diff options
| author | Anup Patel <anup.patel@wdc.com> | 2019-05-23 11:00:58 +0300 |
|---|---|---|
| committer | Anup Patel <anup@brainfault.org> | 2019-05-24 05:52:47 +0300 |
| commit | a6395acd6cb2c35871481d3e4f0beaf449f8c0fd (patch) | |
| tree | 4361c3454a814e49cea8f53d0a6cf3885e7f280b /lib/sbi_ipi.c | |
| parent | bb915780ac76b146f3de47f105a95359e02f158c (diff) | |
| download | opensbi-a6395acd6cb2c35871481d3e4f0beaf449f8c0fd.tar.xz | |
lib: Handle page/access fault caused by unpriv load/store
The unpriv load/store instruction from M-mode can cause page/access
fault to M-mode if S-mode page table did not have mappings OR it did
not have PMP access permission.
To tackle this, we redirect trap back to S-mode if unpriv load/store
instruction traps in M-mode.
Signed-off-by: Anup Patel <anup.patel@wdc.com>
Reviewed-by: Atish Patra <atish.patra@wdc.com>
Diffstat (limited to 'lib/sbi_ipi.c')
| -rw-r--r-- | lib/sbi_ipi.c | 11 |
1 files changed, 7 insertions, 4 deletions
diff --git a/lib/sbi_ipi.c b/lib/sbi_ipi.c index da6b06d..48d5b22 100644 --- a/lib/sbi_ipi.c +++ b/lib/sbi_ipi.c @@ -58,15 +58,18 @@ done: return 0; } -int sbi_ipi_send_many(struct sbi_scratch *scratch, ulong *pmask, u32 event, - void *data) +int sbi_ipi_send_many(struct sbi_scratch *scratch, struct unpriv_trap *uptrap, + ulong *pmask, u32 event, void *data) { ulong i, m; ulong mask = sbi_hart_available_mask(); u32 hartid = sbi_current_hartid(); - if (pmask) - mask &= load_ulong(pmask); + if (pmask) { + mask &= load_ulong(pmask, scratch, uptrap); + if (uptrap->cause) + return SBI_ETRAP; + } /* send IPIs to every other hart on the set */ for (i = 0, m = mask; m; i++, m >>= 1) |