Messages in this thread Patch in this message | | | From | Greentime Hu <> | Subject | [RFC PATCH v8 08/21] riscv: Add vector struct and assembler definitions | Date | Thu, 9 Sep 2021 01:45:20 +0800 |
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Add vector state context struct in struct thread and asm-offsets.c definitions.
The vector registers will be saved in datap pointer of __riscv_v_state. It will be dynamically allocated in kernel space. It will be put right after the __riscv_v_state data structure in user space.
Co-developed-by: Vincent Chen <vincent.chen@sifive.com> Signed-off-by: Vincent Chen <vincent.chen@sifive.com> Signed-off-by: Greentime Hu <greentime.hu@sifive.com> --- arch/riscv/include/asm/processor.h | 1 + arch/riscv/include/uapi/asm/ptrace.h | 11 +++++++++++ arch/riscv/kernel/asm-offsets.c | 6 ++++++ 3 files changed, 18 insertions(+)
diff --git a/arch/riscv/include/asm/processor.h b/arch/riscv/include/asm/processor.h index 021ed64ee608..1b037c69d311 100644 --- a/arch/riscv/include/asm/processor.h +++ b/arch/riscv/include/asm/processor.h @@ -35,6 +35,7 @@ struct thread_struct { unsigned long s[12]; /* s[0]: frame pointer */ struct __riscv_d_ext_state fstate; unsigned long bad_cause; + struct __riscv_v_state vstate; }; #define INIT_THREAD { \ diff --git a/arch/riscv/include/uapi/asm/ptrace.h b/arch/riscv/include/uapi/asm/ptrace.h index 882547f6bd5c..bd3b8a710246 100644 --- a/arch/riscv/include/uapi/asm/ptrace.h +++ b/arch/riscv/include/uapi/asm/ptrace.h @@ -77,6 +77,17 @@ union __riscv_fp_state { struct __riscv_q_ext_state q; }; +struct __riscv_v_state { + unsigned long vstart; + unsigned long vl; + unsigned long vtype; + unsigned long vcsr; + void *datap; +#if __riscv_xlen == 32 + __u32 __padding; +#endif +}; + #endif /* __ASSEMBLY__ */ #endif /* _UAPI_ASM_RISCV_PTRACE_H */ diff --git a/arch/riscv/kernel/asm-offsets.c b/arch/riscv/kernel/asm-offsets.c index 90f8ce64fa6f..34f43c84723a 100644 --- a/arch/riscv/kernel/asm-offsets.c +++ b/arch/riscv/kernel/asm-offsets.c @@ -72,6 +72,12 @@ void asm_offsets(void) OFFSET(TSK_STACK_CANARY, task_struct, stack_canary); #endif + OFFSET(RISCV_V_STATE_VSTART, __riscv_v_state, vstart); + OFFSET(RISCV_V_STATE_VL, __riscv_v_state, vl); + OFFSET(RISCV_V_STATE_VTYPE, __riscv_v_state, vtype); + OFFSET(RISCV_V_STATE_VCSR, __riscv_v_state, vcsr); + OFFSET(RISCV_V_STATE_DATAP, __riscv_v_state, datap); + DEFINE(PT_SIZE, sizeof(struct pt_regs)); OFFSET(PT_EPC, pt_regs, epc); OFFSET(PT_RA, pt_regs, ra); -- 2.31.1
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