| /* |
| * Copyright (C) 2010,2012 Freescale Semiconductor, Inc. All rights reserved. |
| * |
| * Author: Varun Sethi, <varun.sethi@freescale.com> |
| * |
| * Description: |
| * This file is derived from arch/powerpc/kvm/e500.c, |
| * by Yu Liu <yu.liu@freescale.com>. |
| * |
| * 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/slab.h> |
| #include <linux/err.h> |
| #include <linux/export.h> |
| #include <linux/miscdevice.h> |
| #include <linux/module.h> |
| |
| #include <asm/reg.h> |
| #include <asm/cputable.h> |
| #include <asm/tlbflush.h> |
| #include <asm/kvm_ppc.h> |
| #include <asm/dbell.h> |
| |
| #include "booke.h" |
| #include "e500.h" |
| |
| void kvmppc_set_pending_interrupt(struct kvm_vcpu *vcpu, enum int_class type) |
| { |
| enum ppc_dbell dbell_type; |
| unsigned long tag; |
| |
| switch (type) { |
| case INT_CLASS_NONCRIT: |
| dbell_type = PPC_G_DBELL; |
| break; |
| case INT_CLASS_CRIT: |
| dbell_type = PPC_G_DBELL_CRIT; |
| break; |
| case INT_CLASS_MC: |
| dbell_type = PPC_G_DBELL_MC; |
| break; |
| default: |
| WARN_ONCE(1, "%s: unknown int type %d\n", __func__, type); |
| return; |
| } |
| |
| preempt_disable(); |
| tag = PPC_DBELL_LPID(get_lpid(vcpu)) | vcpu->vcpu_id; |
| mb(); |
| ppc_msgsnd(dbell_type, 0, tag); |
| preempt_enable(); |
| } |
| |
| /* gtlbe must not be mapped by more than one host tlb entry */ |
| void kvmppc_e500_tlbil_one(struct kvmppc_vcpu_e500 *vcpu_e500, |
| struct kvm_book3e_206_tlb_entry *gtlbe) |
| { |
| unsigned int tid, ts; |
| gva_t eaddr; |
| u32 val; |
| unsigned long flags; |
| |
| ts = get_tlb_ts(gtlbe); |
| tid = get_tlb_tid(gtlbe); |
| |
| /* We search the host TLB to invalidate its shadow TLB entry */ |
| val = (tid << 16) | ts; |
| eaddr = get_tlb_eaddr(gtlbe); |
| |
| local_irq_save(flags); |
| |
| mtspr(SPRN_MAS6, val); |
| mtspr(SPRN_MAS5, MAS5_SGS | get_lpid(&vcpu_e500->vcpu)); |
| |
| asm volatile("tlbsx 0, %[eaddr]\n" : : [eaddr] "r" (eaddr)); |
| val = mfspr(SPRN_MAS1); |
| if (val & MAS1_VALID) { |
| mtspr(SPRN_MAS1, val & ~MAS1_VALID); |
| asm volatile("tlbwe"); |
| } |
| mtspr(SPRN_MAS5, 0); |
| /* NOTE: tlbsx also updates mas8, so clear it for host tlbwe */ |
| mtspr(SPRN_MAS8, 0); |
| isync(); |
| |
| local_irq_restore(flags); |
| } |
| |
| void kvmppc_e500_tlbil_all(struct kvmppc_vcpu_e500 *vcpu_e500) |
| { |
| unsigned long flags; |
| |
| local_irq_save(flags); |
| mtspr(SPRN_MAS5, MAS5_SGS | get_lpid(&vcpu_e500->vcpu)); |
| asm volatile("tlbilxlpid"); |
| mtspr(SPRN_MAS5, 0); |
| local_irq_restore(flags); |
| } |
| |
| void kvmppc_set_pid(struct kvm_vcpu *vcpu, u32 pid) |
| { |
| vcpu->arch.pid = pid; |
| } |
| |
| void kvmppc_mmu_msr_notify(struct kvm_vcpu *vcpu, u32 old_msr) |
| { |
| } |
| |
| /* We use two lpids per VM */ |
| static DEFINE_PER_CPU(struct kvm_vcpu *[KVMPPC_NR_LPIDS], last_vcpu_of_lpid); |
| |
| static void kvmppc_core_vcpu_load_e500mc(struct kvm_vcpu *vcpu, int cpu) |
| { |
| struct kvmppc_vcpu_e500 *vcpu_e500 = to_e500(vcpu); |
| |
| kvmppc_booke_vcpu_load(vcpu, cpu); |
| |
| mtspr(SPRN_LPID, get_lpid(vcpu)); |
| mtspr(SPRN_EPCR, vcpu->arch.shadow_epcr); |
| mtspr(SPRN_GPIR, vcpu->vcpu_id); |
| mtspr(SPRN_MSRP, vcpu->arch.shadow_msrp); |
| vcpu->arch.eplc = EPC_EGS | (get_lpid(vcpu) << EPC_ELPID_SHIFT); |
| vcpu->arch.epsc = vcpu->arch.eplc; |
| mtspr(SPRN_EPLC, vcpu->arch.eplc); |
| mtspr(SPRN_EPSC, vcpu->arch.epsc); |
| |
| mtspr(SPRN_GIVPR, vcpu->arch.ivpr); |
| mtspr(SPRN_GIVOR2, vcpu->arch.ivor[BOOKE_IRQPRIO_DATA_STORAGE]); |
| mtspr(SPRN_GIVOR8, vcpu->arch.ivor[BOOKE_IRQPRIO_SYSCALL]); |
| mtspr(SPRN_GSPRG0, (unsigned long)vcpu->arch.shared->sprg0); |
| mtspr(SPRN_GSPRG1, (unsigned long)vcpu->arch.shared->sprg1); |
| mtspr(SPRN_GSPRG2, (unsigned long)vcpu->arch.shared->sprg2); |
| mtspr(SPRN_GSPRG3, (unsigned long)vcpu->arch.shared->sprg3); |
| |
| mtspr(SPRN_GSRR0, vcpu->arch.shared->srr0); |
| mtspr(SPRN_GSRR1, vcpu->arch.shared->srr1); |
| |
| mtspr(SPRN_GEPR, vcpu->arch.epr); |
| mtspr(SPRN_GDEAR, vcpu->arch.shared->dar); |
| mtspr(SPRN_GESR, vcpu->arch.shared->esr); |
| |
| if (vcpu->arch.oldpir != mfspr(SPRN_PIR) || |
| __get_cpu_var(last_vcpu_of_lpid)[get_lpid(vcpu)] != vcpu) { |
| kvmppc_e500_tlbil_all(vcpu_e500); |
| __get_cpu_var(last_vcpu_of_lpid)[get_lpid(vcpu)] = vcpu; |
| } |
| } |
| |
| static void kvmppc_core_vcpu_put_e500mc(struct kvm_vcpu *vcpu) |
| { |
| vcpu->arch.eplc = mfspr(SPRN_EPLC); |
| vcpu->arch.epsc = mfspr(SPRN_EPSC); |
| |
| vcpu->arch.shared->sprg0 = mfspr(SPRN_GSPRG0); |
| vcpu->arch.shared->sprg1 = mfspr(SPRN_GSPRG1); |
| vcpu->arch.shared->sprg2 = mfspr(SPRN_GSPRG2); |
| vcpu->arch.shared->sprg3 = mfspr(SPRN_GSPRG3); |
| |
| vcpu->arch.shared->srr0 = mfspr(SPRN_GSRR0); |
| vcpu->arch.shared->srr1 = mfspr(SPRN_GSRR1); |
| |
| vcpu->arch.epr = mfspr(SPRN_GEPR); |
| vcpu->arch.shared->dar = mfspr(SPRN_GDEAR); |
| vcpu->arch.shared->esr = mfspr(SPRN_GESR); |
| |
| vcpu->arch.oldpir = mfspr(SPRN_PIR); |
| |
| kvmppc_booke_vcpu_put(vcpu); |
| } |
| |
| int kvmppc_core_check_processor_compat(void) |
| { |
| int r; |
| |
| if (strcmp(cur_cpu_spec->cpu_name, "e500mc") == 0) |
| r = 0; |
| else if (strcmp(cur_cpu_spec->cpu_name, "e5500") == 0) |
| r = 0; |
| #ifdef CONFIG_ALTIVEC |
| /* |
| * Since guests have the priviledge to enable AltiVec, we need AltiVec |
| * support in the host to save/restore their context. |
| * Don't use CPU_FTR_ALTIVEC to identify cores with AltiVec unit |
| * because it's cleared in the absence of CONFIG_ALTIVEC! |
| */ |
| else if (strcmp(cur_cpu_spec->cpu_name, "e6500") == 0) |
| r = 0; |
| #endif |
| else |
| r = -ENOTSUPP; |
| |
| return r; |
| } |
| |
| int kvmppc_core_vcpu_setup(struct kvm_vcpu *vcpu) |
| { |
| struct kvmppc_vcpu_e500 *vcpu_e500 = to_e500(vcpu); |
| |
| vcpu->arch.shadow_epcr = SPRN_EPCR_DSIGS | SPRN_EPCR_DGTMI | \ |
| SPRN_EPCR_DUVD; |
| #ifdef CONFIG_64BIT |
| vcpu->arch.shadow_epcr |= SPRN_EPCR_ICM; |
| #endif |
| vcpu->arch.shadow_msrp = MSRP_UCLEP | MSRP_PMMP; |
| |
| vcpu->arch.pvr = mfspr(SPRN_PVR); |
| vcpu_e500->svr = mfspr(SPRN_SVR); |
| |
| vcpu->arch.cpu_type = KVM_CPU_E500MC; |
| |
| return 0; |
| } |
| |
| static int kvmppc_core_get_sregs_e500mc(struct kvm_vcpu *vcpu, |
| struct kvm_sregs *sregs) |
| { |
| struct kvmppc_vcpu_e500 *vcpu_e500 = to_e500(vcpu); |
| |
| sregs->u.e.features |= KVM_SREGS_E_ARCH206_MMU | KVM_SREGS_E_PM | |
| KVM_SREGS_E_PC; |
| sregs->u.e.impl_id = KVM_SREGS_E_IMPL_FSL; |
| |
| sregs->u.e.impl.fsl.features = 0; |
| sregs->u.e.impl.fsl.svr = vcpu_e500->svr; |
| sregs->u.e.impl.fsl.hid0 = vcpu_e500->hid0; |
| sregs->u.e.impl.fsl.mcar = vcpu_e500->mcar; |
| |
| kvmppc_get_sregs_e500_tlb(vcpu, sregs); |
| |
| sregs->u.e.ivor_high[3] = |
| vcpu->arch.ivor[BOOKE_IRQPRIO_PERFORMANCE_MONITOR]; |
| sregs->u.e.ivor_high[4] = vcpu->arch.ivor[BOOKE_IRQPRIO_DBELL]; |
| sregs->u.e.ivor_high[5] = vcpu->arch.ivor[BOOKE_IRQPRIO_DBELL_CRIT]; |
| |
| return kvmppc_get_sregs_ivor(vcpu, sregs); |
| } |
| |
| static int kvmppc_core_set_sregs_e500mc(struct kvm_vcpu *vcpu, |
| struct kvm_sregs *sregs) |
| { |
| struct kvmppc_vcpu_e500 *vcpu_e500 = to_e500(vcpu); |
| int ret; |
| |
| if (sregs->u.e.impl_id == KVM_SREGS_E_IMPL_FSL) { |
| vcpu_e500->svr = sregs->u.e.impl.fsl.svr; |
| vcpu_e500->hid0 = sregs->u.e.impl.fsl.hid0; |
| vcpu_e500->mcar = sregs->u.e.impl.fsl.mcar; |
| } |
| |
| ret = kvmppc_set_sregs_e500_tlb(vcpu, sregs); |
| if (ret < 0) |
| return ret; |
| |
| if (!(sregs->u.e.features & KVM_SREGS_E_IVOR)) |
| return 0; |
| |
| if (sregs->u.e.features & KVM_SREGS_E_PM) { |
| vcpu->arch.ivor[BOOKE_IRQPRIO_PERFORMANCE_MONITOR] = |
| sregs->u.e.ivor_high[3]; |
| } |
| |
| if (sregs->u.e.features & KVM_SREGS_E_PC) { |
| vcpu->arch.ivor[BOOKE_IRQPRIO_DBELL] = |
| sregs->u.e.ivor_high[4]; |
| vcpu->arch.ivor[BOOKE_IRQPRIO_DBELL_CRIT] = |
| sregs->u.e.ivor_high[5]; |
| } |
| |
| return kvmppc_set_sregs_ivor(vcpu, sregs); |
| } |
| |
| static int kvmppc_get_one_reg_e500mc(struct kvm_vcpu *vcpu, u64 id, |
| union kvmppc_one_reg *val) |
| { |
| int r = 0; |
| |
| switch (id) { |
| case KVM_REG_PPC_SPRG9: |
| *val = get_reg_val(id, vcpu->arch.sprg9); |
| break; |
| default: |
| r = kvmppc_get_one_reg_e500_tlb(vcpu, id, val); |
| } |
| |
| return r; |
| } |
| |
| static int kvmppc_set_one_reg_e500mc(struct kvm_vcpu *vcpu, u64 id, |
| union kvmppc_one_reg *val) |
| { |
| int r = 0; |
| |
| switch (id) { |
| case KVM_REG_PPC_SPRG9: |
| vcpu->arch.sprg9 = set_reg_val(id, *val); |
| break; |
| default: |
| r = kvmppc_set_one_reg_e500_tlb(vcpu, id, val); |
| } |
| |
| return r; |
| } |
| |
| static struct kvm_vcpu *kvmppc_core_vcpu_create_e500mc(struct kvm *kvm, |
| unsigned int id) |
| { |
| struct kvmppc_vcpu_e500 *vcpu_e500; |
| struct kvm_vcpu *vcpu; |
| int err; |
| |
| vcpu_e500 = kmem_cache_zalloc(kvm_vcpu_cache, GFP_KERNEL); |
| if (!vcpu_e500) { |
| err = -ENOMEM; |
| goto out; |
| } |
| vcpu = &vcpu_e500->vcpu; |
| |
| /* Invalid PIR value -- this LPID dosn't have valid state on any cpu */ |
| vcpu->arch.oldpir = 0xffffffff; |
| |
| err = kvm_vcpu_init(vcpu, kvm, id); |
| if (err) |
| goto free_vcpu; |
| |
| err = kvmppc_e500_tlb_init(vcpu_e500); |
| if (err) |
| goto uninit_vcpu; |
| |
| vcpu->arch.shared = (void *)__get_free_page(GFP_KERNEL | __GFP_ZERO); |
| if (!vcpu->arch.shared) |
| goto uninit_tlb; |
| |
| return vcpu; |
| |
| uninit_tlb: |
| kvmppc_e500_tlb_uninit(vcpu_e500); |
| uninit_vcpu: |
| kvm_vcpu_uninit(vcpu); |
| |
| free_vcpu: |
| kmem_cache_free(kvm_vcpu_cache, vcpu_e500); |
| out: |
| return ERR_PTR(err); |
| } |
| |
| static void kvmppc_core_vcpu_free_e500mc(struct kvm_vcpu *vcpu) |
| { |
| struct kvmppc_vcpu_e500 *vcpu_e500 = to_e500(vcpu); |
| |
| free_page((unsigned long)vcpu->arch.shared); |
| kvmppc_e500_tlb_uninit(vcpu_e500); |
| kvm_vcpu_uninit(vcpu); |
| kmem_cache_free(kvm_vcpu_cache, vcpu_e500); |
| } |
| |
| static int kvmppc_core_init_vm_e500mc(struct kvm *kvm) |
| { |
| int lpid; |
| |
| lpid = kvmppc_alloc_lpid(); |
| if (lpid < 0) |
| return lpid; |
| |
| /* |
| * Use two lpids per VM on cores with two threads like e6500. Use |
| * even numbers to speedup vcpu lpid computation with consecutive lpids |
| * per VM. vm1 will use lpids 2 and 3, vm2 lpids 4 and 5, and so on. |
| */ |
| if (threads_per_core == 2) |
| lpid <<= 1; |
| |
| kvm->arch.lpid = lpid; |
| return 0; |
| } |
| |
| static void kvmppc_core_destroy_vm_e500mc(struct kvm *kvm) |
| { |
| int lpid = kvm->arch.lpid; |
| |
| if (threads_per_core == 2) |
| lpid >>= 1; |
| |
| kvmppc_free_lpid(lpid); |
| } |
| |
| static struct kvmppc_ops kvm_ops_e500mc = { |
| .get_sregs = kvmppc_core_get_sregs_e500mc, |
| .set_sregs = kvmppc_core_set_sregs_e500mc, |
| .get_one_reg = kvmppc_get_one_reg_e500mc, |
| .set_one_reg = kvmppc_set_one_reg_e500mc, |
| .vcpu_load = kvmppc_core_vcpu_load_e500mc, |
| .vcpu_put = kvmppc_core_vcpu_put_e500mc, |
| .vcpu_create = kvmppc_core_vcpu_create_e500mc, |
| .vcpu_free = kvmppc_core_vcpu_free_e500mc, |
| .mmu_destroy = kvmppc_mmu_destroy_e500, |
| .init_vm = kvmppc_core_init_vm_e500mc, |
| .destroy_vm = kvmppc_core_destroy_vm_e500mc, |
| .emulate_op = kvmppc_core_emulate_op_e500, |
| .emulate_mtspr = kvmppc_core_emulate_mtspr_e500, |
| .emulate_mfspr = kvmppc_core_emulate_mfspr_e500, |
| }; |
| |
| static int __init kvmppc_e500mc_init(void) |
| { |
| int r; |
| |
| r = kvmppc_booke_init(); |
| if (r) |
| goto err_out; |
| |
| /* |
| * Use two lpids per VM on dual threaded processors like e6500 |
| * to workarround the lack of tlb write conditional instruction. |
| * Expose half the number of available hardware lpids to the lpid |
| * allocator. |
| */ |
| kvmppc_init_lpid(KVMPPC_NR_LPIDS/threads_per_core); |
| kvmppc_claim_lpid(0); /* host */ |
| |
| r = kvm_init(NULL, sizeof(struct kvmppc_vcpu_e500), 0, THIS_MODULE); |
| if (r) |
| goto err_out; |
| kvm_ops_e500mc.owner = THIS_MODULE; |
| kvmppc_pr_ops = &kvm_ops_e500mc; |
| |
| err_out: |
| return r; |
| } |
| |
| static void __exit kvmppc_e500mc_exit(void) |
| { |
| kvmppc_pr_ops = NULL; |
| kvmppc_booke_exit(); |
| } |
| |
| module_init(kvmppc_e500mc_init); |
| module_exit(kvmppc_e500mc_exit); |
| MODULE_ALIAS_MISCDEV(KVM_MINOR); |
| MODULE_ALIAS("devname:kvm"); |