/* * Copyright 2011 Paul Mackerras, IBM Corp. * Copyright (C) 2009. SUSE Linux Products GmbH. All rights reserved. * * Authors: * Paul Mackerras * Alexander Graf * Kevin Wolf * * Description: KVM functions specific to running on Book 3S * processors in hypervisor mode (specifically POWER7 and later). * * This file is derived from arch/powerpc/kvm/book3s.c, * by Alexander Graf . * * 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. */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include "book3s.h" #define CREATE_TRACE_POINTS #include "trace_hv.h" /* #define EXIT_DEBUG */ /* #define EXIT_DEBUG_SIMPLE */ /* #define EXIT_DEBUG_INT */ /* Used to indicate that a guest page fault needs to be handled */ #define RESUME_PAGE_FAULT (RESUME_GUEST | RESUME_FLAG_ARCH1) /* Used as a "null" value for timebase values */ #define TB_NIL (~(u64)0) static DECLARE_BITMAP(default_enabled_hcalls, MAX_HCALL_OPCODE/4 + 1); #if defined(CONFIG_PPC_64K_PAGES) #define MPP_BUFFER_ORDER 0 #elif defined(CONFIG_PPC_4K_PAGES) #define MPP_BUFFER_ORDER 3 #endif static void kvmppc_end_cede(struct kvm_vcpu *vcpu); static int kvmppc_hv_setup_htab_rma(struct kvm_vcpu *vcpu); static void kvmppc_fast_vcpu_kick_hv(struct kvm_vcpu *vcpu) { int me; int cpu = vcpu->cpu; wait_queue_head_t *wqp; wqp = kvm_arch_vcpu_wq(vcpu); if (waitqueue_active(wqp)) { wake_up_interruptible(wqp); ++vcpu->stat.halt_wakeup; } me = get_cpu(); /* CPU points to the first thread of the core */ if (cpu != me && cpu >= 0 && cpu < nr_cpu_ids) { #ifdef CONFIG_PPC_ICP_NATIVE int real_cpu = cpu + vcpu->arch.ptid; if (paca[real_cpu].kvm_hstate.xics_phys) xics_wake_cpu(real_cpu); else #endif if (cpu_online(cpu)) smp_send_reschedule(cpu); } put_cpu(); } /* * We use the vcpu_load/put functions to measure stolen time. * Stolen time is counted as time when either the vcpu is able to * run as part of a virtual core, but the task running the vcore * is preempted or sleeping, or when the vcpu needs something done * in the kernel by the task running the vcpu, but that task is * preempted or sleeping. Those two things have to be counted * separately, since one of the vcpu tasks will take on the job * of running the core, and the other vcpu tasks in the vcore will * sleep waiting for it to do that, but that sleep shouldn't count * as stolen time. * * Hence we accumulate stolen time when the vcpu can run as part of * a vcore using vc->stolen_tb, and the stolen time when the vcpu * needs its task to do other things in the kernel (for example, * service a page fault) in busy_stolen. We don't accumulate * stolen time for a vcore when it is inactive, or for a vcpu * when it is in state RUNNING or NOTREADY. NOTREADY is a bit of * a misnomer; it means that the vcpu task is not executing in * the KVM_VCPU_RUN ioctl, i.e. it is in userspace or elsewhere in * the kernel. We don't have any way of dividing up that time * between time that the vcpu is genuinely stopped, time that * the task is actively working on behalf of the vcpu, and time * that the task is preempted, so we don't count any of it as * stolen. * * Updates to busy_stolen are protected by arch.tbacct_lock; * updates to vc->stolen_tb are protected by the vcore->stoltb_lock * lock. The stolen times are measured in units of timebase ticks. * (Note that the != TB_NIL checks below are purely defensive; * they should never fail.) */ static void kvmppc_core_vcpu_load_hv(struct kvm_vcpu *vcpu, int cpu) { struct kvmppc_vcore *vc = vcpu->arch.vcore; unsigned long flags; /* * We can test vc->runner without taking the vcore lock, * because only this task ever sets vc->runner to this * vcpu, and once it is set to this vcpu, only this task * ever sets it to NULL. */ if (vc->runner == vcpu && vc->vcore_state != VCORE_INACTIVE) { spin_lock_irqsave(&vc->stoltb_lock, flags); if (vc->preempt_tb != TB_NIL) { vc->stolen_tb += mftb() - vc->preempt_tb; vc->preempt_tb = TB_NIL; } spin_unlock_irqrestore(&vc->stoltb_lock, flags); } spin_lock_irqsave(&vcpu->arch.tbacct_lock, flags); if (vcpu->arch.state == KVMPPC_VCPU_BUSY_IN_HOST && vcpu->arch.busy_preempt != TB_NIL) { vcpu->arch.busy_stolen += mftb() - vcpu->arch.busy_preempt; vcpu->arch.busy_preempt = TB_NIL; } spin_unlock_irqrestore(&vcpu->arch.tbacct_lock, flags); } static void kvmppc_core_vcpu_put_hv(struct kvm_vcpu *vcpu) { struct kvmppc_vcore *vc = vcpu->arch.vcore; unsigned long flags; if (vc->runner == vcpu && vc->vcore_state != VCORE_INACTIVE) { spin_lock_irqsave(&vc->stoltb_lock, flags); vc->preempt_tb = mftb(); spin_unlock_irqrestore(&vc->stoltb_lock, flags); } spin_lock_irqsave(&vcpu->arch.tbacct_lock, flags); if (vcpu->arch.state == KVMPPC_VCPU_BUSY_IN_HOST) vcpu->arch.busy_preempt = mftb(); spin_unlock_irqrestore(&vcpu->arch.tbacct_lock, flags); } static void kvmppc_set_msr_hv(struct kvm_vcpu *vcpu, u64 msr) { vcpu->arch.shregs.msr = msr; kvmppc_end_cede(vcpu); } void kvmppc_set_pvr_hv(struct kvm_vcpu *vcpu, u32 pvr) { vcpu->arch.pvr = pvr; } int kvmppc_set_arch_compat(struct kvm_vcpu *vcpu, u32 arch_compat) { unsigned long pcr = 0; struct kvmppc_vcore *vc = vcpu->arch.vcore; if (arch_compat) { switch (arch_compat) { case PVR_ARCH_205: /* * If an arch bit is set in PCR, all the defined * higher-order arch bits also have to be set. */ pcr = PCR_ARCH_206 | PCR_ARCH_205; break; case PVR_ARCH_206: case PVR_ARCH_206p: pcr = PCR_ARCH_206; break; case PVR_ARCH_207: break; default: return -EINVAL; } if (!cpu_has_feature(CPU_FTR_ARCH_207S)) { /* POWER7 can't emulate POWER8 */ if (!(pcr & PCR_ARCH_206)) return -EINVAL; pcr &= ~PCR_ARCH_206; } } spin_lock(&vc->lock); vc->arch_compat = arch_compat; vc->pcr = pcr; spin_unlock(&vc->lock); return 0; } void kvmppc_dump_regs(struct kvm_vcpu *vcpu) { int r; pr_err("vcpu %p (%d):\n", vcpu, vcpu->vcpu_id); pr_err("pc = %.16lx msr = %.16llx trap = %x\n", vcpu->arch.pc, vcpu->arch.shregs.msr, vcpu->arch.trap); for (r = 0; r < 16; ++r) pr_err("r%2d = %.16lx r%d = %.16lx\n", r, kvmppc_get_gpr(vcpu, r), r+16, kvmppc_get_gpr(vcpu, r+16)); pr_err("ctr = %.16lx lr = %.16lx\n", vcpu->arch.ctr, vcpu->arch.lr); pr_err("srr0 = %.16llx srr1 = %.16llx\n", vcpu->arch.shregs.srr0, vcpu->arch.shregs.srr1); pr_err("sprg0 = %.16llx sprg1 = %.16llx\n", vcpu->arch.shregs.sprg0, vcpu->arch.shregs.sprg1); pr_err("sprg2 = %.16llx sprg3 = %.16llx\n", vcpu->arch.shregs.sprg2, vcpu->arch.shregs.sprg3); pr_err("cr = %.8x xer = %.16lx dsisr = %.8x\n", vcpu->arch.cr, vcpu->arch.xer, vcpu->arch.shregs.dsisr); pr_err("dar = %.16llx\n", vcpu->arch.shregs.dar); pr_err("fault dar = %.16lx dsisr = %.8x\n", vcpu->arch.fault_dar, vcpu->arch.fault_dsisr); pr_err("SLB (%d entries):\n", vcpu->arch.slb_max); for (r = 0; r < vcpu->arch.slb_max; ++r) pr_err(" ESID = %.16llx VSID = %.16llx\n", vcpu->arch.slb[r].orige, vcpu->arch.slb[r].origv); pr_err("lpcr = %.16lx sdr1 = %.16lx last_inst = %.8x\n", vcpu->arch.vcore->lpcr, vcpu->kvm->arch.sdr1, vcpu->arch.last_inst); } struct kvm_vcpu *kvmppc_find_vcpu(struct kvm *kvm, int id) { int r; struct kvm_vcpu *v, *ret = NULL; mutex_lock(&kvm->lock); kvm_for_each_vcpu(r, v, kvm) { if (v->vcpu_id == id) { ret = v; break; } } mutex_unlock(&kvm->lock); return ret; } static void init_vpa(struct kvm_vcpu *vcpu, struct lppaca *vpa) { vpa->__old_status |= LPPACA_OLD_SHARED_PROC; vpa->yield_count = cpu_to_be32(1); } static int set_vpa(struct kvm_vcpu *vcpu, struct kvmppc_vpa *v, unsigned long addr, unsigned long len) { /* check address is cacheline aligned */ if (addr & (L1_CACHE_BYTES - 1)) return -EINVAL; spin_lock(&vcpu->arch.vpa_update_lock); if (v->next_gpa != addr || v->len != len) { v->next_gpa = addr; v->len = addr ? len : 0; v->update_pending = 1; } spin_unlock(&vcpu->arch.vpa_update_lock); return 0; } /* Length for a per-processor buffer is passed in at offset 4 in the buffer */ struct reg_vpa { u32 dummy; union { __be16 hword; __be32 word; } length; }; static int vpa_is_registered(struct kvmppc_vpa *vpap) { if (vpap->update_pending) return vpap->next_gpa != 0; return vpap->pinned_addr != NULL; } static unsigned long do_h_register_vpa(struct kvm_vcpu *vcpu, unsigned long flags, unsigned long vcpuid, unsigned long vpa) { struct kvm *kvm = vcpu->kvm; unsigned long len, nb; void *va; struct kvm_vcpu *tvcpu; int err; int subfunc; struct kvmppc_vpa *vpap; tvcpu = kvmppc_find_vcpu(kvm, vcpuid); if (!tvcpu) return H_PARAMETER; subfunc = (flags >> H_VPA_FUNC_SHIFT) & H_VPA_FUNC_MASK; if (subfunc == H_VPA_REG_VPA || subfunc == H_VPA_REG_DTL || subfunc == H_VPA_REG_SLB) { /* Registering new area - address must be cache-line aligned */ if ((vpa & (L1_CACHE_BYTES - 1)) || !vpa) return H_PARAMETER; /* convert logical addr to kernel addr and read length */ va = kvmppc_pin_guest_page(kvm, vpa, &nb); if (va == NULL) return H_PARAMETER; if (subfunc == H_VPA_REG_VPA) len = be16_to_cpu(((struct reg_vpa *)va)->length.hword); else len = be32_to_cpu(((struct reg_vpa *)va)->length.word); kvmppc_unpin_guest_page(kvm, va, vpa, false); /* Check length */ if (len > nb || len < sizeof(struct reg_vpa)) return H_PARAMETER; } else { vpa = 0; len = 0; } err = H_PARAMETER; vpap = NULL; spin_lock(&tvcpu->arch.vpa_update_lock); switch (subfunc) { case H_VPA_REG_VPA: /* register VPA */ if (len < sizeof(struct lppaca)) break; vpap = &tvcpu->arch.vpa; err = 0; break; case H_VPA_REG_DTL: /* register DTL */ if (len < sizeof(struct dtl_entry)) break; len -= len % sizeof(struct dtl_entry); /* Check that they have previously registered a VPA */ err = H_RESOURCE; if (!vpa_is_registered(&tvcpu->arch.vpa)) break; vpap = &tvcpu->arch.dtl; err = 0; break; case H_VPA_REG_SLB: /* register SLB shadow buffer */ /* Check that they have previously registered a VPA */ err = H_RESOURCE; if (!vpa_is_registered(&tvcpu->arch.vpa)) break; vpap = &tvcpu->arch.slb_shadow; err = 0; break; case H_VPA_DEREG_VPA: /* deregister VPA */ /* Check they don't still have a DTL or SLB buf registered */ err = H_RESOURCE; if (vpa_is_registered(&tvcpu->arch.dtl) || vpa_is_registered(&tvcpu->arch.slb_shadow)) break; vpap = &tvcpu->arch.vpa; err = 0; break; case H_VPA_DEREG_DTL: /* deregister DTL */ vpap = &tvcpu->arch.dtl; err = 0; break; case H_VPA_DEREG_SLB: /* deregister SLB shadow buffer */ vpap = &tvcpu->arch.slb_shadow; err = 0; break; } if (vpap) { vpap->next_gpa = vpa; vpap->len = len; vpap->update_pending = 1; } spin_unlock(&tvcpu->arch.vpa_update_lock); return err; } static void kvmppc_update_vpa(struct kvm_vcpu *vcpu, struct kvmppc_vpa *vpap) { struct kvm *kvm = vcpu->kvm; void *va; unsigned long nb; unsigned long gpa; /* * We need to pin the page pointed to by vpap->next_gpa, * but we can't call kvmppc_pin_guest_page under the lock * as it does get_user_pages() and down_read(). So we * have to drop the lock, pin the page, then get the lock * again and check that a new area didn't get registered * in the meantime. */ for (;;) { gpa = vpap->next_gpa; spin_unlock(&vcpu->arch.vpa_update_lock); va = NULL; nb = 0; if (gpa) va = kvmppc_pin_guest_page(kvm, gpa, &nb); spin_lock(&vcpu->arch.vpa_update_lock); if (gpa == vpap->next_gpa) break; /* sigh... unpin that one and try again */ if (va) kvmppc_unpin_guest_page(kvm, va, gpa, false); } vpap->update_pending = 0; if (va && nb < vpap->len) { /* * If it's now too short, it must be that userspace * has changed the mappings underlying guest memory, * so unregister the region. */ kvmppc_unpin_guest_page(kvm, va, gpa, false); va = NULL; } if (vpap->pinned_addr) kvmppc_unpin_guest_page(kvm, vpap->pinned_addr, vpap->gpa, vpap->dirty); vpap->gpa = gpa; vpap->pinned_addr = va; vpap->dirty = false; if (va) vpap->pinned_end = va + vpap->len; } static void kvmppc_update_vpas(struct kvm_vcpu *vcpu) { if (!(vcpu->arch.vpa.update_pending || vcpu->arch.slb_shadow.update_pending || vcpu->arch.dtl.update_pending)) return; spin_lock(&vcpu->arch.vpa_update_lock); if (vcpu->arch.vpa.update_pending) { kvmppc_update_vpa(vcpu, &vcpu->arch.vpa); if (vcpu->arch.vpa.pinned_addr) init_vpa(vcpu, vcpu->arch.vpa.pinned_addr); } if (vcpu->arch.dtl.update_pending) { kvmppc_update_vpa(vcpu, &vcpu->arch.dtl); vcpu->arch.dtl_ptr = vcpu->arch.dtl.pinned_addr; vcpu->arch.dtl_index = 0; } if (vcpu->arch.slb_shadow.update_pending) kvmppc_update_vpa(vcpu, &vcpu->arch.slb_shadow); spin_unlock(&vcpu->arch.vpa_update_lock); } /* * Return the accumulated stolen time for the vcore up until `now'. * The caller should hold the vcore lock. */ static u64 vcore_stolen_time(struct kvmppc_vcore *vc, u64 now) { u64 p; unsigned long flags; spin_lock_irqsave(&vc->stoltb_lock, flags); p = vc->stolen_tb; if (vc->vcore_state != VCORE_INACTIVE && vc->preempt_tb != TB_NIL) p += now - vc->preempt_tb; spin_unlock_irqrestore(&vc->stoltb_lock, flags); return p; } static void kvmppc_create_dtl_entry(struct kvm_vcpu *vcpu, struct kvmppc_vcore *vc) { struct dtl_entry *dt; struct lppaca *vpa; unsigned long stolen; unsigned long core_stolen; u64 now; dt = vcpu->arch.dtl_ptr; vpa = vcpu->arch.vpa.pinned_addr; now = mftb(); core_stolen = vcore_stolen_time(vc, now); stolen = core_stolen - vcpu->arch.stolen_logged; vcpu->arch.stolen_logged = core_stolen; spin_lock_irq(&vcpu->arch.tbacct_lock); stolen += vcpu->arch.busy_stolen; vcpu->arch.busy_stolen = 0; spin_unlock_irq(&vcpu->arch.tbacct_lock); if (!dt || !vpa) return; memset(dt, 0, sizeof(struct dtl_entry)); dt->dispatch_reason = 7; dt->processor_id = cpu_to_be16(vc->pcpu + vcpu->arch.ptid); dt->timebase = cpu_to_be64(now + vc->tb_offset); dt->enqueue_to_dispatch_time = cpu_to_be32(stolen); dt->srr0 = cpu_to_be64(kvmppc_get_pc(vcpu)); dt->srr1 = cpu_to_be64(vcpu->arch.shregs.msr); ++dt; if (dt == vcpu->arch.dtl.pinned_end) dt = vcpu->arch.dtl.pinned_addr; vcpu->arch.dtl_ptr = dt; /* order writing *dt vs. writing vpa->dtl_idx */ smp_wmb(); vpa->dtl_idx = cpu_to_be64(++vcpu->arch.dtl_index); vcpu->arch.dtl.dirty = true; } static bool kvmppc_power8_compatible(struct kvm_vcpu *vcpu) { if (vcpu->arch.vcore->arch_compat >= PVR_ARCH_207) return true; if ((!vcpu->arch.vcore->arch_compat) && cpu_has_feature(CPU_FTR_ARCH_207S)) return true; return false; } static int kvmppc_h_set_mode(struct kvm_vcpu *vcpu, unsigned long mflags, unsigned long resource, unsigned long value1, unsigned long value2) { switch (resource) { case H_SET_MODE_RESOURCE_SET_CIABR: if (!kvmppc_power8_compatible(vcpu)) return H_P2; if (value2) return H_P4; if (mflags) return H_UNSUPPORTED_FLAG_START; /* Guests can't breakpoint the hypervisor */ if ((value1 & CIABR_PRIV) == CIABR_PRIV_HYPER) return H_P3; vcpu->arch.ciabr = value1; return H_SUCCESS; case H_SET_MODE_RESOURCE_SET_DAWR: if (!kvmppc_power8_compatible(vcpu)) return H_P2; if (mflags) return H_UNSUPPORTED_FLAG_START; if (value2 & DABRX_HYP) return H_P4; vcpu->arch.dawr = value1; vcpu->arch.dawrx = value2; return H_SUCCESS; default: return H_TOO_HARD; } } static int kvm_arch_vcpu_yield_to(struct kvm_vcpu *target) { struct kvmppc_vcore *vcore = target->arch.vcore; /* * We expect to have been called by the real mode handler * (kvmppc_rm_h_confer()) which would have directly returned * H_SUCCESS if the source vcore wasn't idle (e.g. if it may * have useful work to do and should not confer) so we don't * recheck that here. */ spin_lock(&vcore->lock); if (target->arch.state == KVMPPC_VCPU_RUNNABLE && vcore->vcore_state != VCORE_INACTIVE) target = vcore->runner; spin_unlock(&vcore->lock); return kvm_vcpu_yield_to(target); } static int kvmppc_get_yield_count(struct kvm_vcpu *vcpu) { int yield_count = 0; struct lppaca *lppaca; spin_lock(&vcpu->arch.vpa_update_lock); lppaca = (struct lppaca *)vcpu->arch.vpa.pinned_addr; if (lppaca) yield_count = be32_to_cpu(lppaca->yield_count); spin_unlock(&vcpu->arch.vpa_update_lock); return yield_count; } int kvmppc_pseries_do_hcall(struct kvm_vcpu *vcpu) { unsigned long req = kvmppc_get_gpr(vcpu, 3); unsigned long target, ret = H_SUCCESS; int yield_count; struct kvm_vcpu *tvcpu; int idx, rc; if (req <= MAX_HCALL_OPCODE && !test_bit(req/4, vcpu->kvm->arch.enabled_hcalls)) return RESUME_HOST; switch (req) { case H_CEDE: break; case H_PROD: target = kvmppc_get_gpr(vcpu, 4); tvcpu = kvmppc_find_vcpu(vcpu->kvm, target); if (!tvcpu) { ret = H_PARAMETER; break; } tvcpu->arch.prodded = 1; smp_mb(); if (vcpu->arch.ceded) { if (waitqueue_active(&vcpu->wq)) { wake_up_interruptible(&vcpu->wq); vcpu->stat.halt_wakeup++; } } break; case H_CONFER: target = kvmppc_get_gpr(vcpu, 4); if (target == -1) break; tvcpu = kvmppc_find_vcpu(vcpu->kvm, target); if (!tvcpu) { ret = H_PARAMETER; break; } yield_count = kvmppc_get_gpr(vcpu, 5); if (kvmppc_get_yield_count(tvcpu) != yield_count) break; kvm_arch_vcpu_yield_to(tvcpu); break; case H_REGISTER_VPA: ret = do_h_register_vpa(vcpu, kvmppc_get_gpr(vcpu, 4), kvmppc_get_gpr(vcpu, 5), kvmppc_get_gpr(vcpu, 6)); break; case H_RTAS: if (list_empty(&vcpu->kvm->arch.rtas_tokens)) return RESUME_HOST; idx = srcu_read_lock(&vcpu->kvm->srcu); rc = kvmppc_rtas_hcall(vcpu); srcu_read_unlock(&vcpu->kvm->srcu, idx); if (rc == -ENOENT) return RESUME_HOST; else if (rc == 0) break; /* Send the error out to userspace via KVM_RUN */ return rc; case H_LOGICAL_CI_LOAD: ret = kvmppc_h_logical_ci_load(vcpu); if (ret == H_TOO_HARD) return RESUME_HOST; break; case H_LOGICAL_CI_STORE: ret = kvmppc_h_logical_ci_store(vcpu); if (ret == H_TOO_HARD) return RESUME_HOST; break; case H_SET_MODE: ret = kvmppc_h_set_mode(vcpu, kvmppc_get_gpr(vcpu, 4), kvmppc_get_gpr(vcpu, 5), kvmppc_get_gpr(vcpu, 6), kvmppc_get_gpr(vcpu, 7)); if (ret == H_TOO_HARD) return RESUME_HOST; break; case H_XIRR: case H_CPPR: case H_EOI: case H_IPI: case H_IPOLL: case H_XIRR_X: if (kvmppc_xics_enabled(vcpu)) { ret = kvmppc_xics_hcall(vcpu, req); break; } /* fallthrough */ default: return RESUME_HOST; } kvmppc_set_gpr(vcpu, 3, ret); vcpu->arch.hcall_needed = 0; return RESUME_GUEST; } static int kvmppc_hcall_impl_hv(unsigned long cmd) { switch (cmd) { case H_CEDE: case H_PROD: case H_CONFER: case H_REGISTER_VPA: case H_SET_MODE: case H_LOGICAL_CI_LOAD: case H_LOGICAL_CI_STORE: #ifdef CONFIG_KVM_XICS case H_XIRR: case H_CPPR: case H_EOI: case H_IPI: case H_IPOLL: case H_XIRR_X: #endif return 1; } /* See if it's in the real-mode table */ return kvmppc_hcall_impl_hv_realmode(cmd); } static int kvmppc_emulate_debug_inst(struct kvm_run *run, struct kvm_vcpu *vcpu) { u32 last_inst; if (kvmppc_get_last_inst(vcpu, INST_GENERIC, &last_inst) != EMULATE_DONE) { /* * Fetch failed, so return to guest and * try executing it again. */ return RESUME_GUEST; } if (last_inst == KVMPPC_INST_SW_BREAKPOINT) { run->exit_reason = KVM_EXIT_DEBUG; run->debug.arch.address = kvmppc_get_pc(vcpu); return RESUME_HOST; } else { kvmppc_core_queue_program(vcpu, SRR1_PROGILL); return RESUME_GUEST; } } static int kvmppc_handle_exit_hv(struct kvm_run *run, struct kvm_vcpu *vcpu, struct task_struct *tsk) { int r = RESUME_HOST; vcpu->stat.sum_exits++; run->exit_reason = KVM_EXIT_UNKNOWN; run->ready_for_interrupt_injection = 1; switch (vcpu->arch.trap) { /* We're good on these - the host merely wanted to get our attention */ case BOOK3S_INTERRUPT_HV_DECREMENTER: vcpu->stat.dec_exits++; r = RESUME_GUEST; break; case BOOK3S_INTERRUPT_EXTERNAL: case BOOK3S_INTERRUPT_H_DOORBELL: vcpu->stat.ext_intr_exits++; r = RESUME_GUEST; break; /* HMI is hypervisor interrupt and host has handled it. Resume guest.*/ case BOOK3S_INTERRUPT_HMI: case BOOK3S_INTERRUPT_PERFMON: r = RESUME_GUEST; break; case BOOK3S_INTERRUPT_MACHINE_CHECK: /* * Deliver a machine check interrupt to the guest. * We have to do this, even if the host has handled the * machine check, because machine checks use SRR0/1 and * the interrupt might have trashed guest state in them. */ kvmppc_book3s_queue_irqprio(vcpu, BOOK3S_INTERRUPT_MACHINE_CHECK); r = RESUME_GUEST; break; case BOOK3S_INTERRUPT_PROGRAM: { ulong flags; /* * Normally program interrupts are delivered directly * to the guest by the hardware, but we can get here * as a result of a hypervisor emulation interrupt * (e40) getting turned into a 700 by BML RTAS. */ flags = vcpu->arch.shregs.msr & 0x1f0000ull; kvmppc_core_queue_program(vcpu, flags); r = RESUME_GUEST; break; } case BOOK3S_INTERRUPT_SYSCALL: { /* hcall - punt to userspace */ int i; /* hypercall with MSR_PR has already been handled in rmode, * and never reaches here. */ run->papr_hcall.nr = kvmppc_get_gpr(vcpu, 3); for (i = 0; i < 9; ++i) run->papr_hcall.args[i] = kvmppc_get_gpr(vcpu, 4 + i); run->exit_reason = KVM_EXIT_PAPR_HCALL; vcpu->arch.hcall_needed = 1; r = RESUME_HOST; break; } /* * We get these next two if the guest accesses a page which it thinks * it has mapped but which is not actually present, either because * it is for an emulated I/O device or because the corresonding * host page has been paged out. Any other HDSI/HISI interrupts * have been handled already. */ case BOOK3S_INTERRUPT_H_DATA_STORAGE: r = RESUME_PAGE_FAULT; break; case BOOK3S_INTERRUPT_H_INST_STORAGE: vcpu->arch.fault_dar = kvmppc_get_pc(vcpu); vcpu->arch.fault_dsisr = 0; r = RESUME_PAGE_FAULT; break; /* * This occurs if the guest executes an illegal instruction. * If the guest debug is disabled, generate a program interrupt * to the guest. If guest debug is enabled, we need to check * whether the instruction is a software breakpoint instruction. * Accordingly return to Guest or Host. */ case BOOK3S_INTERRUPT_H_EMUL_ASSIST: if (vcpu->arch.emul_inst != KVM_INST_FETCH_FAILED) vcpu->arch.last_inst = kvmppc_need_byteswap(vcpu) ? swab32(vcpu->arch.emul_inst) : vcpu->arch.emul_inst; if (vcpu->guest_debug & KVM_GUESTDBG_USE_SW_BP) { r = kvmppc_emulate_debug_inst(run, vcpu); } else { kvmppc_core_queue_program(vcpu, SRR1_PROGILL); r = RESUME_GUEST; } break; /* * This occurs if the guest (kernel or userspace), does something that * is prohibited by HFSCR. We just generate a program interrupt to * the guest. */ case BOOK3S_INTERRUPT_H_FAC_UNAVAIL: kvmppc_core_queue_program(vcpu, SRR1_PROGILL); r = RESUME_GUEST; break; default: kvmppc_dump_regs(vcpu); printk(KERN_EMERG "trap=0x%x | pc=0x%lx | msr=0x%llx\n", vcpu->arch.trap, kvmppc_get_pc(vcpu), vcpu->arch.shregs.msr); run->hw.hardware_exit_reason = vcpu->arch.trap; r = RESUME_HOST; break; } return r; } static int kvm_arch_vcpu_ioctl_get_sregs_hv(struct kvm_vcpu *vcpu, struct kvm_sregs *sregs) { int i; memset(sregs, 0, sizeof(struct kvm_sregs)); sregs->pvr = vcpu->arch.pvr; for (i = 0; i < vcpu->arch.slb_max; i++) { sregs->u.s.ppc64.slb[i].slbe = vcpu->arch.slb[i].orige; sregs->u.s.ppc64.slb[i].slbv = vcpu->arch.slb[i].origv; } return 0; } static int kvm_arch_vcpu_ioctl_set_sregs_hv(struct kvm_vcpu *vcpu, struct kvm_sregs *sregs) { int i, j; /* Only accept the same PVR as the host's, since we can't spoof it */ if (sregs->pvr != vcpu->arch.pvr) return -EINVAL; j = 0; for (i = 0; i < vcpu->arch.slb_nr; i++) { if (sregs->u.s.ppc64.slb[i].slbe & SLB_ESID_V) { vcpu->arch.slb[j].orige = sregs->u.s.ppc64.slb[i].slbe; vcpu->arch.slb[j].origv = sregs->u.s.ppc64.slb[i].slbv; ++j; } } vcpu->arch.slb_max = j; return 0; } static void kvmppc_set_lpcr(struct kvm_vcpu *vcpu, u64 new_lpcr, bool preserve_top32) { struct kvm *kvm = vcpu->kvm; struct kvmppc_vcore *vc = vcpu->arch.vcore; u64 mask; mutex_lock(&kvm->lock); spin_lock(&vc->lock); /* * If ILE (interrupt little-endian) has changed, update the * MSR_LE bit in the intr_msr for each vcpu in this vcore. */ if ((new_lpcr & LPCR_ILE) != (vc->lpcr & LPCR_ILE)) { struct kvm_vcpu *vcpu; int i; kvm_for_each_vcpu(i, vcpu, kvm) { if (vcpu->arch.vcore != vc) continue; if (new_lpcr & LPCR_ILE) vcpu->arch.intr_msr |= MSR_LE; else vcpu->arch.intr_msr &= ~MSR_LE; } } /* * Userspace can only modify DPFD (default prefetch depth), * ILE (interrupt little-endian) and TC (translation control). * On POWER8 userspace can also modify AIL (alt. interrupt loc.) */ mask = LPCR_DPFD | LPCR_ILE | LPCR_TC; if (cpu_has_feature(CPU_FTR_ARCH_207S)) mask |= LPCR_AIL; /* Broken 32-bit version of LPCR must not clear top bits */ if (preserve_top32) mask &= 0xFFFFFFFF; vc->lpcr = (vc->lpcr & ~mask) | (new_lpcr & mask); spin_unlock(&vc->lock); mutex_unlock(&kvm->lock); } static int kvmppc_get_one_reg_hv(struct kvm_vcpu *vcpu, u64 id, union kvmppc_one_reg *val) { int r = 0; long int i; switch (id) { case KVM_REG_PPC_DEBUG_INST: *val = get_reg_val(id, KVMPPC_INST_SW_BREAKPOINT); break; case KVM_REG_PPC_HIOR: *val = get_reg_val(id, 0); break; case KVM_REG_PPC_DABR: *val = get_reg_val(id, vcpu->arch.dabr); break; case KVM_REG_PPC_DABRX: *val = get_reg_val(id, vcpu->arch.dabrx); break; case KVM_REG_PPC_DSCR: *val = get_reg_val(id, vcpu->arch.dscr); break; case KVM_REG_PPC_PURR: *val = get_reg_val(id, vcpu->arch.purr); break; case KVM_REG_PPC_SPURR: *val = get_reg_val(id, vcpu->arch.spurr); break; case KVM_REG_PPC_AMR: *val = get_reg_val(id, vcpu->arch.amr); break; case KVM_REG_PPC_UAMOR: *val = get_reg_val(id, vcpu->arch.uamor); break; case KVM_REG_PPC_MMCR0 ... KVM_REG_PPC_MMCRS: i = id - KVM_REG_PPC_MMCR0; *val = get_reg_val(id, vcpu->arch.mmcr[i]); break; case KVM_REG_PPC_PMC1 ... KVM_REG_PPC_PMC8: i = id - KVM_REG_PPC_PMC1; *val = get_reg_val(id, vcpu->arch.pmc[i]); break; case KVM_REG_PPC_SPMC1 ... KVM_REG_PPC_SPMC2: i = id - KVM_REG_PPC_SPMC1; *val = get_reg_val(id, vcpu->arch.spmc[i]); break; case KVM_REG_PPC_SIAR: *val = get_reg_val(id, vcpu->arch.siar); break; case KVM_REG_PPC_SDAR: *val = get_reg_val(id, vcpu->arch.sdar); break; case KVM_REG_PPC_SIER: *val = get_reg_val(id, vcpu->arch.sier); break; case KVM_REG_PPC_IAMR: *val = get_reg_val(id, vcpu->arch.iamr); break; case KVM_REG_PPC_PSPB: *val = get_reg_val(id, vcpu->arch.pspb); break; case KVM_REG_PPC_DPDES: *val = get_reg_val(id, vcpu->arch.vcore->dpdes); break; case KVM_REG_PPC_DAWR: *val = get_reg_val(id, vcpu->arch.dawr); break; case KVM_REG_PPC_DAWRX: *val = get_reg_val(id, vcpu->arch.dawrx); break; case KVM_REG_PPC_CIABR: *val = get_reg_val(id, vcpu->arch.ciabr); break; case KVM_REG_PPC_CSIGR: *val = get_reg_val(id, vcpu->arch.csigr); break; case KVM_REG_PPC_TACR: *val = get_reg_val(id, vcpu->arch.tacr); break; case KVM_REG_PPC_TCSCR: *val = get_reg_val(id, vcpu->arch.tcscr); break; case KVM_REG_PPC_PID: *val = get_reg_val(id, vcpu->arch.pid); break; case KVM_REG_PPC_ACOP: *val = get_reg_val(id, vcpu->arch.acop); break; case KVM_REG_PPC_WORT: *val = get_reg_val(id, vcpu->arch.wort); break; case KVM_REG_PPC_VPA_ADDR: spin_lock(&vcpu->arch.vpa_update_lock); *val = get_reg_val(id, vcpu->arch.vpa.next_gpa); spin_unlock(&vcpu->arch.vpa_update_lock); break; case KVM_REG_PPC_VPA_SLB: spin_lock(&vcpu->arch.vpa_update_lock); val->vpaval.addr = vcpu->arch.slb_shadow.next_gpa; val->vpaval.length = vcpu->arch.slb_shadow.len; spin_unlock(&vcpu->arch.vpa_update_lock); break; case KVM_REG_PPC_VPA_DTL: spin_lock(&vcpu->arch.vpa_update_lock); val->vpaval.addr = vcpu->arch.dtl.next_gpa; val->vpaval.length = vcpu->arch.dtl.len; spin_unlock(&vcpu->arch.vpa_update_lock); break; case KVM_REG_PPC_TB_OFFSET: *val = get_reg_val(id, vcpu->arch.vcore->tb_offset); break; case KVM_REG_PPC_LPCR: case KVM_REG_PPC_LPCR_64: *val = get_reg_val(id, vcpu->arch.vcore->lpcr); break; case KVM_REG_PPC_PPR: *val = get_reg_val(id, vcpu->arch.ppr); break; #ifdef CONFIG_PPC_TRANSACTIONAL_MEM case KVM_REG_PPC_TFHAR: *val = get_reg_val(id, vcpu->arch.tfhar); break; case KVM_REG_PPC_TFIAR: *val = get_reg_val(id, vcpu->arch.tfiar); break; case KVM_REG_PPC_TEXASR: *val = get_reg_val(id, vcpu->arch.texasr); break; case KVM_REG_PPC_TM_GPR0 ... KVM_REG_PPC_TM_GPR31: i = id - KVM_REG_PPC_TM_GPR0; *val = get_reg_val(id, vcpu->arch.gpr_tm[i]); break; case KVM_REG_PPC_TM_VSR0 ... KVM_REG_PPC_TM_VSR63: { int j; i = id - KVM_REG_PPC_TM_VSR0; if (i < 32) for (j = 0; j < TS_FPRWIDTH; j++) val->vsxval[j] = vcpu->arch.fp_tm.fpr[i][j]; else { if (cpu_has_feature(CPU_FTR_ALTIVEC)) val->vval = vcpu->arch.vr_tm.vr[i-32]; else r = -ENXIO; } break; } case KVM_REG_PPC_TM_CR: *val = get_reg_val(id, vcpu->arch.cr_tm); break; case KVM_REG_PPC_TM_LR: *val = get_reg_val(id, vcpu->arch.lr_tm); break; case KVM_REG_PPC_TM_CTR: *val = get_reg_val(id, vcpu->arch.ctr_tm); break; case KVM_REG_PPC_TM_FPSCR: *val = get_reg_val(id, vcpu->arch.fp_tm.fpscr); break; case KVM_REG_PPC_TM_AMR: *val = get_reg_val(id, vcpu->arch.amr_tm); break; case KVM_REG_PPC_TM_PPR: *val = get_reg_val(id, vcpu->arch.ppr_tm); break; case KVM_REG_PPC_TM_VRSAVE: *val = get_reg_val(id, vcpu->arch.vrsave_tm); break; case KVM_REG_PPC_TM_VSCR: if (cpu_has_feature(CPU_FTR_ALTIVEC)) *val = get_reg_val(id, vcpu->arch.vr_tm.vscr.u[3]); else r = -ENXIO; break; case KVM_REG_PPC_TM_DSCR: *val = get_reg_val(id, vcpu->arch.dscr_tm); break; case KVM_REG_PPC_TM_TAR: *val = get_reg_val(id, vcpu->arch.tar_tm); break; #endif case KVM_REG_PPC_ARCH_COMPAT: *val = get_reg_val(id, vcpu->arch.vcore->arch_compat); break; default: r = -EINVAL; break; } return r; } static int kvmppc_set_one_reg_hv(struct kvm_vcpu *vcpu, u64 id, union kvmppc_one_reg *val) { int r = 0; long int i; unsigned long addr, len; switch (id) { case KVM_REG_PPC_HIOR: /* Only allow this to be set to zero */ if (set_reg_val(id, *val)) r = -EINVAL; break; case KVM_REG_PPC_DABR: vcpu->arch.dabr = set_reg_val(id, *val); break; case KVM_REG_PPC_DABRX: vcpu->arch.dabrx = set_reg_val(id, *val) & ~DABRX_HYP; break; case KVM_REG_PPC_DSCR: vcpu->arch.dscr = set_reg_val(id, *val); break; case KVM_REG_PPC_PURR: vcpu->arch.purr = set_reg_val(id, *val); break; case KVM_REG_PPC_SPURR: vcpu->arch.spurr = set_reg_val(id, *val); break; case KVM_REG_PPC_AMR: vcpu->arch.amr = set_reg_val(id, *val); break; case KVM_REG_PPC_UAMOR: vcpu->arch.uamor = set_reg_val(id, *val); break; case KVM_REG_PPC_MMCR0 ... KVM_REG_PPC_MMCRS: i = id - KVM_REG_PPC_MMCR0; vcpu->arch.mmcr[i] = set_reg_val(id, *val); break; case KVM_REG_PPC_PMC1 ... KVM_REG_PPC_PMC8: i = id - KVM_REG_PPC_PMC1; vcpu->arch.pmc[i] = set_reg_val(id, *val); break; case KVM_REG_PPC_SPMC1 ... KVM_REG_PPC_SPMC2: i = id - KVM_REG_PPC_SPMC1; vcpu->arch.spmc[i] = set_reg_val(id, *val); break; case KVM_REG_PPC_SIAR: vcpu->arch.siar = set_reg_val(id, *val); break; case KVM_REG_PPC_SDAR: vcpu->arch.sdar = set_reg_val(id, *val); break; case KVM_REG_PPC_SIER: vcpu->arch.sier = set_reg_val(id, *val); break; case KVM_REG_PPC_IAMR: vcpu->arch.iamr = set_reg_val(id, *val); break; case KVM_REG_PPC_PSPB: vcpu->arch.pspb = set_reg_val(id, *val); break; case KVM_REG_PPC_DPDES: vcpu->arch.vcore->dpdes = set_reg_val(id, *val); break; case KVM_REG_PPC_DAWR: vcpu->arch.dawr = set_reg_val(id, *val); break; case KVM_REG_PPC_DAWRX: vcpu->arch.dawrx = set_reg_val(id, *val) & ~DAWRX_HYP; break; case KVM_REG_PPC_CIABR: vcpu->arch.ciabr = set_reg_val(id, *val); /* Don't allow setting breakpoints in hypervisor code */ if ((vcpu->arch.ciabr & CIABR_PRIV) == CIABR_PRIV_HYPER) vcpu->arch.ciabr &= ~CIABR_PRIV; /* disable */ break; case KVM_REG_PPC_CSIGR: vcpu->arch.csigr = set_reg_val(id, *val); break; case KVM_REG_PPC_TACR: vcpu->arch.tacr = set_reg_val(id, *val); break; case KVM_REG_PPC_TCSCR: vcpu->arch.tcscr = set_reg_val(id, *val); break; case KVM_REG_PPC_PID: vcpu->arch.pid = set_reg_val(id, *val); break; case KVM_REG_PPC_ACOP: vcpu->arch.acop = set_reg_val(id, *val); break; case KVM_REG_PPC_WORT: vcpu->arch.wort = set_reg_val(id, *val); break; case KVM_REG_PPC_VPA_ADDR: addr = set_reg_val(id, *val); r = -EINVAL; if (!addr && (vcpu->arch.slb_shadow.next_gpa || vcpu->arch.dtl.next_gpa)) break; r = set_vpa(vcpu, &vcpu->arch.vpa, addr, sizeof(struct lppaca)); break; case KVM_REG_PPC_VPA_SLB: addr = val->vpaval.addr; len = val->vpaval.length; r = -EINVAL; if (addr && !vcpu->arch.vpa.next_gpa) break; r = set_vpa(vcpu, &vcpu->arch.slb_shadow, addr, len); break; case KVM_REG_PPC_VPA_DTL: addr = val->vpaval.addr; len = val->vpaval.length; r = -EINVAL; if (addr && (len < sizeof(struct dtl_entry) || !vcpu->arch.vpa.next_gpa)) break; len -= len % sizeof(struct dtl_entry); r = set_vpa(vcpu, &vcpu->arch.dtl, addr, len); break; case KVM_REG_PPC_TB_OFFSET: /* round up to multiple of 2^24 */ vcpu->arch.vcore->tb_offset = ALIGN(set_reg_val(id, *val), 1UL << 24); break; case KVM_REG_PPC_LPCR: kvmppc_set_lpcr(vcpu, set_reg_val(id, *val), true); break; case KVM_REG_PPC_LPCR_64: kvmppc_set_lpcr(vcpu, set_reg_val(id, *val), false); break; case KVM_REG_PPC_PPR: vcpu->arch.ppr = set_reg_val(id, *val); break; #ifdef CONFIG_PPC_TRANSACTIONAL_MEM case KVM_REG_PPC_TFHAR: vcpu->arch.tfhar = set_reg_val(id, *val); break; case KVM_REG_PPC_TFIAR: vcpu->arch.tfiar = set_reg_val(id, *val); break; case KVM_REG_PPC_TEXASR: vcpu->arch.texasr = set_reg_val(id, *val); break; case KVM_REG_PPC_TM_GPR0 ... KVM_REG_PPC_TM_GPR31: i = id - KVM_REG_PPC_TM_GPR0; vcpu->arch.gpr_tm[i] = set_reg_val(id, *val); break; case KVM_REG_PPC_TM_VSR0 ... KVM_REG_PPC_TM_VSR63: { int j; i = id - KVM_REG_PPC_TM_VSR0; if (i < 32) for (j = 0; j < TS_FPRWIDTH; j++) vcpu->arch.fp_tm.fpr[i][j] = val->vsxval[j]; else if (cpu_has_feature(CPU_FTR_ALTIVEC)) vcpu->arch.vr_tm.vr[i-32] = val->vval; else r = -ENXIO; break; } case KVM_REG_PPC_TM_CR: vcpu->arch.cr_tm = set_reg_val(id, *val); break; case KVM_REG_PPC_TM_LR: vcpu->arch.lr_tm = set_reg_val(id, *val); break; case KVM_REG_PPC_TM_CTR: vcpu->arch.ctr_tm = set_reg_val(id, *val); break; case KVM_REG_PPC_TM_FPSCR: vcpu->arch.fp_tm.fpscr = set_reg_val(id, *val); break; case KVM_REG_PPC_TM_AMR: vcpu->arch.amr_tm = set_reg_val(id, *val); break; case KVM_REG_PPC_TM_PPR: vcpu->arch.ppr_tm = set_reg_val(id, *val); break; case KVM_REG_PPC_TM_VRSAVE: vcpu->arch.vrsave_tm = set_reg_val(id, *val); break; case KVM_REG_PPC_TM_VSCR: if (cpu_has_feature(CPU_FTR_ALTIVEC)) vcpu->arch.vr.vscr.u[3] = set_reg_val(id, *val); else r = - ENXIO; break; case KVM_REG_PPC_TM_DSCR: vcpu->arch.dscr_tm = set_reg_val(id, *val); break; case KVM_REG_PPC_TM_TAR: vcpu->arch.tar_tm = set_reg_val(id, *val); break; #endif case KVM_REG_PPC_ARCH_COMPAT: r = kvmppc_set_arch_compat(vcpu, set_reg_val(id, *val)); break; default: r = -EINVAL; break; } return r; } static struct kvmppc_vcore *kvmppc_vcore_create(struct kvm *kvm, int core) { struct kvmppc_vcore *vcore; vcore = kzalloc(sizeof(struct kvmppc_vcore), GFP_KERNEL); if (vcore == NULL) return NULL; INIT_LIST_HEAD(&vcore->runnable_threads); spin_lock_init(&vcore->lock); spin_lock_init(&vcore->stoltb_lock); init_waitqueue_head(&vcore->wq); vcore->preempt_tb = TB_NIL; vcore->lpcr = kvm->arch.lpcr; vcore->first_vcpuid = core * threads_per_subcore; vcore->kvm = kvm; vcore->mpp_buffer_is_valid = false; if (cpu_has_feature(CPU_FTR_ARCH_207S)) vcore->mpp_buffer = (void *)__get_free_pages( GFP_KERNEL|__GFP_ZERO, MPP_BUFFER_ORDER); return vcore; } static struct kvm_vcpu *kvmppc_core_vcpu_create_hv(struct kvm *kvm, unsigned int id) { struct kvm_vcpu *vcpu; int err = -EINVAL; int core; struct kvmppc_vcore *vcore; core = id / threads_per_subcore; if (core >= KVM_MAX_VCORES) goto out; err = -ENOMEM; vcpu = kmem_cache_zalloc(kvm_vcpu_cache, GFP_KERNEL); if (!vcpu) goto out; err = kvm_vcpu_init(vcpu, kvm, id); if (err) goto free_vcpu; vcpu->arch.shared = &vcpu->arch.shregs; #ifdef CONFIG_KVM_BOOK3S_PR_POSSIBLE /* * The shared struct is never shared on HV, * so we can always use host endianness */ #ifdef __BIG_ENDIAN__ vcpu->arch.shared_big_endian = true; #else vcpu->arch.shared_big_endian = false; #endif #endif vcpu->arch.mmcr[0] = MMCR0_FC; vcpu->arch.ctrl = CTRL_RUNLATCH; /* default to host PVR, since we can't spoof it */ kvmppc_set_pvr_hv(vcpu, mfspr(SPRN_PVR)); spin_lock_init(&vcpu->arch.vpa_update_lock); spin_lock_init(&vcpu->arch.tbacct_lock); vcpu->arch.busy_preempt = TB_NIL; vcpu->arch.intr_msr = MSR_SF | MSR_ME; kvmppc_mmu_book3s_hv_init(vcpu); vcpu->arch.state = KVMPPC_VCPU_NOTREADY; init_waitqueue_head(&vcpu->arch.cpu_run); mutex_lock(&kvm->lock); vcore = kvm->arch.vcores[core]; if (!vcore) { vcore = kvmppc_vcore_create(kvm, core); kvm->arch.vcores[core] = vcore; kvm->arch.online_vcores++; } mutex_unlock(&kvm->lock); if (!vcore) goto free_vcpu; spin_lock(&vcore->lock); ++vcore->num_threads; spin_unlock(&vcore->lock); vcpu->arch.vcore = vcore; vcpu->arch.ptid = vcpu->vcpu_id - vcore->first_vcpuid; vcpu->arch.cpu_type = KVM_CPU_3S_64; kvmppc_sanity_check(vcpu); return vcpu; free_vcpu: kmem_cache_free(kvm_vcpu_cache, vcpu); out: return ERR_PTR(err); } static void unpin_vpa(struct kvm *kvm, struct kvmppc_vpa *vpa) { if (vpa->pinned_addr) kvmppc_unpin_guest_page(kvm, vpa->pinned_addr, vpa->gpa, vpa->dirty); } static void kvmppc_core_vcpu_free_hv(struct kvm_vcpu *vcpu) { spin_lock(&vcpu->arch.vpa_update_lock); unpin_vpa(vcpu->kvm, &vcpu->arch.dtl); unpin_vpa(vcpu->kvm, &vcpu->arch.slb_shadow); unpin_vpa(vcpu->kvm, &vcpu->arch.vpa); spin_unlock(&vcpu->arch.vpa_update_lock); kvm_vcpu_uninit(vcpu); kmem_cache_free(kvm_vcpu_cache, vcpu); } static int kvmppc_core_check_requests_hv(struct kvm_vcpu *vcpu) { /* Indicate we want to get back into the guest */ return 1; } static void kvmppc_set_timer(struct kvm_vcpu *vcpu) { unsigned long dec_nsec, now; now = get_tb(); if (now > vcpu->arch.dec_expires) { /* decrementer has already gone negative */ kvmppc_core_queue_dec(vcpu); kvmppc_core_prepare_to_enter(vcpu); return; } dec_nsec = (vcpu->arch.dec_expires - now) * NSEC_PER_SEC / tb_ticks_per_sec; hrtimer_start(&vcpu->arch.dec_timer, ktime_set(0, dec_nsec), HRTIMER_MODE_REL); vcpu->arch.timer_running = 1; } static void kvmppc_end_cede(struct kvm_vcpu *vcpu) { vcpu->arch.ceded = 0; if (vcpu->arch.timer_running) { hrtimer_try_to_cancel(&vcpu->arch.dec_timer); vcpu->arch.timer_running = 0; } } extern void __kvmppc_vcore_entry(void); static void kvmppc_remove_runnable(struct kvmppc_vcore *vc, struct kvm_vcpu *vcpu) { u64 now; if (vcpu->arch.state != KVMPPC_VCPU_RUNNABLE) return; spin_lock_irq(&vcpu->arch.tbacct_lock); now = mftb(); vcpu->arch.busy_stolen += vcore_stolen_time(vc, now) - vcpu->arch.stolen_logged; vcpu->arch.busy_preempt = now; vcpu->arch.state = KVMPPC_VCPU_BUSY_IN_HOST; spin_unlock_irq(&vcpu->arch.tbacct_lock); --vc->n_runnable; list_del(&vcpu->arch.run_list); } static int kvmppc_grab_hwthread(int cpu) { struct paca_struct *tpaca; long timeout = 10000; tpaca = &paca[cpu]; /* Ensure the thread won't go into the kernel if it wakes */ tpaca->kvm_hstate.hwthread_req = 1; tpaca->kvm_hstate.kvm_vcpu = NULL; /* * If the thread is already executing in the kernel (e.g. handling * a stray interrupt), wait for it to get back to nap mode. * The smp_mb() is to ensure that our setting of hwthread_req * is visible before we look at hwthread_state, so if this * races with the code at system_reset_pSeries and the thread * misses our setting of hwthread_req, we are sure to see its * setting of hwthread_state, and vice versa. */ smp_mb(); while (tpaca->kvm_hstate.hwthread_state == KVM_HWTHREAD_IN_KERNEL) { if (--timeout <= 0) { pr_err("KVM: couldn't grab cpu %d\n", cpu); return -EBUSY; } udelay(1); } return 0; } static void kvmppc_release_hwthread(int cpu) { struct paca_struct *tpaca; tpaca = &paca[cpu]; tpaca->kvm_hstate.hwthread_req = 0; tpaca->kvm_hstate.kvm_vcpu = NULL; } static void kvmppc_start_thread(struct kvm_vcpu *vcpu) { int cpu; struct paca_struct *tpaca; struct kvmppc_vcore *vc = vcpu->arch.vcore; if (vcpu->arch.timer_running) { hrtimer_try_to_cancel(&vcpu->arch.dec_timer); vcpu->arch.timer_running = 0; } cpu = vc->pcpu + vcpu->arch.ptid; tpaca = &paca[cpu]; tpaca->kvm_hstate.kvm_vcpu = vcpu; tpaca->kvm_hstate.kvm_vcore = vc; tpaca->kvm_hstate.ptid = vcpu->arch.ptid; vcpu->cpu = vc->pcpu; smp_wmb(); #if defined(CONFIG_PPC_ICP_NATIVE) && defined(CONFIG_SMP) if (cpu != smp_processor_id()) { xics_wake_cpu(cpu); if (vcpu->arch.ptid) ++vc->n_woken; } #endif } static void kvmppc_wait_for_nap(struct kvmppc_vcore *vc) { int i; HMT_low(); i = 0; while (vc->nap_count < vc->n_woken) { if (++i >= 1000000) { pr_err("kvmppc_wait_for_nap timeout %d %d\n", vc->nap_count, vc->n_woken); break; } cpu_relax(); } HMT_medium(); } /* * Check that we are on thread 0 and that any other threads in * this core are off-line. Then grab the threads so they can't * enter the kernel. */ static int on_primary_thread(void) { int cpu = smp_processor_id(); int thr; /* Are we on a primary subcore? */ if (cpu_thread_in_subcore(cpu)) return 0; thr = 0; while (++thr < threads_per_subcore) if (cpu_online(cpu + thr)) return 0; /* Grab all hw threads so they can't go into the kernel */ for (thr = 1; thr < threads_per_subcore; ++thr) { if (kvmppc_grab_hwthread(cpu + thr)) { /* Couldn't grab one; let the others go */ do { kvmppc_release_hwthread(cpu + thr); } while (--thr > 0); return 0; } } return 1; } static void kvmppc_start_saving_l2_cache(struct kvmppc_vcore *vc) { phys_addr_t phy_addr, mpp_addr; phy_addr = (phys_addr_t)virt_to_phys(vc->mpp_buffer); mpp_addr = phy_addr & PPC_MPPE_ADDRESS_MASK; mtspr(SPRN_MPPR, mpp_addr | PPC_MPPR_FETCH_ABORT); logmpp(mpp_addr | PPC_LOGMPP_LOG_L2); vc->mpp_buffer_is_valid = true; } static void kvmppc_start_restoring_l2_cache(const struct kvmppc_vcore *vc) { phys_addr_t phy_addr, mpp_addr; phy_addr = virt_to_phys(vc->mpp_buffer); mpp_addr = phy_addr & PPC_MPPE_ADDRESS_MASK; /* We must abort any in-progress save operations to ensure * the table is valid so that prefetch engine knows when to * stop prefetching. */ logmpp(mpp_addr | PPC_LOGMPP_LOG_ABORT); mtspr(SPRN_MPPR, mpp_addr | PPC_MPPR_FETCH_WHOLE_TABLE); } /* * Run a set of guest threads on a physical core. * Called with vc->lock held. */ static void kvmppc_run_core(struct kvmppc_vcore *vc) { struct kvm_vcpu *vcpu, *vnext; long ret; u64 now; int i, need_vpa_update; int srcu_idx; struct kvm_vcpu *vcpus_to_update[threads_per_core]; /* don't start if any threads have a signal pending */ need_vpa_update = 0; list_for_each_entry(vcpu, &vc->runnable_threads, arch.run_list) { if (signal_pending(vcpu->arch.run_task)) return; if (vcpu->arch.vpa.update_pending || vcpu->arch.slb_shadow.update_pending || vcpu->arch.dtl.update_pending) vcpus_to_update[need_vpa_update++] = vcpu; } /* * Initialize *vc, in particular vc->vcore_state, so we can * drop the vcore lock if necessary. */ vc->n_woken = 0; vc->nap_count = 0; vc->entry_exit_count = 0; vc->preempt_tb = TB_NIL; vc->vcore_state = VCORE_STARTING; vc->in_guest = 0; vc->napping_threads = 0; vc->conferring_threads = 0; /* * Updating any of the vpas requires calling kvmppc_pin_guest_page, * which can't be called with any spinlocks held. */ if (need_vpa_update) { spin_unlock(&vc->lock); for (i = 0; i < need_vpa_update; ++i) kvmppc_update_vpas(vcpus_to_update[i]); spin_lock(&vc->lock); } /* * Make sure we are running on primary threads, and that secondary * threads are offline. Also check if the number of threads in this * guest are greater than the current system threads per guest. */ if ((threads_per_core > 1) && ((vc->num_threads > threads_per_subcore) || !on_primary_thread())) { list_for_each_entry(vcpu, &vc->runnable_threads, arch.run_list) vcpu->arch.ret = -EBUSY; goto out; } vc->pcpu = smp_processor_id(); list_for_each_entry(vcpu, &vc->runnable_threads, arch.run_list) { kvmppc_start_thread(vcpu); kvmppc_create_dtl_entry(vcpu, vc); trace_kvm_guest_enter(vcpu); } /* Set this explicitly in case thread 0 doesn't have a vcpu */ get_paca()->kvm_hstate.kvm_vcore = vc; get_paca()->kvm_hstate.ptid = 0; vc->vcore_state = VCORE_RUNNING; preempt_disable(); trace_kvmppc_run_core(vc, 0); spin_unlock(&vc->lock); kvm_guest_enter(); srcu_idx = srcu_read_lock(&vc->kvm->srcu); if (vc->mpp_buffer_is_valid) kvmppc_start_restoring_l2_cache(vc); __kvmppc_vcore_entry(); spin_lock(&vc->lock); if (vc->mpp_buffer) kvmppc_start_saving_l2_cache(vc); /* disable sending of IPIs on virtual external irqs */ list_for_each_entry(vcpu, &vc->runnable_threads, arch.run_list) vcpu->cpu = -1; /* wait for secondary threads to finish writing their state to memory */ if (vc->nap_count < vc->n_woken) kvmppc_wait_for_nap(vc); for (i = 0; i < threads_per_subcore; ++i) kvmppc_release_hwthread(vc->pcpu + i); /* prevent other vcpu threads from doing kvmppc_start_thread() now */ vc->vcore_state = VCORE_EXITING; spin_unlock(&vc->lock); srcu_read_unlock(&vc->kvm->srcu, srcu_idx); /* make sure updates to secondary vcpu structs are visible now */ smp_mb(); kvm_guest_exit(); preempt_enable(); cond_resched(); spin_lock(&vc->lock); now = get_tb(); list_for_each_entry(vcpu, &vc->runnable_threads, arch.run_list) { /* cancel pending dec exception if dec is positive */ if (now < vcpu->arch.dec_expires && kvmppc_core_pending_dec(vcpu)) kvmppc_core_dequeue_dec(vcpu); trace_kvm_guest_exit(vcpu); ret = RESUME_GUEST; if (vcpu->arch.trap) ret = kvmppc_handle_exit_hv(vcpu->arch.kvm_run, vcpu, vcpu->arch.run_task); vcpu->arch.ret = ret; vcpu->arch.trap = 0; if (vcpu->arch.ceded) { if (!is_kvmppc_resume_guest(ret)) kvmppc_end_cede(vcpu); else kvmppc_set_timer(vcpu); } } out: vc->vcore_state = VCORE_INACTIVE; list_for_each_entry_safe(vcpu, vnext, &vc->runnable_threads, arch.run_list) { if (!is_kvmppc_resume_guest(vcpu->arch.ret)) { kvmppc_remove_runnable(vc, vcpu); wake_up(&vcpu->arch.cpu_run); } } trace_kvmppc_run_core(vc, 1); } /* * Wait for some other vcpu thread to execute us, and * wake us up when we need to handle something in the host. */ static void kvmppc_wait_for_exec(struct kvm_vcpu *vcpu, int wait_state) { DEFINE_WAIT(wait); prepare_to_wait(&vcpu->arch.cpu_run, &wait, wait_state); if (vcpu->arch.state == KVMPPC_VCPU_RUNNABLE) schedule(); finish_wait(&vcpu->arch.cpu_run, &wait); } /* * All the vcpus in this vcore are idle, so wait for a decrementer * or external interrupt to one of the vcpus. vc->lock is held. */ static void kvmppc_vcore_blocked(struct kvmppc_vcore *vc) { struct kvm_vcpu *vcpu; int do_sleep = 1; DEFINE_WAIT(wait); prepare_to_wait(&vc->wq, &wait, TASK_INTERRUPTIBLE); /* * Check one last time for pending exceptions and ceded state after * we put ourselves on the wait queue */ list_for_each_entry(vcpu, &vc->runnable_threads, arch.run_list) { if (vcpu->arch.pending_exceptions || !vcpu->arch.ceded) { do_sleep = 0; break; } } if (!do_sleep) { finish_wait(&vc->wq, &wait); return; } vc->vcore_state = VCORE_SLEEPING; trace_kvmppc_vcore_blocked(vc, 0); spin_unlock(&vc->lock); schedule(); finish_wait(&vc->wq, &wait); spin_lock(&vc->lock); vc->vcore_state = VCORE_INACTIVE; trace_kvmppc_vcore_blocked(vc, 1); } static int kvmppc_run_vcpu(struct kvm_run *kvm_run, struct kvm_vcpu *vcpu) { int n_ceded; struct kvmppc_vcore *vc; struct kvm_vcpu *v, *vn; trace_kvmppc_run_vcpu_enter(vcpu); kvm_run->exit_reason = 0; vcpu->arch.ret = RESUME_GUEST; vcpu->arch.trap = 0; kvmppc_update_vpas(vcpu); /* * Synchronize with other threads in this virtual core */ vc = vcpu->arch.vcore; spin_lock(&vc->lock); vcpu->arch.ceded = 0; vcpu->arch.run_task = current; vcpu->arch.kvm_run = kvm_run; vcpu->arch.stolen_logged = vcore_stolen_time(vc, mftb()); vcpu->arch.state = KVMPPC_VCPU_RUNNABLE; vcpu->arch.busy_preempt = TB_NIL; list_add_tail(&vcpu->arch.run_list, &vc->runnable_threads); ++vc->n_runnable; /* * This happens the first time this is called for a vcpu. * If the vcore is already running, we may be able to start * this thread straight away and have it join in. */ if (!signal_pending(current)) { if (vc->vcore_state == VCORE_RUNNING && VCORE_EXIT_COUNT(vc) == 0) { kvmppc_create_dtl_entry(vcpu, vc); kvmppc_start_thread(vcpu); trace_kvm_guest_enter(vcpu); } else if (vc->vcore_state == VCORE_SLEEPING) { wake_up(&vc->wq); } } while (vcpu->arch.state == KVMPPC_VCPU_RUNNABLE && !signal_pending(current)) { if (vc->vcore_state != VCORE_INACTIVE) { spin_unlock(&vc->lock); kvmppc_wait_for_exec(vcpu, TASK_INTERRUPTIBLE); spin_lock(&vc->lock); continue; } list_for_each_entry_safe(v, vn, &vc->runnable_threads, arch.run_list) { kvmppc_core_prepare_to_enter(v); if (signal_pending(v->arch.run_task)) { kvmppc_remove_runnable(vc, v); v->stat.signal_exits++; v->arch.kvm_run->exit_reason = KVM_EXIT_INTR; v->arch.ret = -EINTR; wake_up(&v->arch.cpu_run); } } if (!vc->n_runnable || vcpu->arch.state != KVMPPC_VCPU_RUNNABLE) break; vc->runner = vcpu; n_ceded = 0; list_for_each_entry(v, &vc->runnable_threads, arch.run_list) { if (!v->arch.pending_exceptions) n_ceded += v->arch.ceded; else v->arch.ceded = 0; } if (n_ceded == vc->n_runnable) kvmppc_vcore_blocked(vc); else kvmppc_run_core(vc); vc->runner = NULL; } while (vcpu->arch.state == KVMPPC_VCPU_RUNNABLE && (vc->vcore_state == VCORE_RUNNING || vc->vcore_state == VCORE_EXITING)) { spin_unlock(&vc->lock); kvmppc_wait_for_exec(vcpu, TASK_UNINTERRUPTIBLE); spin_lock(&vc->lock); } if (vcpu->arch.state == KVMPPC_VCPU_RUNNABLE) { kvmppc_remove_runnable(vc, vcpu); vcpu->stat.signal_exits++; kvm_run->exit_reason = KVM_EXIT_INTR; vcpu->arch.ret = -EINTR; } if (vc->n_runnable && vc->vcore_state == VCORE_INACTIVE) { /* Wake up some vcpu to run the core */ v = list_first_entry(&vc->runnable_threads, struct kvm_vcpu, arch.run_list); wake_up(&v->arch.cpu_run); } trace_kvmppc_run_vcpu_exit(vcpu, kvm_run); spin_unlock(&vc->lock); return vcpu->arch.ret; } static int kvmppc_vcpu_run_hv(struct kvm_run *run, struct kvm_vcpu *vcpu) { int r; int srcu_idx; if (!vcpu->arch.sane) { run->exit_reason = KVM_EXIT_INTERNAL_ERROR; return -EINVAL; } kvmppc_core_prepare_to_enter(vcpu); /* No need to go into the guest when all we'll do is come back out */ if (signal_pending(current)) { run->exit_reason = KVM_EXIT_INTR; return -EINTR; } atomic_inc(&vcpu->kvm->arch.vcpus_running); /* Order vcpus_running vs. rma_setup_done, see kvmppc_alloc_reset_hpt */ smp_mb(); /* On the first time here, set up HTAB and VRMA */ if (!vcpu->kvm->arch.rma_setup_done) { r = kvmppc_hv_setup_htab_rma(vcpu); if (r) goto out; } flush_fp_to_thread(current); flush_altivec_to_thread(current); flush_vsx_to_thread(current); vcpu->arch.wqp = &vcpu->arch.vcore->wq; vcpu->arch.pgdir = current->mm->pgd; vcpu->arch.state = KVMPPC_VCPU_BUSY_IN_HOST; do { r = kvmppc_run_vcpu(run, vcpu); if (run->exit_reason == KVM_EXIT_PAPR_HCALL && !(vcpu->arch.shregs.msr & MSR_PR)) { trace_kvm_hcall_enter(vcpu); r = kvmppc_pseries_do_hcall(vcpu); trace_kvm_hcall_exit(vcpu, r); kvmppc_core_prepare_to_enter(vcpu); } else if (r == RESUME_PAGE_FAULT) { srcu_idx = srcu_read_lock(&vcpu->kvm->srcu); r = kvmppc_book3s_hv_page_fault(run, vcpu, vcpu->arch.fault_dar, vcpu->arch.fault_dsisr); srcu_read_unlock(&vcpu->kvm->srcu, srcu_idx); } } while (is_kvmppc_resume_guest(r)); out: vcpu->arch.state = KVMPPC_VCPU_NOTREADY; atomic_dec(&vcpu->kvm->arch.vcpus_running); return r; } static void kvmppc_add_seg_page_size(struct kvm_ppc_one_seg_page_size **sps, int linux_psize) { struct mmu_psize_def *def = &mmu_psize_defs[linux_psize]; if (!def->shift) return; (*sps)->page_shift = def->shift; (*sps)->slb_enc = def->sllp; (*sps)->enc[0].page_shift = def->shift; (*sps)->enc[0].pte_enc = def->penc[linux_psize]; /* * Add 16MB MPSS support if host supports it */ if (linux_psize != MMU_PAGE_16M && def->penc[MMU_PAGE_16M] != -1) { (*sps)->enc[1].page_shift = 24; (*sps)->enc[1].pte_enc = def->penc[MMU_PAGE_16M]; } (*sps)++; } static int kvm_vm_ioctl_get_smmu_info_hv(struct kvm *kvm, struct kvm_ppc_smmu_info *info) { struct kvm_ppc_one_seg_page_size *sps; info->flags = KVM_PPC_PAGE_SIZES_REAL; if (mmu_has_feature(MMU_FTR_1T_SEGMENT)) info->flags |= KVM_PPC_1T_SEGMENTS; info->slb_size = mmu_slb_size; /* We only support these sizes for now, and no muti-size segments */ sps = &info->sps[0]; kvmppc_add_seg_page_size(&sps, MMU_PAGE_4K); kvmppc_add_seg_page_size(&sps, MMU_PAGE_64K); kvmppc_add_seg_page_size(&sps, MMU_PAGE_16M); return 0; } /* * Get (and clear) the dirty memory log for a memory slot. */ static int kvm_vm_ioctl_get_dirty_log_hv(struct kvm *kvm, struct kvm_dirty_log *log) { struct kvm_memory_slot *memslot; int r; unsigned long n; mutex_lock(&kvm->slots_lock); r = -EINVAL; if (log->slot >= KVM_USER_MEM_SLOTS) goto out; memslot = id_to_memslot(kvm->memslots, log->slot); r = -ENOENT; if (!memslot->dirty_bitmap) goto out; n = kvm_dirty_bitmap_bytes(memslot); memset(memslot->dirty_bitmap, 0, n); r = kvmppc_hv_get_dirty_log(kvm, memslot, memslot->dirty_bitmap); if (r) goto out; r = -EFAULT; if (copy_to_user(log->dirty_bitmap, memslot->dirty_bitmap, n)) goto out; r = 0; out: mutex_unlock(&kvm->slots_lock); return r; } static void kvmppc_core_free_memslot_hv(struct kvm_memory_slot *free, struct kvm_memory_slot *dont) { if (!dont || free->arch.rmap != dont->arch.rmap) { vfree(free->arch.rmap); free->arch.rmap = NULL; } } static int kvmppc_core_create_memslot_hv(struct kvm_memory_slot *slot, unsigned long npages) { slot->arch.rmap = vzalloc(npages * sizeof(*slot->arch.rmap)); if (!slot->arch.rmap) return -ENOMEM; return 0; } static int kvmppc_core_prepare_memory_region_hv(struct kvm *kvm, struct kvm_memory_slot *memslot, struct kvm_userspace_memory_region *mem) { return 0; } static void kvmppc_core_commit_memory_region_hv(struct kvm *kvm, struct kvm_userspace_memory_region *mem, const struct kvm_memory_slot *old) { unsigned long npages = mem->memory_size >> PAGE_SHIFT; struct kvm_memory_slot *memslot; if (npages && old->npages) { /* * If modifying a memslot, reset all the rmap dirty bits. * If this is a new memslot, we don't need to do anything * since the rmap array starts out as all zeroes, * i.e. no pages are dirty. */ memslot = id_to_memslot(kvm->memslots, mem->slot); kvmppc_hv_get_dirty_log(kvm, memslot, NULL); } } /* * Update LPCR values in kvm->arch and in vcores. * Caller must hold kvm->lock. */ void kvmppc_update_lpcr(struct kvm *kvm, unsigned long lpcr, unsigned long mask) { long int i; u32 cores_done = 0; if ((kvm->arch.lpcr & mask) == lpcr) return; kvm->arch.lpcr = (kvm->arch.lpcr & ~mask) | lpcr; for (i = 0; i < KVM_MAX_VCORES; ++i) { struct kvmppc_vcore *vc = kvm->arch.vcores[i]; if (!vc) continue; spin_lock(&vc->lock); vc->lpcr = (vc->lpcr & ~mask) | lpcr; spin_unlock(&vc->lock); if (++cores_done >= kvm->arch.online_vcores) break; } } static void kvmppc_mmu_destroy_hv(struct kvm_vcpu *vcpu) { return; } static int kvmppc_hv_setup_htab_rma(struct kvm_vcpu *vcpu) { int err = 0; struct kvm *kvm = vcpu->kvm; unsigned long hva; struct kvm_memory_slot *memslot; struct vm_area_struct *vma; unsigned long lpcr = 0, senc; unsigned long psize, porder; int srcu_idx; mutex_lock(&kvm->lock); if (kvm->arch.rma_setup_done) goto out; /* another vcpu beat us to it */ /* Allocate hashed page table (if not done already) and reset it */ if (!kvm->arch.hpt_virt) { err = kvmppc_alloc_hpt(kvm, NULL); if (err) { pr_err("KVM: Couldn't alloc HPT\n"); goto out; } } /* Look up the memslot for guest physical address 0 */ srcu_idx = srcu_read_lock(&kvm->srcu); memslot = gfn_to_memslot(kvm, 0); /* We must have some memory at 0 by now */ err = -EINVAL; if (!memslot || (memslot->flags & KVM_MEMSLOT_INVALID)) goto out_srcu; /* Look up the VMA for the start of this memory slot */ hva = memslot->userspace_addr; down_read(¤t->mm->mmap_sem); vma = find_vma(current->mm, hva); if (!vma || vma->vm_start > hva || (vma->vm_flags & VM_IO)) goto up_out; psize = vma_kernel_pagesize(vma); porder = __ilog2(psize); up_read(¤t->mm->mmap_sem); /* We can handle 4k, 64k or 16M pages in the VRMA */ err = -EINVAL; if (!(psize == 0x1000 || psize == 0x10000 || psize == 0x1000000)) goto out_srcu; /* Update VRMASD field in the LPCR */ senc = slb_pgsize_encoding(psize); kvm->arch.vrma_slb_v = senc | SLB_VSID_B_1T | (VRMA_VSID << SLB_VSID_SHIFT_1T); /* the -4 is to account for senc values starting at 0x10 */ lpcr = senc << (LPCR_VRMASD_SH - 4); /* Create HPTEs in the hash page table for the VRMA */ kvmppc_map_vrma(vcpu, memslot, porder); kvmppc_update_lpcr(kvm, lpcr, LPCR_VRMASD); /* Order updates to kvm->arch.lpcr etc. vs. rma_setup_done */ smp_wmb(); kvm->arch.rma_setup_done = 1; err = 0; out_srcu: srcu_read_unlock(&kvm->srcu, srcu_idx); out: mutex_unlock(&kvm->lock); return err; up_out: up_read(¤t->mm->mmap_sem); goto out_srcu; } static int kvmppc_core_init_vm_hv(struct kvm *kvm) { unsigned long lpcr, lpid; /* Allocate the guest's logical partition ID */ lpid = kvmppc_alloc_lpid(); if ((long)lpid < 0) return -ENOMEM; kvm->arch.lpid = lpid; /* * Since we don't flush the TLB when tearing down a VM, * and this lpid might have previously been used, * make sure we flush on each core before running the new VM. */ cpumask_setall(&kvm->arch.need_tlb_flush); /* Start out with the default set of hcalls enabled */ memcpy(kvm->arch.enabled_hcalls, default_enabled_hcalls, sizeof(kvm->arch.enabled_hcalls)); kvm->arch.host_sdr1 = mfspr(SPRN_SDR1); /* Init LPCR for virtual RMA mode */ kvm->arch.host_lpid = mfspr(SPRN_LPID); kvm->arch.host_lpcr = lpcr = mfspr(SPRN_LPCR); lpcr &= LPCR_PECE | LPCR_LPES; lpcr |= (4UL << LPCR_DPFD_SH) | LPCR_HDICE | LPCR_VPM0 | LPCR_VPM1; kvm->arch.vrma_slb_v = SLB_VSID_B_1T | (VRMA_VSID << SLB_VSID_SHIFT_1T); /* On POWER8 turn on online bit to enable PURR/SPURR */ if (cpu_has_feature(CPU_FTR_ARCH_207S)) lpcr |= LPCR_ONL; kvm->arch.lpcr = lpcr; /* * Track that we now have a HV mode VM active. This blocks secondary * CPU threads from coming online. */ kvm_hv_vm_activated(); return 0; } static void kvmppc_free_vcores(struct kvm *kvm) { long int i; for (i = 0; i < KVM_MAX_VCORES; ++i) { if (kvm->arch.vcores[i] && kvm->arch.vcores[i]->mpp_buffer) { struct kvmppc_vcore *vc = kvm->arch.vcores[i]; free_pages((unsigned long)vc->mpp_buffer, MPP_BUFFER_ORDER); } kfree(kvm->arch.vcores[i]); } kvm->arch.online_vcores = 0; } static void kvmppc_core_destroy_vm_hv(struct kvm *kvm) { kvm_hv_vm_deactivated(); kvmppc_free_vcores(kvm); kvmppc_free_hpt(kvm); } /* We don't need to emulate any privileged instructions or dcbz */ static int kvmppc_core_emulate_op_hv(struct kvm_run *run, struct kvm_vcpu *vcpu, unsigned int inst, int *advance) { return EMULATE_FAIL; } static int kvmppc_core_emulate_mtspr_hv(struct kvm_vcpu *vcpu, int sprn, ulong spr_val) { return EMULATE_FAIL; } static int kvmppc_core_emulate_mfspr_hv(struct kvm_vcpu *vcpu, int sprn, ulong *spr_val) { return EMULATE_FAIL; } static int kvmppc_core_check_processor_compat_hv(void) { if (!cpu_has_feature(CPU_FTR_HVMODE) || !cpu_has_feature(CPU_FTR_ARCH_206)) return -EIO; return 0; } static long kvm_arch_vm_ioctl_hv(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_ALLOCATE_HTAB: { u32 htab_order; r = -EFAULT; if (get_user(htab_order, (u32 __user *)argp)) break; r = kvmppc_alloc_reset_hpt(kvm, &htab_order); if (r) break; r = -EFAULT; if (put_user(htab_order, (u32 __user *)argp)) break; r = 0; break; } case KVM_PPC_GET_HTAB_FD: { struct kvm_get_htab_fd ghf; r = -EFAULT; if (copy_from_user(&ghf, argp, sizeof(ghf))) break; r = kvm_vm_ioctl_get_htab_fd(kvm, &ghf); break; } default: r = -ENOTTY; } return r; } /* * List of hcall numbers to enable by default. * For compatibility with old userspace, we enable by default * all hcalls that were implemented before the hcall-enabling * facility was added. Note this list should not include H_RTAS. */ static unsigned int default_hcall_list[] = { H_REMOVE, H_ENTER, H_READ, H_PROTECT, H_BULK_REMOVE, H_GET_TCE, H_PUT_TCE, H_SET_DABR, H_SET_XDABR, H_CEDE, H_PROD, H_CONFER, H_REGISTER_VPA, #ifdef CONFIG_KVM_XICS H_EOI, H_CPPR, H_IPI, H_IPOLL, H_XIRR, H_XIRR_X, #endif 0 }; static void init_default_hcalls(void) { int i; unsigned int hcall; for (i = 0; default_hcall_list[i]; ++i) { hcall = default_hcall_list[i]; WARN_ON(!kvmppc_hcall_impl_hv(hcall)); __set_bit(hcall / 4, default_enabled_hcalls); } } static struct kvmppc_ops kvm_ops_hv = { .get_sregs = kvm_arch_vcpu_ioctl_get_sregs_hv, .set_sregs = kvm_arch_vcpu_ioctl_set_sregs_hv, .get_one_reg = kvmppc_get_one_reg_hv, .set_one_reg = kvmppc_set_one_reg_hv, .vcpu_load = kvmppc_core_vcpu_load_hv, .vcpu_put = kvmppc_core_vcpu_put_hv, .set_msr = kvmppc_set_msr_hv, .vcpu_run = kvmppc_vcpu_run_hv, .vcpu_create = kvmppc_core_vcpu_create_hv, .vcpu_free = kvmppc_core_vcpu_free_hv, .check_requests = kvmppc_core_check_requests_hv, .get_dirty_log = kvm_vm_ioctl_get_dirty_log_hv, .flush_memslot = kvmppc_core_flush_memslot_hv, .prepare_memory_region = kvmppc_core_prepare_memory_region_hv, .commit_memory_region = kvmppc_core_commit_memory_region_hv, .unmap_hva = kvm_unmap_hva_hv, .unmap_hva_range = kvm_unmap_hva_range_hv, .age_hva = kvm_age_hva_hv, .test_age_hva = kvm_test_age_hva_hv, .set_spte_hva = kvm_set_spte_hva_hv, .mmu_destroy = kvmppc_mmu_destroy_hv, .free_memslot = kvmppc_core_free_memslot_hv, .create_memslot = kvmppc_core_create_memslot_hv, .init_vm = kvmppc_core_init_vm_hv, .destroy_vm = kvmppc_core_destroy_vm_hv, .get_smmu_info = kvm_vm_ioctl_get_smmu_info_hv, .emulate_op = kvmppc_core_emulate_op_hv, .emulate_mtspr = kvmppc_core_emulate_mtspr_hv, .emulate_mfspr = kvmppc_core_emulate_mfspr_hv, .fast_vcpu_kick = kvmppc_fast_vcpu_kick_hv, .arch_vm_ioctl = kvm_arch_vm_ioctl_hv, .hcall_implemented = kvmppc_hcall_impl_hv, }; static int kvmppc_book3s_init_hv(void) { int r; /* * FIXME!! Do we need to check on all cpus ? */ r = kvmppc_core_check_processor_compat_hv(); if (r < 0) return -ENODEV; kvm_ops_hv.owner = THIS_MODULE; kvmppc_hv_ops = &kvm_ops_hv; init_default_hcalls(); r = kvmppc_mmu_hv_init(); return r; } static void kvmppc_book3s_exit_hv(void) { kvmppc_hv_ops = NULL; } module_init(kvmppc_book3s_init_hv); module_exit(kvmppc_book3s_exit_hv); MODULE_LICENSE("GPL"); MODULE_ALIAS_MISCDEV(KVM_MINOR); MODULE_ALIAS("devname:kvm");