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lib: sbi: Detect and print privileged spec version

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It is possible to guess privileged spec versions based on the CSRs
that where introduced in different privileged spec versions. In
future, if we are not able guess privileged spec version then we
can have platform provide it.

We add privileged spec version as per-hart feature and try to guess
it based on presence of mcounteren, mcountinhibit, and menvcfg CSRs.

Signed-off-by: Anup Patel <apatel@ventanamicro.com>
Reviewed-by: Atish Patra <atishp@rivosinc.com>
This commit is contained in:
Anup Patel
2022-04-28 17:30:02 +05:30
committed by Anup Patel
parent b0c9df514b
commit 1a754bb365
3 changed files with 63 additions and 6 deletions
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lib/sbi/sbi_init.c
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@@ -139,6 +139,8 @@ static void sbi_boot_print_hart(struct sbi_scratch *scratch, u32 hartid)
/* Boot HART details */
sbi_printf("Boot HART ID : %u\n", hartid);
sbi_printf("Boot HART Domain : %s\n", dom->name);
sbi_hart_get_priv_version_str(scratch, str, sizeof(str));
sbi_printf("Boot HART Priv Version : %s\n", str);
misa_string(xlen, str, sizeof(str));
sbi_printf("Boot HART ISA : %s\n", str);
sbi_hart_get_features_str(scratch, str, sizeof(str));