RV64 QEMU-Virt Initialization Issue

[PeterWrighten]

Currently, I finished RV64 PageTable and try runing it on QEMU, but there is an initialization issue which is not easy to observe until I finished RV32 PageTable. In comparison with it, I found that it is weird when I ran make qemu-riscv64 and it had no performance which seems not caused by RELEASE=1 compilation.

timeout 10s qemu-system-riscv64 -machine virt -bios none -kernel awkernel_rv64.bin -m 1G
      -nographic -smp 4
  ⎿  Error: qemu-system-riscv64: terminating on signal 15 from pid 87052 (<unknown process>)

     failed to allocate heap memory
     aborting...

I suspect this issue is related to SV39's heap size(512GiB) is so much larger than qemu's address space limit, and we should change something to ensure it can run on QEMU.

[PeterWrighten]

Solution:

Implement Dynamically heap start allocation

[PeterWrighten]

Solution:

Implement Dynamically heap start allocation

Redesign for Heap Start Decider is necessary. WIP.