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.S | ||
linuxboot_dma.c | ||
Makefile | ||
multiboot.S | ||
multiboot_dma.S | ||
optionrom.h | ||
optrom.h | ||
optrom_fw_cfg.h | ||
pvh.S | ||
pvh_main.c |