@@ -20,6 +20,7 @@
#include "qom/object.h"
#define DIAG308_FLAGS_LP_VALID 0x80
+#define MAX_IPLB_CHAIN 7 /* Max number of fallback boot devices */
void s390_ipl_convert_loadparm(char *ascii_lp, uint8_t *ebcdic_lp);
void s390_ipl_fmt_loadparm(uint8_t *loadparm, char *str, Error **errp);
@@ -31,7 +31,9 @@ struct QemuIplParameters {
uint8_t reserved1[3];
uint64_t reserved2;
uint32_t boot_menu_timeout;
- uint8_t reserved3[12];
+ uint8_t reserved3[2];
+ uint16_t chain_len;
+ uint64_t next_iplb;
} QEMU_PACKED;
typedef struct QemuIplParameters QemuIplParameters;
@@ -56,6 +56,13 @@ static bool iplb_extended_needed(void *opaque)
return ipl->iplbext_migration;
}
+/* Place the IPLB chain immediately before the BIOS in memory */
+static uint64_t find_iplb_chain_addr(uint64_t bios_addr, uint16_t count)
+{
+ return (bios_addr & TARGET_PAGE_MASK)
+ - (count * sizeof(IplParameterBlock));
+}
+
static const VMStateDescription vmstate_iplb_extended = {
.name = "ipl/iplb_extended",
.version_id = 0,
@@ -398,6 +405,17 @@ static CcwDevice *s390_get_ccw_device(DeviceState *dev_st, int *devtype)
return ccw_dev;
}
+static uint64_t s390_ipl_map_iplb_chain(IplParameterBlock *iplb_chain)
+{
+ S390IPLState *ipl = get_ipl_device();
+ uint16_t count = ipl->qipl.chain_len;
+ uint64_t len = sizeof(IplParameterBlock) * count;
+ uint64_t chain_addr = find_iplb_chain_addr(ipl->bios_start_addr, count);
+
+ cpu_physical_memory_write(chain_addr, iplb_chain, len);
+ return chain_addr;
+}
+
void s390_ipl_fmt_loadparm(uint8_t *loadparm, char *str, Error **errp)
{
int i;
@@ -428,54 +446,51 @@ void s390_ipl_convert_loadparm(char *ascii_lp, uint8_t *ebcdic_lp)
}
}
-static bool s390_gen_initial_iplb(S390IPLState *ipl)
+static bool s390_build_iplb(DeviceState *dev_st, IplParameterBlock *iplb)
{
- DeviceState *dev_st;
+ S390IPLState *ipl = get_ipl_device();
CcwDevice *ccw_dev = NULL;
SCSIDevice *sd;
int devtype;
uint8_t *lp;
- dev_st = get_boot_device(0);
- if (dev_st) {
- ccw_dev = s390_get_ccw_device(dev_st, &devtype);
- }
-
/*
* Currently allow IPL only from CCW devices.
*/
+ ccw_dev = s390_get_ccw_device(dev_st, &devtype);
if (ccw_dev) {
lp = ccw_dev->loadparm;
switch (devtype) {
case CCW_DEVTYPE_SCSI:
sd = SCSI_DEVICE(dev_st);
- ipl->iplb.len = cpu_to_be32(S390_IPLB_MIN_QEMU_SCSI_LEN);
- ipl->iplb.blk0_len =
+ iplb->len = cpu_to_be32(S390_IPLB_MIN_QEMU_SCSI_LEN);
+ iplb->blk0_len =
cpu_to_be32(S390_IPLB_MIN_QEMU_SCSI_LEN - S390_IPLB_HEADER_LEN);
- ipl->iplb.pbt = S390_IPL_TYPE_QEMU_SCSI;
- ipl->iplb.scsi.lun = cpu_to_be32(sd->lun);
- ipl->iplb.scsi.target = cpu_to_be16(sd->id);
- ipl->iplb.scsi.channel = cpu_to_be16(sd->channel);
- ipl->iplb.scsi.devno = cpu_to_be16(ccw_dev->sch->devno);
- ipl->iplb.scsi.ssid = ccw_dev->sch->ssid & 3;
+ iplb->pbt = S390_IPL_TYPE_QEMU_SCSI;
+ iplb->scsi.lun = cpu_to_be32(sd->lun);
+ iplb->scsi.target = cpu_to_be16(sd->id);
+ iplb->scsi.channel = cpu_to_be16(sd->channel);
+ iplb->scsi.devno = cpu_to_be16(ccw_dev->sch->devno);
+ iplb->scsi.ssid = ccw_dev->sch->ssid & 3;
break;
case CCW_DEVTYPE_VFIO:
- ipl->iplb.len = cpu_to_be32(S390_IPLB_MIN_CCW_LEN);
- ipl->iplb.pbt = S390_IPL_TYPE_CCW;
- ipl->iplb.ccw.devno = cpu_to_be16(ccw_dev->sch->devno);
- ipl->iplb.ccw.ssid = ccw_dev->sch->ssid & 3;
+ iplb->len = cpu_to_be32(S390_IPLB_MIN_CCW_LEN);
+ iplb->pbt = S390_IPL_TYPE_CCW;
+ iplb->ccw.devno = cpu_to_be16(ccw_dev->sch->devno);
+ iplb->ccw.ssid = ccw_dev->sch->ssid & 3;
break;
case CCW_DEVTYPE_VIRTIO_NET:
+ /* The S390IPLState netboot is true if ANY IPLB may use netboot */
ipl->netboot = true;
/* Fall through to CCW_DEVTYPE_VIRTIO case */
case CCW_DEVTYPE_VIRTIO:
- ipl->iplb.len = cpu_to_be32(S390_IPLB_MIN_CCW_LEN);
- ipl->iplb.blk0_len =
+ iplb->len = cpu_to_be32(S390_IPLB_MIN_CCW_LEN);
+ iplb->blk0_len =
cpu_to_be32(S390_IPLB_MIN_CCW_LEN - S390_IPLB_HEADER_LEN);
- ipl->iplb.pbt = S390_IPL_TYPE_CCW;
- ipl->iplb.ccw.devno = cpu_to_be16(ccw_dev->sch->devno);
- ipl->iplb.ccw.ssid = ccw_dev->sch->ssid & 3;
+ iplb->pbt = S390_IPL_TYPE_CCW;
+ iplb->ccw.devno = cpu_to_be16(ccw_dev->sch->devno);
+ iplb->ccw.ssid = ccw_dev->sch->ssid & 3;
break;
}
@@ -484,8 +499,8 @@ static bool s390_gen_initial_iplb(S390IPLState *ipl)
lp = S390_CCW_MACHINE(qdev_get_machine())->loadparm;
}
- s390_ipl_convert_loadparm((char *)lp, ipl->iplb.loadparm);
- ipl->iplb.flags |= DIAG308_FLAGS_LP_VALID;
+ s390_ipl_convert_loadparm((char *)lp, iplb->loadparm);
+ iplb->flags |= DIAG308_FLAGS_LP_VALID;
return true;
}
@@ -493,6 +508,58 @@ static bool s390_gen_initial_iplb(S390IPLState *ipl)
return false;
}
+static bool s390_init_all_iplbs(S390IPLState *ipl)
+{
+ int iplb_num = 0;
+ IplParameterBlock iplb_chain[7];
+ DeviceState *dev_st = get_boot_device(0);
+
+ /*
+ * Parse the boot devices. Generate an IPLB for the first boot device,
+ * which will later be set with DIAG308. Index any fallback boot devices.
+ */
+ if (!dev_st) {
+ ipl->qipl.chain_len = 0;
+ return false;
+ }
+
+ iplb_num = 1;
+ s390_build_iplb(dev_st, &ipl->iplb);
+ ipl->iplb.flags |= DIAG308_FLAGS_LP_VALID;
+
+ while (get_boot_device(iplb_num)) {
+ iplb_num++;
+ }
+
+ ipl->qipl.chain_len = iplb_num - 1;
+
+ /*
+ * Build fallback IPLBs for any boot devices above index 0, up to a
+ * maximum amount as defined in ipl.h
+ */
+ if (iplb_num > 1) {
+ if (iplb_num > MAX_IPLB_CHAIN + 1) {
+ warn_report("Excess boot devices defined! %d boot devices found, "
+ "but only the first %d will be considered.",
+ iplb_num, MAX_IPLB_CHAIN + 1);
+
+ ipl->qipl.chain_len = MAX_IPLB_CHAIN;
+ iplb_num = MAX_IPLB_CHAIN + 1;
+ }
+
+ /* Start at 1 because the IPLB for boot index 0 is not chained */
+ for (int i = 1; i < iplb_num; i++) {
+ dev_st = get_boot_device(i);
+ s390_build_iplb(dev_st, &iplb_chain[i - 1]);
+ iplb_chain[i - 1].flags |= DIAG308_FLAGS_LP_VALID;
+ }
+
+ ipl->qipl.next_iplb = s390_ipl_map_iplb_chain(iplb_chain);
+ }
+
+ return iplb_num;
+}
+
static bool is_virtio_ccw_device_of_type(IplParameterBlock *iplb,
int virtio_id)
{
@@ -620,7 +687,7 @@ void s390_ipl_reset_request(CPUState *cs, enum s390_reset reset_type)
* this is the original boot device's SCSI
* so restore IPL parameter info from it
*/
- ipl->iplb_valid = s390_gen_initial_iplb(ipl);
+ ipl->iplb_valid = s390_build_iplb(get_boot_device(0), &ipl->iplb);
}
}
if (reset_type == S390_RESET_MODIFIED_CLEAR ||
@@ -714,7 +781,9 @@ void s390_ipl_prepare_cpu(S390CPU *cpu)
if (!ipl->kernel || ipl->iplb_valid) {
cpu->env.psw.addr = ipl->bios_start_addr;
if (!ipl->iplb_valid) {
- ipl->iplb_valid = s390_gen_initial_iplb(ipl);
+ ipl->iplb_valid = s390_init_all_iplbs(ipl);
+ } else {
+ ipl->qipl.chain_len = 0;
}
}
s390_ipl_set_boot_menu(ipl);