diff options
Diffstat (limited to 'results/classifier/gemma3:12b/boot/1814343')
| -rw-r--r-- | results/classifier/gemma3:12b/boot/1814343 | 31 |
1 files changed, 31 insertions, 0 deletions
diff --git a/results/classifier/gemma3:12b/boot/1814343 b/results/classifier/gemma3:12b/boot/1814343 new file mode 100644 index 00000000..16e8f157 --- /dev/null +++ b/results/classifier/gemma3:12b/boot/1814343 @@ -0,0 +1,31 @@ + +Initrd not loaded on riscv32 + +I attempted to run qemu with a ram disk. However, when reading the contents of the disk from within the VM I only get back zeros. + +I was able to trace the issue to a mismatch of expectations on line 93 of hw/riscv/virt.c. Specifically, when running in 32-bit mode the value of kernel_entry is sign extended to 64-bits, but load_image_targphys expects the start address to not be sign extended. + +Straw man patch (works for 32-bit but would probably break 64-bit VMs?): + +diff --git a/hw/riscv/virt.c b/hw/riscv/virt.c +index e7f0716fb6..32216f993c 100644 +--- a/hw/riscv/virt.c ++++ b/hw/riscv/virt.c +@@ -90,7 +90,7 @@ static hwaddr load_initrd(const char *filename, uint64_t mem_size, + * halfway into RAM, and for boards with 256MB of RAM or more we put + * the initrd at 128MB. + */ +- *start = kernel_entry + MIN(mem_size / 2, 128 * MiB); ++ *start = (kernel_entry & 0xffffffff) + MIN(mem_size / 2, 128 * MiB); + + size = load_ramdisk(filename, *start, mem_size - *start); + if (size == -1) { + + +Run command: + +$ qemu/build/riscv32-softmmu/qemu-system-riscv32 -machine virt -kernel mykernel.elf -nographic -initrd payload + +Commit hash: + +3a183e330dbd7dbcac3841737ac874979552cca2 \ No newline at end of file |