diff options
Diffstat (limited to 'lib')
| -rw-r--r-- | lib/sbi/sbi_hart.c | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/lib/sbi/sbi_hart.c b/lib/sbi/sbi_hart.c index 46cd55d0..e2b93e6b 100644 --- a/lib/sbi/sbi_hart.c +++ b/lib/sbi/sbi_hart.c @@ -914,6 +914,16 @@ __pmp_skip: /* Mark hart feature detection done */ hfeatures->detected = true; + /* + * On platforms with Smepmp, the previous booting stage must + * enter OpenSBI with mseccfg.MML == 0. This allows OpenSBI + * to configure it's own M-mode only regions without depending + * on the previous booting stage. + */ + if (sbi_hart_has_extension(scratch, SBI_HART_EXT_SMEPMP) && + (csr_read(CSR_MSECCFG) & MSECCFG_MML)) + return SBI_EILL; + return 0; } |