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mpfs_mpu: Check that size is valid for MPUCFG

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The size must be power-of-two for NAPOT according to the the PMP spec.

Signed-off-by: Jani Paalijarvi <jani.paalijarvi@unikie.com>
This commit is contained in:
Jani Paalijarvi 2024-05-24 08:57:41 +03:00 committed by Xiang Xiao
parent 9d4bd915eb
commit cfa544357e
1 changed files with 4 additions and 2 deletions
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6
arch/risc-v/src/mpfs/mpfs_mpu.c
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@ -159,9 +159,11 @@ int mpfs_mpu_set(uintptr_t reg, uintptr_t perm, uintptr_t base,
return -EACCES; return -EACCES;
} }
/* Base must be word aligned, minimum size is 4K */ /* Base must be word aligned,
* minimum size is 4K and it has to be power-of-two
*/
if ((base & 0x07) != 0 || size < 0x1000) if ((base & 0x07) != 0 || size < 0x1000 || (size & (size - 1)) != 0)
{ {
return -EINVAL; return -EINVAL;
} }