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https://github.com/projectacrn/acrn-hypervisor.git
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baf77a79ad
Add two hypercalls to support MMIO device pass through for post-launched VM. And when we support MMIO pass through for pre-launched VM, we could re-use the code in mmio_dev.c Tracked-On: #5053 Signed-off-by: Li Fei1 <fei1.li@intel.com>
44 lines
1.1 KiB
C
44 lines
1.1 KiB
C
/*
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* Copyright (C) 2020 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 <errno.h>
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#include <util.h>
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#include <acrn_hv_defs.h>
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#include <pgtable.h>
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#include <vm.h>
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#include <ept.h>
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int32_t assign_mmio_dev(struct acrn_vm *vm, const struct acrn_mmiodev *mmiodev)
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{
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int32_t ret = -EINVAL;
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if (mem_aligned_check(mmiodev->base_gpa, PAGE_SIZE) &&
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mem_aligned_check(mmiodev->base_hpa, PAGE_SIZE) &&
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mem_aligned_check(mmiodev->size, PAGE_SIZE)) {
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ept_add_mr(vm, (uint64_t *)vm->arch_vm.nworld_eptp, mmiodev->base_hpa,
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is_sos_vm(vm) ? mmiodev->base_hpa : mmiodev->base_gpa,
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mmiodev->size, EPT_RWX | EPT_UNCACHED);
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ret = 0;
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}
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return ret;
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}
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int32_t deassign_mmio_dev(struct acrn_vm *vm, const struct acrn_mmiodev *mmiodev)
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{
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int32_t ret = -EINVAL;
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if (mem_aligned_check(mmiodev->base_gpa, PAGE_SIZE) &&
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mem_aligned_check(mmiodev->base_hpa, PAGE_SIZE) &&
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mem_aligned_check(mmiodev->size, PAGE_SIZE)) {
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ept_del_mr(vm, (uint64_t *)vm->arch_vm.nworld_eptp,
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is_sos_vm(vm) ? mmiodev->base_hpa : mmiodev->base_gpa, mmiodev->size);
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ret = 0;
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}
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return ret;
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}
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