diff options
| author | Yu-Chien Peter Lin <[email protected]> | 2025-10-08 16:44:39 +0800 |
|---|---|---|
| committer | Anup Patel <[email protected]> | 2025-11-02 16:06:51 +0530 |
| commit | 90c3b94094d052e8109862a8b05d2885b1c3d879 (patch) | |
| tree | 1df32b4a9a22c9cfe1dcaa1ec374dbde17260634 | |
| parent | 667eed22661a5c5a7b73654ea3ea81737a6a1188 (diff) | |
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 <[email protected]>
Reviewed-by: Anup Patel <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Anup Patel <[email protected]>
| -rw-r--r-- | lib/sbi/sbi_domain.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/lib/sbi/sbi_domain.c b/lib/sbi/sbi_domain.c index 89250d4c..f7bd7d5b 100644 --- a/lib/sbi/sbi_domain.c +++ b/lib/sbi/sbi_domain.c @@ -125,6 +125,7 @@ void sbi_domain_memregion_init(unsigned long addr, unsigned int sbi_domain_get_smepmp_flags(struct sbi_domain_memregion *reg) { unsigned int pmp_flags = 0; + unsigned long rstart, rend; if ((reg->flags & SBI_DOMAIN_MEMREGION_ACCESS_MASK) == 0) { /* @@ -185,6 +186,11 @@ unsigned int sbi_domain_get_smepmp_flags(struct sbi_domain_memregion *reg) pmp_flags |= PMP_W; if (reg->flags & SBI_DOMAIN_MEMREGION_SU_EXECUTABLE) pmp_flags |= PMP_X; + } else { + rstart = reg->base; + rend = (reg->order < __riscv_xlen) ? rstart + ((1UL << reg->order) - 1) : -1UL; + sbi_printf("%s: Unsupported Smepmp permissions on region 0x%"PRILX"-0x%"PRILX"\n", + __func__, rstart, rend); } return pmp_flags; |