mirror of
https://github.com/projectacrn/acrn-hypervisor.git
synced 2025-05-14 03:14:46 +00:00
8b16be9185
Many of the license and Intel copyright headers include the "All rights reserved" string. It is not relevant in the context of the BSD-3-Clause license that the code is released under. This patch removes those strings throughout the code (hypervisor, devicemodel and misc). Tracked-On: #7254 Signed-off-by: Geoffroy Van Cutsem <geoffroy.vancutsem@intel.com>
110 lines
3.0 KiB
C
110 lines
3.0 KiB
C
/*
|
|
* Copyright (C) 2018 Intel Corporation.
|
|
*
|
|
* SPDX-License-Identifier: BSD-3-Clause
|
|
*/
|
|
|
|
#include <asm/guest/vm.h>
|
|
#include <hypercall.h>
|
|
#include <errno.h>
|
|
#include <logmsg.h>
|
|
|
|
|
|
/**
|
|
* @brief Switch vCPU state between Normal/Secure World.
|
|
*
|
|
* * The hypervisor uses this hypercall to do the world switch
|
|
* * The hypervisor needs to:
|
|
* * save current world vCPU contexts, and load the next world
|
|
* vCPU contexts
|
|
* * update ``rdi``, ``rsi``, ``rdx``, ``rbx`` to next world
|
|
* vCPU contexts
|
|
*
|
|
* @param vcpu Pointer to VCPU data structure
|
|
*
|
|
* @return 0 on success, non-zero on error.
|
|
*/
|
|
int32_t hcall_world_switch(struct acrn_vcpu *vcpu, __unused struct acrn_vm *target_vm,
|
|
__unused uint64_t param1, __unused uint64_t param2)
|
|
{
|
|
int32_t next_world_id = !(vcpu->arch.cur_context);
|
|
int32_t ret = -EPERM;
|
|
|
|
if ((vcpu->vm->sworld_control.flag.supported != 0UL) && (next_world_id < NR_WORLD)
|
|
&& (vcpu->vm->sworld_control.flag.active != 0UL)) {
|
|
switch_world(vcpu, next_world_id);
|
|
ret = 0;
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
/**
|
|
* @brief Initialize environment for Trusty-OS on a vCPU.
|
|
*
|
|
* * It is used by the User VM OS bootloader (``User VM OS Loader``) to request ACRN
|
|
* to initialize Trusty
|
|
* * The Trusty memory region range, entry point must be specified
|
|
* * The hypervisor needs to save current vCPU contexts (Normal World)
|
|
*
|
|
* @param vcpu Pointer to vCPU data structure
|
|
* @param param1 guest physical address. This gpa points to trusty_boot_param structure
|
|
*
|
|
* @return 0 on success, non-zero on error.
|
|
*/
|
|
int32_t hcall_initialize_trusty(struct acrn_vcpu *vcpu, __unused struct acrn_vm *target_vm,
|
|
uint64_t param1, __unused uint64_t param2)
|
|
{
|
|
int32_t ret = -EFAULT;
|
|
|
|
if ((vcpu->vm->sworld_control.flag.supported != 0UL)
|
|
&& (vcpu->vm->sworld_control.flag.active == 0UL)
|
|
&& (vcpu->arch.cur_context == NORMAL_WORLD)) {
|
|
struct trusty_boot_param boot_param;
|
|
|
|
if (copy_from_gpa(vcpu->vm, &boot_param, param1, sizeof(boot_param)) == 0) {
|
|
if (initialize_trusty(vcpu, &boot_param)) {
|
|
vcpu->vm->sworld_control.flag.active = 1UL;
|
|
ret = 0;
|
|
}
|
|
}
|
|
} else {
|
|
ret = -EPERM;
|
|
pr_err("%s, context mismatch when initialize trusty.\n", __func__);
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
/**
|
|
* @brief Save/Restore Context of Secure World.
|
|
*
|
|
* @param vcpu Pointer to VCPU data structure
|
|
*
|
|
* @return 0 on success, non-zero on error.
|
|
*/
|
|
int32_t hcall_save_restore_sworld_ctx(struct acrn_vcpu *vcpu, __unused struct acrn_vm *target_vm,
|
|
__unused uint64_t param1, __unused uint64_t param2)
|
|
{
|
|
struct acrn_vm *vm = vcpu->vm;
|
|
int32_t ret = -EINVAL;
|
|
|
|
if (is_vcpu_bsp(vcpu) && (vm->sworld_control.flag.supported != 0UL)) {
|
|
if (vm->sworld_control.flag.active != 0UL) {
|
|
save_sworld_context(vcpu);
|
|
vm->sworld_control.flag.ctx_saved = 1UL;
|
|
ret = 0;
|
|
} else {
|
|
if (vm->sworld_control.flag.ctx_saved != 0UL) {
|
|
restore_sworld_context(vcpu);
|
|
vm->sworld_control.flag.ctx_saved = 0UL;
|
|
vm->sworld_control.flag.active = 1UL;
|
|
ret = 0;
|
|
}
|
|
}
|
|
} else {
|
|
ret = -EPERM;
|
|
pr_err("%s, states mismatch when save restore sworld context.\n", __func__);
|
|
}
|
|
|
|
return ret;
|
|
}
|