From 0089897d41b5b2382acba1c2c9f9386edad75228 Mon Sep 17 00:00:00 2001 From: Anup Patel Date: Fri, 5 Apr 2019 13:17:42 +0530 Subject: 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 --- lib/sbi/sbi_hart.c | 8 ++++++++ 1 file changed, 8 insertions(+) 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); -- cgit v1.2.3