diff options
| author | Anup Patel <anup.patel@wdc.com> | 2019-04-05 13:17:42 +0530 |
|---|---|---|
| committer | Anup Patel <anup@brainfault.org> | 2019-09-30 15:14:00 +0530 |
| commit | 0089897d41b5b2382acba1c2c9f9386edad75228 (patch) | |
| tree | 98306718a8f3cb975ecd2a9c88ef4b74a38a239a | |
| parent | 1ed9eb255d865e75be2d2a87d9ef670c502294cc (diff) | |
lib: Delegate supervisor ecall to HS-mode when H extension available
When hypervisor extension is available, we only handle hypervisor
ecalls coming from HS-mode and we let hypervisor handle ecalls coming
from VS-mode.
Signed-off-by: Anup Patel <anup.patel@wdc.com>
| -rw-r--r-- | lib/sbi/sbi_hart.c | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/lib/sbi/sbi_hart.c b/lib/sbi/sbi_hart.c index 018fe85..6dac84b 100644 --- a/lib/sbi/sbi_hart.c +++ b/lib/sbi/sbi_hart.c @@ -87,6 +87,14 @@ static int delegate_traps(struct sbi_scratch *scratch, u32 hartid) (1U << CAUSE_LOAD_PAGE_FAULT) | (1U << CAUSE_STORE_PAGE_FAULT); + /* + * If hypervisor extension available then we only handle + * hypervisor calls (i.e. ecalls from HS-mode) and we let + * HS-mode handle supervisor calls (i.e. ecalls from VS-mode) + */ + if (misa_extension('H')) + exceptions |= (1U << CAUSE_SUPERVISOR_ECALL); + csr_write(CSR_MIDELEG, interrupts); csr_write(CSR_MEDELEG, exceptions); |