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lib: sbi: Add support for smcntrpmf

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This adds the support for ISA extension smcntrpmf. When some inhibit flags
are set by a lower privilege mode for new CSRs added by smcntrpmf, OpenSBI
sets the appropriate values correspondingly.

Signed-off-by: Kaiwen Xue <kaiwenx@andrew.cmu.edu>
Signed-off-by: Kaiwen Xue <kaiwenx@rivosinc.com>
Reviewed-by: Anup Patel <anup@brainfault.org>
Reviewed-by: Atish Patra <atishp@rivosinc.com>
This commit is contained in:
Kaiwen Xue
2023-07-20 14:07:02 -07:00
committed by Anup Patel
parent 94197a8c49
commit c104c60912
5 changed files with 69 additions and 2 deletions
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11
lib/sbi/sbi_hart.c
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@@ -606,6 +606,9 @@ static inline char *sbi_hart_extension_id2string(int ext)
case SBI_HART_EXT_SMEPMP:
estr = "smepmp";
break;
case SBI_HART_EXT_SMCNTRPMF:
estr = "smcntrpmf";
break;
default:
break;
}
@@ -872,6 +875,14 @@ __pmp_skip:
SBI_HART_EXT_SMSTATEEN, true);
}
/* Detect if hart supports smcntrpmf */
if (hfeatures->priv_version >= SBI_HART_PRIV_VER_1_12) {
csr_read_allowed(CSR_MCYCLECFG, (unsigned long)&trap);
if (!trap.cause)
__sbi_hart_update_extension(hfeatures,
SBI_HART_EXT_SMCNTRPMF, true);
}
/* Let platform populate extensions */
rc = sbi_platform_extensions_init(sbi_platform_thishart_ptr(),
hfeatures);