acrn-hypervisor/hypervisor/common/trusty_hypercall.c

77 lines
2.5 KiB
C

/*
* Copyright (C) 2018 Intel Corporation. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
* * Neither the name of Intel Corporation nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include <hypervisor.h>
#include <hypercall.h>
int64_t hcall_world_switch(struct vcpu *vcpu)
{
int next_world_id = !(vcpu->arch_vcpu.cur_context);
if (!vcpu->vm->sworld_control.sworld_enabled) {
pr_err("Secure World is not enabled!\n");
return -1;
}
if (!vcpu->vm->arch_vm.sworld_eptp) {
pr_err("Trusty is not initialized!\n");
return -1;
}
ASSERT(next_world_id < NR_WORLD,
"world_id exceed max number of Worlds");
switch_world(vcpu, next_world_id);
return 0;
}
int64_t hcall_initialize_trusty(struct vcpu *vcpu, uint64_t param)
{
if (!vcpu->vm->sworld_control.sworld_enabled) {
pr_err("Secure World is not enabled!\n");
return -1;
}
if (vcpu->vm->arch_vm.sworld_eptp) {
pr_err("Trusty already initialized!\n");
return -1;
}
ASSERT(vcpu->arch_vcpu.cur_context == NORMAL_WORLD,
"The Trusty Initialize hypercall must be from Normal World");
if (!initialize_trusty(vcpu, param)) {
pr_err("Failed to initialize trusty!\n");
return -1;
}
return 0;
}