Mirrors/opensbi
1
0
Fork 1
mirror of https://github.com/riscv-software-src/opensbi.git synced 2025-08-24 15:31:22 +01:00
Code Issues Packages Projects Releases Wiki Activity

lib: Delegate supervisor ecall to HS-mode when H extension available

Browse Source 
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>
This commit is contained in:
Anup Patel
2019-04-05 13:17:42 +05:30
committed by Anup Patel
parent 1ed9eb255d
commit 0089897d41
1 changed files with 8 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files

8
lib/sbi/sbi_hart.c
View File

@@ -87,6 +87,14 @@ static int delegate_traps(struct sbi_scratch *scratch, u32 hartid)
(1U << CAUSE_LOAD_PAGE_FAULT) | (1U << CAUSE_LOAD_PAGE_FAULT) |
(1U << CAUSE_STORE_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_MIDELEG, interrupts);
csr_write(CSR_MEDELEG, exceptions); csr_write(CSR_MEDELEG, exceptions);