diff options
| author | Damien Le Moal <damien.lemoal@wdc.com> | 2018-12-21 13:19:54 +0300 |
|---|---|---|
| committer | Anup Patel <anup@brainfault.org> | 2018-12-21 14:02:30 +0300 |
| commit | 27332e63faaf6d3220a9d56bcfb280921114f012 (patch) | |
| tree | 10ab1d82fc03f31c851e2b38dab15929bd6be8b8 /lib | |
| parent | db6c1fe78bebc103670becba39e1c34bcdc48185 (diff) | |
| download | opensbi-27332e63faaf6d3220a9d56bcfb280921114f012.tar.xz | |
Introduce HAS_MFAULTS_DELEGATION feature
Conditionnally delegate page fault exceptions from M mode to S mode
based on the platform features.
Signed-off-by: Damien Le Moal <damien.lemoal@wdc.com>
Diffstat (limited to 'lib')
| -rw-r--r-- | lib/sbi_hart.c | 12 |
1 files changed, 7 insertions, 5 deletions
diff --git a/lib/sbi_hart.c b/lib/sbi_hart.c index 01362dd..be114d6 100644 --- a/lib/sbi_hart.c +++ b/lib/sbi_hart.c @@ -83,8 +83,9 @@ static int fp_init(u32 hartid) return 0; } -static int delegate_traps(u32 hartid) +static int delegate_traps(struct sbi_scratch *scratch, u32 hartid) { + struct sbi_platform *plat = sbi_platform_ptr(scratch); unsigned long interrupts, exceptions; if (!misa_extension('S')) { @@ -95,11 +96,12 @@ static int delegate_traps(u32 hartid) /* Send M-mode interrupts and most exceptions to S-mode */ interrupts = MIP_SSIP | MIP_STIP | MIP_SEIP; exceptions = (1U << CAUSE_MISALIGNED_FETCH) | - (1U << CAUSE_FETCH_PAGE_FAULT) | (1U << CAUSE_BREAKPOINT) | - (1U << CAUSE_LOAD_PAGE_FAULT) | - (1U << CAUSE_STORE_PAGE_FAULT) | (1U << CAUSE_USER_ECALL); + if (sbi_platform_has_mfaults_delegation(plat)) + exceptions |= (1U << CAUSE_FETCH_PAGE_FAULT) | + (1U << CAUSE_LOAD_PAGE_FAULT) | + (1U << CAUSE_STORE_PAGE_FAULT); } csr_write(mideleg, interrupts); @@ -200,7 +202,7 @@ int sbi_hart_init(struct sbi_scratch *scratch, u32 hartid) if (rc) return rc; - rc = delegate_traps(hartid); + rc = delegate_traps(scratch, hartid); if (rc) return rc; |