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SUSE:SLE-12-SP4:GA
qemu.7445
0177-pc-bios-s390-ccw-factor-out-ipl-cod.patch
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File 0177-pc-bios-s390-ccw-factor-out-ipl-cod.patch of Package qemu.7445
From cc4c4f8ee85ea5cbd6c1ba243315a8b62a288ab9 Mon Sep 17 00:00:00 2001 From: "Eugene (jno) Dvurechenski" <jno@linux.vnet.ibm.com> Date: Mon, 19 May 2014 20:12:43 +0200 Subject: [PATCH] pc-bios/s390-ccw: factor out ipl code MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Move the scsi-disk specific ipl code from zipl_load() into a new function ipl_scsi(). This makes it easier to add ipl routines for other disk types. Acked-by: Christian Borntraeger <borntraeger@de.ibm.com> Signed-off-by: Eugene (jno) Dvurechenski <jno@linux.vnet.ibm.com> Signed-off-by: Jens Freimann <jfrei@linux.vnet.ibm.com> Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com> (cherry picked from commit a00b33d9e234b4ef3344697185219b84fca26c1a) Signed-off-by: Andreas Färber <afaerber@suse.de> --- pc-bios/s390-ccw/bootmap.c | 83 +++++++++++++++++++++++++--------------------- 1 file changed, 45 insertions(+), 38 deletions(-) diff --git a/pc-bios/s390-ccw/bootmap.c b/pc-bios/s390-ccw/bootmap.c index b57d4e1a07..d4e44c46da 100644 --- a/pc-bios/s390-ccw/bootmap.c +++ b/pc-bios/s390-ccw/bootmap.c @@ -12,7 +12,9 @@ #include "bootmap.h" #include "virtio.h" +#ifdef DEBUG /* #define DEBUG_FALLBACK */ +#endif #ifdef DEBUG_FALLBACK #define dputs(txt) \ @@ -23,8 +25,7 @@ #endif /* Scratch space */ -static uint8_t sec[MAX_SECTOR_SIZE] -__attribute__((__aligned__(MAX_SECTOR_SIZE))); +static uint8_t sec[MAX_SECTOR_SIZE*4] __attribute__((__aligned__(PAGE_SIZE))); typedef struct ResetInfo { uint32_t ipl_mask; @@ -74,19 +75,9 @@ static void jump_to_IPL_code(uint64_t address) virtio_panic("\n! IPL returns !\n"); } -/* Check for ZIPL magic. Returns 0 if not matched. */ -static int zipl_magic(uint8_t *ptr) -{ - uint32_t *p = (void *)ptr; - uint32_t *z = (void *)ZIPL_MAGIC; - - if (*p != *z) { - debug_print_int("invalid magic", *p); - virtio_panic("invalid magic"); - } - - return 1; -} +/*********************************************************************** + * IPL a SCSI disk + */ static void zipl_load_segment(ComponentEntry *entry) { @@ -94,8 +85,10 @@ static void zipl_load_segment(ComponentEntry *entry) ScsiBlockPtr *bprs = (void *)sec; const int bprs_size = sizeof(sec); block_number_t blockno; - long address; + uint64_t address; int i; + char err_msg[] = "zIPL failed to read BPRS at 0xZZZZZZZZZZZZZZZZ"; + char *blk_no = &err_msg[30]; /* where to print blockno in (those ZZs) */ blockno = entry->data.blockno; address = entry->load_address; @@ -105,11 +98,11 @@ static void zipl_load_segment(ComponentEntry *entry) do { memset(bprs, FREE_SPACE_FILLER, bprs_size); - debug_print_int("reading bprs at", blockno); - read_block(blockno, bprs, "zipl_load_segment: cannot read block"); + fill_hex_val(blk_no, &blockno, sizeof(blockno)); + read_block(blockno, bprs, err_msg); for (i = 0;; i++) { - u64 *cur_desc = (void *)&bprs[i]; + uint64_t *cur_desc = (void *)&bprs[i]; blockno = bprs[i].blockno; if (!blockno) { @@ -134,7 +127,7 @@ static void zipl_load_segment(ComponentEntry *entry) } address = virtio_load_direct(cur_desc[0], cur_desc[1], 0, (void *)address); - IPL_assert(address != -1, "zipl_load_segment: wrong IPL address"); + IPL_assert(address != -1, "zIPL load segment failed"); } } while (blockno); } @@ -146,13 +139,11 @@ static void zipl_run(ScsiBlockPtr *pte) ComponentEntry *entry; uint8_t tmp_sec[MAX_SECTOR_SIZE]; - virtio_read(pte->blockno, tmp_sec); + read_block(pte->blockno, tmp_sec, "Cannot read header"); header = (ComponentHeader *)tmp_sec; - IPL_assert(zipl_magic(tmp_sec), "zipl_run: zipl_magic"); - - IPL_assert(header->type == ZIPL_COMP_HEADER_IPL, - "zipl_run: wrong header type"); + IPL_assert(magic_match(tmp_sec, ZIPL_MAGIC), "No zIPL magic"); + IPL_assert(header->type == ZIPL_COMP_HEADER_IPL, "Bad header type"); dputs("start loading images\n"); @@ -164,17 +155,16 @@ static void zipl_run(ScsiBlockPtr *pte) entry++; IPL_assert((uint8_t *)(&entry[1]) <= (tmp_sec + MAX_SECTOR_SIZE), - "zipl_run: wrong entry size"); + "Wrong entry value"); } - IPL_assert(entry->component_type == ZIPL_COMP_ENTRY_EXEC, - "zipl_run: no EXEC entry"); + IPL_assert(entry->component_type == ZIPL_COMP_ENTRY_EXEC, "No EXEC entry"); /* should not return */ jump_to_IPL_code(entry->load_address); } -void zipl_load(void) +static void ipl_scsi(void) { ScsiMbr *mbr = (void *)sec; uint8_t *ns, *ns_end; @@ -182,20 +172,16 @@ void zipl_load(void) const int pte_len = sizeof(ScsiBlockPtr); ScsiBlockPtr *prog_table_entry; - /* Grab the MBR */ - read_block(0, mbr, "zipl_load: cannot read block 0"); - - dputs("checking magic\n"); - - IPL_assert(zipl_magic(mbr->magic), "zipl_load: zipl_magic 1"); + /* The 0-th block (MBR) was already read into sec[] */ + sclp_print("Using SCSI scheme.\n"); debug_print_int("program table", mbr->blockptr.blockno); /* Parse the program table */ read_block(mbr->blockptr.blockno, sec, - "zipl_load: cannot read program table"); + "Error reading Program Table"); - IPL_assert(zipl_magic(sec), "zipl_load: zipl_magic 2"); + IPL_assert(magic_match(sec, ZIPL_MAGIC), "No zIPL magic"); ns_end = sec + virtio_get_block_size(); for (ns = (sec + pte_len); (ns + pte_len) < ns_end; ns++) { @@ -209,7 +195,7 @@ void zipl_load(void) debug_print_int("program table entries", program_table_entries); - IPL_assert(program_table_entries, "zipl_load: no program table"); + IPL_assert(program_table_entries != 0, "Empty Program Table"); /* Run the default entry */ @@ -217,3 +203,24 @@ void zipl_load(void) zipl_run(prog_table_entry); /* no return */ } + +/*********************************************************************** + * IPL starts here + */ + +void zipl_load(void) +{ + ScsiMbr *mbr = (void *)sec; + + /* Grab the MBR */ + memset(sec, FREE_SPACE_FILLER, sizeof(sec)); + read_block(0, mbr, "Cannot read block 0"); + + dputs("checking magic\n"); + + if (magic_match(mbr->magic, ZIPL_MAGIC)) { + ipl_scsi(); /* no return */ + } + + virtio_panic("\n* invalid MBR magic *\n"); +}
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