Michael Brown 19f44d2998 [riscv] Check if seed CSR is accessible from S-mode ...

The seed CSR defined by the Zkr extension is accessible only in M-mode
by default.  Older versions of OpenSBI (prior to version 1.4) do not
set mseccfg.sseed, with the result that attempts to access the seed
CSR from S-mode will raise an illegal instruction exception.

Add a facility for testing the accessibility of arbitrary CSRs, and
use it to check that the seed CSR is accessible before reporting the
seed CSR entropy source as being functional.

Signed-off-by: Michael Brown <mcb30@ipxe.org>

2024-10-28 23:07:14 +00:00

..

arm

[efi] Centralise definition of efi_cpu_nap()

2024-09-13 14:38:23 +01:00

arm32

[crypto] Use architecture-independent bigint_is_set()

2024-10-10 15:35:16 +01:00

arm64

[crypto] Use architecture-independent bigint_is_set()

2024-10-10 15:35:16 +01:00

i386

[profile] Standardise return type of profile_timestamp()

2024-09-24 15:40:45 +01:00

loong64

[crypto] Use architecture-independent bigint_is_set()

2024-10-10 15:35:16 +01:00

riscv

[riscv] Check if seed CSR is accessible from S-mode

2024-10-28 23:07:14 +00:00

riscv32

[sbi] Add support for running as a RISC-V SBI payload

2024-10-28 19:20:50 +00:00

riscv64

[sbi] Add support for running as a RISC-V SBI payload

2024-10-28 19:20:50 +00:00

x86

[crypto] Use architecture-independent bigint_is_set()

2024-10-10 15:35:16 +01:00

x86_64

[profile] Standardise return type of profile_timestamp()

2024-09-24 15:40:45 +01:00