2008-04-17 04:28:09 +00:00
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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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* Copyright IBM Corp. 2007
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*
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* Authors: Hollis Blanchard <hollisb@us.ibm.com>
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* Christian Ehrhardt <ehrhardt@linux.vnet.ibm.com>
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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 <asm/cputable.h>
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#include <asm/uaccess.h>
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#include <asm/kvm_ppc.h>
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2008-07-25 18:54:52 +00:00
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#include <asm/tlbflush.h>
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2008-04-17 04:28:09 +00:00
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gfn_t unalias_gfn(struct kvm *kvm, gfn_t gfn)
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{
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return gfn;
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}
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int kvm_cpu_has_interrupt(struct kvm_vcpu *v)
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{
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2008-04-25 22:55:49 +00:00
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return !!(v->arch.pending_exceptions);
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2008-04-17 04:28:09 +00:00
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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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2008-04-25 22:55:49 +00:00
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return !(v->arch.msr & MSR_WE);
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2008-04-17 04:28:09 +00:00
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}
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int kvmppc_emulate_mmio(struct kvm_run *run, struct kvm_vcpu *vcpu)
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{
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enum emulation_result er;
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int r;
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er = kvmppc_emulate_instruction(run, vcpu);
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switch (er) {
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case EMULATE_DONE:
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/* Future optimization: only reload non-volatiles if they were
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* actually modified. */
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r = RESUME_GUEST_NV;
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break;
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case EMULATE_DO_MMIO:
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run->exit_reason = KVM_EXIT_MMIO;
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/* We must reload nonvolatiles because "update" load/store
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* instructions modify register state. */
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/* Future optimization: only reload non-volatiles if they were
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* actually modified. */
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r = RESUME_HOST_NV;
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break;
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case EMULATE_FAIL:
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/* XXX Deliver Program interrupt to guest. */
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printk(KERN_EMERG "%s: emulation failed (%08x)\n", __func__,
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vcpu->arch.last_inst);
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r = RESUME_HOST;
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break;
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default:
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BUG();
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}
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return r;
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}
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void kvm_arch_hardware_enable(void *garbage)
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{
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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 r;
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if (strcmp(cur_cpu_spec->platform, "ppc440") == 0)
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r = 0;
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else
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r = -ENOTSUPP;
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*(int *)rtn = r;
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}
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struct kvm *kvm_arch_create_vm(void)
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{
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struct kvm *kvm;
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kvm = kzalloc(sizeof(struct kvm), GFP_KERNEL);
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if (!kvm)
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return ERR_PTR(-ENOMEM);
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return kvm;
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}
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static void kvmppc_free_vcpus(struct kvm *kvm)
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{
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unsigned 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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void kvm_arch_destroy_vm(struct kvm *kvm)
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{
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kvmppc_free_vcpus(kvm);
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kvm_free_physmem(kvm);
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kfree(kvm);
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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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r = 1;
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break;
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2008-05-30 14:05:56 +00:00
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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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2008-04-17 04:28:09 +00:00
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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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2008-07-10 23:49:31 +00:00
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void kvm_arch_flush_shadow(struct kvm *kvm)
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{
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}
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2008-04-17 04:28:09 +00:00
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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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struct kvm_vcpu *vcpu;
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int err;
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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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void kvm_arch_vcpu_free(struct kvm_vcpu *vcpu)
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{
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kvm_vcpu_uninit(vcpu);
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kmem_cache_free(kvm_vcpu_cache, vcpu);
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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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unsigned int priority = exception_priority[BOOKE_INTERRUPT_DECREMENTER];
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return test_bit(priority, &vcpu->arch.pending_exceptions);
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}
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static void kvmppc_decrementer_func(unsigned long data)
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{
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struct kvm_vcpu *vcpu = (struct kvm_vcpu *)data;
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kvmppc_queue_exception(vcpu, BOOKE_INTERRUPT_DECREMENTER);
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2008-04-25 22:55:49 +00:00
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if (waitqueue_active(&vcpu->wq)) {
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wake_up_interruptible(&vcpu->wq);
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vcpu->stat.halt_wakeup++;
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}
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2008-04-17 04:28:09 +00:00
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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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setup_timer(&vcpu->arch.dec_timer, kvmppc_decrementer_func,
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(unsigned long)vcpu);
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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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2008-07-25 18:54:49 +00:00
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/* Note: clearing MSR[DE] just means that the debug interrupt will not be
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* delivered *immediately*. Instead, it simply sets the appropriate DBSR bits.
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* If those DBSR bits are still set when MSR[DE] is re-enabled, the interrupt
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* will be delivered as an "imprecise debug event" (which is indicated by
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* DBSR[IDE].
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*/
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static void kvmppc_disable_debug_interrupts(void)
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{
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mtmsr(mfmsr() & ~MSR_DE);
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}
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static void kvmppc_restore_host_debug_state(struct kvm_vcpu *vcpu)
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{
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kvmppc_disable_debug_interrupts();
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mtspr(SPRN_IAC1, vcpu->arch.host_iac[0]);
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mtspr(SPRN_IAC2, vcpu->arch.host_iac[1]);
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mtspr(SPRN_IAC3, vcpu->arch.host_iac[2]);
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mtspr(SPRN_IAC4, vcpu->arch.host_iac[3]);
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mtspr(SPRN_DBCR1, vcpu->arch.host_dbcr1);
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mtspr(SPRN_DBCR2, vcpu->arch.host_dbcr2);
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mtspr(SPRN_DBCR0, vcpu->arch.host_dbcr0);
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mtmsr(vcpu->arch.host_msr);
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}
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static void kvmppc_load_guest_debug_registers(struct kvm_vcpu *vcpu)
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{
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struct kvm_guest_debug *dbg = &vcpu->guest_debug;
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u32 dbcr0 = 0;
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vcpu->arch.host_msr = mfmsr();
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kvmppc_disable_debug_interrupts();
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/* Save host debug register state. */
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vcpu->arch.host_iac[0] = mfspr(SPRN_IAC1);
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vcpu->arch.host_iac[1] = mfspr(SPRN_IAC2);
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vcpu->arch.host_iac[2] = mfspr(SPRN_IAC3);
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vcpu->arch.host_iac[3] = mfspr(SPRN_IAC4);
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vcpu->arch.host_dbcr0 = mfspr(SPRN_DBCR0);
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vcpu->arch.host_dbcr1 = mfspr(SPRN_DBCR1);
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vcpu->arch.host_dbcr2 = mfspr(SPRN_DBCR2);
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/* set registers up for guest */
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if (dbg->bp[0]) {
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mtspr(SPRN_IAC1, dbg->bp[0]);
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dbcr0 |= DBCR0_IAC1 | DBCR0_IDM;
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}
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if (dbg->bp[1]) {
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mtspr(SPRN_IAC2, dbg->bp[1]);
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dbcr0 |= DBCR0_IAC2 | DBCR0_IDM;
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}
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if (dbg->bp[2]) {
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mtspr(SPRN_IAC3, dbg->bp[2]);
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dbcr0 |= DBCR0_IAC3 | DBCR0_IDM;
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}
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if (dbg->bp[3]) {
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mtspr(SPRN_IAC4, dbg->bp[3]);
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dbcr0 |= DBCR0_IAC4 | DBCR0_IDM;
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}
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mtspr(SPRN_DBCR0, dbcr0);
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mtspr(SPRN_DBCR1, 0);
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mtspr(SPRN_DBCR2, 0);
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}
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2008-04-17 04:28:09 +00:00
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void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu)
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{
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2008-07-25 18:54:52 +00:00
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int i;
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2008-07-25 18:54:49 +00:00
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if (vcpu->guest_debug.enabled)
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kvmppc_load_guest_debug_registers(vcpu);
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2008-07-25 18:54:52 +00:00
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/* Mark every guest entry in the shadow TLB entry modified, so that they
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* will all be reloaded on the next vcpu run (instead of being
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* demand-faulted). */
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for (i = 0; i <= tlb_44x_hwater; i++)
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kvmppc_tlbe_set_modified(vcpu, i);
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2008-04-17 04:28:09 +00:00
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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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2008-07-25 18:54:49 +00:00
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if (vcpu->guest_debug.enabled)
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kvmppc_restore_host_debug_state(vcpu);
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2008-07-25 18:54:52 +00:00
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/* Don't leave guest TLB entries resident when being de-scheduled. */
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/* XXX It would be nice to differentiate between heavyweight exit and
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* sched_out here, since we could avoid the TLB flush for heavyweight
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* exits. */
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_tlbia();
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2008-04-17 04:28:09 +00:00
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}
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int kvm_arch_vcpu_ioctl_debug_guest(struct kvm_vcpu *vcpu,
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struct kvm_debug_guest *dbg)
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{
|
2008-07-25 18:54:49 +00:00
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int i;
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vcpu->guest_debug.enabled = dbg->enabled;
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if (vcpu->guest_debug.enabled) {
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for (i=0; i < ARRAY_SIZE(vcpu->guest_debug.bp); i++) {
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if (dbg->breakpoints[i].enabled)
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vcpu->guest_debug.bp[i] = dbg->breakpoints[i].address;
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else
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vcpu->guest_debug.bp[i] = 0;
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}
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}
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return 0;
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2008-04-17 04:28:09 +00:00
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}
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static void kvmppc_complete_dcr_load(struct kvm_vcpu *vcpu,
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struct kvm_run *run)
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{
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u32 *gpr = &vcpu->arch.gpr[vcpu->arch.io_gpr];
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*gpr = run->dcr.data;
|
|
|
|
}
|
|
|
|
|
|
|
|
static void kvmppc_complete_mmio_load(struct kvm_vcpu *vcpu,
|
|
|
|
struct kvm_run *run)
|
|
|
|
{
|
|
|
|
u32 *gpr = &vcpu->arch.gpr[vcpu->arch.io_gpr];
|
|
|
|
|
|
|
|
if (run->mmio.len > sizeof(*gpr)) {
|
|
|
|
printk(KERN_ERR "bad MMIO length: %d\n", run->mmio.len);
|
|
|
|
return;
|
|
|
|
}
|
|
|
|
|
|
|
|
if (vcpu->arch.mmio_is_bigendian) {
|
|
|
|
switch (run->mmio.len) {
|
|
|
|
case 4: *gpr = *(u32 *)run->mmio.data; break;
|
|
|
|
case 2: *gpr = *(u16 *)run->mmio.data; break;
|
|
|
|
case 1: *gpr = *(u8 *)run->mmio.data; break;
|
|
|
|
}
|
|
|
|
} else {
|
|
|
|
/* Convert BE data from userland back to LE. */
|
|
|
|
switch (run->mmio.len) {
|
|
|
|
case 4: *gpr = ld_le32((u32 *)run->mmio.data); break;
|
|
|
|
case 2: *gpr = ld_le16((u16 *)run->mmio.data); break;
|
|
|
|
case 1: *gpr = *(u8 *)run->mmio.data; break;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
int kvmppc_handle_load(struct kvm_run *run, struct kvm_vcpu *vcpu,
|
|
|
|
unsigned int rt, unsigned int bytes, int is_bigendian)
|
|
|
|
{
|
|
|
|
if (bytes > sizeof(run->mmio.data)) {
|
|
|
|
printk(KERN_ERR "%s: bad MMIO length: %d\n", __func__,
|
|
|
|
run->mmio.len);
|
|
|
|
}
|
|
|
|
|
|
|
|
run->mmio.phys_addr = vcpu->arch.paddr_accessed;
|
|
|
|
run->mmio.len = bytes;
|
|
|
|
run->mmio.is_write = 0;
|
|
|
|
|
|
|
|
vcpu->arch.io_gpr = rt;
|
|
|
|
vcpu->arch.mmio_is_bigendian = is_bigendian;
|
|
|
|
vcpu->mmio_needed = 1;
|
|
|
|
vcpu->mmio_is_write = 0;
|
|
|
|
|
|
|
|
return EMULATE_DO_MMIO;
|
|
|
|
}
|
|
|
|
|
|
|
|
int kvmppc_handle_store(struct kvm_run *run, struct kvm_vcpu *vcpu,
|
|
|
|
u32 val, unsigned int bytes, int is_bigendian)
|
|
|
|
{
|
|
|
|
void *data = run->mmio.data;
|
|
|
|
|
|
|
|
if (bytes > sizeof(run->mmio.data)) {
|
|
|
|
printk(KERN_ERR "%s: bad MMIO length: %d\n", __func__,
|
|
|
|
run->mmio.len);
|
|
|
|
}
|
|
|
|
|
|
|
|
run->mmio.phys_addr = vcpu->arch.paddr_accessed;
|
|
|
|
run->mmio.len = bytes;
|
|
|
|
run->mmio.is_write = 1;
|
|
|
|
vcpu->mmio_needed = 1;
|
|
|
|
vcpu->mmio_is_write = 1;
|
|
|
|
|
|
|
|
/* Store the value at the lowest bytes in 'data'. */
|
|
|
|
if (is_bigendian) {
|
|
|
|
switch (bytes) {
|
|
|
|
case 4: *(u32 *)data = val; break;
|
|
|
|
case 2: *(u16 *)data = val; break;
|
|
|
|
case 1: *(u8 *)data = val; break;
|
|
|
|
}
|
|
|
|
} else {
|
|
|
|
/* Store LE value into 'data'. */
|
|
|
|
switch (bytes) {
|
|
|
|
case 4: st_le32(data, val); break;
|
|
|
|
case 2: st_le16(data, val); break;
|
|
|
|
case 1: *(u8 *)data = val; break;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
return EMULATE_DO_MMIO;
|
|
|
|
}
|
|
|
|
|
|
|
|
int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu, struct kvm_run *run)
|
|
|
|
{
|
|
|
|
int r;
|
|
|
|
sigset_t sigsaved;
|
|
|
|
|
2008-04-25 22:55:49 +00:00
|
|
|
vcpu_load(vcpu);
|
|
|
|
|
2008-04-17 04:28:09 +00:00
|
|
|
if (vcpu->sigset_active)
|
|
|
|
sigprocmask(SIG_SETMASK, &vcpu->sigset, &sigsaved);
|
|
|
|
|
|
|
|
if (vcpu->mmio_needed) {
|
|
|
|
if (!vcpu->mmio_is_write)
|
|
|
|
kvmppc_complete_mmio_load(vcpu, run);
|
|
|
|
vcpu->mmio_needed = 0;
|
|
|
|
} else if (vcpu->arch.dcr_needed) {
|
|
|
|
if (!vcpu->arch.dcr_is_write)
|
|
|
|
kvmppc_complete_dcr_load(vcpu, run);
|
|
|
|
vcpu->arch.dcr_needed = 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
kvmppc_check_and_deliver_interrupts(vcpu);
|
|
|
|
|
|
|
|
local_irq_disable();
|
|
|
|
kvm_guest_enter();
|
|
|
|
r = __kvmppc_vcpu_run(run, vcpu);
|
|
|
|
kvm_guest_exit();
|
|
|
|
local_irq_enable();
|
|
|
|
|
|
|
|
if (vcpu->sigset_active)
|
|
|
|
sigprocmask(SIG_SETMASK, &sigsaved, NULL);
|
|
|
|
|
2008-04-25 22:55:49 +00:00
|
|
|
vcpu_put(vcpu);
|
|
|
|
|
2008-04-17 04:28:09 +00:00
|
|
|
return r;
|
|
|
|
}
|
|
|
|
|
|
|
|
int kvm_vcpu_ioctl_interrupt(struct kvm_vcpu *vcpu, struct kvm_interrupt *irq)
|
|
|
|
{
|
|
|
|
kvmppc_queue_exception(vcpu, BOOKE_INTERRUPT_EXTERNAL);
|
2008-04-25 22:55:49 +00:00
|
|
|
|
|
|
|
if (waitqueue_active(&vcpu->wq)) {
|
|
|
|
wake_up_interruptible(&vcpu->wq);
|
|
|
|
vcpu->stat.halt_wakeup++;
|
|
|
|
}
|
|
|
|
|
2008-04-17 04:28:09 +00:00
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
int kvm_arch_vcpu_ioctl_get_mpstate(struct kvm_vcpu *vcpu,
|
|
|
|
struct kvm_mp_state *mp_state)
|
|
|
|
{
|
|
|
|
return -EINVAL;
|
|
|
|
}
|
|
|
|
|
|
|
|
int kvm_arch_vcpu_ioctl_set_mpstate(struct kvm_vcpu *vcpu,
|
|
|
|
struct kvm_mp_state *mp_state)
|
|
|
|
{
|
|
|
|
return -EINVAL;
|
|
|
|
}
|
|
|
|
|
|
|
|
long kvm_arch_vcpu_ioctl(struct file *filp,
|
|
|
|
unsigned int ioctl, unsigned long arg)
|
|
|
|
{
|
|
|
|
struct kvm_vcpu *vcpu = filp->private_data;
|
|
|
|
void __user *argp = (void __user *)arg;
|
|
|
|
long r;
|
|
|
|
|
|
|
|
switch (ioctl) {
|
|
|
|
case KVM_INTERRUPT: {
|
|
|
|
struct kvm_interrupt irq;
|
|
|
|
r = -EFAULT;
|
|
|
|
if (copy_from_user(&irq, argp, sizeof(irq)))
|
|
|
|
goto out;
|
|
|
|
r = kvm_vcpu_ioctl_interrupt(vcpu, &irq);
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
default:
|
|
|
|
r = -EINVAL;
|
|
|
|
}
|
|
|
|
|
|
|
|
out:
|
|
|
|
return r;
|
|
|
|
}
|
|
|
|
|
|
|
|
int kvm_vm_ioctl_get_dirty_log(struct kvm *kvm, struct kvm_dirty_log *log)
|
|
|
|
{
|
|
|
|
return -ENOTSUPP;
|
|
|
|
}
|
|
|
|
|
|
|
|
long kvm_arch_vm_ioctl(struct file *filp,
|
|
|
|
unsigned int ioctl, unsigned long arg)
|
|
|
|
{
|
|
|
|
long r;
|
|
|
|
|
|
|
|
switch (ioctl) {
|
|
|
|
default:
|
|
|
|
r = -EINVAL;
|
|
|
|
}
|
|
|
|
|
|
|
|
return r;
|
|
|
|
}
|
|
|
|
|
|
|
|
int kvm_arch_init(void *opaque)
|
|
|
|
{
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
void kvm_arch_exit(void)
|
|
|
|
{
|
|
|
|
}
|