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Fix read value of CSR mip. #1869

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Fix read value of CSR mip. #1869

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2 changes: 1 addition & 1 deletion riscv/csrs.cc
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Original file line number Diff line number Diff line change
Expand Up @@ -781,7 +781,7 @@ mip_csr_t::mip_csr_t(processor_t* const proc, const reg_t addr):
}

reg_t mip_csr_t::read() const noexcept {
return val | state->hvip->basic_csr_t::read();
return val | (state->hvip->basic_csr_t::read() & (MIP_VSEIP | MIP_VSTIP));
}

void mip_csr_t::backdoor_write_with_mask(const reg_t mask, const reg_t val) noexcept {
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