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

Merge tag 'powerpc-6.16-3' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux

2025-06-16T15:49:58+00:00

Pull powerpc fixes from Madhavan Srinivasan:

 - Fix to handle VDSO32 with pcrel

 - Couple of dts fixes in microwatt and mpc8315erdb

 - Fix to handle PE bridge reconfiguration in VFIO EEH recovery path

 - Fix ioctl macros related to struct termio

Thanks to Christophe Leroy, Ganesh Goudar, J.  Neuschäfer, Justin M.
Forbes, Michael Ellerman, Narayana Murty N, Tulio Magno, and Vaibhav
Jain

* tag 'powerpc-6.16-3' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux:
  powerpc: Fix struct termio related ioctl macros
  powerpc: dts: mpc8315erdb: Add GPIO controller node
  powerpc/microwatt: Fix model property in device tree
  powerpc/eeh: Fix missing PE bridge reconfiguration during VFIO EEH recovery
  powerpc/vdso: Fix build of VDSO32 with pcrel

powerpc: Fix struct termio related ioctl macros

2025-06-13T16:48:50+00:00

Since termio interface is now obsolete, include/uapi/asm/ioctls.h
has some constant macros referring to "struct termio", this caused
build failure at userspace.

In file included from /usr/include/asm/ioctl.h:12,
                 from /usr/include/asm/ioctls.h:5,
                 from tst-ioctls.c:3:
tst-ioctls.c: In function 'get_TCGETA':
tst-ioctls.c:12:10: error: invalid application of 'sizeof' to incomplete type 'struct termio'
   12 |   return TCGETA;
      |          ^~~~~~

Even though termios.h provides "struct termio", trying to juggle definitions around to
make it compile could introduce regressions. So better to open code it.

Reported-by: Tulio Magno 
Suggested-by: Nicholas Piggin 
Tested-by: Justin M. Forbes 
Reviewed-by: Michael Ellerman 
Closes: https://lore.kernel.org/linuxppc-dev/8734dji5wl.fsf@ascii.art.br/
Signed-off-by: Madhavan Srinivasan 
Link: https://patch.msgid.link/20250517142237.156665-1-maddy@linux.ibm.com

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

powerpc/eeh: Fix missing PE bridge reconfiguration during VFIO EEH recovery

2025-06-13T07:00:48+00:00

VFIO EEH recovery for PCI passthrough devices fails on PowerNV and pseries
platforms due to missing host-side PE bridge reconfiguration. In the
current implementation, eeh_pe_configure() only performs RTAS or OPAL-based
bridge reconfiguration for native host devices, but skips it entirely for
PEs managed through VFIO in guest passthrough scenarios.

This leads to incomplete EEH recovery when a PCI error affects a
passthrough device assigned to a QEMU/KVM guest. Although VFIO triggers the
EEH recovery flow through VFIO_EEH_PE_ENABLE ioctl, the platform-specific
bridge reconfiguration step is silently bypassed. As a result, the PE's
config space is not fully restored, causing subsequent config space access
failures or EEH freeze-on-access errors inside the guest.

This patch fixes the issue by ensuring that eeh_pe_configure() always
invokes the platform's configure_bridge() callback (e.g.,
pseries_eeh_phb_configure_bridge) even for VFIO-managed PEs. This ensures
that RTAS or OPAL calls to reconfigure the PE bridge are correctly issued
on the host side, restoring the PE's configuration space after an EEH
event.

This fix is essential for reliable EEH recovery in QEMU/KVM guests using
VFIO PCI passthrough on PowerNV and pseries systems.

Tested with:
- QEMU/KVM guest using VFIO passthrough (IBM Power9,(lpar)Power11 host)
- Injected EEH errors with pseries EEH errinjct tool on host, recovery
  verified on qemu guest.
- Verified successful config space access and CAP_EXP DevCtl restoration
  after recovery

Fixes: 212d16cdca2d ("powerpc/eeh: EEH support for VFIO PCI device")
Signed-off-by: Narayana Murty N 
Reviewed-by: Vaibhav Jain 
Reviewed-by: Ganesh Goudar 
Signed-off-by: Madhavan Srinivasan 
Link: https://patch.msgid.link/20250508062928.146043-1-nnmlinux@linux.ibm.com

powerpc/vdso: Fix build of VDSO32 with pcrel

2025-06-13T07:00:15+00:00

Building vdso32 on power10 with pcrel leads to following errors:

	  VDSO32A arch/powerpc/kernel/vdso/gettimeofday-32.o
	arch/powerpc/kernel/vdso/gettimeofday.S: Assembler messages:
	arch/powerpc/kernel/vdso/gettimeofday.S:40: Error: syntax error; found `@', expected `,'
	arch/powerpc/kernel/vdso/gettimeofday.S:71:  Info: macro invoked from here
	arch/powerpc/kernel/vdso/gettimeofday.S:40: Error: junk at end of line: `@notoc'
	arch/powerpc/kernel/vdso/gettimeofday.S:71:  Info: macro invoked from here
	 ...
	make[2]: *** [arch/powerpc/kernel/vdso/Makefile:85: arch/powerpc/kernel/vdso/gettimeofday-32.o] Error 1
	make[1]: *** [arch/powerpc/Makefile:388: vdso_prepare] Error 2

Once the above is fixed, the following happens:

	  VDSO32C arch/powerpc/kernel/vdso/vgettimeofday-32.o
	cc1: error: '-mpcrel' requires '-mcmodel=medium'
	make[2]: *** [arch/powerpc/kernel/vdso/Makefile:89: arch/powerpc/kernel/vdso/vgettimeofday-32.o] Error 1
	make[1]: *** [arch/powerpc/Makefile:388: vdso_prepare] Error 2
	make: *** [Makefile:251: __sub-make] Error 2

Make sure pcrel version of CFUNC() macro is used only for powerpc64
builds and remove -mpcrel for powerpc32 builds.

Fixes: 7e3a68be42e1 ("powerpc/64: vmlinux support building with PCREL addresing")
Signed-off-by: Christophe Leroy 
Signed-off-by: Madhavan Srinivasan 
Link: https://patch.msgid.link/1fa3453f07d42a50a70114da9905bf7b73304fca.1747073669.git.christophe.leroy@csgroup.eu

mm: pgtable: fix pte_swp_exclusive

2025-06-11T21:52:08+00:00

Make pte_swp_exclusive return bool instead of int.  This will better
reflect how pte_swp_exclusive is actually used in the code.

This fixes swap/swapoff problems on Alpha due pte_swp_exclusive not
returning correct values when _PAGE_SWP_EXCLUSIVE bit resides in upper
32-bits of PTE (like on alpha).

Suggested-by: Al Viro 
Signed-off-by: Magnus Lindholm 
Cc: Sam James 
Link: https://lore.kernel.org/lkml/20250218175735.19882-2-linmag7@gmail.com/
Link: https://lore.kernel.org/lkml/20250602041118.GA2675383@ZenIV/
[ Applied as the 'sed' script Al suggested   - Linus ]
Signed-off-by: Linus Torvalds

powerpc/vas: Return -EINVAL if the offset is non-zero in mmap()

2025-06-10T02:26:41+00:00

The user space calls mmap() to map VAS window paste address
and the kernel returns the complete mapped page for each
window. So return -EINVAL if non-zero is passed for offset
parameter to mmap().

See Documentation/arch/powerpc/vas-api.rst for mmap()
restrictions.

Co-developed-by: Jonathan Greental 
Signed-off-by: Jonathan Greental 
Reported-by: Jonathan Greental 
Fixes: dda44eb29c23 ("powerpc/vas: Add VAS user space API")
Signed-off-by: Haren Myneni 
Signed-off-by: Madhavan Srinivasan 
Link: https://patch.msgid.link/20250610021227.361980-2-maddy@linux.ibm.com

powerpc/powernv/memtrace: Fix out of bounds issue in memtrace mmap

2025-06-10T02:14:27+00:00

memtrace mmap issue has an out of bounds issue. This patch fixes the by
checking that the requested mapping region size should stay within the
allocated region size.

Reported-by: Jonathan Greental 
Fixes: 08a022ad3dfa ("powerpc/powernv/memtrace: Allow mmaping trace buffers")
Signed-off-by: Ritesh Harjani (IBM) 
Signed-off-by: Madhavan Srinivasan 
Link: https://patch.msgid.link/20250610021227.361980-1-maddy@linux.ibm.com

treewide, timers: Rename from_timer() to timer_container_of()

2025-06-08T07:07:37+00:00

Move this API to the canonical timer_*() namespace.

[ tglx: Redone against pre rc1 ]

Signed-off-by: Ingo Molnar 
Signed-off-by: Thomas Gleixner 
Link: https://lore.kernel.org/all/aB2X0jCKQO56WdMt@gmail.com