kernel/arch/powerpc/kexec/core_64.c, branch linux-6.2.y

powerpc: Remove CONFIG_PPC_BOOK3E

2022-09-26T13:00:13Z

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 Signed-off-by: Michael Ellerman Link: https://lore.kernel.org/r/5d0891490813c19cdcfc04678f512ea68cba3e64.1663606876.git.christophe.leroy@csgroup.eu

powerpc: Add missing headers

2022-05-08T12:15:40Z

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 Signed-off-by: Michael Ellerman Link: https://lore.kernel.org/r/be8bdc934d152a7d8ee8d1a840d5596e2f7d85e0.1646767214.git.christophe.leroy@csgroup.eu

powerpc: fix typos in comments

2022-05-05T12:12:44Z

Various spelling mistakes in comments. Detected with the help of Coccinelle. Signed-off-by: Julia Lawall Reviewed-by: Joel Stanley Signed-off-by: Michael Ellerman Link: https://lore.kernel.org/r/20220430185654.5855-1-Julia.Lawall@inria.fr

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

2022-03-08T11:06:25Z

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

powerpc/kexec: Declare kexec_paca static

2022-03-07T13:05:01Z

kexec_paca is exclusively used in kexec/core_64.c Declare it static. Signed-off-by: Christophe Leroy Signed-off-by: Michael Ellerman 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_MMU

2021-12-09T11:41:13Z

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 [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 Link: https://lore.kernel.org/r/20211201144153.2456614-18-npiggin@gmail.com

powerpc/machdep: Remove stale functions from ppc_md structure

2021-10-22T04:22:05Z

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 Reviewed-by: Daniel Axtens [mpe: Drop prototype for default_machine_kexec_prepare() as noted by dja] Signed-off-by: Michael Ellerman Link: https://lore.kernel.org/r/24d4ca0ada683c9436a5f812a7aeb0a1362afa2b.1630398606.git.christophe.leroy@csgroup.eu

powerpc/kexec: fix for_each_child.cocci warning

2021-08-10T13:14:55Z

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 Signed-off-by: kernel test robot Signed-off-by: Michael Ellerman Link: https://lore.kernel.org/r/alpine.DEB.2.22.394.2108031654080.17639@hadrien

powerpc/kexec: blacklist functions called in real mode for kprobe

2021-07-26T10:38:51Z

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 Signed-off-by: Michael Ellerman Link: https://lore.kernel.org/r/162626687834.155313.4692863392927831843.stgit@hbathini-workstation.ibm.com

powerpc/book3s64/keys/kuap: Reset AMR/IAMR values on kexec

2020-07-20T12:57:59Z

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 Signed-off-by: Michael Ellerman Link: https://lore.kernel.org/r/20200709032946.881753-19-aneesh.kumar@linux.ibm.com