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lib: sbi: Grant SU R/W/X permissions to whole memory

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Since pmp entries have implicit priority on index, previous entries will
deny access to SU on M-mode region. Also, M-mode will not have access to
SU region while previous entries will allow access to M-mode regions.

Signed-off-by: Himanshu Chauhan <hchauhan@ventanamicro.com>
Reviewed-by: Anup Patel <anup@brainfault.org>
This commit is contained in:
Himanshu Chauhan
2023-07-12 10:04:32 +05:30
committed by Anup Patel
parent d72f5f1747
commit 4a42a2347c
1 changed files with 10 additions and 4 deletions
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14
lib/sbi/sbi_domain.c
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@@ -772,11 +772,17 @@ int sbi_domain_init(struct sbi_scratch *scratch, u32 cold_hartid)
root.fw_region_inited = true;
/* Root domain allow everything memory region */
/*
* Allow SU RWX on rest of the memory region. Since pmp entries
* have implicit priority on index, previous entries will
* deny access to SU on M-mode region. Also, M-mode will not
* have access to SU region while previous entries will allow
* access to M-mode regions.
*/
sbi_domain_memregion_init(0, ~0UL,
(SBI_DOMAIN_MEMREGION_READABLE |
SBI_DOMAIN_MEMREGION_WRITEABLE |
SBI_DOMAIN_MEMREGION_EXECUTABLE),
(SBI_DOMAIN_MEMREGION_SU_READABLE |
SBI_DOMAIN_MEMREGION_SU_WRITABLE |
SBI_DOMAIN_MEMREGION_SU_EXECUTABLE),
&root_memregs[root_memregs_count++]);
/* Root domain memory region end */