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lib: sbi_hart_pmp: disable unconfigured PMP entries

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Disable PMP entries not configured in domain. These entries
may contain values configured by the boot loader; disabling it
to be certain PMP configuration is exactly as configured by the
openSBI

Signed-off-by: Vladimir Kondratiev <vladimir.kondratiev@mobileye.com>
Reviewed-by: Anup Patel <anup@brainfault.org>
Link: https://lore.kernel.org/r/20260223-for-upstream-eyeq7h-v3-2-621d004d1a21@mobileye.com
Signed-off-by: Anup Patel <anup@brainfault.org>
This commit is contained in:
Vladimir Kondratiev
2026-02-23 16:54:41 +02:00
committed by Anup Patel
parent e58d528702
commit ea45923765
1 changed files with 6 additions and 0 deletions
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6
lib/sbi/sbi_hart_pmp.c
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@@ -204,6 +204,9 @@ static int sbi_hart_smepmp_configure(struct sbi_scratch *scratch)
sbi_hart_smepmp_set(scratch, dom, reg, pmp_idx++, pmp_flags,
pmp_log2gran, pmp_addr_max);
}
/* Disable remaining PMP entries */
for(; pmp_idx < pmp_count; pmp_idx++)
pmp_disable(pmp_idx);
/*
* All entries are programmed.
@@ -286,6 +289,9 @@ static int sbi_hart_oldpmp_configure(struct sbi_scratch *scratch)
reg->order);
}
}
/* Disable remaining PMP entries */
for(; pmp_idx < pmp_count; pmp_idx++)
pmp_disable(pmp_idx);
sbi_hart_pmp_fence();
return 0;