| /* |
| * 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. |
| * |
| * Copyright IBM Corp. 2007 |
| * |
| * Authors: Hollis Blanchard <hollisb@us.ibm.com> |
| * Christian Ehrhardt <ehrhardt@linux.vnet.ibm.com> |
| */ |
| |
| #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/cputable.h> |
| #include <asm/uaccess.h> |
| #include <asm/kvm_ppc.h> |
| #include <asm/tlbflush.h> |
| #include "../mm/mmu_decl.h" |
| |
| |
| gfn_t unalias_gfn(struct kvm *kvm, gfn_t gfn) |
| { |
| return gfn; |
| } |
| |
| int kvm_cpu_has_interrupt(struct kvm_vcpu *v) |
| { |
| return !!(v->arch.pending_exceptions); |
| } |
| |
| int kvm_arch_vcpu_runnable(struct kvm_vcpu *v) |
| { |
| return !(v->arch.msr & MSR_WE); |
| } |
| |
| |
| int kvmppc_emulate_mmio(struct kvm_run *run, struct kvm_vcpu *vcpu) |
| { |
| enum emulation_result er; |
| int r; |
| |
| er = kvmppc_emulate_instruction(run, vcpu); |
| switch (er) { |
| case EMULATE_DONE: |
| /* Future optimization: only reload non-volatiles if they were |
| * actually modified. */ |
| r = RESUME_GUEST_NV; |
| break; |
| case EMULATE_DO_MMIO: |
| run->exit_reason = KVM_EXIT_MMIO; |
| /* We must reload nonvolatiles because "update" load/store |
| * instructions modify register state. */ |
| /* Future optimization: only reload non-volatiles if they were |
| * actually modified. */ |
| r = RESUME_HOST_NV; |
| break; |
| case EMULATE_FAIL: |
| /* XXX Deliver Program interrupt to guest. */ |
| printk(KERN_EMERG "%s: emulation failed (%08x)\n", __func__, |
| vcpu->arch.last_inst); |
| r = RESUME_HOST; |
| break; |
| default: |
| BUG(); |
| } |
| |
| return r; |
| } |
| |
| void kvm_arch_hardware_enable(void *garbage) |
| { |
| } |
| |
| void kvm_arch_hardware_disable(void *garbage) |
| { |
| } |
| |
| int kvm_arch_hardware_setup(void) |
| { |
| return 0; |
| } |
| |
| void kvm_arch_hardware_unsetup(void) |
| { |
| } |
| |
| void kvm_arch_check_processor_compat(void *rtn) |
| { |
| *(int *)rtn = kvmppc_core_check_processor_compat(); |
| } |
| |
| struct kvm *kvm_arch_create_vm(void) |
| { |
| struct kvm *kvm; |
| |
| kvm = kzalloc(sizeof(struct kvm), GFP_KERNEL); |
| if (!kvm) |
| return ERR_PTR(-ENOMEM); |
| |
| return kvm; |
| } |
| |
| static void kvmppc_free_vcpus(struct kvm *kvm) |
| { |
| unsigned int i; |
| |
| for (i = 0; i < KVM_MAX_VCPUS; ++i) { |
| if (kvm->vcpus[i]) { |
| kvm_arch_vcpu_free(kvm->vcpus[i]); |
| kvm->vcpus[i] = NULL; |
| } |
| } |
| } |
| |
| void kvm_arch_destroy_vm(struct kvm *kvm) |
| { |
| kvmppc_free_vcpus(kvm); |
| kvm_free_physmem(kvm); |
| kfree(kvm); |
| } |
| |
| int kvm_dev_ioctl_check_extension(long ext) |
| { |
| int r; |
| |
| switch (ext) { |
| case KVM_CAP_USER_MEMORY: |
| r = 1; |
| break; |
| case KVM_CAP_COALESCED_MMIO: |
| r = KVM_COALESCED_MMIO_PAGE_OFFSET; |
| break; |
| default: |
| r = 0; |
| break; |
| } |
| return r; |
| |
| } |
| |
| long kvm_arch_dev_ioctl(struct file *filp, |
| unsigned int ioctl, unsigned long arg) |
| { |
| return -EINVAL; |
| } |
| |
| int kvm_arch_set_memory_region(struct kvm *kvm, |
| struct kvm_userspace_memory_region *mem, |
| struct kvm_memory_slot old, |
| int user_alloc) |
| { |
| return 0; |
| } |
| |
| void kvm_arch_flush_shadow(struct kvm *kvm) |
| { |
| } |
| |
| struct kvm_vcpu *kvm_arch_vcpu_create(struct kvm *kvm, unsigned int id) |
| { |
| return kvmppc_core_vcpu_create(kvm, id); |
| } |
| |
| void kvm_arch_vcpu_free(struct kvm_vcpu *vcpu) |
| { |
| kvmppc_core_vcpu_free(vcpu); |
| } |
| |
| void kvm_arch_vcpu_destroy(struct kvm_vcpu *vcpu) |
| { |
| kvm_arch_vcpu_free(vcpu); |
| } |
| |
| int kvm_cpu_has_pending_timer(struct kvm_vcpu *vcpu) |
| { |
| return kvmppc_core_pending_dec(vcpu); |
| } |
| |
| static void kvmppc_decrementer_func(unsigned long data) |
| { |
| struct kvm_vcpu *vcpu = (struct kvm_vcpu *)data; |
| |
| kvmppc_core_queue_dec(vcpu); |
| |
| if (waitqueue_active(&vcpu->wq)) { |
| wake_up_interruptible(&vcpu->wq); |
| vcpu->stat.halt_wakeup++; |
| } |
| } |
| |
| int kvm_arch_vcpu_init(struct kvm_vcpu *vcpu) |
| { |
| setup_timer(&vcpu->arch.dec_timer, kvmppc_decrementer_func, |
| (unsigned long)vcpu); |
| |
| return 0; |
| } |
| |
| void kvm_arch_vcpu_uninit(struct kvm_vcpu *vcpu) |
| { |
| kvmppc_core_destroy_mmu(vcpu); |
| } |
| |
| void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu) |
| { |
| if (vcpu->guest_debug.enabled) |
| kvmppc_core_load_guest_debugstate(vcpu); |
| |
| kvmppc_core_vcpu_load(vcpu, cpu); |
| } |
| |
| void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu) |
| { |
| if (vcpu->guest_debug.enabled) |
| kvmppc_core_load_host_debugstate(vcpu); |
| |
| /* Don't leave guest TLB entries resident when being de-scheduled. */ |
| /* XXX It would be nice to differentiate between heavyweight exit and |
| * sched_out here, since we could avoid the TLB flush for heavyweight |
| * exits. */ |
| _tlbil_all(); |
| kvmppc_core_vcpu_put(vcpu); |
| } |
| |
| int kvm_arch_vcpu_ioctl_debug_guest(struct kvm_vcpu *vcpu, |
| struct kvm_debug_guest *dbg) |
| { |
| int i; |
| |
| vcpu->guest_debug.enabled = dbg->enabled; |
| if (vcpu->guest_debug.enabled) { |
| for (i=0; i < ARRAY_SIZE(vcpu->guest_debug.bp); i++) { |
| if (dbg->breakpoints[i].enabled) |
| vcpu->guest_debug.bp[i] = dbg->breakpoints[i].address; |
| else |
| vcpu->guest_debug.bp[i] = 0; |
| } |
| } |
| |
| return 0; |
| } |
| |
| static void kvmppc_complete_dcr_load(struct kvm_vcpu *vcpu, |
| struct kvm_run *run) |
| { |
| ulong *gpr = &vcpu->arch.gpr[vcpu->arch.io_gpr]; |
| *gpr = run->dcr.data; |
| } |
| |
| static void kvmppc_complete_mmio_load(struct kvm_vcpu *vcpu, |
| struct kvm_run *run) |
| { |
| ulong *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; |
| |
| vcpu_load(vcpu); |
| |
| 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_core_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); |
| |
| vcpu_put(vcpu); |
| |
| return r; |
| } |
| |
| int kvm_vcpu_ioctl_interrupt(struct kvm_vcpu *vcpu, struct kvm_interrupt *irq) |
| { |
| kvmppc_core_queue_external(vcpu, irq); |
| |
| if (waitqueue_active(&vcpu->wq)) { |
| wake_up_interruptible(&vcpu->wq); |
| vcpu->stat.halt_wakeup++; |
| } |
| |
| 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) |
| { |
| } |