diff options
| author | Himanshu Chauhan <[email protected]> | 2023-07-12 10:04:32 +0530 |
|---|---|---|
| committer | Anup Patel <[email protected]> | 2023-07-13 12:27:50 +0530 |
| commit | 4a42a2347c757457f455d9293812a32a7552e4d5 (patch) | |
| tree | 1cee75af77fecf1254a225c3286aadc38a97771c | |
| parent | d72f5f17478dfef3df817339a0f02cfdb77a1dc1 (diff) | |
lib: sbi: Grant SU R/W/X permissions to whole memory
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 <[email protected]>
Reviewed-by: Anup Patel <[email protected]>
| -rw-r--r-- | lib/sbi/sbi_domain.c | 14 |
1 files changed, 10 insertions, 4 deletions
diff --git a/lib/sbi/sbi_domain.c b/lib/sbi/sbi_domain.c index 38a5902f..acd0f74c 100644 --- a/lib/sbi/sbi_domain.c +++ b/lib/sbi/sbi_domain.c @@ -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 */ |