan, Aneesh Kumar K.V, Arnd Bergmann, Athira
Rajeev, Benjamin Gray, Christophe Leroy, Frederic Barrat, Gautam
Menghani, Geoff Levand, Hari Bathini, Immad Mir, Jialin Zhang, Joel
Stanley, Jordan Niethe, Justin Stitt, Kajol Jain, Kees Cook, Krzysztof
Kozlowski, Laurent Dufour, Liang He, Linus Walleij, Mahesh Salgaonkar,
Masahiro Yamada, Michal Suchanek, Nageswara R Sastry, Nathan Chancellor,
Nathan Lynch, Naveen N Rao, Nicholas Piggin, Nick Desaulniers, Omar
Sandoval, Randy Dunlap, Reza Arbab, Rob Herring, Russell Currey, Sourabh
Jain, Thomas Gleixner, Trevor Woerner, Uwe Kleine-König, Vaibhav Jain,
Xiongfeng Wang, Yuan Tan, Zhang Rui, and Zheng Zengkai.

* tag 'powerpc-6.6-1' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux: (135 commits)
  macintosh/ams: linux/platform_device.h is needed
  powerpc/xmon: Reapply "Relax frame size for clang"
  powerpc/mm/book3s64: Use 256M as the upper limit with coherent device memory attached
  powerpc/mm/book3s64: Fix build error with SPARSEMEM disabled
  powerpc/iommu: Fix notifiers being shared by PCI and VIO buses
  powerpc/mpc5xxx: Add missing fwnode_handle_put()
  powerpc/config: Disable SLAB_DEBUG_ON in skiroot
  powerpc/pseries: Remove unused hcall tracing instruction
  powerpc/pseries: Fix hcall tracepoints with JUMP_LABEL=n
  powerpc: dts: add missing space before {
  powerpc/eeh: Use pci_dev_id() to simplify the code
  powerpc/64s: Move CPU -mtune options into Kconfig
  powerpc/powermac: Fix unused function warning
  powerpc/pseries: Rework lppaca_shared_proc() to avoid DEBUG_PREEMPT
  powerpc: Don't include lppaca.h in paca.h
  powerpc/pseries: Move hcall_vphn() prototype into vphn.h
  powerpc/pseries: Move VPHN constants into vphn.h
  cxl: Drop unused detach_spa()
  powerpc: Drop zalloc_maybe_bootmem()
  powerpc/powernv: Use struct opal_prd_msg in more places
  ...

powerpc/mpc5xxx: Add missing fwnode_handle_put()

2023-08-24T22:39:30+00:00

In mpc5xxx_fwnode_get_bus_frequency(), we should add
fwnode_handle_put() when break out of the iteration
fwnode_for_each_parent_node() as it will automatically
increase and decrease the refcounter.

Fixes: de06fba62af6 ("powerpc/mpc5xxx: Switch mpc5xxx_get_bus_frequency() to use fwnode")
Signed-off-by: Liang He 
Signed-off-by: Michael Ellerman 
Link: https://msgid.link/20230322030423.1855440-1-windhl@126.com

powerpc: Drop zalloc_maybe_bootmem()

2023-08-24T12:33:16+00:00

The only callers of zalloc_maybe_bootmem() are PCI setup routines. These
used to be called early during boot before slab setup, and also during
runtime due to hotplug.

But commit 5537fcb319d0 ("powerpc/pci: Add ppc_md.discover_phbs()")
moved the boot-time calls later, after slab setup, meaning there's no
longer any need for zalloc_maybe_bootmem(), kzalloc() can be used in all
cases.

Reviewed-by: Christophe Leroy 
Signed-off-by: Michael Ellerman 
Link: https://msgid.link/20230823055430.752550-1-mpe@ellerman.id.au

powerpc/85xx: Mark some functions static and add missing includes to fix no previous prototype error

2023-08-23T05:55:21+00:00

corenet{32/64}_smp_defconfig leads to:

  CC      arch/powerpc/sysdev/ehv_pic.o
arch/powerpc/sysdev/ehv_pic.c:45:6: error: no previous prototype for 'ehv_pic_unmask_irq' [-Werror=missing-prototypes]
   45 | void ehv_pic_unmask_irq(struct irq_data *d)
      |      ^~~~~~~~~~~~~~~~~~
arch/powerpc/sysdev/ehv_pic.c:52:6: error: no previous prototype for 'ehv_pic_mask_irq' [-Werror=missing-prototypes]
   52 | void ehv_pic_mask_irq(struct irq_data *d)
      |      ^~~~~~~~~~~~~~~~
arch/powerpc/sysdev/ehv_pic.c:59:6: error: no previous prototype for 'ehv_pic_end_irq' [-Werror=missing-prototypes]
   59 | void ehv_pic_end_irq(struct irq_data *d)
      |      ^~~~~~~~~~~~~~~
arch/powerpc/sysdev/ehv_pic.c:66:6: error: no previous prototype for 'ehv_pic_direct_end_irq' [-Werror=missing-prototypes]
   66 | void ehv_pic_direct_end_irq(struct irq_data *d)
      |      ^~~~~~~~~~~~~~~~~~~~~~
arch/powerpc/sysdev/ehv_pic.c:71:5: error: no previous prototype for 'ehv_pic_set_affinity' [-Werror=missing-prototypes]
   71 | int ehv_pic_set_affinity(struct irq_data *d, const struct cpumask *dest,
      |     ^~~~~~~~~~~~~~~~~~~~
arch/powerpc/sysdev/ehv_pic.c:112:5: error: no previous prototype for 'ehv_pic_set_irq_type' [-Werror=missing-prototypes]
  112 | int ehv_pic_set_irq_type(struct irq_data *d, unsigned int flow_type)
      |     ^~~~~~~~~~~~~~~~~~~~
  CC      arch/powerpc/sysdev/fsl_rio.o
arch/powerpc/sysdev/fsl_rio.c:102:5: error: no previous prototype for 'fsl_rio_mcheck_exception' [-Werror=missing-prototypes]
  102 | int fsl_rio_mcheck_exception(struct pt_regs *regs)
      |     ^~~~~~~~~~~~~~~~~~~~~~~~
arch/powerpc/sysdev/fsl_rio.c:306:5: error: no previous prototype for 'fsl_map_inb_mem' [-Werror=missing-prototypes]
  306 | int fsl_map_inb_mem(struct rio_mport *mport, dma_addr_t lstart,
      |     ^~~~~~~~~~~~~~~
arch/powerpc/sysdev/fsl_rio.c:357:6: error: no previous prototype for 'fsl_unmap_inb_mem' [-Werror=missing-prototypes]
  357 | void fsl_unmap_inb_mem(struct rio_mport *mport, dma_addr_t lstart)
      |      ^~~~~~~~~~~~~~~~~
arch/powerpc/sysdev/fsl_rio.c:445:5: error: no previous prototype for 'fsl_rio_setup' [-Werror=missing-prototypes]
  445 | int fsl_rio_setup(struct platform_device *dev)
      |     ^~~~~~~~~~~~~
  CC      arch/powerpc/sysdev/fsl_rmu.o
arch/powerpc/sysdev/fsl_rmu.c:362:6: error: no previous prototype for 'msg_unit_error_handler' [-Werror=missing-prototypes]
  362 | void msg_unit_error_handler(void)
      |      ^~~~~~~~~~~~~~~~~~~~~~
  CC      arch/powerpc/platforms/85xx/corenet_generic.o
arch/powerpc/platforms/85xx/corenet_generic.c:33:13: error: no previous prototype for 'corenet_gen_pic_init' [-Werror=missing-prototypes]
   33 | void __init corenet_gen_pic_init(void)
      |             ^~~~~~~~~~~~~~~~~~~~
arch/powerpc/platforms/85xx/corenet_generic.c:51:13: error: no previous prototype for 'corenet_gen_setup_arch' [-Werror=missing-prototypes]
   51 | void __init corenet_gen_setup_arch(void)
      |             ^~~~~~~~~~~~~~~~~~~~~~
arch/powerpc/platforms/85xx/corenet_generic.c:104:12: error: no previous prototype for 'corenet_gen_publish_devices' [-Werror=missing-prototypes]
  104 | int __init corenet_gen_publish_devices(void)
      |            ^~~~~~~~~~~~~~~~~~~~~~~~~~~
  CC      arch/powerpc/platforms/85xx/qemu_e500.o
arch/powerpc/platforms/85xx/qemu_e500.c:28:13: error: no previous prototype for 'qemu_e500_pic_init' [-Werror=missing-prototypes]
   28 | void __init qemu_e500_pic_init(void)
      |             ^~~~~~~~~~~~~~~~~~
  CC      arch/powerpc/kernel/pmc.o
arch/powerpc/kernel/pmc.c:78:6: error: no previous prototype for 'power4_enable_pmcs' [-Werror=missing-prototypes]
   78 | void power4_enable_pmcs(void)
      |      ^~~~~~~~~~~~~~~~~~

Signed-off-by: Christophe Leroy 
Signed-off-by: Michael Ellerman 
Link: https://msgid.link/c90780017b624b91771a3e4240dcbadc68137915.1692684784.git.christophe.leroy@csgroup.eu

powerpc/fsl_pci: Make fsl_add_bridge() static

2023-08-18T07:03:13+00:00

Since commit 905e75c46dba ("powerpc/fsl-pci: Unify pci/pcie initialization code")
fsl_add_bridge() is not used anymore outside of fsl_pci.c

Make it static.

Signed-off-by: Christophe Leroy 
Signed-off-by: Michael Ellerman 
Link: https://msgid.link/2115e3597d81e72a865820af54f0e290d0fd2b3a.1692199186.git.christophe.leroy@csgroup.eu

powerpc/xics: Remove unnecessary endian conversion

2023-08-16T13:54:48+00:00

Remove an unnecessary piece of code that does an endianness conversion
but does not use the result. The following warning was reported by
Clang's static analyzer:

  arch/powerpc/sysdev/xics/ics-opal.c:114:2: warning: Value stored to
  'server' is never read [deadcode.DeadStores]
  server = be16_to_cpu(oserver);

'server' was used as a parameter to opal_get_xive() in commit
5c7c1e9444d8 ("powerpc/powernv: Add OPAL ICS backend") when it was
introduced. 'server' was also used in an error message for the call to
opal_get_xive().

'server' was always later set by a call to ics_opal_mangle_server()
before being used.

Commit bf8e0f891a32 ("powerpc/powernv: Fix endian issues in OPAL ICS
backend") used a new variable 'oserver' as the parameter to
opal_get_xive() instead of 'server' for endian correctness. It also
removed 'server' from the error message for the call to opal_get_xive().

Fix the warning by removing the server variable assignment.

Fixes: bf8e0f891a32 ("powerpc/powernv: Fix endian issues in OPAL ICS backend")
Reviewed-by: Jordan Niethe 
Signed-off-by: Gautam Menghani 
Signed-off-by: Michael Ellerman 
Link: https://msgid.link/20230731115543.36991-1-gautam@linux.ibm.com

powerpc: replace #include with #include

2023-08-16T13:54:48+00:00

Commit ddb5cdbafaaa ("kbuild: generate KSYMTAB entries by modpost")
deprecated , which is now a wrapper of .

Replace #include  with #include .

After all the  lines are converted,  and
 will be removed.

Signed-off-by: Masahiro Yamada 
[mpe: Fixup selftests that stub asm/export.h]
Signed-off-by: Michael Ellerman 
Link: https://msgid.link/20230806150954.394189-2-masahiroy@kernel.org

powerpc/cpm2: Remove cpm2_map() and cpm2_unmap()

2023-08-16T13:54:47+00:00

Since commit 449012daa92a ("[POWERPC] cpm2: Infrastructure code
cleanup.") cpm2_map() is just returning cpm2_immr pointer and
cpm2_unmap() does nothing.

We already have parts of code that use cpm2_immr directly so get rid
of cpm2_map() and cpm2_unmap() by using cpm2_immr directly. And avoid
going through local pointers that hide the pointed structure.

Signed-off-by: Christophe Leroy 
Signed-off-by: Michael Ellerman 
Link: https://msgid.link/9fe6ff7284e9f968b12abe7de7c08d7ea40e29d6.1691474658.git.christophe.leroy@csgroup.eu

powerpc/include: Remove mpc8260.h and m82xx_pci.h

2023-08-16T13:54:47+00:00

SIU_INT_IRQ1 is not used anywhere and __IO_BASE is defined in
asm/io.h

Remove m82xx_pci.h

Then the only thing remaining in mpc8260.h is MPC82XX_BCR_PLDP

Move MPC82XX_BCR_PLDP into asm/cpm2.h then remove mpc8260.h

Signed-off-by: Christophe Leroy 
Signed-off-by: Michael Ellerman 
Link: https://msgid.link/afe23bf3624c389ff17e9789884c78c124b7b202.1691474658.git.christophe.leroy@csgroup.eu