4 ms·
Yeah looks like bugs in riscv-boom rather than the RISC-V ISA itself
by Taniwha 2y ago
Yeah looks like bugs in riscv-boom rather than the RISC-V ISA itself
- Taniwha 2y agoIn particular this is a timing attack like Spectre/Meltdown - looks like there are timing issues with allocation of write port slots when writing to the register file - because division takes so long it's possible to use a late write from division to tell whether a particular speculative branch has been taken or not