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Diffstat (limited to '')
| -rw-r--r-- | arch/powerpc/kvm/booke.c | 2209 |
1 files changed, 2209 insertions, 0 deletions
diff --git a/arch/powerpc/kvm/booke.c b/arch/powerpc/kvm/booke.c new file mode 100644 index 000000000..a9ca016da --- /dev/null +++ b/arch/powerpc/kvm/booke.c @@ -0,0 +1,2209 @@ +/* + * 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 <hollisb@us.ibm.com> + * Christian Ehrhardt <ehrhardt@linux.vnet.ibm.com> + * Scott Wood <scottwood@freescale.com> + * Varun Sethi <varun.sethi@freescale.com> + */ + +#include <linux/errno.h> +#include <linux/err.h> +#include <linux/kvm_host.h> +#include <linux/gfp.h> +#include <linux/module.h> +#include <linux/vmalloc.h> +#include <linux/fs.h> + +#include <asm/cputable.h> +#include <linux/uaccess.h> +#include <asm/kvm_ppc.h> +#include <asm/cacheflush.h> +#include <asm/dbell.h> +#include <asm/hw_irq.h> +#include <asm/irq.h> +#include <asm/time.h> + +#include "timing.h" +#include "booke.h" + +#define CREATE_TRACE_POINTS +#include "trace_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) }, + { "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_successful_poll", VCPU_STAT(halt_successful_poll) }, + { "halt_attempted_poll", VCPU_STAT(halt_attempted_poll) }, + { "halt_poll_invalid", VCPU_STAT(halt_poll_invalid) }, + { "halt_wakeup", VCPU_STAT(halt_wakeup) }, + { "doorbell", VCPU_STAT(dbell_exits) }, + { "guest doorbell", VCPU_STAT(gdbell_exits) }, + { "remote_tlb_flush", VM_STAT(remote_tlb_flush) }, + { NULL } +}; + +/* TODO: use vcpu_printf() */ +void kvmppc_dump_vcpu(struct kvm_vcpu *vcpu) +{ + int i; + + printk("pc: %08lx msr: %08llx\n", vcpu->arch.regs.nip, + vcpu->arch.shared->msr); + printk("lr: %08lx ctr: %08lx\n", vcpu->arch.regs.link, + vcpu->arch.regs.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); + disable_kernel_spe(); + 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); + disable_kernel_spe(); + 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 + +/* + * Load up guest vcpu FP state if it's needed. + * It also set the MSR_FP in thread so that host know + * we're holding FPU, and then host can help to save + * guest vcpu FP state if other threads require to use FPU. + * This simulates an FP unavailable fault. + * + * It requires to be called with preemption disabled. + */ +static inline void kvmppc_load_guest_fp(struct kvm_vcpu *vcpu) +{ +#ifdef CONFIG_PPC_FPU + if (!(current->thread.regs->msr & MSR_FP)) { + enable_kernel_fp(); + load_fp_state(&vcpu->arch.fp); + disable_kernel_fp(); + current->thread.fp_save_area = &vcpu->arch.fp; + current->thread.regs->msr |= MSR_FP; + } +#endif +} + +/* + * Save guest vcpu FP state into thread. + * It requires to be called with preemption disabled. + */ +static inline void kvmppc_save_guest_fp(struct kvm_vcpu *vcpu) +{ +#ifdef CONFIG_PPC_FPU + if (current->thread.regs->msr & MSR_FP) + giveup_fpu(current); + current->thread.fp_save_area = NULL; +#endif +} + +static void kvmppc_vcpu_sync_fpu(struct kvm_vcpu *vcpu) +{ +#if defined(CONFIG_PPC_FPU) && !defined(CONFIG_KVM_BOOKE_HV) + /* We always treat the FP bit as enabled from the host + perspective, so only need to adjust the shadow MSR */ + vcpu->arch.shadow_msr &= ~MSR_FP; + vcpu->arch.shadow_msr |= vcpu->arch.shared->msr & MSR_FP; +#endif +} + +/* + * Simulate AltiVec unavailable fault to load guest state + * from thread to AltiVec unit. + * It requires to be called with preemption disabled. + */ +static inline void kvmppc_load_guest_altivec(struct kvm_vcpu *vcpu) +{ +#ifdef CONFIG_ALTIVEC + if (cpu_has_feature(CPU_FTR_ALTIVEC)) { + if (!(current->thread.regs->msr & MSR_VEC)) { + enable_kernel_altivec(); + load_vr_state(&vcpu->arch.vr); + disable_kernel_altivec(); + current->thread.vr_save_area = &vcpu->arch.vr; + current->thread.regs->msr |= MSR_VEC; + } + } +#endif +} + +/* + * Save guest vcpu AltiVec state into thread. + * It requires to be called with preemption disabled. + */ +static inline void kvmppc_save_guest_altivec(struct kvm_vcpu *vcpu) +{ +#ifdef CONFIG_ALTIVEC + if (cpu_has_feature(CPU_FTR_ALTIVEC)) { + if (current->thread.regs->msr & MSR_VEC) + giveup_altivec(current); + current->thread.vr_save_area = NULL; + } +#endif +} + +static void kvmppc_vcpu_sync_debug(struct kvm_vcpu *vcpu) +{ + /* Synchronize guest's desire to get debug interrupts into shadow MSR */ +#ifndef CONFIG_KVM_BOOKE_HV + vcpu->arch.shadow_msr &= ~MSR_DE; + vcpu->arch.shadow_msr |= vcpu->arch.shared->msr & MSR_DE; +#endif + + /* Force enable debug interrupts when user space wants to debug */ + if (vcpu->guest_debug) { +#ifdef CONFIG_KVM_BOOKE_HV + /* + * Since there is no shadow MSR, sync MSR_DE into the guest + * visible MSR. + */ + vcpu->arch.shared->msr |= MSR_DE; +#else + vcpu->arch.shadow_msr |= MSR_DE; + vcpu->arch.shared->msr &= ~MSR_DE; +#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); + kvmppc_vcpu_sync_fpu(vcpu); + kvmppc_vcpu_sync_debug(vcpu); +} + +static void kvmppc_booke_queue_irqprio(struct kvm_vcpu *vcpu, + unsigned int priority) +{ + trace_kvm_booke_queue_irqprio(vcpu, priority); + set_bit(priority, &vcpu->arch.pending_exceptions); +} + +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); +} + +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); +} + +void kvmppc_core_queue_itlb_miss(struct kvm_vcpu *vcpu) +{ + kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_ITLB_MISS); +} + +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); +} + +static void kvmppc_core_queue_alignment(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_ALIGNMENT); +} + +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_fpunavail(struct kvm_vcpu *vcpu) +{ + kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_FP_UNAVAIL); +} + +#ifdef CONFIG_ALTIVEC +void kvmppc_core_queue_vec_unavail(struct kvm_vcpu *vcpu) +{ + kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_ALTIVEC_UNAVAIL); +} +#endif + +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) +{ + clear_bit(BOOKE_IRQPRIO_EXTERNAL, &vcpu->arch.pending_exceptions); + clear_bit(BOOKE_IRQPRIO_EXTERNAL_LEVEL, &vcpu->arch.pending_exceptions); +} + +static void kvmppc_core_queue_watchdog(struct kvm_vcpu *vcpu) +{ + kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_WATCHDOG); +} + +static void kvmppc_core_dequeue_watchdog(struct kvm_vcpu *vcpu) +{ + clear_bit(BOOKE_IRQPRIO_WATCHDOG, &vcpu->arch.pending_exceptions); +} + +void kvmppc_core_queue_debug(struct kvm_vcpu *vcpu) +{ + kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_DEBUG); +} + +void kvmppc_core_dequeue_debug(struct kvm_vcpu *vcpu) +{ + clear_bit(BOOKE_IRQPRIO_DEBUG, &vcpu->arch.pending_exceptions); +} + +static void set_guest_srr(struct kvm_vcpu *vcpu, unsigned long srr0, u32 srr1) +{ + kvmppc_set_srr0(vcpu, srr0); + kvmppc_set_srr1(vcpu, srr1); +} + +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; +} + +/* 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, update_epr = 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; + ulong new_msr = vcpu->arch.shared->msr; + + /* 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; + } + + if ((priority == BOOKE_IRQPRIO_EXTERNAL) && vcpu->arch.epr_flags) + update_epr = true; + + switch (priority) { + case BOOKE_IRQPRIO_DTLB_MISS: + case BOOKE_IRQPRIO_DATA_STORAGE: + case BOOKE_IRQPRIO_ALIGNMENT: + 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: +#ifdef CONFIG_SPE_POSSIBLE + case BOOKE_IRQPRIO_SPE_UNAVAIL: + case BOOKE_IRQPRIO_SPE_FP_DATA: + case BOOKE_IRQPRIO_SPE_FP_ROUND: +#endif +#ifdef CONFIG_ALTIVEC + case BOOKE_IRQPRIO_ALTIVEC_UNAVAIL: + case BOOKE_IRQPRIO_ALTIVEC_ASSIST: +#endif + case BOOKE_IRQPRIO_AP_UNAVAIL: + allowed = 1; + msr_mask = MSR_CE | MSR_ME | MSR_DE; + int_class = INT_CLASS_NONCRIT; + break; + case BOOKE_IRQPRIO_WATCHDOG: + 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; + if (cpu_has_feature(CPU_FTR_DEBUG_LVL_EXC)) + int_class = INT_CLASS_DBG; + else + int_class = INT_CLASS_CRIT; + + break; + } + + if (allowed) { + switch (int_class) { + case INT_CLASS_NONCRIT: + set_guest_srr(vcpu, vcpu->arch.regs.nip, + vcpu->arch.shared->msr); + break; + case INT_CLASS_CRIT: + set_guest_csrr(vcpu, vcpu->arch.regs.nip, + vcpu->arch.shared->msr); + break; + case INT_CLASS_DBG: + set_guest_dsrr(vcpu, vcpu->arch.regs.nip, + vcpu->arch.shared->msr); + break; + case INT_CLASS_MC: + set_guest_mcsrr(vcpu, vcpu->arch.regs.nip, + vcpu->arch.shared->msr); + break; + } + + vcpu->arch.regs.nip = vcpu->arch.ivpr | + vcpu->arch.ivor[priority]; + if (update_esr == true) + kvmppc_set_esr(vcpu, vcpu->arch.queued_esr); + if (update_dear == true) + kvmppc_set_dar(vcpu, vcpu->arch.queued_dear); + if (update_epr == true) { + if (vcpu->arch.epr_flags & KVMPPC_EPR_USER) + kvm_make_request(KVM_REQ_EPR_EXIT, vcpu); + else if (vcpu->arch.epr_flags & KVMPPC_EPR_KERNEL) { + BUG_ON(vcpu->arch.irq_type != KVMPPC_IRQ_MPIC); + kvmppc_mpic_set_epr(vcpu); + } + } + + new_msr &= msr_mask; +#if defined(CONFIG_64BIT) + if (vcpu->arch.epcr & SPRN_EPCR_ICM) + new_msr |= MSR_CM; +#endif + kvmppc_set_msr(vcpu, new_msr); + + 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; +} + +/* + * Return the number of jiffies until the next timeout. If the timeout is + * longer than the NEXT_TIMER_MAX_DELTA, then return NEXT_TIMER_MAX_DELTA + * because the larger value can break the timer APIs. + */ +static unsigned long watchdog_next_timeout(struct kvm_vcpu *vcpu) +{ + u64 tb, wdt_tb, wdt_ticks = 0; + u64 nr_jiffies = 0; + u32 period = TCR_GET_WP(vcpu->arch.tcr); + + wdt_tb = 1ULL << (63 - period); + tb = get_tb(); + /* + * The watchdog timeout will hapeen when TB bit corresponding + * to watchdog will toggle from 0 to 1. + */ + if (tb & wdt_tb) + wdt_ticks = wdt_tb; + + wdt_ticks += wdt_tb - (tb & (wdt_tb - 1)); + + /* Convert timebase ticks to jiffies */ + nr_jiffies = wdt_ticks; + + if (do_div(nr_jiffies, tb_ticks_per_jiffy)) + nr_jiffies++; + + return min_t(unsigned long long, nr_jiffies, NEXT_TIMER_MAX_DELTA); +} + +static void arm_next_watchdog(struct kvm_vcpu *vcpu) +{ + unsigned long nr_jiffies; + unsigned long flags; + + /* + * If TSR_ENW and TSR_WIS are not set then no need to exit to + * userspace, so clear the KVM_REQ_WATCHDOG request. + */ + if ((vcpu->arch.tsr & (TSR_ENW | TSR_WIS)) != (TSR_ENW | TSR_WIS)) + kvm_clear_request(KVM_REQ_WATCHDOG, vcpu); + + spin_lock_irqsave(&vcpu->arch.wdt_lock, flags); + nr_jiffies = watchdog_next_timeout(vcpu); + /* + * If the number of jiffies of watchdog timer >= NEXT_TIMER_MAX_DELTA + * then do not run the watchdog timer as this can break timer APIs. + */ + if (nr_jiffies < NEXT_TIMER_MAX_DELTA) + mod_timer(&vcpu->arch.wdt_timer, jiffies + nr_jiffies); + else + del_timer(&vcpu->arch.wdt_timer); + spin_unlock_irqrestore(&vcpu->arch.wdt_lock, flags); +} + +void kvmppc_watchdog_func(struct timer_list *t) +{ + struct kvm_vcpu *vcpu = from_timer(vcpu, t, arch.wdt_timer); + u32 tsr, new_tsr; + int final; + + do { + new_tsr = tsr = vcpu->arch.tsr; + final = 0; + + /* Time out event */ + if (tsr & TSR_ENW) { + if (tsr & TSR_WIS) + final = 1; + else + new_tsr = tsr | TSR_WIS; + } else { + new_tsr = tsr | TSR_ENW; + } + } while (cmpxchg(&vcpu->arch.tsr, tsr, new_tsr) != tsr); + + if (new_tsr & TSR_WIS) { + smp_wmb(); + kvm_make_request(KVM_REQ_PENDING_TIMER, vcpu); + kvm_vcpu_kick(vcpu); + } + + /* + * If this is final watchdog expiry and some action is required + * then exit to userspace. + */ + if (final && (vcpu->arch.tcr & TCR_WRC_MASK) && + vcpu->arch.watchdog_enabled) { + smp_wmb(); + kvm_make_request(KVM_REQ_WATCHDOG, vcpu); + kvm_vcpu_kick(vcpu); + } + + /* + * Stop running the watchdog timer after final expiration to + * prevent the host from being flooded with timers if the + * guest sets a short period. + * Timers will resume when TSR/TCR is updated next time. + */ + if (!final) + arm_next_watchdog(vcpu); +} + +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); + + if ((vcpu->arch.tcr & TCR_WIE) && (vcpu->arch.tsr & TSR_WIS)) + kvmppc_core_queue_watchdog(vcpu); + else + kvmppc_core_dequeue_watchdog(vcpu); +} + +static void kvmppc_core_check_exceptions(struct kvm_vcpu *vcpu) +{ + unsigned long *pending = &vcpu->arch.pending_exceptions; + unsigned int priority; + + 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 (kvm_request_pending(vcpu)) { + /* Exception delivery raised request; start over */ + return 1; + } + + if (vcpu->arch.shared->msr & MSR_WE) { + local_irq_enable(); + kvm_vcpu_block(vcpu); + kvm_clear_request(KVM_REQ_UNHALT, vcpu); + hard_irq_disable(); + + kvmppc_set_exit_type(vcpu, EMULATED_MTMSRWE_EXITS); + r = 1; + }; + + return r; +} + +int kvmppc_core_check_requests(struct kvm_vcpu *vcpu) +{ + int r = 1; /* Indicate we want to get back into the guest */ + + if (kvm_check_request(KVM_REQ_PENDING_TIMER, vcpu)) + update_timer_ints(vcpu); +#if defined(CONFIG_KVM_E500V2) || defined(CONFIG_KVM_E500MC) + if (kvm_check_request(KVM_REQ_TLB_FLUSH, vcpu)) + kvmppc_core_flush_tlb(vcpu); +#endif + + if (kvm_check_request(KVM_REQ_WATCHDOG, vcpu)) { + vcpu->run->exit_reason = KVM_EXIT_WATCHDOG; + r = 0; + } + + if (kvm_check_request(KVM_REQ_EPR_EXIT, vcpu)) { + vcpu->run->epr.epr = 0; + vcpu->arch.epr_needed = true; + vcpu->run->exit_reason = KVM_EXIT_EPR; + r = 0; + } + + return r; +} + +int kvmppc_vcpu_run(struct kvm_run *kvm_run, struct kvm_vcpu *vcpu) +{ + int ret, s; + struct debug_reg debug; + + if (!vcpu->arch.sane) { + kvm_run->exit_reason = KVM_EXIT_INTERNAL_ERROR; + return -EINVAL; + } + + s = kvmppc_prepare_to_enter(vcpu); + if (s <= 0) { + ret = s; + goto out; + } + /* interrupts now hard-disabled */ + +#ifdef CONFIG_PPC_FPU + /* Save userspace FPU state in stack */ + enable_kernel_fp(); + + /* + * Since we can't trap on MSR_FP in GS-mode, we consider the guest + * as always using the FPU. + */ + kvmppc_load_guest_fp(vcpu); +#endif + +#ifdef CONFIG_ALTIVEC + /* Save userspace AltiVec state in stack */ + if (cpu_has_feature(CPU_FTR_ALTIVEC)) + enable_kernel_altivec(); + /* + * Since we can't trap on MSR_VEC in GS-mode, we consider the guest + * as always using the AltiVec. + */ + kvmppc_load_guest_altivec(vcpu); +#endif + + /* Switch to guest debug context */ + debug = vcpu->arch.dbg_reg; + switch_booke_debug_regs(&debug); + debug = current->thread.debug; + current->thread.debug = vcpu->arch.dbg_reg; + + vcpu->arch.pgdir = current->mm->pgd; + kvmppc_fix_ee_before_entry(); + + ret = __kvmppc_vcpu_run(kvm_run, vcpu); + + /* No need for guest_exit. It's done in handle_exit. + We also get here with interrupts enabled. */ + + /* Switch back to user space debug context */ + switch_booke_debug_regs(&debug); + current->thread.debug = debug; + +#ifdef CONFIG_PPC_FPU + kvmppc_save_guest_fp(vcpu); +#endif + +#ifdef CONFIG_ALTIVEC + kvmppc_save_guest_altivec(vcpu); +#endif + +out: + vcpu->mode = OUTSIDE_GUEST_MODE; + 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_AGAIN: + return RESUME_GUEST; + + case EMULATE_FAIL: + printk(KERN_CRIT "%s: emulation at %lx failed (%08x)\n", + __func__, vcpu->arch.regs.nip, 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; + + case EMULATE_EXIT_USER: + return RESUME_HOST; + + default: + BUG(); + } +} + +static int kvmppc_handle_debug(struct kvm_run *run, struct kvm_vcpu *vcpu) +{ + struct debug_reg *dbg_reg = &(vcpu->arch.dbg_reg); + u32 dbsr = vcpu->arch.dbsr; + + if (vcpu->guest_debug == 0) { + /* + * Debug resources belong to Guest. + * Imprecise debug event is not injected + */ + if (dbsr & DBSR_IDE) { + dbsr &= ~DBSR_IDE; + if (!dbsr) + return RESUME_GUEST; + } + + if (dbsr && (vcpu->arch.shared->msr & MSR_DE) && + (vcpu->arch.dbg_reg.dbcr0 & DBCR0_IDM)) + kvmppc_core_queue_debug(vcpu); + + /* Inject a program interrupt if trap debug is not allowed */ + if ((dbsr & DBSR_TIE) && !(vcpu->arch.shared->msr & MSR_DE)) + kvmppc_core_queue_program(vcpu, ESR_PTR); + + return RESUME_GUEST; + } + + /* + * Debug resource owned by userspace. + * Clear guest dbsr (vcpu->arch.dbsr) + */ + vcpu->arch.dbsr = 0; + run->debug.arch.status = 0; + run->debug.arch.address = vcpu->arch.regs.nip; + + if (dbsr & (DBSR_IAC1 | DBSR_IAC2 | DBSR_IAC3 | DBSR_IAC4)) { + run->debug.arch.status |= KVMPPC_DEBUG_BREAKPOINT; + } else { + if (dbsr & (DBSR_DAC1W | DBSR_DAC2W)) + run->debug.arch.status |= KVMPPC_DEBUG_WATCH_WRITE; + else if (dbsr & (DBSR_DAC1R | DBSR_DAC2R)) + run->debug.arch.status |= KVMPPC_DEBUG_WATCH_READ; + if (dbsr & (DBSR_DAC1R | DBSR_DAC1W)) + run->debug.arch.address = dbg_reg->dac1; + else if (dbsr & (DBSR_DAC2R | DBSR_DAC2W)) + run->debug.arch.address = dbg_reg->dac2; + } + + return RESUME_HOST; +} + +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; +} + +/* + * For interrupts needed to be handled by host interrupt handlers, + * corresponding host handler are called from here in similar way + * (but not exact) as they are called from low level handler + * (such as from arch/powerpc/kernel/head_fsl_booke.S). + */ +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_DOORBELL) + 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; + case BOOKE_INTERRUPT_WATCHDOG: + kvmppc_fill_pt_regs(®s); +#ifdef CONFIG_BOOKE_WDT + WatchdogException(®s); +#else + unknown_exception(®s); +#endif + break; + case BOOKE_INTERRUPT_CRITICAL: + kvmppc_fill_pt_regs(®s); + unknown_exception(®s); + break; + case BOOKE_INTERRUPT_DEBUG: + /* Save DBSR before preemption is enabled */ + vcpu->arch.dbsr = mfspr(SPRN_DBSR); + kvmppc_clear_dbsr(); + break; + } +} + +static int kvmppc_resume_inst_load(struct kvm_run *run, struct kvm_vcpu *vcpu, + enum emulation_result emulated, u32 last_inst) +{ + switch (emulated) { + case EMULATE_AGAIN: + return RESUME_GUEST; + + case EMULATE_FAIL: + pr_debug("%s: load instruction from guest address %lx failed\n", + __func__, vcpu->arch.regs.nip); + /* For debugging, encode the failing instruction and + * report it to userspace. */ + run->hw.hardware_exit_reason = ~0ULL << 32; + run->hw.hardware_exit_reason |= last_inst; + kvmppc_core_queue_program(vcpu, ESR_PIL); + return RESUME_HOST; + + default: + BUG(); + } +} + +/** + * 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; + int s; + int idx; + u32 last_inst = KVM_INST_FETCH_FAILED; + enum emulation_result emulated = EMULATE_DONE; + + /* 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); + + /* + * get last instruction before being preempted + * TODO: for e6500 check also BOOKE_INTERRUPT_LRAT_ERROR & ESR_DATA + */ + switch (exit_nr) { + case BOOKE_INTERRUPT_DATA_STORAGE: + case BOOKE_INTERRUPT_DTLB_MISS: + case BOOKE_INTERRUPT_HV_PRIV: + emulated = kvmppc_get_last_inst(vcpu, INST_GENERIC, &last_inst); + break; + case BOOKE_INTERRUPT_PROGRAM: + /* SW breakpoints arrive as illegal instructions on HV */ + if (vcpu->guest_debug & KVM_GUESTDBG_USE_SW_BP) + emulated = kvmppc_get_last_inst(vcpu, INST_GENERIC, &last_inst); + break; + default: + break; + } + + trace_kvm_exit(exit_nr, vcpu); + guest_exit_irqoff(); + + local_irq_enable(); + + run->exit_reason = KVM_EXIT_UNKNOWN; + run->ready_for_interrupt_injection = 1; + + if (emulated != EMULATE_DONE) { + r = kvmppc_resume_inst_load(run, vcpu, emulated, last_inst); + goto out; + } + + 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_WATCHDOG: + 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->guest_debug & KVM_GUESTDBG_USE_SW_BP) && + (last_inst == KVMPPC_INST_SW_BREAKPOINT)) { + /* + * We are here because of an SW breakpoint instr, + * so lets return to host to handle. + */ + r = kvmppc_handle_debug(run, vcpu); + run->exit_reason = KVM_EXIT_DEBUG; + kvmppc_account_exit(vcpu, DEBUG_EXITS); + break; + } + + 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; +#elif defined(CONFIG_SPE_POSSIBLE) + 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.regs.nip); + run->hw.hardware_exit_reason = exit_nr; + r = RESUME_HOST; + break; +#endif /* CONFIG_SPE_POSSIBLE */ + +/* + * On cores with Vector category, KVM is loaded only if CONFIG_ALTIVEC, + * see kvmppc_core_check_processor_compat(). + */ +#ifdef CONFIG_ALTIVEC + case BOOKE_INTERRUPT_ALTIVEC_UNAVAIL: + kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_ALTIVEC_UNAVAIL); + r = RESUME_GUEST; + break; + + case BOOKE_INTERRUPT_ALTIVEC_ASSIST: + kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_ALTIVEC_ASSIST); + r = RESUME_GUEST; + 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; + + case BOOKE_INTERRUPT_ALIGNMENT: + kvmppc_core_queue_alignment(vcpu, vcpu->arch.fault_dear, + vcpu->arch.fault_esr); + 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; + } + + idx = srcu_read_lock(&vcpu->kvm->srcu); + + 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; + vcpu->arch.vaddr_accessed = eaddr; + r = kvmppc_emulate_mmio(run, vcpu); + kvmppc_account_exit(vcpu, MMIO_EXITS); + } + + srcu_read_unlock(&vcpu->kvm->srcu, idx); + break; + } + + case BOOKE_INTERRUPT_ITLB_MISS: { + unsigned long eaddr = vcpu->arch.regs.nip; + 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); + + idx = srcu_read_lock(&vcpu->kvm->srcu); + + 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); + } + + srcu_read_unlock(&vcpu->kvm->srcu, idx); + break; + } + + case BOOKE_INTERRUPT_DEBUG: { + r = kvmppc_handle_debug(run, vcpu); + if (r == RESUME_HOST) + run->exit_reason = KVM_EXIT_DEBUG; + kvmppc_account_exit(vcpu, DEBUG_EXITS); + break; + } + + default: + printk(KERN_EMERG "exit_nr %d\n", exit_nr); + BUG(); + } + +out: + /* + * 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)) { + s = kvmppc_prepare_to_enter(vcpu); + if (s <= 0) + r = (s << 2) | RESUME_HOST | (r & RESUME_FLAG_NV); + else { + /* interrupts now hard-disabled */ + kvmppc_fix_ee_before_entry(); + kvmppc_load_guest_fp(vcpu); + kvmppc_load_guest_altivec(vcpu); + } + } + + return r; +} + +static void kvmppc_set_tsr(struct kvm_vcpu *vcpu, u32 new_tsr) +{ + u32 old_tsr = vcpu->arch.tsr; + + vcpu->arch.tsr = new_tsr; + + if ((old_tsr ^ vcpu->arch.tsr) & (TSR_ENW | TSR_WIS)) + arm_next_watchdog(vcpu); + + update_timer_ints(vcpu); +} + +/* 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.regs.nip = 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_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 kvmppc_subarch_vcpu_init(struct kvm_vcpu *vcpu) +{ + /* setup watchdog timer once */ + spin_lock_init(&vcpu->arch.wdt_lock); + timer_setup(&vcpu->arch.wdt_timer, kvmppc_watchdog_func, 0); + + /* + * Clear DBSR.MRR to avoid guest debug interrupt as + * this is of host interest + */ + mtspr(SPRN_DBSR, DBSR_MRR); + return 0; +} + +void kvmppc_subarch_vcpu_uninit(struct kvm_vcpu *vcpu) +{ + del_timer_sync(&vcpu->arch.wdt_timer); +} + +int kvm_arch_vcpu_ioctl_get_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs) +{ + int i; + + vcpu_load(vcpu); + + regs->pc = vcpu->arch.regs.nip; + regs->cr = kvmppc_get_cr(vcpu); + regs->ctr = vcpu->arch.regs.ctr; + regs->lr = vcpu->arch.regs.link; + regs->xer = kvmppc_get_xer(vcpu); + regs->msr = vcpu->arch.shared->msr; + regs->srr0 = kvmppc_get_srr0(vcpu); + regs->srr1 = kvmppc_get_srr1(vcpu); + regs->pid = vcpu->arch.pid; + regs->sprg0 = kvmppc_get_sprg0(vcpu); + regs->sprg1 = kvmppc_get_sprg1(vcpu); + regs->sprg2 = kvmppc_get_sprg2(vcpu); + regs->sprg3 = kvmppc_get_sprg3(vcpu); + regs->sprg4 = kvmppc_get_sprg4(vcpu); + regs->sprg5 = kvmppc_get_sprg5(vcpu); + regs->sprg6 = kvmppc_get_sprg6(vcpu); + regs->sprg7 = kvmppc_get_sprg7(vcpu); + + for (i = 0; i < ARRAY_SIZE(regs->gpr); i++) + regs->gpr[i] = kvmppc_get_gpr(vcpu, i); + + vcpu_put(vcpu); + return 0; +} + +int kvm_arch_vcpu_ioctl_set_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs) +{ + int i; + + vcpu_load(vcpu); + + vcpu->arch.regs.nip = regs->pc; + kvmppc_set_cr(vcpu, regs->cr); + vcpu->arch.regs.ctr = regs->ctr; + vcpu->arch.regs.link = regs->lr; + kvmppc_set_xer(vcpu, regs->xer); + kvmppc_set_msr(vcpu, regs->msr); + kvmppc_set_srr0(vcpu, regs->srr0); + kvmppc_set_srr1(vcpu, regs->srr1); + kvmppc_set_pid(vcpu, regs->pid); + kvmppc_set_sprg0(vcpu, regs->sprg0); + kvmppc_set_sprg1(vcpu, regs->sprg1); + kvmppc_set_sprg2(vcpu, regs->sprg2); + kvmppc_set_sprg3(vcpu, regs->sprg3); + kvmppc_set_sprg4(vcpu, regs->sprg4); + kvmppc_set_sprg5(vcpu, regs->sprg5); + kvmppc_set_sprg6(vcpu, regs->sprg6); + kvmppc_set_sprg7(vcpu, regs->sprg7); + + for (i = 0; i < ARRAY_SIZE(regs->gpr); i++) + kvmppc_set_gpr(vcpu, i, regs->gpr[i]); + + vcpu_put(vcpu); + 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 = kvmppc_get_esr(vcpu); + sregs->u.e.dear = kvmppc_get_dar(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; + kvmppc_set_esr(vcpu, sregs->u.e.esr); + kvmppc_set_dar(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) + kvmppc_set_tsr(vcpu, sregs->u.e.tsr); + + 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; +} + +int 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]; + return 0; +} + +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) +{ + int ret; + + vcpu_load(vcpu); + + sregs->pvr = vcpu->arch.pvr; + + get_sregs_base(vcpu, sregs); + get_sregs_arch206(vcpu, sregs); + ret = vcpu->kvm->arch.kvm_ops->get_sregs(vcpu, sregs); + + vcpu_put(vcpu); + return ret; +} + +int kvm_arch_vcpu_ioctl_set_sregs(struct kvm_vcpu *vcpu, + struct kvm_sregs *sregs) +{ + int ret = -EINVAL; + + vcpu_load(vcpu); + if (vcpu->arch.pvr != sregs->pvr) + goto out; + + ret = set_sregs_base(vcpu, sregs); + if (ret < 0) + goto out; + + ret = set_sregs_arch206(vcpu, sregs); + if (ret < 0) + goto out; + + ret = vcpu->kvm->arch.kvm_ops->set_sregs(vcpu, sregs); + +out: + vcpu_put(vcpu); + return ret; +} + +int kvmppc_get_one_reg(struct kvm_vcpu *vcpu, u64 id, + union kvmppc_one_reg *val) +{ + int r = 0; + + switch (id) { + case KVM_REG_PPC_IAC1: + *val = get_reg_val(id, vcpu->arch.dbg_reg.iac1); + break; + case KVM_REG_PPC_IAC2: + *val = get_reg_val(id, vcpu->arch.dbg_reg.iac2); + break; +#if CONFIG_PPC_ADV_DEBUG_IACS > 2 + case KVM_REG_PPC_IAC3: + *val = get_reg_val(id, vcpu->arch.dbg_reg.iac3); + break; + case KVM_REG_PPC_IAC4: + *val = get_reg_val(id, vcpu->arch.dbg_reg.iac4); + break; +#endif + case KVM_REG_PPC_DAC1: + *val = get_reg_val(id, vcpu->arch.dbg_reg.dac1); + break; + case KVM_REG_PPC_DAC2: + *val = get_reg_val(id, vcpu->arch.dbg_reg.dac2); + break; + case KVM_REG_PPC_EPR: { + u32 epr = kvmppc_get_epr(vcpu); + *val = get_reg_val(id, epr); + break; + } +#if defined(CONFIG_64BIT) + case KVM_REG_PPC_EPCR: + *val = get_reg_val(id, vcpu->arch.epcr); + break; +#endif + case KVM_REG_PPC_TCR: + *val = get_reg_val(id, vcpu->arch.tcr); + break; + case KVM_REG_PPC_TSR: + *val = get_reg_val(id, vcpu->arch.tsr); + break; + case KVM_REG_PPC_DEBUG_INST: + *val = get_reg_val(id, KVMPPC_INST_SW_BREAKPOINT); + break; + case KVM_REG_PPC_VRSAVE: + *val = get_reg_val(id, vcpu->arch.vrsave); + break; + default: + r = vcpu->kvm->arch.kvm_ops->get_one_reg(vcpu, id, val); + break; + } + + return r; +} + +int kvmppc_set_one_reg(struct kvm_vcpu *vcpu, u64 id, + union kvmppc_one_reg *val) +{ + int r = 0; + + switch (id) { + case KVM_REG_PPC_IAC1: + vcpu->arch.dbg_reg.iac1 = set_reg_val(id, *val); + break; + case KVM_REG_PPC_IAC2: + vcpu->arch.dbg_reg.iac2 = set_reg_val(id, *val); + break; +#if CONFIG_PPC_ADV_DEBUG_IACS > 2 + case KVM_REG_PPC_IAC3: + vcpu->arch.dbg_reg.iac3 = set_reg_val(id, *val); + break; + case KVM_REG_PPC_IAC4: + vcpu->arch.dbg_reg.iac4 = set_reg_val(id, *val); + break; +#endif + case KVM_REG_PPC_DAC1: + vcpu->arch.dbg_reg.dac1 = set_reg_val(id, *val); + break; + case KVM_REG_PPC_DAC2: + vcpu->arch.dbg_reg.dac2 = set_reg_val(id, *val); + break; + case KVM_REG_PPC_EPR: { + u32 new_epr = set_reg_val(id, *val); + kvmppc_set_epr(vcpu, new_epr); + break; + } +#if defined(CONFIG_64BIT) + case KVM_REG_PPC_EPCR: { + u32 new_epcr = set_reg_val(id, *val); + kvmppc_set_epcr(vcpu, new_epcr); + break; + } +#endif + case KVM_REG_PPC_OR_TSR: { + u32 tsr_bits = set_reg_val(id, *val); + kvmppc_set_tsr_bits(vcpu, tsr_bits); + break; + } + case KVM_REG_PPC_CLEAR_TSR: { + u32 tsr_bits = set_reg_val(id, *val); + kvmppc_clr_tsr_bits(vcpu, tsr_bits); + break; + } + case KVM_REG_PPC_TSR: { + u32 tsr = set_reg_val(id, *val); + kvmppc_set_tsr(vcpu, tsr); + break; + } + case KVM_REG_PPC_TCR: { + u32 tcr = set_reg_val(id, *val); + kvmppc_set_tcr(vcpu, tcr); + break; + } + case KVM_REG_PPC_VRSAVE: + vcpu->arch.vrsave = set_reg_val(id, *val); + break; + default: + r = vcpu->kvm->arch.kvm_ops->set_one_reg(vcpu, id, val); + break; + } + + return r; +} + +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; + + vcpu_load(vcpu); + r = kvmppc_core_vcpu_translate(vcpu, tr); + vcpu_put(vcpu); + return r; +} + +int kvm_vm_ioctl_get_dirty_log(struct kvm *kvm, struct kvm_dirty_log *log) +{ + return -ENOTSUPP; +} + +void kvmppc_core_free_memslot(struct kvm *kvm, struct kvm_memory_slot *free, + struct kvm_memory_slot *dont) +{ +} + +int kvmppc_core_create_memslot(struct kvm *kvm, struct kvm_memory_slot *slot, + unsigned long npages) +{ + return 0; +} + +int kvmppc_core_prepare_memory_region(struct kvm *kvm, + struct kvm_memory_slot *memslot, + const struct kvm_userspace_memory_region *mem) +{ + return 0; +} + +void kvmppc_core_commit_memory_region(struct kvm *kvm, + const struct kvm_userspace_memory_region *mem, + const struct kvm_memory_slot *old, + const struct kvm_memory_slot *new) +{ +} + +void kvmppc_core_flush_memslot(struct kvm *kvm, struct kvm_memory_slot *memslot) +{ +} + +void kvmppc_set_epcr(struct kvm_vcpu *vcpu, u32 new_epcr) +{ +#if defined(CONFIG_64BIT) + vcpu->arch.epcr = new_epcr; +#ifdef CONFIG_KVM_BOOKE_HV + vcpu->arch.shadow_epcr &= ~SPRN_EPCR_GICM; + if (vcpu->arch.epcr & SPRN_EPCR_ICM) + vcpu->arch.shadow_epcr |= SPRN_EPCR_GICM; +#endif +#endif +} + +void kvmppc_set_tcr(struct kvm_vcpu *vcpu, u32 new_tcr) +{ + vcpu->arch.tcr = new_tcr; + arm_next_watchdog(vcpu); + 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); + + /* + * We may have stopped the watchdog due to + * being stuck on final expiration. + */ + if (tsr_bits & (TSR_ENW | TSR_WIS)) + arm_next_watchdog(vcpu); + + update_timer_ints(vcpu); +} + +void kvmppc_decrementer_func(struct kvm_vcpu *vcpu) +{ + if (vcpu->arch.tcr & TCR_ARE) { + vcpu->arch.dec = vcpu->arch.decar; + kvmppc_emulate_dec(vcpu); + } + + kvmppc_set_tsr_bits(vcpu, TSR_DIS); +} + +static int kvmppc_booke_add_breakpoint(struct debug_reg *dbg_reg, + uint64_t addr, int index) +{ + switch (index) { + case 0: + dbg_reg->dbcr0 |= DBCR0_IAC1; + dbg_reg->iac1 = addr; + break; + case 1: + dbg_reg->dbcr0 |= DBCR0_IAC2; + dbg_reg->iac2 = addr; + break; +#if CONFIG_PPC_ADV_DEBUG_IACS > 2 + case 2: + dbg_reg->dbcr0 |= DBCR0_IAC3; + dbg_reg->iac3 = addr; + break; + case 3: + dbg_reg->dbcr0 |= DBCR0_IAC4; + dbg_reg->iac4 = addr; + break; +#endif + default: + return -EINVAL; + } + + dbg_reg->dbcr0 |= DBCR0_IDM; + return 0; +} + +static int kvmppc_booke_add_watchpoint(struct debug_reg *dbg_reg, uint64_t addr, + int type, int index) +{ + switch (index) { + case 0: + if (type & KVMPPC_DEBUG_WATCH_READ) + dbg_reg->dbcr0 |= DBCR0_DAC1R; + if (type & KVMPPC_DEBUG_WATCH_WRITE) + dbg_reg->dbcr0 |= DBCR0_DAC1W; + dbg_reg->dac1 = addr; + break; + case 1: + if (type & KVMPPC_DEBUG_WATCH_READ) + dbg_reg->dbcr0 |= DBCR0_DAC2R; + if (type & KVMPPC_DEBUG_WATCH_WRITE) + dbg_reg->dbcr0 |= DBCR0_DAC2W; + dbg_reg->dac2 = addr; + break; + default: + return -EINVAL; + } + + dbg_reg->dbcr0 |= DBCR0_IDM; + return 0; +} +void kvm_guest_protect_msr(struct kvm_vcpu *vcpu, ulong prot_bitmap, bool set) +{ + /* XXX: Add similar MSR protection for BookE-PR */ +#ifdef CONFIG_KVM_BOOKE_HV + BUG_ON(prot_bitmap & ~(MSRP_UCLEP | MSRP_DEP | MSRP_PMMP)); + if (set) { + if (prot_bitmap & MSR_UCLE) + vcpu->arch.shadow_msrp |= MSRP_UCLEP; + if (prot_bitmap & MSR_DE) + vcpu->arch.shadow_msrp |= MSRP_DEP; + if (prot_bitmap & MSR_PMM) + vcpu->arch.shadow_msrp |= MSRP_PMMP; + } else { + if (prot_bitmap & MSR_UCLE) + vcpu->arch.shadow_msrp &= ~MSRP_UCLEP; + if (prot_bitmap & MSR_DE) + vcpu->arch.shadow_msrp &= ~MSRP_DEP; + if (prot_bitmap & MSR_PMM) + vcpu->arch.shadow_msrp &= ~MSRP_PMMP; + } +#endif +} + +int kvmppc_xlate(struct kvm_vcpu *vcpu, ulong eaddr, enum xlate_instdata xlid, + enum xlate_readwrite xlrw, struct kvmppc_pte *pte) +{ + int gtlb_index; + gpa_t gpaddr; + +#ifdef CONFIG_KVM_E500V2 + if (!(vcpu->arch.shared->msr & MSR_PR) && + (eaddr & PAGE_MASK) == vcpu->arch.magic_page_ea) { + pte->eaddr = eaddr; + pte->raddr = (vcpu->arch.magic_page_pa & PAGE_MASK) | + (eaddr & ~PAGE_MASK); + pte->vpage = eaddr >> PAGE_SHIFT; + pte->may_read = true; + pte->may_write = true; + pte->may_execute = true; + + return 0; + } +#endif + + /* Check the guest TLB. */ + switch (xlid) { + case XLATE_INST: + gtlb_index = kvmppc_mmu_itlb_index(vcpu, eaddr); + break; + case XLATE_DATA: + gtlb_index = kvmppc_mmu_dtlb_index(vcpu, eaddr); + break; + default: + BUG(); + } + + /* Do we have a TLB entry at all? */ + if (gtlb_index < 0) + return -ENOENT; + + gpaddr = kvmppc_mmu_xlate(vcpu, gtlb_index, eaddr); + + pte->eaddr = eaddr; + pte->raddr = (gpaddr & PAGE_MASK) | (eaddr & ~PAGE_MASK); + pte->vpage = eaddr >> PAGE_SHIFT; + + /* XXX read permissions from the guest TLB */ + pte->may_read = true; + pte->may_write = true; + pte->may_execute = true; + + return 0; +} + +int kvm_arch_vcpu_ioctl_set_guest_debug(struct kvm_vcpu *vcpu, + struct kvm_guest_debug *dbg) +{ + struct debug_reg *dbg_reg; + int n, b = 0, w = 0; + int ret = 0; + + vcpu_load(vcpu); + + if (!(dbg->control & KVM_GUESTDBG_ENABLE)) { + vcpu->arch.dbg_reg.dbcr0 = 0; + vcpu->guest_debug = 0; + kvm_guest_protect_msr(vcpu, MSR_DE, false); + goto out; + } + + kvm_guest_protect_msr(vcpu, MSR_DE, true); + vcpu->guest_debug = dbg->control; + vcpu->arch.dbg_reg.dbcr0 = 0; + + if (vcpu->guest_debug & KVM_GUESTDBG_SINGLESTEP) + vcpu->arch.dbg_reg.dbcr0 |= DBCR0_IDM | DBCR0_IC; + + /* Code below handles only HW breakpoints */ + dbg_reg = &(vcpu->arch.dbg_reg); + +#ifdef CONFIG_KVM_BOOKE_HV + /* + * On BookE-HV (e500mc) the guest is always executed with MSR.GS=1 + * DBCR1 and DBCR2 are set to trigger debug events when MSR.PR is 0 + */ + dbg_reg->dbcr1 = 0; + dbg_reg->dbcr2 = 0; +#else + /* + * On BookE-PR (e500v2) the guest is always executed with MSR.PR=1 + * We set DBCR1 and DBCR2 to only trigger debug events when MSR.PR + * is set. + */ + dbg_reg->dbcr1 = DBCR1_IAC1US | DBCR1_IAC2US | DBCR1_IAC3US | + DBCR1_IAC4US; + dbg_reg->dbcr2 = DBCR2_DAC1US | DBCR2_DAC2US; +#endif + + if (!(vcpu->guest_debug & KVM_GUESTDBG_USE_HW_BP)) + goto out; + + ret = -EINVAL; + for (n = 0; n < (KVMPPC_BOOKE_IAC_NUM + KVMPPC_BOOKE_DAC_NUM); n++) { + uint64_t addr = dbg->arch.bp[n].addr; + uint32_t type = dbg->arch.bp[n].type; + + if (type == KVMPPC_DEBUG_NONE) + continue; + + if (type & ~(KVMPPC_DEBUG_WATCH_READ | + KVMPPC_DEBUG_WATCH_WRITE | + KVMPPC_DEBUG_BREAKPOINT)) + goto out; + + if (type & KVMPPC_DEBUG_BREAKPOINT) { + /* Setting H/W breakpoint */ + if (kvmppc_booke_add_breakpoint(dbg_reg, addr, b++)) + goto out; + } else { + /* Setting H/W watchpoint */ + if (kvmppc_booke_add_watchpoint(dbg_reg, addr, + type, w++)) + goto out; + } + } + + ret = 0; +out: + vcpu_put(vcpu); + return ret; +} + +void kvmppc_booke_vcpu_load(struct kvm_vcpu *vcpu, int cpu) +{ + vcpu->cpu = smp_processor_id(); + current->thread.kvm_vcpu = vcpu; +} + +void kvmppc_booke_vcpu_put(struct kvm_vcpu *vcpu) +{ + current->thread.kvm_vcpu = NULL; + vcpu->cpu = -1; + + /* Clear pending debug event in DBSR */ + kvmppc_clear_dbsr(); +} + +void kvmppc_mmu_destroy(struct kvm_vcpu *vcpu) +{ + vcpu->kvm->arch.kvm_ops->mmu_destroy(vcpu); +} + +int kvmppc_core_init_vm(struct kvm *kvm) +{ + return kvm->arch.kvm_ops->init_vm(kvm); +} + +struct kvm_vcpu *kvmppc_core_vcpu_create(struct kvm *kvm, unsigned int id) +{ + return kvm->arch.kvm_ops->vcpu_create(kvm, id); +} + +void kvmppc_core_vcpu_free(struct kvm_vcpu *vcpu) +{ + vcpu->kvm->arch.kvm_ops->vcpu_free(vcpu); +} + +void kvmppc_core_destroy_vm(struct kvm *kvm) +{ + kvm->arch.kvm_ops->destroy_vm(kvm); +} + +void kvmppc_core_vcpu_load(struct kvm_vcpu *vcpu, int cpu) +{ + vcpu->kvm->arch.kvm_ops->vcpu_load(vcpu, cpu); +} + +void kvmppc_core_vcpu_put(struct kvm_vcpu *vcpu) +{ + vcpu->kvm->arch.kvm_ops->vcpu_put(vcpu); +} + +int __init kvmppc_booke_init(void) +{ +#ifndef CONFIG_KVM_BOOKE_HV + unsigned long ivor[16]; + unsigned long *handler = kvmppc_booke_handler_addr; + unsigned long max_ivor = 0; + unsigned long handler_len; + 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 = i; + + handler_len = handler[i + 1] - handler[i]; + memcpy((void *)kvmppc_booke_handlers + ivor[i], + (void *)handler[i], handler_len); + } + + handler_len = handler[max_ivor + 1] - handler[max_ivor]; + flush_icache_range(kvmppc_booke_handlers, kvmppc_booke_handlers + + ivor[max_ivor] + handler_len); +#endif /* !BOOKE_HV */ + return 0; +} + +void __exit kvmppc_booke_exit(void) +{ + free_pages(kvmppc_booke_handlers, VCPU_SIZE_ORDER); + kvm_exit(); +} |