Long long ago, linux kernel have supported up to 4G initrd, but it's header
still
hard code to allow 2G - 1 only.
# (Header version 0x0203 or later) the highest safe address for the contents
# of an initrd. The current kernel allows up to 4 GB, but leave it at 2 GB to
# avoid possible bootloader bugs.
kexec is one of the known scenario which has supported up to 4G initrd.
This patches is to enable up to 4G initrd, Seabios + optionrom(linuxboot_dma)
works as expected so far.
3/3 has a huge change of address/memory APIs.
I replace 'int len' in a stupid way, but it looks not safety.
$ sed -i 's/int len/uint32_t len/' exec.c
$ make # and check compiling errors
$ sed -i 's/int len/uint32_t len/' cpu-all.h
$ make -i 's/int len/uint32_t len/' include/exec/cpu-common.h
$ make -i 's/int len/uint32_t len/' include/exec/memory.h
$ make # all errors gone
CC: Paolo Bonzini <address@hidden>
CC: Peter Crosthwaite <address@hidden>
CC: Richard Henderson <address@hidden>
Li Zhijian (3):
i386: set initrd_max to 4G - 1 to allow up to 4G initrd
change size type from int to int64_t on load_image()
change int len to uin32_t len
exec.c | 42 +++++++++++++++++++++---------------------
hw/core/loader.c | 3 ++-
hw/i386/pc.c | 6 ++++++
include/exec/cpu-all.h | 2 +-
include/exec/cpu-common.h | 10 +++++-----
include/exec/memory.h | 20 ++++++++++----------
6 files changed, 45 insertions(+), 38 deletions(-)