Re: [PATCH 5/7] riscv: Add Kconfig option for SBI v0.2

On Wed, Apr 8, 2020 at 6:42 AM Bin Meng bmeng.cn@gmail.com wrote:

SBI v0.2 is more scalable and extendable to handle future needs for RISC-V supervisor interfaces. For example, with SBI v0.2 HSM extension, only a single hart need to boot and enter operating system. The booting hart can bring up secondary harts one by one afterwards.

Signed-off-by: Bin Meng bmeng.cn@gmail.com

arch/riscv/Kconfig | 20 +++++++++++++++++++- 1 file changed, 19 insertions(+), 1 deletion(-)

diff --git a/arch/riscv/Kconfig b/arch/riscv/Kconfig index 502143f..ae801d3 100644 --- a/arch/riscv/Kconfig +++ b/arch/riscv/Kconfig @@ -226,14 +226,32 @@ config SBI bool default y if RISCV_SMODE || SPL_RISCV_SMODE

+choice

•   prompt "SBI support"
  

•   default SBI_V01
  

config SBI_V01 bool "SBI v0.1 support"

•   default y
    depends on SBI
    help
      This config allows kernel to use SBI v0.1 APIs. This will be
      deprecated in future once legacy M-mode software are no longer in use.
  
  

+config SBI_V02

•   bool "SBI v0.2 support"
  

•   depends on SBI
  

•   help
  

•     This config allows kernel to use SBI v0.2 APIs. SBI v0.2 is more
  

•     scalable and extendable to handle future needs for RISC-V supervisor
  

•     interfaces. For example, with SBI v0.2 HSM extension, only a single
  

•     hart need to boot and enter operating system. The booting hart can
  

•     bring up secondary harts one by one afterwards.
  

•     Choose this option if OpenSBI v0.7 or above release is used together
  

•     with U-Boot.
  

+endchoice

config SBI_IPI bool depends on SBI -- 2.7.4

Reviewed-by: Atish Patra atish.patra@wdc.com