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s390x: Info skeys sub-command

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Provide an  info skeys hmp sub-command to allow the end user to dump a storage
key for a given address. This is useful for guest operating system developers.

Reviewed-by: Thomas Huth <thuth@linux.vnet.ibm.com>
Reviewed-by: David Hildenbrand <dahi@linux.vnet.ibm.com>
Signed-off-by: Jason J. Herne <jjherne@linux.vnet.ibm.com>
Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com>
This commit is contained in:
Jason J. Herne 2015-06-26 14:10:16 -04:00 committed by Cornelia Huck
parent a4538a5cc5
commit a08f0081c9
4 changed files with 36 additions and 0 deletions
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2
hmp-commands.hx
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@ -1806,6 +1806,8 @@ show roms
show the TPM device
@item info memory-devices
show the memory devices
@item info skeys
Display the value of a storage key (s390 only)
@end table
ETEXI

23
hw/s390x/s390-skeys.c
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@ -66,6 +66,29 @@ static void write_keys(QEMUFile *f, uint8_t *keys, uint64_t startgfn,
}
}
void hmp_info_skeys(Monitor *mon, const QDict *qdict)
{
S390SKeysState *ss = s390_get_skeys_device();
S390SKeysClass *skeyclass = S390_SKEYS_GET_CLASS(ss);
uint64_t addr = qdict_get_int(qdict, "addr");
uint8_t key;
int r;
/* Quick check to see if guest is using storage keys*/
if (!skeyclass->skeys_enabled(ss)) {
monitor_printf(mon, "Error: This guest is not using storage keys\n");
return;
}
r = skeyclass->get_skeys(ss, addr / TARGET_PAGE_SIZE, 1, &key);
if (r < 0) {
monitor_printf(mon, "Error: %s\n", strerror(-r));
return;
}
monitor_printf(mon, " key: 0x%X\n", key);
}
void hmp_dump_skeys(Monitor *mon, const QDict *qdict)
{
const char *filename = qdict_get_str(qdict, "filename");

2
include/hw/s390x/storage-keys.h
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@ -54,4 +54,6 @@ void s390_skeys_init(void);
S390SKeysState *s390_get_skeys_device(void);
void hmp_dump_skeys(Monitor *mon, const QDict *qdict);
void hmp_info_skeys(Monitor *mon, const QDict *qdict);
#endif /* __S390_STORAGE_KEYS_H */

9
monitor.c
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@ -2881,6 +2881,15 @@ static mon_cmd_t info_cmds[] = {
.help = "Show rocker OF-DPA groups",
.mhandler.cmd = hmp_rocker_of_dpa_groups,
},
#if defined(TARGET_S390X)
{
.name = "skeys",
.args_type = "addr:l",
.params = "address",
.help = "Display the value of a storage key",
.mhandler.cmd = hmp_info_skeys,
},
#endif
{
.name = NULL,
},