mirror of
https://github.com/projectacrn/acrn-hypervisor.git
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ace4f48c9a
For data structure types "struct vcpu_arch", its name shall follow Naming convention. Naming convention rule:If the data structure type is used by multi modules, its corresponding logic resource is exposed to external components (such as SOS, UOS), and its name meaning is simplistic (such as vcpu, vm), its name needs prefix "acrn_". Variable name can be shortened from its data structure type name. The following udpates are made: struct vcpu_arch arch_vcpu-->struct acrn_vcpu_arch arch Tracked-On: #861 Signed-off-by: Xiangyang Wu <xiangyang.wu@linux.intel.com>
105 lines
2.4 KiB
C
105 lines
2.4 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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#define ACRN_DBG_TRUSTY_HYCALL 6U
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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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int32_t hcall_world_switch(struct acrn_vcpu *vcpu)
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{
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int32_t next_world_id = !(vcpu->arch.cur_context);
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if (next_world_id >= NR_WORLD) {
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dev_dbg(ACRN_DBG_TRUSTY_HYCALL,
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"%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.flag.supported == 0UL) {
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dev_dbg(ACRN_DBG_TRUSTY_HYCALL,
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"Secure World is not supported!\n");
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return -EPERM;
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}
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if (vcpu->vm->sworld_control.flag.active == 0UL) {
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dev_dbg(ACRN_DBG_TRUSTY_HYCALL,
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"Trusty is not initialized!\n");
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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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int32_t hcall_initialize_trusty(struct acrn_vcpu *vcpu, uint64_t param)
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{
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if (vcpu->vm->sworld_control.flag.supported == 0UL) {
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dev_dbg(ACRN_DBG_TRUSTY_HYCALL,
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"Secure World is not supported!\n");
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return -EPERM;
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}
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if (vcpu->vm->sworld_control.flag.active != 0UL) {
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dev_dbg(ACRN_DBG_TRUSTY_HYCALL,
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"Trusty already initialized!\n");
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return -EPERM;
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}
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if (vcpu->arch.cur_context != NORMAL_WORLD) {
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dev_dbg(ACRN_DBG_TRUSTY_HYCALL,
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"%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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}
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vcpu->vm->sworld_control.flag.active = 1UL;
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return 0;
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}
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int64_t hcall_save_restore_sworld_ctx(struct acrn_vcpu *vcpu)
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{
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struct vm *vm = vcpu->vm;
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if (vm->sworld_control.flag.supported == 0UL) {
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dev_dbg(ACRN_DBG_TRUSTY_HYCALL,
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"Secure World is not supported!\n");
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return -EPERM;
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}
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/* Currently, Secure World is only running on vCPU0 */
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if (!is_vcpu_bsp(vcpu)) {
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dev_dbg(ACRN_DBG_TRUSTY_HYCALL,
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"This hypercall is only allowed from vcpu0!");
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return -EPERM;
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}
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if (vm->sworld_control.flag.active != 0UL) {
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save_sworld_context(vcpu);
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vm->sworld_control.flag.ctx_saved = 1UL;
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} else {
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if (vm->sworld_control.flag.ctx_saved != 0UL) {
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restore_sworld_context(vcpu);
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vm->sworld_control.flag.ctx_saved = 0UL;
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vm->sworld_control.flag.active = 1UL;
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}
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}
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return 0;
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}
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