github.com/SagerNet/gvisor@v0.0.0-20210707092255-7731c139d75c/pkg/sentry/platform/kvm/kvm_arm64.go (about)

     1  // Copyright 2019 The gVisor Authors.
     2  //
     3  // Licensed under the Apache License, Version 2.0 (the "License");
     4  // you may not use this file except in compliance with the License.
     5  // You may obtain a copy of the License at
     6  //
     7  //     http://www.apache.org/licenses/LICENSE-2.0
     8  //
     9  // Unless required by applicable law or agreed to in writing, software
    10  // distributed under the License is distributed on an "AS IS" BASIS,
    11  // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    12  // See the License for the specific language governing permissions and
    13  // limitations under the License.
    14  
    15  // +build arm64
    16  
    17  package kvm
    18  
    19  import (
    20  	"github.com/SagerNet/gvisor/pkg/ring0"
    21  	"github.com/SagerNet/gvisor/pkg/sentry/arch"
    22  )
    23  
    24  type kvmOneReg struct {
    25  	id   uint64
    26  	addr uint64
    27  }
    28  
    29  // arm64HypercallMMIOBase is MMIO base address used to dispatch hypercalls.
    30  var arm64HypercallMMIOBase uintptr
    31  
    32  const KVM_NR_SPSR = 5
    33  
    34  type userFpsimdState struct {
    35  	vregs    [64]uint64
    36  	fpsr     uint32
    37  	fpcr     uint32
    38  	reserved [2]uint32
    39  }
    40  
    41  type userRegs struct {
    42  	Regs    arch.Registers
    43  	sp_el1  uint64
    44  	elr_el1 uint64
    45  	spsr    [KVM_NR_SPSR]uint64
    46  	fpRegs  userFpsimdState
    47  }
    48  
    49  type exception struct {
    50  	sErrPending    uint8
    51  	sErrHasEsr     uint8
    52  	extDabtPending uint8
    53  	pad            [5]uint8
    54  	sErrEsr        uint64
    55  }
    56  
    57  type kvmVcpuEvents struct {
    58  	exception
    59  	rsvd [12]uint32
    60  }
    61  
    62  // updateGlobalOnce does global initialization. It has to be called only once.
    63  func updateGlobalOnce(fd int) error {
    64  	physicalInit()
    65  	err := updateSystemValues(int(fd))
    66  	ring0.Init()
    67  	return err
    68  }