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riscv: Add Kconfig option for SBI v0.2

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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>
Reviewed-by: Atish Patra <atish.patra@wdc.com>
This commit is contained in:
Bin Meng 2020-04-16 08:09:32 -07:00 committed by Andes
parent 6fa022e8fc
commit ff0fa6c1b3
1 changed files with 19 additions and 1 deletions
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20
arch/riscv/Kconfig
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@ -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