43 lines
1.0 KiB
Go
43 lines
1.0 KiB
Go
// Copyright 2019 The gVisor Authors.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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// +build arm64
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package kvm
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import (
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"fmt"
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"golang.org/x/sys/unix"
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)
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var (
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runDataSize int
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hasGuestPCID bool
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)
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func updateSystemValues(fd int) error {
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// Extract the mmap size.
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sz, _, errno := unix.RawSyscall(unix.SYS_IOCTL, uintptr(fd), _KVM_GET_VCPU_MMAP_SIZE, 0)
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if errno != 0 {
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return fmt.Errorf("getting VCPU mmap size: %v", errno)
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}
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// Save the data.
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runDataSize = int(sz)
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hasGuestPCID = true
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// Success.
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return nil
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}
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