Clang has a bug that casues the pcrel code model not to be used when any of
-msoft-float, -mno-altivec, or -mno-vsx are set. Leaving these off causes
FP/vector instructions to be generated, causing crashes. So disable pcrel
for clang for now.

Fixes: 7e3a68be

 ("powerpc/64: vmlinux support building with PCREL addresing")
Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://msgid.link/20230426055848.402993-3-npiggin@gmail.com

Fix a conflict between commit 4e991e3c ("powerpc: add CFUNC
assembly label annotation") and commit b504b6aa ("powerpc:
differentiate kthread from user kernel thread start").

Fixes: 4e991e3c ("powerpc: add CFUNC assembly label annotation")
Fixes: b504b6aa

 ("powerpc: differentiate kthread from user kernel thread start")
Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://msgid.link/20230426055848.402993-2-npiggin@gmail.com

Some powernv machines use IGB for networking, so build the driver in to
enable net booting such machines.

Suggested-by: Nicholas Piggin <npiggin@gmail.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://msgid.link/20230420052149.1328094-1-mpe@ellerman.id.au

Unlikely that anyone is still regularly using JFS, drop it from the
defconfig.

Suggested-by: Nicholas Piggin <npiggin@gmail.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://msgid.link/20230420051609.1324201-2-mpe@ellerman.id.au

The ext4 code will mount ext2 filesystems, no need to build in both.

Suggested-by: Nicholas Piggin <npiggin@gmail.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://msgid.link/20230420051609.1324201-1-mpe@ellerman.id.au

Rather than trying to keep multiple configs up to date, make
pseries_defconfig an alias for ppc64le_guest_defconfig.

NOTE, pseries_defconfig was a big endian config, but this commit
switches it to little endian.

Almost all distros are ppc64le these days, so little endian is much more
likely to be what a user wants when they build for "pseries".

For an actual big endian guest, use ppc64_guest_defconfig.

Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://msgid.link/20230414132415.821564-32-mpe@ellerman.id.au

Rather than trying to keep multiple configs up to date, make
pseries_le_defconfig an alias for ppc64le_guest_defconfig.

ppc64le_guest_defconfig should work in all cases that
pseries_le_defconfig currently does, but if not we can update it.

Move pseries_le_defconfig down in the Makefile, so it appears after
ppc64le_guest_defconfig in the help output.

Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://msgid.link/20230414132415.821564-31-mpe@ellerman.id.au

Incorporate the generic kvm_guest.config into the powerpc guest configs,
ppc64[le]_guest_defconfig.

This brings in some useful options, in particular 9P support, and also
means future additions to the generic file will be automatically picked
up by the powerpc configs.

Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://msgid.link/20230414132415.821564-30-mpe@ellerman.id.au

These drivers are sometimes required to have functional networking in a
guest, so build them in when building ppc64[le]_guest_defconfig.

Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://msgid.link/20230414132415.821564-29-mpe@ellerman.id.au

Add device mapper options for test coverage and in case folks are
booting systems that require them.

Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://msgid.link/20230414132415.821564-28-mpe@ellerman.id.au

Like pseries & powernv_defconfig, enable PSTORE.

Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://msgid.link/20230414132415.821564-27-mpe@ellerman.id.au

Most other configs, and distros enable it.

Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://msgid.link/20230414132415.821564-26-mpe@ellerman.id.au

Copy powernv_defconfig and enable BLK_DEV_NVME.

Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://msgid.link/20230414132415.821564-25-mpe@ellerman.id.au

No reason to use this anymore.

Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://msgid.link/20230414132415.821564-24-mpe@ellerman.id.au

Modern distros use SHA512 for module signing.

Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://msgid.link/20230414132415.821564-23-mpe@ellerman.id.au

Distros enable it.

Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://msgid.link/20230414132415.821564-22-mpe@ellerman.id.au

Distros enable it.

Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://msgid.link/20230414132415.821564-21-mpe@ellerman.id.au

Fedora enables DEBUG_VM, which has led to occasions where a VM_BUG_ON()
is not caught by upstream testing, but rather is first found in Fedora,
which is not how it's meant to be.

PAGE_OWNER & PAGE_POISONING both need to be enabled on the kernel
command line, so should not add much overhead in normal operation.

Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://msgid.link/20230414132415.821564-20-mpe@ellerman.id.au

This is enabled in some of the other powerpc configs, and can be useful
for debugging, so enable it in ppc64[le]_defconfig.

Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://msgid.link/20230414132415.821564-19-mpe@ellerman.id.au

All built as modules, so the tests only happen when the modules are
loaded, not affecting normal boot time.

Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://msgid.link/20230414132415.821564-18-mpe@ellerman.id.au

Fedora, CentOS, RHEL & SUSE all enable it.

Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://msgid.link/20230414132415.821564-17-mpe@ellerman.id.au

Multiple distros enable these.

Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://msgid.link/20230414132415.821564-16-mpe@ellerman.id.au

Fedora & CentOS enable these.

Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://msgid.link/20230414132415.821564-15-mpe@ellerman.id.au

Most distros enable these. In particular Fedore uses zram in the default
install.

Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://msgid.link/20230414132415.821564-14-mpe@ellerman.id.au

Most distros enable this.

Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://msgid.link/20230414132415.821564-13-mpe@ellerman.id.au

Distros enable these options.

Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://msgid.link/20230414132415.821564-12-mpe@ellerman.id.au

At least Fedora & SUSE enable it.

VIRT_CPU_ACCOUNTING_GEN is selected so no longer needs to be in the
defconfig.

Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://msgid.link/20230414132415.821564-11-mpe@ellerman.id.au

These options are enabled by most distros.

Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://msgid.link/20230414132415.821564-10-mpe@ellerman.id.au

Essentially all distros enable it.

Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://msgid.link/20230414132415.821564-9-mpe@ellerman.id.au

Traditionally on powerpc servers PREEMPT_NONE was used, but these days
multiple distros are building with PREEMPT_VOLUNTARY - Ubuntu, Fedora &
CentOS all enable it.

So update the upstream config to reflect that, and get test coverage
before code hits the distros.

Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://msgid.link/20230414132415.821564-8-mpe@ellerman.id.au

Tell the generic BPF code that the JIT should be enabled by default,
rather than the interpreter. Most distros use CONFIG_BPF_JIT_ALWAYS_ON=y
anyway, so this just updates upstream to more closely match that.

Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://msgid.link/20230414132415.821564-7-mpe@ellerman.id.au

Add the numerous options required to get secure boot enabled.

Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://msgid.link/20230414132415.821564-6-mpe@ellerman.id.au

This is a powerpc specific driver so add the symbols required to enable
it so it gets some build/boot test coverage.

Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://msgid.link/20230414132415.821564-5-mpe@ellerman.id.au

These algorithms were marked obsolete in commit 1674aea5

 ("crypto:
Kconfig - mark unused ciphers as obsolete").

Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://msgid.link/20230414132415.821564-4-mpe@ellerman.id.au

Since commit de551f2e

 ("net: Build IPv6 into kernel by default"),
IPV6 is default y.

Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://msgid.link/20230414132415.821564-3-mpe@ellerman.id.au

SPLPAR is default y since commit 20c0e826

 ("powerpc/pseries:
Implement paravirt qspinlocks for SPLPAR"), so doesn't need to be in the
defconfig.

Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://msgid.link/20230414132415.821564-2-mpe@ellerman.id.au

Update ppc64_defconfig to account for symbols moving around, no actual
changes.

Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://msgid.link/20230414132415.821564-1-mpe@ellerman.id.au

Currently none of the generated defconfigs appear in the help output,
because the help text discovers defconfigs by looking for actual files
named "*_defconfig".

Collect the generated defconfig names into a variable and then print
those out in archhelp.

Output looks like eg:

  pseries_le_defconfig        - Build for pseries_le
  ppc64le_defconfig           - Build for ppc64le
  ppc64le_guest_defconfig     - Build for ppc64le_guest
  ...
  ppc64_randconfig            - Build for ppc64_randconfig

  adder875_defconfig          - Build for adder875
  amigaone_defconfig          - Build for amigaone

Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
[mpe: Fix PHONY bug which broke in-tree build, thanks rmclure]
Link: https://msgid.link/20230329072334.2023357-2-mpe@ellerman.id.au

It's not necessary to prefix every command in archhelp with "@" (to
suppress echoing the command), because that is done by the top level
Makefile when it evaluates archhelp.

Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://msgid.link/20230329072334.2023357-1-mpe@ellerman.id.au

Code in the idle path is not allowed to be instrumented because RCU is
disabled, see commit 0e985e9d

 ("cpuidle: Add comments about
noinstr/__cpuidle usage").

Force inlining of the inline functions called from cpuidle, to ensure
they are not emitted out-of-line and then available for tracing.

Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://msgid.link/20230406144535.3786008-4-mpe@ellerman.id.au