1321 lines
32 KiB
C
1321 lines
32 KiB
C
/*
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* Copyright 2011 Paul Mackerras, IBM Corp. <paulus@au1.ibm.com>
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* Copyright (C) 2009. SUSE Linux Products GmbH. All rights reserved.
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*
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* Authors:
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* Paul Mackerras <paulus@au1.ibm.com>
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* Alexander Graf <agraf@suse.de>
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* Kevin Wolf <mail@kevin-wolf.de>
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*
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* Description: KVM functions specific to running on Book 3S
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* processors in hypervisor mode (specifically POWER7 and later).
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*
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* This file is derived from arch/powerpc/kvm/book3s.c,
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* by Alexander Graf <agraf@suse.de>.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License, version 2, as
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* published by the Free Software Foundation.
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*/
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#include <linux/kvm_host.h>
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#include <linux/err.h>
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#include <linux/slab.h>
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#include <linux/preempt.h>
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#include <linux/sched.h>
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#include <linux/delay.h>
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#include <linux/export.h>
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#include <linux/fs.h>
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#include <linux/anon_inodes.h>
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#include <linux/cpumask.h>
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#include <linux/spinlock.h>
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#include <linux/page-flags.h>
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#include <asm/reg.h>
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#include <asm/cputable.h>
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#include <asm/cacheflush.h>
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#include <asm/tlbflush.h>
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#include <asm/uaccess.h>
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#include <asm/io.h>
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#include <asm/kvm_ppc.h>
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#include <asm/kvm_book3s.h>
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#include <asm/mmu_context.h>
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#include <asm/lppaca.h>
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#include <asm/processor.h>
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#include <asm/cputhreads.h>
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#include <asm/page.h>
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#include <asm/hvcall.h>
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#include <linux/gfp.h>
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#include <linux/sched.h>
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#include <linux/vmalloc.h>
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#include <linux/highmem.h>
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/*
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* For now, limit memory to 64GB and require it to be large pages.
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* This value is chosen because it makes the ram_pginfo array be
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* 64kB in size, which is about as large as we want to be trying
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* to allocate with kmalloc.
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*/
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#define MAX_MEM_ORDER 36
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#define LARGE_PAGE_ORDER 24 /* 16MB pages */
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/* #define EXIT_DEBUG */
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/* #define EXIT_DEBUG_SIMPLE */
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/* #define EXIT_DEBUG_INT */
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static void kvmppc_end_cede(struct kvm_vcpu *vcpu);
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void kvmppc_core_vcpu_load(struct kvm_vcpu *vcpu, int cpu)
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{
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local_paca->kvm_hstate.kvm_vcpu = vcpu;
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local_paca->kvm_hstate.kvm_vcore = vcpu->arch.vcore;
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}
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void kvmppc_core_vcpu_put(struct kvm_vcpu *vcpu)
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{
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}
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void kvmppc_set_msr(struct kvm_vcpu *vcpu, u64 msr)
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{
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vcpu->arch.shregs.msr = msr;
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kvmppc_end_cede(vcpu);
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}
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void kvmppc_set_pvr(struct kvm_vcpu *vcpu, u32 pvr)
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{
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vcpu->arch.pvr = pvr;
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}
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void kvmppc_dump_regs(struct kvm_vcpu *vcpu)
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{
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int r;
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pr_err("vcpu %p (%d):\n", vcpu, vcpu->vcpu_id);
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pr_err("pc = %.16lx msr = %.16llx trap = %x\n",
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vcpu->arch.pc, vcpu->arch.shregs.msr, vcpu->arch.trap);
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for (r = 0; r < 16; ++r)
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pr_err("r%2d = %.16lx r%d = %.16lx\n",
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r, kvmppc_get_gpr(vcpu, r),
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r+16, kvmppc_get_gpr(vcpu, r+16));
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pr_err("ctr = %.16lx lr = %.16lx\n",
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vcpu->arch.ctr, vcpu->arch.lr);
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pr_err("srr0 = %.16llx srr1 = %.16llx\n",
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vcpu->arch.shregs.srr0, vcpu->arch.shregs.srr1);
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pr_err("sprg0 = %.16llx sprg1 = %.16llx\n",
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vcpu->arch.shregs.sprg0, vcpu->arch.shregs.sprg1);
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pr_err("sprg2 = %.16llx sprg3 = %.16llx\n",
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vcpu->arch.shregs.sprg2, vcpu->arch.shregs.sprg3);
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pr_err("cr = %.8x xer = %.16lx dsisr = %.8x\n",
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vcpu->arch.cr, vcpu->arch.xer, vcpu->arch.shregs.dsisr);
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pr_err("dar = %.16llx\n", vcpu->arch.shregs.dar);
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pr_err("fault dar = %.16lx dsisr = %.8x\n",
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vcpu->arch.fault_dar, vcpu->arch.fault_dsisr);
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pr_err("SLB (%d entries):\n", vcpu->arch.slb_max);
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for (r = 0; r < vcpu->arch.slb_max; ++r)
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pr_err(" ESID = %.16llx VSID = %.16llx\n",
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vcpu->arch.slb[r].orige, vcpu->arch.slb[r].origv);
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pr_err("lpcr = %.16lx sdr1 = %.16lx last_inst = %.8x\n",
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vcpu->kvm->arch.lpcr, vcpu->kvm->arch.sdr1,
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vcpu->arch.last_inst);
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}
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struct kvm_vcpu *kvmppc_find_vcpu(struct kvm *kvm, int id)
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{
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int r;
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struct kvm_vcpu *v, *ret = NULL;
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mutex_lock(&kvm->lock);
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kvm_for_each_vcpu(r, v, kvm) {
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if (v->vcpu_id == id) {
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ret = v;
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break;
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}
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}
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mutex_unlock(&kvm->lock);
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return ret;
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}
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static void init_vpa(struct kvm_vcpu *vcpu, struct lppaca *vpa)
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{
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vpa->shared_proc = 1;
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vpa->yield_count = 1;
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}
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static unsigned long do_h_register_vpa(struct kvm_vcpu *vcpu,
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unsigned long flags,
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unsigned long vcpuid, unsigned long vpa)
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{
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struct kvm *kvm = vcpu->kvm;
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unsigned long pg_index, ra, len;
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unsigned long pg_offset;
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void *va;
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struct kvm_vcpu *tvcpu;
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tvcpu = kvmppc_find_vcpu(kvm, vcpuid);
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if (!tvcpu)
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return H_PARAMETER;
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flags >>= 63 - 18;
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flags &= 7;
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if (flags == 0 || flags == 4)
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return H_PARAMETER;
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if (flags < 4) {
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if (vpa & 0x7f)
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return H_PARAMETER;
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/* registering new area; convert logical addr to real */
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pg_index = vpa >> kvm->arch.ram_porder;
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pg_offset = vpa & (kvm->arch.ram_psize - 1);
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if (pg_index >= kvm->arch.ram_npages)
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return H_PARAMETER;
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if (kvm->arch.ram_pginfo[pg_index].pfn == 0)
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return H_PARAMETER;
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ra = kvm->arch.ram_pginfo[pg_index].pfn << PAGE_SHIFT;
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ra |= pg_offset;
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va = __va(ra);
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if (flags <= 1)
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len = *(unsigned short *)(va + 4);
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else
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len = *(unsigned int *)(va + 4);
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if (pg_offset + len > kvm->arch.ram_psize)
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return H_PARAMETER;
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switch (flags) {
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case 1: /* register VPA */
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if (len < 640)
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return H_PARAMETER;
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tvcpu->arch.vpa = va;
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init_vpa(vcpu, va);
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break;
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case 2: /* register DTL */
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if (len < 48)
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return H_PARAMETER;
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if (!tvcpu->arch.vpa)
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return H_RESOURCE;
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len -= len % 48;
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tvcpu->arch.dtl = va;
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tvcpu->arch.dtl_end = va + len;
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break;
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case 3: /* register SLB shadow buffer */
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if (len < 8)
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return H_PARAMETER;
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if (!tvcpu->arch.vpa)
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return H_RESOURCE;
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tvcpu->arch.slb_shadow = va;
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len = (len - 16) / 16;
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tvcpu->arch.slb_shadow = va;
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break;
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}
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} else {
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switch (flags) {
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case 5: /* unregister VPA */
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if (tvcpu->arch.slb_shadow || tvcpu->arch.dtl)
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return H_RESOURCE;
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tvcpu->arch.vpa = NULL;
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break;
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case 6: /* unregister DTL */
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tvcpu->arch.dtl = NULL;
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break;
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case 7: /* unregister SLB shadow buffer */
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tvcpu->arch.slb_shadow = NULL;
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break;
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}
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}
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return H_SUCCESS;
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}
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int kvmppc_pseries_do_hcall(struct kvm_vcpu *vcpu)
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{
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unsigned long req = kvmppc_get_gpr(vcpu, 3);
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unsigned long target, ret = H_SUCCESS;
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struct kvm_vcpu *tvcpu;
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switch (req) {
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case H_CEDE:
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break;
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case H_PROD:
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target = kvmppc_get_gpr(vcpu, 4);
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tvcpu = kvmppc_find_vcpu(vcpu->kvm, target);
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if (!tvcpu) {
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ret = H_PARAMETER;
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break;
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}
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tvcpu->arch.prodded = 1;
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smp_mb();
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if (vcpu->arch.ceded) {
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if (waitqueue_active(&vcpu->wq)) {
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wake_up_interruptible(&vcpu->wq);
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vcpu->stat.halt_wakeup++;
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}
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}
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break;
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case H_CONFER:
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break;
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case H_REGISTER_VPA:
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ret = do_h_register_vpa(vcpu, kvmppc_get_gpr(vcpu, 4),
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kvmppc_get_gpr(vcpu, 5),
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kvmppc_get_gpr(vcpu, 6));
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break;
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default:
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return RESUME_HOST;
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}
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kvmppc_set_gpr(vcpu, 3, ret);
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vcpu->arch.hcall_needed = 0;
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return RESUME_GUEST;
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}
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static int kvmppc_handle_exit(struct kvm_run *run, struct kvm_vcpu *vcpu,
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struct task_struct *tsk)
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{
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int r = RESUME_HOST;
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vcpu->stat.sum_exits++;
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run->exit_reason = KVM_EXIT_UNKNOWN;
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run->ready_for_interrupt_injection = 1;
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switch (vcpu->arch.trap) {
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/* We're good on these - the host merely wanted to get our attention */
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case BOOK3S_INTERRUPT_HV_DECREMENTER:
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vcpu->stat.dec_exits++;
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r = RESUME_GUEST;
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break;
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case BOOK3S_INTERRUPT_EXTERNAL:
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vcpu->stat.ext_intr_exits++;
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r = RESUME_GUEST;
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break;
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case BOOK3S_INTERRUPT_PERFMON:
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r = RESUME_GUEST;
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break;
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case BOOK3S_INTERRUPT_PROGRAM:
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{
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ulong flags;
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/*
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* Normally program interrupts are delivered directly
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* to the guest by the hardware, but we can get here
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* as a result of a hypervisor emulation interrupt
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* (e40) getting turned into a 700 by BML RTAS.
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*/
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flags = vcpu->arch.shregs.msr & 0x1f0000ull;
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kvmppc_core_queue_program(vcpu, flags);
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r = RESUME_GUEST;
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break;
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}
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case BOOK3S_INTERRUPT_SYSCALL:
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{
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/* hcall - punt to userspace */
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int i;
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if (vcpu->arch.shregs.msr & MSR_PR) {
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/* sc 1 from userspace - reflect to guest syscall */
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kvmppc_book3s_queue_irqprio(vcpu, BOOK3S_INTERRUPT_SYSCALL);
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r = RESUME_GUEST;
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break;
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}
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run->papr_hcall.nr = kvmppc_get_gpr(vcpu, 3);
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for (i = 0; i < 9; ++i)
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run->papr_hcall.args[i] = kvmppc_get_gpr(vcpu, 4 + i);
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run->exit_reason = KVM_EXIT_PAPR_HCALL;
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vcpu->arch.hcall_needed = 1;
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r = RESUME_HOST;
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break;
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}
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/*
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* We get these next two if the guest does a bad real-mode access,
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* as we have enabled VRMA (virtualized real mode area) mode in the
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* LPCR. We just generate an appropriate DSI/ISI to the guest.
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*/
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case BOOK3S_INTERRUPT_H_DATA_STORAGE:
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vcpu->arch.shregs.dsisr = vcpu->arch.fault_dsisr;
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vcpu->arch.shregs.dar = vcpu->arch.fault_dar;
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kvmppc_inject_interrupt(vcpu, BOOK3S_INTERRUPT_DATA_STORAGE, 0);
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r = RESUME_GUEST;
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break;
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case BOOK3S_INTERRUPT_H_INST_STORAGE:
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kvmppc_inject_interrupt(vcpu, BOOK3S_INTERRUPT_INST_STORAGE,
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0x08000000);
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r = RESUME_GUEST;
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break;
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/*
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* This occurs if the guest executes an illegal instruction.
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* We just generate a program interrupt to the guest, since
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* we don't emulate any guest instructions at this stage.
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*/
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case BOOK3S_INTERRUPT_H_EMUL_ASSIST:
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kvmppc_core_queue_program(vcpu, 0x80000);
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r = RESUME_GUEST;
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break;
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default:
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kvmppc_dump_regs(vcpu);
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printk(KERN_EMERG "trap=0x%x | pc=0x%lx | msr=0x%llx\n",
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vcpu->arch.trap, kvmppc_get_pc(vcpu),
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vcpu->arch.shregs.msr);
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r = RESUME_HOST;
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BUG();
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break;
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}
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return r;
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}
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int kvm_arch_vcpu_ioctl_get_sregs(struct kvm_vcpu *vcpu,
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struct kvm_sregs *sregs)
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{
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int i;
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sregs->pvr = vcpu->arch.pvr;
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memset(sregs, 0, sizeof(struct kvm_sregs));
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for (i = 0; i < vcpu->arch.slb_max; i++) {
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sregs->u.s.ppc64.slb[i].slbe = vcpu->arch.slb[i].orige;
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sregs->u.s.ppc64.slb[i].slbv = vcpu->arch.slb[i].origv;
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}
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return 0;
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}
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int kvm_arch_vcpu_ioctl_set_sregs(struct kvm_vcpu *vcpu,
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struct kvm_sregs *sregs)
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{
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int i, j;
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kvmppc_set_pvr(vcpu, sregs->pvr);
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j = 0;
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for (i = 0; i < vcpu->arch.slb_nr; i++) {
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if (sregs->u.s.ppc64.slb[i].slbe & SLB_ESID_V) {
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vcpu->arch.slb[j].orige = sregs->u.s.ppc64.slb[i].slbe;
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vcpu->arch.slb[j].origv = sregs->u.s.ppc64.slb[i].slbv;
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++j;
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}
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}
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vcpu->arch.slb_max = j;
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return 0;
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}
|
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int kvmppc_core_check_processor_compat(void)
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{
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if (cpu_has_feature(CPU_FTR_HVMODE))
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return 0;
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return -EIO;
|
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}
|
|
|
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struct kvm_vcpu *kvmppc_core_vcpu_create(struct kvm *kvm, unsigned int id)
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{
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struct kvm_vcpu *vcpu;
|
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int err = -EINVAL;
|
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int core;
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struct kvmppc_vcore *vcore;
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core = id / threads_per_core;
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if (core >= KVM_MAX_VCORES)
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goto out;
|
|
|
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err = -ENOMEM;
|
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vcpu = kzalloc(sizeof(struct kvm_vcpu), GFP_KERNEL);
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if (!vcpu)
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goto out;
|
|
|
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err = kvm_vcpu_init(vcpu, kvm, id);
|
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if (err)
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goto free_vcpu;
|
|
|
|
vcpu->arch.shared = &vcpu->arch.shregs;
|
|
vcpu->arch.last_cpu = -1;
|
|
vcpu->arch.mmcr[0] = MMCR0_FC;
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|
vcpu->arch.ctrl = CTRL_RUNLATCH;
|
|
/* default to host PVR, since we can't spoof it */
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vcpu->arch.pvr = mfspr(SPRN_PVR);
|
|
kvmppc_set_pvr(vcpu, vcpu->arch.pvr);
|
|
|
|
kvmppc_mmu_book3s_hv_init(vcpu);
|
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|
|
/*
|
|
* We consider the vcpu stopped until we see the first run ioctl for it.
|
|
*/
|
|
vcpu->arch.state = KVMPPC_VCPU_STOPPED;
|
|
|
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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);
|
|
}
|
|
kvm->arch.vcores[core] = vcore;
|
|
}
|
|
mutex_unlock(&kvm->lock);
|
|
|
|
if (!vcore)
|
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goto free_vcpu;
|
|
|
|
spin_lock(&vcore->lock);
|
|
++vcore->num_threads;
|
|
spin_unlock(&vcore->lock);
|
|
vcpu->arch.vcore = vcore;
|
|
|
|
vcpu->arch.cpu_type = KVM_CPU_3S_64;
|
|
kvmppc_sanity_check(vcpu);
|
|
|
|
return vcpu;
|
|
|
|
free_vcpu:
|
|
kfree(vcpu);
|
|
out:
|
|
return ERR_PTR(err);
|
|
}
|
|
|
|
void kvmppc_core_vcpu_free(struct kvm_vcpu *vcpu)
|
|
{
|
|
kvm_vcpu_uninit(vcpu);
|
|
kfree(vcpu);
|
|
}
|
|
|
|
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_deliver_interrupts(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 int __kvmppc_vcore_entry(struct kvm_run *kvm_run, struct kvm_vcpu *vcpu);
|
|
extern void xics_wake_cpu(int cpu);
|
|
|
|
static void kvmppc_remove_runnable(struct kvmppc_vcore *vc,
|
|
struct kvm_vcpu *vcpu)
|
|
{
|
|
struct kvm_vcpu *v;
|
|
|
|
if (vcpu->arch.state != KVMPPC_VCPU_RUNNABLE)
|
|
return;
|
|
vcpu->arch.state = KVMPPC_VCPU_BUSY_IN_HOST;
|
|
--vc->n_runnable;
|
|
++vc->n_busy;
|
|
/* decrement the physical thread id of each following vcpu */
|
|
v = vcpu;
|
|
list_for_each_entry_continue(v, &vc->runnable_threads, arch.run_list)
|
|
--v->arch.ptid;
|
|
list_del(&vcpu->arch.run_list);
|
|
}
|
|
|
|
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.napping = 0;
|
|
vcpu->cpu = vc->pcpu;
|
|
smp_wmb();
|
|
#ifdef CONFIG_PPC_ICP_NATIVE
|
|
if (vcpu->arch.ptid) {
|
|
tpaca->cpu_start = 0x80;
|
|
wmb();
|
|
xics_wake_cpu(cpu);
|
|
++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.
|
|
*/
|
|
static int on_primary_thread(void)
|
|
{
|
|
int cpu = smp_processor_id();
|
|
int thr = cpu_thread_in_core(cpu);
|
|
|
|
if (thr)
|
|
return 0;
|
|
while (++thr < threads_per_core)
|
|
if (cpu_online(cpu + thr))
|
|
return 0;
|
|
return 1;
|
|
}
|
|
|
|
/*
|
|
* Run a set of guest threads on a physical core.
|
|
* Called with vc->lock held.
|
|
*/
|
|
static int kvmppc_run_core(struct kvmppc_vcore *vc)
|
|
{
|
|
struct kvm_vcpu *vcpu, *vcpu0, *vnext;
|
|
long ret;
|
|
u64 now;
|
|
int ptid;
|
|
|
|
/* don't start if any threads have a signal pending */
|
|
list_for_each_entry(vcpu, &vc->runnable_threads, arch.run_list)
|
|
if (signal_pending(vcpu->arch.run_task))
|
|
return 0;
|
|
|
|
/*
|
|
* Make sure we are running on thread 0, and that
|
|
* secondary threads are offline.
|
|
* XXX we should also block attempts to bring any
|
|
* secondary threads online.
|
|
*/
|
|
if (threads_per_core > 1 && !on_primary_thread()) {
|
|
list_for_each_entry(vcpu, &vc->runnable_threads, arch.run_list)
|
|
vcpu->arch.ret = -EBUSY;
|
|
goto out;
|
|
}
|
|
|
|
/*
|
|
* Assign physical thread IDs, first to non-ceded vcpus
|
|
* and then to ceded ones.
|
|
*/
|
|
ptid = 0;
|
|
vcpu0 = NULL;
|
|
list_for_each_entry(vcpu, &vc->runnable_threads, arch.run_list) {
|
|
if (!vcpu->arch.ceded) {
|
|
if (!ptid)
|
|
vcpu0 = vcpu;
|
|
vcpu->arch.ptid = ptid++;
|
|
}
|
|
}
|
|
if (!vcpu0)
|
|
return 0; /* nothing to run */
|
|
list_for_each_entry(vcpu, &vc->runnable_threads, arch.run_list)
|
|
if (vcpu->arch.ceded)
|
|
vcpu->arch.ptid = ptid++;
|
|
|
|
vc->n_woken = 0;
|
|
vc->nap_count = 0;
|
|
vc->entry_exit_count = 0;
|
|
vc->vcore_state = VCORE_RUNNING;
|
|
vc->in_guest = 0;
|
|
vc->pcpu = smp_processor_id();
|
|
vc->napping_threads = 0;
|
|
list_for_each_entry(vcpu, &vc->runnable_threads, arch.run_list)
|
|
kvmppc_start_thread(vcpu);
|
|
|
|
preempt_disable();
|
|
spin_unlock(&vc->lock);
|
|
|
|
kvm_guest_enter();
|
|
__kvmppc_vcore_entry(NULL, vcpu0);
|
|
|
|
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);
|
|
/* prevent other vcpu threads from doing kvmppc_start_thread() now */
|
|
vc->vcore_state = VCORE_EXITING;
|
|
spin_unlock(&vc->lock);
|
|
|
|
/* make sure updates to secondary vcpu structs are visible now */
|
|
smp_mb();
|
|
kvm_guest_exit();
|
|
|
|
preempt_enable();
|
|
kvm_resched(vcpu);
|
|
|
|
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(vcpu->arch.kvm_run, vcpu,
|
|
vcpu->arch.run_task);
|
|
|
|
vcpu->arch.ret = ret;
|
|
vcpu->arch.trap = 0;
|
|
|
|
if (vcpu->arch.ceded) {
|
|
if (ret != RESUME_GUEST)
|
|
kvmppc_end_cede(vcpu);
|
|
else
|
|
kvmppc_set_timer(vcpu);
|
|
}
|
|
}
|
|
|
|
spin_lock(&vc->lock);
|
|
out:
|
|
vc->vcore_state = VCORE_INACTIVE;
|
|
list_for_each_entry_safe(vcpu, vnext, &vc->runnable_threads,
|
|
arch.run_list) {
|
|
if (vcpu->arch.ret != RESUME_GUEST) {
|
|
kvmppc_remove_runnable(vc, vcpu);
|
|
wake_up(&vcpu->arch.cpu_run);
|
|
}
|
|
}
|
|
|
|
return 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)
|
|
{
|
|
DEFINE_WAIT(wait);
|
|
struct kvm_vcpu *v;
|
|
int all_idle = 1;
|
|
|
|
prepare_to_wait(&vc->wq, &wait, TASK_INTERRUPTIBLE);
|
|
vc->vcore_state = VCORE_SLEEPING;
|
|
spin_unlock(&vc->lock);
|
|
list_for_each_entry(v, &vc->runnable_threads, arch.run_list) {
|
|
if (!v->arch.ceded || v->arch.pending_exceptions) {
|
|
all_idle = 0;
|
|
break;
|
|
}
|
|
}
|
|
if (all_idle)
|
|
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;
|
|
int prev_state;
|
|
struct kvmppc_vcore *vc;
|
|
struct kvm_vcpu *v, *vn;
|
|
|
|
kvm_run->exit_reason = 0;
|
|
vcpu->arch.ret = RESUME_GUEST;
|
|
vcpu->arch.trap = 0;
|
|
|
|
/*
|
|
* 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;
|
|
prev_state = vcpu->arch.state;
|
|
vcpu->arch.state = KVMPPC_VCPU_RUNNABLE;
|
|
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 (prev_state == KVMPPC_VCPU_STOPPED) {
|
|
if (vc->vcore_state == VCORE_RUNNING &&
|
|
VCORE_EXIT_COUNT(vc) == 0) {
|
|
vcpu->arch.ptid = vc->n_runnable - 1;
|
|
kvmppc_start_thread(vcpu);
|
|
}
|
|
|
|
} else if (prev_state == KVMPPC_VCPU_BUSY_IN_HOST)
|
|
--vc->n_busy;
|
|
|
|
while (vcpu->arch.state == KVMPPC_VCPU_RUNNABLE &&
|
|
!signal_pending(current)) {
|
|
if (vc->n_busy || vc->vcore_state != VCORE_INACTIVE) {
|
|
spin_unlock(&vc->lock);
|
|
kvmppc_wait_for_exec(vcpu, TASK_INTERRUPTIBLE);
|
|
spin_lock(&vc->lock);
|
|
continue;
|
|
}
|
|
n_ceded = 0;
|
|
list_for_each_entry(v, &vc->runnable_threads, arch.run_list)
|
|
n_ceded += v->arch.ceded;
|
|
if (n_ceded == vc->n_runnable)
|
|
kvmppc_vcore_blocked(vc);
|
|
else
|
|
kvmppc_run_core(vc);
|
|
|
|
list_for_each_entry_safe(v, vn, &vc->runnable_threads,
|
|
arch.run_list) {
|
|
kvmppc_core_deliver_interrupts(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 (signal_pending(current)) {
|
|
if (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;
|
|
}
|
|
}
|
|
|
|
spin_unlock(&vc->lock);
|
|
return vcpu->arch.ret;
|
|
}
|
|
|
|
int kvmppc_vcpu_run(struct kvm_run *run, struct kvm_vcpu *vcpu)
|
|
{
|
|
int r;
|
|
|
|
if (!vcpu->arch.sane) {
|
|
run->exit_reason = KVM_EXIT_INTERNAL_ERROR;
|
|
return -EINVAL;
|
|
}
|
|
|
|
/* 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;
|
|
}
|
|
|
|
/* On PPC970, check that we have an RMA region */
|
|
if (!vcpu->kvm->arch.rma && cpu_has_feature(CPU_FTR_ARCH_201))
|
|
return -EPERM;
|
|
|
|
flush_fp_to_thread(current);
|
|
flush_altivec_to_thread(current);
|
|
flush_vsx_to_thread(current);
|
|
vcpu->arch.wqp = &vcpu->arch.vcore->wq;
|
|
|
|
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_deliver_interrupts(vcpu);
|
|
}
|
|
} while (r == RESUME_GUEST);
|
|
return r;
|
|
}
|
|
|
|
static long kvmppc_stt_npages(unsigned long window_size)
|
|
{
|
|
return ALIGN((window_size >> SPAPR_TCE_SHIFT)
|
|
* sizeof(u64), PAGE_SIZE) / PAGE_SIZE;
|
|
}
|
|
|
|
static void release_spapr_tce_table(struct kvmppc_spapr_tce_table *stt)
|
|
{
|
|
struct kvm *kvm = stt->kvm;
|
|
int i;
|
|
|
|
mutex_lock(&kvm->lock);
|
|
list_del(&stt->list);
|
|
for (i = 0; i < kvmppc_stt_npages(stt->window_size); i++)
|
|
__free_page(stt->pages[i]);
|
|
kfree(stt);
|
|
mutex_unlock(&kvm->lock);
|
|
|
|
kvm_put_kvm(kvm);
|
|
}
|
|
|
|
static int kvm_spapr_tce_fault(struct vm_area_struct *vma, struct vm_fault *vmf)
|
|
{
|
|
struct kvmppc_spapr_tce_table *stt = vma->vm_file->private_data;
|
|
struct page *page;
|
|
|
|
if (vmf->pgoff >= kvmppc_stt_npages(stt->window_size))
|
|
return VM_FAULT_SIGBUS;
|
|
|
|
page = stt->pages[vmf->pgoff];
|
|
get_page(page);
|
|
vmf->page = page;
|
|
return 0;
|
|
}
|
|
|
|
static const struct vm_operations_struct kvm_spapr_tce_vm_ops = {
|
|
.fault = kvm_spapr_tce_fault,
|
|
};
|
|
|
|
static int kvm_spapr_tce_mmap(struct file *file, struct vm_area_struct *vma)
|
|
{
|
|
vma->vm_ops = &kvm_spapr_tce_vm_ops;
|
|
return 0;
|
|
}
|
|
|
|
static int kvm_spapr_tce_release(struct inode *inode, struct file *filp)
|
|
{
|
|
struct kvmppc_spapr_tce_table *stt = filp->private_data;
|
|
|
|
release_spapr_tce_table(stt);
|
|
return 0;
|
|
}
|
|
|
|
static struct file_operations kvm_spapr_tce_fops = {
|
|
.mmap = kvm_spapr_tce_mmap,
|
|
.release = kvm_spapr_tce_release,
|
|
};
|
|
|
|
long kvm_vm_ioctl_create_spapr_tce(struct kvm *kvm,
|
|
struct kvm_create_spapr_tce *args)
|
|
{
|
|
struct kvmppc_spapr_tce_table *stt = NULL;
|
|
long npages;
|
|
int ret = -ENOMEM;
|
|
int i;
|
|
|
|
/* Check this LIOBN hasn't been previously allocated */
|
|
list_for_each_entry(stt, &kvm->arch.spapr_tce_tables, list) {
|
|
if (stt->liobn == args->liobn)
|
|
return -EBUSY;
|
|
}
|
|
|
|
npages = kvmppc_stt_npages(args->window_size);
|
|
|
|
stt = kzalloc(sizeof(*stt) + npages* sizeof(struct page *),
|
|
GFP_KERNEL);
|
|
if (!stt)
|
|
goto fail;
|
|
|
|
stt->liobn = args->liobn;
|
|
stt->window_size = args->window_size;
|
|
stt->kvm = kvm;
|
|
|
|
for (i = 0; i < npages; i++) {
|
|
stt->pages[i] = alloc_page(GFP_KERNEL | __GFP_ZERO);
|
|
if (!stt->pages[i])
|
|
goto fail;
|
|
}
|
|
|
|
kvm_get_kvm(kvm);
|
|
|
|
mutex_lock(&kvm->lock);
|
|
list_add(&stt->list, &kvm->arch.spapr_tce_tables);
|
|
|
|
mutex_unlock(&kvm->lock);
|
|
|
|
return anon_inode_getfd("kvm-spapr-tce", &kvm_spapr_tce_fops,
|
|
stt, O_RDWR);
|
|
|
|
fail:
|
|
if (stt) {
|
|
for (i = 0; i < npages; i++)
|
|
if (stt->pages[i])
|
|
__free_page(stt->pages[i]);
|
|
|
|
kfree(stt);
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
/* 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 kvmppc_rma_info *ri = vma->vm_file->private_data;
|
|
struct page *page;
|
|
|
|
if (vmf->pgoff >= ri->npages)
|
|
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_RESERVED;
|
|
vma->vm_ops = &kvm_rma_vm_ops;
|
|
return 0;
|
|
}
|
|
|
|
static int kvm_rma_release(struct inode *inode, struct file *filp)
|
|
{
|
|
struct kvmppc_rma_info *ri = filp->private_data;
|
|
|
|
kvm_release_rma(ri);
|
|
return 0;
|
|
}
|
|
|
|
static struct file_operations kvm_rma_fops = {
|
|
.mmap = kvm_rma_mmap,
|
|
.release = kvm_rma_release,
|
|
};
|
|
|
|
long kvm_vm_ioctl_allocate_rma(struct kvm *kvm, struct kvm_allocate_rma *ret)
|
|
{
|
|
struct kvmppc_rma_info *ri;
|
|
long fd;
|
|
|
|
ri = kvm_alloc_rma();
|
|
if (!ri)
|
|
return -ENOMEM;
|
|
|
|
fd = anon_inode_getfd("kvm-rma", &kvm_rma_fops, ri, O_RDWR);
|
|
if (fd < 0)
|
|
kvm_release_rma(ri);
|
|
|
|
ret->rma_size = ri->npages << PAGE_SHIFT;
|
|
return fd;
|
|
}
|
|
|
|
static struct page *hva_to_page(unsigned long addr)
|
|
{
|
|
struct page *page[1];
|
|
int npages;
|
|
|
|
might_sleep();
|
|
|
|
npages = get_user_pages_fast(addr, 1, 1, page);
|
|
|
|
if (unlikely(npages != 1))
|
|
return 0;
|
|
|
|
return page[0];
|
|
}
|
|
|
|
int kvmppc_core_prepare_memory_region(struct kvm *kvm,
|
|
struct kvm_userspace_memory_region *mem)
|
|
{
|
|
unsigned long psize, porder;
|
|
unsigned long i, npages, totalpages;
|
|
unsigned long pg_ix;
|
|
struct kvmppc_pginfo *pginfo;
|
|
unsigned long hva;
|
|
struct kvmppc_rma_info *ri = NULL;
|
|
struct page *page;
|
|
|
|
/* For now, only allow 16MB pages */
|
|
porder = LARGE_PAGE_ORDER;
|
|
psize = 1ul << porder;
|
|
if ((mem->memory_size & (psize - 1)) ||
|
|
(mem->guest_phys_addr & (psize - 1))) {
|
|
pr_err("bad memory_size=%llx @ %llx\n",
|
|
mem->memory_size, mem->guest_phys_addr);
|
|
return -EINVAL;
|
|
}
|
|
|
|
npages = mem->memory_size >> porder;
|
|
totalpages = (mem->guest_phys_addr + mem->memory_size) >> porder;
|
|
|
|
/* More memory than we have space to track? */
|
|
if (totalpages > (1ul << (MAX_MEM_ORDER - LARGE_PAGE_ORDER)))
|
|
return -EINVAL;
|
|
|
|
/* Do we already have an RMA registered? */
|
|
if (mem->guest_phys_addr == 0 && kvm->arch.rma)
|
|
return -EINVAL;
|
|
|
|
if (totalpages > kvm->arch.ram_npages)
|
|
kvm->arch.ram_npages = totalpages;
|
|
|
|
/* Is this one of our preallocated RMAs? */
|
|
if (mem->guest_phys_addr == 0) {
|
|
struct vm_area_struct *vma;
|
|
|
|
down_read(¤t->mm->mmap_sem);
|
|
vma = find_vma(current->mm, mem->userspace_addr);
|
|
if (vma && vma->vm_file &&
|
|
vma->vm_file->f_op == &kvm_rma_fops &&
|
|
mem->userspace_addr == vma->vm_start)
|
|
ri = vma->vm_file->private_data;
|
|
up_read(¤t->mm->mmap_sem);
|
|
if (!ri && cpu_has_feature(CPU_FTR_ARCH_201)) {
|
|
pr_err("CPU requires an RMO\n");
|
|
return -EINVAL;
|
|
}
|
|
}
|
|
|
|
if (ri) {
|
|
unsigned long rma_size;
|
|
unsigned long lpcr;
|
|
long rmls;
|
|
|
|
rma_size = ri->npages << PAGE_SHIFT;
|
|
if (rma_size > mem->memory_size)
|
|
rma_size = mem->memory_size;
|
|
rmls = lpcr_rmls(rma_size);
|
|
if (rmls < 0) {
|
|
pr_err("Can't use RMA of 0x%lx bytes\n", rma_size);
|
|
return -EINVAL;
|
|
}
|
|
atomic_inc(&ri->use_count);
|
|
kvm->arch.rma = ri;
|
|
kvm->arch.n_rma_pages = rma_size >> porder;
|
|
|
|
/* Update LPCR and RMOR */
|
|
lpcr = kvm->arch.lpcr;
|
|
if (cpu_has_feature(CPU_FTR_ARCH_201)) {
|
|
/* PPC970; insert RMLS value (split field) in HID4 */
|
|
lpcr &= ~((1ul << HID4_RMLS0_SH) |
|
|
(3ul << HID4_RMLS2_SH));
|
|
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 &= ~(LPCR_VPM0 | LPCR_VRMA_L);
|
|
lpcr |= rmls << LPCR_RMLS_SH;
|
|
kvm->arch.rmor = kvm->arch.rma->base_pfn << PAGE_SHIFT;
|
|
}
|
|
kvm->arch.lpcr = lpcr;
|
|
pr_info("Using RMO at %lx size %lx (LPCR = %lx)\n",
|
|
ri->base_pfn << PAGE_SHIFT, rma_size, lpcr);
|
|
}
|
|
|
|
pg_ix = mem->guest_phys_addr >> porder;
|
|
pginfo = kvm->arch.ram_pginfo + pg_ix;
|
|
for (i = 0; i < npages; ++i, ++pg_ix) {
|
|
if (ri && pg_ix < kvm->arch.n_rma_pages) {
|
|
pginfo[i].pfn = ri->base_pfn +
|
|
(pg_ix << (porder - PAGE_SHIFT));
|
|
continue;
|
|
}
|
|
hva = mem->userspace_addr + (i << porder);
|
|
page = hva_to_page(hva);
|
|
if (!page) {
|
|
pr_err("oops, no pfn for hva %lx\n", hva);
|
|
goto err;
|
|
}
|
|
/* Check it's a 16MB page */
|
|
if (!PageHead(page) ||
|
|
compound_order(page) != (LARGE_PAGE_ORDER - PAGE_SHIFT)) {
|
|
pr_err("page at %lx isn't 16MB (o=%d)\n",
|
|
hva, compound_order(page));
|
|
goto err;
|
|
}
|
|
pginfo[i].pfn = page_to_pfn(page);
|
|
}
|
|
|
|
return 0;
|
|
|
|
err:
|
|
return -EINVAL;
|
|
}
|
|
|
|
void kvmppc_core_commit_memory_region(struct kvm *kvm,
|
|
struct kvm_userspace_memory_region *mem)
|
|
{
|
|
if (mem->guest_phys_addr == 0 && mem->memory_size != 0 &&
|
|
!kvm->arch.rma)
|
|
kvmppc_map_vrma(kvm, mem);
|
|
}
|
|
|
|
int kvmppc_core_init_vm(struct kvm *kvm)
|
|
{
|
|
long r;
|
|
unsigned long npages = 1ul << (MAX_MEM_ORDER - LARGE_PAGE_ORDER);
|
|
long err = -ENOMEM;
|
|
unsigned long lpcr;
|
|
|
|
/* Allocate hashed page table */
|
|
r = kvmppc_alloc_hpt(kvm);
|
|
if (r)
|
|
return r;
|
|
|
|
INIT_LIST_HEAD(&kvm->arch.spapr_tce_tables);
|
|
|
|
kvm->arch.ram_pginfo = kzalloc(npages * sizeof(struct kvmppc_pginfo),
|
|
GFP_KERNEL);
|
|
if (!kvm->arch.ram_pginfo) {
|
|
pr_err("kvmppc_core_init_vm: couldn't alloc %lu bytes\n",
|
|
npages * sizeof(struct kvmppc_pginfo));
|
|
goto out_free;
|
|
}
|
|
|
|
kvm->arch.ram_npages = 0;
|
|
kvm->arch.ram_psize = 1ul << LARGE_PAGE_ORDER;
|
|
kvm->arch.ram_porder = LARGE_PAGE_ORDER;
|
|
kvm->arch.rma = NULL;
|
|
kvm->arch.n_rma_pages = 0;
|
|
|
|
kvm->arch.host_sdr1 = mfspr(SPRN_SDR1);
|
|
|
|
if (cpu_has_feature(CPU_FTR_ARCH_201)) {
|
|
/* PPC970; HID4 is effectively the LPCR */
|
|
unsigned long lpid = kvm->arch.lpid;
|
|
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_VRMA_L;
|
|
}
|
|
kvm->arch.lpcr = lpcr;
|
|
|
|
return 0;
|
|
|
|
out_free:
|
|
kvmppc_free_hpt(kvm);
|
|
return err;
|
|
}
|
|
|
|
void kvmppc_core_destroy_vm(struct kvm *kvm)
|
|
{
|
|
struct kvmppc_pginfo *pginfo;
|
|
unsigned long i;
|
|
|
|
if (kvm->arch.ram_pginfo) {
|
|
pginfo = kvm->arch.ram_pginfo;
|
|
kvm->arch.ram_pginfo = NULL;
|
|
for (i = kvm->arch.n_rma_pages; i < kvm->arch.ram_npages; ++i)
|
|
if (pginfo[i].pfn)
|
|
put_page(pfn_to_page(pginfo[i].pfn));
|
|
kfree(pginfo);
|
|
}
|
|
if (kvm->arch.rma) {
|
|
kvm_release_rma(kvm->arch.rma);
|
|
kvm->arch.rma = NULL;
|
|
}
|
|
|
|
kvmppc_free_hpt(kvm);
|
|
WARN_ON(!list_empty(&kvm->arch.spapr_tce_tables));
|
|
}
|
|
|
|
/* These are stubs for now */
|
|
void kvmppc_mmu_pte_pflush(struct kvm_vcpu *vcpu, ulong pa_start, ulong pa_end)
|
|
{
|
|
}
|
|
|
|
/* We don't need to emulate any privileged instructions or dcbz */
|
|
int kvmppc_core_emulate_op(struct kvm_run *run, struct kvm_vcpu *vcpu,
|
|
unsigned int inst, int *advance)
|
|
{
|
|
return EMULATE_FAIL;
|
|
}
|
|
|
|
int kvmppc_core_emulate_mtspr(struct kvm_vcpu *vcpu, int sprn, int rs)
|
|
{
|
|
return EMULATE_FAIL;
|
|
}
|
|
|
|
int kvmppc_core_emulate_mfspr(struct kvm_vcpu *vcpu, int sprn, int rt)
|
|
{
|
|
return EMULATE_FAIL;
|
|
}
|
|
|
|
static int kvmppc_book3s_hv_init(void)
|
|
{
|
|
int r;
|
|
|
|
r = kvm_init(NULL, sizeof(struct kvm_vcpu), 0, THIS_MODULE);
|
|
|
|
if (r)
|
|
return r;
|
|
|
|
r = kvmppc_mmu_hv_init();
|
|
|
|
return r;
|
|
}
|
|
|
|
static void kvmppc_book3s_hv_exit(void)
|
|
{
|
|
kvm_exit();
|
|
}
|
|
|
|
module_init(kvmppc_book3s_hv_init);
|
|
module_exit(kvmppc_book3s_hv_exit);
|