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pc-bios/s390-ccw Really big EAV ECKD DASD handling

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For EAV ECKD DASD, the cylinder count will have the magic value
0xfffeU. Therefore, use the block number to test for valid eckd
addresses instead.

Signed-off-by: Eugene (jno) Dvurechenski <jno@linux.vnet.ibm.com>
Acked-by: Cornelia Huck <cornelia.huck@de.ibm.com>
Acked-by: Christian Borntraeger <borntraeger@de.ibm.com>
Reviewed-by: David Hildenbrand <dahi@linux.vnet.ibm.com>
Signed-off-by: Jens Freimann <jfrei@linux.vnet.ibm.com>
Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
This commit is contained in:
Eugene (jno) Dvurechenski 2014-08-29 11:01:39 +02:00 • committed by Christian Borntraeger
parent b0885f7599
commit f04db28b86
3 changed files with 25 additions and 25 deletions
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37
pc-bios/s390-ccw/bootmap.c
View file

@ -93,25 +93,6 @@ static inline void verify_boot_info(BootInfo *bip)
"Bad block size in zIPL section of the 1st record.");
}
static bool eckd_valid_address(BootMapPointer *p)
{
const uint64_t cylinder = p->eckd.cylinder
+ ((p->eckd.head & 0xfff0) << 12);
const uint64_t head = p->eckd.head & 0x000f;
if (head >= virtio_get_heads()
|| p->eckd.sector > virtio_get_sectors()
|| p->eckd.sector <= 0) {
return false;
}
if (!virtio_guessed_disk_nature() && cylinder >= virtio_get_cylinders()) {
return false;
}
return true;
}
static block_number_t eckd_block_num(BootMapPointer *p)
{
const uint64_t sectors = virtio_get_sectors();
@ -126,6 +107,24 @@ static block_number_t eckd_block_num(BootMapPointer *p)
return block;
}
static bool eckd_valid_address(BootMapPointer *p)
{
const uint64_t head = p->eckd.head & 0x000f;
if (head >= virtio_get_heads()
|| p->eckd.sector > virtio_get_sectors()
|| p->eckd.sector <= 0) {
return false;
}
if (!virtio_guessed_disk_nature() &&
eckd_block_num(p) >= virtio_get_blocks()) {
return false;
}
return true;
}
static block_number_t load_eckd_segments(block_number_t blk, uint64_t *address)
{
block_number_t block_nr;