linux-dev/arch/parisc/Kconfig, branch master

parisc: Allow CONFIG_64BIT with ARCH=parisc

2022-09-15T05:59:37Z

The previous patch triggered a build failure for the debian kernel, which has CONFIG_64BIT enabled, uses the CROSS_COMPILER environment variable and uses ARCH=parisc to configure the kernel for 64-bit support. This patch weakens the previous patch while keeping the recommended way to configure the kernel with: ARCH=parisc -> build 32-bit kernel ARCH=parisc64 -> build 64-bit kernel while adding the possibility for debian to configure a 64-bit kernel even if ARCH=parisc is set (PA8X00 CPU has to be selected and CONFIG_64BIT needs to be enabled). The downside of this patch is, that we now have a small window open again where people may get it wrong: if they enable CONFIG_64BIT and try to compile with a 32-bit compiler. Fixes: 3dcfb729b5f4 ("parisc: Make CONFIG_64BIT available for ARCH=parisc64 only") Signed-off-by: Helge Deller Cc: # 5.15+

parisc: Make CONFIG_64BIT available for ARCH=parisc64 only

2022-08-22T09:09:17Z

With this patch the ARCH= parameter decides if the CONFIG_64BIT option will be set or not. This means, the ARCH= parameter will give: ARCH=parisc -> 32-bit kernel ARCH=parisc64 -> 64-bit kernel This simplifies the usage of the other config options like randconfig, allmodconfig and allyesconfig a lot and produces the output which is expected for parisc64 (64-bit) vs. parisc (32-bit). Suggested-by: Masahiro Yamada Signed-off-by: Helge Deller Tested-by: Randy Dunlap Reviewed-by: Randy Dunlap Cc: # 5.15+

Merge tag 'asm-generic-6.0' of git://git.kernel.org/pub/scm/linux/kernel/git/arnd/asm-generic

2022-08-05T17:07:23Z

Pull asm-generic updates from Arnd Bergmann: "There are three independent sets of changes: - Sai Prakash Ranjan adds tracing support to the asm-generic version of the MMIO accessors, which is intended to help understand problems with device drivers and has been part of Qualcomm's vendor kernels for many years - A patch from Sebastian Siewior to rework the handling of IRQ stacks in softirqs across architectures, which is needed for enabling PREEMPT_RT - The last patch to remove the CONFIG_VIRT_TO_BUS option and some of the code behind that, after the last users of this old interface made it in through the netdev, scsi, media and staging trees" * tag 'asm-generic-6.0' of git://git.kernel.org/pub/scm/linux/kernel/git/arnd/asm-generic: uapi: asm-generic: fcntl: Fix typo 'the the' in comment arch/*/: remove CONFIG_VIRT_TO_BUS soc: qcom: geni: Disable MMIO tracing for GENI SE serial: qcom_geni_serial: Disable MMIO tracing for geni serial asm-generic/io: Add logging support for MMIO accessors KVM: arm64: Add a flag to disable MMIO trace for nVHE KVM lib: Add register read/write tracing support drm/meson: Fix overflow implicit truncation warnings irqchip/tegra: Fix overflow implicit truncation warnings coresight: etm4x: Use asm-generic IO memory barriers arm64: io: Use asm-generic high level MMIO accessors arch/*: Disable softirq stacks on PREEMPT_RT.

arch/*/: remove CONFIG_VIRT_TO_BUS

2022-06-28T11:20:21Z

All architecture-independent users of virt_to_bus() and bus_to_virt() have been fixed to use the dma mapping interfaces or have been removed now. This means the definitions on most architectures, and the CONFIG_VIRT_TO_BUS symbol are now obsolete and can be removed. The only exceptions to this are a few network and scsi drivers for m68k Amiga and VME machines and ppc32 Macintosh. These drivers work correctly with the old interfaces and are probably not worth changing. On alpha and parisc, virt_to_bus() were still used in asm/floppy.h. alpha can use isa_virt_to_bus() like x86 does, and parisc can just open-code the virt_to_phys() here, as this is architecture specific code. I tried updating the bus-virt-phys-mapping.rst documentation, which started as an email from Linus to explain some details of the Linux-2.0 driver interfaces. The bits about virt_to_bus() were declared obsolete backin 2000, and the rest is not all that relevant any more, so in the end I just decided to remove the file completely. Reviewed-by: Geert Uytterhoeven Acked-by: Geert Uytterhoeven Acked-by: Michael Ellerman (powerpc) Acked-by: Helge Deller # parisc Signed-off-by: Arnd Bergmann

parisc: Enable ARCH_HAS_STRICT_MODULE_RWX

2022-06-26T10:23:15Z

Fix a boot crash on a c8000 machine as reported by Dave. Basically it changes patch_map() to return an alias mapping to the to-be-patched code in order to prevent writing to write-protected memory. Signed-off-by: Helge Deller Suggested-by: John David Anglin Cc: stable@vger.kernel.org # v5.2+ Link: https://lore.kernel.org/all/e8ec39e8-25f8-e6b4-b7ed-4cb23efc756e@bell.net/

Merge tag 'riscv-for-linus-5.19-mw0' of git://git.kernel.org/pub/scm/linux/kernel/git/riscv/linux

2022-05-31T21:10:54Z

Pull RISC-V updates from Palmer Dabbelt: - Support for the Svpbmt extension, which allows memory attributes to be encoded in pages - Support for the Allwinner D1's implementation of page-based memory attributes - Support for running rv32 binaries on rv64 systems, via the compat subsystem - Support for kexec_file() - Support for the new generic ticket-based spinlocks, which allows us to also move to qrwlock. These should have already gone in through the asm-geneic tree as well - A handful of cleanups and fixes, include some larger ones around atomics and XIP * tag 'riscv-for-linus-5.19-mw0' of git://git.kernel.org/pub/scm/linux/kernel/git/riscv/linux: (51 commits) RISC-V: Prepare dropping week attribute from arch_kexec_apply_relocations[_add] riscv: compat: Using seperated vdso_maps for compat_vdso_info RISC-V: Fix the XIP build RISC-V: Split out the XIP fixups into their own file RISC-V: ignore xipImage RISC-V: Avoid empty create_*_mapping definitions riscv: Don't output a bogus mmu-type on a no MMU kernel riscv: atomic: Add custom conditional atomic operation implementation riscv: atomic: Optimize dec_if_positive functions riscv: atomic: Cleanup unnecessary definition RISC-V: Load purgatory in kexec_file RISC-V: Add purgatory RISC-V: Support for kexec_file on panic RISC-V: Add kexec_file support RISC-V: use memcpy for kexec_file mode kexec_file: Fix kexec_file.c build error for riscv platform riscv: compat: Add COMPAT Kbuild skeletal support riscv: compat: ptrace: Add compat_arch_ptrace implement riscv: compat: signal: Add rt_frame implementation riscv: add memory-type errata for T-Head ...

parisc: Re-enable GENERIC_CPU_DEVICES for !SMP

2022-05-08T18:01:11Z

In commit 62773112acc5 ("parisc: Switch from GENERIC_CPU_DEVICES to GENERIC_ARCH_TOPOLOGY") GENERIC_CPU_DEVICES was unconditionally turned off, but this triggers a warning in topology_add_dev(). Turning it back on for the !SMP case avoids this warning. Reported-by: Guenter Roeck Tested-by: Guenter Roeck Fixes: 62773112acc5 ("parisc: Switch from GENERIC_CPU_DEVICES to GENERIC_ARCH_TOPOLOGY") Signed-off-by: Helge Deller

arch: Add SYSVIPC_COMPAT for all architectures

2022-04-26T20:35:37Z

The existing per-arch definitions are pretty much historic cruft. Move SYSVIPC_COMPAT into init/Kconfig. Signed-off-by: Guo Ren Signed-off-by: Guo Ren Acked-by: Arnd Bergmann Reviewed-by: Christoph Hellwig Tested-by: Heiko Stuebner Acked-by: Helge Deller # parisc Link: https://lore.kernel.org/r/20220405071314.3225832-5-guoren@kernel.org Signed-off-by: Palmer Dabbelt

parisc: Implement __cpu_die() and __cpu_disable() for CPU hotplugging

2022-03-29T19:37:12Z

Add relevant code to __cpu_die() and __cpu_disable() to finally enable the CPU hotplugging features. Reset the irq count values in smp_callin() to zero before bringing up the CPU. It seems that the firmware may need up to 8 seconds to fully stop a CPU in which no other PDC calls are allowed to be made. Use a timeout __cpu_die() to accommodate for this. Use "chcpu -d 1" to bring CPU1 down, and "chcpu -e 1" to bring it up. Signed-off-by: Helge Deller

parisc: Switch from GENERIC_CPU_DEVICES to GENERIC_ARCH_TOPOLOGY

2022-03-29T19:37:12Z

Switch away from the own cpu topology code to common code which is used by ARM64 and RISCV. That will allow us to enable CPU hotplug later on. Signed-off-by: Helge Deller