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lib: sbi: add support for firmware features extension

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This extension allows the software running in supervisor mode to control
the behavior of various features of the SBI [1]. Implement the support
for such extension.

Link: https://lists.riscv.org/g/tech-prs/message/924 [1]
Signed-off-by: Clément Léger <cleger@rivosinc.com>
Reviewed-by: Anup Patel <anup@brainfault.org>
This commit is contained in:
Clément Léger
2024-06-19 11:42:39 +02:00
committed by Anup Patel
parent 53844c98d0
commit aa5a859369
5 changed files with 240 additions and 0 deletions
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11
lib/sbi/sbi_init.c
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@@ -14,6 +14,7 @@
#include <sbi/sbi_cppc.h>
#include <sbi/sbi_domain.h>
#include <sbi/sbi_ecall.h>
#include <sbi/sbi_fwft.h>
#include <sbi/sbi_hart.h>
#include <sbi/sbi_hartmask.h>
#include <sbi/sbi_heap.h>
@@ -308,6 +309,12 @@ static void __noreturn init_coldboot(struct sbi_scratch *scratch, u32 hartid)
sbi_hart_hang();
}
rc = sbi_fwft_init(scratch, true);
if (rc) {
sbi_printf("%s: fwft init failed (error %d)\n", __func__, rc);
sbi_hart_hang();
}
/*
* Note: Finalize domains after HSM initialization so that we
* can startup non-root domains.
@@ -423,6 +430,10 @@ static void __noreturn init_warm_startup(struct sbi_scratch *scratch,
if (rc)
sbi_hart_hang();
rc = sbi_fwft_init(scratch, false);
if (rc)
sbi_hart_hang();
rc = sbi_platform_final_init(plat, false);
if (rc)
sbi_hart_hang();