static void jump_to_IPL_code(uint64_t address)
{
+ /* store the subsystem information _after_ the bootmap was loaded */
+ write_subsystem_identification();
/*
* The IPL PSW is at address 0. We also must not overwrite the
* content of non-BIOS memory after we loaded the guest, so we
char stack[PAGE_SIZE * 8] __attribute__((__aligned__(PAGE_SIZE)));
uint64_t boot_value;
+struct subchannel_id blk_schid = { .one = 1 };
+
+/*
+ * Priniciples of Operations (SA22-7832-09) chapter 17 requires that
+ * a subsystem-identification is at 184-187 and bytes 188-191 are zero
+ * after list-directed-IPL and ccw-IPL.
+ */
+void write_subsystem_identification(void)
+{
+ struct subchannel_id *schid = (struct subchannel_id *) 184;
+ uint32_t *zeroes = (uint32_t *) 188;
+
+ *schid = blk_schid;
+ *zeroes = 0;
+}
+
void virtio_panic(const char *string)
{
static void virtio_setup(uint64_t dev_info)
{
- struct subchannel_id blk_schid = { .one = 1 };
struct schib schib;
int i;
int r;