acrn-hypervisor/hypervisor/dm/mmio_dev.c

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/*
* Copyright (C) 2020 Intel Corporation. All rights reserved.
*
* SPDX-License-Identifier: BSD-3-Clause
*/
#include <errno.h>
#include <util.h>
#include <acrn_hv_defs.h>
#include <asm/pgtable.h>
#include <asm/guest/vm.h>
#include <asm/guest/ept.h>
#include <debug/logmsg.h>
int32_t assign_mmio_dev(struct acrn_vm *vm, const struct acrn_mmiodev *mmiodev)
{
int32_t i, ret = 0;
const struct acrn_mmiores *res;
for (i = 0; i < MMIODEV_RES_NUM; i++) {
res = &mmiodev->res[i];
if (mem_aligned_check(res->user_vm_pa, PAGE_SIZE) &&
mem_aligned_check(res->host_pa, PAGE_SIZE) &&
mem_aligned_check(res->size, PAGE_SIZE)) {
ept_add_mr(vm, (uint64_t *)vm->arch_vm.nworld_eptp, res->host_pa,
is_service_vm(vm) ? res->host_pa : res->user_vm_pa,
res->size, EPT_RWX | (res->mem_type & EPT_MT_MASK));
} else {
pr_err("%s invalid mmio res[%d] gpa:0x%lx hpa:0x%lx size:0x%lx",
__FUNCTION__, i, res->user_vm_pa, res->host_pa, res->size);
ret = -EINVAL;
break;
}
}
return ret;
}
int32_t deassign_mmio_dev(struct acrn_vm *vm, const struct acrn_mmiodev *mmiodev)
{
int32_t i, ret = 0;
uint64_t gpa;
const struct acrn_mmiores *res;
for (i = 0; i < MMIODEV_RES_NUM; i++) {
res = &mmiodev->res[i];
gpa = is_service_vm(vm) ? res->host_pa : res->user_vm_pa;
if (ept_is_valid_mr(vm, gpa, res->size)) {
if (mem_aligned_check(gpa, PAGE_SIZE) &&
mem_aligned_check(res->size, PAGE_SIZE)) {
ept_del_mr(vm, (uint64_t *)vm->arch_vm.nworld_eptp, gpa, res->size);
} else {
pr_err("%s invalid mmio res[%d] gpa:0x%lx hpa:0x%lx size:0x%lx",
__FUNCTION__, i, res->user_vm_pa, res->host_pa, res->size);
ret = -EINVAL;
break;
}
}
}
return ret;
}