48972f8cad
Add a new option rom for the multiboot loader, using DMA transfers to copy data instead of "rep insb". This significantly lowers QEMU's startup latency by a factor of about 40, for example, going from 30sec to 0.8sec when loading modules of 120MB in size. Signed-off-by: Marcus Hähnel <marcus.haehnel@kernkonzept.com> Signed-off-by: Adam Lackorzynski <adam@l4re.org> [Modified to keep the non-DMA code depending on #ifdef USE_FW_CFG_DMA; do not write below stack. - Paolo] Signed-off-by: Paolo Bonzini <pbonzini@redhat.com> |
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| .. | ||
| code16gcc.h | ||
| flat.lds | ||
| kvmvapic.S | ||
| linuxboot_dma.c | ||
| linuxboot.S | ||
| Makefile | ||
| multiboot_dma.S | ||
| multiboot.S | ||
| optionrom.h | ||
| optrom_fw_cfg.h | ||
| optrom.h | ||
| pvh_main.c | ||
| pvh.S | ||