265 lines
6.3 KiB
C
265 lines
6.3 KiB
C
/*
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* Copyright (C) 2008-2011 Freescale Semiconductor, Inc. All rights reserved.
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*
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* Author: Yu Liu, <yu.liu@freescale.com>
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*
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* Description:
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* This file is derived from arch/powerpc/kvm/44x.c,
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* by Hollis Blanchard <hollisb@us.ibm.com>.
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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/slab.h>
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#include <linux/err.h>
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#include <linux/export.h>
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#include <asm/reg.h>
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#include <asm/cputable.h>
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#include <asm/tlbflush.h>
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#include <asm/kvm_e500.h>
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#include <asm/kvm_ppc.h>
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#include "booke.h"
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#include "e500_tlb.h"
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void kvmppc_core_load_host_debugstate(struct kvm_vcpu *vcpu)
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{
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}
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void kvmppc_core_load_guest_debugstate(struct kvm_vcpu *vcpu)
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{
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}
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void kvmppc_core_vcpu_load(struct kvm_vcpu *vcpu, int cpu)
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{
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kvmppc_e500_tlb_load(vcpu, cpu);
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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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kvmppc_e500_tlb_put(vcpu);
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#ifdef CONFIG_SPE
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if (vcpu->arch.shadow_msr & MSR_SPE)
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kvmppc_vcpu_disable_spe(vcpu);
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#endif
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}
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int kvmppc_core_check_processor_compat(void)
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{
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int r;
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if (strcmp(cur_cpu_spec->cpu_name, "e500v2") == 0)
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r = 0;
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else
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r = -ENOTSUPP;
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return r;
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}
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int kvmppc_core_vcpu_setup(struct kvm_vcpu *vcpu)
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{
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struct kvmppc_vcpu_e500 *vcpu_e500 = to_e500(vcpu);
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kvmppc_e500_tlb_setup(vcpu_e500);
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/* Registers init */
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vcpu->arch.pvr = mfspr(SPRN_PVR);
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vcpu_e500->svr = mfspr(SPRN_SVR);
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vcpu->arch.cpu_type = KVM_CPU_E500V2;
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return 0;
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}
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/* 'linear_address' is actually an encoding of AS|PID|EADDR . */
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int kvmppc_core_vcpu_translate(struct kvm_vcpu *vcpu,
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struct kvm_translation *tr)
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{
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int index;
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gva_t eaddr;
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u8 pid;
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u8 as;
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eaddr = tr->linear_address;
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pid = (tr->linear_address >> 32) & 0xff;
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as = (tr->linear_address >> 40) & 0x1;
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index = kvmppc_e500_tlb_search(vcpu, eaddr, pid, as);
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if (index < 0) {
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tr->valid = 0;
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return 0;
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}
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tr->physical_address = kvmppc_mmu_xlate(vcpu, index, eaddr);
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/* XXX what does "writeable" and "usermode" even mean? */
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tr->valid = 1;
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return 0;
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}
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void kvmppc_core_get_sregs(struct kvm_vcpu *vcpu, struct kvm_sregs *sregs)
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{
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struct kvmppc_vcpu_e500 *vcpu_e500 = to_e500(vcpu);
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sregs->u.e.features |= KVM_SREGS_E_ARCH206_MMU | KVM_SREGS_E_SPE |
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KVM_SREGS_E_PM;
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sregs->u.e.impl_id = KVM_SREGS_E_IMPL_FSL;
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sregs->u.e.impl.fsl.features = 0;
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sregs->u.e.impl.fsl.svr = vcpu_e500->svr;
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sregs->u.e.impl.fsl.hid0 = vcpu_e500->hid0;
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sregs->u.e.impl.fsl.mcar = vcpu_e500->mcar;
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sregs->u.e.mas0 = vcpu->arch.shared->mas0;
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sregs->u.e.mas1 = vcpu->arch.shared->mas1;
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sregs->u.e.mas2 = vcpu->arch.shared->mas2;
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sregs->u.e.mas7_3 = vcpu->arch.shared->mas7_3;
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sregs->u.e.mas4 = vcpu->arch.shared->mas4;
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sregs->u.e.mas6 = vcpu->arch.shared->mas6;
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sregs->u.e.mmucfg = mfspr(SPRN_MMUCFG);
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sregs->u.e.tlbcfg[0] = vcpu_e500->tlb0cfg;
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sregs->u.e.tlbcfg[1] = vcpu_e500->tlb1cfg;
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sregs->u.e.tlbcfg[2] = 0;
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sregs->u.e.tlbcfg[3] = 0;
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sregs->u.e.ivor_high[0] = vcpu->arch.ivor[BOOKE_IRQPRIO_SPE_UNAVAIL];
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sregs->u.e.ivor_high[1] = vcpu->arch.ivor[BOOKE_IRQPRIO_SPE_FP_DATA];
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sregs->u.e.ivor_high[2] = vcpu->arch.ivor[BOOKE_IRQPRIO_SPE_FP_ROUND];
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sregs->u.e.ivor_high[3] =
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vcpu->arch.ivor[BOOKE_IRQPRIO_PERFORMANCE_MONITOR];
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kvmppc_get_sregs_ivor(vcpu, sregs);
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}
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int kvmppc_core_set_sregs(struct kvm_vcpu *vcpu, struct kvm_sregs *sregs)
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{
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struct kvmppc_vcpu_e500 *vcpu_e500 = to_e500(vcpu);
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if (sregs->u.e.impl_id == KVM_SREGS_E_IMPL_FSL) {
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vcpu_e500->svr = sregs->u.e.impl.fsl.svr;
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vcpu_e500->hid0 = sregs->u.e.impl.fsl.hid0;
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vcpu_e500->mcar = sregs->u.e.impl.fsl.mcar;
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}
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if (sregs->u.e.features & KVM_SREGS_E_ARCH206_MMU) {
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vcpu->arch.shared->mas0 = sregs->u.e.mas0;
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vcpu->arch.shared->mas1 = sregs->u.e.mas1;
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vcpu->arch.shared->mas2 = sregs->u.e.mas2;
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vcpu->arch.shared->mas7_3 = sregs->u.e.mas7_3;
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vcpu->arch.shared->mas4 = sregs->u.e.mas4;
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vcpu->arch.shared->mas6 = sregs->u.e.mas6;
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}
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if (!(sregs->u.e.features & KVM_SREGS_E_IVOR))
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return 0;
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if (sregs->u.e.features & KVM_SREGS_E_SPE) {
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vcpu->arch.ivor[BOOKE_IRQPRIO_SPE_UNAVAIL] =
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sregs->u.e.ivor_high[0];
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vcpu->arch.ivor[BOOKE_IRQPRIO_SPE_FP_DATA] =
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sregs->u.e.ivor_high[1];
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vcpu->arch.ivor[BOOKE_IRQPRIO_SPE_FP_ROUND] =
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sregs->u.e.ivor_high[2];
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}
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if (sregs->u.e.features & KVM_SREGS_E_PM) {
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vcpu->arch.ivor[BOOKE_IRQPRIO_PERFORMANCE_MONITOR] =
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sregs->u.e.ivor_high[3];
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}
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return kvmppc_set_sregs_ivor(vcpu, sregs);
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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 kvmppc_vcpu_e500 *vcpu_e500;
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struct kvm_vcpu *vcpu;
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int err;
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vcpu_e500 = kmem_cache_zalloc(kvm_vcpu_cache, GFP_KERNEL);
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if (!vcpu_e500) {
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err = -ENOMEM;
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goto out;
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}
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vcpu = &vcpu_e500->vcpu;
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err = kvm_vcpu_init(vcpu, kvm, id);
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if (err)
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goto free_vcpu;
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err = kvmppc_e500_tlb_init(vcpu_e500);
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if (err)
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goto uninit_vcpu;
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vcpu->arch.shared = (void*)__get_free_page(GFP_KERNEL|__GFP_ZERO);
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if (!vcpu->arch.shared)
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goto uninit_tlb;
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return vcpu;
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uninit_tlb:
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kvmppc_e500_tlb_uninit(vcpu_e500);
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uninit_vcpu:
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kvm_vcpu_uninit(vcpu);
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free_vcpu:
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kmem_cache_free(kvm_vcpu_cache, vcpu_e500);
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out:
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return ERR_PTR(err);
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}
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void kvmppc_core_vcpu_free(struct kvm_vcpu *vcpu)
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{
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struct kvmppc_vcpu_e500 *vcpu_e500 = to_e500(vcpu);
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free_page((unsigned long)vcpu->arch.shared);
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kvm_vcpu_uninit(vcpu);
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kvmppc_e500_tlb_uninit(vcpu_e500);
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kmem_cache_free(kvm_vcpu_cache, vcpu_e500);
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}
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static int __init kvmppc_e500_init(void)
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{
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int r, i;
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unsigned long ivor[3];
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unsigned long max_ivor = 0;
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r = kvmppc_core_check_processor_compat();
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if (r)
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return r;
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r = kvmppc_booke_init();
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if (r)
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return r;
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/* copy extra E500 exception handlers */
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ivor[0] = mfspr(SPRN_IVOR32);
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ivor[1] = mfspr(SPRN_IVOR33);
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ivor[2] = mfspr(SPRN_IVOR34);
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for (i = 0; i < 3; i++) {
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if (ivor[i] > max_ivor)
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max_ivor = ivor[i];
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memcpy((void *)kvmppc_booke_handlers + ivor[i],
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kvmppc_handlers_start + (i + 16) * kvmppc_handler_len,
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kvmppc_handler_len);
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}
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flush_icache_range(kvmppc_booke_handlers,
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kvmppc_booke_handlers + max_ivor + kvmppc_handler_len);
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return kvm_init(NULL, sizeof(struct kvmppc_vcpu_e500), 0, THIS_MODULE);
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}
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static void __exit kvmppc_e500_exit(void)
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{
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kvmppc_booke_exit();
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}
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module_init(kvmppc_e500_init);
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module_exit(kvmppc_e500_exit);
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