/* * 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. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. * * Copyright IBM Corp. 2007 * Copyright 2010-2011 Freescale Semiconductor, Inc. * * Authors: Hollis Blanchard * Christian Ehrhardt * Scott Wood * Varun Sethi */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include "timing.h" #include "booke.h" unsigned long kvmppc_booke_handlers; #define VM_STAT(x) offsetof(struct kvm, stat.x), KVM_STAT_VM #define VCPU_STAT(x) offsetof(struct kvm_vcpu, stat.x), KVM_STAT_VCPU struct kvm_stats_debugfs_item debugfs_entries[] = { { "mmio", VCPU_STAT(mmio_exits) }, { "dcr", VCPU_STAT(dcr_exits) }, { "sig", VCPU_STAT(signal_exits) }, { "itlb_r", VCPU_STAT(itlb_real_miss_exits) }, { "itlb_v", VCPU_STAT(itlb_virt_miss_exits) }, { "dtlb_r", VCPU_STAT(dtlb_real_miss_exits) }, { "dtlb_v", VCPU_STAT(dtlb_virt_miss_exits) }, { "sysc", VCPU_STAT(syscall_exits) }, { "isi", VCPU_STAT(isi_exits) }, { "dsi", VCPU_STAT(dsi_exits) }, { "inst_emu", VCPU_STAT(emulated_inst_exits) }, { "dec", VCPU_STAT(dec_exits) }, { "ext_intr", VCPU_STAT(ext_intr_exits) }, { "halt_wakeup", VCPU_STAT(halt_wakeup) }, { "doorbell", VCPU_STAT(dbell_exits) }, { "guest doorbell", VCPU_STAT(gdbell_exits) }, { NULL } }; /* TODO: use vcpu_printf() */ void kvmppc_dump_vcpu(struct kvm_vcpu *vcpu) { int i; printk("pc: %08lx msr: %08llx\n", vcpu->arch.pc, vcpu->arch.shared->msr); printk("lr: %08lx ctr: %08lx\n", vcpu->arch.lr, vcpu->arch.ctr); printk("srr0: %08llx srr1: %08llx\n", vcpu->arch.shared->srr0, vcpu->arch.shared->srr1); printk("exceptions: %08lx\n", vcpu->arch.pending_exceptions); for (i = 0; i < 32; i += 4) { printk("gpr%02d: %08lx %08lx %08lx %08lx\n", i, kvmppc_get_gpr(vcpu, i), kvmppc_get_gpr(vcpu, i+1), kvmppc_get_gpr(vcpu, i+2), kvmppc_get_gpr(vcpu, i+3)); } } #ifdef CONFIG_SPE void kvmppc_vcpu_disable_spe(struct kvm_vcpu *vcpu) { preempt_disable(); enable_kernel_spe(); kvmppc_save_guest_spe(vcpu); vcpu->arch.shadow_msr &= ~MSR_SPE; preempt_enable(); } static void kvmppc_vcpu_enable_spe(struct kvm_vcpu *vcpu) { preempt_disable(); enable_kernel_spe(); kvmppc_load_guest_spe(vcpu); vcpu->arch.shadow_msr |= MSR_SPE; preempt_enable(); } static void kvmppc_vcpu_sync_spe(struct kvm_vcpu *vcpu) { if (vcpu->arch.shared->msr & MSR_SPE) { if (!(vcpu->arch.shadow_msr & MSR_SPE)) kvmppc_vcpu_enable_spe(vcpu); } else if (vcpu->arch.shadow_msr & MSR_SPE) { kvmppc_vcpu_disable_spe(vcpu); } } #else static void kvmppc_vcpu_sync_spe(struct kvm_vcpu *vcpu) { } #endif /* * Helper function for "full" MSR writes. No need to call this if only * EE/CE/ME/DE/RI are changing. */ void kvmppc_set_msr(struct kvm_vcpu *vcpu, u32 new_msr) { u32 old_msr = vcpu->arch.shared->msr; #ifdef CONFIG_KVM_BOOKE_HV new_msr |= MSR_GS; #endif vcpu->arch.shared->msr = new_msr; kvmppc_mmu_msr_notify(vcpu, old_msr); kvmppc_vcpu_sync_spe(vcpu); } static void kvmppc_booke_queue_irqprio(struct kvm_vcpu *vcpu, unsigned int priority) { set_bit(priority, &vcpu->arch.pending_exceptions); } static void kvmppc_core_queue_dtlb_miss(struct kvm_vcpu *vcpu, ulong dear_flags, ulong esr_flags) { vcpu->arch.queued_dear = dear_flags; vcpu->arch.queued_esr = esr_flags; kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_DTLB_MISS); } static void kvmppc_core_queue_data_storage(struct kvm_vcpu *vcpu, ulong dear_flags, ulong esr_flags) { vcpu->arch.queued_dear = dear_flags; vcpu->arch.queued_esr = esr_flags; kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_DATA_STORAGE); } static void kvmppc_core_queue_inst_storage(struct kvm_vcpu *vcpu, ulong esr_flags) { vcpu->arch.queued_esr = esr_flags; kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_INST_STORAGE); } void kvmppc_core_queue_program(struct kvm_vcpu *vcpu, ulong esr_flags) { vcpu->arch.queued_esr = esr_flags; kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_PROGRAM); } void kvmppc_core_queue_dec(struct kvm_vcpu *vcpu) { kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_DECREMENTER); } int kvmppc_core_pending_dec(struct kvm_vcpu *vcpu) { return test_bit(BOOKE_IRQPRIO_DECREMENTER, &vcpu->arch.pending_exceptions); } void kvmppc_core_dequeue_dec(struct kvm_vcpu *vcpu) { clear_bit(BOOKE_IRQPRIO_DECREMENTER, &vcpu->arch.pending_exceptions); } void kvmppc_core_queue_external(struct kvm_vcpu *vcpu, struct kvm_interrupt *irq) { unsigned int prio = BOOKE_IRQPRIO_EXTERNAL; if (irq->irq == KVM_INTERRUPT_SET_LEVEL) prio = BOOKE_IRQPRIO_EXTERNAL_LEVEL; kvmppc_booke_queue_irqprio(vcpu, prio); } void kvmppc_core_dequeue_external(struct kvm_vcpu *vcpu, struct kvm_interrupt *irq) { clear_bit(BOOKE_IRQPRIO_EXTERNAL, &vcpu->arch.pending_exceptions); clear_bit(BOOKE_IRQPRIO_EXTERNAL_LEVEL, &vcpu->arch.pending_exceptions); } static void set_guest_srr(struct kvm_vcpu *vcpu, unsigned long srr0, u32 srr1) { #ifdef CONFIG_KVM_BOOKE_HV mtspr(SPRN_GSRR0, srr0); mtspr(SPRN_GSRR1, srr1); #else vcpu->arch.shared->srr0 = srr0; vcpu->arch.shared->srr1 = srr1; #endif } static void set_guest_csrr(struct kvm_vcpu *vcpu, unsigned long srr0, u32 srr1) { vcpu->arch.csrr0 = srr0; vcpu->arch.csrr1 = srr1; } static void set_guest_dsrr(struct kvm_vcpu *vcpu, unsigned long srr0, u32 srr1) { if (cpu_has_feature(CPU_FTR_DEBUG_LVL_EXC)) { vcpu->arch.dsrr0 = srr0; vcpu->arch.dsrr1 = srr1; } else { set_guest_csrr(vcpu, srr0, srr1); } } static void set_guest_mcsrr(struct kvm_vcpu *vcpu, unsigned long srr0, u32 srr1) { vcpu->arch.mcsrr0 = srr0; vcpu->arch.mcsrr1 = srr1; } static unsigned long get_guest_dear(struct kvm_vcpu *vcpu) { #ifdef CONFIG_KVM_BOOKE_HV return mfspr(SPRN_GDEAR); #else return vcpu->arch.shared->dar; #endif } static void set_guest_dear(struct kvm_vcpu *vcpu, unsigned long dear) { #ifdef CONFIG_KVM_BOOKE_HV mtspr(SPRN_GDEAR, dear); #else vcpu->arch.shared->dar = dear; #endif } static unsigned long get_guest_esr(struct kvm_vcpu *vcpu) { #ifdef CONFIG_KVM_BOOKE_HV return mfspr(SPRN_GESR); #else return vcpu->arch.shared->esr; #endif } static void set_guest_esr(struct kvm_vcpu *vcpu, u32 esr) { #ifdef CONFIG_KVM_BOOKE_HV mtspr(SPRN_GESR, esr); #else vcpu->arch.shared->esr = esr; #endif } /* Deliver the interrupt of the corresponding priority, if possible. */ static int kvmppc_booke_irqprio_deliver(struct kvm_vcpu *vcpu, unsigned int priority) { int allowed = 0; ulong msr_mask = 0; bool update_esr = false, update_dear = false; ulong crit_raw = vcpu->arch.shared->critical; ulong crit_r1 = kvmppc_get_gpr(vcpu, 1); bool crit; bool keep_irq = false; enum int_class int_class; /* 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); if (priority == BOOKE_IRQPRIO_EXTERNAL_LEVEL) { priority = BOOKE_IRQPRIO_EXTERNAL; keep_irq = true; } switch (priority) { case BOOKE_IRQPRIO_DTLB_MISS: case BOOKE_IRQPRIO_DATA_STORAGE: update_dear = true; /* fall through */ case BOOKE_IRQPRIO_INST_STORAGE: case BOOKE_IRQPRIO_PROGRAM: update_esr = true; /* fall through */ case BOOKE_IRQPRIO_ITLB_MISS: case BOOKE_IRQPRIO_SYSCALL: case BOOKE_IRQPRIO_FP_UNAVAIL: case BOOKE_IRQPRIO_SPE_UNAVAIL: case BOOKE_IRQPRIO_SPE_FP_DATA: case BOOKE_IRQPRIO_SPE_FP_ROUND: case BOOKE_IRQPRIO_AP_UNAVAIL: case BOOKE_IRQPRIO_ALIGNMENT: allowed = 1; msr_mask = MSR_CE | MSR_ME | MSR_DE; int_class = INT_CLASS_NONCRIT; break; case BOOKE_IRQPRIO_CRITICAL: case BOOKE_IRQPRIO_DBELL_CRIT: allowed = vcpu->arch.shared->msr & MSR_CE; allowed = allowed && !crit; msr_mask = MSR_ME; int_class = INT_CLASS_CRIT; break; case BOOKE_IRQPRIO_MACHINE_CHECK: allowed = vcpu->arch.shared->msr & MSR_ME; allowed = allowed && !crit; int_class = INT_CLASS_MC; break; case BOOKE_IRQPRIO_DECREMENTER: case BOOKE_IRQPRIO_FIT: keep_irq = true; /* fall through */ case BOOKE_IRQPRIO_EXTERNAL: case BOOKE_IRQPRIO_DBELL: allowed = vcpu->arch.shared->msr & MSR_EE; allowed = allowed && !crit; msr_mask = MSR_CE | MSR_ME | MSR_DE; int_class = INT_CLASS_NONCRIT; break; case BOOKE_IRQPRIO_DEBUG: allowed = vcpu->arch.shared->msr & MSR_DE; allowed = allowed && !crit; msr_mask = MSR_ME; int_class = INT_CLASS_CRIT; break; } if (allowed) { switch (int_class) { case INT_CLASS_NONCRIT: set_guest_srr(vcpu, vcpu->arch.pc, vcpu->arch.shared->msr); break; case INT_CLASS_CRIT: set_guest_csrr(vcpu, vcpu->arch.pc, vcpu->arch.shared->msr); break; case INT_CLASS_DBG: set_guest_dsrr(vcpu, vcpu->arch.pc, vcpu->arch.shared->msr); break; case INT_CLASS_MC: set_guest_mcsrr(vcpu, vcpu->arch.pc, vcpu->arch.shared->msr); break; } vcpu->arch.pc = vcpu->arch.ivpr | vcpu->arch.ivor[priority]; if (update_esr == true) set_guest_esr(vcpu, vcpu->arch.queued_esr); if (update_dear == true) set_guest_dear(vcpu, vcpu->arch.queued_dear); kvmppc_set_msr(vcpu, vcpu->arch.shared->msr & msr_mask); if (!keep_irq) clear_bit(priority, &vcpu->arch.pending_exceptions); } #ifdef CONFIG_KVM_BOOKE_HV /* * If an interrupt is pending but masked, raise a guest doorbell * so that we are notified when the guest enables the relevant * MSR bit. */ if (vcpu->arch.pending_exceptions & BOOKE_IRQMASK_EE) kvmppc_set_pending_interrupt(vcpu, INT_CLASS_NONCRIT); if (vcpu->arch.pending_exceptions & BOOKE_IRQMASK_CE) kvmppc_set_pending_interrupt(vcpu, INT_CLASS_CRIT); if (vcpu->arch.pending_exceptions & BOOKE_IRQPRIO_MACHINE_CHECK) kvmppc_set_pending_interrupt(vcpu, INT_CLASS_MC); #endif return allowed; } static void update_timer_ints(struct kvm_vcpu *vcpu) { if ((vcpu->arch.tcr & TCR_DIE) && (vcpu->arch.tsr & TSR_DIS)) kvmppc_core_queue_dec(vcpu); else kvmppc_core_dequeue_dec(vcpu); } static void kvmppc_core_check_exceptions(struct kvm_vcpu *vcpu) { unsigned long *pending = &vcpu->arch.pending_exceptions; unsigned int priority; if (vcpu->requests) { if (kvm_check_request(KVM_REQ_PENDING_TIMER, vcpu)) { smp_mb(); update_timer_ints(vcpu); } } priority = __ffs(*pending); while (priority < BOOKE_IRQPRIO_MAX) { if (kvmppc_booke_irqprio_deliver(vcpu, priority)) break; priority = find_next_bit(pending, BITS_PER_BYTE * sizeof(*pending), priority + 1); } /* Tell the guest about our interrupt status */ vcpu->arch.shared->int_pending = !!*pending; } /* Check pending exceptions and deliver one, if possible. */ int kvmppc_core_prepare_to_enter(struct kvm_vcpu *vcpu) { int r = 0; WARN_ON_ONCE(!irqs_disabled()); kvmppc_core_check_exceptions(vcpu); if (vcpu->arch.shared->msr & MSR_WE) { local_irq_enable(); kvm_vcpu_block(vcpu); local_irq_disable(); kvmppc_set_exit_type(vcpu, EMULATED_MTMSRWE_EXITS); r = 1; }; return r; } /* * Common checks before entering the guest world. Call with interrupts * disabled. * * returns !0 if a signal is pending and check_signal is true */ static int kvmppc_prepare_to_enter(struct kvm_vcpu *vcpu) { int r = 0; WARN_ON_ONCE(!irqs_disabled()); while (true) { if (need_resched()) { local_irq_enable(); cond_resched(); local_irq_disable(); continue; } if (signal_pending(current)) { r = 1; break; } if (kvmppc_core_prepare_to_enter(vcpu)) { /* interrupts got enabled in between, so we are back at square 1 */ continue; } break; } return r; } int kvmppc_vcpu_run(struct kvm_run *kvm_run, struct kvm_vcpu *vcpu) { int ret; #ifdef CONFIG_PPC_FPU unsigned int fpscr; int fpexc_mode; u64 fpr[32]; #endif if (!vcpu->arch.sane) { kvm_run->exit_reason = KVM_EXIT_INTERNAL_ERROR; return -EINVAL; } local_irq_disable(); if (kvmppc_prepare_to_enter(vcpu)) { kvm_run->exit_reason = KVM_EXIT_INTR; ret = -EINTR; goto out; } kvm_guest_enter(); #ifdef CONFIG_PPC_FPU /* Save userspace FPU state in stack */ enable_kernel_fp(); memcpy(fpr, current->thread.fpr, sizeof(current->thread.fpr)); fpscr = current->thread.fpscr.val; fpexc_mode = current->thread.fpexc_mode; /* Restore guest FPU state to thread */ memcpy(current->thread.fpr, vcpu->arch.fpr, sizeof(vcpu->arch.fpr)); current->thread.fpscr.val = vcpu->arch.fpscr; /* * Since we can't trap on MSR_FP in GS-mode, we consider the guest * as always using the FPU. Kernel usage of FP (via * enable_kernel_fp()) in this thread must not occur while * vcpu->fpu_active is set. */ vcpu->fpu_active = 1; kvmppc_load_guest_fp(vcpu); #endif ret = __kvmppc_vcpu_run(kvm_run, vcpu); #ifdef CONFIG_PPC_FPU kvmppc_save_guest_fp(vcpu); vcpu->fpu_active = 0; /* Save guest FPU state from thread */ memcpy(vcpu->arch.fpr, current->thread.fpr, sizeof(vcpu->arch.fpr)); vcpu->arch.fpscr = current->thread.fpscr.val; /* Restore userspace FPU state from stack */ memcpy(current->thread.fpr, fpr, sizeof(current->thread.fpr)); current->thread.fpscr.val = fpscr; current->thread.fpexc_mode = fpexc_mode; #endif kvm_guest_exit(); out: local_irq_enable(); return ret; } static int emulation_exit(struct kvm_run *run, struct kvm_vcpu *vcpu) { enum emulation_result er; er = kvmppc_emulate_instruction(run, vcpu); switch (er) { case EMULATE_DONE: /* don't overwrite subtypes, just account kvm_stats */ kvmppc_account_exit_stat(vcpu, EMULATED_INST_EXITS); /* Future optimization: only reload non-volatiles if * they were actually modified by emulation. */ return RESUME_GUEST_NV; case EMULATE_DO_DCR: run->exit_reason = KVM_EXIT_DCR; return RESUME_HOST; case EMULATE_FAIL: printk(KERN_CRIT "%s: emulation at %lx failed (%08x)\n", __func__, vcpu->arch.pc, vcpu->arch.last_inst); /* For debugging, encode the failing instruction and * report it to userspace. */ run->hw.hardware_exit_reason = ~0ULL << 32; run->hw.hardware_exit_reason |= vcpu->arch.last_inst; kvmppc_core_queue_program(vcpu, ESR_PIL); return RESUME_HOST; default: BUG(); } } static void kvmppc_fill_pt_regs(struct pt_regs *regs) { ulong r1, ip, msr, lr; asm("mr %0, 1" : "=r"(r1)); asm("mflr %0" : "=r"(lr)); asm("mfmsr %0" : "=r"(msr)); asm("bl 1f; 1: mflr %0" : "=r"(ip)); memset(regs, 0, sizeof(*regs)); regs->gpr[1] = r1; regs->nip = ip; regs->msr = msr; regs->link = lr; } static void kvmppc_restart_interrupt(struct kvm_vcpu *vcpu, unsigned int exit_nr) { struct pt_regs regs; switch (exit_nr) { case BOOKE_INTERRUPT_EXTERNAL: kvmppc_fill_pt_regs(®s); do_IRQ(®s); break; case BOOKE_INTERRUPT_DECREMENTER: kvmppc_fill_pt_regs(®s); timer_interrupt(®s); break; #if defined(CONFIG_PPC_FSL_BOOK3E) || defined(CONFIG_PPC_BOOK3E_64) case BOOKE_INTERRUPT_DOORBELL: kvmppc_fill_pt_regs(®s); doorbell_exception(®s); break; #endif case BOOKE_INTERRUPT_MACHINE_CHECK: /* FIXME */ break; case BOOKE_INTERRUPT_PERFORMANCE_MONITOR: kvmppc_fill_pt_regs(®s); performance_monitor_exception(®s); break; } } /** * kvmppc_handle_exit * * Return value is in the form (errcode<<2 | RESUME_FLAG_HOST | RESUME_FLAG_NV) */ int kvmppc_handle_exit(struct kvm_run *run, struct kvm_vcpu *vcpu, unsigned int exit_nr) { int r = RESUME_HOST; /* update before a new last_exit_type is rewritten */ kvmppc_update_timing_stats(vcpu); /* restart interrupts if they were meant for the host */ kvmppc_restart_interrupt(vcpu, exit_nr); local_irq_enable(); run->exit_reason = KVM_EXIT_UNKNOWN; run->ready_for_interrupt_injection = 1; switch (exit_nr) { case BOOKE_INTERRUPT_MACHINE_CHECK: printk("MACHINE CHECK: %lx\n", mfspr(SPRN_MCSR)); kvmppc_dump_vcpu(vcpu); /* For debugging, send invalid exit reason to user space */ run->hw.hardware_exit_reason = ~1ULL << 32; run->hw.hardware_exit_reason |= mfspr(SPRN_MCSR); r = RESUME_HOST; break; case BOOKE_INTERRUPT_EXTERNAL: kvmppc_account_exit(vcpu, EXT_INTR_EXITS); r = RESUME_GUEST; break; case BOOKE_INTERRUPT_DECREMENTER: kvmppc_account_exit(vcpu, DEC_EXITS); r = RESUME_GUEST; break; case BOOKE_INTERRUPT_DOORBELL: kvmppc_account_exit(vcpu, DBELL_EXITS); r = RESUME_GUEST; break; case BOOKE_INTERRUPT_GUEST_DBELL_CRIT: kvmppc_account_exit(vcpu, GDBELL_EXITS); /* * We are here because there is a pending guest interrupt * which could not be delivered as MSR_CE or MSR_ME was not * set. Once we break from here we will retry delivery. */ r = RESUME_GUEST; break; case BOOKE_INTERRUPT_GUEST_DBELL: kvmppc_account_exit(vcpu, GDBELL_EXITS); /* * We are here because there is a pending guest interrupt * which could not be delivered as MSR_EE was not set. Once * we break from here we will retry delivery. */ r = RESUME_GUEST; break; case BOOKE_INTERRUPT_PERFORMANCE_MONITOR: r = RESUME_GUEST; break; case BOOKE_INTERRUPT_HV_PRIV: r = emulation_exit(run, vcpu); break; case BOOKE_INTERRUPT_PROGRAM: if (vcpu->arch.shared->msr & (MSR_PR | MSR_GS)) { /* * Program traps generated by user-level software must * be handled by the guest kernel. * * In GS mode, hypervisor privileged instructions trap * on BOOKE_INTERRUPT_HV_PRIV, not here, so these are * actual program interrupts, handled by the guest. */ kvmppc_core_queue_program(vcpu, vcpu->arch.fault_esr); r = RESUME_GUEST; kvmppc_account_exit(vcpu, USR_PR_INST); break; } r = emulation_exit(run, vcpu); break; case BOOKE_INTERRUPT_FP_UNAVAIL: kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_FP_UNAVAIL); kvmppc_account_exit(vcpu, FP_UNAVAIL); r = RESUME_GUEST; break; #ifdef CONFIG_SPE case BOOKE_INTERRUPT_SPE_UNAVAIL: { if (vcpu->arch.shared->msr & MSR_SPE) kvmppc_vcpu_enable_spe(vcpu); else kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_SPE_UNAVAIL); r = RESUME_GUEST; break; } case BOOKE_INTERRUPT_SPE_FP_DATA: kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_SPE_FP_DATA); r = RESUME_GUEST; break; case BOOKE_INTERRUPT_SPE_FP_ROUND: kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_SPE_FP_ROUND); r = RESUME_GUEST; break; #else case BOOKE_INTERRUPT_SPE_UNAVAIL: /* * Guest wants SPE, but host kernel doesn't support it. Send * an "unimplemented operation" program check to the guest. */ kvmppc_core_queue_program(vcpu, ESR_PUO | ESR_SPV); r = RESUME_GUEST; break; /* * These really should never happen without CONFIG_SPE, * as we should never enable the real MSR[SPE] in the guest. */ case BOOKE_INTERRUPT_SPE_FP_DATA: case BOOKE_INTERRUPT_SPE_FP_ROUND: printk(KERN_CRIT "%s: unexpected SPE interrupt %u at %08lx\n", __func__, exit_nr, vcpu->arch.pc); run->hw.hardware_exit_reason = exit_nr; r = RESUME_HOST; break; #endif case BOOKE_INTERRUPT_DATA_STORAGE: kvmppc_core_queue_data_storage(vcpu, vcpu->arch.fault_dear, vcpu->arch.fault_esr); kvmppc_account_exit(vcpu, DSI_EXITS); r = RESUME_GUEST; break; case BOOKE_INTERRUPT_INST_STORAGE: kvmppc_core_queue_inst_storage(vcpu, vcpu->arch.fault_esr); kvmppc_account_exit(vcpu, ISI_EXITS); r = RESUME_GUEST; break; #ifdef CONFIG_KVM_BOOKE_HV case BOOKE_INTERRUPT_HV_SYSCALL: if (!(vcpu->arch.shared->msr & MSR_PR)) { kvmppc_set_gpr(vcpu, 3, kvmppc_kvm_pv(vcpu)); } else { /* * hcall from guest userspace -- send privileged * instruction program check. */ kvmppc_core_queue_program(vcpu, ESR_PPR); } r = RESUME_GUEST; break; #else case BOOKE_INTERRUPT_SYSCALL: 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 */ kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_SYSCALL); } kvmppc_account_exit(vcpu, SYSCALL_EXITS); r = RESUME_GUEST; break; #endif case BOOKE_INTERRUPT_DTLB_MISS: { unsigned long eaddr = vcpu->arch.fault_dear; int gtlb_index; gpa_t gpaddr; gfn_t gfn; #ifdef CONFIG_KVM_E500V2 if (!(vcpu->arch.shared->msr & MSR_PR) && (eaddr & PAGE_MASK) == vcpu->arch.magic_page_ea) { kvmppc_map_magic(vcpu); kvmppc_account_exit(vcpu, DTLB_VIRT_MISS_EXITS); r = RESUME_GUEST; break; } #endif /* Check the guest TLB. */ gtlb_index = kvmppc_mmu_dtlb_index(vcpu, eaddr); if (gtlb_index < 0) { /* The guest didn't have a mapping for it. */ kvmppc_core_queue_dtlb_miss(vcpu, vcpu->arch.fault_dear, vcpu->arch.fault_esr); kvmppc_mmu_dtlb_miss(vcpu); kvmppc_account_exit(vcpu, DTLB_REAL_MISS_EXITS); r = RESUME_GUEST; break; } gpaddr = kvmppc_mmu_xlate(vcpu, gtlb_index, eaddr); gfn = gpaddr >> PAGE_SHIFT; if (kvm_is_visible_gfn(vcpu->kvm, gfn)) { /* The guest TLB had a mapping, but the shadow TLB * didn't, and it is RAM. This could be because: * a) the entry is mapping the host kernel, or * b) the guest used a large mapping which we're faking * Either way, we need to satisfy the fault without * invoking the guest. */ kvmppc_mmu_map(vcpu, eaddr, gpaddr, gtlb_index); kvmppc_account_exit(vcpu, DTLB_VIRT_MISS_EXITS); r = RESUME_GUEST; } else { /* Guest has mapped and accessed a page which is not * actually RAM. */ vcpu->arch.paddr_accessed = gpaddr; r = kvmppc_emulate_mmio(run, vcpu); kvmppc_account_exit(vcpu, MMIO_EXITS); } break; } case BOOKE_INTERRUPT_ITLB_MISS: { unsigned long eaddr = vcpu->arch.pc; gpa_t gpaddr; gfn_t gfn; int gtlb_index; r = RESUME_GUEST; /* Check the guest TLB. */ gtlb_index = kvmppc_mmu_itlb_index(vcpu, eaddr); if (gtlb_index < 0) { /* The guest didn't have a mapping for it. */ kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_ITLB_MISS); kvmppc_mmu_itlb_miss(vcpu); kvmppc_account_exit(vcpu, ITLB_REAL_MISS_EXITS); break; } kvmppc_account_exit(vcpu, ITLB_VIRT_MISS_EXITS); gpaddr = kvmppc_mmu_xlate(vcpu, gtlb_index, eaddr); gfn = gpaddr >> PAGE_SHIFT; if (kvm_is_visible_gfn(vcpu->kvm, gfn)) { /* The guest TLB had a mapping, but the shadow TLB * didn't. This could be because: * a) the entry is mapping the host kernel, or * b) the guest used a large mapping which we're faking * Either way, we need to satisfy the fault without * invoking the guest. */ kvmppc_mmu_map(vcpu, eaddr, gpaddr, gtlb_index); } else { /* Guest mapped and leaped at non-RAM! */ kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_MACHINE_CHECK); } break; } case BOOKE_INTERRUPT_DEBUG: { u32 dbsr; vcpu->arch.pc = mfspr(SPRN_CSRR0); /* clear IAC events in DBSR register */ dbsr = mfspr(SPRN_DBSR); dbsr &= DBSR_IAC1 | DBSR_IAC2 | DBSR_IAC3 | DBSR_IAC4; mtspr(SPRN_DBSR, dbsr); run->exit_reason = KVM_EXIT_DEBUG; kvmppc_account_exit(vcpu, DEBUG_EXITS); r = RESUME_HOST; break; } default: printk(KERN_EMERG "exit_nr %d\n", exit_nr); BUG(); } /* * To avoid clobbering exit_reason, only check for signals if we * aren't already exiting to userspace for some other reason. */ if (!(r & RESUME_HOST)) { local_irq_disable(); if (kvmppc_prepare_to_enter(vcpu)) { run->exit_reason = KVM_EXIT_INTR; r = (-EINTR << 2) | RESUME_HOST | (r & RESUME_FLAG_NV); kvmppc_account_exit(vcpu, SIGNAL_EXITS); } } return r; } /* Initial guest state: 16MB mapping 0 -> 0, PC = 0, MSR = 0, R1 = 16MB */ int kvm_arch_vcpu_setup(struct kvm_vcpu *vcpu) { int i; int r; vcpu->arch.pc = 0; vcpu->arch.shared->pir = vcpu->vcpu_id; kvmppc_set_gpr(vcpu, 1, (16<<20) - 8); /* -8 for the callee-save LR slot */ kvmppc_set_msr(vcpu, 0); #ifndef CONFIG_KVM_BOOKE_HV vcpu->arch.shadow_msr = MSR_USER | MSR_DE | MSR_IS | MSR_DS; vcpu->arch.shadow_pid = 1; vcpu->arch.shared->msr = 0; #endif /* Eye-catching numbers so we know if the guest takes an interrupt * before it's programmed its own IVPR/IVORs. */ vcpu->arch.ivpr = 0x55550000; for (i = 0; i < BOOKE_IRQPRIO_MAX; i++) vcpu->arch.ivor[i] = 0x7700 | i * 4; kvmppc_init_timing_stats(vcpu); r = kvmppc_core_vcpu_setup(vcpu); kvmppc_sanity_check(vcpu); return r; } int kvm_arch_vcpu_ioctl_get_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs) { int i; regs->pc = vcpu->arch.pc; regs->cr = kvmppc_get_cr(vcpu); regs->ctr = vcpu->arch.ctr; regs->lr = vcpu->arch.lr; 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->sprg4 = vcpu->arch.shared->sprg4; regs->sprg5 = vcpu->arch.shared->sprg5; regs->sprg6 = vcpu->arch.shared->sprg6; regs->sprg7 = vcpu->arch.shared->sprg7; 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; vcpu->arch.pc = regs->pc; kvmppc_set_cr(vcpu, regs->cr); vcpu->arch.ctr = regs->ctr; vcpu->arch.lr = 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; kvmppc_set_pid(vcpu, regs->pid); 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.shared->sprg4 = regs->sprg4; vcpu->arch.shared->sprg5 = regs->sprg5; vcpu->arch.shared->sprg6 = regs->sprg6; vcpu->arch.shared->sprg7 = regs->sprg7; for (i = 0; i < ARRAY_SIZE(regs->gpr); i++) kvmppc_set_gpr(vcpu, i, regs->gpr[i]); return 0; } static void get_sregs_base(struct kvm_vcpu *vcpu, struct kvm_sregs *sregs) { u64 tb = get_tb(); sregs->u.e.features |= KVM_SREGS_E_BASE; sregs->u.e.csrr0 = vcpu->arch.csrr0; sregs->u.e.csrr1 = vcpu->arch.csrr1; sregs->u.e.mcsr = vcpu->arch.mcsr; sregs->u.e.esr = get_guest_esr(vcpu); sregs->u.e.dear = get_guest_dear(vcpu); sregs->u.e.tsr = vcpu->arch.tsr; sregs->u.e.tcr = vcpu->arch.tcr; sregs->u.e.dec = kvmppc_get_dec(vcpu, tb); sregs->u.e.tb = tb; sregs->u.e.vrsave = vcpu->arch.vrsave; } static int set_sregs_base(struct kvm_vcpu *vcpu, struct kvm_sregs *sregs) { if (!(sregs->u.e.features & KVM_SREGS_E_BASE)) return 0; vcpu->arch.csrr0 = sregs->u.e.csrr0; vcpu->arch.csrr1 = sregs->u.e.csrr1; vcpu->arch.mcsr = sregs->u.e.mcsr; set_guest_esr(vcpu, sregs->u.e.esr); set_guest_dear(vcpu, sregs->u.e.dear); vcpu->arch.vrsave = sregs->u.e.vrsave; kvmppc_set_tcr(vcpu, sregs->u.e.tcr); if (sregs->u.e.update_special & KVM_SREGS_E_UPDATE_DEC) { vcpu->arch.dec = sregs->u.e.dec; kvmppc_emulate_dec(vcpu); } if (sregs->u.e.update_special & KVM_SREGS_E_UPDATE_TSR) { vcpu->arch.tsr = sregs->u.e.tsr; update_timer_ints(vcpu); } return 0; } static void get_sregs_arch206(struct kvm_vcpu *vcpu, struct kvm_sregs *sregs) { sregs->u.e.features |= KVM_SREGS_E_ARCH206; sregs->u.e.pir = vcpu->vcpu_id; sregs->u.e.mcsrr0 = vcpu->arch.mcsrr0; sregs->u.e.mcsrr1 = vcpu->arch.mcsrr1; sregs->u.e.decar = vcpu->arch.decar; sregs->u.e.ivpr = vcpu->arch.ivpr; } static int set_sregs_arch206(struct kvm_vcpu *vcpu, struct kvm_sregs *sregs) { if (!(sregs->u.e.features & KVM_SREGS_E_ARCH206)) return 0; if (sregs->u.e.pir != vcpu->vcpu_id) return -EINVAL; vcpu->arch.mcsrr0 = sregs->u.e.mcsrr0; vcpu->arch.mcsrr1 = sregs->u.e.mcsrr1; vcpu->arch.decar = sregs->u.e.decar; vcpu->arch.ivpr = sregs->u.e.ivpr; return 0; } void kvmppc_get_sregs_ivor(struct kvm_vcpu *vcpu, struct kvm_sregs *sregs) { sregs->u.e.features |= KVM_SREGS_E_IVOR; sregs->u.e.ivor_low[0] = vcpu->arch.ivor[BOOKE_IRQPRIO_CRITICAL]; sregs->u.e.ivor_low[1] = vcpu->arch.ivor[BOOKE_IRQPRIO_MACHINE_CHECK]; sregs->u.e.ivor_low[2] = vcpu->arch.ivor[BOOKE_IRQPRIO_DATA_STORAGE]; sregs->u.e.ivor_low[3] = vcpu->arch.ivor[BOOKE_IRQPRIO_INST_STORAGE]; sregs->u.e.ivor_low[4] = vcpu->arch.ivor[BOOKE_IRQPRIO_EXTERNAL]; sregs->u.e.ivor_low[5] = vcpu->arch.ivor[BOOKE_IRQPRIO_ALIGNMENT]; sregs->u.e.ivor_low[6] = vcpu->arch.ivor[BOOKE_IRQPRIO_PROGRAM]; sregs->u.e.ivor_low[7] = vcpu->arch.ivor[BOOKE_IRQPRIO_FP_UNAVAIL]; sregs->u.e.ivor_low[8] = vcpu->arch.ivor[BOOKE_IRQPRIO_SYSCALL]; sregs->u.e.ivor_low[9] = vcpu->arch.ivor[BOOKE_IRQPRIO_AP_UNAVAIL]; sregs->u.e.ivor_low[10] = vcpu->arch.ivor[BOOKE_IRQPRIO_DECREMENTER]; sregs->u.e.ivor_low[11] = vcpu->arch.ivor[BOOKE_IRQPRIO_FIT]; sregs->u.e.ivor_low[12] = vcpu->arch.ivor[BOOKE_IRQPRIO_WATCHDOG]; sregs->u.e.ivor_low[13] = vcpu->arch.ivor[BOOKE_IRQPRIO_DTLB_MISS]; sregs->u.e.ivor_low[14] = vcpu->arch.ivor[BOOKE_IRQPRIO_ITLB_MISS]; sregs->u.e.ivor_low[15] = vcpu->arch.ivor[BOOKE_IRQPRIO_DEBUG]; } int kvmppc_set_sregs_ivor(struct kvm_vcpu *vcpu, struct kvm_sregs *sregs) { if (!(sregs->u.e.features & KVM_SREGS_E_IVOR)) return 0; vcpu->arch.ivor[BOOKE_IRQPRIO_CRITICAL] = sregs->u.e.ivor_low[0]; vcpu->arch.ivor[BOOKE_IRQPRIO_MACHINE_CHECK] = sregs->u.e.ivor_low[1]; vcpu->arch.ivor[BOOKE_IRQPRIO_DATA_STORAGE] = sregs->u.e.ivor_low[2]; vcpu->arch.ivor[BOOKE_IRQPRIO_INST_STORAGE] = sregs->u.e.ivor_low[3]; vcpu->arch.ivor[BOOKE_IRQPRIO_EXTERNAL] = sregs->u.e.ivor_low[4]; vcpu->arch.ivor[BOOKE_IRQPRIO_ALIGNMENT] = sregs->u.e.ivor_low[5]; vcpu->arch.ivor[BOOKE_IRQPRIO_PROGRAM] = sregs->u.e.ivor_low[6]; vcpu->arch.ivor[BOOKE_IRQPRIO_FP_UNAVAIL] = sregs->u.e.ivor_low[7]; vcpu->arch.ivor[BOOKE_IRQPRIO_SYSCALL] = sregs->u.e.ivor_low[8]; vcpu->arch.ivor[BOOKE_IRQPRIO_AP_UNAVAIL] = sregs->u.e.ivor_low[9]; vcpu->arch.ivor[BOOKE_IRQPRIO_DECREMENTER] = sregs->u.e.ivor_low[10]; vcpu->arch.ivor[BOOKE_IRQPRIO_FIT] = sregs->u.e.ivor_low[11]; vcpu->arch.ivor[BOOKE_IRQPRIO_WATCHDOG] = sregs->u.e.ivor_low[12]; vcpu->arch.ivor[BOOKE_IRQPRIO_DTLB_MISS] = sregs->u.e.ivor_low[13]; vcpu->arch.ivor[BOOKE_IRQPRIO_ITLB_MISS] = sregs->u.e.ivor_low[14]; vcpu->arch.ivor[BOOKE_IRQPRIO_DEBUG] = sregs->u.e.ivor_low[15]; return 0; } int kvm_arch_vcpu_ioctl_get_sregs(struct kvm_vcpu *vcpu, struct kvm_sregs *sregs) { sregs->pvr = vcpu->arch.pvr; get_sregs_base(vcpu, sregs); get_sregs_arch206(vcpu, sregs); kvmppc_core_get_sregs(vcpu, sregs); return 0; } int kvm_arch_vcpu_ioctl_set_sregs(struct kvm_vcpu *vcpu, struct kvm_sregs *sregs) { int ret; if (vcpu->arch.pvr != sregs->pvr) return -EINVAL; ret = set_sregs_base(vcpu, sregs); if (ret < 0) return ret; ret = set_sregs_arch206(vcpu, sregs); if (ret < 0) return ret; return kvmppc_core_set_sregs(vcpu, sregs); } int kvm_vcpu_ioctl_get_one_reg(struct kvm_vcpu *vcpu, struct kvm_one_reg *reg) { return -EINVAL; } int kvm_vcpu_ioctl_set_one_reg(struct kvm_vcpu *vcpu, struct kvm_one_reg *reg) { return -EINVAL; } 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) { int r; r = kvmppc_core_vcpu_translate(vcpu, tr); return r; } int kvm_vm_ioctl_get_dirty_log(struct kvm *kvm, struct kvm_dirty_log *log) { return -ENOTSUPP; } int kvmppc_core_prepare_memory_region(struct kvm *kvm, struct kvm_userspace_memory_region *mem) { return 0; } void kvmppc_core_commit_memory_region(struct kvm *kvm, struct kvm_userspace_memory_region *mem) { } void kvmppc_set_tcr(struct kvm_vcpu *vcpu, u32 new_tcr) { vcpu->arch.tcr = new_tcr; update_timer_ints(vcpu); } void kvmppc_set_tsr_bits(struct kvm_vcpu *vcpu, u32 tsr_bits) { set_bits(tsr_bits, &vcpu->arch.tsr); smp_wmb(); kvm_make_request(KVM_REQ_PENDING_TIMER, vcpu); kvm_vcpu_kick(vcpu); } void kvmppc_clr_tsr_bits(struct kvm_vcpu *vcpu, u32 tsr_bits) { clear_bits(tsr_bits, &vcpu->arch.tsr); update_timer_ints(vcpu); } void kvmppc_decrementer_func(unsigned long data) { struct kvm_vcpu *vcpu = (struct kvm_vcpu *)data; kvmppc_set_tsr_bits(vcpu, TSR_DIS); } void kvmppc_booke_vcpu_load(struct kvm_vcpu *vcpu, int cpu) { current->thread.kvm_vcpu = vcpu; } void kvmppc_booke_vcpu_put(struct kvm_vcpu *vcpu) { current->thread.kvm_vcpu = NULL; } int __init kvmppc_booke_init(void) { #ifndef CONFIG_KVM_BOOKE_HV unsigned long ivor[16]; unsigned long max_ivor = 0; int i; /* We install our own exception handlers by hijacking IVPR. IVPR must * be 16-bit aligned, so we need a 64KB allocation. */ kvmppc_booke_handlers = __get_free_pages(GFP_KERNEL | __GFP_ZERO, VCPU_SIZE_ORDER); if (!kvmppc_booke_handlers) return -ENOMEM; /* XXX make sure our handlers are smaller than Linux's */ /* Copy our interrupt handlers to match host IVORs. That way we don't * have to swap the IVORs on every guest/host transition. */ ivor[0] = mfspr(SPRN_IVOR0); ivor[1] = mfspr(SPRN_IVOR1); ivor[2] = mfspr(SPRN_IVOR2); ivor[3] = mfspr(SPRN_IVOR3); ivor[4] = mfspr(SPRN_IVOR4); ivor[5] = mfspr(SPRN_IVOR5); ivor[6] = mfspr(SPRN_IVOR6); ivor[7] = mfspr(SPRN_IVOR7); ivor[8] = mfspr(SPRN_IVOR8); ivor[9] = mfspr(SPRN_IVOR9); ivor[10] = mfspr(SPRN_IVOR10); ivor[11] = mfspr(SPRN_IVOR11); ivor[12] = mfspr(SPRN_IVOR12); ivor[13] = mfspr(SPRN_IVOR13); ivor[14] = mfspr(SPRN_IVOR14); ivor[15] = mfspr(SPRN_IVOR15); for (i = 0; i < 16; i++) { if (ivor[i] > max_ivor) max_ivor = ivor[i]; memcpy((void *)kvmppc_booke_handlers + ivor[i], kvmppc_handlers_start + i * kvmppc_handler_len, kvmppc_handler_len); } flush_icache_range(kvmppc_booke_handlers, kvmppc_booke_handlers + max_ivor + kvmppc_handler_len); #endif /* !BOOKE_HV */ return 0; } void __exit kvmppc_booke_exit(void) { free_pages(kvmppc_booke_handlers, VCPU_SIZE_ORDER); kvm_exit(); }