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// Copyright 2019 The gVisor Authors.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
//go:build arm64
// +build arm64
package kvm
import (
"fmt"
"gvisor.dev/gvisor/pkg/abi/linux"
"gvisor.dev/gvisor/pkg/ring0"
"gvisor.dev/gvisor/pkg/sentry/arch"
)
type kvmOneReg struct {
id uint64
addr uint64
}
// arm64HypercallMMIOBase is MMIO base address used to dispatch hypercalls.
var arm64HypercallMMIOBase uintptr
const KVM_NR_SPSR = 5
type userFpsimdState struct {
vregs [64]uint64
fpsr uint32
fpcr uint32
reserved [2]uint32
}
type userRegs struct {
Regs arch.Registers
sp_el1 uint64
elr_el1 uint64
spsr [KVM_NR_SPSR]uint64
fpRegs userFpsimdState
}
type exception struct {
sErrPending uint8
sErrHasEsr uint8
extDabtPending uint8
pad [5]uint8
sErrEsr uint64
}
type kvmVcpuEvents struct {
exception
rsvd [12]uint32
}
// updateGlobalOnce does global initialization. It has to be called only once.
func updateGlobalOnce(fd int) error {
err := updateSystemValues(int(fd))
ring0.Init()
physicalInit()
// The linux.Task represents the possible largest task size, which the UserspaceSize shouldn't be larger than.
if linux.TaskSize < ring0.UserspaceSize {
return fmt.Errorf("gVisor doesn't support 3-level page tables on KVM platform. Try to recompile the kernel with CONFIG_ARM64_VA_BITS_48")
}
return err
}
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