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lib: sbi: Introduce sbi_hart_pmp_unconfigure() function

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Currently, the unconfiguring PMP is implemented directly inside
switch_to_next_domain_context() whereas rest of the PMP programming
is done via functions implemented in sbi_hart.c.

Introduce a separate sbi_hart_pmp_unconfigure() function so that
all PMP programming is in one place.

Signed-off-by: Anup Patel <apatel@ventanamicro.com>
Link: https://lore.kernel.org/r/20251209135235.423391-2-apatel@ventanamicro.com
Signed-off-by: Anup Patel <anup@brainfault.org>
This commit is contained in:
Anup Patel
2025-12-09 19:22:31 +05:30
committed by Anup Patel
parent 4339e85794
commit 644a344226
3 changed files with 16 additions and 9 deletions
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14
lib/sbi/sbi_hart.c
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@@ -578,6 +578,20 @@ int sbi_hart_pmp_configure(struct sbi_scratch *scratch)
return rc;
}
void sbi_hart_pmp_unconfigure(struct sbi_scratch *scratch)
{
int i, pmp_count = sbi_hart_pmp_count(scratch);
for (i = 0; i < pmp_count; i++) {
/* Don't revoke firmware access permissions */
if (sbi_hart_smepmp_is_fw_region(i))
continue;
sbi_platform_pmp_disable(sbi_platform_ptr(scratch), i);
pmp_disable(i);
}
}
int sbi_hart_priv_version(struct sbi_scratch *scratch)
{
struct sbi_hart_features *hfeatures =