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lib: sbi_domain: add sbi_domain_get_oldpmp_flags

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Factor out logic in `sbi_hart_oldpmp_configure` into function
`sbi_domain_get_oldpmp_flags`, analogous to `sbi_domain_get_smepmp_flags`.
Platform specific hart-protection implementation can now leverage it.

Signed-off-by: Bo Gan <ganboing@gmail.com>
Reviewed-by: Anup Patel <anup@brainfault.org>
Link: https://lore.kernel.org/r/20251218104243.562667-3-ganboing@gmail.com
Signed-off-by: Anup Patel <anup@brainfault.org>
This commit is contained in:
Bo Gan
2025-12-18 02:42:38 -08:00
committed by Anup Patel
parent 707aa3231a
commit 2c1bf5bb73
3 changed files with 30 additions and 16 deletions
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7
include/sbi/sbi_domain.h
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@@ -253,6 +253,13 @@ void sbi_domain_memregion_init(unsigned long addr,
unsigned long flags,
struct sbi_domain_memregion *reg);
/**
* Return the oldpmp pmpcfg LRWX encoding for the flags in @reg.
*
* @param reg pointer to memory region; its flags field encodes permissions.
*/
unsigned int sbi_domain_get_oldpmp_flags(struct sbi_domain_memregion *reg);
/**
* Return the Smepmp pmpcfg LRWX encoding for the flags in @reg.
*