diff options
Diffstat (limited to 'arch/powerpc/kvm/powerpc.c')
| -rw-r--r-- | arch/powerpc/kvm/powerpc.c | 908 |
1 files changed, 831 insertions, 77 deletions
diff --git a/arch/powerpc/kvm/powerpc.c b/arch/powerpc/kvm/powerpc.c index f06cf93b178..61c738ab128 100644 --- a/arch/powerpc/kvm/powerpc.c +++ b/arch/powerpc/kvm/powerpc.c @@ -21,30 +21,233 @@ #include <linux/errno.h> #include <linux/err.h> #include <linux/kvm_host.h> -#include <linux/module.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" -gfn_t unalias_gfn(struct kvm *kvm, gfn_t gfn) +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 gfn; + return !!(v->arch.pending_exceptions) || + v->requests; } -int kvm_arch_vcpu_runnable(struct kvm_vcpu *v) +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); + +#if defined(CONFIG_PPC_BOOK3S_64) && defined(CONFIG_KVM_BOOK3S_PR_POSSIBLE) +static void kvmppc_swab_shared(struct kvm_vcpu *vcpu) +{ + struct kvm_vcpu_arch_shared *shared = vcpu->arch.shared; + int i; + + shared->sprg0 = swab64(shared->sprg0); + shared->sprg1 = swab64(shared->sprg1); + shared->sprg2 = swab64(shared->sprg2); + shared->sprg3 = swab64(shared->sprg3); + shared->srr0 = swab64(shared->srr0); + shared->srr1 = swab64(shared->srr1); + shared->dar = swab64(shared->dar); + shared->msr = swab64(shared->msr); + shared->dsisr = swab32(shared->dsisr); + shared->int_pending = swab32(shared->int_pending); + for (i = 0; i < ARRAY_SIZE(shared->sr); i++) + shared->sr[i] = swab32(shared->sr[i]); +} +#endif + +int kvmppc_kvm_pv(struct kvm_vcpu *vcpu) { - return !(v->arch.msr & MSR_WE) || !!(v->arch.pending_exceptions); + 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 (!(kvmppc_get_msr(vcpu) & 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): + { +#if defined(CONFIG_PPC_BOOK3S_64) && defined(CONFIG_KVM_BOOK3S_PR_POSSIBLE) + /* Book3S can be little endian, find it out here */ + int shared_big_endian = true; + if (vcpu->arch.intr_msr & MSR_LE) + shared_big_endian = false; + if (shared_big_endian != vcpu->arch.shared_big_endian) + kvmppc_swab_shared(vcpu); + vcpu->arch.shared_big_endian = shared_big_endian; +#endif + + if (!(param2 & MAGIC_PAGE_FLAG_NOT_MAPPED_NX)) { + /* + * Older versions of the Linux magic page code had + * a bug where they would map their trampoline code + * NX. If that's the case, remove !PR NX capability. + */ + vcpu->arch.disable_kernel_nx = true; + kvm_make_request(KVM_REQ_TLB_FLUSH, vcpu); + } + + vcpu->arch.magic_page_pa = param1 & ~0xfffULL; + vcpu->arch.magic_page_ea = param2 & ~0xfffULL; + + 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) { @@ -69,15 +272,17 @@ int kvmppc_emulate_mmio(struct kvm_run *run, struct kvm_vcpu *vcpu) case EMULATE_FAIL: /* XXX Deliver Program interrupt to guest. */ printk(KERN_EMERG "%s: emulation failed (%08x)\n", __func__, - vcpu->arch.last_inst); + kvmppc_get_last_inst(vcpu)); r = RESUME_HOST; break; default: - BUG(); + WARN_ON(1); + r = RESUME_GUEST; } return r; } +EXPORT_SYMBOL_GPL(kvmppc_emulate_mmio); int kvm_arch_hardware_enable(void *garbage) { @@ -102,18 +307,40 @@ void kvm_arch_check_processor_compat(void *rtn) *(int *)rtn = kvmppc_core_check_processor_compat(); } -struct kvm *kvm_arch_create_vm(void) +int kvm_arch_init_vm(struct kvm *kvm, unsigned long type) { - struct kvm *kvm; - - kvm = kzalloc(sizeof(struct kvm), GFP_KERNEL); - if (!kvm) - return ERR_PTR(-ENOMEM); - - return kvm; + 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; } -static void kvmppc_free_vcpus(struct kvm *kvm) +void kvm_arch_destroy_vm(struct kvm *kvm) { unsigned int i; struct kvm_vcpu *vcpu; @@ -126,31 +353,127 @@ static void kvmppc_free_vcpus(struct kvm *kvm) kvm->vcpus[i] = NULL; atomic_set(&kvm->online_vcpus, 0); + + kvmppc_core_destroy_vm(kvm); + mutex_unlock(&kvm->lock); -} -void kvm_arch_sync_events(struct kvm *kvm) -{ + /* drop the module reference */ + module_put(kvm->arch.kvm_ops->owner); } -void kvm_arch_destroy_vm(struct kvm *kvm) +void kvm_arch_sync_events(struct kvm *kvm) { - kvmppc_free_vcpus(kvm); - kvm_free_physmem(kvm); - kfree(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: + case KVM_CAP_PPC_FIXUP_HCALL: +#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; @@ -165,29 +488,81 @@ long kvm_arch_dev_ioctl(struct file *filp, 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) +void kvm_arch_free_memslot(struct kvm *kvm, struct kvm_memory_slot *free, + struct kvm_memory_slot *dont) { - return 0; + 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(struct kvm *kvm) +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); - kvmppc_create_vcpu_debugfs(vcpu, 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); } @@ -201,18 +576,6 @@ 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++; - } -} - /* * low level hrtimer wake routine. Because this runs in hardirq context * we schedule a tasklet to do the real work. @@ -229,70 +592,135 @@ enum hrtimer_restart kvmppc_decrementer_wakeup(struct hrtimer *timer) 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; - return 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); -} - -int kvm_arch_vcpu_ioctl_set_guest_debug(struct kvm_vcpu *vcpu, - struct kvm_guest_debug *dbg) -{ - return -EINVAL; +#ifdef CONFIG_BOOKE + vcpu->arch.vrsave = mfspr(SPRN_VRSAVE); +#endif } 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; + 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) { - ulong *gpr = &vcpu->arch.gpr[vcpu->arch.io_gpr]; + u64 uninitialized_var(gpr); - if (run->mmio.len > sizeof(*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; + 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; + 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_bigendian) + 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); @@ -306,14 +734,52 @@ int kvmppc_handle_load(struct kvm_run *run, struct kvm_vcpu *vcpu, 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, - u32 val, unsigned int bytes, int is_bigendian) + 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__, @@ -329,6 +795,7 @@ int kvmppc_handle_store(struct kvm_run *run, struct kvm_vcpu *vcpu, /* 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; @@ -342,16 +809,27 @@ int kvmppc_handle_store(struct kvm_run *run, struct kvm_vcpu *vcpu, } } + 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; - vcpu_load(vcpu); - if (vcpu->sigset_active) sigprocmask(SIG_SETMASK, &vcpu->sigset, &sigsaved); @@ -363,36 +841,141 @@ int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu, struct kvm_run *run) 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 } - kvmppc_core_deliver_interrupts(vcpu); - - local_irq_disable(); - kvm_guest_enter(); - r = __kvmppc_vcpu_run(run, vcpu); - kvm_guest_exit(); - local_irq_enable(); + r = kvmppc_vcpu_run(run, vcpu); 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) { + if (irq->irq == KVM_INTERRUPT_UNSET) { + kvmppc_core_dequeue_external(vcpu); + return 0; + } + kvmppc_core_queue_external(vcpu, irq); - if (waitqueue_active(&vcpu->wq)) { - wake_up_interruptible(&vcpu->wq); - vcpu->stat.halt_wakeup++; - } + 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) { @@ -419,8 +1002,43 @@ long kvm_arch_vcpu_ioctl(struct file *filp, 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; } @@ -429,19 +1047,154 @@ 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] = cpu_to_be32(inst_sc1); + pvinfo->hcall[1] = cpu_to_be32(inst_nop); + pvinfo->hcall[2] = cpu_to_be32(inst_nop); + pvinfo->hcall[3] = cpu_to_be32(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] = cpu_to_be32(inst_lis | ((KVM_SC_MAGIC_R0 >> 16) & inst_imm_mask)); + pvinfo->hcall[1] = cpu_to_be32(inst_ori | (KVM_SC_MAGIC_R0 & inst_imm_mask)); + pvinfo->hcall[2] = cpu_to_be32(inst_sc); + pvinfo->hcall[3] = cpu_to_be32(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; @@ -449,4 +1202,5 @@ int kvm_arch_init(void *opaque) void kvm_arch_exit(void) { + } |