From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:37346) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1fBzsI-0002Oi-AE for qemu-devel@nongnu.org; Fri, 27 Apr 2018 05:41:07 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1fBzsH-0003xF-Gm for qemu-devel@nongnu.org; Fri, 27 Apr 2018 05:41:06 -0400 From: Thomas Huth Date: Fri, 27 Apr 2018 11:40:43 +0200 Message-Id: <1524822046-22779-2-git-send-email-thuth@redhat.com> In-Reply-To: <1524822046-22779-1-git-send-email-thuth@redhat.com> References: <1524822046-22779-1-git-send-email-thuth@redhat.com> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: quoted-printable Subject: [Qemu-devel] [PATCH v3 1/4] tests/boot-sector: Add magic bytes to s390x boot code header List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: qemu-devel@nongnu.org, John Snow Cc: qemu-block@nongnu.org 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. Reviewed-by: Christian Borntraeger Reviewed-by: Philippe Mathieu-Daud=C3=A9 Reviewed-by: Michael S. Tsirkin Reviewed-by: Herv=C3=A9 Poussineau Acked-By: Mark Cave-Ayland Signed-off-by: Thomas Huth --- 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..7824286 100644 --- a/tests/boot-sector.c +++ b/tests/boot-sector.c @@ -68,8 +68,11 @@ static uint8_t x86_boot_sector[512] =3D { }; =20 /* For s390x, use a mini "kernel" with the appropriate signature */ -static const uint8_t s390x_psw[] =3D { - 0x00, 0x08, 0x00, 0x00, 0x80, 0x01, 0x00, 0x00 +static const uint8_t s390x_psw_and_magic[] =3D { + 0x00, 0x08, 0x00, 0x00, 0x80, 0x01, 0x00, 0x00, /* Program status w= ord */ + 0x02, 0x00, 0x00, 0x18, 0x60, 0x00, 0x00, 0x50, /* Magic: = */ + 0x02, 0x00, 0x00, 0x68, 0x60, 0x00, 0x00, 0x50, /* see linux_s390_m= agic */ + 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40 /* in the s390-ccw = bios */ }; static const uint8_t s390x_code[] =3D { 0xa7, 0xf4, 0x00, 0x0a, /* j 0x10010 = */ @@ -110,7 +113,7 @@ int boot_sector_init(char *fname) } else if (g_str_equal(arch, "s390x")) { len =3D 0x10000 + sizeof(s390x_code); boot_code =3D g_malloc0(len); - memcpy(boot_code, s390x_psw, sizeof(s390x_psw)); + memcpy(boot_code, s390x_psw_and_magic, sizeof(s390x_psw_and_magi= c)); memcpy(&boot_code[0x10000], s390x_code, sizeof(s390x_code)); } else { g_assert_not_reached(); --=20 1.8.3.1