On Thu, Nov 03, 2022 at 03:50:33AM -0400, guoren@xxxxxxxxxx wrote: > From: Guo Ren <guoren@xxxxxxxxxxxxxxxxx> > > The patches convert riscv to use the generic entry infrastructure from > kernel/entry/*. Additionally, add independent irq stacks (IRQ_STACKS) > for percpu to prevent kernel stack overflows. Add generic_entry based > STACKLEAK support. Some optimization for entry.S with new .macro and > merge ret_from_kernel_thread into ret_from_fork. > > We have tested it with rv64, rv32, rv64 + 32rootfs, all are passed. > > You can directly try it with: > [1] https://github.com/guoren83/linux/tree/generic_entry_v8 > > Any reviews and tests are helpful. Thanks for this series, Tested-by: Jisheng Zhang <jszhang@xxxxxxxxxx> > > v8: > - Rebase on palmer/for-next branch (20221102) > - Add save/restore_from_x5_to_x31 .macro (JishengZhang) > - Consolidate ret_from_kernel_thread into ret_from_fork (JishengZhang) > - Optimize __noinstr_section comment (JiangshanLai) > > v7: > https://lore.kernel.org/linux-riscv/20221015114702.3489989-1-guoren@xxxxxxxxxx/ > - Fixup regs_irqs_disabled with SR_PIE > - Optimize stackleak_erase -> stackleak_erase_on_task_stack (Thx Mark > Rutland) > - Add BUG_ON(!irqs_disabled()) in trap handlers > - Using regs_irqs_disabled in __do_page_fault > - Remove unnecessary irq disable in ret_from_exception and add comment > > v6: > https://lore.kernel.org/linux-riscv/20221002012451.2351127-1-guoren@xxxxxxxxxx/ > - Use THEAD_SIZE_ORDER for thread size adjustment in kconfig (Thx Arnd) > - Move call_on_stack to inline style (Thx Peter Zijlstra) > - Fixup fp chain broken (Thx Chen Zhongjin) > - Remove common entry modification, and fixup page_fault entry (Thx > Peter Zijlstra) > - Treat some traps as nmi entry (Thx Peter Zijlstra) > > v5: > https://lore.kernel.org/linux-riscv/20220918155246.1203293-1-guoren@xxxxxxxxxx/ > - Add riscv own stackleak patch instead of generic entry modification > (by Mark Rutland) > - Add EXPERT dependency for THREAD_SIZE (by Arnd) > - Add EXPERT dependency for IRQ_STACK (by Sebastian, David Laight) > - Corrected __trap_section (by Peter Zijlstra) > - Add Tested-by (Yipeng Zou) > - Use CONFIG_SOFTIRQ_ON_OWN_STACK replace "#ifndef CONFIG_PREEMPT_RT" > - Fixup systrace_enter compile error > - Fixup exit_to_user_mode_prepare preempt_disable warning > > V4: > https://lore.kernel.org/linux-riscv/20220908022506.1275799-1-guoren@xxxxxxxxxx/ > - Fixup entry.S with "la" bug (by Conor.Dooley) > - Fixup missing noinstr bug (by Peter Zijlstra) > > V3: > https://lore.kernel.org/linux-riscv/20220906035423.634617-1-guoren@xxxxxxxxxx/ > - 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: > 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: > https://lore.kernel.org/linux-riscv/20220903163808.1954131-1-guoren@xxxxxxxxxx/ > > > Dao Lu (1): > riscv: Add support for STACKLEAK gcc plugin > > Guo Ren (9): > riscv: elf_kexec: Fixup compile warning > riscv: compat_syscall_table: Fixup compile warning > riscv: ptrace: Remove duplicate operation > riscv: traps: Add noinstr to prevent instrumentation inserted > 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 > riscv: Typo fixup for addi -> andi in comment > > Jisheng Zhang (3): > riscv: remove extra level wrappers of trace_hardirqs_{on,off} > riscv: consolidate ret_from_kernel_thread into ret_from_fork > riscv: entry: consolidate general regs saving/restoring > > Lai Jiangshan (1): > compiler_types.h: Add __noinstr_section() for noinstr > > arch/riscv/Kconfig | 21 ++ > arch/riscv/include/asm/asm.h | 63 +++++ > arch/riscv/include/asm/csr.h | 1 - > arch/riscv/include/asm/entry-common.h | 8 + > 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 | 27 +-- > arch/riscv/include/asm/vmap_stack.h | 28 +++ > arch/riscv/kernel/Makefile | 3 +- > arch/riscv/kernel/elf_kexec.c | 2 +- > arch/riscv/kernel/entry.S | 327 +++----------------------- > arch/riscv/kernel/irq.c | 110 +++++++++ > arch/riscv/kernel/mcount-dyn.S | 56 +---- > arch/riscv/kernel/process.c | 5 +- > arch/riscv/kernel/ptrace.c | 44 ---- > arch/riscv/kernel/signal.c | 21 +- > arch/riscv/kernel/sys_riscv.c | 27 +++ > arch/riscv/kernel/trace_irq.c | 27 --- > arch/riscv/kernel/trace_irq.h | 11 - > arch/riscv/kernel/traps.c | 74 ++++-- > arch/riscv/mm/fault.c | 16 +- > drivers/firmware/efi/libstub/Makefile | 2 +- > include/linux/compiler_types.h | 15 +- > 24 files changed, 407 insertions(+), 502 deletions(-) > create mode 100644 arch/riscv/include/asm/entry-common.h > create mode 100644 arch/riscv/include/asm/vmap_stack.h > delete mode 100644 arch/riscv/kernel/trace_irq.c > delete mode 100644 arch/riscv/kernel/trace_irq.h > > -- > 2.36.1 >
