diff options
| author | Greentime Hu <greentime.hu@sifive.com> | 2024-01-15 05:59:20 +0000 |
|---|---|---|
| committer | Palmer Dabbelt <palmer@rivosinc.com> | 2024-01-16 07:13:53 -0800 |
| commit | ecd2ada8a5e0b464dab54f71d4ba7bbf5708711f (patch) | |
| tree | 23dd7e28a56871c4286f8dd07bb1bf5dbda14e18 /arch/riscv/include/asm/processor.h | |
| parent | b85ea95d086471afb4ad062012a4d73cd328fa86 (diff) | |
riscv: Add support for kernel mode vector
Add kernel_vector_begin() and kernel_vector_end() function declarations
and corresponding definitions in kernel_mode_vector.c
These are needed to wrap uses of vector in kernel mode.
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>
Signed-off-by: Andy Chiu <andy.chiu@sifive.com>
Reviewed-by: Eric Biggers <ebiggers@google.com>
Tested-by: Björn Töpel <bjorn@rivosinc.com>
Tested-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
Link: https://lore.kernel.org/r/20240115055929.4736-2-andy.chiu@sifive.com
Signed-off-by: Palmer Dabbelt <palmer@rivosinc.com>
Diffstat (limited to 'arch/riscv/include/asm/processor.h')
| -rw-r--r-- | arch/riscv/include/asm/processor.h | 12 |
1 files changed, 11 insertions, 1 deletions
diff --git a/arch/riscv/include/asm/processor.h b/arch/riscv/include/asm/processor.h index f19f861cda54..4809f20a2053 100644 --- a/arch/riscv/include/asm/processor.h +++ b/arch/riscv/include/asm/processor.h @@ -73,6 +73,15 @@ struct task_struct; struct pt_regs; +/* + * We use a flag to track in-kernel Vector context. Currently the flag has the + * following meaning: + * + * - bit 0: indicates whether the in-kernel Vector context is active. The + * activation of this state disables the preemption. + */ +#define RISCV_KERNEL_MODE_V 0x1 + /* CPU-specific state of a task */ struct thread_struct { /* Callee-saved registers */ @@ -81,7 +90,8 @@ struct thread_struct { unsigned long s[12]; /* s[0]: frame pointer */ struct __riscv_d_ext_state fstate; unsigned long bad_cause; - unsigned long vstate_ctrl; + u32 riscv_v_flags; + u32 vstate_ctrl; struct __riscv_v_ext_state vstate; unsigned long align_ctl; }; |