KVM: ARM: Initial skeleton to compile KVM support
Targets KVM support for Cortex A-15 processors. Contains all the framework components, make files, header files, some tracing functionality, and basic user space API. Only supported core is Cortex-A15 for now. Most functionality is in arch/arm/kvm/* or arch/arm/include/asm/kvm_*.h. Reviewed-by: Will Deacon <will.deacon@arm.com> Reviewed-by: Marcelo Tosatti <mtosatti@redhat.com> Signed-off-by: Rusty Russell <rusty@rustcorp.com.au> Signed-off-by: Marc Zyngier <marc.zyngier@arm.com> Signed-off-by: Christoffer Dall <c.dall@virtualopensystems.com>
This commit is contained in:
Christoffer Dall
55
arch/arm/kvm/Kconfig
Normal file
55
arch/arm/kvm/Kconfig
Normal file
@@ -0,0 +1,55 @@
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#
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# KVM configuration
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#
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source "virt/kvm/Kconfig"
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menuconfig VIRTUALIZATION
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bool "Virtualization"
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---help---
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Say Y here to get to see options for using your Linux host to run
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other operating systems inside virtual machines (guests).
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This option alone does not add any kernel code.
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If you say N, all options in this submenu will be skipped and
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disabled.
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if VIRTUALIZATION
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config KVM
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bool "Kernel-based Virtual Machine (KVM) support"
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select PREEMPT_NOTIFIERS
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select ANON_INODES
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select KVM_MMIO
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select KVM_ARM_HOST
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depends on ARM_VIRT_EXT && ARM_LPAE
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---help---
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Support hosting virtualized guest machines. You will also
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need to select one or more of the processor modules below.
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This module provides access to the hardware capabilities through
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a character device node named /dev/kvm.
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If unsure, say N.
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config KVM_ARM_HOST
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bool "KVM host support for ARM cpus."
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depends on KVM
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depends on MMU
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---help---
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Provides host support for ARM processors.
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config KVM_ARM_MAX_VCPUS
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int "Number maximum supported virtual CPUs per VM"
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depends on KVM_ARM_HOST
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default 4
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help
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Static number of max supported virtual CPUs per VM.
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If you choose a high number, the vcpu structures will be quite
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large, so only choose a reasonable number that you expect to
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actually use.
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source drivers/virtio/Kconfig
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endif # VIRTUALIZATION
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21
arch/arm/kvm/Makefile
Normal file
21
arch/arm/kvm/Makefile
Normal file
@@ -0,0 +1,21 @@
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#
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# Makefile for Kernel-based Virtual Machine module
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#
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plus_virt := $(call as-instr,.arch_extension virt,+virt)
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ifeq ($(plus_virt),+virt)
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plus_virt_def := -DREQUIRES_VIRT=1
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endif
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ccflags-y += -Ivirt/kvm -Iarch/arm/kvm
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CFLAGS_arm.o := -I. $(plus_virt_def)
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CFLAGS_mmu.o := -I.
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AFLAGS_init.o := -Wa,-march=armv7-a$(plus_virt)
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AFLAGS_interrupts.o := -Wa,-march=armv7-a$(plus_virt)
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kvm-arm-y = $(addprefix ../../../virt/kvm/, kvm_main.o coalesced_mmio.o)
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obj-y += kvm-arm.o init.o interrupts.o
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obj-y += arm.o guest.o mmu.o emulate.o reset.o
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obj-y += coproc.o
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350
arch/arm/kvm/arm.c
Normal file
350
arch/arm/kvm/arm.c
Normal file
@@ -0,0 +1,350 @@
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/*
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* Copyright (C) 2012 - Virtual Open Systems and Columbia University
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* Author: Christoffer Dall <c.dall@virtualopensystems.com>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License, version 2, as
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* published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
|
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* along with this program; if not, write to the Free Software
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* Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*/
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#include <linux/errno.h>
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#include <linux/err.h>
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#include <linux/kvm_host.h>
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#include <linux/module.h>
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#include <linux/vmalloc.h>
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#include <linux/fs.h>
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#include <linux/mman.h>
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#include <linux/sched.h>
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#include <trace/events/kvm.h>
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#define CREATE_TRACE_POINTS
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#include "trace.h"
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#include <asm/unified.h>
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#include <asm/uaccess.h>
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#include <asm/ptrace.h>
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#include <asm/mman.h>
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#include <asm/cputype.h>
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#ifdef REQUIRES_VIRT
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__asm__(".arch_extension virt");
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#endif
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int kvm_arch_hardware_enable(void *garbage)
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{
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return 0;
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}
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int kvm_arch_vcpu_should_kick(struct kvm_vcpu *vcpu)
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{
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return kvm_vcpu_exiting_guest_mode(vcpu) == IN_GUEST_MODE;
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}
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void kvm_arch_hardware_disable(void *garbage)
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{
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}
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int kvm_arch_hardware_setup(void)
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{
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return 0;
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}
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void kvm_arch_hardware_unsetup(void)
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{
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}
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void kvm_arch_check_processor_compat(void *rtn)
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{
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*(int *)rtn = 0;
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}
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void kvm_arch_sync_events(struct kvm *kvm)
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{
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}
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int kvm_arch_init_vm(struct kvm *kvm, unsigned long type)
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{
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if (type)
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return -EINVAL;
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return 0;
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}
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int kvm_arch_vcpu_fault(struct kvm_vcpu *vcpu, struct vm_fault *vmf)
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{
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return VM_FAULT_SIGBUS;
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}
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void kvm_arch_free_memslot(struct kvm_memory_slot *free,
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struct kvm_memory_slot *dont)
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{
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}
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int kvm_arch_create_memslot(struct kvm_memory_slot *slot, unsigned long npages)
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{
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return 0;
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}
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void kvm_arch_destroy_vm(struct kvm *kvm)
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{
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int i;
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for (i = 0; i < KVM_MAX_VCPUS; ++i) {
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if (kvm->vcpus[i]) {
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kvm_arch_vcpu_free(kvm->vcpus[i]);
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kvm->vcpus[i] = NULL;
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}
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}
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}
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int kvm_dev_ioctl_check_extension(long ext)
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{
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int r;
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switch (ext) {
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case KVM_CAP_USER_MEMORY:
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case KVM_CAP_SYNC_MMU:
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case KVM_CAP_DESTROY_MEMORY_REGION_WORKS:
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case KVM_CAP_ONE_REG:
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r = 1;
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break;
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case KVM_CAP_COALESCED_MMIO:
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r = KVM_COALESCED_MMIO_PAGE_OFFSET;
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break;
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case KVM_CAP_NR_VCPUS:
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r = num_online_cpus();
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break;
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case KVM_CAP_MAX_VCPUS:
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r = KVM_MAX_VCPUS;
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break;
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default:
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r = 0;
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break;
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}
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return r;
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}
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long kvm_arch_dev_ioctl(struct file *filp,
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unsigned int ioctl, unsigned long arg)
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{
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return -EINVAL;
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}
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int kvm_arch_set_memory_region(struct kvm *kvm,
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struct kvm_userspace_memory_region *mem,
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struct kvm_memory_slot old,
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int user_alloc)
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{
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return 0;
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}
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int kvm_arch_prepare_memory_region(struct kvm *kvm,
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struct kvm_memory_slot *memslot,
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struct kvm_memory_slot old,
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struct kvm_userspace_memory_region *mem,
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int user_alloc)
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{
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return 0;
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}
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void kvm_arch_commit_memory_region(struct kvm *kvm,
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struct kvm_userspace_memory_region *mem,
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struct kvm_memory_slot old,
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int user_alloc)
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{
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}
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void kvm_arch_flush_shadow_all(struct kvm *kvm)
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{
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}
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void kvm_arch_flush_shadow_memslot(struct kvm *kvm,
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struct kvm_memory_slot *slot)
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{
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}
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struct kvm_vcpu *kvm_arch_vcpu_create(struct kvm *kvm, unsigned int id)
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{
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int err;
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struct kvm_vcpu *vcpu;
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vcpu = kmem_cache_zalloc(kvm_vcpu_cache, GFP_KERNEL);
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if (!vcpu) {
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err = -ENOMEM;
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goto out;
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}
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err = kvm_vcpu_init(vcpu, kvm, id);
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if (err)
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goto free_vcpu;
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return vcpu;
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free_vcpu:
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kmem_cache_free(kvm_vcpu_cache, vcpu);
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out:
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return ERR_PTR(err);
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}
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int kvm_arch_vcpu_postcreate(struct kvm_vcpu *vcpu)
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{
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return 0;
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}
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void kvm_arch_vcpu_free(struct kvm_vcpu *vcpu)
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{
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}
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void kvm_arch_vcpu_destroy(struct kvm_vcpu *vcpu)
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{
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kvm_arch_vcpu_free(vcpu);
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}
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int kvm_cpu_has_pending_timer(struct kvm_vcpu *vcpu)
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{
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return 0;
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}
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int __attribute_const__ kvm_target_cpu(void)
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{
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unsigned long implementor = read_cpuid_implementor();
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unsigned long part_number = read_cpuid_part_number();
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if (implementor != ARM_CPU_IMP_ARM)
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return -EINVAL;
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switch (part_number) {
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case ARM_CPU_PART_CORTEX_A15:
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return KVM_ARM_TARGET_CORTEX_A15;
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default:
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return -EINVAL;
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}
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}
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int kvm_arch_vcpu_init(struct kvm_vcpu *vcpu)
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{
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return 0;
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}
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void kvm_arch_vcpu_uninit(struct kvm_vcpu *vcpu)
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{
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}
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void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu)
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{
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}
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void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu)
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{
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}
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int kvm_arch_vcpu_ioctl_set_guest_debug(struct kvm_vcpu *vcpu,
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struct kvm_guest_debug *dbg)
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{
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return -EINVAL;
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||||
}
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int kvm_arch_vcpu_ioctl_get_mpstate(struct kvm_vcpu *vcpu,
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struct kvm_mp_state *mp_state)
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{
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return -EINVAL;
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||||
}
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int kvm_arch_vcpu_ioctl_set_mpstate(struct kvm_vcpu *vcpu,
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struct kvm_mp_state *mp_state)
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{
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return -EINVAL;
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}
|
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int kvm_arch_vcpu_runnable(struct kvm_vcpu *v)
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{
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return 0;
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}
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int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu, struct kvm_run *run)
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{
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return -EINVAL;
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}
|
||||
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||||
long kvm_arch_vcpu_ioctl(struct file *filp,
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unsigned int ioctl, unsigned long arg)
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||||
{
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||||
struct kvm_vcpu *vcpu = filp->private_data;
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||||
void __user *argp = (void __user *)arg;
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||||
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||||
switch (ioctl) {
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case KVM_ARM_VCPU_INIT: {
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struct kvm_vcpu_init init;
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||||
if (copy_from_user(&init, argp, sizeof(init)))
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return -EFAULT;
|
||||
|
||||
return kvm_vcpu_set_target(vcpu, &init);
|
||||
|
||||
}
|
||||
case KVM_SET_ONE_REG:
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||||
case KVM_GET_ONE_REG: {
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||||
struct kvm_one_reg reg;
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if (copy_from_user(®, argp, sizeof(reg)))
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return -EFAULT;
|
||||
if (ioctl == KVM_SET_ONE_REG)
|
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return kvm_arm_set_reg(vcpu, ®);
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else
|
||||
return kvm_arm_get_reg(vcpu, ®);
|
||||
}
|
||||
case KVM_GET_REG_LIST: {
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||||
struct kvm_reg_list __user *user_list = argp;
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struct kvm_reg_list reg_list;
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||||
unsigned n;
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||||
|
||||
if (copy_from_user(®_list, user_list, sizeof(reg_list)))
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||||
return -EFAULT;
|
||||
n = reg_list.n;
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||||
reg_list.n = kvm_arm_num_regs(vcpu);
|
||||
if (copy_to_user(user_list, ®_list, sizeof(reg_list)))
|
||||
return -EFAULT;
|
||||
if (n < reg_list.n)
|
||||
return -E2BIG;
|
||||
return kvm_arm_copy_reg_indices(vcpu, user_list->reg);
|
||||
}
|
||||
default:
|
||||
return -EINVAL;
|
||||
}
|
||||
}
|
||||
|
||||
int kvm_vm_ioctl_get_dirty_log(struct kvm *kvm, struct kvm_dirty_log *log)
|
||||
{
|
||||
return -EINVAL;
|
||||
}
|
||||
|
||||
long kvm_arch_vm_ioctl(struct file *filp,
|
||||
unsigned int ioctl, unsigned long arg)
|
||||
{
|
||||
return -EINVAL;
|
||||
}
|
||||
|
||||
int kvm_arch_init(void *opaque)
|
||||
{
|
||||
return 0;
|
||||
}
|
||||
|
||||
/* NOP: Compiling as a module not supported */
|
||||
void kvm_arch_exit(void)
|
||||
{
|
||||
}
|
||||
|
||||
static int arm_init(void)
|
||||
{
|
||||
int rc = kvm_init(NULL, sizeof(struct kvm_vcpu), 0, THIS_MODULE);
|
||||
return rc;
|
||||
}
|
||||
|
||||
module_init(arm_init);
|
||||
23
arch/arm/kvm/coproc.c
Normal file
23
arch/arm/kvm/coproc.c
Normal file
@@ -0,0 +1,23 @@
|
||||
/*
|
||||
* Copyright (C) 2012 - Virtual Open Systems and Columbia University
|
||||
* Authors: Rusty Russell <rusty@rustcorp.com.au>
|
||||
* Christoffer Dall <c.dall@virtualopensystems.com>
|
||||
*
|
||||
* This program is free software; you can redistribute it and/or modify
|
||||
* it under the terms of the GNU General Public License, version 2, as
|
||||
* published by the Free Software Foundation.
|
||||
*
|
||||
* This program is distributed in the hope that it will be useful,
|
||||
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||||
* GNU General Public License for more details.
|
||||
*
|
||||
* You should have received a copy of the GNU General Public License
|
||||
* along with this program; if not, write to the Free Software
|
||||
* Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
|
||||
*/
|
||||
#include <linux/kvm_host.h>
|
||||
|
||||
void kvm_reset_coprocs(struct kvm_vcpu *vcpu)
|
||||
{
|
||||
}
|
||||
155
arch/arm/kvm/emulate.c
Normal file
155
arch/arm/kvm/emulate.c
Normal file
@@ -0,0 +1,155 @@
|
||||
/*
|
||||
* Copyright (C) 2012 - Virtual Open Systems and Columbia University
|
||||
* Author: Christoffer Dall <c.dall@virtualopensystems.com>
|
||||
*
|
||||
* This program is free software; you can redistribute it and/or modify
|
||||
* it under the terms of the GNU General Public License, version 2, as
|
||||
* published by the Free Software Foundation.
|
||||
*
|
||||
* This program is distributed in the hope that it will be useful,
|
||||
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||||
* GNU General Public License for more details.
|
||||
*
|
||||
* You should have received a copy of the GNU General Public License
|
||||
* along with this program; if not, write to the Free Software
|
||||
* Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
|
||||
*/
|
||||
|
||||
#include <asm/kvm_emulate.h>
|
||||
|
||||
#define VCPU_NR_MODES 6
|
||||
#define VCPU_REG_OFFSET_USR 0
|
||||
#define VCPU_REG_OFFSET_FIQ 1
|
||||
#define VCPU_REG_OFFSET_IRQ 2
|
||||
#define VCPU_REG_OFFSET_SVC 3
|
||||
#define VCPU_REG_OFFSET_ABT 4
|
||||
#define VCPU_REG_OFFSET_UND 5
|
||||
#define REG_OFFSET(_reg) \
|
||||
(offsetof(struct kvm_regs, _reg) / sizeof(u32))
|
||||
|
||||
#define USR_REG_OFFSET(_num) REG_OFFSET(usr_regs.uregs[_num])
|
||||
|
||||
static const unsigned long vcpu_reg_offsets[VCPU_NR_MODES][15] = {
|
||||
/* USR/SYS Registers */
|
||||
[VCPU_REG_OFFSET_USR] = {
|
||||
USR_REG_OFFSET(0), USR_REG_OFFSET(1), USR_REG_OFFSET(2),
|
||||
USR_REG_OFFSET(3), USR_REG_OFFSET(4), USR_REG_OFFSET(5),
|
||||
USR_REG_OFFSET(6), USR_REG_OFFSET(7), USR_REG_OFFSET(8),
|
||||
USR_REG_OFFSET(9), USR_REG_OFFSET(10), USR_REG_OFFSET(11),
|
||||
USR_REG_OFFSET(12), USR_REG_OFFSET(13), USR_REG_OFFSET(14),
|
||||
},
|
||||
|
||||
/* FIQ Registers */
|
||||
[VCPU_REG_OFFSET_FIQ] = {
|
||||
USR_REG_OFFSET(0), USR_REG_OFFSET(1), USR_REG_OFFSET(2),
|
||||
USR_REG_OFFSET(3), USR_REG_OFFSET(4), USR_REG_OFFSET(5),
|
||||
USR_REG_OFFSET(6), USR_REG_OFFSET(7),
|
||||
REG_OFFSET(fiq_regs[0]), /* r8 */
|
||||
REG_OFFSET(fiq_regs[1]), /* r9 */
|
||||
REG_OFFSET(fiq_regs[2]), /* r10 */
|
||||
REG_OFFSET(fiq_regs[3]), /* r11 */
|
||||
REG_OFFSET(fiq_regs[4]), /* r12 */
|
||||
REG_OFFSET(fiq_regs[5]), /* r13 */
|
||||
REG_OFFSET(fiq_regs[6]), /* r14 */
|
||||
},
|
||||
|
||||
/* IRQ Registers */
|
||||
[VCPU_REG_OFFSET_IRQ] = {
|
||||
USR_REG_OFFSET(0), USR_REG_OFFSET(1), USR_REG_OFFSET(2),
|
||||
USR_REG_OFFSET(3), USR_REG_OFFSET(4), USR_REG_OFFSET(5),
|
||||
USR_REG_OFFSET(6), USR_REG_OFFSET(7), USR_REG_OFFSET(8),
|
||||
USR_REG_OFFSET(9), USR_REG_OFFSET(10), USR_REG_OFFSET(11),
|
||||
USR_REG_OFFSET(12),
|
||||
REG_OFFSET(irq_regs[0]), /* r13 */
|
||||
REG_OFFSET(irq_regs[1]), /* r14 */
|
||||
},
|
||||
|
||||
/* SVC Registers */
|
||||
[VCPU_REG_OFFSET_SVC] = {
|
||||
USR_REG_OFFSET(0), USR_REG_OFFSET(1), USR_REG_OFFSET(2),
|
||||
USR_REG_OFFSET(3), USR_REG_OFFSET(4), USR_REG_OFFSET(5),
|
||||
USR_REG_OFFSET(6), USR_REG_OFFSET(7), USR_REG_OFFSET(8),
|
||||
USR_REG_OFFSET(9), USR_REG_OFFSET(10), USR_REG_OFFSET(11),
|
||||
USR_REG_OFFSET(12),
|
||||
REG_OFFSET(svc_regs[0]), /* r13 */
|
||||
REG_OFFSET(svc_regs[1]), /* r14 */
|
||||
},
|
||||
|
||||
/* ABT Registers */
|
||||
[VCPU_REG_OFFSET_ABT] = {
|
||||
USR_REG_OFFSET(0), USR_REG_OFFSET(1), USR_REG_OFFSET(2),
|
||||
USR_REG_OFFSET(3), USR_REG_OFFSET(4), USR_REG_OFFSET(5),
|
||||
USR_REG_OFFSET(6), USR_REG_OFFSET(7), USR_REG_OFFSET(8),
|
||||
USR_REG_OFFSET(9), USR_REG_OFFSET(10), USR_REG_OFFSET(11),
|
||||
USR_REG_OFFSET(12),
|
||||
REG_OFFSET(abt_regs[0]), /* r13 */
|
||||
REG_OFFSET(abt_regs[1]), /* r14 */
|
||||
},
|
||||
|
||||
/* UND Registers */
|
||||
[VCPU_REG_OFFSET_UND] = {
|
||||
USR_REG_OFFSET(0), USR_REG_OFFSET(1), USR_REG_OFFSET(2),
|
||||
USR_REG_OFFSET(3), USR_REG_OFFSET(4), USR_REG_OFFSET(5),
|
||||
USR_REG_OFFSET(6), USR_REG_OFFSET(7), USR_REG_OFFSET(8),
|
||||
USR_REG_OFFSET(9), USR_REG_OFFSET(10), USR_REG_OFFSET(11),
|
||||
USR_REG_OFFSET(12),
|
||||
REG_OFFSET(und_regs[0]), /* r13 */
|
||||
REG_OFFSET(und_regs[1]), /* r14 */
|
||||
},
|
||||
};
|
||||
|
||||
/*
|
||||
* Return a pointer to the register number valid in the current mode of
|
||||
* the virtual CPU.
|
||||
*/
|
||||
u32 *vcpu_reg(struct kvm_vcpu *vcpu, u8 reg_num)
|
||||
{
|
||||
u32 *reg_array = (u32 *)&vcpu->arch.regs;
|
||||
u32 mode = *vcpu_cpsr(vcpu) & MODE_MASK;
|
||||
|
||||
switch (mode) {
|
||||
case USR_MODE...SVC_MODE:
|
||||
mode &= ~MODE32_BIT; /* 0 ... 3 */
|
||||
break;
|
||||
|
||||
case ABT_MODE:
|
||||
mode = VCPU_REG_OFFSET_ABT;
|
||||
break;
|
||||
|
||||
case UND_MODE:
|
||||
mode = VCPU_REG_OFFSET_UND;
|
||||
break;
|
||||
|
||||
case SYSTEM_MODE:
|
||||
mode = VCPU_REG_OFFSET_USR;
|
||||
break;
|
||||
|
||||
default:
|
||||
BUG();
|
||||
}
|
||||
|
||||
return reg_array + vcpu_reg_offsets[mode][reg_num];
|
||||
}
|
||||
|
||||
/*
|
||||
* Return the SPSR for the current mode of the virtual CPU.
|
||||
*/
|
||||
u32 *vcpu_spsr(struct kvm_vcpu *vcpu)
|
||||
{
|
||||
u32 mode = *vcpu_cpsr(vcpu) & MODE_MASK;
|
||||
switch (mode) {
|
||||
case SVC_MODE:
|
||||
return &vcpu->arch.regs.KVM_ARM_SVC_spsr;
|
||||
case ABT_MODE:
|
||||
return &vcpu->arch.regs.KVM_ARM_ABT_spsr;
|
||||
case UND_MODE:
|
||||
return &vcpu->arch.regs.KVM_ARM_UND_spsr;
|
||||
case IRQ_MODE:
|
||||
return &vcpu->arch.regs.KVM_ARM_IRQ_spsr;
|
||||
case FIQ_MODE:
|
||||
return &vcpu->arch.regs.KVM_ARM_FIQ_spsr;
|
||||
default:
|
||||
BUG();
|
||||
}
|
||||
}
|
||||
221
arch/arm/kvm/guest.c
Normal file
221
arch/arm/kvm/guest.c
Normal file
@@ -0,0 +1,221 @@
|
||||
/*
|
||||
* Copyright (C) 2012 - Virtual Open Systems and Columbia University
|
||||
* Author: Christoffer Dall <c.dall@virtualopensystems.com>
|
||||
*
|
||||
* This program is free software; you can redistribute it and/or modify
|
||||
* it under the terms of the GNU General Public License, version 2, as
|
||||
* published by the Free Software Foundation.
|
||||
*
|
||||
* This program is distributed in the hope that it will be useful,
|
||||
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||||
* GNU General Public License for more details.
|
||||
*
|
||||
* You should have received a copy of the GNU General Public License
|
||||
* along with this program; if not, write to the Free Software
|
||||
* Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
|
||||
*/
|
||||
|
||||
#include <linux/errno.h>
|
||||
#include <linux/err.h>
|
||||
#include <linux/kvm_host.h>
|
||||
#include <linux/module.h>
|
||||
#include <linux/vmalloc.h>
|
||||
#include <linux/fs.h>
|
||||
#include <asm/uaccess.h>
|
||||
#include <asm/kvm.h>
|
||||
#include <asm/kvm_asm.h>
|
||||
#include <asm/kvm_emulate.h>
|
||||
|
||||
#define VM_STAT(x) { #x, offsetof(struct kvm, stat.x), KVM_STAT_VM }
|
||||
#define VCPU_STAT(x) { #x, offsetof(struct kvm_vcpu, stat.x), KVM_STAT_VCPU }
|
||||
|
||||
struct kvm_stats_debugfs_item debugfs_entries[] = {
|
||||
{ NULL }
|
||||
};
|
||||
|
||||
int kvm_arch_vcpu_setup(struct kvm_vcpu *vcpu)
|
||||
{
|
||||
return 0;
|
||||
}
|
||||
|
||||
static u64 core_reg_offset_from_id(u64 id)
|
||||
{
|
||||
return id & ~(KVM_REG_ARCH_MASK | KVM_REG_SIZE_MASK | KVM_REG_ARM_CORE);
|
||||
}
|
||||
|
||||
static int get_core_reg(struct kvm_vcpu *vcpu, const struct kvm_one_reg *reg)
|
||||
{
|
||||
u32 __user *uaddr = (u32 __user *)(long)reg->addr;
|
||||
struct kvm_regs *regs = &vcpu->arch.regs;
|
||||
u64 off;
|
||||
|
||||
if (KVM_REG_SIZE(reg->id) != 4)
|
||||
return -ENOENT;
|
||||
|
||||
/* Our ID is an index into the kvm_regs struct. */
|
||||
off = core_reg_offset_from_id(reg->id);
|
||||
if (off >= sizeof(*regs) / KVM_REG_SIZE(reg->id))
|
||||
return -ENOENT;
|
||||
|
||||
return put_user(((u32 *)regs)[off], uaddr);
|
||||
}
|
||||
|
||||
static int set_core_reg(struct kvm_vcpu *vcpu, const struct kvm_one_reg *reg)
|
||||
{
|
||||
u32 __user *uaddr = (u32 __user *)(long)reg->addr;
|
||||
struct kvm_regs *regs = &vcpu->arch.regs;
|
||||
u64 off, val;
|
||||
|
||||
if (KVM_REG_SIZE(reg->id) != 4)
|
||||
return -ENOENT;
|
||||
|
||||
/* Our ID is an index into the kvm_regs struct. */
|
||||
off = core_reg_offset_from_id(reg->id);
|
||||
if (off >= sizeof(*regs) / KVM_REG_SIZE(reg->id))
|
||||
return -ENOENT;
|
||||
|
||||
if (get_user(val, uaddr) != 0)
|
||||
return -EFAULT;
|
||||
|
||||
if (off == KVM_REG_ARM_CORE_REG(usr_regs.ARM_cpsr)) {
|
||||
unsigned long mode = val & MODE_MASK;
|
||||
switch (mode) {
|
||||
case USR_MODE:
|
||||
case FIQ_MODE:
|
||||
case IRQ_MODE:
|
||||
case SVC_MODE:
|
||||
case ABT_MODE:
|
||||
case UND_MODE:
|
||||
break;
|
||||
default:
|
||||
return -EINVAL;
|
||||
}
|
||||
}
|
||||
|
||||
((u32 *)regs)[off] = val;
|
||||
return 0;
|
||||
}
|
||||
|
||||
int kvm_arch_vcpu_ioctl_get_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs)
|
||||
{
|
||||
return -EINVAL;
|
||||
}
|
||||
|
||||
int kvm_arch_vcpu_ioctl_set_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs)
|
||||
{
|
||||
return -EINVAL;
|
||||
}
|
||||
|
||||
static unsigned long num_core_regs(void)
|
||||
{
|
||||
return sizeof(struct kvm_regs) / sizeof(u32);
|
||||
}
|
||||
|
||||
/**
|
||||
* kvm_arm_num_regs - how many registers do we present via KVM_GET_ONE_REG
|
||||
*
|
||||
* This is for all registers.
|
||||
*/
|
||||
unsigned long kvm_arm_num_regs(struct kvm_vcpu *vcpu)
|
||||
{
|
||||
return num_core_regs();
|
||||
}
|
||||
|
||||
/**
|
||||
* kvm_arm_copy_reg_indices - get indices of all registers.
|
||||
*
|
||||
* We do core registers right here, then we apppend coproc regs.
|
||||
*/
|
||||
int kvm_arm_copy_reg_indices(struct kvm_vcpu *vcpu, u64 __user *uindices)
|
||||
{
|
||||
unsigned int i;
|
||||
const u64 core_reg = KVM_REG_ARM | KVM_REG_SIZE_U32 | KVM_REG_ARM_CORE;
|
||||
|
||||
for (i = 0; i < sizeof(struct kvm_regs)/sizeof(u32); i++) {
|
||||
if (put_user(core_reg | i, uindices))
|
||||
return -EFAULT;
|
||||
uindices++;
|
||||
}
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
int kvm_arm_get_reg(struct kvm_vcpu *vcpu, const struct kvm_one_reg *reg)
|
||||
{
|
||||
/* We currently use nothing arch-specific in upper 32 bits */
|
||||
if ((reg->id & ~KVM_REG_SIZE_MASK) >> 32 != KVM_REG_ARM >> 32)
|
||||
return -EINVAL;
|
||||
|
||||
/* Register group 16 means we want a core register. */
|
||||
if ((reg->id & KVM_REG_ARM_COPROC_MASK) == KVM_REG_ARM_CORE)
|
||||
return get_core_reg(vcpu, reg);
|
||||
|
||||
return -EINVAL;
|
||||
}
|
||||
|
||||
int kvm_arm_set_reg(struct kvm_vcpu *vcpu, const struct kvm_one_reg *reg)
|
||||
{
|
||||
/* We currently use nothing arch-specific in upper 32 bits */
|
||||
if ((reg->id & ~KVM_REG_SIZE_MASK) >> 32 != KVM_REG_ARM >> 32)
|
||||
return -EINVAL;
|
||||
|
||||
/* Register group 16 means we set a core register. */
|
||||
if ((reg->id & KVM_REG_ARM_COPROC_MASK) == KVM_REG_ARM_CORE)
|
||||
return set_core_reg(vcpu, reg);
|
||||
|
||||
return -EINVAL;
|
||||
}
|
||||
|
||||
int kvm_arch_vcpu_ioctl_get_sregs(struct kvm_vcpu *vcpu,
|
||||
struct kvm_sregs *sregs)
|
||||
{
|
||||
return -EINVAL;
|
||||
}
|
||||
|
||||
int kvm_arch_vcpu_ioctl_set_sregs(struct kvm_vcpu *vcpu,
|
||||
struct kvm_sregs *sregs)
|
||||
{
|
||||
return -EINVAL;
|
||||
}
|
||||
|
||||
int kvm_vcpu_set_target(struct kvm_vcpu *vcpu,
|
||||
const struct kvm_vcpu_init *init)
|
||||
{
|
||||
unsigned int i;
|
||||
|
||||
/* We can only do a cortex A15 for now. */
|
||||
if (init->target != kvm_target_cpu())
|
||||
return -EINVAL;
|
||||
|
||||
vcpu->arch.target = init->target;
|
||||
bitmap_zero(vcpu->arch.features, KVM_VCPU_MAX_FEATURES);
|
||||
|
||||
/* -ENOENT for unknown features, -EINVAL for invalid combinations. */
|
||||
for (i = 0; i < sizeof(init->features) * 8; i++) {
|
||||
if (test_bit(i, (void *)init->features)) {
|
||||
if (i >= KVM_VCPU_MAX_FEATURES)
|
||||
return -ENOENT;
|
||||
set_bit(i, vcpu->arch.features);
|
||||
}
|
||||
}
|
||||
|
||||
/* Now we know what it is, we can reset it. */
|
||||
return kvm_reset_vcpu(vcpu);
|
||||
}
|
||||
|
||||
int kvm_arch_vcpu_ioctl_get_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu)
|
||||
{
|
||||
return -EINVAL;
|
||||
}
|
||||
|
||||
int kvm_arch_vcpu_ioctl_set_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu)
|
||||
{
|
||||
return -EINVAL;
|
||||
}
|
||||
|
||||
int kvm_arch_vcpu_ioctl_translate(struct kvm_vcpu *vcpu,
|
||||
struct kvm_translation *tr)
|
||||
{
|
||||
return -EINVAL;
|
||||
}
|
||||
19
arch/arm/kvm/init.S
Normal file
19
arch/arm/kvm/init.S
Normal file
@@ -0,0 +1,19 @@
|
||||
/*
|
||||
* Copyright (C) 2012 - Virtual Open Systems and Columbia University
|
||||
* Author: Christoffer Dall <c.dall@virtualopensystems.com>
|
||||
*
|
||||
* This program is free software; you can redistribute it and/or modify
|
||||
* it under the terms of the GNU General Public License, version 2, as
|
||||
* published by the Free Software Foundation.
|
||||
*
|
||||
* This program is distributed in the hope that it will be useful,
|
||||
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||||
* GNU General Public License for more details.
|
||||
*
|
||||
* You should have received a copy of the GNU General Public License
|
||||
* along with this program; if not, write to the Free Software
|
||||
* Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
|
||||
*/
|
||||
#include <asm/asm-offsets.h>
|
||||
#include <asm/kvm_asm.h>
|
||||
19
arch/arm/kvm/interrupts.S
Normal file
19
arch/arm/kvm/interrupts.S
Normal file
@@ -0,0 +1,19 @@
|
||||
/*
|
||||
* Copyright (C) 2012 - Virtual Open Systems and Columbia University
|
||||
* Author: Christoffer Dall <c.dall@virtualopensystems.com>
|
||||
*
|
||||
* This program is free software; you can redistribute it and/or modify
|
||||
* it under the terms of the GNU General Public License, version 2, as
|
||||
* published by the Free Software Foundation.
|
||||
*
|
||||
* This program is distributed in the hope that it will be useful,
|
||||
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||||
* GNU General Public License for more details.
|
||||
*
|
||||
* You should have received a copy of the GNU General Public License
|
||||
* along with this program; if not, write to the Free Software
|
||||
* Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
|
||||
*/
|
||||
#include <asm/asm-offsets.h>
|
||||
#include <asm/kvm_asm.h>
|
||||
17
arch/arm/kvm/mmu.c
Normal file
17
arch/arm/kvm/mmu.c
Normal file
@@ -0,0 +1,17 @@
|
||||
/*
|
||||
* Copyright (C) 2012 - Virtual Open Systems and Columbia University
|
||||
* Author: Christoffer Dall <c.dall@virtualopensystems.com>
|
||||
*
|
||||
* This program is free software; you can redistribute it and/or modify
|
||||
* it under the terms of the GNU General Public License, version 2, as
|
||||
* published by the Free Software Foundation.
|
||||
*
|
||||
* This program is distributed in the hope that it will be useful,
|
||||
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||||
* GNU General Public License for more details.
|
||||
*
|
||||
* You should have received a copy of the GNU General Public License
|
||||
* along with this program; if not, write to the Free Software
|
||||
* Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
|
||||
*/
|
||||
74
arch/arm/kvm/reset.c
Normal file
74
arch/arm/kvm/reset.c
Normal file
@@ -0,0 +1,74 @@
|
||||
/*
|
||||
* Copyright (C) 2012 - Virtual Open Systems and Columbia University
|
||||
* Author: Christoffer Dall <c.dall@virtualopensystems.com>
|
||||
*
|
||||
* This program is free software; you can redistribute it and/or modify
|
||||
* it under the terms of the GNU General Public License, version 2, as
|
||||
* published by the Free Software Foundation.
|
||||
*
|
||||
* This program is distributed in the hope that it will be useful,
|
||||
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||||
* GNU General Public License for more details.
|
||||
*
|
||||
* You should have received a copy of the GNU General Public License
|
||||
* along with this program; if not, write to the Free Software
|
||||
* Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
|
||||
*/
|
||||
#include <linux/compiler.h>
|
||||
#include <linux/errno.h>
|
||||
#include <linux/sched.h>
|
||||
#include <linux/kvm_host.h>
|
||||
#include <linux/kvm.h>
|
||||
|
||||
#include <asm/unified.h>
|
||||
#include <asm/ptrace.h>
|
||||
#include <asm/cputype.h>
|
||||
#include <asm/kvm_arm.h>
|
||||
#include <asm/kvm_coproc.h>
|
||||
|
||||
/******************************************************************************
|
||||
* Cortex-A15 Reset Values
|
||||
*/
|
||||
|
||||
static const int a15_max_cpu_idx = 3;
|
||||
|
||||
static struct kvm_regs a15_regs_reset = {
|
||||
.usr_regs.ARM_cpsr = SVC_MODE | PSR_A_BIT | PSR_I_BIT | PSR_F_BIT,
|
||||
};
|
||||
|
||||
|
||||
/*******************************************************************************
|
||||
* Exported reset function
|
||||
*/
|
||||
|
||||
/**
|
||||
* kvm_reset_vcpu - sets core registers and cp15 registers to reset value
|
||||
* @vcpu: The VCPU pointer
|
||||
*
|
||||
* This function finds the right table above and sets the registers on the
|
||||
* virtual CPU struct to their architectually defined reset values.
|
||||
*/
|
||||
int kvm_reset_vcpu(struct kvm_vcpu *vcpu)
|
||||
{
|
||||
struct kvm_regs *cpu_reset;
|
||||
|
||||
switch (vcpu->arch.target) {
|
||||
case KVM_ARM_TARGET_CORTEX_A15:
|
||||
if (vcpu->vcpu_id > a15_max_cpu_idx)
|
||||
return -EINVAL;
|
||||
cpu_reset = &a15_regs_reset;
|
||||
vcpu->arch.midr = read_cpuid_id();
|
||||
break;
|
||||
default:
|
||||
return -ENODEV;
|
||||
}
|
||||
|
||||
/* Reset core registers */
|
||||
memcpy(&vcpu->arch.regs, cpu_reset, sizeof(vcpu->arch.regs));
|
||||
|
||||
/* Reset CP15 registers */
|
||||
kvm_reset_coprocs(vcpu);
|
||||
|
||||
return 0;
|
||||
}
|
||||
52
arch/arm/kvm/trace.h
Normal file
52
arch/arm/kvm/trace.h
Normal file
@@ -0,0 +1,52 @@
|
||||
#if !defined(_TRACE_KVM_H) || defined(TRACE_HEADER_MULTI_READ)
|
||||
#define _TRACE_KVM_H
|
||||
|
||||
#include <linux/tracepoint.h>
|
||||
|
||||
#undef TRACE_SYSTEM
|
||||
#define TRACE_SYSTEM kvm
|
||||
|
||||
/*
|
||||
* Tracepoints for entry/exit to guest
|
||||
*/
|
||||
TRACE_EVENT(kvm_entry,
|
||||
TP_PROTO(unsigned long vcpu_pc),
|
||||
TP_ARGS(vcpu_pc),
|
||||
|
||||
TP_STRUCT__entry(
|
||||
__field( unsigned long, vcpu_pc )
|
||||
),
|
||||
|
||||
TP_fast_assign(
|
||||
__entry->vcpu_pc = vcpu_pc;
|
||||
),
|
||||
|
||||
TP_printk("PC: 0x%08lx", __entry->vcpu_pc)
|
||||
);
|
||||
|
||||
TRACE_EVENT(kvm_exit,
|
||||
TP_PROTO(unsigned long vcpu_pc),
|
||||
TP_ARGS(vcpu_pc),
|
||||
|
||||
TP_STRUCT__entry(
|
||||
__field( unsigned long, vcpu_pc )
|
||||
),
|
||||
|
||||
TP_fast_assign(
|
||||
__entry->vcpu_pc = vcpu_pc;
|
||||
),
|
||||
|
||||
TP_printk("PC: 0x%08lx", __entry->vcpu_pc)
|
||||
);
|
||||
|
||||
|
||||
|
||||
#endif /* _TRACE_KVM_H */
|
||||
|
||||
#undef TRACE_INCLUDE_PATH
|
||||
#define TRACE_INCLUDE_PATH arch/arm/kvm
|
||||
#undef TRACE_INCLUDE_FILE
|
||||
#define TRACE_INCLUDE_FILE trace
|
||||
|
||||
/* This part must be outside protection */
|
||||
#include <trace/define_trace.h>
|
||||
Reference in New Issue
Block a user