| /* |
| * 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 <asm/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" |
| #include "trace.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) }, |
| { "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.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 |
| |
| 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 |
| } |
| |
| /* |
| * 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); |
| } |
| |
| 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); |
| } |
| |
| 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); |
| } |
| |
| 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_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); |
| } |
| |
| 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 |
| } |
| |
| static unsigned long get_guest_epr(struct kvm_vcpu *vcpu) |
| { |
| #ifdef CONFIG_KVM_BOOKE_HV |
| return mfspr(SPRN_GEPR); |
| #else |
| return vcpu->arch.epr; |
| #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, 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_enabled) |
| 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: |
| case BOOKE_IRQPRIO_SPE_UNAVAIL: |
| case BOOKE_IRQPRIO_SPE_FP_DATA: |
| case BOOKE_IRQPRIO_SPE_FP_ROUND: |
| 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; |
| 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); |
| if (update_epr == true) |
| kvm_make_request(KVM_REQ_EPR_EXIT, 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)) |
| clear_bit(KVM_REQ_WATCHDOG, &vcpu->requests); |
| |
| 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(unsigned long data) |
| { |
| struct kvm_vcpu *vcpu = (struct kvm_vcpu *)data; |
| 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 (vcpu->requests) { |
| /* Exception delivery raised request; start over */ |
| return 1; |
| } |
| |
| if (vcpu->arch.shared->msr & MSR_WE) { |
| local_irq_enable(); |
| kvm_vcpu_block(vcpu); |
| clear_bit(KVM_REQ_UNHALT, &vcpu->requests); |
| local_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; |
| #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(); |
| s = kvmppc_prepare_to_enter(vcpu); |
| if (s <= 0) { |
| local_irq_enable(); |
| ret = s; |
| goto out; |
| } |
| kvmppc_lazy_ee_enable(); |
| |
| 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); |
| |
| /* No need for kvm_guest_exit. It's done in handle_exit. |
| We also get here with interrupts enabled. */ |
| |
| #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 |
| |
| 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_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; |
| |
| case EMULATE_EXIT_USER: |
| 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; |
| } |
| |
| /* |
| * 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_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; |
| 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: |
| unknown_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; |
| int s; |
| |
| /* 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(); |
| |
| trace_kvm_exit(exit_nr, vcpu); |
| kvm_guest_exit(); |
| |
| 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_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->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; |
| |
| 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; |
| } |
| |
| 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); |
| } |
| |
| 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(); |
| s = kvmppc_prepare_to_enter(vcpu); |
| if (s <= 0) { |
| local_irq_enable(); |
| r = (s << 2) | RESUME_HOST | (r & RESUME_FLAG_NV); |
| } else { |
| kvmppc_lazy_ee_enable(); |
| } |
| } |
| |
| 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.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 kvmppc_subarch_vcpu_init(struct kvm_vcpu *vcpu) |
| { |
| /* setup watchdog timer once */ |
| spin_lock_init(&vcpu->arch.wdt_lock); |
| setup_timer(&vcpu->arch.wdt_timer, kvmppc_watchdog_func, |
| (unsigned long)vcpu); |
| |
| 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; |
| |
| 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) |
| 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; |
| } |
| |
| 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) |
| { |
| int r = -EINVAL; |
| |
| switch (reg->id) { |
| case KVM_REG_PPC_IAC1: |
| case KVM_REG_PPC_IAC2: |
| case KVM_REG_PPC_IAC3: |
| case KVM_REG_PPC_IAC4: { |
| int iac = reg->id - KVM_REG_PPC_IAC1; |
| r = copy_to_user((u64 __user *)(long)reg->addr, |
| &vcpu->arch.dbg_reg.iac[iac], sizeof(u64)); |
| break; |
| } |
| case KVM_REG_PPC_DAC1: |
| case KVM_REG_PPC_DAC2: { |
| int dac = reg->id - KVM_REG_PPC_DAC1; |
| r = copy_to_user((u64 __user *)(long)reg->addr, |
| &vcpu->arch.dbg_reg.dac[dac], sizeof(u64)); |
| break; |
| } |
| case KVM_REG_PPC_EPR: { |
| u32 epr = get_guest_epr(vcpu); |
| r = put_user(epr, (u32 __user *)(long)reg->addr); |
| break; |
| } |
| #if defined(CONFIG_64BIT) |
| case KVM_REG_PPC_EPCR: |
| r = put_user(vcpu->arch.epcr, (u32 __user *)(long)reg->addr); |
| break; |
| #endif |
| case KVM_REG_PPC_TCR: |
| r = put_user(vcpu->arch.tcr, (u32 __user *)(long)reg->addr); |
| break; |
| case KVM_REG_PPC_TSR: |
| r = put_user(vcpu->arch.tsr, (u32 __user *)(long)reg->addr); |
| break; |
| case KVM_REG_PPC_DEBUG_INST: { |
| u32 opcode = KVMPPC_INST_EHPRIV; |
| r = copy_to_user((u32 __user *)(long)reg->addr, |
| &opcode, sizeof(u32)); |
| break; |
| } |
| default: |
| break; |
| } |
| return r; |
| } |
| |
| int kvm_vcpu_ioctl_set_one_reg(struct kvm_vcpu *vcpu, struct kvm_one_reg *reg) |
| { |
| int r = -EINVAL; |
| |
| switch (reg->id) { |
| case KVM_REG_PPC_IAC1: |
| case KVM_REG_PPC_IAC2: |
| case KVM_REG_PPC_IAC3: |
| case KVM_REG_PPC_IAC4: { |
| int iac = reg->id - KVM_REG_PPC_IAC1; |
| r = copy_from_user(&vcpu->arch.dbg_reg.iac[iac], |
| (u64 __user *)(long)reg->addr, sizeof(u64)); |
| break; |
| } |
| case KVM_REG_PPC_DAC1: |
| case KVM_REG_PPC_DAC2: { |
| int dac = reg->id - KVM_REG_PPC_DAC1; |
| r = copy_from_user(&vcpu->arch.dbg_reg.dac[dac], |
| (u64 __user *)(long)reg->addr, sizeof(u64)); |
| break; |
| } |
| case KVM_REG_PPC_EPR: { |
| u32 new_epr; |
| r = get_user(new_epr, (u32 __user *)(long)reg->addr); |
| if (!r) |
| kvmppc_set_epr(vcpu, new_epr); |
| break; |
| } |
| #if defined(CONFIG_64BIT) |
| case KVM_REG_PPC_EPCR: { |
| u32 new_epcr; |
| r = get_user(new_epcr, (u32 __user *)(long)reg->addr); |
| if (r == 0) |
| kvmppc_set_epcr(vcpu, new_epcr); |
| break; |
| } |
| #endif |
| case KVM_REG_PPC_OR_TSR: { |
| u32 tsr_bits; |
| r = get_user(tsr_bits, (u32 __user *)(long)reg->addr); |
| kvmppc_set_tsr_bits(vcpu, tsr_bits); |
| break; |
| } |
| case KVM_REG_PPC_CLEAR_TSR: { |
| u32 tsr_bits; |
| r = get_user(tsr_bits, (u32 __user *)(long)reg->addr); |
| kvmppc_clr_tsr_bits(vcpu, tsr_bits); |
| break; |
| } |
| case KVM_REG_PPC_TSR: { |
| u32 tsr; |
| r = get_user(tsr, (u32 __user *)(long)reg->addr); |
| kvmppc_set_tsr(vcpu, tsr); |
| break; |
| } |
| case KVM_REG_PPC_TCR: { |
| u32 tcr; |
| r = get_user(tcr, (u32 __user *)(long)reg->addr); |
| kvmppc_set_tcr(vcpu, tcr); |
| break; |
| } |
| default: |
| break; |
| } |
| return r; |
| } |
| |
| int kvm_arch_vcpu_ioctl_set_guest_debug(struct kvm_vcpu *vcpu, |
| struct kvm_guest_debug *dbg) |
| { |
| 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; |
| } |
| |
| void kvmppc_core_free_memslot(struct kvm_memory_slot *free, |
| struct kvm_memory_slot *dont) |
| { |
| } |
| |
| int kvmppc_core_create_memslot(struct kvm_memory_slot *slot, |
| unsigned long npages) |
| { |
| return 0; |
| } |
| |
| int kvmppc_core_prepare_memory_region(struct kvm *kvm, |
| struct kvm_memory_slot *memslot, |
| struct kvm_userspace_memory_region *mem) |
| { |
| return 0; |
| } |
| |
| void kvmppc_core_commit_memory_region(struct kvm *kvm, |
| struct kvm_userspace_memory_region *mem, |
| const struct kvm_memory_slot *old) |
| { |
| } |
| |
| 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(unsigned long data) |
| { |
| struct kvm_vcpu *vcpu = (struct kvm_vcpu *)data; |
| |
| if (vcpu->arch.tcr & TCR_ARE) { |
| vcpu->arch.dec = vcpu->arch.decar; |
| kvmppc_emulate_dec(vcpu); |
| } |
| |
| kvmppc_set_tsr_bits(vcpu, TSR_DIS); |
| } |
| |
| 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; |
| } |
| |
| 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(); |
| } |