[PATCH -mm] kexec jump -v9
ying.huang at intel.com
Thu May 15 21:48:34 EDT 2008
On Thu, 2008-05-15 at 16:09 -0400, Vivek Goyal wrote:
> Ok, You want to make BIOS calls. We already do that using vm86 mode and
> use bios real mode interrupts. So why do we need this interface? Or, IOW,
> how is this interface better?
It can call code in 32-bit physical mode in addition to real mode. So It
can be used to call EFI runtime service, especially call EFI 64 runtime
service under 32-bit kernel or vice versa.
The main purpose of kexec jump is for hibernation. But I think if the
effort is small, why not support general 32-bit physical mode code call
at same time.
More information about the kexec