diff options
| author | Sami Tolvanen <samitolvanen@google.com> | 2023-09-27 22:48:03 +0000 |
|---|---|---|
| committer | Palmer Dabbelt <palmer@rivosinc.com> | 2023-10-27 14:43:09 -0700 |
| commit | c40fef858d002fb027033c572ac8bdf8756a2c6b (patch) | |
| tree | 86f759f14b79e2ee70406408bfa50ebafd9a8a92 /arch/riscv/include | |
| parent | d1584d791a297aa8ed93503382a682a6ecfc4218 (diff) | |
riscv: Use separate IRQ shadow call stacks
When both CONFIG_IRQ_STACKS and SCS are enabled, also use a separate
per-CPU shadow call stack.
Signed-off-by: Sami Tolvanen <samitolvanen@google.com>
Tested-by: Nathan Chancellor <nathan@kernel.org>
Link: https://lore.kernel.org/r/20230927224757.1154247-13-samitolvanen@google.com
Signed-off-by: Palmer Dabbelt <palmer@rivosinc.com>
Diffstat (limited to 'arch/riscv/include')
| -rw-r--r-- | arch/riscv/include/asm/scs.h | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/arch/riscv/include/asm/scs.h b/arch/riscv/include/asm/scs.h index 94726ea773e3..0e45db78b24b 100644 --- a/arch/riscv/include/asm/scs.h +++ b/arch/riscv/include/asm/scs.h @@ -13,6 +13,11 @@ XIP_FIXUP_OFFSET gp .endm +/* Load the per-CPU IRQ shadow call stack to gp. */ +.macro scs_load_irq_stack tmp + load_per_cpu gp, irq_shadow_call_stack_ptr, \tmp +.endm + /* Load task_scs_sp(current) to gp. */ .macro scs_load_current REG_L gp, TASK_TI_SCS_SP(tp) @@ -34,6 +39,8 @@ _skip_scs: .macro scs_load_init_stack .endm +.macro scs_load_irq_stack tmp +.endm .macro scs_load_current .endm .macro scs_load_current_if_task_changed prev |