On Wed, Sep 7, 2022 at 1:42 AM <Conor.Dooley@xxxxxxxxxxxxx> wrote: > > On 06/09/2022 04:54, guoren@xxxxxxxxxx wrote: > > From: Guo Ren <guoren@xxxxxxxxxxxxxxxxx> > > > > The patches convert riscv to use the generic entry infrastructure from > > kernel/entry/*. Add independent irq stacks (IRQ_STACKS) for percpu to > > prevent kernel stack overflows. Add the HAVE_SOFTIRQ_ON_OWN_STACK > > feature for the IRQ_STACKS config. You can try it directly with [1]. > > Hey Guo Ren, > I applied this patchset to v6.0-rc4 & ran into a build error: > /stuff/linux/arch/riscv/kernel/entry.S:347:9: error: operand must be a bare symbol name > la a3, ((1 << (12)) << (2 + 0)) Yes, please try: - la a3, IRQ_STACK_SIZE + li a3, IRQ_STACK_SIZE la is for the symbol, not immediate. But why does my toolchain not report the error? ➜ linux git:(generic_entry_v3) make ARCH=riscv CROSS_COMPILE=riscv64-unknown-linux-gnu- EXTRA_CFLAGS+=-g O=../build-riscv/ -kj62 all -kj ➜ linux git:(generic_entry_v3) riscv64-unknown-linux-gnu-gcc -v Using built-in specs. COLLECT_GCC=riscv64-unknown-linux-gnu-gcc COLLECT_LTO_WRAPPER=/opt/riscv/libexec/gcc/riscv64-unknown-linux-gnu/11.1.0/lto-wrapper Target: riscv64-unknown-linux-gnu Configured with: /home/guoren/source/riscv-gnu-toolchain/riscv-gcc/configure --target=riscv64-unknown-linux-gnu --prefix=/opt/riscv --with-sysroot=/opt/riscv/sysroot --with-pkgversion=g5964b5cd7272 --with-system-zlib --enable-shared --enable-tls --enable-languages=c,c++,fortran --disable-libmudflap --disable-libssp --disable-libquadmath --disable-libsanitizer --disable-nls --disable-bootstrap --src=.././riscv-gcc --enable-multilib --with-abi=lp64d --with-arch=rv64imafdc --with-tune=rocket --with-isa-spec=2.2 'CFLAGS_FOR_TARGET=-O2 -mcmodel=medlow' 'CXXFLAGS_FOR_TARGET=-O2 -mcmodel=medlow' Thread model: posix Supported LTO compression algorithms: zlib gcc version 11.1.0 (g5964b5cd7272) > ^ > CC arch/riscv/kernel/process.o > make[5]: *** [/stuff/linux/scripts/Makefile.build:322: arch/riscv/kernel/entry.o] Error 1 > make[5]: *** Waiting for unfinished jobs.... > > Thanks, > Conor. > > > > [1] https://github.com/guoren83/linux/tree/generic_entry_v3 > > > > V3: > > - Fixup CONFIG_COMPAT=n compile error > > - Add THREAD_SIZE_ORDER config > > - Optimize elf_kexec.c warning fixup > > - Add static to irq_stack_ptr definition > > > > V2: > > Link: https://lore.kernel.org/linux-riscv/20220904072637.8619-1-guoren@xxxxxxxxxx/ > > - Fixup compile error by include "riscv: ptrace: Remove duplicate > > operation" > > - Fixup compile warning > > Reported-by: kernel test robot <lkp@xxxxxxxxx> > > - Add test repo link in cover letter > > > > V1: > > Link: https://lore.kernel.org/linux-riscv/20220903163808.1954131-1-guoren@xxxxxxxxxx/ > > > > Guo Ren (7): > > riscv: elf_kexec: Fixup compile warning > > riscv: compat_syscall_table: Fixup compile warning > > riscv: ptrace: Remove duplicate operation > > riscv: convert to generic entry > > riscv: Support HAVE_IRQ_EXIT_ON_IRQ_STACK > > riscv: Support HAVE_SOFTIRQ_ON_OWN_STACK > > riscv: Add config of thread stack size > > > > arch/riscv/Kconfig | 19 ++ > > arch/riscv/include/asm/csr.h | 1 - > > arch/riscv/include/asm/entry-common.h | 8 + > > arch/riscv/include/asm/irq.h | 3 + > > arch/riscv/include/asm/ptrace.h | 10 +- > > arch/riscv/include/asm/stacktrace.h | 5 + > > arch/riscv/include/asm/syscall.h | 6 + > > arch/riscv/include/asm/thread_info.h | 19 +- > > arch/riscv/include/asm/vmap_stack.h | 28 +++ > > arch/riscv/kernel/Makefile | 1 + > > arch/riscv/kernel/elf_kexec.c | 2 +- > > arch/riscv/kernel/entry.S | 255 +++++--------------------- > > arch/riscv/kernel/irq.c | 75 ++++++++ > > arch/riscv/kernel/ptrace.c | 41 ----- > > arch/riscv/kernel/signal.c | 21 +-- > > arch/riscv/kernel/sys_riscv.c | 27 +++ > > arch/riscv/kernel/traps.c | 11 ++ > > arch/riscv/mm/fault.c | 12 +- > > 18 files changed, 259 insertions(+), 285 deletions(-) > > create mode 100644 arch/riscv/include/asm/entry-common.h > > create mode 100644 arch/riscv/include/asm/vmap_stack.h > > -- Best Regards Guo Ren
