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Date: Wed, 7 Dec 2022 21:58:06 -0500
From: guoren@...nel.org
To: arnd@...db.de, guoren@...nel.org, palmer@...osinc.com,
tglx@...utronix.de, peterz@...radead.org, luto@...nel.org,
conor.dooley@...rochip.com, heiko@...ech.de, jszhang@...nel.org,
lazyparser@...il.com, falcon@...ylab.org, chenhuacai@...nel.org,
apatel@...tanamicro.com, atishp@...shpatra.org, palmer@...belt.com,
paul.walmsley@...ive.com, mark.rutland@....com,
zouyipeng@...wei.com, bigeasy@...utronix.de,
David.Laight@...lab.com, chenzhongjin@...wei.com,
greentime.hu@...ive.com, andy.chiu@...ive.com, ben@...adent.org.uk,
bjorn@...nel.org
Cc: linux-arch@...r.kernel.org, linux-kernel@...r.kernel.org,
linux-riscv@...ts.infradead.org, Guo Ren <guoren@...ux.alibaba.com>
Subject: [PATCH -next V10 00/10] riscv: Add GENERIC_ENTRY support and related features
From: Guo Ren <guoren@...ux.alibaba.com>
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.
The 1,2 are the preparation of generic entry. 3~7 are the main part
of generic entry. 8~10 are separate-irq-stack optimizations based on
generic entry.
All tested with rv64, rv32, rv64 + 32rootfs, all are passed.
You can directly try it with:
[1] https://github.com/guoren83/linux/tree/generic_entry_v10
Any reviews and tests are helpful.
v10:
- Rebase on palmer/for-next branch (20221208)
- Remove unrelated patches from the series (Suggested-by: Bjorn)
- Fixup Typos.
v9:
https://lore.kernel.org/linux-riscv/20221130034059.826599-1-guoren@kernel.org/
- Fixup NR_syscalls check (by Ben Hutchings)
- Add Tested-by: Jisheng Zhang
v8:
https://lore.kernel.org/linux-riscv/20221103075047.1634923-1-guoren@kernel.org/
- 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@kernel.org/
- 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@kernel.org/
- 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@kernel.org/
- 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@kernel.org/
- 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@kernel.org/
- 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@kernel.org/
- Fixup compile error by include "riscv: ptrace: Remove duplicate
operation"
- Fixup compile warning
Reported-by: kernel test robot <lkp@...el.com>
- Add test repo link in cover letter
V1:
https://lore.kernel.org/linux-riscv/20220903163808.1954131-1-guoren@kernel.org/
Guo Ren (6):
riscv: ptrace: Remove duplicate operation
riscv: entry: Add noinstr to prevent instrumentation inserted
riscv: entry: Convert to generic entry
riscv: stack: Support HAVE_IRQ_EXIT_ON_IRQ_STACK
riscv: stack: Support HAVE_SOFTIRQ_ON_OWN_STACK
riscv: stack: Add config of thread stack size
Jisheng Zhang (3):
riscv: entry: Remove extra level wrappers of trace_hardirqs_{on,off}
riscv: entry: 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 | 20 ++
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 | 2 -
arch/riscv/kernel/entry.S | 325 +++-----------------------
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 | 29 +++
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 +-
include/linux/compiler_types.h | 15 +-
22 files changed, 402 insertions(+), 501 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
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