On Mon, Apr 29, 2019 at 12:05:33AM +0300, David Woodhouse wrote: > When I kexec either Xen or Linux in real mode, from either Xen or > Linux, it fails. > > The last thing I see looks like SeaBIOS trying to use SMM for call32: > > ---------------- > IN: > 0x00000000000f70ec: mov %eax,%esi > 0x00000000000f70ef: mov $0xb5,%eax > 0x00000000000f70f5: mov $0x1234,%ecx > 0x00000000000f70fb: mov $0xef3dc,%ebx > 0x00000000000f7101: out %al,$0xb2 > 0x00000000000f7103: pause > > ---------------- > IN: > 0x00000000000ef3db: hlt > > This happens when the real mode boot code calls INT 13h to read from > the disk. It seems to happen with virtio and SATA disks. > > This is with the Ubuntu-packaged 1.10.2-1ubuntu1 SeaBIOS. Switching to > an IDE disk, or booting with 'edd=skipmbr', makes Xen work and Linux > get a little further before it dies anyway. Hi David, That call trace certainly looks odd. The SeaBIOS debugging info would help - try compiling SeaBIOS with debug level 8 and grab the log (as described at: https://www.seabios.org/Debugging#Diagnostic_information ). -Kevin _______________________________________________ kexec mailing list kexec@xxxxxxxxxxxxxxxxxxx http://lists.infradead.org/mailman/listinfo/kexec
