63 lines
1.4 KiB
C
63 lines
1.4 KiB
C
/*
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* Copyright (C) 2018 Intel Corporation. All rights reserved.
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*
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* SPDX-License-Identifier: BSD-3-Clause
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*/
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#include <hypervisor.h>
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#include <hypercall.h>
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/* this hcall is only come from trusty enabled vcpu itself, and cannot be
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* called from other vcpus
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*/
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int64_t hcall_world_switch(struct vcpu *vcpu)
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{
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int32_t next_world_id = !(vcpu->arch_vcpu.cur_context);
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if (next_world_id >= NR_WORLD) {
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pr_err("%s world_id %d exceed max number of Worlds\n",
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__func__, next_world_id);
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return -EINVAL;
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}
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if (!vcpu->vm->sworld_control.sworld_enabled) {
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pr_err("%s, Secure World is not enabled!\n", __func__);
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return -EPERM;
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}
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if (vcpu->vm->arch_vm.sworld_eptp == 0U) {
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pr_err("%s, Trusty is not initialized!\n", __func__);
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return -EPERM;
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}
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switch_world(vcpu, next_world_id);
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return 0;
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}
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/* this hcall is only come from trusty enabled vcpu itself, and cannot be
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* called from other vcpus
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*/
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int64_t hcall_initialize_trusty(struct vcpu *vcpu, uint64_t param)
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{
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if (!vcpu->vm->sworld_control.sworld_enabled) {
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pr_err("%s, Secure World is not enabled!\n", __func__);
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return -EPERM;
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}
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if (vcpu->vm->arch_vm.sworld_eptp != 0U) {
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pr_err("%s, Trusty already initialized!\n", __func__);
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return -EPERM;
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}
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if (vcpu->arch_vcpu.cur_context != NORMAL_WORLD) {
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pr_err("%s, must initialize Trusty from Normal World!\n",
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__func__);
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return -EPERM;
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}
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if (!initialize_trusty(vcpu, param))
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return -ENODEV;
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return 0;
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}
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