gvisor.dev/gvisor@v0.0.0-20240520182842-f9d4d51c7e0f/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 //go:build arm64 16 // +build arm64 17 18 package kvm 19 20 import ( 21 "fmt" 22 23 "gvisor.dev/gvisor/pkg/abi/linux" 24 "gvisor.dev/gvisor/pkg/ring0" 25 "gvisor.dev/gvisor/pkg/sentry/arch" 26 ) 27 28 type kvmOneReg struct { 29 id uint64 30 addr uint64 31 } 32 33 // arm64HypercallMMIOBase is MMIO base address used to dispatch hypercalls. 34 var arm64HypercallMMIOBase uintptr 35 36 const KVM_NR_SPSR = 5 37 38 type userFpsimdState struct { 39 vregs [64]uint64 40 fpsr uint32 41 fpcr uint32 42 reserved [2]uint32 43 } 44 45 type userRegs struct { 46 Regs arch.Registers 47 sp_el1 uint64 48 elr_el1 uint64 49 spsr [KVM_NR_SPSR]uint64 50 fpRegs userFpsimdState 51 } 52 53 type exception struct { 54 sErrPending uint8 55 sErrHasEsr uint8 56 extDabtPending uint8 57 pad [5]uint8 58 sErrEsr uint64 59 } 60 61 type kvmVcpuEvents struct { 62 exception 63 rsvd [12]uint32 64 } 65 66 // updateGlobalOnce does global initialization. It has to be called only once. 67 func updateGlobalOnce(fd int) error { 68 err := updateSystemValues(int(fd)) 69 ring0.Init() 70 physicalInit() 71 // The linux.Task represents the possible largest task size, which the UserspaceSize shouldn't be larger than. 72 if linux.TaskSize < ring0.UserspaceSize { 73 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") 74 } 75 return err 76 }