kernel/linux.git/arch/powerpc/include/asm/setup.h, branch v6.12.80

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: Add hardware description string

2022-09-30T08:35:52+00:00

Create a hardware description string, which we will use to record various details of the hardware platform we are running on. Print the accumulated description at boot, and use it to set the generic description which is printed in oopses. To begin with add ppc_md.name, aka the "machine description". Example output at boot with the full series applied: Linux version 6.0.0-rc2-gcc-11.1.0-00199-g893f9007a5ce-dirty (michael@alpine1-p1) (powerpc64-linux-gcc (GCC) 11.1.0, GNU ld (GNU Binutils) 2.36.1) #844 SMP Thu Sep 29 22:29:53 AEST 2022 Hardware name: IBM pSeries (emulated by qemu) POWER9 (raw) 0x4e1200 0xf000005 of:SLOF,git-5b4c5a pSeries printk: bootconsole [udbg0] enabled Signed-off-by: Michael Ellerman Link: https://lore.kernel.org/r/20220930082709.55830-1-mpe@ellerman.id.au

powerpc: Remove CONFIG_PPC_FSL_BOOK3E

2022-09-26T13:00:13+00:00

CONFIG_PPC_FSL_BOOK3E is redundant with CONFIG_PPC_E500. Remove it. And rename five files accordingly. Signed-off-by: Christophe Leroy [mpe: Rename include guards to match new file names] Signed-off-by: Michael Ellerman Link: https://lore.kernel.org/r/795cb93b88c9a0279289712e674f39e3b108a1b4.1663606876.git.christophe.leroy@csgroup.eu

powerpc: Remove stale declarations in mmu_decl.h

2022-08-26T01:02:20+00:00

rtas_size and rtas_data are not used anymore since at least commit 7c8c6b9776fb ("powerpc: Merge lmb.c and make MM initialization use it.") Remove them. Since commit 4b74a35fc7e9 ("powerpc/32s: Make Hash var static") the forward declaration of struct hash_pte is unneeded. Remove it. __initial_memory_limit_addr was removed by commit e63075a3c937 ("memblock: Introduce default allocation limit and use it to replace explicit ones") Remove the declaration. Signed-off-by: Christophe Leroy Signed-off-by: Michael Ellerman Link: https://lore.kernel.org/r/a821e8397dd56b8177ecc04966d3b3a7c4bda6d4.1660919016.git.christophe.leroy@csgroup.eu

powerpc/powermac: Remove empty function note_scsi_host()

2022-06-26T00:29:44+00:00

note_scsi_host() has been an empty function since commit 6ee0d9f744d4 ("[POWERPC] Remove unused old code from powermac setup code"). Remove it. Reported-by: kernel test robot Signed-off-by: Christophe Leroy Signed-off-by: Michael Ellerman Link: https://lore.kernel.org/r/26f8b72a4276c0bd8ed63860c7316f6361c351b4.1655978907.git.christophe.leroy@csgroup.eu

powerpc: Move prom_init() out of asm-prototypes.h

2022-06-20T01:29:49+00:00

This is the end of the work started with commit 76222808fc25 ("powerpc: Move C prototypes out of asm-prototypes.h") Now that asm/machdep.h doesn't include asm/setup.h anymore, there are no conflicts anymore with the function prom_init() defined in drivers/gpu/drm/nouveau/nvkm/subdev/bios/shadowrom.o So we can move it to asm/setup.h Signed-off-by: Christophe Leroy Signed-off-by: Michael Ellerman Link: https://lore.kernel.org/r/e111e4f0addb0fa810d5f6a71d3b8e62c0b53492.1654966508.git.christophe.leroy@csgroup.eu

Merge branch 'topic/ppc-kvm' into next

2022-03-28T10:11:24+00:00

Merge some more commits from our KVM topic branch. In particular this brings in some commits that depend on a new capability that was merged via the KVM tree for v5.18.

powerpc: Move C prototypes out of asm-prototypes.h

2022-03-08T11:06:25+00:00

We originally added asm-prototypes.h in commit 42f5b4cacd78 ("powerpc: Introduce asm-prototypes.h"). It's purpose was for prototypes of C functions that are only called from asm, in order to fix sparse warnings about missing prototypes. A few months later Nick added a different use case in commit 4efca4ed05cb ("kbuild: modversions for EXPORT_SYMBOL() for asm") for C prototypes for exported asm functions. This is basically the inverse of our original usage. Since then we've added various prototypes to asm-prototypes.h for both reasons, meaning we now need to unstitch it all. Dispatch prototypes of C functions into relevant headers and keep only the prototypes for functions defined in assembly. For the time being, leave prom_init() there because moving it into asm/prom.h or asm/setup.h conflicts with drivers/gpu/drm/nouveau/nvkm/subdev/bios/shadowrom.o This will be fixed later by untaggling asm/pci.h and asm/prom.h or by renaming the function in shadowrom.c Signed-off-by: Christophe Leroy Signed-off-by: Michael Ellerman Link: https://lore.kernel.org/r/62d46904eca74042097acf4cb12c175e3067f3d1.1646413435.git.christophe.leroy@csgroup.eu

KVM: PPC: Use KVM_CAP_PPC_AIL_MODE_3

2022-03-08T02:14:01+00:00

Use KVM_CAP_PPC_AIL_MODE_3 to advertise the capability to set the AIL resource mode to 3 with the H_SET_MODE hypercall. This capability differs between processor types and KVM types (PR, HV, Nested HV), and affects guest-visible behaviour. QEMU will implement a cap-ail-mode-3 to control this behaviour[1], and use the KVM CAP if available to determine KVM support[2]. [1] https://lists.nongnu.org/archive/html/qemu-ppc/2022-02/msg00437.html [2] https://lists.nongnu.org/archive/html/qemu-ppc/2022-02/msg00439.html Signed-off-by: Nicholas Piggin Reviewed-by: Fabiano Rosas [mpe: Rebase onto 93b71801a827 from kvm-ppc-cap-210 branch, add EXPORT_SYMBOL] Signed-off-by: Michael Ellerman Link: https://lore.kernel.org/r/20220222064727.2314380-4-npiggin@gmail.com

powerpc/code-patching: Remove init_mem_is_free

2021-12-23T11:35:24+00:00

A new state has been added by commit d2635f2012a4 ("mm: create a new system state and fix core_kernel_text()"). That state tells when initmem is about to be released and is redundant with init_mem_is_free. Remove init_mem_is_free. Signed-off-by: Christophe Leroy Signed-off-by: Michael Ellerman Link: https://lore.kernel.org/r/ad8c3ccb39c8edaa89fd3eda1cc7218baea1cde5.1638446239.git.christophe.leroy@csgroup.eu