| /* |
| * 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/vmalloc.h> |
| #include <linux/hrtimer.h> |
| #include <linux/fs.h> |
| #include <linux/slab.h> |
| #include <linux/file.h> |
| #include <linux/module.h> |
| #include <asm/cputable.h> |
| #include <asm/uaccess.h> |
| #include <asm/kvm_ppc.h> |
| #include <asm/tlbflush.h> |
| #include <asm/cputhreads.h> |
| #include <asm/irqflags.h> |
| #include "timing.h" |
| #include "irq.h" |
| #include "../mm/mmu_decl.h" |
| |
| #define CREATE_TRACE_POINTS |
| #include "trace.h" |
| |
| struct kvmppc_ops *kvmppc_hv_ops; |
| EXPORT_SYMBOL_GPL(kvmppc_hv_ops); |
| struct kvmppc_ops *kvmppc_pr_ops; |
| EXPORT_SYMBOL_GPL(kvmppc_pr_ops); |
| |
| |
| int kvm_arch_vcpu_runnable(struct kvm_vcpu *v) |
| { |
| return !!(v->arch.pending_exceptions) || |
| v->requests; |
| } |
| |
| int kvm_arch_vcpu_should_kick(struct kvm_vcpu *vcpu) |
| { |
| return 1; |
| } |
| |
| /* |
| * Common checks before entering the guest world. Call with interrupts |
| * disabled. |
| * |
| * returns: |
| * |
| * == 1 if we're ready to go into guest state |
| * <= 0 if we need to go back to the host with return value |
| */ |
| int kvmppc_prepare_to_enter(struct kvm_vcpu *vcpu) |
| { |
| int r; |
| |
| WARN_ON(irqs_disabled()); |
| hard_irq_disable(); |
| |
| while (true) { |
| if (need_resched()) { |
| local_irq_enable(); |
| cond_resched(); |
| hard_irq_disable(); |
| continue; |
| } |
| |
| if (signal_pending(current)) { |
| kvmppc_account_exit(vcpu, SIGNAL_EXITS); |
| vcpu->run->exit_reason = KVM_EXIT_INTR; |
| r = -EINTR; |
| break; |
| } |
| |
| vcpu->mode = IN_GUEST_MODE; |
| |
| /* |
| * Reading vcpu->requests must happen after setting vcpu->mode, |
| * so we don't miss a request because the requester sees |
| * OUTSIDE_GUEST_MODE and assumes we'll be checking requests |
| * before next entering the guest (and thus doesn't IPI). |
| */ |
| smp_mb(); |
| |
| if (vcpu->requests) { |
| /* Make sure we process requests preemptable */ |
| local_irq_enable(); |
| trace_kvm_check_requests(vcpu); |
| r = kvmppc_core_check_requests(vcpu); |
| hard_irq_disable(); |
| if (r > 0) |
| continue; |
| break; |
| } |
| |
| if (kvmppc_core_prepare_to_enter(vcpu)) { |
| /* interrupts got enabled in between, so we |
| are back at square 1 */ |
| continue; |
| } |
| |
| kvm_guest_enter(); |
| return 1; |
| } |
| |
| /* return to host */ |
| local_irq_enable(); |
| return r; |
| } |
| EXPORT_SYMBOL_GPL(kvmppc_prepare_to_enter); |
| |
| int kvmppc_kvm_pv(struct kvm_vcpu *vcpu) |
| { |
| int nr = kvmppc_get_gpr(vcpu, 11); |
| int r; |
| unsigned long __maybe_unused param1 = kvmppc_get_gpr(vcpu, 3); |
| unsigned long __maybe_unused param2 = kvmppc_get_gpr(vcpu, 4); |
| unsigned long __maybe_unused param3 = kvmppc_get_gpr(vcpu, 5); |
| unsigned long __maybe_unused param4 = kvmppc_get_gpr(vcpu, 6); |
| unsigned long r2 = 0; |
| |
| if (!(vcpu->arch.shared->msr & MSR_SF)) { |
| /* 32 bit mode */ |
| param1 &= 0xffffffff; |
| param2 &= 0xffffffff; |
| param3 &= 0xffffffff; |
| param4 &= 0xffffffff; |
| } |
| |
| switch (nr) { |
| case KVM_HCALL_TOKEN(KVM_HC_PPC_MAP_MAGIC_PAGE): |
| { |
| vcpu->arch.magic_page_pa = param1; |
| vcpu->arch.magic_page_ea = param2; |
| |
| r2 = KVM_MAGIC_FEAT_SR | KVM_MAGIC_FEAT_MAS0_TO_SPRG7; |
| |
| r = EV_SUCCESS; |
| break; |
| } |
| case KVM_HCALL_TOKEN(KVM_HC_FEATURES): |
| r = EV_SUCCESS; |
| #if defined(CONFIG_PPC_BOOK3S) || defined(CONFIG_KVM_E500V2) |
| /* XXX Missing magic page on 44x */ |
| r2 |= (1 << KVM_FEATURE_MAGIC_PAGE); |
| #endif |
| |
| /* Second return value is in r4 */ |
| break; |
| case EV_HCALL_TOKEN(EV_IDLE): |
| r = EV_SUCCESS; |
| kvm_vcpu_block(vcpu); |
| clear_bit(KVM_REQ_UNHALT, &vcpu->requests); |
| break; |
| default: |
| r = EV_UNIMPLEMENTED; |
| break; |
| } |
| |
| kvmppc_set_gpr(vcpu, 4, r2); |
| |
| return r; |
| } |
| EXPORT_SYMBOL_GPL(kvmppc_kvm_pv); |
| |
| int kvmppc_sanity_check(struct kvm_vcpu *vcpu) |
| { |
| int r = false; |
| |
| /* We have to know what CPU to virtualize */ |
| if (!vcpu->arch.pvr) |
| goto out; |
| |
| /* PAPR only works with book3s_64 */ |
| if ((vcpu->arch.cpu_type != KVM_CPU_3S_64) && vcpu->arch.papr_enabled) |
| goto out; |
| |
| /* HV KVM can only do PAPR mode for now */ |
| if (!vcpu->arch.papr_enabled && is_kvmppc_hv_enabled(vcpu->kvm)) |
| goto out; |
| |
| #ifdef CONFIG_KVM_BOOKE_HV |
| if (!cpu_has_feature(CPU_FTR_EMB_HV)) |
| goto out; |
| #endif |
| |
| r = true; |
| |
| out: |
| vcpu->arch.sane = r; |
| return r ? 0 : -EINVAL; |
| } |
| EXPORT_SYMBOL_GPL(kvmppc_sanity_check); |
| |
| 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__, |
| kvmppc_get_last_inst(vcpu)); |
| r = RESUME_HOST; |
| break; |
| default: |
| WARN_ON(1); |
| r = RESUME_GUEST; |
| } |
| |
| return r; |
| } |
| EXPORT_SYMBOL_GPL(kvmppc_emulate_mmio); |
| |
| int kvm_arch_hardware_enable(void *garbage) |
| { |
| return 0; |
| } |
| |
| 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(); |
| } |
| |
| int kvm_arch_init_vm(struct kvm *kvm, unsigned long type) |
| { |
| struct kvmppc_ops *kvm_ops = NULL; |
| /* |
| * if we have both HV and PR enabled, default is HV |
| */ |
| if (type == 0) { |
| if (kvmppc_hv_ops) |
| kvm_ops = kvmppc_hv_ops; |
| else |
| kvm_ops = kvmppc_pr_ops; |
| if (!kvm_ops) |
| goto err_out; |
| } else if (type == KVM_VM_PPC_HV) { |
| if (!kvmppc_hv_ops) |
| goto err_out; |
| kvm_ops = kvmppc_hv_ops; |
| } else if (type == KVM_VM_PPC_PR) { |
| if (!kvmppc_pr_ops) |
| goto err_out; |
| kvm_ops = kvmppc_pr_ops; |
| } else |
| goto err_out; |
| |
| if (kvm_ops->owner && !try_module_get(kvm_ops->owner)) |
| return -ENOENT; |
| |
| kvm->arch.kvm_ops = kvm_ops; |
| return kvmppc_core_init_vm(kvm); |
| err_out: |
| return -EINVAL; |
| } |
| |
| void kvm_arch_destroy_vm(struct kvm *kvm) |
| { |
| unsigned int i; |
| struct kvm_vcpu *vcpu; |
| |
| kvm_for_each_vcpu(i, vcpu, kvm) |
| kvm_arch_vcpu_free(vcpu); |
| |
| mutex_lock(&kvm->lock); |
| for (i = 0; i < atomic_read(&kvm->online_vcpus); i++) |
| kvm->vcpus[i] = NULL; |
| |
| atomic_set(&kvm->online_vcpus, 0); |
| |
| kvmppc_core_destroy_vm(kvm); |
| |
| mutex_unlock(&kvm->lock); |
| |
| /* drop the module reference */ |
| module_put(kvm->arch.kvm_ops->owner); |
| } |
| |
| void kvm_arch_sync_events(struct kvm *kvm) |
| { |
| } |
| |
| int kvm_dev_ioctl_check_extension(long ext) |
| { |
| int r; |
| /* FIXME!! |
| * Should some of this be vm ioctl ? is it possible now ? |
| */ |
| int hv_enabled = kvmppc_hv_ops ? 1 : 0; |
| |
| switch (ext) { |
| #ifdef CONFIG_BOOKE |
| case KVM_CAP_PPC_BOOKE_SREGS: |
| case KVM_CAP_PPC_BOOKE_WATCHDOG: |
| case KVM_CAP_PPC_EPR: |
| #else |
| case KVM_CAP_PPC_SEGSTATE: |
| case KVM_CAP_PPC_HIOR: |
| case KVM_CAP_PPC_PAPR: |
| #endif |
| case KVM_CAP_PPC_UNSET_IRQ: |
| case KVM_CAP_PPC_IRQ_LEVEL: |
| case KVM_CAP_ENABLE_CAP: |
| case KVM_CAP_ONE_REG: |
| case KVM_CAP_IOEVENTFD: |
| case KVM_CAP_DEVICE_CTRL: |
| r = 1; |
| break; |
| case KVM_CAP_PPC_PAIRED_SINGLES: |
| case KVM_CAP_PPC_OSI: |
| case KVM_CAP_PPC_GET_PVINFO: |
| #if defined(CONFIG_KVM_E500V2) || defined(CONFIG_KVM_E500MC) |
| case KVM_CAP_SW_TLB: |
| #endif |
| /* We support this only for PR */ |
| r = !hv_enabled; |
| break; |
| #ifdef CONFIG_KVM_MMIO |
| case KVM_CAP_COALESCED_MMIO: |
| r = KVM_COALESCED_MMIO_PAGE_OFFSET; |
| break; |
| #endif |
| #ifdef CONFIG_KVM_MPIC |
| case KVM_CAP_IRQ_MPIC: |
| r = 1; |
| break; |
| #endif |
| |
| #ifdef CONFIG_PPC_BOOK3S_64 |
| case KVM_CAP_SPAPR_TCE: |
| case KVM_CAP_PPC_ALLOC_HTAB: |
| case KVM_CAP_PPC_RTAS: |
| #ifdef CONFIG_KVM_XICS |
| case KVM_CAP_IRQ_XICS: |
| #endif |
| r = 1; |
| break; |
| #endif /* CONFIG_PPC_BOOK3S_64 */ |
| #ifdef CONFIG_KVM_BOOK3S_HV_POSSIBLE |
| case KVM_CAP_PPC_SMT: |
| if (hv_enabled) |
| r = threads_per_subcore; |
| else |
| r = 0; |
| break; |
| case KVM_CAP_PPC_RMA: |
| r = hv_enabled; |
| /* PPC970 requires an RMA */ |
| if (r && cpu_has_feature(CPU_FTR_ARCH_201)) |
| r = 2; |
| break; |
| #endif |
| case KVM_CAP_SYNC_MMU: |
| #ifdef CONFIG_KVM_BOOK3S_HV_POSSIBLE |
| if (hv_enabled) |
| r = cpu_has_feature(CPU_FTR_ARCH_206) ? 1 : 0; |
| else |
| r = 0; |
| #elif defined(KVM_ARCH_WANT_MMU_NOTIFIER) |
| r = 1; |
| #else |
| r = 0; |
| #endif |
| break; |
| #ifdef CONFIG_KVM_BOOK3S_HV_POSSIBLE |
| case KVM_CAP_PPC_HTAB_FD: |
| r = hv_enabled; |
| break; |
| #endif |
| case KVM_CAP_NR_VCPUS: |
| /* |
| * Recommending a number of CPUs is somewhat arbitrary; we |
| * return the number of present CPUs for -HV (since a host |
| * will have secondary threads "offline"), and for other KVM |
| * implementations just count online CPUs. |
| */ |
| if (hv_enabled) |
| r = num_present_cpus(); |
| else |
| r = num_online_cpus(); |
| break; |
| case KVM_CAP_MAX_VCPUS: |
| r = KVM_MAX_VCPUS; |
| break; |
| #ifdef CONFIG_PPC_BOOK3S_64 |
| case KVM_CAP_PPC_GET_SMMU_INFO: |
| r = 1; |
| break; |
| #endif |
| default: |
| r = 0; |
| break; |
| } |
| return r; |
| |
| } |
| |
| long kvm_arch_dev_ioctl(struct file *filp, |
| unsigned int ioctl, unsigned long arg) |
| { |
| return -EINVAL; |
| } |
| |
| void kvm_arch_free_memslot(struct kvm *kvm, struct kvm_memory_slot *free, |
| struct kvm_memory_slot *dont) |
| { |
| kvmppc_core_free_memslot(kvm, free, dont); |
| } |
| |
| int kvm_arch_create_memslot(struct kvm *kvm, struct kvm_memory_slot *slot, |
| unsigned long npages) |
| { |
| return kvmppc_core_create_memslot(kvm, slot, npages); |
| } |
| |
| void kvm_arch_memslots_updated(struct kvm *kvm) |
| { |
| } |
| |
| int kvm_arch_prepare_memory_region(struct kvm *kvm, |
| struct kvm_memory_slot *memslot, |
| struct kvm_userspace_memory_region *mem, |
| enum kvm_mr_change change) |
| { |
| return kvmppc_core_prepare_memory_region(kvm, memslot, mem); |
| } |
| |
| void kvm_arch_commit_memory_region(struct kvm *kvm, |
| struct kvm_userspace_memory_region *mem, |
| const struct kvm_memory_slot *old, |
| enum kvm_mr_change change) |
| { |
| kvmppc_core_commit_memory_region(kvm, mem, old); |
| } |
| |
| void kvm_arch_flush_shadow_all(struct kvm *kvm) |
| { |
| } |
| |
| void kvm_arch_flush_shadow_memslot(struct kvm *kvm, |
| struct kvm_memory_slot *slot) |
| { |
| kvmppc_core_flush_memslot(kvm, slot); |
| } |
| |
| struct kvm_vcpu *kvm_arch_vcpu_create(struct kvm *kvm, unsigned int id) |
| { |
| struct kvm_vcpu *vcpu; |
| vcpu = kvmppc_core_vcpu_create(kvm, id); |
| if (!IS_ERR(vcpu)) { |
| vcpu->arch.wqp = &vcpu->wq; |
| kvmppc_create_vcpu_debugfs(vcpu, id); |
| } |
| return vcpu; |
| } |
| |
| int kvm_arch_vcpu_postcreate(struct kvm_vcpu *vcpu) |
| { |
| return 0; |
| } |
| |
| void kvm_arch_vcpu_free(struct kvm_vcpu *vcpu) |
| { |
| /* Make sure we're not using the vcpu anymore */ |
| hrtimer_cancel(&vcpu->arch.dec_timer); |
| tasklet_kill(&vcpu->arch.tasklet); |
| |
| kvmppc_remove_vcpu_debugfs(vcpu); |
| |
| switch (vcpu->arch.irq_type) { |
| case KVMPPC_IRQ_MPIC: |
| kvmppc_mpic_disconnect_vcpu(vcpu->arch.mpic, vcpu); |
| break; |
| case KVMPPC_IRQ_XICS: |
| kvmppc_xics_free_icp(vcpu); |
| break; |
| } |
| |
| 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); |
| } |
| |
| /* |
| * low level hrtimer wake routine. Because this runs in hardirq context |
| * we schedule a tasklet to do the real work. |
| */ |
| enum hrtimer_restart kvmppc_decrementer_wakeup(struct hrtimer *timer) |
| { |
| struct kvm_vcpu *vcpu; |
| |
| vcpu = container_of(timer, struct kvm_vcpu, arch.dec_timer); |
| tasklet_schedule(&vcpu->arch.tasklet); |
| |
| return HRTIMER_NORESTART; |
| } |
| |
| int kvm_arch_vcpu_init(struct kvm_vcpu *vcpu) |
| { |
| int ret; |
| |
| hrtimer_init(&vcpu->arch.dec_timer, CLOCK_REALTIME, HRTIMER_MODE_ABS); |
| tasklet_init(&vcpu->arch.tasklet, kvmppc_decrementer_func, (ulong)vcpu); |
| vcpu->arch.dec_timer.function = kvmppc_decrementer_wakeup; |
| vcpu->arch.dec_expires = ~(u64)0; |
| |
| #ifdef CONFIG_KVM_EXIT_TIMING |
| mutex_init(&vcpu->arch.exit_timing_lock); |
| #endif |
| ret = kvmppc_subarch_vcpu_init(vcpu); |
| return ret; |
| } |
| |
| void kvm_arch_vcpu_uninit(struct kvm_vcpu *vcpu) |
| { |
| kvmppc_mmu_destroy(vcpu); |
| kvmppc_subarch_vcpu_uninit(vcpu); |
| } |
| |
| void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu) |
| { |
| #ifdef CONFIG_BOOKE |
| /* |
| * vrsave (formerly usprg0) isn't used by Linux, but may |
| * be used by the guest. |
| * |
| * On non-booke this is associated with Altivec and |
| * is handled by code in book3s.c. |
| */ |
| mtspr(SPRN_VRSAVE, vcpu->arch.vrsave); |
| #endif |
| kvmppc_core_vcpu_load(vcpu, cpu); |
| } |
| |
| void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu) |
| { |
| kvmppc_core_vcpu_put(vcpu); |
| #ifdef CONFIG_BOOKE |
| vcpu->arch.vrsave = mfspr(SPRN_VRSAVE); |
| #endif |
| } |
| |
| static void kvmppc_complete_dcr_load(struct kvm_vcpu *vcpu, |
| struct kvm_run *run) |
| { |
| kvmppc_set_gpr(vcpu, vcpu->arch.io_gpr, run->dcr.data); |
| } |
| |
| static void kvmppc_complete_mmio_load(struct kvm_vcpu *vcpu, |
| struct kvm_run *run) |
| { |
| u64 uninitialized_var(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 8: gpr = *(u64 *)run->mmio.data; break; |
| 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; |
| } |
| } |
| |
| if (vcpu->arch.mmio_sign_extend) { |
| switch (run->mmio.len) { |
| #ifdef CONFIG_PPC64 |
| case 4: |
| gpr = (s64)(s32)gpr; |
| break; |
| #endif |
| case 2: |
| gpr = (s64)(s16)gpr; |
| break; |
| case 1: |
| gpr = (s64)(s8)gpr; |
| break; |
| } |
| } |
| |
| kvmppc_set_gpr(vcpu, vcpu->arch.io_gpr, gpr); |
| |
| switch (vcpu->arch.io_gpr & KVM_MMIO_REG_EXT_MASK) { |
| case KVM_MMIO_REG_GPR: |
| kvmppc_set_gpr(vcpu, vcpu->arch.io_gpr, gpr); |
| break; |
| case KVM_MMIO_REG_FPR: |
| VCPU_FPR(vcpu, vcpu->arch.io_gpr & KVM_MMIO_REG_MASK) = gpr; |
| break; |
| #ifdef CONFIG_PPC_BOOK3S |
| case KVM_MMIO_REG_QPR: |
| vcpu->arch.qpr[vcpu->arch.io_gpr & KVM_MMIO_REG_MASK] = gpr; |
| break; |
| case KVM_MMIO_REG_FQPR: |
| VCPU_FPR(vcpu, vcpu->arch.io_gpr & KVM_MMIO_REG_MASK) = gpr; |
| vcpu->arch.qpr[vcpu->arch.io_gpr & KVM_MMIO_REG_MASK] = gpr; |
| break; |
| #endif |
| default: |
| BUG(); |
| } |
| } |
| |
| int kvmppc_handle_load(struct kvm_run *run, struct kvm_vcpu *vcpu, |
| unsigned int rt, unsigned int bytes, |
| int is_default_endian) |
| { |
| int idx, ret; |
| int is_bigendian; |
| |
| if (kvmppc_need_byteswap(vcpu)) { |
| /* Default endianness is "little endian". */ |
| is_bigendian = !is_default_endian; |
| } else { |
| /* Default endianness is "big endian". */ |
| is_bigendian = is_default_endian; |
| } |
| |
| 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; |
| vcpu->arch.mmio_sign_extend = 0; |
| |
| idx = srcu_read_lock(&vcpu->kvm->srcu); |
| |
| ret = kvm_io_bus_read(vcpu->kvm, KVM_MMIO_BUS, run->mmio.phys_addr, |
| bytes, &run->mmio.data); |
| |
| srcu_read_unlock(&vcpu->kvm->srcu, idx); |
| |
| if (!ret) { |
| kvmppc_complete_mmio_load(vcpu, run); |
| vcpu->mmio_needed = 0; |
| return EMULATE_DONE; |
| } |
| |
| return EMULATE_DO_MMIO; |
| } |
| EXPORT_SYMBOL_GPL(kvmppc_handle_load); |
| |
| /* Same as above, but sign extends */ |
| int kvmppc_handle_loads(struct kvm_run *run, struct kvm_vcpu *vcpu, |
| unsigned int rt, unsigned int bytes, |
| int is_default_endian) |
| { |
| int r; |
| |
| vcpu->arch.mmio_sign_extend = 1; |
| r = kvmppc_handle_load(run, vcpu, rt, bytes, is_default_endian); |
| |
| return r; |
| } |
| |
| int kvmppc_handle_store(struct kvm_run *run, struct kvm_vcpu *vcpu, |
| u64 val, unsigned int bytes, int is_default_endian) |
| { |
| void *data = run->mmio.data; |
| int idx, ret; |
| int is_bigendian; |
| |
| if (kvmppc_need_byteswap(vcpu)) { |
| /* Default endianness is "little endian". */ |
| is_bigendian = !is_default_endian; |
| } else { |
| /* Default endianness is "big endian". */ |
| is_bigendian = is_default_endian; |
| } |
| |
| 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 8: *(u64 *)data = val; break; |
| 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; |
| } |
| } |
| |
| idx = srcu_read_lock(&vcpu->kvm->srcu); |
| |
| ret = kvm_io_bus_write(vcpu->kvm, KVM_MMIO_BUS, run->mmio.phys_addr, |
| bytes, &run->mmio.data); |
| |
| srcu_read_unlock(&vcpu->kvm->srcu, idx); |
| |
| if (!ret) { |
| vcpu->mmio_needed = 0; |
| return EMULATE_DONE; |
| } |
| |
| return EMULATE_DO_MMIO; |
| } |
| EXPORT_SYMBOL_GPL(kvmppc_handle_store); |
| |
| int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu, struct kvm_run *run) |
| { |
| int r; |
| sigset_t sigsaved; |
| |
| 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; |
| } else if (vcpu->arch.osi_needed) { |
| u64 *gprs = run->osi.gprs; |
| int i; |
| |
| for (i = 0; i < 32; i++) |
| kvmppc_set_gpr(vcpu, i, gprs[i]); |
| vcpu->arch.osi_needed = 0; |
| } else if (vcpu->arch.hcall_needed) { |
| int i; |
| |
| kvmppc_set_gpr(vcpu, 3, run->papr_hcall.ret); |
| for (i = 0; i < 9; ++i) |
| kvmppc_set_gpr(vcpu, 4 + i, run->papr_hcall.args[i]); |
| vcpu->arch.hcall_needed = 0; |
| #ifdef CONFIG_BOOKE |
| } else if (vcpu->arch.epr_needed) { |
| kvmppc_set_epr(vcpu, run->epr.epr); |
| vcpu->arch.epr_needed = 0; |
| #endif |
| } |
| |
| r = kvmppc_vcpu_run(run, vcpu); |
| |
| if (vcpu->sigset_active) |
| sigprocmask(SIG_SETMASK, &sigsaved, NULL); |
| |
| return r; |
| } |
| |
| int kvm_vcpu_ioctl_interrupt(struct kvm_vcpu *vcpu, struct kvm_interrupt *irq) |
| { |
| if (irq->irq == KVM_INTERRUPT_UNSET) { |
| kvmppc_core_dequeue_external(vcpu); |
| return 0; |
| } |
| |
| kvmppc_core_queue_external(vcpu, irq); |
| |
| kvm_vcpu_kick(vcpu); |
| |
| return 0; |
| } |
| |
| static int kvm_vcpu_ioctl_enable_cap(struct kvm_vcpu *vcpu, |
| struct kvm_enable_cap *cap) |
| { |
| int r; |
| |
| if (cap->flags) |
| return -EINVAL; |
| |
| switch (cap->cap) { |
| case KVM_CAP_PPC_OSI: |
| r = 0; |
| vcpu->arch.osi_enabled = true; |
| break; |
| case KVM_CAP_PPC_PAPR: |
| r = 0; |
| vcpu->arch.papr_enabled = true; |
| break; |
| case KVM_CAP_PPC_EPR: |
| r = 0; |
| if (cap->args[0]) |
| vcpu->arch.epr_flags |= KVMPPC_EPR_USER; |
| else |
| vcpu->arch.epr_flags &= ~KVMPPC_EPR_USER; |
| break; |
| #ifdef CONFIG_BOOKE |
| case KVM_CAP_PPC_BOOKE_WATCHDOG: |
| r = 0; |
| vcpu->arch.watchdog_enabled = true; |
| break; |
| #endif |
| #if defined(CONFIG_KVM_E500V2) || defined(CONFIG_KVM_E500MC) |
| case KVM_CAP_SW_TLB: { |
| struct kvm_config_tlb cfg; |
| void __user *user_ptr = (void __user *)(uintptr_t)cap->args[0]; |
| |
| r = -EFAULT; |
| if (copy_from_user(&cfg, user_ptr, sizeof(cfg))) |
| break; |
| |
| r = kvm_vcpu_ioctl_config_tlb(vcpu, &cfg); |
| break; |
| } |
| #endif |
| #ifdef CONFIG_KVM_MPIC |
| case KVM_CAP_IRQ_MPIC: { |
| struct fd f; |
| struct kvm_device *dev; |
| |
| r = -EBADF; |
| f = fdget(cap->args[0]); |
| if (!f.file) |
| break; |
| |
| r = -EPERM; |
| dev = kvm_device_from_filp(f.file); |
| if (dev) |
| r = kvmppc_mpic_connect_vcpu(dev, vcpu, cap->args[1]); |
| |
| fdput(f); |
| break; |
| } |
| #endif |
| #ifdef CONFIG_KVM_XICS |
| case KVM_CAP_IRQ_XICS: { |
| struct fd f; |
| struct kvm_device *dev; |
| |
| r = -EBADF; |
| f = fdget(cap->args[0]); |
| if (!f.file) |
| break; |
| |
| r = -EPERM; |
| dev = kvm_device_from_filp(f.file); |
| if (dev) |
| r = kvmppc_xics_connect_vcpu(dev, vcpu, cap->args[1]); |
| |
| fdput(f); |
| break; |
| } |
| #endif /* CONFIG_KVM_XICS */ |
| default: |
| r = -EINVAL; |
| break; |
| } |
| |
| if (!r) |
| r = kvmppc_sanity_check(vcpu); |
| |
| return r; |
| } |
| |
| 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); |
| goto out; |
| } |
| |
| case KVM_ENABLE_CAP: |
| { |
| struct kvm_enable_cap cap; |
| r = -EFAULT; |
| if (copy_from_user(&cap, argp, sizeof(cap))) |
| goto out; |
| r = kvm_vcpu_ioctl_enable_cap(vcpu, &cap); |
| break; |
| } |
| |
| case KVM_SET_ONE_REG: |
| case KVM_GET_ONE_REG: |
| { |
| struct kvm_one_reg reg; |
| r = -EFAULT; |
| if (copy_from_user(®, argp, sizeof(reg))) |
| goto out; |
| if (ioctl == KVM_SET_ONE_REG) |
| r = kvm_vcpu_ioctl_set_one_reg(vcpu, ®); |
| else |
| r = kvm_vcpu_ioctl_get_one_reg(vcpu, ®); |
| break; |
| } |
| |
| #if defined(CONFIG_KVM_E500V2) || defined(CONFIG_KVM_E500MC) |
| case KVM_DIRTY_TLB: { |
| struct kvm_dirty_tlb dirty; |
| r = -EFAULT; |
| if (copy_from_user(&dirty, argp, sizeof(dirty))) |
| goto out; |
| r = kvm_vcpu_ioctl_dirty_tlb(vcpu, &dirty); |
| break; |
| } |
| #endif |
| default: |
| r = -EINVAL; |
| } |
| |
| out: |
| return r; |
| } |
| |
| int kvm_arch_vcpu_fault(struct kvm_vcpu *vcpu, struct vm_fault *vmf) |
| { |
| return VM_FAULT_SIGBUS; |
| } |
| |
| static int kvm_vm_ioctl_get_pvinfo(struct kvm_ppc_pvinfo *pvinfo) |
| { |
| u32 inst_nop = 0x60000000; |
| #ifdef CONFIG_KVM_BOOKE_HV |
| u32 inst_sc1 = 0x44000022; |
| pvinfo->hcall[0] = inst_sc1; |
| pvinfo->hcall[1] = inst_nop; |
| pvinfo->hcall[2] = inst_nop; |
| pvinfo->hcall[3] = inst_nop; |
| #else |
| u32 inst_lis = 0x3c000000; |
| u32 inst_ori = 0x60000000; |
| u32 inst_sc = 0x44000002; |
| u32 inst_imm_mask = 0xffff; |
| |
| /* |
| * The hypercall to get into KVM from within guest context is as |
| * follows: |
| * |
| * lis r0, r0, KVM_SC_MAGIC_R0@h |
| * ori r0, KVM_SC_MAGIC_R0@l |
| * sc |
| * nop |
| */ |
| pvinfo->hcall[0] = inst_lis | ((KVM_SC_MAGIC_R0 >> 16) & inst_imm_mask); |
| pvinfo->hcall[1] = inst_ori | (KVM_SC_MAGIC_R0 & inst_imm_mask); |
| pvinfo->hcall[2] = inst_sc; |
| pvinfo->hcall[3] = inst_nop; |
| #endif |
| |
| pvinfo->flags = KVM_PPC_PVINFO_FLAGS_EV_IDLE; |
| |
| return 0; |
| } |
| |
| int kvm_vm_ioctl_irq_line(struct kvm *kvm, struct kvm_irq_level *irq_event, |
| bool line_status) |
| { |
| if (!irqchip_in_kernel(kvm)) |
| return -ENXIO; |
| |
| irq_event->status = kvm_set_irq(kvm, KVM_USERSPACE_IRQ_SOURCE_ID, |
| irq_event->irq, irq_event->level, |
| line_status); |
| return 0; |
| } |
| |
| long kvm_arch_vm_ioctl(struct file *filp, |
| unsigned int ioctl, unsigned long arg) |
| { |
| struct kvm *kvm __maybe_unused = filp->private_data; |
| void __user *argp = (void __user *)arg; |
| long r; |
| |
| switch (ioctl) { |
| case KVM_PPC_GET_PVINFO: { |
| struct kvm_ppc_pvinfo pvinfo; |
| memset(&pvinfo, 0, sizeof(pvinfo)); |
| r = kvm_vm_ioctl_get_pvinfo(&pvinfo); |
| if (copy_to_user(argp, &pvinfo, sizeof(pvinfo))) { |
| r = -EFAULT; |
| goto out; |
| } |
| |
| break; |
| } |
| #ifdef CONFIG_PPC_BOOK3S_64 |
| case KVM_CREATE_SPAPR_TCE: { |
| struct kvm_create_spapr_tce create_tce; |
| |
| r = -EFAULT; |
| if (copy_from_user(&create_tce, argp, sizeof(create_tce))) |
| goto out; |
| r = kvm_vm_ioctl_create_spapr_tce(kvm, &create_tce); |
| goto out; |
| } |
| case KVM_PPC_GET_SMMU_INFO: { |
| struct kvm_ppc_smmu_info info; |
| struct kvm *kvm = filp->private_data; |
| |
| memset(&info, 0, sizeof(info)); |
| r = kvm->arch.kvm_ops->get_smmu_info(kvm, &info); |
| if (r >= 0 && copy_to_user(argp, &info, sizeof(info))) |
| r = -EFAULT; |
| break; |
| } |
| case KVM_PPC_RTAS_DEFINE_TOKEN: { |
| struct kvm *kvm = filp->private_data; |
| |
| r = kvm_vm_ioctl_rtas_define_token(kvm, argp); |
| break; |
| } |
| default: { |
| struct kvm *kvm = filp->private_data; |
| r = kvm->arch.kvm_ops->arch_vm_ioctl(filp, ioctl, arg); |
| } |
| #else /* CONFIG_PPC_BOOK3S_64 */ |
| default: |
| r = -ENOTTY; |
| #endif |
| } |
| out: |
| return r; |
| } |
| |
| static unsigned long lpid_inuse[BITS_TO_LONGS(KVMPPC_NR_LPIDS)]; |
| static unsigned long nr_lpids; |
| |
| long kvmppc_alloc_lpid(void) |
| { |
| long lpid; |
| |
| do { |
| lpid = find_first_zero_bit(lpid_inuse, KVMPPC_NR_LPIDS); |
| if (lpid >= nr_lpids) { |
| pr_err("%s: No LPIDs free\n", __func__); |
| return -ENOMEM; |
| } |
| } while (test_and_set_bit(lpid, lpid_inuse)); |
| |
| return lpid; |
| } |
| EXPORT_SYMBOL_GPL(kvmppc_alloc_lpid); |
| |
| void kvmppc_claim_lpid(long lpid) |
| { |
| set_bit(lpid, lpid_inuse); |
| } |
| EXPORT_SYMBOL_GPL(kvmppc_claim_lpid); |
| |
| void kvmppc_free_lpid(long lpid) |
| { |
| clear_bit(lpid, lpid_inuse); |
| } |
| EXPORT_SYMBOL_GPL(kvmppc_free_lpid); |
| |
| void kvmppc_init_lpid(unsigned long nr_lpids_param) |
| { |
| nr_lpids = min_t(unsigned long, KVMPPC_NR_LPIDS, nr_lpids_param); |
| memset(lpid_inuse, 0, sizeof(lpid_inuse)); |
| } |
| EXPORT_SYMBOL_GPL(kvmppc_init_lpid); |
| |
| int kvm_arch_init(void *opaque) |
| { |
| return 0; |
| } |
| |
| void kvm_arch_exit(void) |
| { |
| |
| } |