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* | riscv: efi: enable generic EFI compressed bootArd Biesheuvel2022-09-201-1/+5
|/ | | | | | | | Wire up the generic EFI zboot support for RISC-V. Signed-off-by: Ard Biesheuvel <ardb@kernel.org> Acked-by: Palmer Dabbelt <palmer@rivosinc.com> Tested-by: Conor Dooley <conor.dooley@microchip.com>
* arch/riscv: add Zihintpause supportDao Lu2022-08-111-0/+4
| | | | | | | | | | | | | | | Implement support for the ZiHintPause extension. The PAUSE instruction is a HINT that indicates the current hart’s rate of instruction retirement should be temporarily reduced or paused. Reviewed-by: Heiko Stuebner <heiko@sntech.de> Tested-by: Heiko Stuebner <heiko@sntech.de> Signed-off-by: Dao Lu <daolu@rivosinc.com> [Palmer: Some minor merge conflicts.] Link: https://lore.kernel.org/all/20220620201530.3929352-1-daolu@rivosinc.com/ Link: https://lore.kernel.org/all/20220811053356.17375-1-palmer@rivosinc.com/ Signed-off-by: Palmer Dabbelt <palmer@rivosinc.com>
* riscv: implement Zicbom-based CMO instructions + the t-head variantPalmer Dabbelt2022-08-101-0/+4
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This series is based on the alternatives changes done in my svpbmt series and thus also depends on Atish's isa-extension parsing series. It implements using the cache-management instructions from the Zicbom- extension to handle cache flush, etc actions on platforms needing them. SoCs using cpu cores from T-Head like the Allwinne D1 implement a different set of cache instructions. But while they are different, instructions they provide the same functionality, so a variant can easly hook into the existing alternatives mechanism on those. [Palmer: Some minor fixups, including a RISCV_ISA_ZICBOM dependency on MMU that's probably not strictly necessary. The Zicbom support will trip up sparse for users that have new toolchains, I just sent a patch.] Link: https://lore.kernel.org/all/20220706231536.2041855-1-heiko@sntech.de/ Link: https://lore.kernel.org/linux-sparse/20220811033138.20676-1-palmer@rivosinc.com/T/#u * palmer/riscv-zicbom: riscv: implement cache-management errata for T-Head SoCs riscv: Add support for non-coherent devices using zicbom extension dt-bindings: riscv: document cbom-block-size of: also handle dma-noncoherent in of_dma_is_coherent()
| * riscv: Add support for non-coherent devices using zicbom extensionHeiko Stuebner2022-07-281-0/+4
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The Zicbom ISA-extension was ratified in november 2021 and introduces instructions for dcache invalidate, clean and flush operations. Implement cache management operations for non-coherent devices based on them. Of course not all cores will support this, so implement an alternative-based mechanism that replaces empty instructions with ones done around Zicbom instructions. As discussed in previous versions, assume the platform being coherent by default so that non-coherent devices need to get marked accordingly by firmware. Reviewed-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Heiko Stuebner <heiko@sntech.de> Reviewed-by: Guo Ren <guoren@kernel.org> Link: https://lore.kernel.org/r/20220706231536.2041855-4-heiko@sntech.de Signed-off-by: Palmer Dabbelt <palmer@rivosinc.com>
* | riscv: compat: vdso: Fix vdso_install targetEmil Renner Berthing2022-07-221-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | When CONFIG_COMPAT=y the vdso_install target fails: $ make ARCH=riscv CROSS_COMPILE=riscv64-linux-gnu- vdso_install INSTALL vdso.so make[1]: *** No rule to make target 'vdso_install'. Stop. make: *** [arch/riscv/Makefile:112: vdso_install] Error 2 The problem is that arch/riscv/kernel/compat_vdso/Makefile doesn't have a vdso_install target, but instead calls it compat_vdso_install. Signed-off-by: Emil Renner Berthing <emil.renner.berthing@canonical.com> Link: https://lore.kernel.org/r/20220625154207.80972-1-emil.renner.berthing@canonical.com Fixes: 0715372a06ce ("riscv: compat: vdso: Add COMPAT_VDSO base code implementation") Cc: stable@vger.kernel.org Signed-off-by: Palmer Dabbelt <palmer@rivosinc.com>
* | riscv: add as-options for modules with assembly compontentsBen Dooks2022-07-211-0/+1
|/ | | | | | | | | | | | | | | | | | | | | | | | | | | When trying to load modules built for RISC-V which include assembly files the kernel loader errors with "unexpected relocation type 'R_RISCV_ALIGN'" due to R_RISCV_ALIGN relocations being generated by the assembler. The R_RISCV_ALIGN relocations can be removed at the expense of code space by adding -mno-relax to gcc and as. In commit 7a8e7da42250138 ("RISC-V: Fixes to module loading") -mno-relax is added to the build variable KBUILD_CFLAGS_MODULE. See [1] for more info. The issue is that when kbuild builds a .S file, it invokes gcc with the -mno-relax flag, but this is not being passed through to the assembler. Adding -Wa,-mno-relax to KBUILD_AFLAGS_MODULE ensures that the assembler is invoked correctly. This may have now been fixed in gcc[2] and this addition should not stop newer gcc and as from working. [1] https://github.com/riscv/riscv-elf-psabi-doc/issues/183 [2] https://github.com/gcc-mirror/gcc/commit/3b0a7d624e64eeb81e4d5e8c62c46d86ef521857 Signed-off-by: Ben Dooks <ben.dooks@codethink.co.uk> Reviewed-by: Bin Meng <bmeng.cn@gmail.com> Link: https://lore.kernel.org/r/20220529152200.609809-1-ben.dooks@codethink.co.uk Fixes: ab1ef68e5401 ("RISC-V: Add sections of PLT and GOT for kernel module") Cc: stable@vger.kernel.org Signed-off-by: Palmer Dabbelt <palmer@rivosinc.com>
* riscv: move errata/ and kvm/ builds to arch/riscv/KbuildMasahiro Yamada2022-06-011-3/+0
| | | | | | | | | Commit 909548d6c578 ("riscv: add arch/riscv/Kbuild") intended that subdirectories in arch/riscv/ would be added in arch/riscv/Kbuild. Signed-off-by: Masahiro Yamada <masahiroy@kernel.org> Reviewed-by: Anup Patel <anup@brainfault.org> Signed-off-by: Palmer Dabbelt <palmer@rivosinc.com>
* Merge tag 'riscv-for-linus-5.19-mw0' of ↵Linus Torvalds2022-05-311-1/+10
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/riscv/linux 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 ...
| * RISC-V: Add support for rv32 userspace via COMPATPalmer Dabbelt2022-05-191-0/+9
| |\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The RISC-V port supports the rv32i and rv64i base ISAs, but provides no mechanism to run 32-bit userspace on 64-bit systems. This adds that support, via the COMPAT framework. As the RISC-V ISAs (and uABIs) were developed concurrently, the resulting compat support is mostly generic. This includes a handful of cleanups to the generic compat infrastructure to more cleanly support RISC-V, followed by the RISC-V implementation. * palmer/riscv-compat: riscv: compat: Add COMPAT Kbuild skeletal support riscv: compat: ptrace: Add compat_arch_ptrace implement riscv: compat: signal: Add rt_frame implementation riscv: compat: vdso: Add setup additional pages implementation riscv: compat: vdso: Add COMPAT_VDSO base code implementation riscv: compat: Add hw capability check for elf riscv: compat: Add elf.h implementation riscv: compat: process: Add UXL_32 support in start_thread riscv: compat: syscall: Add entry.S implementation riscv: compat: syscall: Add compat_sys_call_table implementation riscv: compat: Support TASK_SIZE for compat mode riscv: compat: Add basic compat data type implementation riscv: Fixup difference with defconfig syscalls: compat: Fix the missing part for __SYSCALL_COMPAT asm-generic: compat: Cleanup duplicate definitions fs: stat: compat: Add __ARCH_WANT_COMPAT_STAT arch: Add SYSVIPC_COMPAT for all architectures compat: consolidate the compat_flock{,64} definition uapi: always define F_GETLK64/F_SETLK64/F_SETLKW64 in fcntl.h uapi: simplify __ARCH_FLOCK{,64}_PAD a little
| | * riscv: compat: vdso: Add COMPAT_VDSO base code implementationGuo Ren2022-04-261-0/+5
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | There is no vgettimeofday supported in rv32 that makes simple to generate rv32 vdso code which only needs riscv64 compiler. Other architectures need change compiler or -m (machine parameter) to support vdso32 compiling. If rv32 support vgettimeofday (which cause C compile) in future, we would add CROSS_COMPILE to support that makes more requirement on compiler enviornment. linux-rv64/arch/riscv/kernel/compat_vdso/compat_vdso.so.dbg: file format elf64-littleriscv Disassembly of section .text: 0000000000000800 <__vdso_rt_sigreturn>: 800: 08b00893 li a7,139 804: 00000073 ecall 808: 0000 unimp ... 000000000000080c <__vdso_getcpu>: 80c: 0a800893 li a7,168 810: 00000073 ecall 814: 8082 ret ... 0000000000000818 <__vdso_flush_icache>: 818: 10300893 li a7,259 81c: 00000073 ecall 820: 8082 ret linux-rv32/arch/riscv/kernel/vdso/vdso.so.dbg: file format elf32-littleriscv Disassembly of section .text: 00000800 <__vdso_rt_sigreturn>: 800: 08b00893 li a7,139 804: 00000073 ecall 808: 0000 unimp ... 0000080c <__vdso_getcpu>: 80c: 0a800893 li a7,168 810: 00000073 ecall 814: 8082 ret ... 00000818 <__vdso_flush_icache>: 818: 10300893 li a7,259 81c: 00000073 ecall 820: 8082 ret Finally, reuse all *.S from vdso in compat_vdso that makes implementation clear and readable. Signed-off-by: Guo Ren <guoren@linux.alibaba.com> Signed-off-by: Guo Ren <guoren@kernel.org> Tested-by: Heiko Stuebner <heiko@sntech.de> Link: https://lore.kernel.org/r/20220405071314.3225832-17-guoren@kernel.org Signed-off-by: Palmer Dabbelt <palmer@rivosinc.com>
| | * riscv: Fixup difference with defconfigGuo Ren2022-04-261-0/+4
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Let's follow the origin patch's spirit: The only difference between rv32_defconfig and defconfig is that rv32_defconfig has CONFIG_ARCH_RV32I=y. This is helpful to compare rv64-compat-rv32 v.s. rv32-linux. Fixes: 1b937e8faa87ccfb ("RISC-V: Add separate defconfig for 32bit systems") Signed-off-by: Guo Ren <guoren@linux.alibaba.com> Signed-off-by: Guo Ren <guoren@kernel.org> Reviewed-by: Arnd Bergmann <arnd@arndb.de> Tested-by: Heiko Stuebner <heiko@sntech.de> Link: https://lore.kernel.org/r/20220405071314.3225832-9-guoren@kernel.org Signed-off-by: Palmer Dabbelt <palmer@rivosinc.com>
| * | riscv: integrate alternatives better into the main architectureHeiko Stuebner2022-05-111-1/+1
| |/ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Right now the alternatives need to be explicitly enabled and erratas are limited to SiFive ones. We want to use alternatives not only for patching soc erratas, but in the future also for handling different behaviour depending on the existence of future extensions. So move the core alternatives over to the kernel subdirectory and move the CONFIG_RISCV_ALTERNATIVE to be a hidden symbol which we expect relevant erratas and extensions to just select if needed. Signed-off-by: Heiko Stuebner <heiko@sntech.de> Reviewed-by: Philipp Tomsich <philipp.tomsich@vrull.eu> Link: https://lore.kernel.org/r/20220511192921.2223629-2-heiko@sntech.de Signed-off-by: Palmer Dabbelt <palmer@rivosinc.com>
* / kbuild: factor out the common installation code into scripts/install.shMasahiro Yamada2022-05-111-4/+3
|/ | | | | | | | | | | | | | | | Many architectures have similar install.sh scripts. The first half is really generic; it verifies that the kernel image and System.map exist, then executes ~/bin/${INSTALLKERNEL} or /sbin/${INSTALLKERNEL} if available. The second half is kind of arch-specific; it copies the kernel image and System.map to the destination, but the code is slightly different. Factor out the generic part into scripts/install.sh. Signed-off-by: Masahiro Yamada <masahiroy@kernel.org> Reviewed-by: Nicolas Schier <n.schier@avm.de>
* riscv: fix build with binutils 2.38Aurelien Jarno2022-02-101-0/+6
| | | | | | | | | | | | | | | | | | | | | | | | From version 2.38, binutils default to ISA spec version 20191213. This means that the csr read/write (csrr*/csrw*) instructions and fence.i instruction has separated from the `I` extension, become two standalone extensions: Zicsr and Zifencei. As the kernel uses those instruction, this causes the following build failure: CC arch/riscv/kernel/vdso/vgettimeofday.o <<BUILDDIR>>/arch/riscv/include/asm/vdso/gettimeofday.h: Assembler messages: <<BUILDDIR>>/arch/riscv/include/asm/vdso/gettimeofday.h:71: Error: unrecognized opcode `csrr a5,0xc01' <<BUILDDIR>>/arch/riscv/include/asm/vdso/gettimeofday.h:71: Error: unrecognized opcode `csrr a5,0xc01' <<BUILDDIR>>/arch/riscv/include/asm/vdso/gettimeofday.h:71: Error: unrecognized opcode `csrr a5,0xc01' <<BUILDDIR>>/arch/riscv/include/asm/vdso/gettimeofday.h:71: Error: unrecognized opcode `csrr a5,0xc01' The fix is to specify those extensions explicitely in -march. However as older binutils version do not support this, we first need to detect that. Signed-off-by: Aurelien Jarno <aurelien@aurel32.net> Tested-by: Alexandre Ghiti <alexandre.ghiti@canonical.com> Cc: stable@vger.kernel.org Signed-off-by: Palmer Dabbelt <palmer@rivosinc.com>
* riscv: fix building external modulesAndreas Schwab2021-11-181-0/+2
| | | | | | | | | | | When building external modules, vdso_prepare should not be run. If the kernel sources are read-only, it will fail. Fixes: fde9c59aebaf ("riscv: explicitly use symbol offsets for VDSO") Signed-off-by: Andreas Schwab <schwab@suse.de> Reviewed-by: Nathan Chancellor <nathan@kernel.org> Tested-by: Nathan Chancellor <nathan@kernel.org> Signed-off-by: Palmer Dabbelt <palmer@rivosinc.com>
* Merge tag 'riscv-for-linus-5.16-mw1' of ↵Linus Torvalds2021-11-131-0/+10
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/riscv/linux Pull RISC-V updates from Palmer Dabbelt: - Support for time namespaces in the VDSO, along with some associated cleanups. - Support for building rv32 randconfigs. - Improvements to the XIP port that allow larger kernels to function - Various device tree cleanups for both the SiFive and Microchip boards - A handful of defconfig updates, including enabling Nouveau. There are also various small cleanups. * tag 'riscv-for-linus-5.16-mw1' of git://git.kernel.org/pub/scm/linux/kernel/git/riscv/linux: riscv: defconfig: enable DRM_NOUVEAU riscv/vdso: Drop unneeded part due to merge issue riscv: remove .text section size limitation for XIP riscv: dts: sifive: add missing compatible for plic riscv: dts: microchip: add missing compatibles for clint and plic riscv: dts: sifive: drop duplicated nodes and properties in sifive riscv: dts: sifive: fix Unleashed board compatible riscv: dts: sifive: use only generic JEDEC SPI NOR flash compatible riscv: dts: microchip: use vendor compatible for Cadence SD4HC riscv: dts: microchip: drop unused pinctrl-names riscv: dts: microchip: drop duplicated MMC/SDHC node riscv: dts: microchip: fix board compatible riscv: dts: microchip: drop duplicated nodes dt-bindings: mmc: cdns: document Microchip MPFS MMC/SDHCI controller riscv: add rv32 and rv64 randconfig build targets riscv: mm: don't advertise 1 num_asid for 0 asid bits riscv: set default pm_power_off to NULL riscv/vdso: Add support for time namespaces
| * riscv: add rv32 and rv64 randconfig build targetsRandy Dunlap2021-10-041-0/+10
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Add the ability to do randconfig build targets for both rv32 and rv64. Based on a similar patch by Michael Ellerman for PowerPC. Usage: make ARCH=riscv rv32_randconfig or make ARCH=riscv rv64_randconfig Signed-off-by: Randy Dunlap <rdunlap@infradead.org> Signed-off-by: Palmer Dabbelt <palmerdabbelt@google.com>
* | Merge tag 'kbuild-v5.16' of ↵Linus Torvalds2021-11-081-6/+1
|\ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild Pull Kbuild updates from Masahiro Yamada: - Remove the global -isystem compiler flag, which was made possible by the introduction of <linux/stdarg.h> - Improve the Kconfig help to print the location in the top menu level - Fix "FORCE prerequisite is missing" build warning for sparc - Add new build targets, tarzst-pkg and perf-tarzst-src-pkg, which generate a zstd-compressed tarball - Prevent gen_init_cpio tool from generating a corrupted cpio when KBUILD_BUILD_TIMESTAMP is set to 2106-02-07 or later - Misc cleanups * tag 'kbuild-v5.16' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild: (28 commits) kbuild: use more subdir- for visiting subdirectories while cleaning sh: remove meaningless archclean line initramfs: Check timestamp to prevent broken cpio archive kbuild: split DEBUG_CFLAGS out to scripts/Makefile.debug gen_init_cpio: add static const qualifiers kbuild: Add make tarzst-pkg build option scripts: update the comments of kallsyms support sparc: Add missing "FORCE" target when using if_changed kconfig: refactor conf_touch_dep() kconfig: refactor conf_write_dep() kconfig: refactor conf_write_autoconf() kconfig: add conf_get_autoheader_name() kconfig: move sym_escape_string_value() to confdata.c kconfig: refactor listnewconfig code kconfig: refactor conf_write_symbol() kconfig: refactor conf_write_heading() kconfig: remove 'const' from the return type of sym_escape_string_value() kconfig: rename a variable in the lexer to a clearer name kconfig: narrow the scope of variables in the lexer kconfig: Create links to main menu items in search ...
| * | kbuild: use more subdir- for visiting subdirectories while cleaningMasahiro Yamada2021-10-241-6/+1
| |/ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Documentation/kbuild/makefiles.rst suggests to use "archclean" for cleaning arch/$(SRCARCH)/boot/, but it is not a hard requirement. Since commit d92cc4d51643 ("kbuild: require all architectures to have arch/$(SRCARCH)/Kbuild"), we can use the "subdir- += boot" trick for all architectures. This can take advantage of the parallel option (-j) for "make clean". I also cleaned up the comments in arch/$(SRCARCH)/Makefile. The "archdep" target no longer exists. Signed-off-by: Masahiro Yamada <masahiroy@kernel.org> Reviewed-by: Kees Cook <keescook@chromium.org> Acked-by: Geert Uytterhoeven <geert@linux-m68k.org> Acked-by: Michael Ellerman <mpe@ellerman.id.au> (powerpc)
* / RISC-V: Add initial skeletal KVM supportAnup Patel2021-10-041-0/+1
|/ | | | | | | | | | | | | | | | | This patch adds initial skeletal KVM RISC-V support which has: 1. A simple implementation of arch specific VM functions except kvm_vm_ioctl_get_dirty_log() which will implemeted in-future as part of stage2 page loging. 2. Stubs of required arch specific VCPU functions except kvm_arch_vcpu_ioctl_run() which is semi-complete and extended by subsequent patches. 3. Stubs for required arch specific stage2 MMU functions. Signed-off-by: Anup Patel <anup.patel@wdc.com> Acked-by: Paolo Bonzini <pbonzini@redhat.com> Reviewed-by: Paolo Bonzini <pbonzini@redhat.com> Reviewed-by: Alexander Graf <graf@amazon.com> Acked-by: Palmer Dabbelt <palmerdabbelt@google.com>
* riscv: move the (z)install rules to arch/riscv/MakefileMasahiro Yamada2021-09-101-2/+5
| | | | | | | | | | | Currently, the (z)install targets in arch/riscv/Makefile descend into arch/riscv/boot/Makefile to invoke the shell script, but there is no good reason to do so. arch/riscv/Makefile can run the shell script directly. Signed-off-by: Masahiro Yamada <masahiroy@kernel.org> Signed-off-by: Palmer Dabbelt <palmerdabbelt@google.com>
* Merge tag 'riscv-for-linus-5.15-mw0' of ↵Linus Torvalds2021-09-051-0/+6
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/riscv/linux Pull RISC-V updates from Palmer Dabbelt: - support PC-relative instructions (auipc and branches) in kprobes - support for forced IRQ threading - support for the hlt/nohlt kernel command line options, via the generic idle loop - show the edge/level triggered behavior of interrupts in /proc/interrupts - a handful of cleanups to our address mapping mechanisms - support for allocating gigantic hugepages via CMA - support for the undefined behavior sanitizer (UBSAN) - a handful of cleanups to the VDSO that allow the kernel to build with LLD. - support for hugepage migration * tag 'riscv-for-linus-5.15-mw0' of git://git.kernel.org/pub/scm/linux/kernel/git/riscv/linux: (21 commits) riscv: add support for hugepage migration RISC-V: Fix VDSO build for !MMU riscv: use strscpy to replace strlcpy riscv: explicitly use symbol offsets for VDSO riscv: Enable Undefined Behavior Sanitizer UBSAN riscv: Keep the riscv Kconfig selects sorted riscv: Support allocating gigantic hugepages using CMA riscv: fix the global name pfn_base confliction error riscv: Move early fdt mapping creation in its own function riscv: Simplify BUILTIN_DTB device tree mapping handling riscv: Use __maybe_unused instead of #ifdefs around variable declarations riscv: Get rid of map_size parameter to create_kernel_page_table riscv: Introduce va_kernel_pa_offset for 32-bit kernel riscv: Optimize kernel virtual address conversion macro dt-bindings: riscv: add starfive jh7100 bindings riscv: Enable GENERIC_IRQ_SHOW_LEVEL riscv: Enable idle generic idle loop riscv: Allow forced irq threading riscv: Implement thread_struct whitelist for hardened usercopy riscv: kprobes: implement the branch instructions ...
| * RISC-V: Fix VDSO build for !MMUPalmer Dabbelt2021-08-251-0/+2
| | | | | | | | | | | | | | | | We don't have a VDSO for the !MMU configurations, so don't try to build one. Fixes: fde9c59aebaf ("riscv: explicitly use symbol offsets for VDSO") Signed-off-by: Palmer Dabbelt <palmerdabbelt@google.com>
| * riscv: explicitly use symbol offsets for VDSOSaleem Abdulrasool2021-08-241-0/+4
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The current implementation of the `__rt_sigaction` reference computed an absolute offset relative to the mapped base of the VDSO. While this can be handled in the medlow model, the medany model cannot handle this as it is meant to be position independent. The current implementation relied on the BFD linker relaxing the PC-relative relocation into an absolute relocation as it was a near-zero address allowing it to be referenced relative to `zero`. We now extract the offsets and create a generated header allowing the build with LLVM and lld to succeed as we no longer depend on the linker rewriting address references near zero. This change was largely modelled after the ARM64 target which does something similar. Signed-off-by: Saleem Abdulrasool <abdulras@google.com> Tested-by: Nathan Chancellor <nathan@kernel.org> Signed-off-by: Palmer Dabbelt <palmerdabbelt@google.com>
* | kbuild: check CONFIG_AS_IS_LLVM instead of LLVM_IASMasahiro Yamada2021-08-101-1/+1
|/ | | | | | | | | | | | | | | | | | | | | | | | | | LLVM_IAS is the user interface to set the -(no-)integrated-as flag, and it should be used only for that purpose. LLVM_IAS is checked in some places to determine the assembler type, but it is not precise. For example, $ make CC=gcc LLVM_IAS=1 ... will use the GNU assembler (i.e. binutils) since LLVM_IAS=1 is effective only when $(CC) is clang. Of course, 'CC=gcc LLVM_IAS=1' is an odd combination, but the build system can be more robust against such insane input. Commit ba64beb17493a ("kbuild: check the minimum assembler version in Kconfig") introduced CONFIG_AS_IS_GNU/LLVM, which is more precise because Kconfig checks the version string from the assembler in use. Signed-off-by: Masahiro Yamada <masahiroy@kernel.org> Reviewed-by: Nick Desaulniers <ndesaulniers@google.com> Reviewed-by: Nathan Chancellor <nathan@kernel.org>
* Merge tag 'kbuild-v5.14' of ↵Linus Torvalds2021-07-101-1/+0
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild Pull Kbuild updates from Masahiro Yamada: - Increase the -falign-functions alignment for the debug option. - Remove ugly libelf checks from the top Makefile. - Make the silent build (-s) more silent. - Re-compile the kernel if KBUILD_BUILD_TIMESTAMP is specified. - Various script cleanups * tag 'kbuild-v5.14' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild: (27 commits) scripts: add generic syscallnr.sh scripts: check duplicated syscall number in syscall table sparc: syscalls: use pattern rules to generate syscall headers parisc: syscalls: use pattern rules to generate syscall headers nds32: add arch/nds32/boot/.gitignore kbuild: mkcompile_h: consider timestamp if KBUILD_BUILD_TIMESTAMP is set kbuild: modpost: Explicitly warn about unprototyped symbols kbuild: remove trailing slashes from $(KBUILD_EXTMOD) kconfig.h: explain IS_MODULE(), IS_ENABLED() kconfig: constify long_opts scripts/setlocalversion: simplify the short version part scripts/setlocalversion: factor out 12-chars hash construction scripts/setlocalversion: add more comments to -dirty flag detection scripts/setlocalversion: remove workaround for old make-kpkg scripts/setlocalversion: remove mercurial, svn and git-svn supports kbuild: clean up ${quiet} checks in shell scripts kbuild: sink stdout from cmd for silent build init: use $(call cmd,) for generating include/generated/compile.h kbuild: merge scripts/mkmakefile to top Makefile sh: move core-y in arch/sh/Makefile to arch/sh/Kbuild ...
| * kbuild: require all architectures to have arch/$(SRCARCH)/KbuildMasahiro Yamada2021-05-261-1/+0
| | | | | | | | | | | | | | | | | | arch/$(SRCARCH)/Kbuild is useful for Makefile cleanups because you can use the obj-y syntax. Add an empty file if it is missing in arch/$(SRCARCH)/. Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
* | riscv32: Use medany C model for modulesKhem Raj2021-06-121-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | When CONFIG_CMODEL_MEDLOW is used it ends up generating riscv_hi20_rela relocations in modules which are not resolved during runtime and following errors would be seen [ 4.802714] virtio_input: target 00000000c1539090 can not be addressed by the 32-bit offset from PC = 39148b7b [ 4.854800] virtio_input: target 00000000c1539090 can not be addressed by the 32-bit offset from PC = 9774456d Signed-off-by: Khem Raj <raj.khem@gmail.com> Signed-off-by: Palmer Dabbelt <palmerdabbelt@google.com>
* | riscv: Use -mno-relax when using lld linkerKhem Raj2021-05-291-0/+9
|/ | | | | | | | | | | | | | | | | lld does not implement the RISCV relaxation optimizations like GNU ld therefore disable it when building with lld, Also pass it to assembler when using external GNU assembler ( LLVM_IAS != 1 ), this ensures that relevant assembler option is also enabled along. if these options are not used then we see following relocations in objects 0000000000000000 R_RISCV_ALIGN *ABS*+0x0000000000000002 These are then rejected by lld ld.lld: error: capability.c:(.fixup+0x0): relocation R_RISCV_ALIGN requires unimplemented linker relaxation; recompile with -mno-relax but the .o is already compiled with -mno-relax Signed-off-by: Khem Raj <raj.khem@gmail.com> Reviewed-by: Nathan Chancellor <nathan@kernel.org> Signed-off-by: Palmer Dabbelt <palmerdabbelt@google.com>
* RISC-V: enable XIPVitaly Wool2021-04-261-1/+7
| | | | | | | | | | | | | | | | | | | | | Introduce XIP (eXecute In Place) support for RISC-V platforms. It allows code to be executed directly from non-volatile storage directly addressable by the CPU, such as QSPI NOR flash which can be found on many RISC-V platforms. This makes way for significant optimization of RAM footprint. The XIP kernel is not compressed since it has to run directly from flash, so it will occupy more space on the non-volatile storage. The physical flash address used to link the kernel object files and for storing it has to be known at compile time and is represented by a Kconfig option. XIP on RISC-V will for the time being only work on MMU-enabled kernels. Signed-off-by: Vitaly Wool <vitaly.wool@konsulko.com> [Alex: Rebase on top of "Move kernel mapping outside the linear mapping" ] Signed-off-by: Alexandre Ghiti <alex@ghiti.fr> [Palmer: disable XIP for allyesconfig] Signed-off-by: Palmer Dabbelt <palmerdabbelt@google.com>
* riscv: Introduce alternative mechanism to apply errata solutionVincent Chen2021-04-261-0/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | Introduce the "alternative" mechanism from ARM64 and x86 to apply the CPU vendors' errata solution at runtime. The main purpose of this patch is to provide a framework. Therefore, the implementation is quite basic for now so that some scenarios could not use this schemei, such as patching code to a module, relocating the patching code and heterogeneous CPU topology. Users could use the macro ALTERNATIVE to apply an errata to the existing code flow. In the macro ALTERNATIVE, users need to specify the manufacturer information(vendorid, archid, and impid) for this errata. Therefore, kernel will know this errata is suitable for which CPU core. During the booting procedure, kernel will select the errata required by the CPU core and then patch it. It means that the kernel only applies the errata to the specified CPU core. In this case, the vendor's errata does not affect each other at runtime. The above patching procedure only occurs during the booting phase, so we only take the overhead of the "alternative" mechanism once. This "alternative" mechanism is enabled by default to ensure that all required errata will be applied. However, users can disable this feature by the Kconfig "CONFIG_RISCV_ERRATA_ALTERNATIVE". Signed-off-by: Vincent Chen <vincent.chen@sifive.com> Reviewed-by: Anup Patel <anup@brainfault.org> Signed-off-by: Palmer Dabbelt <palmerdabbelt@google.com>
* riscv: Enable per-task stack canariesGuo Ren2021-01-141-0/+10
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This enables the use of per-task stack canary values if GCC has support for emitting the stack canary reference relative to the value of tp, which holds the task struct pointer in the riscv kernel. After compare arm64 and x86 implementations, seems arm64's is more flexible and readable. The key point is how gcc get the offset of stack_canary from gs/el0_sp. x86: Use a fix offset from gs, not flexible. struct fixed_percpu_data { /* * GCC hardcodes the stack canary as %gs:40. Since the * irq_stack is the object at %gs:0, we reserve the bottom * 48 bytes of the irq stack for the canary. */ char gs_base[40]; // :( unsigned long stack_canary; }; arm64: Use -mstack-protector-guard-offset & guard-reg gcc options: -mstack-protector-guard=sysreg -mstack-protector-guard-reg=sp_el0 -mstack-protector-guard-offset=xxx riscv: Use -mstack-protector-guard-offset & guard-reg gcc options: -mstack-protector-guard=tls -mstack-protector-guard-reg=tp -mstack-protector-guard-offset=xxx GCC's implementation has been merged: commit c931e8d5a96463427040b0d11f9c4352ac22b2b0 Author: Cooper Qu <cooper.qu@linux.alibaba.com> Date: Mon Jul 13 16:15:08 2020 +0800 RISC-V: Add support for TLS stack protector canary access In the end, these codes are inserted by gcc before return: * 0xffffffe00020b396 <+120>: ld a5,1008(tp) # 0x3f0 * 0xffffffe00020b39a <+124>: xor a5,a5,a4 * 0xffffffe00020b39c <+126>: mv a0,s5 * 0xffffffe00020b39e <+128>: bnez a5,0xffffffe00020b61c <_do_fork+766> 0xffffffe00020b3a2 <+132>: ld ra,136(sp) 0xffffffe00020b3a4 <+134>: ld s0,128(sp) 0xffffffe00020b3a6 <+136>: ld s1,120(sp) 0xffffffe00020b3a8 <+138>: ld s2,112(sp) 0xffffffe00020b3aa <+140>: ld s3,104(sp) 0xffffffe00020b3ac <+142>: ld s4,96(sp) 0xffffffe00020b3ae <+144>: ld s5,88(sp) 0xffffffe00020b3b0 <+146>: ld s6,80(sp) 0xffffffe00020b3b2 <+148>: ld s7,72(sp) 0xffffffe00020b3b4 <+150>: addi sp,sp,144 0xffffffe00020b3b6 <+152>: ret ... * 0xffffffe00020b61c <+766>: auipc ra,0x7f8 * 0xffffffe00020b620 <+770>: jalr -1764(ra) # 0xffffffe000a02f38 <__stack_chk_fail> Signed-off-by: Guo Ren <guoren@linux.alibaba.com> Signed-off-by: Cooper Qu <cooper.qu@linux.alibaba.com> Reviewed-by: Kees Cook <keescook@chromium.org> Signed-off-by: Palmer Dabbelt <palmerdabbelt@google.com>
* riscv: Using PATCHABLE_FUNCTION_ENTRY instead of MCOUNTGuo Ren2021-01-141-0/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This patch changes the current detour mechanism of dynamic ftrace which has been discussed during LPC 2020 RISCV-MC [1]. Before the patch, we used mcount for detour: <funca>: addi sp,sp,-16 sd ra,8(sp) sd s0,0(sp) addi s0,sp,16 mv a5,ra mv a0,a5 auipc ra,0x0 -> nop jalr -296(ra) <_mcount@plt> ->nop ... After the patch, we use nop call site area for detour: <funca>: nop -> REG_S ra, -SZREG(sp) nop -> auipc ra, 0x? nop -> jalr ?(ra) nop -> REG_L ra, -SZREG(sp) ... The mcount mechanism is mixed with gcc function prologue which is not very clear. The patchable function entry just put 16 bytes nop before the front of the function prologue which could be filled with a separated detour mechanism. [1] https://www.linuxplumbersconf.org/event/7/contributions/807/ Signed-off-by: Guo Ren <guoren@linux.alibaba.com> Signed-off-by: Palmer Dabbelt <palmerdabbelt@google.com>
* riscv: Use vendor name for K210 SoC supportDamien Le Moal2021-01-141-1/+1
| | | | | | | | | | Rename configuration options and directories related to the Kendryte K210 SoC to use the SoC vendor name (canaan) instead of the "kendryte" branding name. Signed-off-by: Damien Le Moal <damien.lemoal@wdc.com> Reviewed-by: Anup Patel <anup@brainfault.org> Signed-off-by: Palmer Dabbelt <palmerdabbelt@google.com>
* riscv: Clean up boot dirKefeng Wang2020-11-091-0/+3
| | | | | | | | Let's remove all files under riscv boot dir by using archclean rule. Signed-off-by: Kefeng Wang <wangkefeng.wang@huawei.com> Reviewed-by: Atish Patra <atish.patra@wdc.com> Signed-off-by: Palmer Dabbelt <palmerdabbelt@google.com>
* riscv: Fix compressed Image formats buildKefeng Wang2020-11-091-0/+3
| | | | | | | | | | make[1]: *** No rule to make target `Image.lzma'. Stop. When make ARCH=riscv Image.lzma, it won't work, let's fix it. Reviewed-by: Atish Patra <atish.patra@wdc.com> Signed-off-by: Kefeng Wang <wangkefeng.wang@huawei.com> Signed-off-by: Palmer Dabbelt <palmerdabbelt@google.com>
* Merge tag 'kbuild-v5.10' of ↵Linus Torvalds2020-10-221-3/+0
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild Pull Kbuild updates from Masahiro Yamada: - Support 'make compile_commands.json' to generate the compilation database more easily, avoiding stale entries - Support 'make clang-analyzer' and 'make clang-tidy' for static checks using clang-tidy - Preprocess scripts/modules.lds.S to allow CONFIG options in the module linker script - Drop cc-option tests from compiler flags supported by our minimal GCC/Clang versions - Use always 12-digits commit hash for CONFIG_LOCALVERSION_AUTO=y - Use sha1 build id for both BFD linker and LLD - Improve deb-pkg for reproducible builds and rootless builds - Remove stale, useless scripts/namespace.pl - Turn -Wreturn-type warning into error - Fix build error of deb-pkg when CONFIG_MODULES=n - Replace 'hostname' command with more portable 'uname -n' - Various Makefile cleanups * tag 'kbuild-v5.10' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild: (34 commits) kbuild: Use uname for LINUX_COMPILE_HOST detection kbuild: Only add -fno-var-tracking-assignments for old GCC versions kbuild: remove leftover comment for filechk utility treewide: remove DISABLE_LTO kbuild: deb-pkg: clean up package name variables kbuild: deb-pkg: do not build linux-headers package if CONFIG_MODULES=n kbuild: enforce -Werror=return-type scripts: remove namespace.pl builddeb: Add support for all required debian/rules targets builddeb: Enable rootless builds builddeb: Pass -n to gzip for reproducible packages kbuild: split the build log of kallsyms kbuild: explicitly specify the build id style scripts/setlocalversion: make git describe output more reliable kbuild: remove cc-option test of -Werror=date-time kbuild: remove cc-option test of -fno-stack-check kbuild: remove cc-option test of -fno-strict-overflow kbuild: move CFLAGS_{KASAN,UBSAN,KCSAN} exports to relevant Makefiles kbuild: remove redundant CONFIG_KASAN check from scripts/Makefile.kasan kbuild: do not create built-in objects for external module builds ...
| * kbuild: preprocess module linker scriptMasahiro Yamada2020-09-251-3/+0
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | There was a request to preprocess the module linker script like we do for the vmlinux one. (https://lkml.org/lkml/2020/8/21/512) The difference between vmlinux.lds and module.lds is that the latter is needed for external module builds, thus must be cleaned up by 'make mrproper' instead of 'make clean'. Also, it must be created by 'make modules_prepare'. You cannot put it in arch/$(SRCARCH)/kernel/, which is cleaned up by 'make clean'. I moved arch/$(SRCARCH)/kernel/module.lds to arch/$(SRCARCH)/include/asm/module.lds.h, which is included from scripts/module.lds.S. scripts/module.lds is fine because 'make clean' keeps all the build artifacts under scripts/. You can add arch-specific sections in <asm/module.lds.h>. Signed-off-by: Masahiro Yamada <masahiroy@kernel.org> Tested-by: Jessica Yu <jeyu@kernel.org> Acked-by: Will Deacon <will@kernel.org> Acked-by: Geert Uytterhoeven <geert@linux-m68k.org> Acked-by: Palmer Dabbelt <palmerdabbelt@google.com> Reviewed-by: Kees Cook <keescook@chromium.org> Acked-by: Jessica Yu <jeyu@kernel.org>
* | RISC-V: Add EFI stub support.Atish Patra2020-10-021-0/+1
|/ | | | | | | | | | | | | | | Add a RISC-V architecture specific stub code that actually copies the actual kernel image to a valid address and jump to it after boot services are terminated. Enable UEFI related kernel configs as well for RISC-V. Signed-off-by: Atish Patra <atish.patra@wdc.com> Link: https://lore.kernel.org/r/20200421033336.9663-4-atish.patra@wdc.com [ardb: - move hartid fetch into check_platform_features() - use image_size not reserve_size - select ISA_C - do not use dram_base] Signed-off-by: Ard Biesheuvel <ardb@kernel.org> Signed-off-by: Palmer Dabbelt <palmerdabbelt@google.com>
* Merge tag 'riscv-for-linus-5.7' of ↵Linus Torvalds2020-04-091-3/+3
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/riscv/linux Pull RISC-V updates from Palmer Dabbelt: "This contains a handful of new features: - Partial support for the Kendryte K210. There are still a few outstanding issues that I have patches for, but I don't actually have a board to test them so they're not included yet. - SBI v0.2 support. - Fixes to support for building with LLVM-based toolchains. The resulting images are known not to boot yet. I don't anticipate a part two, but I'll probably have something early in the RCs to finish up the K210 support" * tag 'riscv-for-linus-5.7' of git://git.kernel.org/pub/scm/linux/kernel/git/riscv/linux: (38 commits) riscv: create a loader.bin boot image for Kendryte SoC riscv: Kendryte K210 default config riscv: Add Kendryte K210 device tree riscv: Select required drivers for Kendryte SOC riscv: Add Kendryte K210 SoC support riscv: Add SOC early init support riscv: Unaligned load/store handling for M_MODE RISC-V: Support cpu hotplug RISC-V: Add supported for ordered booting method using HSM RISC-V: Add SBI HSM extension definitions RISC-V: Export SBI error to linux error mapping function RISC-V: Add cpu_ops and modify default booting method RISC-V: Move relocate and few other functions out of __init RISC-V: Implement new SBI v0.2 extensions RISC-V: Introduce a new config for SBI v0.1 RISC-V: Add SBI v0.2 extension definitions RISC-V: Add basic support for SBI v0.2 RISC-V: Mark existing SBI as 0.1 SBI. riscv: Use macro definition instead of magic number riscv: Add support to dump the kernel page tables ...
| * riscv: create a loader.bin boot image for Kendryte SoCChristoph Hellwig2020-04-031-3/+3
| | | | | | | | | | | | | | | | | | | | | | | | | | Create the loader.bin bootable image file that can be loaded into Kendryte K210 based boards using the kflash.py tool with the command: kflash.py/kflash.py -t arch/riscv/boot/loader.bin Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Damien Le Moal <damien.lemoal@wdc.com> Reviewed-by: Anup Patel <anup@brainfault.org> Reviewed-by: Palmer Dabbelt <palmerdabbelt@google.com> Signed-off-by: Palmer Dabbelt <palmerdabbelt@google.com>
* | riscv: Change code model of module to medany to improve data accessingVincent Chen2020-03-031-2/+4
|/ | | | | | | | | | All the loaded module locates in the region [＆_end-2G，VMALLOC_END] at runtime, so the distance from the module start to the end of the kernel image does not exceed 2GB. Hence, the code model of the kernel module can be changed to medany to improve the performance data access. Signed-off-by: Vincent Chen <vincent.chen@sifive.com> Signed-off-by: Palmer Dabbelt <palmerdabbelt@google.com>
* riscv: provide a flat image loaderChristoph Hellwig2019-11-171-4/+9
| | | | | | | | | | | | | This allows just loading the kernel at a pre-set address without qemu going bonkers trying to map the ELF file. Contains a contribution from Aurabindo Jayamohanan to reuse the PAGE_OFFSET definition. Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Anup Patel <anup@brainfault.org> [paul.walmsley@sifive.com: fixed checkpatch issue; minor commit message fix] Signed-off-by: Paul Walmsley <paul.walmsley@sifive.com>
* Merge tag 'kbuild-v5.4' of ↵Linus Torvalds2019-09-201-1/+1
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild Pull Kbuild updates from Masahiro Yamada: - add modpost warn exported symbols marked as 'static' because 'static' and EXPORT_SYMBOL is an odd combination - break the build early if gold linker is used - optimize the Bison rule to produce .c and .h files by a single pattern rule - handle PREEMPT_RT in the module vermagic and UTS_VERSION - warn CONFIG options leaked to the user-space except existing ones - make single targets work properly - rebuild modules when module linker scripts are updated - split the module final link stage into scripts/Makefile.modfinal - fix the missed error code in merge_config.sh - improve the error message displayed on the attempt of the O= build in unclean source tree - remove 'clean-dirs' syntax - disable -Wimplicit-fallthrough warning for Clang - add CONFIG_CC_OPTIMIZE_FOR_SIZE_O3 for ARC - remove ARCH_{CPP,A,C}FLAGS variables - add $(BASH) to run bash scripts - change *CFLAGS_<basetarget>.o to take the relative path to $(obj) instead of the basename - stop suppressing Clang's -Wunused-function warnings when W=1 - fix linux/export.h to avoid genksyms calculating CRC of trimmed exported symbols - misc cleanups * tag 'kbuild-v5.4' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild: (63 commits) genksyms: convert to SPDX License Identifier for lex.l and parse.y modpost: use __section in the output to *.mod.c modpost: use MODULE_INFO() for __module_depends export.h, genksyms: do not make genksyms calculate CRC of trimmed symbols export.h: remove defined(__KERNEL__), which is no longer needed kbuild: allow Clang to find unused static inline functions for W=1 build kbuild: rename KBUILD_ENABLE_EXTRA_GCC_CHECKS to KBUILD_EXTRA_WARN kbuild: refactor scripts/Makefile.extrawarn merge_config.sh: ignore unwanted grep errors kbuild: change *FLAGS_<basetarget>.o to take the path relative to $(obj) modpost: add NOFAIL to strndup modpost: add guid_t type definition kbuild: add $(BASH) to run scripts with bash-extension kbuild: remove ARCH_{CPP,A,C}FLAGS kbuild,arc: add CONFIG_CC_OPTIMIZE_FOR_PERFORMANCE_O3 for ARC kbuild: Do not enable -Wimplicit-fallthrough for clang for now kbuild: clean up subdir-ymn calculation in Makefile.clean kbuild: remove unneeded '+' marker from cmd_clean kbuild: remove clean-dirs syntax kbuild: check clean srctree even earlier ...
| * kbuild: rebuild modules when module linker scripts are updatedMasahiro Yamada2019-08-211-1/+1
| | | | | | | | | | | | | | Currently, the timestamp of module linker scripts are not checked. Add them to the dependency of modules so they are correctly rebuilt. Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
* | riscv: Add perf callchain supportMao Han2019-09-041-0/+3
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This patch add support for perf callchain sampling on riscv platforms. The return address of leaf function is retrieved from pt_regs as it is not saved in the outmost frame. Signed-off-by: Mao Han <han_mao@c-sky.com> Cc: Paul Walmsley <paul.walmsley@sifive.com> Cc: Greentime Hu <green.hu@gmail.com> Cc: Palmer Dabbelt <palmer@sifive.com> Cc: linux-riscv <linux-riscv@lists.infradead.org> Cc: Christoph Hellwig <hch@lst.de> Cc: Guo Ren <guoren@kernel.org> Tested-by: Greentime Hu <greentime.hu@sifive.com> [paul.walmsley@sifive.com: fixed some 'checkpatch.pl --strict' issues; fixed patch description spelling] Signed-off-by: Paul Walmsley <paul.walmsley@sifive.com>
* | riscv: add arch/riscv/KbuildMasahiro Yamada2019-08-301-1/+1
|/ | | | | | | Use the standard obj-y form to specify the sub-directories under arch/riscv/. No functional change intended. Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com> Signed-off-by: Paul Walmsley <paul.walmsley@sifive.com>
* riscv: drop unneeded -Wall additionMasahiro Yamada2019-07-171-2/+0
| | | | | | | | | | The top level Makefile adds -Wall globally: KBUILD_CFLAGS := -Wall -Wundef -Werror=strict-prototypes -Wno-trigraphs \ For riscv, I see two "-Wall" added for compiling each object. Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
* kconfig: make arch/*/configs/defconfig the default of KBUILD_DEFCONFIGMasahiro Yamada2019-06-091-2/+0
| | | | | | | | | | | | | | | | | | | Until recently, if KBUILD_DEFCONFIG was not set by the arch Makefile, the default path arch/*/defconfig was used. The last users of the default are gone by the following commits: - Commit f3e20ad67b4c ("s390: move arch/s390/defconfig to arch/s390/configs/defconfig") - Commit 986a13769c4b ("alpha: move arch/alpha/defconfig to arch/alpha/configs/defconfig") Let's set arch/*/configs/defconfig as a new default. This saves KBUILD_DEFCONFIG for some architectures. Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com> Acked-by: Catalin Marinas <catalin.marinas@arm.com>
* riscv: remove CONFIG_RISCV_ISA_AChristoph Hellwig2019-04-251-3/+2
| | | | | | | | | This option is always enabled, and not supporting the A extensions would create a complete ABI trainwreck, so there is no point in even slightly encouraging such an idea by keeping this unselectable code around. Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Palmer Dabbelt <palmer@sifive.com>
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