Add feature Smcdeleg #1913
Add feature Smcdeleg #1913
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@JJ-Gaisler The commit history looks messed up; several unrelated commits are included in the changelog. @bcstrongx could I ask you to review this PR at some point (ignoring the aforementioned unrelated commits), since you authored the spec? |
| // looks for the select value it won't find any csr and thus throw illegal. | ||
| // The spec states that an access to any sireg* in VS mode should raise virtual if menvcfg.cde = 1. | ||
| // Most likely the motivation for this is to not leak information about which extensions the | ||
| // underlying machine has implemented. |
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The VIE also allows the hypervisor to emulate the state (counter, in this case) access
| auto sireg3 = std::dynamic_pointer_cast<virtualized_indirect_csr_t>(csrmap.at(CSR_SIREG3)); | ||
| auto sireg4 = std::dynamic_pointer_cast<virtualized_indirect_csr_t>(csrmap.at(CSR_SIREG4)); | ||
| auto sireg5 = std::dynamic_pointer_cast<virtualized_indirect_csr_t>(csrmap.at(CSR_SIREG5)); | ||
| auto sireg6 = std::dynamic_pointer_cast<virtualized_indirect_csr_t>(csrmap.at(CSR_SIREG6)); |
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Seems like addition of sireg* should depend only on Sscsrind, not Smcdeleg (or Ssccfg). I assume we'll eventually add support for things like Smctr/Ssctr, which also use sireg*.
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Hi! Thanks for reviewing. This doesn't add sireg* as a csr it only casts the existing sireg* CSRs to the correct type to be able to use them. Sireg* is not directly available in this scope which is why I retrieve them from the csrmap.
missing proxy csr and check for csr privilege in sscsring_reg_csr_t since mireg uses the same class. Add stateen checks for scontext/hcontext Fix for issue: 1893
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Hopefully this is addressed now, something in the rebase must have gone wrong. |
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This PR is based on the following PR : #1896
Please see attached test case, the test checks the exception logic related to the extension and that proxy counters work as intended.
spike -m0x80000000:0x10000000,0x20000000:0x1000,0x4000:0x1000,0xB000:0x1000 --isa rv64gh_svinval_zba_zbb_zbc_zbs_zfh_zfa_zbkb_zbkx_zicsr_zifencei_sscofpmf_smstateen_smepmp_zicbom_zicntr_zihpm_svadu_sstc_zicond_smcdeleg_smcsrind_sscsrind -p1 csr_test.txtcsr_test.txt