diff --git a/MAINTAINERS b/MAINTAINERS index 08f356a54c..5a4bac8895 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -569,6 +569,7 @@ F: hw/s390x/css.[hc] F: hw/s390x/sclp*.[hc] F: hw/s390x/ipl*.[hc] F: hw/s390x/*pci*.[hc] +F: hw/s390x/s390-skeys*.c F: include/hw/s390x/ F: pc-bios/s390-ccw/ T: git git://github.com/cohuck/qemu virtio-ccw-upstr diff --git a/hw/s390x/Makefile.objs b/hw/s390x/Makefile.objs index 27cd75a932..527d75400a 100644 --- a/hw/s390x/Makefile.objs +++ b/hw/s390x/Makefile.objs @@ -9,3 +9,5 @@ obj-y += css.o obj-y += s390-virtio-ccw.o obj-y += virtio-ccw.o obj-y += s390-pci-bus.o s390-pci-inst.o +obj-y += s390-skeys.o +obj-$(CONFIG_KVM) += s390-skeys-kvm.o diff --git a/hw/s390x/s390-skeys-kvm.c b/hw/s390x/s390-skeys-kvm.c new file mode 100644 index 0000000000..682949afb2 --- /dev/null +++ b/hw/s390x/s390-skeys-kvm.c @@ -0,0 +1,75 @@ +/* + * s390 storage key device + * + * Copyright 2015 IBM Corp. + * Author(s): Jason J. Herne + * + * 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 "hw/s390x/storage-keys.h" +#include "sysemu/kvm.h" +#include "qemu/error-report.h" + +static int kvm_s390_skeys_enabled(S390SKeysState *ss) +{ + S390SKeysClass *skeyclass = S390_SKEYS_GET_CLASS(ss); + uint8_t single_key; + int r; + + r = skeyclass->get_skeys(ss, 0, 1, &single_key); + if (r != 0 && r != KVM_S390_GET_SKEYS_NONE) { + error_report("S390_GET_KEYS error %d\n", r); + } + return (r == 0); +} + +static int kvm_s390_skeys_get(S390SKeysState *ss, uint64_t start_gfn, + uint64_t count, uint8_t *keys) +{ + struct kvm_s390_skeys args = { + .start_gfn = start_gfn, + .count = count, + .skeydata_addr = (__u64)keys + }; + + return kvm_vm_ioctl(kvm_state, KVM_S390_GET_SKEYS, &args); +} + +static int kvm_s390_skeys_set(S390SKeysState *ss, uint64_t start_gfn, + uint64_t count, uint8_t *keys) +{ + struct kvm_s390_skeys args = { + .start_gfn = start_gfn, + .count = count, + .skeydata_addr = (__u64)keys + }; + + return kvm_vm_ioctl(kvm_state, KVM_S390_SET_SKEYS, &args); +} + +static void kvm_s390_skeys_class_init(ObjectClass *oc, void *data) +{ + S390SKeysClass *skeyclass = S390_SKEYS_CLASS(oc); + + skeyclass->skeys_enabled = kvm_s390_skeys_enabled; + skeyclass->get_skeys = kvm_s390_skeys_get; + skeyclass->set_skeys = kvm_s390_skeys_set; +} + +static const TypeInfo kvm_s390_skeys_info = { + .name = TYPE_KVM_S390_SKEYS, + .parent = TYPE_S390_SKEYS, + .instance_size = sizeof(S390SKeysState), + .class_init = kvm_s390_skeys_class_init, + .class_size = sizeof(S390SKeysClass), +}; + +static void kvm_s390_skeys_register_types(void) +{ + type_register_static(&kvm_s390_skeys_info); +} + +type_init(kvm_s390_skeys_register_types) diff --git a/hw/s390x/s390-skeys.c b/hw/s390x/s390-skeys.c new file mode 100644 index 0000000000..77c42ff3c8 --- /dev/null +++ b/hw/s390x/s390-skeys.c @@ -0,0 +1,141 @@ +/* + * s390 storage key device + * + * Copyright 2015 IBM Corp. + * Author(s): Jason J. Herne + * + * 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 "hw/boards.h" +#include "hw/s390x/storage-keys.h" +#include "qemu/error-report.h" + +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 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 "\n", 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 "\n", 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, + .instance_size = sizeof(S390SKeysClass), +}; + +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_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) diff --git a/include/hw/s390x/storage-keys.h b/include/hw/s390x/storage-keys.h new file mode 100644 index 0000000000..cfd7da79a4 --- /dev/null +++ b/include/hw/s390x/storage-keys.h @@ -0,0 +1,55 @@ +/* + * s390 storage key device + * + * Copyright 2015 IBM Corp. + * Author(s): Jason J. Herne + * + * 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. + */ + +#ifndef __S390_STORAGE_KEYS_H +#define __S390_STORAGE_KEYS_H + +#include + +#define TYPE_S390_SKEYS "s390-skeys" +#define S390_SKEYS(obj) \ + OBJECT_CHECK(S390SKeysState, (obj), TYPE_S390_SKEYS) + +typedef struct S390SKeysState { + DeviceState parent_obj; + +} S390SKeysState; + +#define S390_SKEYS_CLASS(klass) \ + OBJECT_CLASS_CHECK(S390SKeysClass, (klass), TYPE_S390_SKEYS) +#define S390_SKEYS_GET_CLASS(obj) \ + OBJECT_GET_CLASS(S390SKeysClass, (obj), TYPE_S390_SKEYS) + +typedef struct S390SKeysClass { + DeviceClass parent_class; + int (*skeys_enabled)(S390SKeysState *ks); + int (*get_skeys)(S390SKeysState *ks, uint64_t start_gfn, uint64_t count, + uint8_t *keys); + int (*set_skeys)(S390SKeysState *ks, uint64_t start_gfn, uint64_t count, + uint8_t *keys); +} S390SKeysClass; + +#define TYPE_KVM_S390_SKEYS "s390-skeys-kvm" +#define TYPE_QEMU_S390_SKEYS "s390-skeys-qemu" +#define QEMU_S390_SKEYS(obj) \ + OBJECT_CHECK(QEMUS390SKeysState, (obj), TYPE_QEMU_S390_SKEYS) + +typedef struct QEMUS390SKeysState { + S390SKeysState parent_obj; + uint8_t *keydata; + uint32_t key_count; +} QEMUS390SKeysState; + +void s390_skeys_init(void); + +S390SKeysState *s390_get_skeys_device(void); + +#endif /* __S390_STORAGE_KEYS_H */