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hv: mmio_dev: add hypercall to support mmio device pass through

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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>
This commit is contained in:
Li Fei1
2020-07-16 13:45:06 +08:00
committed by wenlingz
parent 5034087a4f
commit baf77a79ad
7 changed files with 184 additions and 0 deletions
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43
hypervisor/dm/mmio_dev.c Normal file
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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 <pgtable.h>
#include <vm.h>
#include <ept.h>
int32_t assign_mmio_dev(struct acrn_vm *vm, const struct acrn_mmiodev *mmiodev)
{
int32_t ret = -EINVAL;
if (mem_aligned_check(mmiodev->base_gpa, PAGE_SIZE) &&
mem_aligned_check(mmiodev->base_hpa, PAGE_SIZE) &&
mem_aligned_check(mmiodev->size, PAGE_SIZE)) {
ept_add_mr(vm, (uint64_t *)vm->arch_vm.nworld_eptp, mmiodev->base_hpa,
is_sos_vm(vm) ? mmiodev->base_hpa : mmiodev->base_gpa,
mmiodev->size, EPT_RWX | EPT_UNCACHED);
ret = 0;
}
return ret;
}
int32_t deassign_mmio_dev(struct acrn_vm *vm, const struct acrn_mmiodev *mmiodev)
{
int32_t ret = -EINVAL;
if (mem_aligned_check(mmiodev->base_gpa, PAGE_SIZE) &&
mem_aligned_check(mmiodev->base_hpa, PAGE_SIZE) &&
mem_aligned_check(mmiodev->size, PAGE_SIZE)) {
ept_del_mr(vm, (uint64_t *)vm->arch_vm.nworld_eptp,
is_sos_vm(vm) ? mmiodev->base_hpa : mmiodev->base_gpa, mmiodev->size);
ret = 0;
}
return ret;
}