Mirrors/opensbi
4
0
Fork 1
mirror of https://github.com/riscv-software-src/opensbi.git synced 2025-11-22 19:01:33 +00:00
Code Issues Packages Projects Releases Wiki Activity

lib: sbi: sbi_hart: track firmware PMP entries for SmePMP

Browse Source 
Add fw_smepmp_ids bitmap to track PMP entries that protect firmware
regions. Allow us to preserve these critical entries across domain
transitions and check inconsistent firmware entry allocation.

Also add sbi_hart_smepmp_is_fw_region() helper function to query
whether a given SmePMP entry protects firmware 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/20251008084444.3525615-8-peter.lin@sifive.com
Signed-off-by: Anup Patel <anup@brainfault.org>
This commit is contained in:
Yu-Chien Peter Lin
2025-10-08 16:44:43 +08:00
committed by Anup Patel
parent 631efeeb49
commit b210376fe2
2 changed files with 30 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files

1
include/sbi/sbi_hart.h
View File

@@ -146,6 +146,7 @@ unsigned int sbi_hart_pmp_count(struct sbi_scratch *scratch);
unsigned int sbi_hart_pmp_log2gran(struct sbi_scratch *scratch);
unsigned int sbi_hart_pmp_addrbits(struct sbi_scratch *scratch);
unsigned int sbi_hart_mhpm_bits(struct sbi_scratch *scratch);
bool sbi_hart_smepmp_is_fw_region(unsigned int pmp_idx);
int sbi_hart_pmp_configure(struct sbi_scratch *scratch);
int sbi_hart_map_saddr(unsigned long base, unsigned long size);
int sbi_hart_unmap_saddr(void);