linux-dev/arch/powerpc/kernel/fadump.c, branch linus/master

Merge tag 'powerpc-5.19-1' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux

2022-05-28T18:27:17Z

Pull powerpc updates from Michael Ellerman: - Convert to the generic mmap support (ARCH_WANT_DEFAULT_TOPDOWN_MMAP_LAYOUT) - Add support for outline-only KASAN with 64-bit Radix MMU (P9 or later) - Increase SIGSTKSZ and MINSIGSTKSZ and add support for AT_MINSIGSTKSZ - Enable the DAWR (Data Address Watchpoint) on POWER9 DD2.3 or later - Drop support for system call instruction emulation - Many other small features and fixes Thanks to Alexey Kardashevskiy, Alistair Popple, Andy Shevchenko, Bagas Sanjaya, Bjorn Helgaas, Bo Liu, Chen Huang, Christophe Leroy, Colin Ian King, Daniel Axtens, Dwaipayan Ray, Fabiano Rosas, Finn Thain, Frank Rowand, Fuqian Huang, Guilherme G. Piccoli, Hangyu Hua, Haowen Bai, Haren Myneni, Hari Bathini, He Ying, Jason Wang, Jiapeng Chong, Jing Yangyang, Joel Stanley, Julia Lawall, Kajol Jain, Kevin Hao, Krzysztof Kozlowski, Laurent Dufour, Lv Ruyi, Madhavan Srinivasan, Magali Lemes, Miaoqian Lin, Minghao Chi, Nathan Chancellor, Naveen N. Rao, Nicholas Piggin, Oliver O'Halloran, Oscar Salvador, Pali Rohár, Paul Mackerras, Peng Wu, Qing Wang, Randy Dunlap, Reza Arbab, Russell Currey, Sohaib Mohamed, Vaibhav Jain, Vasant Hegde, Wang Qing, Wang Wensheng, Xiang wangx, Xiaomeng Tong, Xu Wang, Yang Guang, Yang Li, Ye Bin, YueHaibing, Yu Kuai, Zheng Bin, Zou Wei, and Zucheng Zheng. * tag 'powerpc-5.19-1' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux: (200 commits) powerpc/64: Include cache.h directly in paca.h powerpc/64s: Only set HAVE_ARCH_UNMAPPED_AREA when CONFIG_PPC_64S_HASH_MMU is set powerpc/xics: Include missing header powerpc/powernv/pci: Drop VF MPS fixup powerpc/fsl_book3e: Don't set rodata RO too early powerpc/microwatt: Add mmu bits to device tree powerpc/powernv/flash: Check OPAL flash calls exist before using powerpc/powermac: constify device_node in of_irq_parse_oldworld() powerpc/powermac: add missing g5_phy_disable_cpu1() declaration selftests/powerpc/pmu: fix spelling mistake "mis-match" -> "mismatch" powerpc: Enable the DAWR on POWER9 DD2.3 and above powerpc/64s: Add CPU_FTRS_POWER10 to ALWAYS mask powerpc/64s: Add CPU_FTRS_POWER9_DD2_2 to CPU_FTRS_ALWAYS mask powerpc: Fix all occurences of "the the" selftests/powerpc/pmu/ebb: remove fixed_instruction.S powerpc/platforms/83xx: Use of_device_get_match_data() powerpc/eeh: Drop redundant spinlock initialization powerpc/iommu: Add missing of_node_put in iommu_init_early_dart powerpc/pseries/vas: Call misc_deregister if sysfs init fails powerpc/papr_scm: Fix leaking nvdimm_events_map elements ...

powerpc: Finalise cleanup around ABI use

2022-05-19T13:11:29Z

Now that we have CONFIG_PPC64_ELF_ABI_V1 and CONFIG_PPC64_ELF_ABI_V2, get rid of all indirect detection of ABI version. Signed-off-by: Christophe Leroy Signed-off-by: Michael Ellerman Link: https://lore.kernel.org/r/709d9d69523c14c8a9fba4486395dca0f2d675b1.1652074503.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/fadump: Use swap() instead of open coding it

2022-05-04T09:37:45Z

Clean the following coccicheck warning: ./arch/powerpc/kernel/fadump.c:1291:34-35: WARNING opportunity for swap(). Reported-by: Abaci Robot Signed-off-by: Jiapeng Chong Signed-off-by: Christophe Leroy Signed-off-by: Michael Ellerman Link: https://lore.kernel.org/r/20220129034847.76902-1-jiapeng.chong@linux.alibaba.com

powerpc/fadump: Correct two typos in a comment

2022-05-04T09:37:45Z

Fix typos of 'remaining' and 'those'. Signed-off-by: Randy Dunlap Suggested-by: Matthew Wilcox # 'remaining' Signed-off-by: Christophe Leroy Signed-off-by: Michael Ellerman Link: https://lore.kernel.org/r/20211030002619.2063-1-rdunlap@infradead.org

powerpc/fadump: align destination address to pagesize

2022-04-26T12:38:13Z

On crash, boot memory area is copied to a destination address by f/w. This region is setup as separate PT_LOAD segment with appropriate offset to handle the different physical address and offset in vmcore. If this destination address is not page aligned, reading the vmcore with mmap is likely to fail forcing tools like makedumpfile to fall back to regular read. Avoid mmap read failure by ensuring that the destination address is always page aligned. Signed-off-by: Hari Bathini Signed-off-by: Michael Ellerman Link: https://lore.kernel.org/r/20220406093839.206608-3-hbathini@linux.ibm.com

powerpc/fadump: fix PT_LOAD segment for boot memory area

2022-04-26T12:38:13Z

Boot memory area is setup as separate PT_LOAD segment in the vmcore as it is moved by f/w, on crash, to a destination address provided by the kernel. Having separate PT_LOAD segment helps in handling the different physical address and offset for boot memory area in the vmcore. Commit ced1bf52f477 ("powerpc/fadump: merge adjacent memory ranges to reduce PT_LOAD segements") inadvertly broke this pre-condition for cases where some of the first kernel memory is available adjacent to boot memory area. This scenario is rare but possible when memory for fadump could not be reserved adjacent to boot memory area owing to memory hole or such. Reading memory from a vmcore exported in such scenario provides incorrect data. Fix it by ensuring no other region is folded into boot memory area. Fixes: ced1bf52f477 ("powerpc/fadump: merge adjacent memory ranges to reduce PT_LOAD segements") Signed-off-by: Hari Bathini Signed-off-by: Michael Ellerman Link: https://lore.kernel.org/r/20220406093839.206608-2-hbathini@linux.ibm.com

powerpc/fadump: save CPU reg data in vmcore when PHYP terminates LPAR

2022-04-26T12:36:57Z

An LPAR can be terminated by the POWER Hypervisor (PHYP) for various reasons. If FADump was configured when PHYP terminates the LPAR, platform-assisted dump is initiated to save the kernel dump. But CPU register data would not be processed/saved in the vmcore in such case because CPU mask is set in crash_fadump() at the time of kernel crash and it remains unset in this case with LPAR being terminated by PHYP abruptly. To get around the problem, initialize cpu_mask to cpu_possible_mask so as to ensure all possible CPUs' register data is processed for the vmcore generated on PHYP terminated LPAR. Also, rename the crash info member variable from online_mask to cpu_mask as it doesn't necessarily have to be online CPU mask always. Signed-off-by: Hari Bathini Reviewed-by: Mahesh Salgaonkar Signed-off-by: Michael Ellerman Link: https://lore.kernel.org/r/20220404182137.59231-1-hbathini@linux.ibm.com

ELF: Remove elf_core_copy_kernel_regs()

2022-04-14T12:08:26Z

x86-32 was the last architecture that implemented separate user and kernel registers. Signed-off-by: Brian Gerst Signed-off-by: Borislav Petkov Reviewed-by: Thomas Gleixner Acked-by: Andy Lutomirski Acked-by: Michael Ellerman Link: https://lore.kernel.org/r/20220325153953.162643-3-brgerst@gmail.com