On 03/15/2018 08:49 AM, Thomas Huth wrote: > We're going to use the s390x boot code for testing CD-ROM booting. > But the ISO loader of the s390-ccw bios is a little bit more picky > than the network loader and expects some magic bytes in the header > of the file (see linux_s390_magic in pc-bios/s390-ccw/bootmap.c), so > we've got to add them in our boot code here, too. > > Signed-off-by: Thomas Huth <th...@redhat.com>
Reviewed-by: Christian Borntraeger <borntrae...@de.ibm.com> > --- > tests/boot-sector.c | 9 ++++++--- > 1 file changed, 6 insertions(+), 3 deletions(-) > > diff --git a/tests/boot-sector.c b/tests/boot-sector.c > index c373f0e..04721c9 100644 > --- a/tests/boot-sector.c > +++ b/tests/boot-sector.c > @@ -68,8 +68,11 @@ static uint8_t x86_boot_sector[512] = { > }; > > /* For s390x, use a mini "kernel" with the appropriate signature */ > -static const uint8_t s390x_psw[] = { > - 0x00, 0x08, 0x00, 0x00, 0x80, 0x01, 0x00, 0x00 > +static const uint8_t s390x_psw_and_magic[] = { > + 0x00, 0x08, 0x00, 0x00, 0x80, 0x01, 0x00, 0x00, > + 0x02, 0x00, 0x00, 0x18, 0x60, 0x00, 0x00, 0x50, > + 0x02, 0x00, 0x00, 0x68, 0x60, 0x00, 0x00, 0x50, > + 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40 > }; > static const uint8_t s390x_code[] = { > 0xa7, 0xf4, 0x00, 0x0a, /* j 0x10010 */ > @@ -110,7 +113,7 @@ int boot_sector_init(char *fname) > } else if (g_str_equal(arch, "s390x")) { > len = 0x10000 + sizeof(s390x_code); > boot_code = g_malloc0(len); > - memcpy(boot_code, s390x_psw, sizeof(s390x_psw)); > + memcpy(boot_code, s390x_psw_and_magic, sizeof(s390x_psw_and_magic)); > memcpy(&boot_code[0x10000], s390x_code, sizeof(s390x_code)); > } else { > g_assert_not_reached(); >