diff options
| author | Palmer Dabbelt <palmer@rivosinc.com> | 2023-06-22 10:38:39 -0700 |
|---|---|---|
| committer | Palmer Dabbelt <palmer@rivosinc.com> | 2023-06-23 10:06:21 -0700 |
| commit | b5e13f3ace78a8159dbad92bb005090a431e36d7 (patch) | |
| tree | ecf5360b87b4aef89194904804670c12b5e5f56b /arch/riscv/Kconfig | |
| parent | 42b89447b65863904eaf802ee05b55a238eac538 (diff) | |
| parent | a7555f6b62e7f5b3a3b783cc6d4c4dafcb8527c8 (diff) | |
Merge patch series "riscv: Add independent irq/softirq stacks support"
guoren@kernel.org <guoren@kernel.org> says:
From: Guo Ren <guoren@linux.alibaba.com>
This patch series adds independent irq/softirq stacks to decrease the
press of the thread stack. Also, add a thread STACK_SIZE config for
users to adjust the proper size during compile time.
* b4-shazam-merge:
riscv: stack: Add config of thread stack size
riscv: stack: Support HAVE_SOFTIRQ_ON_OWN_STACK
riscv: stack: Support HAVE_IRQ_EXIT_ON_IRQ_STACK
Link: https://lore.kernel.org/r/20230614013018.2168426-1-guoren@kernel.org
Signed-off-by: Palmer Dabbelt <palmer@rivosinc.com>
Diffstat (limited to 'arch/riscv/Kconfig')
| -rw-r--r-- | arch/riscv/Kconfig | 19 |
1 files changed, 19 insertions, 0 deletions
diff --git a/arch/riscv/Kconfig b/arch/riscv/Kconfig index a9e8b697fefb..1d39efe2b940 100644 --- a/arch/riscv/Kconfig +++ b/arch/riscv/Kconfig @@ -591,6 +591,25 @@ config FPU If you don't know what to do here, say Y. +config IRQ_STACKS + bool "Independent irq & softirq stacks" if EXPERT + default y + select HAVE_IRQ_EXIT_ON_IRQ_STACK + select HAVE_SOFTIRQ_ON_OWN_STACK + help + Add independent irq & softirq stacks for percpu to prevent kernel stack + overflows. We may save some memory footprint by disabling IRQ_STACKS. + +config THREAD_SIZE_ORDER + int "Kernel stack size (in power-of-two numbers of page size)" if VMAP_STACK && EXPERT + range 0 4 + default 1 if 32BIT && !KASAN + default 3 if 64BIT && KASAN + default 2 + help + Specify the Pages of thread stack size (from 4KB to 64KB), which also + affects irq stack size, which is equal to thread stack size. + endmenu # "Platform type" menu "Kernel features" |