Yu-Chien Peter Lin and Anup Patel
b34caeef81
lib: sbi_domain: add SBI_DOMAIN_MEMREGION_FW memregion flag
...
Add a new memregion flag, SBI_DOMAIN_MEMREGION_FW and mark the
OpenSBI code and data regions.
Signed-off-by: Yu-Chien Peter Lin <peter.lin@sifive.com >
Reviewed-by: Anup Patel <anup@brainfault.org >
Link: https://lore.kernel.org/r/20251008084444.3525615-6-peter.lin@sifive.com
Signed-off-by: Anup Patel <anup@brainfault.org >
2025-11-02 16:26:19 +05:30
Yu-Chien Peter Lin and Anup Patel
34657b377f
lib: sbi_hart: return error when insufficient PMP entries available
...
Previously, when memory regions exceed available PMP entries,
some regions were silently ignored. If the last entry that covers
the full 64-bit address space is not added to a domain, the next
stage S-mode software won't have permission to access and fetch
instructions from its memory. So return early with error message
to catch such situation.
Signed-off-by: Yu-Chien Peter Lin <peter.lin@sifive.com >
Reviewed-by: Anup Patel <anup@brainfault.org >
Link: https://lore.kernel.org/r/20251008084444.3525615-5-peter.lin@sifive.com
Signed-off-by: Anup Patel <anup@brainfault.org >
2025-11-02 16:21:07 +05:30
Yu-Chien Peter Lin and Anup Patel
90c3b94094
lib: sbi_domain: print unsupported SmePMP permissions
...
The reg->flag is encoded with 6 bits to specify RWX
permissions for M-mode and S-/U-mode. However, only
16 of the possible encodings are valid on SmePMP.
Add a warning message when an unsupported permission
encoding is detected.
Signed-off-by: Yu-Chien Peter Lin <peter.lin@sifive.com >
Reviewed-by: Anup Patel <anup@brainfault.org >
Link: https://lore.kernel.org/r/20251008084444.3525615-4-peter.lin@sifive.com
Signed-off-by: Anup Patel <anup@brainfault.org >
2025-11-02 16:06:51 +05:30
Yu-Chien Peter Lin and Anup Patel
667eed2266
lib: sbi_domain: allow specifying inaccessible region
...
According to the RISC‑V Privileged Specification, SmePMP
regions that grant no access in any privilege mode are
valid. Allow such regions to be specified.
Signed-off-by: Yu-Chien Peter Lin <peter.lin@sifive.com >
Reviewed-by: Anup Patel <anup@brainfault.org >
Link: https://lore.kernel.org/r/20251008084444.3525615-3-peter.lin@sifive.com
Signed-off-by: Anup Patel <anup@brainfault.org >
2025-11-02 16:03:35 +05:30
Yu-Chien Peter Lin and Anup Patel
32c1d38dcf
lib: sbi_hart: move sbi_hart_get_smepmp_flags() to sbi_domain
...
Move sbi_hart_get_smepmp_flags() from sbi_hart.c to sbi_domain.c and
rename it to sbi_domain_get_smepmp_flags() to better reflect its
purpose of converting domain memory region flags to PMP configuration.
Also removes unused parameters (scratch and dom).
Signed-off-by: Yu-Chien Peter Lin <peter.lin@sifive.com >
Reviewed-by: Anup Patel <anup@brainfault.org >
Link: https://lore.kernel.org/r/20251008084444.3525615-2-peter.lin@sifive.com
Signed-off-by: Anup Patel <anup@brainfault.org >
2025-11-02 15:55:57 +05:30
Yu-Chien Peter Lin and Anup Patel
5de8c1d499
lib: serial: sifive-uart: add shared memory region for SiFive UART
...
Add shared memory region so the driver has permission
to access it in OpenSBI.
Signed-off-by: Yu-Chien Peter Lin <peter.lin@sifive.com >
Reviewed-by: Anup Patel <anup@brainfault.org >
Link: https://lore.kernel.org/r/20250814111012.20151-1-peter.lin@sifive.com
Signed-off-by: Anup Patel <anup@brainfault.org >
2025-10-06 11:13:20 +05:30
