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https://github.com/projectacrn/acrn-hypervisor.git
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b6c5e0efdd
Just return the errno to the caller. Signed-off-by: Li, Fei1 <fei1.li@intel.com> Reviewed-by: Kevin Tian <kevin.tian@intel.com>
81 lines
2.6 KiB
C
81 lines
2.6 KiB
C
/*
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* Copyright (C) 2018 Intel Corporation. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* * Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* * Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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* * Neither the name of Intel Corporation nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <hypervisor.h>
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#include <hypercall.h>
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int64_t hcall_world_switch(struct vcpu *vcpu)
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{
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int 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) {
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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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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) {
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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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