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s390x: Create QOM device for s390 storage keys
A new QOM style device is provided to back guest storage keys. A special version for KVM is created, which handles the storage key access via KVM_S390_GET_SKEYS and KVM_S390_SET_SKEYS ioctl. 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
Cornelia Huck
parent
84b48ad63b
commit
0efe406cac
@ -569,6 +569,7 @@ F: hw/s390x/css.[hc]
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F: hw/s390x/sclp*.[hc]
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F: hw/s390x/ipl*.[hc]
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F: hw/s390x/*pci*.[hc]
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F: hw/s390x/s390-skeys*.c
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F: include/hw/s390x/
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F: pc-bios/s390-ccw/
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T: git git://github.com/cohuck/qemu virtio-ccw-upstr
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@ -9,3 +9,5 @@ obj-y += css.o
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obj-y += s390-virtio-ccw.o
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obj-y += virtio-ccw.o
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obj-y += s390-pci-bus.o s390-pci-inst.o
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obj-y += s390-skeys.o
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obj-$(CONFIG_KVM) += s390-skeys-kvm.o
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75
hw/s390x/s390-skeys-kvm.c
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75
hw/s390x/s390-skeys-kvm.c
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@ -0,0 +1,75 @@
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/*
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* s390 storage key device
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*
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* Copyright 2015 IBM Corp.
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* Author(s): Jason J. Herne <jjherne@linux.vnet.ibm.com>
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*
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* This work is licensed under the terms of the GNU GPL, version 2 or (at
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* your option) any later version. See the COPYING file in the top-level
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* directory.
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*/
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#include "hw/s390x/storage-keys.h"
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#include "sysemu/kvm.h"
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#include "qemu/error-report.h"
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static int kvm_s390_skeys_enabled(S390SKeysState *ss)
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{
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S390SKeysClass *skeyclass = S390_SKEYS_GET_CLASS(ss);
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uint8_t single_key;
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int r;
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r = skeyclass->get_skeys(ss, 0, 1, &single_key);
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if (r != 0 && r != KVM_S390_GET_SKEYS_NONE) {
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error_report("S390_GET_KEYS error %d\n", r);
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}
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return (r == 0);
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}
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static int kvm_s390_skeys_get(S390SKeysState *ss, uint64_t start_gfn,
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uint64_t count, uint8_t *keys)
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{
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struct kvm_s390_skeys args = {
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.start_gfn = start_gfn,
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.count = count,
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.skeydata_addr = (__u64)keys
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};
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return kvm_vm_ioctl(kvm_state, KVM_S390_GET_SKEYS, &args);
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}
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static int kvm_s390_skeys_set(S390SKeysState *ss, uint64_t start_gfn,
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uint64_t count, uint8_t *keys)
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{
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struct kvm_s390_skeys args = {
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.start_gfn = start_gfn,
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.count = count,
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.skeydata_addr = (__u64)keys
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};
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return kvm_vm_ioctl(kvm_state, KVM_S390_SET_SKEYS, &args);
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}
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static void kvm_s390_skeys_class_init(ObjectClass *oc, void *data)
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{
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S390SKeysClass *skeyclass = S390_SKEYS_CLASS(oc);
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skeyclass->skeys_enabled = kvm_s390_skeys_enabled;
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skeyclass->get_skeys = kvm_s390_skeys_get;
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skeyclass->set_skeys = kvm_s390_skeys_set;
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}
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static const TypeInfo kvm_s390_skeys_info = {
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.name = TYPE_KVM_S390_SKEYS,
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.parent = TYPE_S390_SKEYS,
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.instance_size = sizeof(S390SKeysState),
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.class_init = kvm_s390_skeys_class_init,
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.class_size = sizeof(S390SKeysClass),
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};
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static void kvm_s390_skeys_register_types(void)
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{
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type_register_static(&kvm_s390_skeys_info);
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}
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type_init(kvm_s390_skeys_register_types)
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141
hw/s390x/s390-skeys.c
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141
hw/s390x/s390-skeys.c
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@ -0,0 +1,141 @@
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/*
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* s390 storage key device
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*
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* Copyright 2015 IBM Corp.
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* Author(s): Jason J. Herne <jjherne@linux.vnet.ibm.com>
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*
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* This work is licensed under the terms of the GNU GPL, version 2 or (at
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* your option) any later version. See the COPYING file in the top-level
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* directory.
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*/
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#include "hw/boards.h"
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#include "hw/s390x/storage-keys.h"
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#include "qemu/error-report.h"
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S390SKeysState *s390_get_skeys_device(void)
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{
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S390SKeysState *ss;
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ss = S390_SKEYS(object_resolve_path_type("", TYPE_S390_SKEYS, NULL));
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assert(ss);
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return ss;
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}
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void s390_skeys_init(void)
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{
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Object *obj;
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if (kvm_enabled()) {
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obj = object_new(TYPE_KVM_S390_SKEYS);
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} else {
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obj = object_new(TYPE_QEMU_S390_SKEYS);
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}
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object_property_add_child(qdev_get_machine(), TYPE_S390_SKEYS,
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obj, NULL);
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object_unref(obj);
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qdev_init_nofail(DEVICE(obj));
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}
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static void qemu_s390_skeys_init(Object *obj)
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{
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QEMUS390SKeysState *skeys = QEMU_S390_SKEYS(obj);
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MachineState *machine = MACHINE(qdev_get_machine());
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skeys->key_count = machine->maxram_size / TARGET_PAGE_SIZE;
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skeys->keydata = g_malloc0(skeys->key_count);
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}
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static int qemu_s390_skeys_enabled(S390SKeysState *ss)
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{
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return 1;
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}
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/*
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* TODO: for memory hotplug support qemu_s390_skeys_set and qemu_s390_skeys_get
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* will have to make sure that the given gfn belongs to a memory region and not
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* a memory hole.
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*/
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static int qemu_s390_skeys_set(S390SKeysState *ss, uint64_t start_gfn,
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uint64_t count, uint8_t *keys)
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{
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QEMUS390SKeysState *skeydev = QEMU_S390_SKEYS(ss);
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int i;
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/* Check for uint64 overflow and access beyond end of key data */
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if (start_gfn + count > skeydev->key_count || start_gfn + count < count) {
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error_report("Error: Setting storage keys for page beyond the end "
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"of memory. gfn=%" PRIx64 " count=%" PRId64 "\n", start_gfn,
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count);
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return -EINVAL;
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}
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for (i = 0; i < count; i++) {
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skeydev->keydata[start_gfn + i] = keys[i];
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}
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return 0;
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}
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static int qemu_s390_skeys_get(S390SKeysState *ss, uint64_t start_gfn,
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uint64_t count, uint8_t *keys)
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{
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QEMUS390SKeysState *skeydev = QEMU_S390_SKEYS(ss);
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int i;
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/* Check for uint64 overflow and access beyond end of key data */
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if (start_gfn + count > skeydev->key_count || start_gfn + count < count) {
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error_report("Error: Getting storage keys for page beyond the end "
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"of memory. gfn=%" PRIx64 " count=%" PRId64 "\n", start_gfn,
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count);
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return -EINVAL;
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}
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for (i = 0; i < count; i++) {
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keys[i] = skeydev->keydata[start_gfn + i];
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}
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return 0;
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}
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static void qemu_s390_skeys_class_init(ObjectClass *oc, void *data)
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{
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S390SKeysClass *skeyclass = S390_SKEYS_CLASS(oc);
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skeyclass->skeys_enabled = qemu_s390_skeys_enabled;
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skeyclass->get_skeys = qemu_s390_skeys_get;
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skeyclass->set_skeys = qemu_s390_skeys_set;
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}
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static const TypeInfo qemu_s390_skeys_info = {
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.name = TYPE_QEMU_S390_SKEYS,
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.parent = TYPE_S390_SKEYS,
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.instance_init = qemu_s390_skeys_init,
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.instance_size = sizeof(QEMUS390SKeysState),
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.class_init = qemu_s390_skeys_class_init,
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.instance_size = sizeof(S390SKeysClass),
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};
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static void s390_skeys_class_init(ObjectClass *oc, void *data)
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{
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DeviceClass *dc = DEVICE_CLASS(oc);
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dc->hotpluggable = false;
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set_bit(DEVICE_CATEGORY_MISC, dc->categories);
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}
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static const TypeInfo s390_skeys_info = {
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.name = TYPE_S390_SKEYS,
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.parent = TYPE_DEVICE,
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.instance_size = sizeof(S390SKeysState),
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.class_init = s390_skeys_class_init,
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.class_size = sizeof(S390SKeysClass),
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.abstract = true,
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};
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static void qemu_s390_skeys_register_types(void)
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{
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type_register_static(&s390_skeys_info);
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type_register_static(&qemu_s390_skeys_info);
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}
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type_init(qemu_s390_skeys_register_types)
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55
include/hw/s390x/storage-keys.h
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55
include/hw/s390x/storage-keys.h
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@ -0,0 +1,55 @@
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/*
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* s390 storage key device
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*
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* Copyright 2015 IBM Corp.
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* Author(s): Jason J. Herne <jjherne@linux.vnet.ibm.com>
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*
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* This work is licensed under the terms of the GNU GPL, version 2 or (at
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* your option) any later version. See the COPYING file in the top-level
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* directory.
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*/
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#ifndef __S390_STORAGE_KEYS_H
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#define __S390_STORAGE_KEYS_H
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#include <hw/qdev.h>
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#define TYPE_S390_SKEYS "s390-skeys"
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#define S390_SKEYS(obj) \
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OBJECT_CHECK(S390SKeysState, (obj), TYPE_S390_SKEYS)
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typedef struct S390SKeysState {
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DeviceState parent_obj;
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} S390SKeysState;
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#define S390_SKEYS_CLASS(klass) \
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OBJECT_CLASS_CHECK(S390SKeysClass, (klass), TYPE_S390_SKEYS)
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#define S390_SKEYS_GET_CLASS(obj) \
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OBJECT_GET_CLASS(S390SKeysClass, (obj), TYPE_S390_SKEYS)
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typedef struct S390SKeysClass {
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DeviceClass parent_class;
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int (*skeys_enabled)(S390SKeysState *ks);
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int (*get_skeys)(S390SKeysState *ks, uint64_t start_gfn, uint64_t count,
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uint8_t *keys);
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int (*set_skeys)(S390SKeysState *ks, uint64_t start_gfn, uint64_t count,
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uint8_t *keys);
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} S390SKeysClass;
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#define TYPE_KVM_S390_SKEYS "s390-skeys-kvm"
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#define TYPE_QEMU_S390_SKEYS "s390-skeys-qemu"
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#define QEMU_S390_SKEYS(obj) \
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OBJECT_CHECK(QEMUS390SKeysState, (obj), TYPE_QEMU_S390_SKEYS)
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typedef struct QEMUS390SKeysState {
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S390SKeysState parent_obj;
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uint8_t *keydata;
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uint32_t key_count;
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} QEMUS390SKeysState;
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void s390_skeys_init(void);
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S390SKeysState *s390_get_skeys_device(void);
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#endif /* __S390_STORAGE_KEYS_H */
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