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- // SPDX-License-Identifier: GPL-2.0-only
- /*
- *
- * Copyright IBM Corp. 2007
- *
- * Authors: Hollis Blanchard <[email protected]>
- * Christian Ehrhardt <[email protected]>
- */
- #include <linux/errno.h>
- #include <linux/err.h>
- #include <linux/kvm_host.h>
- #include <linux/vmalloc.h>
- #include <linux/hrtimer.h>
- #include <linux/sched/signal.h>
- #include <linux/fs.h>
- #include <linux/slab.h>
- #include <linux/file.h>
- #include <linux/module.h>
- #include <linux/irqbypass.h>
- #include <linux/kvm_irqfd.h>
- #include <linux/of.h>
- #include <asm/cputable.h>
- #include <linux/uaccess.h>
- #include <asm/kvm_ppc.h>
- #include <asm/cputhreads.h>
- #include <asm/irqflags.h>
- #include <asm/iommu.h>
- #include <asm/switch_to.h>
- #include <asm/xive.h>
- #ifdef CONFIG_PPC_PSERIES
- #include <asm/hvcall.h>
- #include <asm/plpar_wrappers.h>
- #endif
- #include <asm/ultravisor.h>
- #include <asm/setup.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) || kvm_request_pending(v);
- }
- bool kvm_arch_dy_runnable(struct kvm_vcpu *vcpu)
- {
- return kvm_arch_vcpu_runnable(vcpu);
- }
- bool kvm_arch_vcpu_in_kernel(struct kvm_vcpu *vcpu)
- {
- return false;
- }
- 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).
- * This also orders the write to mode from any reads
- * to the page tables done while the VCPU is running.
- * Please see the comment in kvm_flush_remote_tlbs.
- */
- smp_mb();
- if (kvm_request_pending(vcpu)) {
- /* 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;
- }
- guest_enter_irqoff();
- 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)
- {
- 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;
- #ifdef CONFIG_PPC_64K_PAGES
- /*
- * Make sure our 4k magic page is in the same window of a 64k
- * page within the guest and within the host's page.
- */
- if ((vcpu->arch.magic_page_pa & 0xf000) !=
- ((ulong)vcpu->arch.shared & 0xf000)) {
- void *old_shared = vcpu->arch.shared;
- ulong shared = (ulong)vcpu->arch.shared;
- void *new_shared;
- shared &= PAGE_MASK;
- shared |= vcpu->arch.magic_page_pa & 0xf000;
- new_shared = (void*)shared;
- memcpy(new_shared, old_shared, 0x1000);
- vcpu->arch.shared = new_shared;
- }
- #endif
- 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)
- 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_halt(vcpu);
- 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_vcpu *vcpu)
- {
- enum emulation_result er;
- int r;
- er = kvmppc_emulate_loadstore(vcpu);
- switch (er) {
- case EMULATE_DONE:
- /* Future optimization: only reload non-volatiles if they were
- * actually modified. */
- r = RESUME_GUEST_NV;
- break;
- case EMULATE_AGAIN:
- r = RESUME_GUEST;
- break;
- case EMULATE_DO_MMIO:
- vcpu->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:
- {
- u32 last_inst;
- kvmppc_get_last_inst(vcpu, INST_GENERIC, &last_inst);
- kvm_debug_ratelimited("Guest access to device memory using unsupported instruction (opcode: %#08x)\n",
- last_inst);
- /*
- * Injecting a Data Storage here is a bit more
- * accurate since the instruction that caused the
- * access could still be a valid one.
- */
- if (!IS_ENABLED(CONFIG_BOOKE)) {
- ulong dsisr = DSISR_BADACCESS;
- if (vcpu->mmio_is_write)
- dsisr |= DSISR_ISSTORE;
- kvmppc_core_queue_data_storage(vcpu, vcpu->arch.vaddr_accessed, dsisr);
- } else {
- /*
- * BookE does not send a SIGBUS on a bad
- * fault, so use a Program interrupt instead
- * to avoid a fault loop.
- */
- kvmppc_core_queue_program(vcpu, 0);
- }
- r = RESUME_GUEST;
- break;
- }
- default:
- WARN_ON(1);
- r = RESUME_GUEST;
- }
- return r;
- }
- EXPORT_SYMBOL_GPL(kvmppc_emulate_mmio);
- int kvmppc_st(struct kvm_vcpu *vcpu, ulong *eaddr, int size, void *ptr,
- bool data)
- {
- ulong mp_pa = vcpu->arch.magic_page_pa & KVM_PAM & PAGE_MASK;
- struct kvmppc_pte pte;
- int r = -EINVAL;
- vcpu->stat.st++;
- if (vcpu->kvm->arch.kvm_ops && vcpu->kvm->arch.kvm_ops->store_to_eaddr)
- r = vcpu->kvm->arch.kvm_ops->store_to_eaddr(vcpu, eaddr, ptr,
- size);
- if ((!r) || (r == -EAGAIN))
- return r;
- r = kvmppc_xlate(vcpu, *eaddr, data ? XLATE_DATA : XLATE_INST,
- XLATE_WRITE, &pte);
- if (r < 0)
- return r;
- *eaddr = pte.raddr;
- if (!pte.may_write)
- return -EPERM;
- /* Magic page override */
- if (kvmppc_supports_magic_page(vcpu) && mp_pa &&
- ((pte.raddr & KVM_PAM & PAGE_MASK) == mp_pa) &&
- !(kvmppc_get_msr(vcpu) & MSR_PR)) {
- void *magic = vcpu->arch.shared;
- magic += pte.eaddr & 0xfff;
- memcpy(magic, ptr, size);
- return EMULATE_DONE;
- }
- if (kvm_write_guest(vcpu->kvm, pte.raddr, ptr, size))
- return EMULATE_DO_MMIO;
- return EMULATE_DONE;
- }
- EXPORT_SYMBOL_GPL(kvmppc_st);
- int kvmppc_ld(struct kvm_vcpu *vcpu, ulong *eaddr, int size, void *ptr,
- bool data)
- {
- ulong mp_pa = vcpu->arch.magic_page_pa & KVM_PAM & PAGE_MASK;
- struct kvmppc_pte pte;
- int rc = -EINVAL;
- vcpu->stat.ld++;
- if (vcpu->kvm->arch.kvm_ops && vcpu->kvm->arch.kvm_ops->load_from_eaddr)
- rc = vcpu->kvm->arch.kvm_ops->load_from_eaddr(vcpu, eaddr, ptr,
- size);
- if ((!rc) || (rc == -EAGAIN))
- return rc;
- rc = kvmppc_xlate(vcpu, *eaddr, data ? XLATE_DATA : XLATE_INST,
- XLATE_READ, &pte);
- if (rc)
- return rc;
- *eaddr = pte.raddr;
- if (!pte.may_read)
- return -EPERM;
- if (!data && !pte.may_execute)
- return -ENOEXEC;
- /* Magic page override */
- if (kvmppc_supports_magic_page(vcpu) && mp_pa &&
- ((pte.raddr & KVM_PAM & PAGE_MASK) == mp_pa) &&
- !(kvmppc_get_msr(vcpu) & MSR_PR)) {
- void *magic = vcpu->arch.shared;
- magic += pte.eaddr & 0xfff;
- memcpy(ptr, magic, size);
- return EMULATE_DONE;
- }
- kvm_vcpu_srcu_read_lock(vcpu);
- rc = kvm_read_guest(vcpu->kvm, pte.raddr, ptr, size);
- kvm_vcpu_srcu_read_unlock(vcpu);
- if (rc)
- return EMULATE_DO_MMIO;
- return EMULATE_DONE;
- }
- EXPORT_SYMBOL_GPL(kvmppc_ld);
- int kvm_arch_hardware_enable(void)
- {
- return 0;
- }
- int kvm_arch_hardware_setup(void *opaque)
- {
- return 0;
- }
- int kvm_arch_check_processor_compat(void *opaque)
- {
- return kvmppc_core_check_processor_compat();
- }
- int kvm_arch_init_vm(struct kvm *kvm, unsigned long type)
- {
- struct kvmppc_ops *kvm_ops = NULL;
- int r;
- /*
- * 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 (!try_module_get(kvm_ops->owner))
- return -ENOENT;
- kvm->arch.kvm_ops = kvm_ops;
- r = kvmppc_core_init_vm(kvm);
- if (r)
- module_put(kvm_ops->owner);
- return r;
- err_out:
- return -EINVAL;
- }
- void kvm_arch_destroy_vm(struct kvm *kvm)
- {
- #ifdef CONFIG_KVM_XICS
- /*
- * We call kick_all_cpus_sync() to ensure that all
- * CPUs have executed any pending IPIs before we
- * continue and free VCPUs structures below.
- */
- if (is_kvmppc_hv_enabled(kvm))
- kick_all_cpus_sync();
- #endif
- kvm_destroy_vcpus(kvm);
- mutex_lock(&kvm->lock);
- kvmppc_core_destroy_vm(kvm);
- mutex_unlock(&kvm->lock);
- /* drop the module reference */
- module_put(kvm->arch.kvm_ops->owner);
- }
- int kvm_vm_ioctl_check_extension(struct kvm *kvm, long ext)
- {
- int r;
- /* Assume we're using HV mode when the HV module is loaded */
- int hv_enabled = kvmppc_hv_ops ? 1 : 0;
- if (kvm) {
- /*
- * Hooray - we know which VM type we're running on. Depend on
- * that rather than the guess above.
- */
- hv_enabled = is_kvmppc_hv_enabled(kvm);
- }
- 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:
- case KVM_CAP_IMMEDIATE_EXIT:
- case KVM_CAP_SET_GUEST_DEBUG:
- r = 1;
- break;
- case KVM_CAP_PPC_GUEST_DEBUG_SSTEP:
- 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_MPIC
- case KVM_CAP_IRQ_MPIC:
- r = 1;
- break;
- #endif
- #ifdef CONFIG_PPC_BOOK3S_64
- case KVM_CAP_SPAPR_TCE:
- case KVM_CAP_SPAPR_TCE_64:
- r = 1;
- break;
- case KVM_CAP_SPAPR_TCE_VFIO:
- r = !!cpu_has_feature(CPU_FTR_HVMODE);
- break;
- case KVM_CAP_PPC_RTAS:
- case KVM_CAP_PPC_FIXUP_HCALL:
- case KVM_CAP_PPC_ENABLE_HCALL:
- #ifdef CONFIG_KVM_XICS
- case KVM_CAP_IRQ_XICS:
- #endif
- case KVM_CAP_PPC_GET_CPU_CHAR:
- r = 1;
- break;
- #ifdef CONFIG_KVM_XIVE
- case KVM_CAP_PPC_IRQ_XIVE:
- /*
- * We need XIVE to be enabled on the platform (implies
- * a POWER9 processor) and the PowerNV platform, as
- * nested is not yet supported.
- */
- r = xive_enabled() && !!cpu_has_feature(CPU_FTR_HVMODE) &&
- kvmppc_xive_native_supported();
- break;
- #endif
- case KVM_CAP_PPC_ALLOC_HTAB:
- r = hv_enabled;
- break;
- #endif /* CONFIG_PPC_BOOK3S_64 */
- #ifdef CONFIG_KVM_BOOK3S_HV_POSSIBLE
- case KVM_CAP_PPC_SMT:
- r = 0;
- if (kvm) {
- if (kvm->arch.emul_smt_mode > 1)
- r = kvm->arch.emul_smt_mode;
- else
- r = kvm->arch.smt_mode;
- } else if (hv_enabled) {
- if (cpu_has_feature(CPU_FTR_ARCH_300))
- r = 1;
- else
- r = threads_per_subcore;
- }
- break;
- case KVM_CAP_PPC_SMT_POSSIBLE:
- r = 1;
- if (hv_enabled) {
- if (!cpu_has_feature(CPU_FTR_ARCH_300))
- r = ((threads_per_subcore << 1) - 1);
- else
- /* P9 can emulate dbells, so allow any mode */
- r = 8 | 4 | 2 | 1;
- }
- break;
- case KVM_CAP_PPC_RMA:
- r = 0;
- break;
- case KVM_CAP_PPC_HWRNG:
- r = kvmppc_hwrng_present();
- break;
- case KVM_CAP_PPC_MMU_RADIX:
- r = !!(hv_enabled && radix_enabled());
- break;
- case KVM_CAP_PPC_MMU_HASH_V3:
- r = !!(hv_enabled && kvmppc_hv_ops->hash_v3_possible &&
- kvmppc_hv_ops->hash_v3_possible());
- break;
- case KVM_CAP_PPC_NESTED_HV:
- r = !!(hv_enabled && kvmppc_hv_ops->enable_nested &&
- !kvmppc_hv_ops->enable_nested(NULL));
- break;
- #endif
- case KVM_CAP_SYNC_MMU:
- #ifdef CONFIG_KVM_BOOK3S_HV_POSSIBLE
- r = hv_enabled;
- #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 = min_t(unsigned int, num_present_cpus(), KVM_MAX_VCPUS);
- else
- r = min_t(unsigned int, num_online_cpus(), KVM_MAX_VCPUS);
- break;
- case KVM_CAP_MAX_VCPUS:
- r = KVM_MAX_VCPUS;
- break;
- case KVM_CAP_MAX_VCPU_ID:
- r = KVM_MAX_VCPU_IDS;
- break;
- #ifdef CONFIG_PPC_BOOK3S_64
- case KVM_CAP_PPC_GET_SMMU_INFO:
- r = 1;
- break;
- case KVM_CAP_SPAPR_MULTITCE:
- r = 1;
- break;
- case KVM_CAP_SPAPR_RESIZE_HPT:
- r = !!hv_enabled;
- break;
- #endif
- #ifdef CONFIG_KVM_BOOK3S_HV_POSSIBLE
- case KVM_CAP_PPC_FWNMI:
- r = hv_enabled;
- break;
- #endif
- #ifdef CONFIG_PPC_TRANSACTIONAL_MEM
- case KVM_CAP_PPC_HTM:
- r = !!(cur_cpu_spec->cpu_user_features2 & PPC_FEATURE2_HTM) ||
- (hv_enabled && cpu_has_feature(CPU_FTR_P9_TM_HV_ASSIST));
- break;
- #endif
- #if defined(CONFIG_KVM_BOOK3S_HV_POSSIBLE)
- case KVM_CAP_PPC_SECURE_GUEST:
- r = hv_enabled && kvmppc_hv_ops->enable_svm &&
- !kvmppc_hv_ops->enable_svm(NULL);
- break;
- case KVM_CAP_PPC_DAWR1:
- r = !!(hv_enabled && kvmppc_hv_ops->enable_dawr1 &&
- !kvmppc_hv_ops->enable_dawr1(NULL));
- break;
- case KVM_CAP_PPC_RPT_INVALIDATE:
- r = 1;
- break;
- #endif
- case KVM_CAP_PPC_AIL_MODE_3:
- r = 0;
- /*
- * KVM PR, POWER7, and some POWER9s don't support AIL=3 mode.
- * The POWER9s can support it if the guest runs in hash mode,
- * but QEMU doesn't necessarily query the capability in time.
- */
- if (hv_enabled) {
- if (kvmhv_on_pseries()) {
- if (pseries_reloc_on_exception())
- r = 1;
- } else if (cpu_has_feature(CPU_FTR_ARCH_207S) &&
- !cpu_has_feature(CPU_FTR_P9_RADIX_PREFETCH_BUG)) {
- r = 1;
- }
- }
- break;
- 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 *slot)
- {
- kvmppc_core_free_memslot(kvm, slot);
- }
- int kvm_arch_prepare_memory_region(struct kvm *kvm,
- const struct kvm_memory_slot *old,
- struct kvm_memory_slot *new,
- enum kvm_mr_change change)
- {
- return kvmppc_core_prepare_memory_region(kvm, old, new, change);
- }
- void kvm_arch_commit_memory_region(struct kvm *kvm,
- struct kvm_memory_slot *old,
- const struct kvm_memory_slot *new,
- enum kvm_mr_change change)
- {
- kvmppc_core_commit_memory_region(kvm, old, new, change);
- }
- void kvm_arch_flush_shadow_memslot(struct kvm *kvm,
- struct kvm_memory_slot *slot)
- {
- kvmppc_core_flush_memslot(kvm, slot);
- }
- int kvm_arch_vcpu_precreate(struct kvm *kvm, unsigned int id)
- {
- return 0;
- }
- static enum hrtimer_restart kvmppc_decrementer_wakeup(struct hrtimer *timer)
- {
- struct kvm_vcpu *vcpu;
- vcpu = container_of(timer, struct kvm_vcpu, arch.dec_timer);
- kvmppc_decrementer_func(vcpu);
- return HRTIMER_NORESTART;
- }
- int kvm_arch_vcpu_create(struct kvm_vcpu *vcpu)
- {
- int err;
- hrtimer_init(&vcpu->arch.dec_timer, CLOCK_REALTIME, HRTIMER_MODE_ABS);
- vcpu->arch.dec_timer.function = kvmppc_decrementer_wakeup;
- #ifdef CONFIG_KVM_EXIT_TIMING
- mutex_init(&vcpu->arch.exit_timing_lock);
- #endif
- err = kvmppc_subarch_vcpu_init(vcpu);
- if (err)
- return err;
- err = kvmppc_core_vcpu_create(vcpu);
- if (err)
- goto out_vcpu_uninit;
- rcuwait_init(&vcpu->arch.wait);
- vcpu->arch.waitp = &vcpu->arch.wait;
- return 0;
- out_vcpu_uninit:
- kvmppc_subarch_vcpu_uninit(vcpu);
- return err;
- }
- void kvm_arch_vcpu_postcreate(struct kvm_vcpu *vcpu)
- {
- }
- void kvm_arch_vcpu_destroy(struct kvm_vcpu *vcpu)
- {
- /* Make sure we're not using the vcpu anymore */
- hrtimer_cancel(&vcpu->arch.dec_timer);
- switch (vcpu->arch.irq_type) {
- case KVMPPC_IRQ_MPIC:
- kvmppc_mpic_disconnect_vcpu(vcpu->arch.mpic, vcpu);
- break;
- case KVMPPC_IRQ_XICS:
- if (xics_on_xive())
- kvmppc_xive_cleanup_vcpu(vcpu);
- else
- kvmppc_xics_free_icp(vcpu);
- break;
- case KVMPPC_IRQ_XIVE:
- kvmppc_xive_native_cleanup_vcpu(vcpu);
- break;
- }
- kvmppc_core_vcpu_free(vcpu);
- kvmppc_subarch_vcpu_uninit(vcpu);
- }
- int kvm_cpu_has_pending_timer(struct kvm_vcpu *vcpu)
- {
- return kvmppc_core_pending_dec(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
- }
- /*
- * irq_bypass_add_producer and irq_bypass_del_producer are only
- * useful if the architecture supports PCI passthrough.
- * irq_bypass_stop and irq_bypass_start are not needed and so
- * kvm_ops are not defined for them.
- */
- bool kvm_arch_has_irq_bypass(void)
- {
- return ((kvmppc_hv_ops && kvmppc_hv_ops->irq_bypass_add_producer) ||
- (kvmppc_pr_ops && kvmppc_pr_ops->irq_bypass_add_producer));
- }
- int kvm_arch_irq_bypass_add_producer(struct irq_bypass_consumer *cons,
- struct irq_bypass_producer *prod)
- {
- struct kvm_kernel_irqfd *irqfd =
- container_of(cons, struct kvm_kernel_irqfd, consumer);
- struct kvm *kvm = irqfd->kvm;
- if (kvm->arch.kvm_ops->irq_bypass_add_producer)
- return kvm->arch.kvm_ops->irq_bypass_add_producer(cons, prod);
- return 0;
- }
- void kvm_arch_irq_bypass_del_producer(struct irq_bypass_consumer *cons,
- struct irq_bypass_producer *prod)
- {
- struct kvm_kernel_irqfd *irqfd =
- container_of(cons, struct kvm_kernel_irqfd, consumer);
- struct kvm *kvm = irqfd->kvm;
- if (kvm->arch.kvm_ops->irq_bypass_del_producer)
- kvm->arch.kvm_ops->irq_bypass_del_producer(cons, prod);
- }
- #ifdef CONFIG_VSX
- static inline int kvmppc_get_vsr_dword_offset(int index)
- {
- int offset;
- if ((index != 0) && (index != 1))
- return -1;
- #ifdef __BIG_ENDIAN
- offset = index;
- #else
- offset = 1 - index;
- #endif
- return offset;
- }
- static inline int kvmppc_get_vsr_word_offset(int index)
- {
- int offset;
- if ((index > 3) || (index < 0))
- return -1;
- #ifdef __BIG_ENDIAN
- offset = index;
- #else
- offset = 3 - index;
- #endif
- return offset;
- }
- static inline void kvmppc_set_vsr_dword(struct kvm_vcpu *vcpu,
- u64 gpr)
- {
- union kvmppc_one_reg val;
- int offset = kvmppc_get_vsr_dword_offset(vcpu->arch.mmio_vsx_offset);
- int index = vcpu->arch.io_gpr & KVM_MMIO_REG_MASK;
- if (offset == -1)
- return;
- if (index >= 32) {
- val.vval = VCPU_VSX_VR(vcpu, index - 32);
- val.vsxval[offset] = gpr;
- VCPU_VSX_VR(vcpu, index - 32) = val.vval;
- } else {
- VCPU_VSX_FPR(vcpu, index, offset) = gpr;
- }
- }
- static inline void kvmppc_set_vsr_dword_dump(struct kvm_vcpu *vcpu,
- u64 gpr)
- {
- union kvmppc_one_reg val;
- int index = vcpu->arch.io_gpr & KVM_MMIO_REG_MASK;
- if (index >= 32) {
- val.vval = VCPU_VSX_VR(vcpu, index - 32);
- val.vsxval[0] = gpr;
- val.vsxval[1] = gpr;
- VCPU_VSX_VR(vcpu, index - 32) = val.vval;
- } else {
- VCPU_VSX_FPR(vcpu, index, 0) = gpr;
- VCPU_VSX_FPR(vcpu, index, 1) = gpr;
- }
- }
- static inline void kvmppc_set_vsr_word_dump(struct kvm_vcpu *vcpu,
- u32 gpr)
- {
- union kvmppc_one_reg val;
- int index = vcpu->arch.io_gpr & KVM_MMIO_REG_MASK;
- if (index >= 32) {
- val.vsx32val[0] = gpr;
- val.vsx32val[1] = gpr;
- val.vsx32val[2] = gpr;
- val.vsx32val[3] = gpr;
- VCPU_VSX_VR(vcpu, index - 32) = val.vval;
- } else {
- val.vsx32val[0] = gpr;
- val.vsx32val[1] = gpr;
- VCPU_VSX_FPR(vcpu, index, 0) = val.vsxval[0];
- VCPU_VSX_FPR(vcpu, index, 1) = val.vsxval[0];
- }
- }
- static inline void kvmppc_set_vsr_word(struct kvm_vcpu *vcpu,
- u32 gpr32)
- {
- union kvmppc_one_reg val;
- int offset = kvmppc_get_vsr_word_offset(vcpu->arch.mmio_vsx_offset);
- int index = vcpu->arch.io_gpr & KVM_MMIO_REG_MASK;
- int dword_offset, word_offset;
- if (offset == -1)
- return;
- if (index >= 32) {
- val.vval = VCPU_VSX_VR(vcpu, index - 32);
- val.vsx32val[offset] = gpr32;
- VCPU_VSX_VR(vcpu, index - 32) = val.vval;
- } else {
- dword_offset = offset / 2;
- word_offset = offset % 2;
- val.vsxval[0] = VCPU_VSX_FPR(vcpu, index, dword_offset);
- val.vsx32val[word_offset] = gpr32;
- VCPU_VSX_FPR(vcpu, index, dword_offset) = val.vsxval[0];
- }
- }
- #endif /* CONFIG_VSX */
- #ifdef CONFIG_ALTIVEC
- static inline int kvmppc_get_vmx_offset_generic(struct kvm_vcpu *vcpu,
- int index, int element_size)
- {
- int offset;
- int elts = sizeof(vector128)/element_size;
- if ((index < 0) || (index >= elts))
- return -1;
- if (kvmppc_need_byteswap(vcpu))
- offset = elts - index - 1;
- else
- offset = index;
- return offset;
- }
- static inline int kvmppc_get_vmx_dword_offset(struct kvm_vcpu *vcpu,
- int index)
- {
- return kvmppc_get_vmx_offset_generic(vcpu, index, 8);
- }
- static inline int kvmppc_get_vmx_word_offset(struct kvm_vcpu *vcpu,
- int index)
- {
- return kvmppc_get_vmx_offset_generic(vcpu, index, 4);
- }
- static inline int kvmppc_get_vmx_hword_offset(struct kvm_vcpu *vcpu,
- int index)
- {
- return kvmppc_get_vmx_offset_generic(vcpu, index, 2);
- }
- static inline int kvmppc_get_vmx_byte_offset(struct kvm_vcpu *vcpu,
- int index)
- {
- return kvmppc_get_vmx_offset_generic(vcpu, index, 1);
- }
- static inline void kvmppc_set_vmx_dword(struct kvm_vcpu *vcpu,
- u64 gpr)
- {
- union kvmppc_one_reg val;
- int offset = kvmppc_get_vmx_dword_offset(vcpu,
- vcpu->arch.mmio_vmx_offset);
- int index = vcpu->arch.io_gpr & KVM_MMIO_REG_MASK;
- if (offset == -1)
- return;
- val.vval = VCPU_VSX_VR(vcpu, index);
- val.vsxval[offset] = gpr;
- VCPU_VSX_VR(vcpu, index) = val.vval;
- }
- static inline void kvmppc_set_vmx_word(struct kvm_vcpu *vcpu,
- u32 gpr32)
- {
- union kvmppc_one_reg val;
- int offset = kvmppc_get_vmx_word_offset(vcpu,
- vcpu->arch.mmio_vmx_offset);
- int index = vcpu->arch.io_gpr & KVM_MMIO_REG_MASK;
- if (offset == -1)
- return;
- val.vval = VCPU_VSX_VR(vcpu, index);
- val.vsx32val[offset] = gpr32;
- VCPU_VSX_VR(vcpu, index) = val.vval;
- }
- static inline void kvmppc_set_vmx_hword(struct kvm_vcpu *vcpu,
- u16 gpr16)
- {
- union kvmppc_one_reg val;
- int offset = kvmppc_get_vmx_hword_offset(vcpu,
- vcpu->arch.mmio_vmx_offset);
- int index = vcpu->arch.io_gpr & KVM_MMIO_REG_MASK;
- if (offset == -1)
- return;
- val.vval = VCPU_VSX_VR(vcpu, index);
- val.vsx16val[offset] = gpr16;
- VCPU_VSX_VR(vcpu, index) = val.vval;
- }
- static inline void kvmppc_set_vmx_byte(struct kvm_vcpu *vcpu,
- u8 gpr8)
- {
- union kvmppc_one_reg val;
- int offset = kvmppc_get_vmx_byte_offset(vcpu,
- vcpu->arch.mmio_vmx_offset);
- int index = vcpu->arch.io_gpr & KVM_MMIO_REG_MASK;
- if (offset == -1)
- return;
- val.vval = VCPU_VSX_VR(vcpu, index);
- val.vsx8val[offset] = gpr8;
- VCPU_VSX_VR(vcpu, index) = val.vval;
- }
- #endif /* CONFIG_ALTIVEC */
- #ifdef CONFIG_PPC_FPU
- static inline u64 sp_to_dp(u32 fprs)
- {
- u64 fprd;
- preempt_disable();
- enable_kernel_fp();
- asm ("lfs%U1%X1 0,%1; stfd%U0%X0 0,%0" : "=m<>" (fprd) : "m<>" (fprs)
- : "fr0");
- preempt_enable();
- return fprd;
- }
- static inline u32 dp_to_sp(u64 fprd)
- {
- u32 fprs;
- preempt_disable();
- enable_kernel_fp();
- asm ("lfd%U1%X1 0,%1; stfs%U0%X0 0,%0" : "=m<>" (fprs) : "m<>" (fprd)
- : "fr0");
- preempt_enable();
- return fprs;
- }
- #else
- #define sp_to_dp(x) (x)
- #define dp_to_sp(x) (x)
- #endif /* CONFIG_PPC_FPU */
- static void kvmppc_complete_mmio_load(struct kvm_vcpu *vcpu)
- {
- struct kvm_run *run = vcpu->run;
- u64 gpr;
- if (run->mmio.len > sizeof(gpr))
- return;
- if (!vcpu->arch.mmio_host_swabbed) {
- 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 {
- switch (run->mmio.len) {
- case 8: gpr = swab64(*(u64 *)run->mmio.data); break;
- case 4: gpr = swab32(*(u32 *)run->mmio.data); break;
- case 2: gpr = swab16(*(u16 *)run->mmio.data); break;
- case 1: gpr = *(u8 *)run->mmio.data; break;
- }
- }
- /* conversion between single and double precision */
- if ((vcpu->arch.mmio_sp64_extend) && (run->mmio.len == 4))
- gpr = sp_to_dp(gpr);
- 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;
- }
- }
- 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:
- if (vcpu->kvm->arch.kvm_ops->giveup_ext)
- vcpu->kvm->arch.kvm_ops->giveup_ext(vcpu, MSR_FP);
- 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
- #ifdef CONFIG_VSX
- case KVM_MMIO_REG_VSX:
- if (vcpu->kvm->arch.kvm_ops->giveup_ext)
- vcpu->kvm->arch.kvm_ops->giveup_ext(vcpu, MSR_VSX);
- if (vcpu->arch.mmio_copy_type == KVMPPC_VSX_COPY_DWORD)
- kvmppc_set_vsr_dword(vcpu, gpr);
- else if (vcpu->arch.mmio_copy_type == KVMPPC_VSX_COPY_WORD)
- kvmppc_set_vsr_word(vcpu, gpr);
- else if (vcpu->arch.mmio_copy_type ==
- KVMPPC_VSX_COPY_DWORD_LOAD_DUMP)
- kvmppc_set_vsr_dword_dump(vcpu, gpr);
- else if (vcpu->arch.mmio_copy_type ==
- KVMPPC_VSX_COPY_WORD_LOAD_DUMP)
- kvmppc_set_vsr_word_dump(vcpu, gpr);
- break;
- #endif
- #ifdef CONFIG_ALTIVEC
- case KVM_MMIO_REG_VMX:
- if (vcpu->kvm->arch.kvm_ops->giveup_ext)
- vcpu->kvm->arch.kvm_ops->giveup_ext(vcpu, MSR_VEC);
- if (vcpu->arch.mmio_copy_type == KVMPPC_VMX_COPY_DWORD)
- kvmppc_set_vmx_dword(vcpu, gpr);
- else if (vcpu->arch.mmio_copy_type == KVMPPC_VMX_COPY_WORD)
- kvmppc_set_vmx_word(vcpu, gpr);
- else if (vcpu->arch.mmio_copy_type ==
- KVMPPC_VMX_COPY_HWORD)
- kvmppc_set_vmx_hword(vcpu, gpr);
- else if (vcpu->arch.mmio_copy_type ==
- KVMPPC_VMX_COPY_BYTE)
- kvmppc_set_vmx_byte(vcpu, gpr);
- break;
- #endif
- #ifdef CONFIG_KVM_BOOK3S_HV_POSSIBLE
- case KVM_MMIO_REG_NESTED_GPR:
- if (kvmppc_need_byteswap(vcpu))
- gpr = swab64(gpr);
- kvm_vcpu_write_guest(vcpu, vcpu->arch.nested_io_gpr, &gpr,
- sizeof(gpr));
- break;
- #endif
- default:
- BUG();
- }
- }
- static int __kvmppc_handle_load(struct kvm_vcpu *vcpu,
- unsigned int rt, unsigned int bytes,
- int is_default_endian, int sign_extend)
- {
- struct kvm_run *run = vcpu->run;
- int idx, ret;
- bool host_swabbed;
- /* Pity C doesn't have a logical XOR operator */
- if (kvmppc_need_byteswap(vcpu)) {
- host_swabbed = is_default_endian;
- } else {
- host_swabbed = !is_default_endian;
- }
- if (bytes > sizeof(run->mmio.data))
- return EMULATE_FAIL;
- 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_host_swabbed = host_swabbed;
- vcpu->mmio_needed = 1;
- vcpu->mmio_is_write = 0;
- vcpu->arch.mmio_sign_extend = sign_extend;
- idx = srcu_read_lock(&vcpu->kvm->srcu);
- ret = kvm_io_bus_read(vcpu, 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);
- vcpu->mmio_needed = 0;
- return EMULATE_DONE;
- }
- return EMULATE_DO_MMIO;
- }
- int kvmppc_handle_load(struct kvm_vcpu *vcpu,
- unsigned int rt, unsigned int bytes,
- int is_default_endian)
- {
- return __kvmppc_handle_load(vcpu, rt, bytes, is_default_endian, 0);
- }
- EXPORT_SYMBOL_GPL(kvmppc_handle_load);
- /* Same as above, but sign extends */
- int kvmppc_handle_loads(struct kvm_vcpu *vcpu,
- unsigned int rt, unsigned int bytes,
- int is_default_endian)
- {
- return __kvmppc_handle_load(vcpu, rt, bytes, is_default_endian, 1);
- }
- #ifdef CONFIG_VSX
- int kvmppc_handle_vsx_load(struct kvm_vcpu *vcpu,
- unsigned int rt, unsigned int bytes,
- int is_default_endian, int mmio_sign_extend)
- {
- enum emulation_result emulated = EMULATE_DONE;
- /* Currently, mmio_vsx_copy_nums only allowed to be 4 or less */
- if (vcpu->arch.mmio_vsx_copy_nums > 4)
- return EMULATE_FAIL;
- while (vcpu->arch.mmio_vsx_copy_nums) {
- emulated = __kvmppc_handle_load(vcpu, rt, bytes,
- is_default_endian, mmio_sign_extend);
- if (emulated != EMULATE_DONE)
- break;
- vcpu->arch.paddr_accessed += vcpu->run->mmio.len;
- vcpu->arch.mmio_vsx_copy_nums--;
- vcpu->arch.mmio_vsx_offset++;
- }
- return emulated;
- }
- #endif /* CONFIG_VSX */
- int kvmppc_handle_store(struct kvm_vcpu *vcpu,
- u64 val, unsigned int bytes, int is_default_endian)
- {
- struct kvm_run *run = vcpu->run;
- void *data = run->mmio.data;
- int idx, ret;
- bool host_swabbed;
- /* Pity C doesn't have a logical XOR operator */
- if (kvmppc_need_byteswap(vcpu)) {
- host_swabbed = is_default_endian;
- } else {
- host_swabbed = !is_default_endian;
- }
- if (bytes > sizeof(run->mmio.data))
- return EMULATE_FAIL;
- 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;
- if ((vcpu->arch.mmio_sp64_extend) && (bytes == 4))
- val = dp_to_sp(val);
- /* Store the value at the lowest bytes in 'data'. */
- if (!host_swabbed) {
- 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 {
- switch (bytes) {
- case 8: *(u64 *)data = swab64(val); break;
- case 4: *(u32 *)data = swab32(val); break;
- case 2: *(u16 *)data = swab16(val); break;
- case 1: *(u8 *)data = val; break;
- }
- }
- idx = srcu_read_lock(&vcpu->kvm->srcu);
- ret = kvm_io_bus_write(vcpu, 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);
- #ifdef CONFIG_VSX
- static inline int kvmppc_get_vsr_data(struct kvm_vcpu *vcpu, int rs, u64 *val)
- {
- u32 dword_offset, word_offset;
- union kvmppc_one_reg reg;
- int vsx_offset = 0;
- int copy_type = vcpu->arch.mmio_copy_type;
- int result = 0;
- switch (copy_type) {
- case KVMPPC_VSX_COPY_DWORD:
- vsx_offset =
- kvmppc_get_vsr_dword_offset(vcpu->arch.mmio_vsx_offset);
- if (vsx_offset == -1) {
- result = -1;
- break;
- }
- if (rs < 32) {
- *val = VCPU_VSX_FPR(vcpu, rs, vsx_offset);
- } else {
- reg.vval = VCPU_VSX_VR(vcpu, rs - 32);
- *val = reg.vsxval[vsx_offset];
- }
- break;
- case KVMPPC_VSX_COPY_WORD:
- vsx_offset =
- kvmppc_get_vsr_word_offset(vcpu->arch.mmio_vsx_offset);
- if (vsx_offset == -1) {
- result = -1;
- break;
- }
- if (rs < 32) {
- dword_offset = vsx_offset / 2;
- word_offset = vsx_offset % 2;
- reg.vsxval[0] = VCPU_VSX_FPR(vcpu, rs, dword_offset);
- *val = reg.vsx32val[word_offset];
- } else {
- reg.vval = VCPU_VSX_VR(vcpu, rs - 32);
- *val = reg.vsx32val[vsx_offset];
- }
- break;
- default:
- result = -1;
- break;
- }
- return result;
- }
- int kvmppc_handle_vsx_store(struct kvm_vcpu *vcpu,
- int rs, unsigned int bytes, int is_default_endian)
- {
- u64 val;
- enum emulation_result emulated = EMULATE_DONE;
- vcpu->arch.io_gpr = rs;
- /* Currently, mmio_vsx_copy_nums only allowed to be 4 or less */
- if (vcpu->arch.mmio_vsx_copy_nums > 4)
- return EMULATE_FAIL;
- while (vcpu->arch.mmio_vsx_copy_nums) {
- if (kvmppc_get_vsr_data(vcpu, rs, &val) == -1)
- return EMULATE_FAIL;
- emulated = kvmppc_handle_store(vcpu,
- val, bytes, is_default_endian);
- if (emulated != EMULATE_DONE)
- break;
- vcpu->arch.paddr_accessed += vcpu->run->mmio.len;
- vcpu->arch.mmio_vsx_copy_nums--;
- vcpu->arch.mmio_vsx_offset++;
- }
- return emulated;
- }
- static int kvmppc_emulate_mmio_vsx_loadstore(struct kvm_vcpu *vcpu)
- {
- struct kvm_run *run = vcpu->run;
- enum emulation_result emulated = EMULATE_FAIL;
- int r;
- vcpu->arch.paddr_accessed += run->mmio.len;
- if (!vcpu->mmio_is_write) {
- emulated = kvmppc_handle_vsx_load(vcpu, vcpu->arch.io_gpr,
- run->mmio.len, 1, vcpu->arch.mmio_sign_extend);
- } else {
- emulated = kvmppc_handle_vsx_store(vcpu,
- vcpu->arch.io_gpr, run->mmio.len, 1);
- }
- switch (emulated) {
- case EMULATE_DO_MMIO:
- run->exit_reason = KVM_EXIT_MMIO;
- r = RESUME_HOST;
- break;
- case EMULATE_FAIL:
- pr_info("KVM: MMIO emulation failed (VSX repeat)\n");
- run->exit_reason = KVM_EXIT_INTERNAL_ERROR;
- run->internal.suberror = KVM_INTERNAL_ERROR_EMULATION;
- r = RESUME_HOST;
- break;
- default:
- r = RESUME_GUEST;
- break;
- }
- return r;
- }
- #endif /* CONFIG_VSX */
- #ifdef CONFIG_ALTIVEC
- int kvmppc_handle_vmx_load(struct kvm_vcpu *vcpu,
- unsigned int rt, unsigned int bytes, int is_default_endian)
- {
- enum emulation_result emulated = EMULATE_DONE;
- if (vcpu->arch.mmio_vmx_copy_nums > 2)
- return EMULATE_FAIL;
- while (vcpu->arch.mmio_vmx_copy_nums) {
- emulated = __kvmppc_handle_load(vcpu, rt, bytes,
- is_default_endian, 0);
- if (emulated != EMULATE_DONE)
- break;
- vcpu->arch.paddr_accessed += vcpu->run->mmio.len;
- vcpu->arch.mmio_vmx_copy_nums--;
- vcpu->arch.mmio_vmx_offset++;
- }
- return emulated;
- }
- static int kvmppc_get_vmx_dword(struct kvm_vcpu *vcpu, int index, u64 *val)
- {
- union kvmppc_one_reg reg;
- int vmx_offset = 0;
- int result = 0;
- vmx_offset =
- kvmppc_get_vmx_dword_offset(vcpu, vcpu->arch.mmio_vmx_offset);
- if (vmx_offset == -1)
- return -1;
- reg.vval = VCPU_VSX_VR(vcpu, index);
- *val = reg.vsxval[vmx_offset];
- return result;
- }
- static int kvmppc_get_vmx_word(struct kvm_vcpu *vcpu, int index, u64 *val)
- {
- union kvmppc_one_reg reg;
- int vmx_offset = 0;
- int result = 0;
- vmx_offset =
- kvmppc_get_vmx_word_offset(vcpu, vcpu->arch.mmio_vmx_offset);
- if (vmx_offset == -1)
- return -1;
- reg.vval = VCPU_VSX_VR(vcpu, index);
- *val = reg.vsx32val[vmx_offset];
- return result;
- }
- static int kvmppc_get_vmx_hword(struct kvm_vcpu *vcpu, int index, u64 *val)
- {
- union kvmppc_one_reg reg;
- int vmx_offset = 0;
- int result = 0;
- vmx_offset =
- kvmppc_get_vmx_hword_offset(vcpu, vcpu->arch.mmio_vmx_offset);
- if (vmx_offset == -1)
- return -1;
- reg.vval = VCPU_VSX_VR(vcpu, index);
- *val = reg.vsx16val[vmx_offset];
- return result;
- }
- static int kvmppc_get_vmx_byte(struct kvm_vcpu *vcpu, int index, u64 *val)
- {
- union kvmppc_one_reg reg;
- int vmx_offset = 0;
- int result = 0;
- vmx_offset =
- kvmppc_get_vmx_byte_offset(vcpu, vcpu->arch.mmio_vmx_offset);
- if (vmx_offset == -1)
- return -1;
- reg.vval = VCPU_VSX_VR(vcpu, index);
- *val = reg.vsx8val[vmx_offset];
- return result;
- }
- int kvmppc_handle_vmx_store(struct kvm_vcpu *vcpu,
- unsigned int rs, unsigned int bytes, int is_default_endian)
- {
- u64 val = 0;
- unsigned int index = rs & KVM_MMIO_REG_MASK;
- enum emulation_result emulated = EMULATE_DONE;
- if (vcpu->arch.mmio_vmx_copy_nums > 2)
- return EMULATE_FAIL;
- vcpu->arch.io_gpr = rs;
- while (vcpu->arch.mmio_vmx_copy_nums) {
- switch (vcpu->arch.mmio_copy_type) {
- case KVMPPC_VMX_COPY_DWORD:
- if (kvmppc_get_vmx_dword(vcpu, index, &val) == -1)
- return EMULATE_FAIL;
- break;
- case KVMPPC_VMX_COPY_WORD:
- if (kvmppc_get_vmx_word(vcpu, index, &val) == -1)
- return EMULATE_FAIL;
- break;
- case KVMPPC_VMX_COPY_HWORD:
- if (kvmppc_get_vmx_hword(vcpu, index, &val) == -1)
- return EMULATE_FAIL;
- break;
- case KVMPPC_VMX_COPY_BYTE:
- if (kvmppc_get_vmx_byte(vcpu, index, &val) == -1)
- return EMULATE_FAIL;
- break;
- default:
- return EMULATE_FAIL;
- }
- emulated = kvmppc_handle_store(vcpu, val, bytes,
- is_default_endian);
- if (emulated != EMULATE_DONE)
- break;
- vcpu->arch.paddr_accessed += vcpu->run->mmio.len;
- vcpu->arch.mmio_vmx_copy_nums--;
- vcpu->arch.mmio_vmx_offset++;
- }
- return emulated;
- }
- static int kvmppc_emulate_mmio_vmx_loadstore(struct kvm_vcpu *vcpu)
- {
- struct kvm_run *run = vcpu->run;
- enum emulation_result emulated = EMULATE_FAIL;
- int r;
- vcpu->arch.paddr_accessed += run->mmio.len;
- if (!vcpu->mmio_is_write) {
- emulated = kvmppc_handle_vmx_load(vcpu,
- vcpu->arch.io_gpr, run->mmio.len, 1);
- } else {
- emulated = kvmppc_handle_vmx_store(vcpu,
- vcpu->arch.io_gpr, run->mmio.len, 1);
- }
- switch (emulated) {
- case EMULATE_DO_MMIO:
- run->exit_reason = KVM_EXIT_MMIO;
- r = RESUME_HOST;
- break;
- case EMULATE_FAIL:
- pr_info("KVM: MMIO emulation failed (VMX repeat)\n");
- run->exit_reason = KVM_EXIT_INTERNAL_ERROR;
- run->internal.suberror = KVM_INTERNAL_ERROR_EMULATION;
- r = RESUME_HOST;
- break;
- default:
- r = RESUME_GUEST;
- break;
- }
- return r;
- }
- #endif /* CONFIG_ALTIVEC */
- int kvm_vcpu_ioctl_get_one_reg(struct kvm_vcpu *vcpu, struct kvm_one_reg *reg)
- {
- int r = 0;
- union kvmppc_one_reg val;
- int size;
- size = one_reg_size(reg->id);
- if (size > sizeof(val))
- return -EINVAL;
- r = kvmppc_get_one_reg(vcpu, reg->id, &val);
- if (r == -EINVAL) {
- r = 0;
- switch (reg->id) {
- #ifdef CONFIG_ALTIVEC
- case KVM_REG_PPC_VR0 ... KVM_REG_PPC_VR31:
- if (!cpu_has_feature(CPU_FTR_ALTIVEC)) {
- r = -ENXIO;
- break;
- }
- val.vval = vcpu->arch.vr.vr[reg->id - KVM_REG_PPC_VR0];
- break;
- case KVM_REG_PPC_VSCR:
- if (!cpu_has_feature(CPU_FTR_ALTIVEC)) {
- r = -ENXIO;
- break;
- }
- val = get_reg_val(reg->id, vcpu->arch.vr.vscr.u[3]);
- break;
- case KVM_REG_PPC_VRSAVE:
- val = get_reg_val(reg->id, vcpu->arch.vrsave);
- break;
- #endif /* CONFIG_ALTIVEC */
- default:
- r = -EINVAL;
- break;
- }
- }
- if (r)
- return r;
- if (copy_to_user((char __user *)(unsigned long)reg->addr, &val, size))
- r = -EFAULT;
- return r;
- }
- int kvm_vcpu_ioctl_set_one_reg(struct kvm_vcpu *vcpu, struct kvm_one_reg *reg)
- {
- int r;
- union kvmppc_one_reg val;
- int size;
- size = one_reg_size(reg->id);
- if (size > sizeof(val))
- return -EINVAL;
- if (copy_from_user(&val, (char __user *)(unsigned long)reg->addr, size))
- return -EFAULT;
- r = kvmppc_set_one_reg(vcpu, reg->id, &val);
- if (r == -EINVAL) {
- r = 0;
- switch (reg->id) {
- #ifdef CONFIG_ALTIVEC
- case KVM_REG_PPC_VR0 ... KVM_REG_PPC_VR31:
- if (!cpu_has_feature(CPU_FTR_ALTIVEC)) {
- r = -ENXIO;
- break;
- }
- vcpu->arch.vr.vr[reg->id - KVM_REG_PPC_VR0] = val.vval;
- break;
- case KVM_REG_PPC_VSCR:
- if (!cpu_has_feature(CPU_FTR_ALTIVEC)) {
- r = -ENXIO;
- break;
- }
- vcpu->arch.vr.vscr.u[3] = set_reg_val(reg->id, val);
- break;
- case KVM_REG_PPC_VRSAVE:
- if (!cpu_has_feature(CPU_FTR_ALTIVEC)) {
- r = -ENXIO;
- break;
- }
- vcpu->arch.vrsave = set_reg_val(reg->id, val);
- break;
- #endif /* CONFIG_ALTIVEC */
- default:
- r = -EINVAL;
- break;
- }
- }
- return r;
- }
- int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu)
- {
- struct kvm_run *run = vcpu->run;
- int r;
- vcpu_load(vcpu);
- if (vcpu->mmio_needed) {
- vcpu->mmio_needed = 0;
- if (!vcpu->mmio_is_write)
- kvmppc_complete_mmio_load(vcpu);
- #ifdef CONFIG_VSX
- if (vcpu->arch.mmio_vsx_copy_nums > 0) {
- vcpu->arch.mmio_vsx_copy_nums--;
- vcpu->arch.mmio_vsx_offset++;
- }
- if (vcpu->arch.mmio_vsx_copy_nums > 0) {
- r = kvmppc_emulate_mmio_vsx_loadstore(vcpu);
- if (r == RESUME_HOST) {
- vcpu->mmio_needed = 1;
- goto out;
- }
- }
- #endif
- #ifdef CONFIG_ALTIVEC
- if (vcpu->arch.mmio_vmx_copy_nums > 0) {
- vcpu->arch.mmio_vmx_copy_nums--;
- vcpu->arch.mmio_vmx_offset++;
- }
- if (vcpu->arch.mmio_vmx_copy_nums > 0) {
- r = kvmppc_emulate_mmio_vmx_loadstore(vcpu);
- if (r == RESUME_HOST) {
- vcpu->mmio_needed = 1;
- goto out;
- }
- }
- #endif
- } 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
- }
- kvm_sigset_activate(vcpu);
- if (run->immediate_exit)
- r = -EINTR;
- else
- r = kvmppc_vcpu_run(vcpu);
- kvm_sigset_deactivate(vcpu);
- #ifdef CONFIG_ALTIVEC
- out:
- #endif
- /*
- * We're already returning to userspace, don't pass the
- * RESUME_HOST flags along.
- */
- if (r > 0)
- r = 0;
- 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);
- 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) {
- if (xics_on_xive())
- r = kvmppc_xive_connect_vcpu(dev, vcpu, cap->args[1]);
- else
- r = kvmppc_xics_connect_vcpu(dev, vcpu, cap->args[1]);
- }
- fdput(f);
- break;
- }
- #endif /* CONFIG_KVM_XICS */
- #ifdef CONFIG_KVM_XIVE
- case KVM_CAP_PPC_IRQ_XIVE: {
- struct fd f;
- struct kvm_device *dev;
- r = -EBADF;
- f = fdget(cap->args[0]);
- if (!f.file)
- break;
- r = -ENXIO;
- if (!xive_enabled())
- break;
- r = -EPERM;
- dev = kvm_device_from_filp(f.file);
- if (dev)
- r = kvmppc_xive_native_connect_vcpu(dev, vcpu,
- cap->args[1]);
- fdput(f);
- break;
- }
- #endif /* CONFIG_KVM_XIVE */
- #ifdef CONFIG_KVM_BOOK3S_HV_POSSIBLE
- case KVM_CAP_PPC_FWNMI:
- r = -EINVAL;
- if (!is_kvmppc_hv_enabled(vcpu->kvm))
- break;
- r = 0;
- vcpu->kvm->arch.fwnmi_enabled = true;
- break;
- #endif /* CONFIG_KVM_BOOK3S_HV_POSSIBLE */
- default:
- r = -EINVAL;
- break;
- }
- if (!r)
- r = kvmppc_sanity_check(vcpu);
- return r;
- }
- bool kvm_arch_intc_initialized(struct kvm *kvm)
- {
- #ifdef CONFIG_KVM_MPIC
- if (kvm->arch.mpic)
- return true;
- #endif
- #ifdef CONFIG_KVM_XICS
- if (kvm->arch.xics || kvm->arch.xive)
- return true;
- #endif
- return false;
- }
- 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_async_ioctl(struct file *filp,
- unsigned int ioctl, unsigned long arg)
- {
- struct kvm_vcpu *vcpu = filp->private_data;
- void __user *argp = (void __user *)arg;
- if (ioctl == KVM_INTERRUPT) {
- struct kvm_interrupt irq;
- if (copy_from_user(&irq, argp, sizeof(irq)))
- return -EFAULT;
- return kvm_vcpu_ioctl_interrupt(vcpu, &irq);
- }
- return -ENOIOCTLCMD;
- }
- 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_ENABLE_CAP:
- {
- struct kvm_enable_cap cap;
- r = -EFAULT;
- if (copy_from_user(&cap, argp, sizeof(cap)))
- goto out;
- vcpu_load(vcpu);
- r = kvm_vcpu_ioctl_enable_cap(vcpu, &cap);
- vcpu_put(vcpu);
- 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;
- vcpu_load(vcpu);
- r = kvm_vcpu_ioctl_dirty_tlb(vcpu, &dirty);
- vcpu_put(vcpu);
- break;
- }
- #endif
- default:
- r = -EINVAL;
- }
- out:
- return r;
- }
- vm_fault_t 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;
- }
- int kvm_vm_ioctl_enable_cap(struct kvm *kvm,
- struct kvm_enable_cap *cap)
- {
- int r;
- if (cap->flags)
- return -EINVAL;
- switch (cap->cap) {
- #ifdef CONFIG_KVM_BOOK3S_64_HANDLER
- case KVM_CAP_PPC_ENABLE_HCALL: {
- unsigned long hcall = cap->args[0];
- r = -EINVAL;
- if (hcall > MAX_HCALL_OPCODE || (hcall & 3) ||
- cap->args[1] > 1)
- break;
- if (!kvmppc_book3s_hcall_implemented(kvm, hcall))
- break;
- if (cap->args[1])
- set_bit(hcall / 4, kvm->arch.enabled_hcalls);
- else
- clear_bit(hcall / 4, kvm->arch.enabled_hcalls);
- r = 0;
- break;
- }
- case KVM_CAP_PPC_SMT: {
- unsigned long mode = cap->args[0];
- unsigned long flags = cap->args[1];
- r = -EINVAL;
- if (kvm->arch.kvm_ops->set_smt_mode)
- r = kvm->arch.kvm_ops->set_smt_mode(kvm, mode, flags);
- break;
- }
- case KVM_CAP_PPC_NESTED_HV:
- r = -EINVAL;
- if (!is_kvmppc_hv_enabled(kvm) ||
- !kvm->arch.kvm_ops->enable_nested)
- break;
- r = kvm->arch.kvm_ops->enable_nested(kvm);
- break;
- #endif
- #if defined(CONFIG_KVM_BOOK3S_HV_POSSIBLE)
- case KVM_CAP_PPC_SECURE_GUEST:
- r = -EINVAL;
- if (!is_kvmppc_hv_enabled(kvm) || !kvm->arch.kvm_ops->enable_svm)
- break;
- r = kvm->arch.kvm_ops->enable_svm(kvm);
- break;
- case KVM_CAP_PPC_DAWR1:
- r = -EINVAL;
- if (!is_kvmppc_hv_enabled(kvm) || !kvm->arch.kvm_ops->enable_dawr1)
- break;
- r = kvm->arch.kvm_ops->enable_dawr1(kvm);
- break;
- #endif
- default:
- r = -EINVAL;
- break;
- }
- return r;
- }
- #ifdef CONFIG_PPC_BOOK3S_64
- /*
- * These functions check whether the underlying hardware is safe
- * against attacks based on observing the effects of speculatively
- * executed instructions, and whether it supplies instructions for
- * use in workarounds. The information comes from firmware, either
- * via the device tree on powernv platforms or from an hcall on
- * pseries platforms.
- */
- #ifdef CONFIG_PPC_PSERIES
- static int pseries_get_cpu_char(struct kvm_ppc_cpu_char *cp)
- {
- struct h_cpu_char_result c;
- unsigned long rc;
- if (!machine_is(pseries))
- return -ENOTTY;
- rc = plpar_get_cpu_characteristics(&c);
- if (rc == H_SUCCESS) {
- cp->character = c.character;
- cp->behaviour = c.behaviour;
- cp->character_mask = KVM_PPC_CPU_CHAR_SPEC_BAR_ORI31 |
- KVM_PPC_CPU_CHAR_BCCTRL_SERIALISED |
- KVM_PPC_CPU_CHAR_L1D_FLUSH_ORI30 |
- KVM_PPC_CPU_CHAR_L1D_FLUSH_TRIG2 |
- KVM_PPC_CPU_CHAR_L1D_THREAD_PRIV |
- KVM_PPC_CPU_CHAR_BR_HINT_HONOURED |
- KVM_PPC_CPU_CHAR_MTTRIG_THR_RECONF |
- KVM_PPC_CPU_CHAR_COUNT_CACHE_DIS |
- KVM_PPC_CPU_CHAR_BCCTR_FLUSH_ASSIST;
- cp->behaviour_mask = KVM_PPC_CPU_BEHAV_FAVOUR_SECURITY |
- KVM_PPC_CPU_BEHAV_L1D_FLUSH_PR |
- KVM_PPC_CPU_BEHAV_BNDS_CHK_SPEC_BAR |
- KVM_PPC_CPU_BEHAV_FLUSH_COUNT_CACHE;
- }
- return 0;
- }
- #else
- static int pseries_get_cpu_char(struct kvm_ppc_cpu_char *cp)
- {
- return -ENOTTY;
- }
- #endif
- static inline bool have_fw_feat(struct device_node *fw_features,
- const char *state, const char *name)
- {
- struct device_node *np;
- bool r = false;
- np = of_get_child_by_name(fw_features, name);
- if (np) {
- r = of_property_read_bool(np, state);
- of_node_put(np);
- }
- return r;
- }
- static int kvmppc_get_cpu_char(struct kvm_ppc_cpu_char *cp)
- {
- struct device_node *np, *fw_features;
- int r;
- memset(cp, 0, sizeof(*cp));
- r = pseries_get_cpu_char(cp);
- if (r != -ENOTTY)
- return r;
- np = of_find_node_by_name(NULL, "ibm,opal");
- if (np) {
- fw_features = of_get_child_by_name(np, "fw-features");
- of_node_put(np);
- if (!fw_features)
- return 0;
- if (have_fw_feat(fw_features, "enabled",
- "inst-spec-barrier-ori31,31,0"))
- cp->character |= KVM_PPC_CPU_CHAR_SPEC_BAR_ORI31;
- if (have_fw_feat(fw_features, "enabled",
- "fw-bcctrl-serialized"))
- cp->character |= KVM_PPC_CPU_CHAR_BCCTRL_SERIALISED;
- if (have_fw_feat(fw_features, "enabled",
- "inst-l1d-flush-ori30,30,0"))
- cp->character |= KVM_PPC_CPU_CHAR_L1D_FLUSH_ORI30;
- if (have_fw_feat(fw_features, "enabled",
- "inst-l1d-flush-trig2"))
- cp->character |= KVM_PPC_CPU_CHAR_L1D_FLUSH_TRIG2;
- if (have_fw_feat(fw_features, "enabled",
- "fw-l1d-thread-split"))
- cp->character |= KVM_PPC_CPU_CHAR_L1D_THREAD_PRIV;
- if (have_fw_feat(fw_features, "enabled",
- "fw-count-cache-disabled"))
- cp->character |= KVM_PPC_CPU_CHAR_COUNT_CACHE_DIS;
- if (have_fw_feat(fw_features, "enabled",
- "fw-count-cache-flush-bcctr2,0,0"))
- cp->character |= KVM_PPC_CPU_CHAR_BCCTR_FLUSH_ASSIST;
- cp->character_mask = KVM_PPC_CPU_CHAR_SPEC_BAR_ORI31 |
- KVM_PPC_CPU_CHAR_BCCTRL_SERIALISED |
- KVM_PPC_CPU_CHAR_L1D_FLUSH_ORI30 |
- KVM_PPC_CPU_CHAR_L1D_FLUSH_TRIG2 |
- KVM_PPC_CPU_CHAR_L1D_THREAD_PRIV |
- KVM_PPC_CPU_CHAR_COUNT_CACHE_DIS |
- KVM_PPC_CPU_CHAR_BCCTR_FLUSH_ASSIST;
- if (have_fw_feat(fw_features, "enabled",
- "speculation-policy-favor-security"))
- cp->behaviour |= KVM_PPC_CPU_BEHAV_FAVOUR_SECURITY;
- if (!have_fw_feat(fw_features, "disabled",
- "needs-l1d-flush-msr-pr-0-to-1"))
- cp->behaviour |= KVM_PPC_CPU_BEHAV_L1D_FLUSH_PR;
- if (!have_fw_feat(fw_features, "disabled",
- "needs-spec-barrier-for-bound-checks"))
- cp->behaviour |= KVM_PPC_CPU_BEHAV_BNDS_CHK_SPEC_BAR;
- if (have_fw_feat(fw_features, "enabled",
- "needs-count-cache-flush-on-context-switch"))
- cp->behaviour |= KVM_PPC_CPU_BEHAV_FLUSH_COUNT_CACHE;
- cp->behaviour_mask = KVM_PPC_CPU_BEHAV_FAVOUR_SECURITY |
- KVM_PPC_CPU_BEHAV_L1D_FLUSH_PR |
- KVM_PPC_CPU_BEHAV_BNDS_CHK_SPEC_BAR |
- KVM_PPC_CPU_BEHAV_FLUSH_COUNT_CACHE;
- of_node_put(fw_features);
- }
- return 0;
- }
- #endif
- 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_SPAPR_TCE_IOMMU
- case KVM_CREATE_SPAPR_TCE_64: {
- struct kvm_create_spapr_tce_64 create_tce_64;
- r = -EFAULT;
- if (copy_from_user(&create_tce_64, argp, sizeof(create_tce_64)))
- goto out;
- if (create_tce_64.flags) {
- r = -EINVAL;
- goto out;
- }
- r = kvm_vm_ioctl_create_spapr_tce(kvm, &create_tce_64);
- goto out;
- }
- case KVM_CREATE_SPAPR_TCE: {
- struct kvm_create_spapr_tce create_tce;
- struct kvm_create_spapr_tce_64 create_tce_64;
- r = -EFAULT;
- if (copy_from_user(&create_tce, argp, sizeof(create_tce)))
- goto out;
- create_tce_64.liobn = create_tce.liobn;
- create_tce_64.page_shift = IOMMU_PAGE_SHIFT_4K;
- create_tce_64.offset = 0;
- create_tce_64.size = create_tce.window_size >>
- IOMMU_PAGE_SHIFT_4K;
- create_tce_64.flags = 0;
- r = kvm_vm_ioctl_create_spapr_tce(kvm, &create_tce_64);
- goto out;
- }
- #endif
- #ifdef CONFIG_PPC_BOOK3S_64
- 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;
- }
- case KVM_PPC_CONFIGURE_V3_MMU: {
- struct kvm *kvm = filp->private_data;
- struct kvm_ppc_mmuv3_cfg cfg;
- r = -EINVAL;
- if (!kvm->arch.kvm_ops->configure_mmu)
- goto out;
- r = -EFAULT;
- if (copy_from_user(&cfg, argp, sizeof(cfg)))
- goto out;
- r = kvm->arch.kvm_ops->configure_mmu(kvm, &cfg);
- break;
- }
- case KVM_PPC_GET_RMMU_INFO: {
- struct kvm *kvm = filp->private_data;
- struct kvm_ppc_rmmu_info info;
- r = -EINVAL;
- if (!kvm->arch.kvm_ops->get_rmmu_info)
- goto out;
- r = kvm->arch.kvm_ops->get_rmmu_info(kvm, &info);
- if (r >= 0 && copy_to_user(argp, &info, sizeof(info)))
- r = -EFAULT;
- break;
- }
- case KVM_PPC_GET_CPU_CHAR: {
- struct kvm_ppc_cpu_char cpuchar;
- r = kvmppc_get_cpu_char(&cpuchar);
- if (r >= 0 && copy_to_user(argp, &cpuchar, sizeof(cpuchar)))
- r = -EFAULT;
- break;
- }
- case KVM_PPC_SVM_OFF: {
- struct kvm *kvm = filp->private_data;
- r = 0;
- if (!kvm->arch.kvm_ops->svm_off)
- goto out;
- r = kvm->arch.kvm_ops->svm_off(kvm);
- 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 DEFINE_IDA(lpid_inuse);
- static unsigned long nr_lpids;
- long kvmppc_alloc_lpid(void)
- {
- int lpid;
- /* The host LPID must always be 0 (allocation starts at 1) */
- lpid = ida_alloc_range(&lpid_inuse, 1, nr_lpids - 1, GFP_KERNEL);
- if (lpid < 0) {
- if (lpid == -ENOMEM)
- pr_err("%s: Out of memory\n", __func__);
- else
- pr_err("%s: No LPIDs free\n", __func__);
- return -ENOMEM;
- }
- return lpid;
- }
- EXPORT_SYMBOL_GPL(kvmppc_alloc_lpid);
- void kvmppc_free_lpid(long lpid)
- {
- ida_free(&lpid_inuse, lpid);
- }
- EXPORT_SYMBOL_GPL(kvmppc_free_lpid);
- /* nr_lpids_param includes the host LPID */
- void kvmppc_init_lpid(unsigned long nr_lpids_param)
- {
- nr_lpids = nr_lpids_param;
- }
- EXPORT_SYMBOL_GPL(kvmppc_init_lpid);
- int kvm_arch_init(void *opaque)
- {
- return 0;
- }
- EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_ppc_instr);
- void kvm_arch_create_vcpu_debugfs(struct kvm_vcpu *vcpu, struct dentry *debugfs_dentry)
- {
- if (vcpu->kvm->arch.kvm_ops->create_vcpu_debugfs)
- vcpu->kvm->arch.kvm_ops->create_vcpu_debugfs(vcpu, debugfs_dentry);
- }
- int kvm_arch_create_vm_debugfs(struct kvm *kvm)
- {
- if (kvm->arch.kvm_ops->create_vm_debugfs)
- kvm->arch.kvm_ops->create_vm_debugfs(kvm);
- return 0;
- }
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