| /* |
| * Copyright (C) 2009. SUSE Linux Products GmbH. All rights reserved. |
| * |
| * Authors: |
| * Alexander Graf <agraf@suse.de> |
| * Kevin Wolf <mail@kevin-wolf.de> |
| * |
| * Description: |
| * This file is derived from arch/powerpc/kvm/44x.c, |
| * by Hollis Blanchard <hollisb@us.ibm.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/err.h> |
| #include <linux/slab.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 <linux/gfp.h> |
| #include <linux/sched.h> |
| #include <linux/vmalloc.h> |
| #include <linux/highmem.h> |
| |
| #define VCPU_STAT(x) offsetof(struct kvm_vcpu, stat.x), KVM_STAT_VCPU |
| |
| /* #define EXIT_DEBUG */ |
| /* #define EXIT_DEBUG_SIMPLE */ |
| /* #define DEBUG_EXT */ |
| |
| static int kvmppc_handle_ext(struct kvm_vcpu *vcpu, unsigned int exit_nr, |
| ulong msr); |
| |
| /* Some compatibility defines */ |
| #ifdef CONFIG_PPC_BOOK3S_32 |
| #define MSR_USER32 MSR_USER |
| #define MSR_USER64 MSR_USER |
| #define HW_PAGE_SIZE PAGE_SIZE |
| #endif |
| |
| struct kvm_stats_debugfs_item debugfs_entries[] = { |
| { "exits", VCPU_STAT(sum_exits) }, |
| { "mmio", VCPU_STAT(mmio_exits) }, |
| { "sig", VCPU_STAT(signal_exits) }, |
| { "sysc", VCPU_STAT(syscall_exits) }, |
| { "inst_emu", VCPU_STAT(emulated_inst_exits) }, |
| { "dec", VCPU_STAT(dec_exits) }, |
| { "ext_intr", VCPU_STAT(ext_intr_exits) }, |
| { "queue_intr", VCPU_STAT(queue_intr) }, |
| { "halt_wakeup", VCPU_STAT(halt_wakeup) }, |
| { "pf_storage", VCPU_STAT(pf_storage) }, |
| { "sp_storage", VCPU_STAT(sp_storage) }, |
| { "pf_instruc", VCPU_STAT(pf_instruc) }, |
| { "sp_instruc", VCPU_STAT(sp_instruc) }, |
| { "ld", VCPU_STAT(ld) }, |
| { "ld_slow", VCPU_STAT(ld_slow) }, |
| { "st", VCPU_STAT(st) }, |
| { "st_slow", VCPU_STAT(st_slow) }, |
| { NULL } |
| }; |
| |
| void kvmppc_core_load_host_debugstate(struct kvm_vcpu *vcpu) |
| { |
| } |
| |
| void kvmppc_core_load_guest_debugstate(struct kvm_vcpu *vcpu) |
| { |
| } |
| |
| void kvmppc_core_vcpu_load(struct kvm_vcpu *vcpu, int cpu) |
| { |
| #ifdef CONFIG_PPC_BOOK3S_64 |
| memcpy(to_svcpu(vcpu)->slb, to_book3s(vcpu)->slb_shadow, sizeof(to_svcpu(vcpu)->slb)); |
| memcpy(&get_paca()->shadow_vcpu, to_book3s(vcpu)->shadow_vcpu, |
| sizeof(get_paca()->shadow_vcpu)); |
| to_svcpu(vcpu)->slb_max = to_book3s(vcpu)->slb_shadow_max; |
| #endif |
| |
| #ifdef CONFIG_PPC_BOOK3S_32 |
| current->thread.kvm_shadow_vcpu = to_book3s(vcpu)->shadow_vcpu; |
| #endif |
| } |
| |
| void kvmppc_core_vcpu_put(struct kvm_vcpu *vcpu) |
| { |
| #ifdef CONFIG_PPC_BOOK3S_64 |
| memcpy(to_book3s(vcpu)->slb_shadow, to_svcpu(vcpu)->slb, sizeof(to_svcpu(vcpu)->slb)); |
| memcpy(to_book3s(vcpu)->shadow_vcpu, &get_paca()->shadow_vcpu, |
| sizeof(get_paca()->shadow_vcpu)); |
| to_book3s(vcpu)->slb_shadow_max = to_svcpu(vcpu)->slb_max; |
| #endif |
| |
| kvmppc_giveup_ext(vcpu, MSR_FP); |
| kvmppc_giveup_ext(vcpu, MSR_VEC); |
| kvmppc_giveup_ext(vcpu, MSR_VSX); |
| } |
| |
| #if defined(EXIT_DEBUG) |
| static u32 kvmppc_get_dec(struct kvm_vcpu *vcpu) |
| { |
| u64 jd = mftb() - vcpu->arch.dec_jiffies; |
| return vcpu->arch.dec - jd; |
| } |
| #endif |
| |
| static void kvmppc_recalc_shadow_msr(struct kvm_vcpu *vcpu) |
| { |
| ulong smsr = vcpu->arch.shared->msr; |
| |
| /* Guest MSR values */ |
| smsr &= MSR_FE0 | MSR_FE1 | MSR_SF | MSR_SE | MSR_BE | MSR_DE; |
| /* Process MSR values */ |
| smsr |= MSR_ME | MSR_RI | MSR_IR | MSR_DR | MSR_PR | MSR_EE; |
| /* External providers the guest reserved */ |
| smsr |= (vcpu->arch.shared->msr & vcpu->arch.guest_owned_ext); |
| /* 64-bit Process MSR values */ |
| #ifdef CONFIG_PPC_BOOK3S_64 |
| smsr |= MSR_ISF | MSR_HV; |
| #endif |
| vcpu->arch.shadow_msr = smsr; |
| } |
| |
| void kvmppc_set_msr(struct kvm_vcpu *vcpu, u64 msr) |
| { |
| ulong old_msr = vcpu->arch.shared->msr; |
| |
| #ifdef EXIT_DEBUG |
| printk(KERN_INFO "KVM: Set MSR to 0x%llx\n", msr); |
| #endif |
| |
| msr &= to_book3s(vcpu)->msr_mask; |
| vcpu->arch.shared->msr = msr; |
| kvmppc_recalc_shadow_msr(vcpu); |
| |
| if (msr & (MSR_WE|MSR_POW)) { |
| if (!vcpu->arch.pending_exceptions) { |
| kvm_vcpu_block(vcpu); |
| vcpu->stat.halt_wakeup++; |
| } |
| } |
| |
| if ((vcpu->arch.shared->msr & (MSR_PR|MSR_IR|MSR_DR)) != |
| (old_msr & (MSR_PR|MSR_IR|MSR_DR))) { |
| kvmppc_mmu_flush_segments(vcpu); |
| kvmppc_mmu_map_segment(vcpu, kvmppc_get_pc(vcpu)); |
| } |
| |
| /* Preload FPU if it's enabled */ |
| if (vcpu->arch.shared->msr & MSR_FP) |
| kvmppc_handle_ext(vcpu, BOOK3S_INTERRUPT_FP_UNAVAIL, MSR_FP); |
| } |
| |
| void kvmppc_inject_interrupt(struct kvm_vcpu *vcpu, int vec, u64 flags) |
| { |
| vcpu->arch.shared->srr0 = kvmppc_get_pc(vcpu); |
| vcpu->arch.shared->srr1 = vcpu->arch.shared->msr | flags; |
| kvmppc_set_pc(vcpu, to_book3s(vcpu)->hior + vec); |
| vcpu->arch.mmu.reset_msr(vcpu); |
| } |
| |
| static int kvmppc_book3s_vec2irqprio(unsigned int vec) |
| { |
| unsigned int prio; |
| |
| switch (vec) { |
| case 0x100: prio = BOOK3S_IRQPRIO_SYSTEM_RESET; break; |
| case 0x200: prio = BOOK3S_IRQPRIO_MACHINE_CHECK; break; |
| case 0x300: prio = BOOK3S_IRQPRIO_DATA_STORAGE; break; |
| case 0x380: prio = BOOK3S_IRQPRIO_DATA_SEGMENT; break; |
| case 0x400: prio = BOOK3S_IRQPRIO_INST_STORAGE; break; |
| case 0x480: prio = BOOK3S_IRQPRIO_INST_SEGMENT; break; |
| case 0x500: prio = BOOK3S_IRQPRIO_EXTERNAL; break; |
| case 0x600: prio = BOOK3S_IRQPRIO_ALIGNMENT; break; |
| case 0x700: prio = BOOK3S_IRQPRIO_PROGRAM; break; |
| case 0x800: prio = BOOK3S_IRQPRIO_FP_UNAVAIL; break; |
| case 0x900: prio = BOOK3S_IRQPRIO_DECREMENTER; break; |
| case 0xc00: prio = BOOK3S_IRQPRIO_SYSCALL; break; |
| case 0xd00: prio = BOOK3S_IRQPRIO_DEBUG; break; |
| case 0xf20: prio = BOOK3S_IRQPRIO_ALTIVEC; break; |
| case 0xf40: prio = BOOK3S_IRQPRIO_VSX; break; |
| default: prio = BOOK3S_IRQPRIO_MAX; break; |
| } |
| |
| return prio; |
| } |
| |
| static void kvmppc_book3s_dequeue_irqprio(struct kvm_vcpu *vcpu, |
| unsigned int vec) |
| { |
| clear_bit(kvmppc_book3s_vec2irqprio(vec), |
| &vcpu->arch.pending_exceptions); |
| } |
| |
| void kvmppc_book3s_queue_irqprio(struct kvm_vcpu *vcpu, unsigned int vec) |
| { |
| vcpu->stat.queue_intr++; |
| |
| set_bit(kvmppc_book3s_vec2irqprio(vec), |
| &vcpu->arch.pending_exceptions); |
| #ifdef EXIT_DEBUG |
| printk(KERN_INFO "Queueing interrupt %x\n", vec); |
| #endif |
| } |
| |
| |
| void kvmppc_core_queue_program(struct kvm_vcpu *vcpu, ulong flags) |
| { |
| to_book3s(vcpu)->prog_flags = flags; |
| kvmppc_book3s_queue_irqprio(vcpu, BOOK3S_INTERRUPT_PROGRAM); |
| } |
| |
| void kvmppc_core_queue_dec(struct kvm_vcpu *vcpu) |
| { |
| kvmppc_book3s_queue_irqprio(vcpu, BOOK3S_INTERRUPT_DECREMENTER); |
| } |
| |
| int kvmppc_core_pending_dec(struct kvm_vcpu *vcpu) |
| { |
| return test_bit(BOOK3S_INTERRUPT_DECREMENTER >> 7, &vcpu->arch.pending_exceptions); |
| } |
| |
| void kvmppc_core_dequeue_dec(struct kvm_vcpu *vcpu) |
| { |
| kvmppc_book3s_dequeue_irqprio(vcpu, BOOK3S_INTERRUPT_DECREMENTER); |
| } |
| |
| void kvmppc_core_queue_external(struct kvm_vcpu *vcpu, |
| struct kvm_interrupt *irq) |
| { |
| kvmppc_book3s_queue_irqprio(vcpu, BOOK3S_INTERRUPT_EXTERNAL); |
| } |
| |
| void kvmppc_core_dequeue_external(struct kvm_vcpu *vcpu, |
| struct kvm_interrupt *irq) |
| { |
| kvmppc_book3s_dequeue_irqprio(vcpu, BOOK3S_INTERRUPT_EXTERNAL); |
| } |
| |
| int kvmppc_book3s_irqprio_deliver(struct kvm_vcpu *vcpu, unsigned int priority) |
| { |
| int deliver = 1; |
| int vec = 0; |
| ulong flags = 0ULL; |
| ulong crit_raw = vcpu->arch.shared->critical; |
| ulong crit_r1 = kvmppc_get_gpr(vcpu, 1); |
| bool crit; |
| |
| /* Truncate crit indicators in 32 bit mode */ |
| if (!(vcpu->arch.shared->msr & MSR_SF)) { |
| crit_raw &= 0xffffffff; |
| crit_r1 &= 0xffffffff; |
| } |
| |
| /* Critical section when crit == r1 */ |
| crit = (crit_raw == crit_r1); |
| /* ... and we're in supervisor mode */ |
| crit = crit && !(vcpu->arch.shared->msr & MSR_PR); |
| |
| switch (priority) { |
| case BOOK3S_IRQPRIO_DECREMENTER: |
| deliver = (vcpu->arch.shared->msr & MSR_EE) && !crit; |
| vec = BOOK3S_INTERRUPT_DECREMENTER; |
| break; |
| case BOOK3S_IRQPRIO_EXTERNAL: |
| deliver = (vcpu->arch.shared->msr & MSR_EE) && !crit; |
| vec = BOOK3S_INTERRUPT_EXTERNAL; |
| break; |
| case BOOK3S_IRQPRIO_SYSTEM_RESET: |
| vec = BOOK3S_INTERRUPT_SYSTEM_RESET; |
| break; |
| case BOOK3S_IRQPRIO_MACHINE_CHECK: |
| vec = BOOK3S_INTERRUPT_MACHINE_CHECK; |
| break; |
| case BOOK3S_IRQPRIO_DATA_STORAGE: |
| vec = BOOK3S_INTERRUPT_DATA_STORAGE; |
| break; |
| case BOOK3S_IRQPRIO_INST_STORAGE: |
| vec = BOOK3S_INTERRUPT_INST_STORAGE; |
| break; |
| case BOOK3S_IRQPRIO_DATA_SEGMENT: |
| vec = BOOK3S_INTERRUPT_DATA_SEGMENT; |
| break; |
| case BOOK3S_IRQPRIO_INST_SEGMENT: |
| vec = BOOK3S_INTERRUPT_INST_SEGMENT; |
| break; |
| case BOOK3S_IRQPRIO_ALIGNMENT: |
| vec = BOOK3S_INTERRUPT_ALIGNMENT; |
| break; |
| case BOOK3S_IRQPRIO_PROGRAM: |
| vec = BOOK3S_INTERRUPT_PROGRAM; |
| flags = to_book3s(vcpu)->prog_flags; |
| break; |
| case BOOK3S_IRQPRIO_VSX: |
| vec = BOOK3S_INTERRUPT_VSX; |
| break; |
| case BOOK3S_IRQPRIO_ALTIVEC: |
| vec = BOOK3S_INTERRUPT_ALTIVEC; |
| break; |
| case BOOK3S_IRQPRIO_FP_UNAVAIL: |
| vec = BOOK3S_INTERRUPT_FP_UNAVAIL; |
| break; |
| case BOOK3S_IRQPRIO_SYSCALL: |
| vec = BOOK3S_INTERRUPT_SYSCALL; |
| break; |
| case BOOK3S_IRQPRIO_DEBUG: |
| vec = BOOK3S_INTERRUPT_TRACE; |
| break; |
| case BOOK3S_IRQPRIO_PERFORMANCE_MONITOR: |
| vec = BOOK3S_INTERRUPT_PERFMON; |
| break; |
| default: |
| deliver = 0; |
| printk(KERN_ERR "KVM: Unknown interrupt: 0x%x\n", priority); |
| break; |
| } |
| |
| #if 0 |
| printk(KERN_INFO "Deliver interrupt 0x%x? %x\n", vec, deliver); |
| #endif |
| |
| if (deliver) |
| kvmppc_inject_interrupt(vcpu, vec, flags); |
| |
| return deliver; |
| } |
| |
| void kvmppc_core_deliver_interrupts(struct kvm_vcpu *vcpu) |
| { |
| unsigned long *pending = &vcpu->arch.pending_exceptions; |
| unsigned long old_pending = vcpu->arch.pending_exceptions; |
| unsigned int priority; |
| |
| #ifdef EXIT_DEBUG |
| if (vcpu->arch.pending_exceptions) |
| printk(KERN_EMERG "KVM: Check pending: %lx\n", vcpu->arch.pending_exceptions); |
| #endif |
| priority = __ffs(*pending); |
| while (priority < BOOK3S_IRQPRIO_MAX) { |
| if (kvmppc_book3s_irqprio_deliver(vcpu, priority) && |
| (priority != BOOK3S_IRQPRIO_DECREMENTER)) { |
| /* DEC interrupts get cleared by mtdec */ |
| clear_bit(priority, &vcpu->arch.pending_exceptions); |
| break; |
| } |
| |
| priority = find_next_bit(pending, |
| BITS_PER_BYTE * sizeof(*pending), |
| priority + 1); |
| } |
| |
| /* Tell the guest about our interrupt status */ |
| if (*pending) |
| vcpu->arch.shared->int_pending = 1; |
| else if (old_pending) |
| vcpu->arch.shared->int_pending = 0; |
| } |
| |
| void kvmppc_set_pvr(struct kvm_vcpu *vcpu, u32 pvr) |
| { |
| u32 host_pvr; |
| |
| vcpu->arch.hflags &= ~BOOK3S_HFLAG_SLB; |
| vcpu->arch.pvr = pvr; |
| #ifdef CONFIG_PPC_BOOK3S_64 |
| if ((pvr >= 0x330000) && (pvr < 0x70330000)) { |
| kvmppc_mmu_book3s_64_init(vcpu); |
| to_book3s(vcpu)->hior = 0xfff00000; |
| to_book3s(vcpu)->msr_mask = 0xffffffffffffffffULL; |
| } else |
| #endif |
| { |
| kvmppc_mmu_book3s_32_init(vcpu); |
| to_book3s(vcpu)->hior = 0; |
| to_book3s(vcpu)->msr_mask = 0xffffffffULL; |
| } |
| |
| /* If we are in hypervisor level on 970, we can tell the CPU to |
| * treat DCBZ as 32 bytes store */ |
| vcpu->arch.hflags &= ~BOOK3S_HFLAG_DCBZ32; |
| if (vcpu->arch.mmu.is_dcbz32(vcpu) && (mfmsr() & MSR_HV) && |
| !strcmp(cur_cpu_spec->platform, "ppc970")) |
| vcpu->arch.hflags |= BOOK3S_HFLAG_DCBZ32; |
| |
| /* Cell performs badly if MSR_FEx are set. So let's hope nobody |
| really needs them in a VM on Cell and force disable them. */ |
| if (!strcmp(cur_cpu_spec->platform, "ppc-cell-be")) |
| to_book3s(vcpu)->msr_mask &= ~(MSR_FE0 | MSR_FE1); |
| |
| #ifdef CONFIG_PPC_BOOK3S_32 |
| /* 32 bit Book3S always has 32 byte dcbz */ |
| vcpu->arch.hflags |= BOOK3S_HFLAG_DCBZ32; |
| #endif |
| |
| /* On some CPUs we can execute paired single operations natively */ |
| asm ( "mfpvr %0" : "=r"(host_pvr)); |
| switch (host_pvr) { |
| case 0x00080200: /* lonestar 2.0 */ |
| case 0x00088202: /* lonestar 2.2 */ |
| case 0x70000100: /* gekko 1.0 */ |
| case 0x00080100: /* gekko 2.0 */ |
| case 0x00083203: /* gekko 2.3a */ |
| case 0x00083213: /* gekko 2.3b */ |
| case 0x00083204: /* gekko 2.4 */ |
| case 0x00083214: /* gekko 2.4e (8SE) - retail HW2 */ |
| case 0x00087200: /* broadway */ |
| vcpu->arch.hflags |= BOOK3S_HFLAG_NATIVE_PS; |
| /* Enable HID2.PSE - in case we need it later */ |
| mtspr(SPRN_HID2_GEKKO, mfspr(SPRN_HID2_GEKKO) | (1 << 29)); |
| } |
| } |
| |
| /* Book3s_32 CPUs always have 32 bytes cache line size, which Linux assumes. To |
| * make Book3s_32 Linux work on Book3s_64, we have to make sure we trap dcbz to |
| * emulate 32 bytes dcbz length. |
| * |
| * The Book3s_64 inventors also realized this case and implemented a special bit |
| * in the HID5 register, which is a hypervisor ressource. Thus we can't use it. |
| * |
| * My approach here is to patch the dcbz instruction on executing pages. |
| */ |
| static void kvmppc_patch_dcbz(struct kvm_vcpu *vcpu, struct kvmppc_pte *pte) |
| { |
| struct page *hpage; |
| u64 hpage_offset; |
| u32 *page; |
| int i; |
| |
| hpage = gfn_to_page(vcpu->kvm, pte->raddr >> PAGE_SHIFT); |
| if (is_error_page(hpage)) |
| return; |
| |
| hpage_offset = pte->raddr & ~PAGE_MASK; |
| hpage_offset &= ~0xFFFULL; |
| hpage_offset /= 4; |
| |
| get_page(hpage); |
| page = kmap_atomic(hpage, KM_USER0); |
| |
| /* patch dcbz into reserved instruction, so we trap */ |
| for (i=hpage_offset; i < hpage_offset + (HW_PAGE_SIZE / 4); i++) |
| if ((page[i] & 0xff0007ff) == INS_DCBZ) |
| page[i] &= 0xfffffff7; |
| |
| kunmap_atomic(page, KM_USER0); |
| put_page(hpage); |
| } |
| |
| static int kvmppc_xlate(struct kvm_vcpu *vcpu, ulong eaddr, bool data, |
| struct kvmppc_pte *pte) |
| { |
| int relocated = (vcpu->arch.shared->msr & (data ? MSR_DR : MSR_IR)); |
| int r; |
| |
| if (relocated) { |
| r = vcpu->arch.mmu.xlate(vcpu, eaddr, pte, data); |
| } else { |
| pte->eaddr = eaddr; |
| pte->raddr = eaddr & KVM_PAM; |
| pte->vpage = VSID_REAL | eaddr >> 12; |
| pte->may_read = true; |
| pte->may_write = true; |
| pte->may_execute = true; |
| r = 0; |
| } |
| |
| return r; |
| } |
| |
| static hva_t kvmppc_bad_hva(void) |
| { |
| return PAGE_OFFSET; |
| } |
| |
| static hva_t kvmppc_pte_to_hva(struct kvm_vcpu *vcpu, struct kvmppc_pte *pte, |
| bool read) |
| { |
| hva_t hpage; |
| |
| if (read && !pte->may_read) |
| goto err; |
| |
| if (!read && !pte->may_write) |
| goto err; |
| |
| hpage = gfn_to_hva(vcpu->kvm, pte->raddr >> PAGE_SHIFT); |
| if (kvm_is_error_hva(hpage)) |
| goto err; |
| |
| return hpage | (pte->raddr & ~PAGE_MASK); |
| err: |
| return kvmppc_bad_hva(); |
| } |
| |
| int kvmppc_st(struct kvm_vcpu *vcpu, ulong *eaddr, int size, void *ptr, |
| bool data) |
| { |
| struct kvmppc_pte pte; |
| |
| vcpu->stat.st++; |
| |
| if (kvmppc_xlate(vcpu, *eaddr, data, &pte)) |
| return -ENOENT; |
| |
| *eaddr = pte.raddr; |
| |
| if (!pte.may_write) |
| return -EPERM; |
| |
| if (kvm_write_guest(vcpu->kvm, pte.raddr, ptr, size)) |
| return EMULATE_DO_MMIO; |
| |
| return EMULATE_DONE; |
| } |
| |
| int kvmppc_ld(struct kvm_vcpu *vcpu, ulong *eaddr, int size, void *ptr, |
| bool data) |
| { |
| struct kvmppc_pte pte; |
| hva_t hva = *eaddr; |
| |
| vcpu->stat.ld++; |
| |
| if (kvmppc_xlate(vcpu, *eaddr, data, &pte)) |
| goto nopte; |
| |
| *eaddr = pte.raddr; |
| |
| hva = kvmppc_pte_to_hva(vcpu, &pte, true); |
| if (kvm_is_error_hva(hva)) |
| goto mmio; |
| |
| if (copy_from_user(ptr, (void __user *)hva, size)) { |
| printk(KERN_INFO "kvmppc_ld at 0x%lx failed\n", hva); |
| goto mmio; |
| } |
| |
| return EMULATE_DONE; |
| |
| nopte: |
| return -ENOENT; |
| mmio: |
| return EMULATE_DO_MMIO; |
| } |
| |
| static int kvmppc_visible_gfn(struct kvm_vcpu *vcpu, gfn_t gfn) |
| { |
| return kvm_is_visible_gfn(vcpu->kvm, gfn); |
| } |
| |
| int kvmppc_handle_pagefault(struct kvm_run *run, struct kvm_vcpu *vcpu, |
| ulong eaddr, int vec) |
| { |
| bool data = (vec == BOOK3S_INTERRUPT_DATA_STORAGE); |
| int r = RESUME_GUEST; |
| int relocated; |
| int page_found = 0; |
| struct kvmppc_pte pte; |
| bool is_mmio = false; |
| bool dr = (vcpu->arch.shared->msr & MSR_DR) ? true : false; |
| bool ir = (vcpu->arch.shared->msr & MSR_IR) ? true : false; |
| u64 vsid; |
| |
| relocated = data ? dr : ir; |
| |
| /* Resolve real address if translation turned on */ |
| if (relocated) { |
| page_found = vcpu->arch.mmu.xlate(vcpu, eaddr, &pte, data); |
| } else { |
| pte.may_execute = true; |
| pte.may_read = true; |
| pte.may_write = true; |
| pte.raddr = eaddr & KVM_PAM; |
| pte.eaddr = eaddr; |
| pte.vpage = eaddr >> 12; |
| } |
| |
| switch (vcpu->arch.shared->msr & (MSR_DR|MSR_IR)) { |
| case 0: |
| pte.vpage |= ((u64)VSID_REAL << (SID_SHIFT - 12)); |
| break; |
| case MSR_DR: |
| case MSR_IR: |
| vcpu->arch.mmu.esid_to_vsid(vcpu, eaddr >> SID_SHIFT, &vsid); |
| |
| if ((vcpu->arch.shared->msr & (MSR_DR|MSR_IR)) == MSR_DR) |
| pte.vpage |= ((u64)VSID_REAL_DR << (SID_SHIFT - 12)); |
| else |
| pte.vpage |= ((u64)VSID_REAL_IR << (SID_SHIFT - 12)); |
| pte.vpage |= vsid; |
| |
| if (vsid == -1) |
| page_found = -EINVAL; |
| break; |
| } |
| |
| if (vcpu->arch.mmu.is_dcbz32(vcpu) && |
| (!(vcpu->arch.hflags & BOOK3S_HFLAG_DCBZ32))) { |
| /* |
| * If we do the dcbz hack, we have to NX on every execution, |
| * so we can patch the executing code. This renders our guest |
| * NX-less. |
| */ |
| pte.may_execute = !data; |
| } |
| |
| if (page_found == -ENOENT) { |
| /* Page not found in guest PTE entries */ |
| vcpu->arch.shared->dar = kvmppc_get_fault_dar(vcpu); |
| vcpu->arch.shared->dsisr = to_svcpu(vcpu)->fault_dsisr; |
| vcpu->arch.shared->msr |= |
| (to_svcpu(vcpu)->shadow_srr1 & 0x00000000f8000000ULL); |
| kvmppc_book3s_queue_irqprio(vcpu, vec); |
| } else if (page_found == -EPERM) { |
| /* Storage protection */ |
| vcpu->arch.shared->dar = kvmppc_get_fault_dar(vcpu); |
| vcpu->arch.shared->dsisr = |
| to_svcpu(vcpu)->fault_dsisr & ~DSISR_NOHPTE; |
| vcpu->arch.shared->dsisr |= DSISR_PROTFAULT; |
| vcpu->arch.shared->msr |= |
| (to_svcpu(vcpu)->shadow_srr1 & 0x00000000f8000000ULL); |
| kvmppc_book3s_queue_irqprio(vcpu, vec); |
| } else if (page_found == -EINVAL) { |
| /* Page not found in guest SLB */ |
| vcpu->arch.shared->dar = kvmppc_get_fault_dar(vcpu); |
| kvmppc_book3s_queue_irqprio(vcpu, vec + 0x80); |
| } else if (!is_mmio && |
| kvmppc_visible_gfn(vcpu, pte.raddr >> PAGE_SHIFT)) { |
| /* The guest's PTE is not mapped yet. Map on the host */ |
| kvmppc_mmu_map_page(vcpu, &pte); |
| if (data) |
| vcpu->stat.sp_storage++; |
| else if (vcpu->arch.mmu.is_dcbz32(vcpu) && |
| (!(vcpu->arch.hflags & BOOK3S_HFLAG_DCBZ32))) |
| kvmppc_patch_dcbz(vcpu, &pte); |
| } else { |
| /* MMIO */ |
| vcpu->stat.mmio_exits++; |
| vcpu->arch.paddr_accessed = pte.raddr; |
| r = kvmppc_emulate_mmio(run, vcpu); |
| if ( r == RESUME_HOST_NV ) |
| r = RESUME_HOST; |
| } |
| |
| return r; |
| } |
| |
| static inline int get_fpr_index(int i) |
| { |
| #ifdef CONFIG_VSX |
| i *= 2; |
| #endif |
| return i; |
| } |
| |
| /* Give up external provider (FPU, Altivec, VSX) */ |
| void kvmppc_giveup_ext(struct kvm_vcpu *vcpu, ulong msr) |
| { |
| struct thread_struct *t = ¤t->thread; |
| u64 *vcpu_fpr = vcpu->arch.fpr; |
| #ifdef CONFIG_VSX |
| u64 *vcpu_vsx = vcpu->arch.vsr; |
| #endif |
| u64 *thread_fpr = (u64*)t->fpr; |
| int i; |
| |
| if (!(vcpu->arch.guest_owned_ext & msr)) |
| return; |
| |
| #ifdef DEBUG_EXT |
| printk(KERN_INFO "Giving up ext 0x%lx\n", msr); |
| #endif |
| |
| switch (msr) { |
| case MSR_FP: |
| giveup_fpu(current); |
| for (i = 0; i < ARRAY_SIZE(vcpu->arch.fpr); i++) |
| vcpu_fpr[i] = thread_fpr[get_fpr_index(i)]; |
| |
| vcpu->arch.fpscr = t->fpscr.val; |
| break; |
| case MSR_VEC: |
| #ifdef CONFIG_ALTIVEC |
| giveup_altivec(current); |
| memcpy(vcpu->arch.vr, t->vr, sizeof(vcpu->arch.vr)); |
| vcpu->arch.vscr = t->vscr; |
| #endif |
| break; |
| case MSR_VSX: |
| #ifdef CONFIG_VSX |
| __giveup_vsx(current); |
| for (i = 0; i < ARRAY_SIZE(vcpu->arch.vsr); i++) |
| vcpu_vsx[i] = thread_fpr[get_fpr_index(i) + 1]; |
| #endif |
| break; |
| default: |
| BUG(); |
| } |
| |
| vcpu->arch.guest_owned_ext &= ~msr; |
| current->thread.regs->msr &= ~msr; |
| kvmppc_recalc_shadow_msr(vcpu); |
| } |
| |
| static int kvmppc_read_inst(struct kvm_vcpu *vcpu) |
| { |
| ulong srr0 = kvmppc_get_pc(vcpu); |
| u32 last_inst = kvmppc_get_last_inst(vcpu); |
| int ret; |
| |
| ret = kvmppc_ld(vcpu, &srr0, sizeof(u32), &last_inst, false); |
| if (ret == -ENOENT) { |
| ulong msr = vcpu->arch.shared->msr; |
| |
| msr = kvmppc_set_field(msr, 33, 33, 1); |
| msr = kvmppc_set_field(msr, 34, 36, 0); |
| vcpu->arch.shared->msr = kvmppc_set_field(msr, 42, 47, 0); |
| kvmppc_book3s_queue_irqprio(vcpu, BOOK3S_INTERRUPT_INST_STORAGE); |
| return EMULATE_AGAIN; |
| } |
| |
| return EMULATE_DONE; |
| } |
| |
| static int kvmppc_check_ext(struct kvm_vcpu *vcpu, unsigned int exit_nr) |
| { |
| |
| /* Need to do paired single emulation? */ |
| if (!(vcpu->arch.hflags & BOOK3S_HFLAG_PAIRED_SINGLE)) |
| return EMULATE_DONE; |
| |
| /* Read out the instruction */ |
| if (kvmppc_read_inst(vcpu) == EMULATE_DONE) |
| /* Need to emulate */ |
| return EMULATE_FAIL; |
| |
| return EMULATE_AGAIN; |
| } |
| |
| /* Handle external providers (FPU, Altivec, VSX) */ |
| static int kvmppc_handle_ext(struct kvm_vcpu *vcpu, unsigned int exit_nr, |
| ulong msr) |
| { |
| struct thread_struct *t = ¤t->thread; |
| u64 *vcpu_fpr = vcpu->arch.fpr; |
| #ifdef CONFIG_VSX |
| u64 *vcpu_vsx = vcpu->arch.vsr; |
| #endif |
| u64 *thread_fpr = (u64*)t->fpr; |
| int i; |
| |
| /* When we have paired singles, we emulate in software */ |
| if (vcpu->arch.hflags & BOOK3S_HFLAG_PAIRED_SINGLE) |
| return RESUME_GUEST; |
| |
| if (!(vcpu->arch.shared->msr & msr)) { |
| kvmppc_book3s_queue_irqprio(vcpu, exit_nr); |
| return RESUME_GUEST; |
| } |
| |
| /* We already own the ext */ |
| if (vcpu->arch.guest_owned_ext & msr) { |
| return RESUME_GUEST; |
| } |
| |
| #ifdef DEBUG_EXT |
| printk(KERN_INFO "Loading up ext 0x%lx\n", msr); |
| #endif |
| |
| current->thread.regs->msr |= msr; |
| |
| switch (msr) { |
| case MSR_FP: |
| for (i = 0; i < ARRAY_SIZE(vcpu->arch.fpr); i++) |
| thread_fpr[get_fpr_index(i)] = vcpu_fpr[i]; |
| |
| t->fpscr.val = vcpu->arch.fpscr; |
| t->fpexc_mode = 0; |
| kvmppc_load_up_fpu(); |
| break; |
| case MSR_VEC: |
| #ifdef CONFIG_ALTIVEC |
| memcpy(t->vr, vcpu->arch.vr, sizeof(vcpu->arch.vr)); |
| t->vscr = vcpu->arch.vscr; |
| t->vrsave = -1; |
| kvmppc_load_up_altivec(); |
| #endif |
| break; |
| case MSR_VSX: |
| #ifdef CONFIG_VSX |
| for (i = 0; i < ARRAY_SIZE(vcpu->arch.vsr); i++) |
| thread_fpr[get_fpr_index(i) + 1] = vcpu_vsx[i]; |
| kvmppc_load_up_vsx(); |
| #endif |
| break; |
| default: |
| BUG(); |
| } |
| |
| vcpu->arch.guest_owned_ext |= msr; |
| |
| kvmppc_recalc_shadow_msr(vcpu); |
| |
| return RESUME_GUEST; |
| } |
| |
| int kvmppc_handle_exit(struct kvm_run *run, struct kvm_vcpu *vcpu, |
| unsigned int exit_nr) |
| { |
| int r = RESUME_HOST; |
| |
| vcpu->stat.sum_exits++; |
| |
| run->exit_reason = KVM_EXIT_UNKNOWN; |
| run->ready_for_interrupt_injection = 1; |
| #ifdef EXIT_DEBUG |
| printk(KERN_EMERG "exit_nr=0x%x | pc=0x%lx | dar=0x%lx | dec=0x%x | msr=0x%lx\n", |
| exit_nr, kvmppc_get_pc(vcpu), kvmppc_get_fault_dar(vcpu), |
| kvmppc_get_dec(vcpu), to_svcpu(vcpu)->shadow_srr1); |
| #elif defined (EXIT_DEBUG_SIMPLE) |
| if ((exit_nr != 0x900) && (exit_nr != 0x500)) |
| printk(KERN_EMERG "exit_nr=0x%x | pc=0x%lx | dar=0x%lx | msr=0x%lx\n", |
| exit_nr, kvmppc_get_pc(vcpu), kvmppc_get_fault_dar(vcpu), |
| vcpu->arch.shared->msr); |
| #endif |
| kvm_resched(vcpu); |
| switch (exit_nr) { |
| case BOOK3S_INTERRUPT_INST_STORAGE: |
| vcpu->stat.pf_instruc++; |
| |
| #ifdef CONFIG_PPC_BOOK3S_32 |
| /* We set segments as unused segments when invalidating them. So |
| * treat the respective fault as segment fault. */ |
| if (to_svcpu(vcpu)->sr[kvmppc_get_pc(vcpu) >> SID_SHIFT] |
| == SR_INVALID) { |
| kvmppc_mmu_map_segment(vcpu, kvmppc_get_pc(vcpu)); |
| r = RESUME_GUEST; |
| break; |
| } |
| #endif |
| |
| /* only care about PTEG not found errors, but leave NX alone */ |
| if (to_svcpu(vcpu)->shadow_srr1 & 0x40000000) { |
| r = kvmppc_handle_pagefault(run, vcpu, kvmppc_get_pc(vcpu), exit_nr); |
| vcpu->stat.sp_instruc++; |
| } else if (vcpu->arch.mmu.is_dcbz32(vcpu) && |
| (!(vcpu->arch.hflags & BOOK3S_HFLAG_DCBZ32))) { |
| /* |
| * XXX If we do the dcbz hack we use the NX bit to flush&patch the page, |
| * so we can't use the NX bit inside the guest. Let's cross our fingers, |
| * that no guest that needs the dcbz hack does NX. |
| */ |
| kvmppc_mmu_pte_flush(vcpu, kvmppc_get_pc(vcpu), ~0xFFFUL); |
| r = RESUME_GUEST; |
| } else { |
| vcpu->arch.shared->msr |= |
| to_svcpu(vcpu)->shadow_srr1 & 0x58000000; |
| kvmppc_book3s_queue_irqprio(vcpu, exit_nr); |
| kvmppc_mmu_pte_flush(vcpu, kvmppc_get_pc(vcpu), ~0xFFFUL); |
| r = RESUME_GUEST; |
| } |
| break; |
| case BOOK3S_INTERRUPT_DATA_STORAGE: |
| { |
| ulong dar = kvmppc_get_fault_dar(vcpu); |
| vcpu->stat.pf_storage++; |
| |
| #ifdef CONFIG_PPC_BOOK3S_32 |
| /* We set segments as unused segments when invalidating them. So |
| * treat the respective fault as segment fault. */ |
| if ((to_svcpu(vcpu)->sr[dar >> SID_SHIFT]) == SR_INVALID) { |
| kvmppc_mmu_map_segment(vcpu, dar); |
| r = RESUME_GUEST; |
| break; |
| } |
| #endif |
| |
| /* The only case we need to handle is missing shadow PTEs */ |
| if (to_svcpu(vcpu)->fault_dsisr & DSISR_NOHPTE) { |
| r = kvmppc_handle_pagefault(run, vcpu, dar, exit_nr); |
| } else { |
| vcpu->arch.shared->dar = dar; |
| vcpu->arch.shared->dsisr = to_svcpu(vcpu)->fault_dsisr; |
| kvmppc_book3s_queue_irqprio(vcpu, exit_nr); |
| kvmppc_mmu_pte_flush(vcpu, dar, ~0xFFFUL); |
| r = RESUME_GUEST; |
| } |
| break; |
| } |
| case BOOK3S_INTERRUPT_DATA_SEGMENT: |
| if (kvmppc_mmu_map_segment(vcpu, kvmppc_get_fault_dar(vcpu)) < 0) { |
| vcpu->arch.shared->dar = kvmppc_get_fault_dar(vcpu); |
| kvmppc_book3s_queue_irqprio(vcpu, |
| BOOK3S_INTERRUPT_DATA_SEGMENT); |
| } |
| r = RESUME_GUEST; |
| break; |
| case BOOK3S_INTERRUPT_INST_SEGMENT: |
| if (kvmppc_mmu_map_segment(vcpu, kvmppc_get_pc(vcpu)) < 0) { |
| kvmppc_book3s_queue_irqprio(vcpu, |
| BOOK3S_INTERRUPT_INST_SEGMENT); |
| } |
| r = RESUME_GUEST; |
| break; |
| /* We're good on these - the host merely wanted to get our attention */ |
| case BOOK3S_INTERRUPT_DECREMENTER: |
| vcpu->stat.dec_exits++; |
| r = RESUME_GUEST; |
| break; |
| case BOOK3S_INTERRUPT_EXTERNAL: |
| vcpu->stat.ext_intr_exits++; |
| r = RESUME_GUEST; |
| break; |
| case BOOK3S_INTERRUPT_PERFMON: |
| r = RESUME_GUEST; |
| break; |
| case BOOK3S_INTERRUPT_PROGRAM: |
| { |
| enum emulation_result er; |
| ulong flags; |
| |
| program_interrupt: |
| flags = to_svcpu(vcpu)->shadow_srr1 & 0x1f0000ull; |
| |
| if (vcpu->arch.shared->msr & MSR_PR) { |
| #ifdef EXIT_DEBUG |
| printk(KERN_INFO "Userspace triggered 0x700 exception at 0x%lx (0x%x)\n", kvmppc_get_pc(vcpu), kvmppc_get_last_inst(vcpu)); |
| #endif |
| if ((kvmppc_get_last_inst(vcpu) & 0xff0007ff) != |
| (INS_DCBZ & 0xfffffff7)) { |
| kvmppc_core_queue_program(vcpu, flags); |
| r = RESUME_GUEST; |
| break; |
| } |
| } |
| |
| vcpu->stat.emulated_inst_exits++; |
| er = kvmppc_emulate_instruction(run, vcpu); |
| switch (er) { |
| case EMULATE_DONE: |
| r = RESUME_GUEST_NV; |
| break; |
| case EMULATE_AGAIN: |
| r = RESUME_GUEST; |
| break; |
| case EMULATE_FAIL: |
| printk(KERN_CRIT "%s: emulation at %lx failed (%08x)\n", |
| __func__, kvmppc_get_pc(vcpu), kvmppc_get_last_inst(vcpu)); |
| kvmppc_core_queue_program(vcpu, flags); |
| r = RESUME_GUEST; |
| break; |
| case EMULATE_DO_MMIO: |
| run->exit_reason = KVM_EXIT_MMIO; |
| r = RESUME_HOST_NV; |
| break; |
| default: |
| BUG(); |
| } |
| break; |
| } |
| case BOOK3S_INTERRUPT_SYSCALL: |
| if (vcpu->arch.osi_enabled && |
| (((u32)kvmppc_get_gpr(vcpu, 3)) == OSI_SC_MAGIC_R3) && |
| (((u32)kvmppc_get_gpr(vcpu, 4)) == OSI_SC_MAGIC_R4)) { |
| /* MOL hypercalls */ |
| u64 *gprs = run->osi.gprs; |
| int i; |
| |
| run->exit_reason = KVM_EXIT_OSI; |
| for (i = 0; i < 32; i++) |
| gprs[i] = kvmppc_get_gpr(vcpu, i); |
| vcpu->arch.osi_needed = 1; |
| r = RESUME_HOST_NV; |
| } else if (!(vcpu->arch.shared->msr & MSR_PR) && |
| (((u32)kvmppc_get_gpr(vcpu, 0)) == KVM_SC_MAGIC_R0)) { |
| /* KVM PV hypercalls */ |
| kvmppc_set_gpr(vcpu, 3, kvmppc_kvm_pv(vcpu)); |
| r = RESUME_GUEST; |
| } else { |
| /* Guest syscalls */ |
| vcpu->stat.syscall_exits++; |
| kvmppc_book3s_queue_irqprio(vcpu, exit_nr); |
| r = RESUME_GUEST; |
| } |
| break; |
| case BOOK3S_INTERRUPT_FP_UNAVAIL: |
| case BOOK3S_INTERRUPT_ALTIVEC: |
| case BOOK3S_INTERRUPT_VSX: |
| { |
| int ext_msr = 0; |
| |
| switch (exit_nr) { |
| case BOOK3S_INTERRUPT_FP_UNAVAIL: ext_msr = MSR_FP; break; |
| case BOOK3S_INTERRUPT_ALTIVEC: ext_msr = MSR_VEC; break; |
| case BOOK3S_INTERRUPT_VSX: ext_msr = MSR_VSX; break; |
| } |
| |
| switch (kvmppc_check_ext(vcpu, exit_nr)) { |
| case EMULATE_DONE: |
| /* everything ok - let's enable the ext */ |
| r = kvmppc_handle_ext(vcpu, exit_nr, ext_msr); |
| break; |
| case EMULATE_FAIL: |
| /* we need to emulate this instruction */ |
| goto program_interrupt; |
| break; |
| default: |
| /* nothing to worry about - go again */ |
| break; |
| } |
| break; |
| } |
| case BOOK3S_INTERRUPT_ALIGNMENT: |
| if (kvmppc_read_inst(vcpu) == EMULATE_DONE) { |
| vcpu->arch.shared->dsisr = kvmppc_alignment_dsisr(vcpu, |
| kvmppc_get_last_inst(vcpu)); |
| vcpu->arch.shared->dar = kvmppc_alignment_dar(vcpu, |
| kvmppc_get_last_inst(vcpu)); |
| kvmppc_book3s_queue_irqprio(vcpu, exit_nr); |
| } |
| r = RESUME_GUEST; |
| break; |
| case BOOK3S_INTERRUPT_MACHINE_CHECK: |
| case BOOK3S_INTERRUPT_TRACE: |
| kvmppc_book3s_queue_irqprio(vcpu, exit_nr); |
| r = RESUME_GUEST; |
| break; |
| default: |
| /* Ugh - bork here! What did we get? */ |
| printk(KERN_EMERG "exit_nr=0x%x | pc=0x%lx | msr=0x%lx\n", |
| exit_nr, kvmppc_get_pc(vcpu), to_svcpu(vcpu)->shadow_srr1); |
| r = RESUME_HOST; |
| BUG(); |
| break; |
| } |
| |
| |
| if (!(r & RESUME_HOST)) { |
| /* To avoid clobbering exit_reason, only check for signals if |
| * we aren't already exiting to userspace for some other |
| * reason. */ |
| if (signal_pending(current)) { |
| #ifdef EXIT_DEBUG |
| printk(KERN_EMERG "KVM: Going back to host\n"); |
| #endif |
| vcpu->stat.signal_exits++; |
| run->exit_reason = KVM_EXIT_INTR; |
| r = -EINTR; |
| } else { |
| /* In case an interrupt came in that was triggered |
| * from userspace (like DEC), we need to check what |
| * to inject now! */ |
| kvmppc_core_deliver_interrupts(vcpu); |
| } |
| } |
| |
| #ifdef EXIT_DEBUG |
| printk(KERN_EMERG "KVM exit: vcpu=0x%p pc=0x%lx r=0x%x\n", vcpu, kvmppc_get_pc(vcpu), r); |
| #endif |
| |
| return r; |
| } |
| |
| int kvm_arch_vcpu_setup(struct kvm_vcpu *vcpu) |
| { |
| return 0; |
| } |
| |
| int kvm_arch_vcpu_ioctl_get_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs) |
| { |
| int i; |
| |
| regs->pc = kvmppc_get_pc(vcpu); |
| regs->cr = kvmppc_get_cr(vcpu); |
| regs->ctr = kvmppc_get_ctr(vcpu); |
| regs->lr = kvmppc_get_lr(vcpu); |
| regs->xer = kvmppc_get_xer(vcpu); |
| regs->msr = vcpu->arch.shared->msr; |
| regs->srr0 = vcpu->arch.shared->srr0; |
| regs->srr1 = vcpu->arch.shared->srr1; |
| regs->pid = vcpu->arch.pid; |
| regs->sprg0 = vcpu->arch.shared->sprg0; |
| regs->sprg1 = vcpu->arch.shared->sprg1; |
| regs->sprg2 = vcpu->arch.shared->sprg2; |
| regs->sprg3 = vcpu->arch.shared->sprg3; |
| regs->sprg5 = vcpu->arch.sprg4; |
| regs->sprg6 = vcpu->arch.sprg5; |
| regs->sprg7 = vcpu->arch.sprg6; |
| |
| for (i = 0; i < ARRAY_SIZE(regs->gpr); i++) |
| regs->gpr[i] = kvmppc_get_gpr(vcpu, i); |
| |
| return 0; |
| } |
| |
| int kvm_arch_vcpu_ioctl_set_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs) |
| { |
| int i; |
| |
| kvmppc_set_pc(vcpu, regs->pc); |
| kvmppc_set_cr(vcpu, regs->cr); |
| kvmppc_set_ctr(vcpu, regs->ctr); |
| kvmppc_set_lr(vcpu, regs->lr); |
| kvmppc_set_xer(vcpu, regs->xer); |
| kvmppc_set_msr(vcpu, regs->msr); |
| vcpu->arch.shared->srr0 = regs->srr0; |
| vcpu->arch.shared->srr1 = regs->srr1; |
| vcpu->arch.shared->sprg0 = regs->sprg0; |
| vcpu->arch.shared->sprg1 = regs->sprg1; |
| vcpu->arch.shared->sprg2 = regs->sprg2; |
| vcpu->arch.shared->sprg3 = regs->sprg3; |
| vcpu->arch.sprg5 = regs->sprg4; |
| vcpu->arch.sprg6 = regs->sprg5; |
| vcpu->arch.sprg7 = regs->sprg6; |
| |
| for (i = 0; i < ARRAY_SIZE(regs->gpr); i++) |
| kvmppc_set_gpr(vcpu, i, regs->gpr[i]); |
| |
| return 0; |
| } |
| |
| int kvm_arch_vcpu_ioctl_get_sregs(struct kvm_vcpu *vcpu, |
| struct kvm_sregs *sregs) |
| { |
| struct kvmppc_vcpu_book3s *vcpu3s = to_book3s(vcpu); |
| int i; |
| |
| sregs->pvr = vcpu->arch.pvr; |
| |
| sregs->u.s.sdr1 = to_book3s(vcpu)->sdr1; |
| if (vcpu->arch.hflags & BOOK3S_HFLAG_SLB) { |
| for (i = 0; i < 64; i++) { |
| sregs->u.s.ppc64.slb[i].slbe = vcpu3s->slb[i].orige | i; |
| sregs->u.s.ppc64.slb[i].slbv = vcpu3s->slb[i].origv; |
| } |
| } else { |
| for (i = 0; i < 16; i++) { |
| sregs->u.s.ppc32.sr[i] = vcpu3s->sr[i].raw; |
| sregs->u.s.ppc32.sr[i] = vcpu3s->sr[i].raw; |
| } |
| for (i = 0; i < 8; i++) { |
| sregs->u.s.ppc32.ibat[i] = vcpu3s->ibat[i].raw; |
| sregs->u.s.ppc32.dbat[i] = vcpu3s->dbat[i].raw; |
| } |
| } |
| |
| return 0; |
| } |
| |
| int kvm_arch_vcpu_ioctl_set_sregs(struct kvm_vcpu *vcpu, |
| struct kvm_sregs *sregs) |
| { |
| struct kvmppc_vcpu_book3s *vcpu3s = to_book3s(vcpu); |
| int i; |
| |
| kvmppc_set_pvr(vcpu, sregs->pvr); |
| |
| vcpu3s->sdr1 = sregs->u.s.sdr1; |
| if (vcpu->arch.hflags & BOOK3S_HFLAG_SLB) { |
| for (i = 0; i < 64; i++) { |
| vcpu->arch.mmu.slbmte(vcpu, sregs->u.s.ppc64.slb[i].slbv, |
| sregs->u.s.ppc64.slb[i].slbe); |
| } |
| } else { |
| for (i = 0; i < 16; i++) { |
| vcpu->arch.mmu.mtsrin(vcpu, i, sregs->u.s.ppc32.sr[i]); |
| } |
| for (i = 0; i < 8; i++) { |
| kvmppc_set_bat(vcpu, &(vcpu3s->ibat[i]), false, |
| (u32)sregs->u.s.ppc32.ibat[i]); |
| kvmppc_set_bat(vcpu, &(vcpu3s->ibat[i]), true, |
| (u32)(sregs->u.s.ppc32.ibat[i] >> 32)); |
| kvmppc_set_bat(vcpu, &(vcpu3s->dbat[i]), false, |
| (u32)sregs->u.s.ppc32.dbat[i]); |
| kvmppc_set_bat(vcpu, &(vcpu3s->dbat[i]), true, |
| (u32)(sregs->u.s.ppc32.dbat[i] >> 32)); |
| } |
| } |
| |
| /* Flush the MMU after messing with the segments */ |
| kvmppc_mmu_pte_flush(vcpu, 0, 0); |
| |
| return 0; |
| } |
| |
| int kvm_arch_vcpu_ioctl_get_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu) |
| { |
| return -ENOTSUPP; |
| } |
| |
| int kvm_arch_vcpu_ioctl_set_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu) |
| { |
| return -ENOTSUPP; |
| } |
| |
| int kvm_arch_vcpu_ioctl_translate(struct kvm_vcpu *vcpu, |
| struct kvm_translation *tr) |
| { |
| return 0; |
| } |
| |
| /* |
| * Get (and clear) the dirty memory log for a memory slot. |
| */ |
| int kvm_vm_ioctl_get_dirty_log(struct kvm *kvm, |
| struct kvm_dirty_log *log) |
| { |
| struct kvm_memory_slot *memslot; |
| struct kvm_vcpu *vcpu; |
| ulong ga, ga_end; |
| int is_dirty = 0; |
| int r; |
| unsigned long n; |
| |
| mutex_lock(&kvm->slots_lock); |
| |
| r = kvm_get_dirty_log(kvm, log, &is_dirty); |
| if (r) |
| goto out; |
| |
| /* If nothing is dirty, don't bother messing with page tables. */ |
| if (is_dirty) { |
| memslot = &kvm->memslots->memslots[log->slot]; |
| |
| ga = memslot->base_gfn << PAGE_SHIFT; |
| ga_end = ga + (memslot->npages << PAGE_SHIFT); |
| |
| kvm_for_each_vcpu(n, vcpu, kvm) |
| kvmppc_mmu_pte_pflush(vcpu, ga, ga_end); |
| |
| n = kvm_dirty_bitmap_bytes(memslot); |
| memset(memslot->dirty_bitmap, 0, n); |
| } |
| |
| r = 0; |
| out: |
| mutex_unlock(&kvm->slots_lock); |
| return r; |
| } |
| |
| int kvmppc_core_check_processor_compat(void) |
| { |
| return 0; |
| } |
| |
| struct kvm_vcpu *kvmppc_core_vcpu_create(struct kvm *kvm, unsigned int id) |
| { |
| struct kvmppc_vcpu_book3s *vcpu_book3s; |
| struct kvm_vcpu *vcpu; |
| int err = -ENOMEM; |
| |
| vcpu_book3s = vmalloc(sizeof(struct kvmppc_vcpu_book3s)); |
| if (!vcpu_book3s) |
| goto out; |
| |
| memset(vcpu_book3s, 0, sizeof(struct kvmppc_vcpu_book3s)); |
| |
| vcpu_book3s->shadow_vcpu = (struct kvmppc_book3s_shadow_vcpu *) |
| kzalloc(sizeof(*vcpu_book3s->shadow_vcpu), GFP_KERNEL); |
| if (!vcpu_book3s->shadow_vcpu) |
| goto free_vcpu; |
| |
| vcpu = &vcpu_book3s->vcpu; |
| err = kvm_vcpu_init(vcpu, kvm, id); |
| if (err) |
| goto free_shadow_vcpu; |
| |
| vcpu->arch.shared = (void*)__get_free_page(GFP_KERNEL|__GFP_ZERO); |
| if (!vcpu->arch.shared) |
| goto uninit_vcpu; |
| |
| vcpu->arch.host_retip = kvm_return_point; |
| vcpu->arch.host_msr = mfmsr(); |
| #ifdef CONFIG_PPC_BOOK3S_64 |
| /* default to book3s_64 (970fx) */ |
| vcpu->arch.pvr = 0x3C0301; |
| #else |
| /* default to book3s_32 (750) */ |
| vcpu->arch.pvr = 0x84202; |
| #endif |
| kvmppc_set_pvr(vcpu, vcpu->arch.pvr); |
| vcpu_book3s->slb_nr = 64; |
| |
| /* remember where some real-mode handlers are */ |
| vcpu->arch.trampoline_lowmem = kvmppc_trampoline_lowmem; |
| vcpu->arch.trampoline_enter = kvmppc_trampoline_enter; |
| vcpu->arch.highmem_handler = (ulong)kvmppc_handler_highmem; |
| #ifdef CONFIG_PPC_BOOK3S_64 |
| vcpu->arch.rmcall = *(ulong*)kvmppc_rmcall; |
| #else |
| vcpu->arch.rmcall = (ulong)kvmppc_rmcall; |
| #endif |
| |
| vcpu->arch.shadow_msr = MSR_USER64; |
| |
| err = kvmppc_mmu_init(vcpu); |
| if (err < 0) |
| goto uninit_vcpu; |
| |
| return vcpu; |
| |
| uninit_vcpu: |
| kvm_vcpu_uninit(vcpu); |
| free_shadow_vcpu: |
| kfree(vcpu_book3s->shadow_vcpu); |
| free_vcpu: |
| vfree(vcpu_book3s); |
| out: |
| return ERR_PTR(err); |
| } |
| |
| void kvmppc_core_vcpu_free(struct kvm_vcpu *vcpu) |
| { |
| struct kvmppc_vcpu_book3s *vcpu_book3s = to_book3s(vcpu); |
| |
| free_page((unsigned long)vcpu->arch.shared); |
| kvm_vcpu_uninit(vcpu); |
| kfree(vcpu_book3s->shadow_vcpu); |
| vfree(vcpu_book3s); |
| } |
| |
| extern int __kvmppc_vcpu_entry(struct kvm_run *kvm_run, struct kvm_vcpu *vcpu); |
| int __kvmppc_vcpu_run(struct kvm_run *kvm_run, struct kvm_vcpu *vcpu) |
| { |
| int ret; |
| double fpr[32][TS_FPRWIDTH]; |
| unsigned int fpscr; |
| int fpexc_mode; |
| #ifdef CONFIG_ALTIVEC |
| vector128 vr[32]; |
| vector128 vscr; |
| unsigned long uninitialized_var(vrsave); |
| int used_vr; |
| #endif |
| #ifdef CONFIG_VSX |
| int used_vsr; |
| #endif |
| ulong ext_msr; |
| |
| /* No need to go into the guest when all we do is going out */ |
| if (signal_pending(current)) { |
| kvm_run->exit_reason = KVM_EXIT_INTR; |
| return -EINTR; |
| } |
| |
| /* Save FPU state in stack */ |
| if (current->thread.regs->msr & MSR_FP) |
| giveup_fpu(current); |
| memcpy(fpr, current->thread.fpr, sizeof(current->thread.fpr)); |
| fpscr = current->thread.fpscr.val; |
| fpexc_mode = current->thread.fpexc_mode; |
| |
| #ifdef CONFIG_ALTIVEC |
| /* Save Altivec state in stack */ |
| used_vr = current->thread.used_vr; |
| if (used_vr) { |
| if (current->thread.regs->msr & MSR_VEC) |
| giveup_altivec(current); |
| memcpy(vr, current->thread.vr, sizeof(current->thread.vr)); |
| vscr = current->thread.vscr; |
| vrsave = current->thread.vrsave; |
| } |
| #endif |
| |
| #ifdef CONFIG_VSX |
| /* Save VSX state in stack */ |
| used_vsr = current->thread.used_vsr; |
| if (used_vsr && (current->thread.regs->msr & MSR_VSX)) |
| __giveup_vsx(current); |
| #endif |
| |
| /* Remember the MSR with disabled extensions */ |
| ext_msr = current->thread.regs->msr; |
| |
| /* XXX we get called with irq disabled - change that! */ |
| local_irq_enable(); |
| |
| /* Preload FPU if it's enabled */ |
| if (vcpu->arch.shared->msr & MSR_FP) |
| kvmppc_handle_ext(vcpu, BOOK3S_INTERRUPT_FP_UNAVAIL, MSR_FP); |
| |
| ret = __kvmppc_vcpu_entry(kvm_run, vcpu); |
| |
| local_irq_disable(); |
| |
| current->thread.regs->msr = ext_msr; |
| |
| /* Make sure we save the guest FPU/Altivec/VSX state */ |
| kvmppc_giveup_ext(vcpu, MSR_FP); |
| kvmppc_giveup_ext(vcpu, MSR_VEC); |
| kvmppc_giveup_ext(vcpu, MSR_VSX); |
| |
| /* Restore FPU state from stack */ |
| memcpy(current->thread.fpr, fpr, sizeof(current->thread.fpr)); |
| current->thread.fpscr.val = fpscr; |
| current->thread.fpexc_mode = fpexc_mode; |
| |
| #ifdef CONFIG_ALTIVEC |
| /* Restore Altivec state from stack */ |
| if (used_vr && current->thread.used_vr) { |
| memcpy(current->thread.vr, vr, sizeof(current->thread.vr)); |
| current->thread.vscr = vscr; |
| current->thread.vrsave = vrsave; |
| } |
| current->thread.used_vr = used_vr; |
| #endif |
| |
| #ifdef CONFIG_VSX |
| current->thread.used_vsr = used_vsr; |
| #endif |
| |
| return ret; |
| } |
| |
| static int kvmppc_book3s_init(void) |
| { |
| int r; |
| |
| r = kvm_init(NULL, sizeof(struct kvmppc_vcpu_book3s), 0, |
| THIS_MODULE); |
| |
| if (r) |
| return r; |
| |
| r = kvmppc_mmu_hpte_sysinit(); |
| |
| return r; |
| } |
| |
| static void kvmppc_book3s_exit(void) |
| { |
| kvmppc_mmu_hpte_sysexit(); |
| kvm_exit(); |
| } |
| |
| module_init(kvmppc_book3s_init); |
| module_exit(kvmppc_book3s_exit); |