| /* |
| * Copyright 2011 Paul Mackerras, IBM Corp. <paulus@au1.ibm.com> |
| * Copyright (C) 2009. SUSE Linux Products GmbH. All rights reserved. |
| * |
| * Authors: |
| * Paul Mackerras <paulus@au1.ibm.com> |
| * Alexander Graf <agraf@suse.de> |
| * Kevin Wolf <mail@kevin-wolf.de> |
| * |
| * 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 <agraf@suse.de>. |
| * |
| * 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 <linux/kvm_host.h> |
| #include <linux/err.h> |
| #include <linux/slab.h> |
| #include <linux/preempt.h> |
| #include <linux/sched.h> |
| #include <linux/delay.h> |
| #include <linux/export.h> |
| #include <linux/fs.h> |
| #include <linux/anon_inodes.h> |
| #include <linux/cpumask.h> |
| #include <linux/spinlock.h> |
| #include <linux/page-flags.h> |
| #include <linux/srcu.h> |
| #include <linux/miscdevice.h> |
| |
| #include <asm/reg.h> |
| #include <asm/cputable.h> |
| #include <asm/cacheflush.h> |
| #include <asm/tlbflush.h> |
| #include <asm/uaccess.h> |
| #include <asm/io.h> |
| #include <asm/kvm_ppc.h> |
| #include <asm/kvm_book3s.h> |
| #include <asm/mmu_context.h> |
| #include <asm/lppaca.h> |
| #include <asm/processor.h> |
| #include <asm/cputhreads.h> |
| #include <asm/page.h> |
| #include <asm/hvcall.h> |
| #include <asm/switch_to.h> |
| #include <asm/smp.h> |
| #include <linux/gfp.h> |
| #include <linux/vmalloc.h> |
| #include <linux/highmem.h> |
| #include <linux/hugetlb.h> |
| #include <linux/module.h> |
| |
| #include "book3s.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 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 arch.tbacct_lock |
| * of the vcpu that has taken responsibility for running the vcore |
| * (i.e. vc->runner). 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; |
| |
| spin_lock_irqsave(&vcpu->arch.tbacct_lock, flags); |
| if (vc->runner == vcpu && vc->vcore_state != VCORE_INACTIVE && |
| vc->preempt_tb != TB_NIL) { |
| vc->stolen_tb += mftb() - vc->preempt_tb; |
| vc->preempt_tb = TB_NIL; |
| } |
| 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; |
| |
| spin_lock_irqsave(&vcpu->arch.tbacct_lock, flags); |
| if (vc->runner == vcpu && vc->vcore_state != VCORE_INACTIVE) |
| vc->preempt_tb = mftb(); |
| 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) { |
| if (!cpu_has_feature(CPU_FTR_ARCH_206)) |
| return -EINVAL; /* 970 has no compat mode support */ |
| |
| 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 = 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 { |
| u16 hword; |
| u32 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 = ((struct reg_vpa *)va)->length.hword; |
| else |
| len = ((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; |
| |
| /* |
| * If we are the task running the vcore, then since we hold |
| * the vcore lock, we can't be preempted, so stolen_tb/preempt_tb |
| * can't be updated, so we don't need the tbacct_lock. |
| * If the vcore is inactive, it can't become active (since we |
| * hold the vcore lock), so the vcpu load/put functions won't |
| * update stolen_tb/preempt_tb, and we don't need tbacct_lock. |
| */ |
| if (vc->vcore_state != VCORE_INACTIVE && |
| vc->runner->arch.run_task != current) { |
| spin_lock_irq(&vc->runner->arch.tbacct_lock); |
| p = vc->stolen_tb; |
| if (vc->preempt_tb != TB_NIL) |
| p += now - vc->preempt_tb; |
| spin_unlock_irq(&vc->runner->arch.tbacct_lock); |
| } else { |
| p = vc->stolen_tb; |
| } |
| 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 = vc->pcpu + vcpu->arch.ptid; |
| dt->timebase = now + vc->tb_offset; |
| dt->enqueue_to_dispatch_time = stolen; |
| dt->srr0 = kvmppc_get_pc(vcpu); |
| dt->srr1 = 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 = ++vcpu->arch.dtl_index; |
| vcpu->arch.dtl.dirty = true; |
| } |
| |
| int kvmppc_pseries_do_hcall(struct kvm_vcpu *vcpu) |
| { |
| unsigned long req = kvmppc_get_gpr(vcpu, 3); |
| unsigned long target, ret = H_SUCCESS; |
| struct kvm_vcpu *tvcpu; |
| int idx, rc; |
| |
| switch (req) { |
| case H_ENTER: |
| idx = srcu_read_lock(&vcpu->kvm->srcu); |
| ret = kvmppc_virtmode_h_enter(vcpu, kvmppc_get_gpr(vcpu, 4), |
| kvmppc_get_gpr(vcpu, 5), |
| kvmppc_get_gpr(vcpu, 6), |
| kvmppc_get_gpr(vcpu, 7)); |
| srcu_read_unlock(&vcpu->kvm->srcu, idx); |
| break; |
| 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; |
| } |
| kvm_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_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_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; |
| 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. |
| * We just generate a program interrupt to the guest, since |
| * we don't emulate any guest instructions at this stage. |
| */ |
| case BOOK3S_INTERRUPT_H_EMUL_ASSIST: |
| 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; |
| |
| kvmppc_set_pvr_hv(vcpu, sregs->pvr); |
| |
| 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) |
| { |
| struct kvmppc_vcore *vc = vcpu->arch.vcore; |
| u64 mask; |
| |
| 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 *kvm = vcpu->kvm; |
| struct kvm_vcpu *vcpu; |
| int i; |
| |
| mutex_lock(&kvm->lock); |
| 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; |
| } |
| mutex_unlock(&kvm->lock); |
| } |
| |
| /* |
| * 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; |
| vc->lpcr = (vc->lpcr & ~mask) | (new_lpcr & mask); |
| spin_unlock(&vc->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_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_FSCR: |
| *val = get_reg_val(id, vcpu->arch.fscr); |
| break; |
| case KVM_REG_PPC_PSPB: |
| *val = get_reg_val(id, vcpu->arch.pspb); |
| break; |
| case KVM_REG_PPC_EBBHR: |
| *val = get_reg_val(id, vcpu->arch.ebbhr); |
| break; |
| case KVM_REG_PPC_EBBRR: |
| *val = get_reg_val(id, vcpu->arch.ebbrr); |
| break; |
| case KVM_REG_PPC_BESCR: |
| *val = get_reg_val(id, vcpu->arch.bescr); |
| break; |
| case KVM_REG_PPC_TAR: |
| *val = get_reg_val(id, vcpu->arch.tar); |
| 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_IC: |
| *val = get_reg_val(id, vcpu->arch.ic); |
| break; |
| case KVM_REG_PPC_VTB: |
| *val = get_reg_val(id, vcpu->arch.vtb); |
| 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: |
| *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_FSCR: |
| vcpu->arch.fscr = set_reg_val(id, *val); |
| break; |
| case KVM_REG_PPC_PSPB: |
| vcpu->arch.pspb = set_reg_val(id, *val); |
| break; |
| case KVM_REG_PPC_EBBHR: |
| vcpu->arch.ebbhr = set_reg_val(id, *val); |
| break; |
| case KVM_REG_PPC_EBBRR: |
| vcpu->arch.ebbrr = set_reg_val(id, *val); |
| break; |
| case KVM_REG_PPC_BESCR: |
| vcpu->arch.bescr = set_reg_val(id, *val); |
| break; |
| case KVM_REG_PPC_TAR: |
| vcpu->arch.tar = 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_IC: |
| vcpu->arch.ic = set_reg_val(id, *val); |
| break; |
| case KVM_REG_PPC_VTB: |
| vcpu->arch.vtb = set_reg_val(id, *val); |
| 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)); |
| 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 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; |
| 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 = kzalloc(sizeof(struct kvmppc_vcore), GFP_KERNEL); |
| if (vcore) { |
| INIT_LIST_HEAD(&vcore->runnable_threads); |
| spin_lock_init(&vcore->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; |
| } |
| 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 = 1000; |
| |
| 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; |
| } |
| |
| /* |
| * 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->vcore_state = VCORE_STARTING; |
| vc->in_guest = 0; |
| vc->napping_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); |
| } |
| |
| /* 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(); |
| spin_unlock(&vc->lock); |
| |
| kvm_guest_enter(); |
| |
| srcu_idx = srcu_read_lock(&vc->kvm->srcu); |
| |
| __kvmppc_vcore_entry(); |
| |
| spin_lock(&vc->lock); |
| /* 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); |
| |
| 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); |
| } |
| } |
| } |
| |
| /* |
| * 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) |
| { |
| DEFINE_WAIT(wait); |
| |
| prepare_to_wait(&vc->wq, &wait, TASK_INTERRUPTIBLE); |
| vc->vcore_state = VCORE_SLEEPING; |
| spin_unlock(&vc->lock); |
| schedule(); |
| finish_wait(&vc->wq, &wait); |
| spin_lock(&vc->lock); |
| vc->vcore_state = VCORE_INACTIVE; |
| } |
| |
| 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; |
| |
| 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); |
| } 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); |
| } |
| |
| 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 or RMA */ |
| 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)) { |
| r = kvmppc_pseries_do_hcall(vcpu); |
| 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; |
| } |
| |
| |
| /* Work out RMLS (real mode limit selector) field value for a given RMA size. |
| Assumes POWER7 or PPC970. */ |
| static inline int lpcr_rmls(unsigned long rma_size) |
| { |
| switch (rma_size) { |
| case 32ul << 20: /* 32 MB */ |
| if (cpu_has_feature(CPU_FTR_ARCH_206)) |
| return 8; /* only supported on POWER7 */ |
| return -1; |
| case 64ul << 20: /* 64 MB */ |
| return 3; |
| case 128ul << 20: /* 128 MB */ |
| return 7; |
| case 256ul << 20: /* 256 MB */ |
| return 4; |
| case 1ul << 30: /* 1 GB */ |
| return 2; |
| case 16ul << 30: /* 16 GB */ |
| return 1; |
| case 256ul << 30: /* 256 GB */ |
| return 0; |
| default: |
| return -1; |
| } |
| } |
| |
| static int kvm_rma_fault(struct vm_area_struct *vma, struct vm_fault *vmf) |
| { |
| struct page *page; |
| struct kvm_rma_info *ri = vma->vm_file->private_data; |
| |
| if (vmf->pgoff >= kvm_rma_pages) |
| return VM_FAULT_SIGBUS; |
| |
| page = pfn_to_page(ri->base_pfn + vmf->pgoff); |
| get_page(page); |
| vmf->page = page; |
| return 0; |
| } |
| |
| static const struct vm_operations_struct kvm_rma_vm_ops = { |
| .fault = kvm_rma_fault, |
| }; |
| |
| static int kvm_rma_mmap(struct file *file, struct vm_area_struct *vma) |
| { |
| vma->vm_flags |= VM_DONTEXPAND | VM_DONTDUMP; |
| vma->vm_ops = &kvm_rma_vm_ops; |
| return 0; |
| } |
| |
| static int kvm_rma_release(struct inode *inode, struct file *filp) |
| { |
| struct kvm_rma_info *ri = filp->private_data; |
| |
| kvm_release_rma(ri); |
| return 0; |
| } |
| |
| static const struct file_operations kvm_rma_fops = { |
| .mmap = kvm_rma_mmap, |
| .release = kvm_rma_release, |
| }; |
| |
| static long kvm_vm_ioctl_allocate_rma(struct kvm *kvm, |
| struct kvm_allocate_rma *ret) |
| { |
| long fd; |
| struct kvm_rma_info *ri; |
| /* |
| * Only do this on PPC970 in HV mode |
| */ |
| if (!cpu_has_feature(CPU_FTR_HVMODE) || |
| !cpu_has_feature(CPU_FTR_ARCH_201)) |
| return -EINVAL; |
| |
| if (!kvm_rma_pages) |
| return -EINVAL; |
| |
| ri = kvm_alloc_rma(); |
| if (!ri) |
| return -ENOMEM; |
| |
| fd = anon_inode_getfd("kvm-rma", &kvm_rma_fops, ri, O_RDWR | O_CLOEXEC); |
| if (fd < 0) |
| kvm_release_rma(ri); |
| |
| ret->rma_size = kvm_rma_pages << PAGE_SHIFT; |
| return fd; |
| } |
| |
| 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; |
| /* |
| * Only return base page encoding. We don't want to return |
| * all the supporting pte_enc, because our H_ENTER doesn't |
| * support MPSS yet. Once they do, we can start passing all |
| * support pte_enc here |
| */ |
| (*sps)->enc[0].pte_enc = def->penc[linux_psize]; |
| (*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 unpin_slot(struct kvm_memory_slot *memslot) |
| { |
| unsigned long *physp; |
| unsigned long j, npages, pfn; |
| struct page *page; |
| |
| physp = memslot->arch.slot_phys; |
| npages = memslot->npages; |
| if (!physp) |
| return; |
| for (j = 0; j < npages; j++) { |
| if (!(physp[j] & KVMPPC_GOT_PAGE)) |
| continue; |
| pfn = physp[j] >> PAGE_SHIFT; |
| page = pfn_to_page(pfn); |
| SetPageDirty(page); |
| put_page(page); |
| } |
| } |
| |
| 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; |
| } |
| if (!dont || free->arch.slot_phys != dont->arch.slot_phys) { |
| unpin_slot(free); |
| vfree(free->arch.slot_phys); |
| free->arch.slot_phys = 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; |
| slot->arch.slot_phys = NULL; |
| |
| return 0; |
| } |
| |
| static int kvmppc_core_prepare_memory_region_hv(struct kvm *kvm, |
| struct kvm_memory_slot *memslot, |
| struct kvm_userspace_memory_region *mem) |
| { |
| unsigned long *phys; |
| |
| /* Allocate a slot_phys array if needed */ |
| phys = memslot->arch.slot_phys; |
| if (!kvm->arch.using_mmu_notifiers && !phys && memslot->npages) { |
| phys = vzalloc(memslot->npages * sizeof(unsigned long)); |
| if (!phys) |
| return -ENOMEM; |
| memslot->arch.slot_phys = phys; |
| } |
| |
| 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; |
| struct kvm_rma_info *ri = NULL; |
| unsigned long hva; |
| struct kvm_memory_slot *memslot; |
| struct vm_area_struct *vma; |
| unsigned long lpcr = 0, senc; |
| unsigned long lpcr_mask = 0; |
| unsigned long psize, porder; |
| unsigned long rma_size; |
| unsigned long rmls; |
| unsigned long *physp; |
| unsigned long i, npages; |
| 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); |
| |
| /* Is this one of our preallocated RMAs? */ |
| if (vma->vm_file && vma->vm_file->f_op == &kvm_rma_fops && |
| hva == vma->vm_start) |
| ri = vma->vm_file->private_data; |
| |
| up_read(¤t->mm->mmap_sem); |
| |
| if (!ri) { |
| /* On POWER7, use VRMA; on PPC970, give up */ |
| err = -EPERM; |
| if (cpu_has_feature(CPU_FTR_ARCH_201)) { |
| pr_err("KVM: CPU requires an RMO\n"); |
| goto out_srcu; |
| } |
| |
| /* 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); |
| lpcr_mask = LPCR_VRMASD; |
| /* 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); |
| |
| } else { |
| /* Set up to use an RMO region */ |
| rma_size = kvm_rma_pages; |
| if (rma_size > memslot->npages) |
| rma_size = memslot->npages; |
| rma_size <<= PAGE_SHIFT; |
| rmls = lpcr_rmls(rma_size); |
| err = -EINVAL; |
| if ((long)rmls < 0) { |
| pr_err("KVM: Can't use RMA of 0x%lx bytes\n", rma_size); |
| goto out_srcu; |
| } |
| atomic_inc(&ri->use_count); |
| kvm->arch.rma = ri; |
| |
| /* Update LPCR and RMOR */ |
| if (cpu_has_feature(CPU_FTR_ARCH_201)) { |
| /* PPC970; insert RMLS value (split field) in HID4 */ |
| lpcr_mask = (1ul << HID4_RMLS0_SH) | |
| (3ul << HID4_RMLS2_SH) | HID4_RMOR; |
| lpcr = ((rmls >> 2) << HID4_RMLS0_SH) | |
| ((rmls & 3) << HID4_RMLS2_SH); |
| /* RMOR is also in HID4 */ |
| lpcr |= ((ri->base_pfn >> (26 - PAGE_SHIFT)) & 0xffff) |
| << HID4_RMOR_SH; |
| } else { |
| /* POWER7 */ |
| lpcr_mask = LPCR_VPM0 | LPCR_VRMA_L | LPCR_RMLS; |
| lpcr = rmls << LPCR_RMLS_SH; |
| kvm->arch.rmor = ri->base_pfn << PAGE_SHIFT; |
| } |
| pr_info("KVM: Using RMO at %lx size %lx (LPCR = %lx)\n", |
| ri->base_pfn << PAGE_SHIFT, rma_size, lpcr); |
| |
| /* Initialize phys addrs of pages in RMO */ |
| npages = kvm_rma_pages; |
| porder = __ilog2(npages); |
| physp = memslot->arch.slot_phys; |
| if (physp) { |
| if (npages > memslot->npages) |
| npages = memslot->npages; |
| spin_lock(&kvm->arch.slot_phys_lock); |
| for (i = 0; i < npages; ++i) |
| physp[i] = ((ri->base_pfn + i) << PAGE_SHIFT) + |
| porder; |
| spin_unlock(&kvm->arch.slot_phys_lock); |
| } |
| } |
| |
| kvmppc_update_lpcr(kvm, lpcr, lpcr_mask); |
| |
| /* 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); |
| |
| kvm->arch.rma = NULL; |
| |
| kvm->arch.host_sdr1 = mfspr(SPRN_SDR1); |
| |
| if (cpu_has_feature(CPU_FTR_ARCH_201)) { |
| /* PPC970; HID4 is effectively the LPCR */ |
| kvm->arch.host_lpid = 0; |
| kvm->arch.host_lpcr = lpcr = mfspr(SPRN_HID4); |
| lpcr &= ~((3 << HID4_LPID1_SH) | (0xful << HID4_LPID5_SH)); |
| lpcr |= ((lpid >> 4) << HID4_LPID1_SH) | |
| ((lpid & 0xf) << HID4_LPID5_SH); |
| } else { |
| /* POWER7; 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; |
| |
| kvm->arch.using_mmu_notifiers = !!cpu_has_feature(CPU_FTR_ARCH_206); |
| spin_lock_init(&kvm->arch.slot_phys_lock); |
| |
| /* |
| * 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) |
| 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); |
| if (kvm->arch.rma) { |
| kvm_release_rma(kvm->arch.rma); |
| kvm->arch.rma = NULL; |
| } |
| |
| 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)) |
| 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_ALLOCATE_RMA: { |
| struct kvm_allocate_rma rma; |
| struct kvm *kvm = filp->private_data; |
| |
| r = kvm_vm_ioctl_allocate_rma(kvm, &rma); |
| if (r >= 0 && copy_to_user(argp, &rma, sizeof(rma))) |
| r = -EFAULT; |
| break; |
| } |
| |
| 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; |
| } |
| |
| 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, |
| }; |
| |
| 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; |
| |
| 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"); |