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Walling" To: borntraeger@de.ibm.com, frankja@linux.vnet.ibm.com, qemu-s390x@nongnu.org, qemu-devel@nongnu.org Date: Mon, 27 Nov 2017 15:55:33 -0500 X-Mailer: git-send-email 2.7.4 In-Reply-To: <1511816136-30068-1-git-send-email-walling@linux.vnet.ibm.com> References: <1511816136-30068-1-git-send-email-walling@linux.vnet.ibm.com> X-TM-AS-GCONF: 00 x-cbid: 17112720-2213-0000-0000-00000241FCC0 X-IBM-SpamModules-Scores: X-IBM-SpamModules-Versions: BY=3.00008121; HX=3.00000241; KW=3.00000007; PH=3.00000004; SC=3.00000241; SDB=6.00952101; UDB=6.00480947; IPR=6.00732182; BA=6.00005715; NDR=6.00000001; ZLA=6.00000005; ZF=6.00000009; ZB=6.00000000; ZP=6.00000000; ZH=6.00000000; ZU=6.00000002; MB=3.00018212; XFM=3.00000015; UTC=2017-11-27 20:56:11 X-IBM-AV-DETECTION: SAVI=unused REMOTE=unused XFE=unused x-cbparentid: 17112720-2214-0000-0000-00005847D3E7 Message-Id: <1511816136-30068-3-git-send-email-walling@linux.vnet.ibm.com> X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10432:, , definitions=2017-11-27_10:, , signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 priorityscore=1501 malwarescore=0 suspectscore=2 phishscore=0 bulkscore=0 spamscore=0 clxscore=1015 lowpriorityscore=0 impostorscore=0 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.0.1-1709140000 definitions=main-1711270279 X-detected-operating-system: by eggs.gnu.org: GNU/Linux 3.x [generic] [fuzzy] X-Received-From: 148.163.158.5 Subject: [Qemu-devel] [PATCH v1 2/5] s390-ccw: ipl structs for eckd cdl/ldl X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" X-ZohoMail: RSF_6 Z_629925259 SPT_0 Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" ECKD DASDs have different IPL structures for CDL and LDL formats. The current Ipl1 and Ipl2 structs follow the CDL format, so we prepend "EckdCdl" to them. A new struct, EckdLdlIpl1 is introduced and contains boot info for LDL. Also introduce structs for IPL stages 1 and 1b and for disk geometry. Signed-off-by: Collin L. Walling Acked-by: Janosch Frank --- pc-bios/s390-ccw/bootmap.c | 24 ++++++++++---------- pc-bios/s390-ccw/bootmap.h | 55 +++++++++++++++++++++++++++++++++---------= ---- 2 files changed, 53 insertions(+), 26 deletions(-) diff --git a/pc-bios/s390-ccw/bootmap.c b/pc-bios/s390-ccw/bootmap.c index 6f8e30f..5546b79 100644 --- a/pc-bios/s390-ccw/bootmap.c +++ b/pc-bios/s390-ccw/bootmap.c @@ -221,9 +221,9 @@ static void run_eckd_boot_script(block_number_t mbr_blo= ck_nr) static void ipl_eckd_cdl(void) { XEckdMbr *mbr; - Ipl2 *ipl2 =3D (void *)sec; + EckdCdlIpl2 *ipl2 =3D (void *)sec; IplVolumeLabel *vlbl =3D (void *)sec; - block_number_t block_nr; + block_number_t mbr_block_nr; =20 /* we have just read the block #0 and recognized it as "IPL1" */ sclp_print("CDL\n"); @@ -231,7 +231,7 @@ static void ipl_eckd_cdl(void) memset(sec, FREE_SPACE_FILLER, sizeof(sec)); read_block(1, ipl2, "Cannot read IPL2 record at block 1"); =20 - mbr =3D &ipl2->u.x.mbr; + mbr =3D &ipl2->mbr; IPL_assert(magic_match(mbr, ZIPL_MAGIC), "No zIPL section in IPL2 reco= rd."); IPL_assert(block_size_ok(mbr->blockptr.xeckd.bptr.size), "Bad block size in zIPL section of IPL2 record."); @@ -239,7 +239,7 @@ static void ipl_eckd_cdl(void) "Non-ECKD device type in zIPL section of IPL2 record."); =20 /* save pointer to Boot Script */ - block_nr =3D eckd_block_num((void *)&(mbr->blockptr)); + mbr_block_nr =3D eckd_block_num((void *)&(mbr->blockptr)); =20 memset(sec, FREE_SPACE_FILLER, sizeof(sec)); read_block(2, vlbl, "Cannot read Volume Label at block 2"); @@ -249,7 +249,7 @@ static void ipl_eckd_cdl(void) "Invalid magic of volser block"); print_volser(vlbl->f.volser); =20 - run_eckd_boot_script(block_nr); + run_eckd_boot_script(mbr_block_nr); /* no return */ } =20 @@ -280,8 +280,8 @@ static void print_eckd_ldl_msg(ECKD_IPL_mode_t mode) =20 static void ipl_eckd_ldl(ECKD_IPL_mode_t mode) { - block_number_t block_nr; - BootInfo *bip =3D (void *)(sec + 0x70); /* BootInfo is MBR for LDL */ + block_number_t mbr_block_nr; + EckdLdlIpl1 *ipl1 =3D (void *)sec; =20 if (mode !=3D ECKD_LDL_UNLABELED) { print_eckd_ldl_msg(mode); @@ -292,15 +292,17 @@ static void ipl_eckd_ldl(ECKD_IPL_mode_t mode) memset(sec, FREE_SPACE_FILLER, sizeof(sec)); read_block(0, sec, "Cannot read block 0 to grab boot info."); if (mode =3D=3D ECKD_LDL_UNLABELED) { - if (!magic_match(bip->magic, ZIPL_MAGIC)) { + if (!magic_match(ipl1->boot_info.magic, ZIPL_MAGIC)) { return; /* not applicable layout */ } sclp_print("unlabeled LDL.\n"); } - verify_boot_info(bip); + verify_boot_info(&ipl1->boot_info); + + mbr_block_nr =3D + eckd_block_num((void *)&(ipl1->boot_info.bp.ipl.bm_ptr.eckd.bptr)); =20 - block_nr =3D eckd_block_num((void *)&(bip->bp.ipl.bm_ptr.eckd.bptr)); - run_eckd_boot_script(block_nr); + run_eckd_boot_script(mbr_block_nr); /* no return */ } =20 diff --git a/pc-bios/s390-ccw/bootmap.h b/pc-bios/s390-ccw/bootmap.h index 4980838..a2b4695 100644 --- a/pc-bios/s390-ccw/bootmap.h +++ b/pc-bios/s390-ccw/bootmap.h @@ -226,22 +226,47 @@ typedef struct BootInfo { /* @ 0x70, record = #0 */ } bp; } __attribute__ ((packed)) BootInfo; /* see also XEckdMbr */ =20 -typedef struct Ipl1 { - unsigned char key[4]; /* =3D=3D "IPL1" */ - unsigned char data[24]; -} __attribute__((packed)) Ipl1; +/* + * Structs for IPL + */ +#define STAGE2_BLK_CNT_MAX 24 /* Stage 1b can load up to 24 blocks */ =20 -typedef struct Ipl2 { - unsigned char key[4]; /* =3D=3D "IPL2" */ - union { - unsigned char data[144]; - struct { - unsigned char reserved1[92-4]; - XEckdMbr mbr; - unsigned char reserved2[144-(92-4)-sizeof(XEckdMbr)]; - } x; - } u; -} __attribute__((packed)) Ipl2; +typedef struct EckdCdlIpl1 { + uint8_t key[4]; /* =3D=3D "IPL1" */ + uint8_t data[24]; +} __attribute__((packed)) EckdCdlIpl1; + +typedef struct BootEckdSeekarg { + uint16_t pad; + uint16_t cyl; + uint16_t head; + uint8_t sec; + uint8_t pad2; +} __attribute__ ((packed)) BootEckdSeekarg; + +typedef struct BootEckdStage1b { + uint8_t reserved[32 * STAGE2_BLK_CNT_MAX]; + struct BootEckdSeekarg seek[STAGE2_BLK_CNT_MAX]; + uint8_t unused[64]; +} __attribute__ ((packed)) BootEckdStage1b; + +typedef struct BootEckdStage1 { + uint8_t reserved[72]; + struct BootEckdSeekarg seek[2]; +} __attribute__ ((packed)) BootEckdStage1; + +typedef struct EckdCdlIpl2 { + uint8_t key[4]; /* =3D=3D "IPL2" */ + struct BootEckdStage1 stage1; + XEckdMbr mbr; + uint8_t reserved2[24]; +} __attribute__((packed)) EckdCdlIpl2; + +typedef struct EckdLdlIpl1 { + uint8_t reserved[24]; + struct BootEckdStage1 stage1; + BootInfo boot_info; /* BootInfo is MBR for LDL */ +} __attribute__((packed)) EckdLdlIpl1; =20 typedef struct IplVolumeLabel { unsigned char key[4]; /* =3D=3D "VOL1" */ --=20 2.7.4