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2024-01-17Merge tag 'mips_6.8' of git://git.kernel.org/pub/scm/linux/kernel/git/mips/linuxLinus Torvalds
Pull MIPS updates from Thomas Bogendoerfer: "Just cleanups and fixes" * tag 'mips_6.8' of git://git.kernel.org/pub/scm/linux/kernel/git/mips/linux: MIPS: Alchemy: Fix an out-of-bound access in db1550_dev_setup() MIPS: Alchemy: Fix an out-of-bound access in db1200_dev_setup() MIPS: Fix typos MIPS: Remove unused shadow GPR support from vector irq setup MIPS: Allow vectored interrupt handler to reside everywhere for 64bit mips: Set dump-stack arch description mips: mm: add slab availability checking in ioremap_prot mips: Optimize max_mapnr init procedure mips: Fix max_mapnr being uninitialized on early stages mips: Fix incorrect max_low_pfn adjustment mips: dmi: Fix early remap on MIPS32 MIPS: compressed: Use correct instruction for 64 bit code MIPS: SGI-IP27: hubio: fix nasid kernel-doc warning MAINTAINERS: Add myself as maintainer of the Ralink architecture
2024-01-08MIPS: Fix typosBjorn Helgaas
Fix typos, most reported by "codespell arch/mips". Only touches comments, no code changes. Signed-off-by: Bjorn Helgaas <bhelgaas@google.com> Cc: linux-mips@vger.kernel.org Reviewed-by: Randy Dunlap <rdunlap@infradead.org> Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
2023-12-12mips, kexec: fix the incorrect ifdeffery and dependency of CONFIG_KEXECBaoquan He
The select of KEXEC for CRASH_DUMP in kernel/Kconfig.kexec will be dropped, then compiling errors will be triggered if below config items are set: === CONFIG_CRASH_CORE=y CONFIG_KEXEC_CORE=y CONFIG_CRASH_DUMP=y === -------------------------------------------------------------------- mipsel-linux-ld: kernel/kexec_core.o: in function `kimage_free': kernel/kexec_core.c:(.text+0x2200): undefined reference to `machine_kexec_cleanup' mipsel-linux-ld: kernel/kexec_core.o: in function `__crash_kexec': kernel/kexec_core.c:(.text+0x2480): undefined reference to `machine_crash_shutdown' mipsel-linux-ld: kernel/kexec_core.c:(.text+0x2488): undefined reference to `machine_kexec' mipsel-linux-ld: kernel/kexec_core.o: in function `kernel_kexec': kernel/kexec_core.c:(.text+0x29b8): undefined reference to `machine_shutdown' mipsel-linux-ld: kernel/kexec_core.c:(.text+0x29c0): undefined reference to `machine_kexec' -------------------------------------------------------------------- Here, change the dependency of building kexec_core related object files, and the ifdeffery in mips from CONFIG_KEXEC to CONFIG_KEXEC_CORE. Link: https://lkml.kernel.org/r/20231208073036.7884-4-bhe@redhat.com Signed-off-by: Baoquan He <bhe@redhat.com> Reported-by: kernel test robot <lkp@intel.com> Closes: https://lore.kernel.org/oe-kbuild-all/202311302042.sn8cDPIX-lkp@intel.com/ Cc: Eric DeVolder <eric_devolder@yahoo.com> Cc: Ignat Korchagin <ignat@cloudflare.com> Cc: Stephen Rothwell <sfr@canb.auug.org.au> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
2023-07-28MIPS: Loongson64: Fix more __iomem attributesJiaxun Yang
There are some __iomem type casting being missed in previous patch. Fix them here. Reported-by: kernel test robot <lkp@intel.com> Closes: https://lore.kernel.org/oe-kbuild-all/202307020639.QCZOKp8B-lkp@intel.com/ Signed-off-by: Jiaxun Yang <jiaxun.yang@flygoat.com> Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org> Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
2023-05-15MIPS: SMP_CPS: Switch to hotplug core state synchronizationThomas Gleixner
Switch to the CPU hotplug core state tracking and synchronization mechanim. This unfortunately requires to add dead reporting to the non CPS platforms as CPS is the only user, but it allows an overall consolidation of this functionality. No functional change intended. Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Tested-by: Michael Kelley <mikelley@microsoft.com> Tested-by: Oleksandr Natalenko <oleksandr@natalenko.name> Tested-by: Helge Deller <deller@gmx.de> # parisc Tested-by: Guilherme G. Piccoli <gpiccoli@igalia.com> # Steam Deck Link: https://lore.kernel.org/r/20230512205256.803238859@linutronix.de
2023-04-28Merge tag 'objtool-core-2023-04-27' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip Pull objtool updates from Ingo Molnar: - Mark arch_cpu_idle_dead() __noreturn, make all architectures & drivers that did this inconsistently follow this new, common convention, and fix all the fallout that objtool can now detect statically - Fix/improve the ORC unwinder becoming unreliable due to UNWIND_HINT_EMPTY ambiguity, split it into UNWIND_HINT_END_OF_STACK and UNWIND_HINT_UNDEFINED to resolve it - Fix noinstr violations in the KCSAN code and the lkdtm/stackleak code - Generate ORC data for __pfx code - Add more __noreturn annotations to various kernel startup/shutdown and panic functions - Misc improvements & fixes * tag 'objtool-core-2023-04-27' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (52 commits) x86/hyperv: Mark hv_ghcb_terminate() as noreturn scsi: message: fusion: Mark mpt_halt_firmware() __noreturn x86/cpu: Mark {hlt,resume}_play_dead() __noreturn btrfs: Mark btrfs_assertfail() __noreturn objtool: Include weak functions in global_noreturns check cpu: Mark nmi_panic_self_stop() __noreturn cpu: Mark panic_smp_self_stop() __noreturn arm64/cpu: Mark cpu_park_loop() and friends __noreturn x86/head: Mark *_start_kernel() __noreturn init: Mark start_kernel() __noreturn init: Mark [arch_call_]rest_init() __noreturn objtool: Generate ORC data for __pfx code x86/linkage: Fix padding for typed functions objtool: Separate prefix code from stack validation code objtool: Remove superfluous dead_end_function() check objtool: Add symbol iteration helpers objtool: Add WARN_INSN() scripts/objdump-func: Support multiple functions context_tracking: Fix KCSAN noinstr violation objtool: Add stackleak instrumentation to uaccess safe list ...
2023-03-14MIPS: Loongson64: smp: Correct nudge_writes usageJiaxun Yang
Previously every write to SMP regisers are followed by nudge_writes, this incures a huge performance penalty because nudge_writes involves SYNC, which will be globalized on chip. Only set off nudge_writes when we really want other cores to see the result ASAP. Also replace read/write functions to relaxed version because we don't need extra barriers to protect against DMA. Signed-off-by: Jiaxun Yang <jiaxun.yang@flygoat.com> Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
2023-03-14MIPS: Loongson64: smp: Use nudge_writes instead of wbflushJiaxun Yang
wbflush here intends to let other cores see the results ASAP, nudge_writes fits this purpose better. Signed-off-by: Jiaxun Yang <jiaxun.yang@flygoat.com> Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
2023-03-14MIPS: Loongson64: Prefix ipi register address pointers with __iomemJiaxun Yang
They are truely mmio pointers, so give them proper prefix. Signed-off-by: Jiaxun Yang <jiaxun.yang@flygoat.com> Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
2023-03-08mips/cpu: Make sure play_dead() doesn't returnJosh Poimboeuf
play_dead() doesn't return. Make that more explicit with a BUG(). BUG() is preferable to unreachable() because BUG() is a more explicit failure mode and avoids undefined behavior like falling off the edge of the function into whatever code happens to be next. Acked-by: Florian Fainelli <f.fainelli@gmail.com> Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org> Link: https://lore.kernel.org/r/b195e4da190bb06b7d4af15d66ce6129e2347630.1676358308.git.jpoimboe@kernel.org Signed-off-by: Josh Poimboeuf <jpoimboe@kernel.org>
2023-03-08mips/cpu: Expose play_dead()'s prototype definitionJosh Poimboeuf
Include <asm/smp.h> to make sure play_dead() matches its prototype going forward. Acked-by: Florian Fainelli <f.fainelli@gmail.com> Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org> Link: https://lkml.kernel.org/r/20230216184249.ogaqsaykottpxtcb@treble Signed-off-by: Josh Poimboeuf <jpoimboe@kernel.org>
2021-10-26MIPS: loongson64: Drop call to irq_cpu_offline()Marc Zyngier
Also loongson64 calls irq_cpu_offline(), none of its interrupt controllers implement the .irq_cpu_offline callback. It is thus obvious that this call only serves the dubious purpose of wasting precious CPU cycles by iterating over all interrupts. Get rid of the call altogether. Signed-off-by: Marc Zyngier <maz@kernel.org> Acked-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de> Reviewed-by: Florian Fainelli <f.fainelli@gmail.com> Tested-by: Serge Semin <fancer.lancer@gmail.com> Link: https://lore.kernel.org/r/20211021170414.3341522-2-maz@kernel.org
2021-06-01MIPS: Loongson64: Make some functions static in smp.cTiezhu Yang
Make some functions static to fix the following sparse warnings: arch/mips/loongson64/smp.c:54:5: sparse: sparse: symbol 'ipi_read_clear' was not declared. Should it be static? arch/mips/loongson64/smp.c:55:6: sparse: sparse: symbol 'ipi_write_action' was not declared. Should it be static? arch/mips/loongson64/smp.c:56:6: sparse: sparse: symbol 'ipi_write_enable' was not declared. Should it be static? arch/mips/loongson64/smp.c:57:6: sparse: sparse: symbol 'ipi_clear_buf' was not declared. Should it be static? arch/mips/loongson64/smp.c:58:6: sparse: sparse: symbol 'ipi_write_buf' was not declared. Should it be static? Fixes: fed4955f304e ("MIPS: Loongson64: Add Mail_Send support for 3A4000+ CPU") Reported-by: kernel test robot <lkp@intel.com> Signed-off-by: Tiezhu Yang <yangtiezhu@loongson.cn> Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
2021-01-04MIPS: loongson64: smp.c: Fix block comment coding stylesiyanteng
This patch fixes: "WARNING: Block comments use a trailing */ on a separate line" by checkpatch.pl Signed-off-by: siyanteng <siyanteng@loongson.cn> Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
2021-01-04MIPS: Loongson64: Set cluster for coresJiaxun Yang
cluster is required for cacheinfo to set shared_cpu_map correctly. Signed-off-by: Jiaxun Yang <jiaxun.yang@flygoat.com> Reviewed-by: Tiezhu Yang <yangtiezhu@loongson.cn> Tested-by: Tiezhu Yang <yangtiezhu@loongson.cn> Reviewed-by: Huacai Chen <chenhuacai@kernel.org> Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
2020-11-27MIPS: No need to check CPU 0 in {loongson3,bmips,octeon}_cpu_disable()Tiezhu Yang
After commit 9cce844abf07 ("MIPS: CPU#0 is not hotpluggable"), c->hotpluggable is 0 for CPU 0 and it will not generate a control file in sysfs for this CPU: [root@linux loongson]# cat /sys/devices/system/cpu/cpu0/online cat: /sys/devices/system/cpu/cpu0/online: No such file or directory [root@linux loongson]# echo 0 > /sys/devices/system/cpu/cpu0/online bash: /sys/devices/system/cpu/cpu0/online: Permission denied So no need to check CPU 0 in {loongson3,bmips,octeon}_cpu_disable(), just remove them. Signed-off-by: Tiezhu Yang <yangtiezhu@loongson.cn> Acked-by: Florian Fainelli <f.fainelli@gmail.com> Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
2020-11-11MIPS: Loongson64: SMP: Fix up play_dead jump indicatorTiezhu Yang
In play_dead function, the whole 64-bit PC mailbox was used as a indicator to determine if the master core had written boot jump information. However, after we introduced CSR mailsend, the hardware will not guarante an atomic write for the 64-bit PC mailbox. Thus we have to use the lower 32-bit which is written at the last as the jump indicator instead. Signed-off-by: Lu Zeng <zenglu@loongson.cn> Signed-off-by: Jun Yi <yijun@loongson.cn> Signed-off-by: Tiezhu Yang <yangtiezhu@loongson.cn> Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
2020-11-11MIPS: Loongson64: Add Mail_Send support for 3A4000+ CPUTiezhu Yang
Loongson 3A4000+ CPU has per-core Mail_Send register to send mail, there is no need to maintain register address of each core and node, just simply specify cpu number. Signed-off-by: Lu Zeng <zenglu@loongson.cn> Signed-off-by: Jianmin Lv <lvjianmin@loongson.cn> Signed-off-by: Tiezhu Yang <yangtiezhu@loongson.cn> Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
2020-11-11MIPS: Loongson64: Set IPI_Enable register per core by itselfTiezhu Yang
In the current code, for example, core 1 sets Core[0, 1, 2, 3]_IPI_Enalbe register and core 2, 3 do the same thing on the 1-way Loongson64 platform, this is not necessary. Set IPI_Enable register per core by itself to avoid duplicate operations and make the logic more clear. Signed-off-by: Tiezhu Yang <yangtiezhu@loongson.cn> Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
2020-04-16mips: loongsoon2ef: remove private clk apiArnd Bergmann
As platforms are moving to COMMON_CLK in general, loongson2ef stuck out as something that has a private implementation but does not actually use it except for setting the frequency of the CPU itself from the loongson2_cpufreq driver. Change that driver to call the register setting function directly and remove the rest of the stub implementation. Signed-off-by: Arnd Bergmann <arnd@arndb.de> Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org> Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
2020-03-25MIPS: Loongson64: Drop legacy IRQ codeJiaxun Yang
We've made generic irqchip drivers for Loongson-3 platform, it's time to say goodbye to these legacy code. Signed-off-by: Jiaxun Yang <jiaxun.yang@flygoat.com> Co-developed-by: Huacai Chen <chenhc@lemote.com> Signed-off-by: Huacai Chen <chenhc@lemote.com> Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
2019-11-01MIPS: Loongson64: Move files to the top-level directoryJiaxun Yang
Current Loongson-3 code can share among all Loongson64 processors. Signed-off-by: Jiaxun Yang <jiaxun.yang@flygoat.com> Signed-off-by: Paul Burton <paulburton@kernel.org> Cc: linux-mips@vger.kernel.org Cc: chenhc@lemote.com Cc: paul.burton@mips.com
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