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lib: sbi_domain: allow specifying inaccessible region

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According to the RISC‑V Privileged Specification, SmePMP
regions that grant no access in any privilege mode are
valid. Allow such regions to be specified.

Signed-off-by: Yu-Chien Peter Lin <peter.lin@sifive.com>
Reviewed-by: Anup Patel <anup@brainfault.org>
Link: https://lore.kernel.org/r/20251008084444.3525615-3-peter.lin@sifive.com
Signed-off-by: Anup Patel <anup@brainfault.org>
This commit is contained in:
Yu-Chien Peter Lin
2025-10-08 16:44:38 +08:00
committed by Anup Patel
parent 32c1d38dcf
commit 667eed2266
2 changed files with 11 additions and 5 deletions
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4
lib/sbi/sbi_hart.c
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@@ -358,8 +358,6 @@ static int sbi_hart_smepmp_configure(struct sbi_scratch *scratch,
}
pmp_flags = sbi_domain_get_smepmp_flags(reg);
if (!pmp_flags)
return 0;
sbi_hart_smepmp_set(scratch, dom, reg, pmp_idx++, pmp_flags,
pmp_log2gran, pmp_addr_max);
@@ -384,8 +382,6 @@ static int sbi_hart_smepmp_configure(struct sbi_scratch *scratch,
}
pmp_flags = sbi_domain_get_smepmp_flags(reg);
if (!pmp_flags)
return 0;
sbi_hart_smepmp_set(scratch, dom, reg, pmp_idx++, pmp_flags,
pmp_log2gran, pmp_addr_max);