126 lines
3.9 KiB
C
126 lines
3.9 KiB
C
/*
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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 "qemu/osdep.h"
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#include "qemu/units.h"
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#include "target/s390x/cpu.h"
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#include "hw/s390x/storage-keys.h"
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#define S390_SKEYS_BUFFER_SIZE (128 * KiB) /* Room for 128k storage keys */
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#define S390_SKEYS_SAVE_FLAG_EOS 0x01
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#define S390_SKEYS_SAVE_FLAG_SKEYS 0x02
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#define S390_SKEYS_SAVE_FLAG_ERROR 0x04
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static void s390_skeys_class_init(uc_engine *uc, S390SKeysClass* class);
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static void qemu_s390_skeys_class_init(uc_engine *uc, S390SKeysClass* skeyclass);
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static void s390_skeys_instance_init(uc_engine *uc, S390SKeysState* ss);
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static void qemu_s390_skeys_init(uc_engine *uc, QEMUS390SKeysState *skey);
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void s390_skeys_init(uc_engine *uc)
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{
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S390CPU *cpu = S390_CPU(uc->cpu);
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s390_skeys_class_init(uc, &cpu->skey);
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qemu_s390_skeys_class_init(uc, &cpu->skey);
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s390_skeys_instance_init(uc, (S390SKeysState*)&cpu->ss);
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qemu_s390_skeys_init(uc, &cpu->ss);
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cpu->ss.class = &cpu->skey;
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}
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static void qemu_s390_skeys_init(uc_engine *uc, QEMUS390SKeysState *skeys)
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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->ram_size / TARGET_PAGE_SIZE;
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// Unicorn: Allow users to configure this value?
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skeys->key_count = 0x20000000 / 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,
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// start_gfn, 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,
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// start_gfn, 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(uc_engine *uc, S390SKeysClass* skeyclass)
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{
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// S390SKeysClass *skeyclass = S390_SKEYS_CLASS(oc);
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// DeviceClass *dc = DEVICE_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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/* Reason: Internal device (only one skeys device for the whole memory) */
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// dc->user_creatable = false;
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}
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static void s390_skeys_instance_init(uc_engine *uc, S390SKeysState* ss)
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{
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ss->migration_enabled = true;
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}
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static void s390_skeys_class_init(uc_engine *uc, S390SKeysClass* class)
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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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