diff options
Diffstat (limited to 'qemu/hw/s390x/s390-skeys.c')
| -rw-r--r-- | qemu/hw/s390x/s390-skeys.c | 415 |
1 files changed, 0 insertions, 415 deletions
diff --git a/qemu/hw/s390x/s390-skeys.c b/qemu/hw/s390x/s390-skeys.c deleted file mode 100644 index 6528ffed1..000000000 --- a/qemu/hw/s390x/s390-skeys.c +++ /dev/null @@ -1,415 +0,0 @@ -/* - * s390 storage key device - * - * Copyright 2015 IBM Corp. - * Author(s): Jason J. Herne <jjherne@linux.vnet.ibm.com> - * - * This work is licensed under the terms of the GNU GPL, version 2 or (at - * your option) any later version. See the COPYING file in the top-level - * directory. - */ - -#include "qemu/osdep.h" -#include "hw/boards.h" -#include "qmp-commands.h" -#include "migration/qemu-file.h" -#include "hw/s390x/storage-keys.h" -#include "qemu/error-report.h" - -#define S390_SKEYS_BUFFER_SIZE 131072 /* Room for 128k storage keys */ -#define S390_SKEYS_SAVE_FLAG_EOS 0x01 -#define S390_SKEYS_SAVE_FLAG_SKEYS 0x02 -#define S390_SKEYS_SAVE_FLAG_ERROR 0x04 - -S390SKeysState *s390_get_skeys_device(void) -{ - S390SKeysState *ss; - - ss = S390_SKEYS(object_resolve_path_type("", TYPE_S390_SKEYS, NULL)); - assert(ss); - return ss; -} - -void s390_skeys_init(void) -{ - Object *obj; - - if (kvm_enabled()) { - obj = object_new(TYPE_KVM_S390_SKEYS); - } else { - obj = object_new(TYPE_QEMU_S390_SKEYS); - } - object_property_add_child(qdev_get_machine(), TYPE_S390_SKEYS, - obj, NULL); - object_unref(obj); - - qdev_init_nofail(DEVICE(obj)); -} - -static void write_keys(QEMUFile *f, uint8_t *keys, uint64_t startgfn, - uint64_t count, Error **errp) -{ - uint64_t curpage = startgfn; - uint64_t maxpage = curpage + count - 1; - const char *fmt = "page=%03" PRIx64 ": key(%d) => ACC=%X, FP=%d, REF=%d," - " ch=%d, reserved=%d\n"; - char buf[128]; - int len; - - for (; curpage <= maxpage; curpage++) { - uint8_t acc = (*keys & 0xF0) >> 4; - int fp = (*keys & 0x08); - int ref = (*keys & 0x04); - int ch = (*keys & 0x02); - int res = (*keys & 0x01); - - len = snprintf(buf, sizeof(buf), fmt, curpage, - *keys, acc, fp, ref, ch, res); - assert(len < sizeof(buf)); - qemu_put_buffer(f, (uint8_t *)buf, len); - keys++; - } -} - -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"); - Error *err = NULL; - - qmp_dump_skeys(filename, &err); - if (err) { - error_report_err(err); - } -} - -void qmp_dump_skeys(const char *filename, Error **errp) -{ - S390SKeysState *ss = s390_get_skeys_device(); - S390SKeysClass *skeyclass = S390_SKEYS_GET_CLASS(ss); - const uint64_t total_count = ram_size / TARGET_PAGE_SIZE; - uint64_t handled_count = 0, cur_count; - Error *lerr = NULL; - vaddr cur_gfn = 0; - uint8_t *buf; - int ret; - QEMUFile *f; - - /* Quick check to see if guest is using storage keys*/ - if (!skeyclass->skeys_enabled(ss)) { - error_setg(errp, "This guest is not using storage keys - " - "nothing to dump"); - return; - } - - f = qemu_fopen(filename, "wb"); - if (!f) { - error_setg_file_open(errp, errno, filename); - return; - } - - buf = g_try_malloc(S390_SKEYS_BUFFER_SIZE); - if (!buf) { - error_setg(errp, "Could not allocate memory"); - goto out; - } - - /* we'll only dump initial memory for now */ - while (handled_count < total_count) { - /* Calculate how many keys to ask for & handle overflow case */ - cur_count = MIN(total_count - handled_count, S390_SKEYS_BUFFER_SIZE); - - ret = skeyclass->get_skeys(ss, cur_gfn, cur_count, buf); - if (ret < 0) { - error_setg(errp, "get_keys error %d", ret); - goto out_free; - } - - /* write keys to stream */ - write_keys(f, buf, cur_gfn, cur_count, &lerr); - if (lerr) { - goto out_free; - } - - cur_gfn += cur_count; - handled_count += cur_count; - } - -out_free: - error_propagate(errp, lerr); - g_free(buf); -out: - qemu_fclose(f); -} - -static void qemu_s390_skeys_init(Object *obj) -{ - QEMUS390SKeysState *skeys = QEMU_S390_SKEYS(obj); - MachineState *machine = MACHINE(qdev_get_machine()); - - skeys->key_count = machine->maxram_size / TARGET_PAGE_SIZE; - skeys->keydata = g_malloc0(skeys->key_count); -} - -static int qemu_s390_skeys_enabled(S390SKeysState *ss) -{ - return 1; -} - -/* - * TODO: for memory hotplug support qemu_s390_skeys_set and qemu_s390_skeys_get - * will have to make sure that the given gfn belongs to a memory region and not - * a memory hole. - */ -static int qemu_s390_skeys_set(S390SKeysState *ss, uint64_t start_gfn, - uint64_t count, uint8_t *keys) -{ - QEMUS390SKeysState *skeydev = QEMU_S390_SKEYS(ss); - int i; - - /* Check for uint64 overflow and access beyond end of key data */ - if (start_gfn + count > skeydev->key_count || start_gfn + count < count) { - error_report("Error: Setting storage keys for page beyond the end " - "of memory: gfn=%" PRIx64 " count=%" PRId64, - start_gfn, count); - return -EINVAL; - } - - for (i = 0; i < count; i++) { - skeydev->keydata[start_gfn + i] = keys[i]; - } - return 0; -} - -static int qemu_s390_skeys_get(S390SKeysState *ss, uint64_t start_gfn, - uint64_t count, uint8_t *keys) -{ - QEMUS390SKeysState *skeydev = QEMU_S390_SKEYS(ss); - int i; - - /* Check for uint64 overflow and access beyond end of key data */ - if (start_gfn + count > skeydev->key_count || start_gfn + count < count) { - error_report("Error: Getting storage keys for page beyond the end " - "of memory: gfn=%" PRIx64 " count=%" PRId64, - start_gfn, count); - return -EINVAL; - } - - for (i = 0; i < count; i++) { - keys[i] = skeydev->keydata[start_gfn + i]; - } - return 0; -} - -static void qemu_s390_skeys_class_init(ObjectClass *oc, void *data) -{ - S390SKeysClass *skeyclass = S390_SKEYS_CLASS(oc); - - skeyclass->skeys_enabled = qemu_s390_skeys_enabled; - skeyclass->get_skeys = qemu_s390_skeys_get; - skeyclass->set_skeys = qemu_s390_skeys_set; -} - -static const TypeInfo qemu_s390_skeys_info = { - .name = TYPE_QEMU_S390_SKEYS, - .parent = TYPE_S390_SKEYS, - .instance_init = qemu_s390_skeys_init, - .instance_size = sizeof(QEMUS390SKeysState), - .class_init = qemu_s390_skeys_class_init, - .class_size = sizeof(S390SKeysClass), -}; - -static void s390_storage_keys_save(QEMUFile *f, void *opaque) -{ - S390SKeysState *ss = S390_SKEYS(opaque); - S390SKeysClass *skeyclass = S390_SKEYS_GET_CLASS(ss); - uint64_t pages_left = ram_size / TARGET_PAGE_SIZE; - uint64_t read_count, eos = S390_SKEYS_SAVE_FLAG_EOS; - vaddr cur_gfn = 0; - int error = 0; - uint8_t *buf; - - if (!skeyclass->skeys_enabled(ss)) { - goto end_stream; - } - - buf = g_try_malloc(S390_SKEYS_BUFFER_SIZE); - if (!buf) { - error_report("storage key save could not allocate memory"); - goto end_stream; - } - - /* We only support initial memory. Standby memory is not handled yet. */ - qemu_put_be64(f, (cur_gfn * TARGET_PAGE_SIZE) | S390_SKEYS_SAVE_FLAG_SKEYS); - qemu_put_be64(f, pages_left); - - while (pages_left) { - read_count = MIN(pages_left, S390_SKEYS_BUFFER_SIZE); - - if (!error) { - error = skeyclass->get_skeys(ss, cur_gfn, read_count, buf); - if (error) { - /* - * If error: we want to fill the stream with valid data instead - * of stopping early so we pad the stream with 0x00 values and - * use S390_SKEYS_SAVE_FLAG_ERROR to indicate failure to the - * reading side. - */ - error_report("S390_GET_KEYS error %d", error); - memset(buf, 0, S390_SKEYS_BUFFER_SIZE); - eos = S390_SKEYS_SAVE_FLAG_ERROR; - } - } - - qemu_put_buffer(f, buf, read_count); - cur_gfn += read_count; - pages_left -= read_count; - } - - g_free(buf); -end_stream: - qemu_put_be64(f, eos); -} - -static int s390_storage_keys_load(QEMUFile *f, void *opaque, int version_id) -{ - S390SKeysState *ss = S390_SKEYS(opaque); - S390SKeysClass *skeyclass = S390_SKEYS_GET_CLASS(ss); - int ret = 0; - - while (!ret) { - ram_addr_t addr; - int flags; - - addr = qemu_get_be64(f); - flags = addr & ~TARGET_PAGE_MASK; - addr &= TARGET_PAGE_MASK; - - switch (flags) { - case S390_SKEYS_SAVE_FLAG_SKEYS: { - const uint64_t total_count = qemu_get_be64(f); - uint64_t handled_count = 0, cur_count; - uint64_t cur_gfn = addr / TARGET_PAGE_SIZE; - uint8_t *buf = g_try_malloc(S390_SKEYS_BUFFER_SIZE); - - if (!buf) { - error_report("storage key load could not allocate memory"); - ret = -ENOMEM; - break; - } - - while (handled_count < total_count) { - cur_count = MIN(total_count - handled_count, - S390_SKEYS_BUFFER_SIZE); - qemu_get_buffer(f, buf, cur_count); - - ret = skeyclass->set_skeys(ss, cur_gfn, cur_count, buf); - if (ret < 0) { - error_report("S390_SET_KEYS error %d", ret); - break; - } - handled_count += cur_count; - cur_gfn += cur_count; - } - g_free(buf); - break; - } - case S390_SKEYS_SAVE_FLAG_ERROR: { - error_report("Storage key data is incomplete"); - ret = -EINVAL; - break; - } - case S390_SKEYS_SAVE_FLAG_EOS: - /* normal exit */ - return 0; - default: - error_report("Unexpected storage key flag data: %#x", flags); - ret = -EINVAL; - } - } - - return ret; -} - -static inline bool s390_skeys_get_migration_enabled(Object *obj, Error **errp) -{ - S390SKeysState *ss = S390_SKEYS(obj); - - return ss->migration_enabled; -} - -static inline void s390_skeys_set_migration_enabled(Object *obj, bool value, - Error **errp) -{ - S390SKeysState *ss = S390_SKEYS(obj); - - /* Prevent double registration of savevm handler */ - if (ss->migration_enabled == value) { - return; - } - - ss->migration_enabled = value; - - if (ss->migration_enabled) { - register_savevm(NULL, TYPE_S390_SKEYS, 0, 1, s390_storage_keys_save, - s390_storage_keys_load, ss); - } else { - unregister_savevm(DEVICE(ss), TYPE_S390_SKEYS, ss); - } -} - -static void s390_skeys_instance_init(Object *obj) -{ - object_property_add_bool(obj, "migration-enabled", - s390_skeys_get_migration_enabled, - s390_skeys_set_migration_enabled, NULL); - object_property_set_bool(obj, true, "migration-enabled", NULL); -} - -static void s390_skeys_class_init(ObjectClass *oc, void *data) -{ - DeviceClass *dc = DEVICE_CLASS(oc); - - dc->hotpluggable = false; - set_bit(DEVICE_CATEGORY_MISC, dc->categories); -} - -static const TypeInfo s390_skeys_info = { - .name = TYPE_S390_SKEYS, - .parent = TYPE_DEVICE, - .instance_init = s390_skeys_instance_init, - .instance_size = sizeof(S390SKeysState), - .class_init = s390_skeys_class_init, - .class_size = sizeof(S390SKeysClass), - .abstract = true, -}; - -static void qemu_s390_skeys_register_types(void) -{ - type_register_static(&s390_skeys_info); - type_register_static(&qemu_s390_skeys_info); -} - -type_init(qemu_s390_skeys_register_types) |