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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>
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@ -87,6 +87,14 @@ static int delegate_traps(struct sbi_scratch *scratch, u32 hartid)
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(1U << CAUSE_LOAD_PAGE_FAULT) |
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(1U << CAUSE_STORE_PAGE_FAULT);
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/*
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* If hypervisor extension available then we only handle
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* hypervisor calls (i.e. ecalls from HS-mode) and we let
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* HS-mode handle supervisor calls (i.e. ecalls from VS-mode)
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*/
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if (misa_extension('H'))
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exceptions |= (1U << CAUSE_SUPERVISOR_ECALL);
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csr_write(CSR_MIDELEG, interrupts);
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csr_write(CSR_MEDELEG, exceptions);
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