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* Merge tag 'powerpc-6.11-1' of ↵Linus Torvalds2024-07-201-16/+37
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux Pull powerpc updates from Michael Ellerman: - Remove support for 40x CPUs & platforms - Add support to the 64-bit BPF JIT for cpu v4 instructions - Fix PCI hotplug driver crash on powernv - Fix doorbell emulation for KVM on PAPR guests (nestedv2) - Fix KVM nested guest handling of some less used SPRs - Online NUMA nodes with no CPU/memory if they have a PCI device attached - Reduce memory overhead of enabling kfence on 64-bit Radix MMU kernels - Reimplement the iommu table_group_ops for pseries for VFIO SPAPR TCE Thanks to: Anjali K, Artem Savkov, Athira Rajeev, Breno Leitao, Brian King, Celeste Liu, Christophe Leroy, Esben Haabendal, Gaurav Batra, Gautam Menghani, Haren Myneni, Hari Bathini, Jeff Johnson, Krishna Kumar, Krzysztof Kozlowski, Nathan Lynch, Nicholas Piggin, Nick Bowler, Nilay Shroff, Rob Herring (Arm), Shawn Anastasio, Shivaprasad G Bhat, Sourabh Jain, Srikar Dronamraju, Timothy Pearson, Uwe Kleine-König, and Vaibhav Jain. * tag 'powerpc-6.11-1' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux: (57 commits) Documentation/powerpc: Mention 40x is removed powerpc: Remove 40x leftovers macintosh/therm_windtunnel: fix module unload. powerpc: Check only single values are passed to CPU/MMU feature checks powerpc/xmon: Fix disassembly CPU feature checks powerpc: Drop clang workaround for builtin constant checks powerpc64/bpf: jit support for signed division and modulo powerpc64/bpf: jit support for sign extended mov powerpc64/bpf: jit support for sign extended load powerpc64/bpf: jit support for unconditional byte swap powerpc64/bpf: jit support for 32bit offset jmp instruction powerpc/pci: Hotplug driver bridge support pci/hotplug/pnv_php: Fix hotplug driver crash on Powernv powerpc/configs: Update defconfig with now user-visible CONFIG_FSL_IFC powerpc: add missing MODULE_DESCRIPTION() macros macintosh/mac_hid: add MODULE_DESCRIPTION() KVM: PPC: add missing MODULE_DESCRIPTION() macros powerpc/kexec: Use of_property_read_reg() powerpc/64s/radix/kfence: map __kfence_pool at page granularity powerpc/pseries/iommu: Define spapr_tce_table_group_ops only with CONFIG_IOMMU_API ...
| * powerpc/kexec_file: fix cpus node update to FDTSourabh Jain2024-06-171-16/+37
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | While updating the cpus node, commit 40c753993e3a ("powerpc/kexec_file: Use current CPU info while setting up FDT") first deletes all subnodes under the /cpus node. However, while adding sub-nodes back, it missed adding cpus subnodes whose device_type != "cpu", such as l2-cache*, l3-cache*, ibm,powerpc-cpu-features. Fix this by only deleting cpus sub-nodes of device_type == "cpus" and then adding all available nodes with device_type == "cpu". Fixes: 40c753993e3a ("powerpc/kexec_file: Use current CPU info while setting up FDT") Signed-off-by: Sourabh Jain <sourabhjain@linux.ibm.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://msgid.link/20240510102235.2269496-3-sourabhjain@linux.ibm.com
* | powerpc/pseries: Fix scv instruction crash with kexecNicholas Piggin2024-06-281-0/+11
|/ | | | | | | | | | | | | | | | | | | | | | | | | kexec on pseries disables AIL (reloc_on_exc), required for scv instruction support, before other CPUs have been shut down. This means they can execute scv instructions after AIL is disabled, which causes an interrupt at an unexpected entry location that crashes the kernel. Change the kexec sequence to disable AIL after other CPUs have been brought down. As a refresher, the real-mode scv interrupt vector is 0x17000, and the fixed-location head code probably couldn't easily deal with implementing such high addresses so it was just decided not to support that interrupt at all. Fixes: 7fa95f9adaee ("powerpc/64s: system call support for scv/rfscv instructions") Cc: stable@vger.kernel.org # v5.9+ Reported-by: Sourabh Jain <sourabhjain@linux.ibm.com> Closes: https://lore.kernel.org/3b4b2943-49ad-4619-b195-bc416f1d1409@linux.ibm.com Signed-off-by: Nicholas Piggin <npiggin@gmail.com> Tested-by: Gautam Menghani <gautam@linux.ibm.com> Tested-by: Sourabh Jain <sourabhjain@linux.ibm.com> Link: https://msgid.link/20240625134047.298759-1-npiggin@gmail.com Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
* powerpc/kexec: make the update_cpus_node() function publicSourabh Jain2024-04-231-0/+91
| | | | | | | | | | | | | | | | Move the update_cpus_node() from kexec/{file_load_64.c => core_64.c} to allow other kexec components to use it. Later in the series, this function is used for in-kernel updates to the kdump image during CPU/memory hotplug or online/offline events for both kexec_load and kexec_file_load syscalls. No functional changes are intended. Signed-off-by: Sourabh Jain <sourabhjain@linux.ibm.com> Acked-by: Hari Bathini <hbathini@linux.ibm.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://msgid.link/20240326055413.186534-5-sourabhjain@linux.ibm.com
* arch: remove ARCH_TASK_STRUCT_ON_STACKHeiko Carstens2023-12-111-2/+1
| | | | | | | | | | | | | | | | | | | | IA-64 was the only architecture which selected ARCH_TASK_STRUCT_ON_STACK. IA-64 was removed with commit cf8e8658100d ("arch: Remove Itanium (IA-64) architecture"). Therefore remove support for ARCH_TASK_STRUCT_ON_STACK as well. Note: this also reveals a potential bug in powerpc code, which makes use of __init_task_data without selecting ARCH_TASK_STRUCT_ON_STACK which makes __init_task_data a no-op. This is broken since commit d11ed3ab3166 ("Expand INIT_TASK() in init/init_task.c and remove") from 2018 and needs to be addressed separately. Link: https://lkml.kernel.org/r/20231116133638.1636277-4-hca@linux.ibm.com Signed-off-by: Heiko Carstens <hca@linux.ibm.com> Reviewed-by: Arnd Bergmann <arnd@arndb.de> Cc: Michael Ellerman <mpe@ellerman.id.au> Cc: Nicholas Piggin <npiggin@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
* powerpc: Annotate endianness of various variables and functionsBenjamin Gray2023-10-191-2/+2
| | | | | | | | | | | | | | | Sparse reports several endianness warnings on variables and functions that are consistently treated as big endian. There are no multi-endianness shenanigans going on here so fix these low hanging fruit up in one patch. All changes are just type annotations; no endianness switching operations are introduced by this patch. Signed-off-by: Benjamin Gray <bgray@linux.ibm.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://msgid.link/20231011053711.93427-7-bgray@linux.ibm.com
* powerpc: Remove CONFIG_PPC_BOOK3EChristophe Leroy2022-09-261-1/+1
| | | | | | | | | | | | | CONFIG_PPC_BOOK3E is redundant with CONFIG_PPC_BOOK3E_64. The later is more explicit about the fact that it's a 64 bits target. Remove CONFIG_PPC_BOOK3E. Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://lore.kernel.org/r/5d0891490813c19cdcfc04678f512ea68cba3e64.1663606876.git.christophe.leroy@csgroup.eu
* powerpc: Add missing headersChristophe Leroy2022-05-081-1/+1
| | | | | | | | | | | | | Don't inherit headers "by chances" from asm/prom.h, asm/mpc52xx.h, asm/pci.h etc... Include the needed headers, and remove asm/prom.h when it was needed exclusively for pulling necessary headers. Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://lore.kernel.org/r/be8bdc934d152a7d8ee8d1a840d5596e2f7d85e0.1646767214.git.christophe.leroy@csgroup.eu
* powerpc: fix typos in commentsJulia Lawall2022-05-051-1/+1
| | | | | | | | | | | Various spelling mistakes in comments. Detected with the help of Coccinelle. Signed-off-by: Julia Lawall <Julia.Lawall@inria.fr> Reviewed-by: Joel Stanley <joel@jms.id.au> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://lore.kernel.org/r/20220430185654.5855-1-Julia.Lawall@inria.fr
* powerpc: Move C prototypes out of asm-prototypes.hChristophe Leroy2022-03-081-1/+0
| | | | | | | | | | | | | | | | | | | | | | | | | | | | 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 <christophe.leroy@csgroup.eu> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://lore.kernel.org/r/62d46904eca74042097acf4cb12c175e3067f3d1.1646413435.git.christophe.leroy@csgroup.eu
* powerpc/kexec: Declare kexec_paca staticChristophe Leroy2022-03-071-1/+1
| | | | | | | | | | | kexec_paca is exclusively used in kexec/core_64.c Declare it static. Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://lore.kernel.org/r/094983ee851644165b7700c73cac63cfe20596cd.1646413435.git.christophe.leroy@csgroup.eu
* powerpc/64s: Move hash MMU support code under CONFIG_PPC_64S_HASH_MMUNicholas Piggin2021-12-091-2/+2
| | | | | | | | | | | | | Compiling out hash support code when CONFIG_PPC_64S_HASH_MMU=n saves 128kB kernel image size (90kB text) on powernv_defconfig minus KVM, 350kB on pseries_defconfig minus KVM, 40kB on a tiny config. Signed-off-by: Nicholas Piggin <npiggin@gmail.com> [mpe: Fixup defined(ARCH_HAS_MEMREMAP_COMPAT_ALIGN), which needs CONFIG. Fix radix_enabled() use in setup_initial_memory_limit(). Add some stubs to reduce number of ifdefs.] Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://lore.kernel.org/r/20211201144153.2456614-18-npiggin@gmail.com
* powerpc/machdep: Remove stale functions from ppc_md structureChristophe Leroy2021-10-221-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | ppc_md.iommu_save() is not set anymore by any platform after commit c40785ad305b ("powerpc/dart: Use a cachable DART"). So iommu_save() has become a nop and can be removed. ppc_md.show_percpuinfo() is not set anymore by any platform after commit 4350147a816b ("[PATCH] ppc64: SMU based macs cpufreq support"). Last users of ppc_md.rtc_read_val() and ppc_md.rtc_write_val() were removed by commit 0f03a43b8f0f ("[POWERPC] Remove todc code from ARCH=powerpc") Last user of kgdb_map_scc() was removed by commit 17ce452f7ea3 ("kgdb, powerpc: arch specific powerpc kgdb support"). ppc.machine_kexec_prepare() has not been used since commit 8ee3e0d69623 ("powerpc: Remove the main legacy iSerie platform code"). This allows the removal of machine_kexec_prepare() and the rename of default_machine_kexec_prepare() into machine_kexec_prepare() Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu> Reviewed-by: Daniel Axtens <dja@axtens.net> [mpe: Drop prototype for default_machine_kexec_prepare() as noted by dja] Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://lore.kernel.org/r/24d4ca0ada683c9436a5f812a7aeb0a1362afa2b.1630398606.git.christophe.leroy@csgroup.eu
* powerpc/kexec: fix for_each_child.cocci warningkernel test robot2021-08-101-1/+3
| | | | | | | | | | | | for_each_node_by_type should have of_node_put() before return. Generated by: scripts/coccinelle/iterators/for_each_child.cocci Reported-by: kernel test robot <lkp@intel.com> Signed-off-by: kernel test robot <lkp@intel.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://lore.kernel.org/r/alpine.DEB.2.22.394.2108031654080.17639@hadrien
* powerpc/kexec: blacklist functions called in real mode for kprobeHari Bathini2021-07-261-2/+4
| | | | | | | | | | | As kprobe does not handle events happening in real mode, blacklist the functions that only get called in real mode or in kexec sequence with MMU turned off. Signed-off-by: Hari Bathini <hbathini@linux.ibm.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://lore.kernel.org/r/162626687834.155313.4692863392927831843.stgit@hbathini-workstation.ibm.com
* powerpc/book3s64/keys/kuap: Reset AMR/IAMR values on kexecAneesh Kumar K.V2020-07-201-0/+2
| | | | | | | | | | | | | | | As we kexec across kernels that use AMR/IAMR for different purposes we need to ensure that new kernels get kexec'd with a reset value of AMR/IAMR. For ex: the new kernel can use key 0 for kernel mapping and the old AMR value prevents access to key 0. This patch also removes reset if IAMR and AMOR in kexec_sequence. Reset of AMOR is not needed and the IAMR reset is partial (it doesn't do the reset on secondary cpus) and is redundant with this patch. Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.ibm.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://lore.kernel.org/r/20200709032946.881753-19-aneesh.kumar@linux.ibm.com
* powerpc: Replace cpu_up/down() with add/remove_cpu()Qais Yousef2020-03-251-1/+1
| | | | | | | | | | | | | | | | | | The core device API performs extra housekeeping bits that are missing from directly calling cpu_up/down. See commit a6717c01ddc2 ("powerpc/rtas: use device model APIs and serialization during LPM") for an example description of what might go wrong. This also prepares to make cpu_up/down() a private interface of the CPU subsystem. Signed-off-by: Qais Yousef <qais.yousef@arm.com> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Acked-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://lkml.kernel.org/r/20200323135110.30522-11-qais.yousef@arm.com
* powerpc/kexec: Move kexec files into a dedicated subdir.Christophe Leroy2019-11-211-0/+417
arch/powerpc/kernel/ contains 8 files dedicated to kexec. Move them into a dedicated subdirectory. Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr> [mpe: Move to a/p/kexec, drop the 'machine' naming and use 'core' instead] Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://lore.kernel.org/r/afbef97ec6a978574a5cf91a4441000e0a9da42a.1572351221.git.christophe.leroy@c-s.fr
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