--- /dev/null
+/*
+ * 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"
+
+#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_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
+
+/*
+ * 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);
+ 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);
+ 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_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.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)
+ 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))
+ 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);
+ 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 kvm_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.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 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.pc;
+
+ 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:
+ 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.pc);
+ /* 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 beeing 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;
+ }
+
+ local_irq_enable();
+
+ trace_kvm_exit(exit_nr, vcpu);
+ kvm_guest_exit();
+
+ 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.pc);
+ 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.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);
+
+ 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.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_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);
+
+ /*
+ * 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;
+
+ 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 = 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);
+
+ 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);
+ 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]);
+
+ 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)
+{
+ sregs->pvr = vcpu->arch.pvr;
+
+ get_sregs_base(vcpu, sregs);
+ get_sregs_arch206(vcpu, sregs);
+ return vcpu->kvm->arch.kvm_ops->get_sregs(vcpu, sregs);
+}
+
+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 vcpu->kvm->arch.kvm_ops->set_sregs(vcpu, sregs);
+}
+
+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;
+
+ 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 *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,
+ 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(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;
+
+ if (!(dbg->control & KVM_GUESTDBG_ENABLE)) {
+ vcpu->arch.dbg_reg.dbcr0 = 0;
+ vcpu->guest_debug = 0;
+ kvm_guest_protect_msr(vcpu, MSR_DE, false);
+ return 0;
+ }
+
+ 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))
+ return 0;
+
+ 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))
+ return -EINVAL;
+
+ if (type & KVMPPC_DEBUG_BREAKPOINT) {
+ /* Setting H/W breakpoint */
+ if (kvmppc_booke_add_breakpoint(dbg_reg, addr, b++))
+ return -EINVAL;
+ } else {
+ /* Setting H/W watchpoint */
+ if (kvmppc_booke_add_watchpoint(dbg_reg, addr,
+ type, w++))
+ return -EINVAL;
+ }
+ }
+
+ return 0;
+}
+
+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();
+}
Code Review / kvmfornfv.git / blobdiff