diff options
Diffstat (limited to 'ANDROID_3.4.5/arch/powerpc/kvm/booke.c')
| -rw-r--r-- | ANDROID_3.4.5/arch/powerpc/kvm/booke.c | 1023 |
1 files changed, 0 insertions, 1023 deletions
diff --git a/ANDROID_3.4.5/arch/powerpc/kvm/booke.c b/ANDROID_3.4.5/arch/powerpc/kvm/booke.c deleted file mode 100644 index ee9e1ee9..00000000 --- a/ANDROID_3.4.5/arch/powerpc/kvm/booke.c +++ /dev/null @@ -1,1023 +0,0 @@ -/* - * 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> - */ - -#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 "timing.h" -#include <asm/cacheflush.h> - -#include "booke.h" - -unsigned long kvmppc_booke_handlers; - -#define VM_STAT(x) offsetof(struct kvm, stat.x), KVM_STAT_VM -#define VCPU_STAT(x) offsetof(struct kvm_vcpu, stat.x), KVM_STAT_VCPU - -struct kvm_stats_debugfs_item debugfs_entries[] = { - { "mmio", VCPU_STAT(mmio_exits) }, - { "dcr", VCPU_STAT(dcr_exits) }, - { "sig", VCPU_STAT(signal_exits) }, - { "itlb_r", VCPU_STAT(itlb_real_miss_exits) }, - { "itlb_v", VCPU_STAT(itlb_virt_miss_exits) }, - { "dtlb_r", VCPU_STAT(dtlb_real_miss_exits) }, - { "dtlb_v", VCPU_STAT(dtlb_virt_miss_exits) }, - { "sysc", VCPU_STAT(syscall_exits) }, - { "isi", VCPU_STAT(isi_exits) }, - { "dsi", VCPU_STAT(dsi_exits) }, - { "inst_emu", VCPU_STAT(emulated_inst_exits) }, - { "dec", VCPU_STAT(dec_exits) }, - { "ext_intr", VCPU_STAT(ext_intr_exits) }, - { "halt_wakeup", VCPU_STAT(halt_wakeup) }, - { NULL } -}; - -/* TODO: use vcpu_printf() */ -void kvmppc_dump_vcpu(struct kvm_vcpu *vcpu) -{ - int i; - - printk("pc: %08lx msr: %08llx\n", vcpu->arch.pc, vcpu->arch.shared->msr); - printk("lr: %08lx ctr: %08lx\n", vcpu->arch.lr, vcpu->arch.ctr); - printk("srr0: %08llx srr1: %08llx\n", vcpu->arch.shared->srr0, - vcpu->arch.shared->srr1); - - printk("exceptions: %08lx\n", vcpu->arch.pending_exceptions); - - for (i = 0; i < 32; i += 4) { - printk("gpr%02d: %08lx %08lx %08lx %08lx\n", i, - kvmppc_get_gpr(vcpu, i), - kvmppc_get_gpr(vcpu, i+1), - kvmppc_get_gpr(vcpu, i+2), - kvmppc_get_gpr(vcpu, i+3)); - } -} - -#ifdef CONFIG_SPE -void kvmppc_vcpu_disable_spe(struct kvm_vcpu *vcpu) -{ - preempt_disable(); - enable_kernel_spe(); - kvmppc_save_guest_spe(vcpu); - vcpu->arch.shadow_msr &= ~MSR_SPE; - preempt_enable(); -} - -static void kvmppc_vcpu_enable_spe(struct kvm_vcpu *vcpu) -{ - preempt_disable(); - enable_kernel_spe(); - kvmppc_load_guest_spe(vcpu); - vcpu->arch.shadow_msr |= MSR_SPE; - preempt_enable(); -} - -static void kvmppc_vcpu_sync_spe(struct kvm_vcpu *vcpu) -{ - if (vcpu->arch.shared->msr & MSR_SPE) { - if (!(vcpu->arch.shadow_msr & MSR_SPE)) - kvmppc_vcpu_enable_spe(vcpu); - } else if (vcpu->arch.shadow_msr & MSR_SPE) { - kvmppc_vcpu_disable_spe(vcpu); - } -} -#else -static void kvmppc_vcpu_sync_spe(struct kvm_vcpu *vcpu) -{ -} -#endif - -/* - * Helper function for "full" MSR writes. No need to call this if only - * EE/CE/ME/DE/RI are changing. - */ -void kvmppc_set_msr(struct kvm_vcpu *vcpu, u32 new_msr) -{ - u32 old_msr = vcpu->arch.shared->msr; - - vcpu->arch.shared->msr = new_msr; - - kvmppc_mmu_msr_notify(vcpu, old_msr); - kvmppc_vcpu_sync_spe(vcpu); -} - -static void kvmppc_booke_queue_irqprio(struct kvm_vcpu *vcpu, - unsigned int priority) -{ - set_bit(priority, &vcpu->arch.pending_exceptions); -} - -static void kvmppc_core_queue_dtlb_miss(struct kvm_vcpu *vcpu, - ulong dear_flags, ulong esr_flags) -{ - vcpu->arch.queued_dear = dear_flags; - vcpu->arch.queued_esr = esr_flags; - kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_DTLB_MISS); -} - -static void kvmppc_core_queue_data_storage(struct kvm_vcpu *vcpu, - ulong dear_flags, ulong esr_flags) -{ - vcpu->arch.queued_dear = dear_flags; - vcpu->arch.queued_esr = esr_flags; - kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_DATA_STORAGE); -} - -static void kvmppc_core_queue_inst_storage(struct kvm_vcpu *vcpu, - ulong esr_flags) -{ - vcpu->arch.queued_esr = esr_flags; - kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_INST_STORAGE); -} - -void kvmppc_core_queue_program(struct kvm_vcpu *vcpu, ulong esr_flags) -{ - vcpu->arch.queued_esr = esr_flags; - kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_PROGRAM); -} - -void kvmppc_core_queue_dec(struct kvm_vcpu *vcpu) -{ - kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_DECREMENTER); -} - -int kvmppc_core_pending_dec(struct kvm_vcpu *vcpu) -{ - return test_bit(BOOKE_IRQPRIO_DECREMENTER, &vcpu->arch.pending_exceptions); -} - -void kvmppc_core_dequeue_dec(struct kvm_vcpu *vcpu) -{ - clear_bit(BOOKE_IRQPRIO_DECREMENTER, &vcpu->arch.pending_exceptions); -} - -void kvmppc_core_queue_external(struct kvm_vcpu *vcpu, - struct kvm_interrupt *irq) -{ - unsigned int prio = BOOKE_IRQPRIO_EXTERNAL; - - if (irq->irq == KVM_INTERRUPT_SET_LEVEL) - prio = BOOKE_IRQPRIO_EXTERNAL_LEVEL; - - kvmppc_booke_queue_irqprio(vcpu, prio); -} - -void kvmppc_core_dequeue_external(struct kvm_vcpu *vcpu, - struct kvm_interrupt *irq) -{ - clear_bit(BOOKE_IRQPRIO_EXTERNAL, &vcpu->arch.pending_exceptions); - clear_bit(BOOKE_IRQPRIO_EXTERNAL_LEVEL, &vcpu->arch.pending_exceptions); -} - -/* 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 uninitialized_var(msr_mask); - bool update_esr = false, update_dear = false; - ulong crit_raw = vcpu->arch.shared->critical; - ulong crit_r1 = kvmppc_get_gpr(vcpu, 1); - bool crit; - bool keep_irq = false; - - /* Truncate crit indicators in 32 bit mode */ - if (!(vcpu->arch.shared->msr & MSR_SF)) { - crit_raw &= 0xffffffff; - crit_r1 &= 0xffffffff; - } - - /* Critical section when crit == r1 */ - crit = (crit_raw == crit_r1); - /* ... and we're in supervisor mode */ - crit = crit && !(vcpu->arch.shared->msr & MSR_PR); - - if (priority == BOOKE_IRQPRIO_EXTERNAL_LEVEL) { - priority = BOOKE_IRQPRIO_EXTERNAL; - keep_irq = true; - } - - switch (priority) { - case BOOKE_IRQPRIO_DTLB_MISS: - case BOOKE_IRQPRIO_DATA_STORAGE: - update_dear = true; - /* fall through */ - case BOOKE_IRQPRIO_INST_STORAGE: - case BOOKE_IRQPRIO_PROGRAM: - update_esr = true; - /* fall through */ - case BOOKE_IRQPRIO_ITLB_MISS: - case BOOKE_IRQPRIO_SYSCALL: - case BOOKE_IRQPRIO_FP_UNAVAIL: - case BOOKE_IRQPRIO_SPE_UNAVAIL: - case BOOKE_IRQPRIO_SPE_FP_DATA: - case BOOKE_IRQPRIO_SPE_FP_ROUND: - case BOOKE_IRQPRIO_AP_UNAVAIL: - case BOOKE_IRQPRIO_ALIGNMENT: - allowed = 1; - msr_mask = MSR_CE|MSR_ME|MSR_DE; - break; - case BOOKE_IRQPRIO_CRITICAL: - case BOOKE_IRQPRIO_WATCHDOG: - allowed = vcpu->arch.shared->msr & MSR_CE; - msr_mask = MSR_ME; - break; - case BOOKE_IRQPRIO_MACHINE_CHECK: - allowed = vcpu->arch.shared->msr & MSR_ME; - msr_mask = 0; - break; - case BOOKE_IRQPRIO_DECREMENTER: - case BOOKE_IRQPRIO_FIT: - keep_irq = true; - /* fall through */ - case BOOKE_IRQPRIO_EXTERNAL: - allowed = vcpu->arch.shared->msr & MSR_EE; - allowed = allowed && !crit; - msr_mask = MSR_CE|MSR_ME|MSR_DE; - break; - case BOOKE_IRQPRIO_DEBUG: - allowed = vcpu->arch.shared->msr & MSR_DE; - msr_mask = MSR_ME; - break; - } - - if (allowed) { - vcpu->arch.shared->srr0 = vcpu->arch.pc; - vcpu->arch.shared->srr1 = vcpu->arch.shared->msr; - vcpu->arch.pc = vcpu->arch.ivpr | vcpu->arch.ivor[priority]; - if (update_esr == true) - vcpu->arch.shared->esr = vcpu->arch.queued_esr; - if (update_dear == true) - vcpu->arch.shared->dar = vcpu->arch.queued_dear; - kvmppc_set_msr(vcpu, vcpu->arch.shared->msr & msr_mask); - - if (!keep_irq) - clear_bit(priority, &vcpu->arch.pending_exceptions); - } - - return allowed; -} - -static void update_timer_ints(struct kvm_vcpu *vcpu) -{ - if ((vcpu->arch.tcr & TCR_DIE) && (vcpu->arch.tsr & TSR_DIS)) - kvmppc_core_queue_dec(vcpu); - else - kvmppc_core_dequeue_dec(vcpu); -} - -static void kvmppc_core_check_exceptions(struct kvm_vcpu *vcpu) -{ - unsigned long *pending = &vcpu->arch.pending_exceptions; - unsigned int priority; - - if (vcpu->requests) { - if (kvm_check_request(KVM_REQ_PENDING_TIMER, vcpu)) { - smp_mb(); - update_timer_ints(vcpu); - } - } - - priority = __ffs(*pending); - while (priority <= BOOKE_IRQPRIO_MAX) { - if (kvmppc_booke_irqprio_deliver(vcpu, priority)) - break; - - priority = find_next_bit(pending, - BITS_PER_BYTE * sizeof(*pending), - priority + 1); - } - - /* Tell the guest about our interrupt status */ - vcpu->arch.shared->int_pending = !!*pending; -} - -/* Check pending exceptions and deliver one, if possible. */ -void kvmppc_core_prepare_to_enter(struct kvm_vcpu *vcpu) -{ - WARN_ON_ONCE(!irqs_disabled()); - - kvmppc_core_check_exceptions(vcpu); - - if (vcpu->arch.shared->msr & MSR_WE) { - local_irq_enable(); - kvm_vcpu_block(vcpu); - local_irq_disable(); - - kvmppc_set_exit_type(vcpu, EMULATED_MTMSRWE_EXITS); - kvmppc_core_check_exceptions(vcpu); - }; -} - -int kvmppc_vcpu_run(struct kvm_run *kvm_run, struct kvm_vcpu *vcpu) -{ - int ret; - - if (!vcpu->arch.sane) { - kvm_run->exit_reason = KVM_EXIT_INTERNAL_ERROR; - return -EINVAL; - } - - local_irq_disable(); - - kvmppc_core_prepare_to_enter(vcpu); - - if (signal_pending(current)) { - kvm_run->exit_reason = KVM_EXIT_INTR; - ret = -EINTR; - goto out; - } - - kvm_guest_enter(); - ret = __kvmppc_vcpu_run(kvm_run, vcpu); - kvm_guest_exit(); - -out: - local_irq_enable(); - return ret; -} - -/** - * 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) -{ - enum emulation_result er; - int r = RESUME_HOST; - - /* update before a new last_exit_type is rewritten */ - kvmppc_update_timing_stats(vcpu); - - local_irq_enable(); - - run->exit_reason = KVM_EXIT_UNKNOWN; - run->ready_for_interrupt_injection = 1; - - switch (exit_nr) { - case BOOKE_INTERRUPT_MACHINE_CHECK: - printk("MACHINE CHECK: %lx\n", mfspr(SPRN_MCSR)); - kvmppc_dump_vcpu(vcpu); - r = RESUME_HOST; - break; - - case BOOKE_INTERRUPT_EXTERNAL: - kvmppc_account_exit(vcpu, EXT_INTR_EXITS); - if (need_resched()) - cond_resched(); - r = RESUME_GUEST; - break; - - case BOOKE_INTERRUPT_DECREMENTER: - /* Since we switched IVPR back to the host's value, the host - * handled this interrupt the moment we enabled interrupts. - * Now we just offer it a chance to reschedule the guest. */ - kvmppc_account_exit(vcpu, DEC_EXITS); - if (need_resched()) - cond_resched(); - r = RESUME_GUEST; - break; - - case BOOKE_INTERRUPT_PROGRAM: - if (vcpu->arch.shared->msr & MSR_PR) { - /* Program traps generated by user-level software must be handled - * by the guest kernel. */ - kvmppc_core_queue_program(vcpu, vcpu->arch.fault_esr); - r = RESUME_GUEST; - kvmppc_account_exit(vcpu, USR_PR_INST); - break; - } - - 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. */ - r = RESUME_GUEST_NV; - break; - case EMULATE_DO_DCR: - run->exit_reason = KVM_EXIT_DCR; - r = RESUME_HOST; - break; - case EMULATE_FAIL: - /* XXX Deliver Program interrupt to guest. */ - 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; - r = RESUME_HOST; - break; - default: - BUG(); - } - 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_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; - - case BOOKE_INTERRUPT_DTLB_MISS: { - unsigned long eaddr = vcpu->arch.fault_dear; - int gtlb_index; - gpa_t gpaddr; - gfn_t gfn; - -#ifdef CONFIG_KVM_E500 - if (!(vcpu->arch.shared->msr & MSR_PR) && - (eaddr & PAGE_MASK) == vcpu->arch.magic_page_ea) { - kvmppc_map_magic(vcpu); - kvmppc_account_exit(vcpu, DTLB_VIRT_MISS_EXITS); - r = RESUME_GUEST; - - break; - } -#endif - - /* Check the guest TLB. */ - gtlb_index = kvmppc_mmu_dtlb_index(vcpu, eaddr); - if (gtlb_index < 0) { - /* The guest didn't have a mapping for it. */ - kvmppc_core_queue_dtlb_miss(vcpu, - vcpu->arch.fault_dear, - vcpu->arch.fault_esr); - kvmppc_mmu_dtlb_miss(vcpu); - kvmppc_account_exit(vcpu, DTLB_REAL_MISS_EXITS); - r = RESUME_GUEST; - break; - } - - gpaddr = kvmppc_mmu_xlate(vcpu, gtlb_index, eaddr); - gfn = gpaddr >> PAGE_SHIFT; - - if (kvm_is_visible_gfn(vcpu->kvm, gfn)) { - /* The guest TLB had a mapping, but the shadow TLB - * didn't, and it is RAM. This could be because: - * a) the entry is mapping the host kernel, or - * b) the guest used a large mapping which we're faking - * Either way, we need to satisfy the fault without - * invoking the guest. */ - kvmppc_mmu_map(vcpu, eaddr, gpaddr, gtlb_index); - kvmppc_account_exit(vcpu, DTLB_VIRT_MISS_EXITS); - r = RESUME_GUEST; - } else { - /* Guest has mapped and accessed a page which is not - * actually RAM. */ - vcpu->arch.paddr_accessed = gpaddr; - r = kvmppc_emulate_mmio(run, vcpu); - kvmppc_account_exit(vcpu, MMIO_EXITS); - } - - break; - } - - case BOOKE_INTERRUPT_ITLB_MISS: { - unsigned long eaddr = vcpu->arch.pc; - gpa_t gpaddr; - gfn_t gfn; - int gtlb_index; - - r = RESUME_GUEST; - - /* Check the guest TLB. */ - gtlb_index = kvmppc_mmu_itlb_index(vcpu, eaddr); - if (gtlb_index < 0) { - /* The guest didn't have a mapping for it. */ - kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_ITLB_MISS); - kvmppc_mmu_itlb_miss(vcpu); - kvmppc_account_exit(vcpu, ITLB_REAL_MISS_EXITS); - break; - } - - kvmppc_account_exit(vcpu, ITLB_VIRT_MISS_EXITS); - - gpaddr = kvmppc_mmu_xlate(vcpu, gtlb_index, eaddr); - gfn = gpaddr >> PAGE_SHIFT; - - if (kvm_is_visible_gfn(vcpu->kvm, gfn)) { - /* The guest TLB had a mapping, but the shadow TLB - * didn't. This could be because: - * a) the entry is mapping the host kernel, or - * b) the guest used a large mapping which we're faking - * Either way, we need to satisfy the fault without - * invoking the guest. */ - kvmppc_mmu_map(vcpu, eaddr, gpaddr, gtlb_index); - } else { - /* Guest mapped and leaped at non-RAM! */ - kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_MACHINE_CHECK); - } - - break; - } - - case BOOKE_INTERRUPT_DEBUG: { - u32 dbsr; - - vcpu->arch.pc = mfspr(SPRN_CSRR0); - - /* clear IAC events in DBSR register */ - dbsr = mfspr(SPRN_DBSR); - dbsr &= DBSR_IAC1 | DBSR_IAC2 | DBSR_IAC3 | DBSR_IAC4; - mtspr(SPRN_DBSR, dbsr); - - run->exit_reason = KVM_EXIT_DEBUG; - kvmppc_account_exit(vcpu, DEBUG_EXITS); - r = RESUME_HOST; - break; - } - - default: - printk(KERN_EMERG "exit_nr %d\n", exit_nr); - BUG(); - } - - local_irq_disable(); - - kvmppc_core_prepare_to_enter(vcpu); - - if (!(r & RESUME_HOST)) { - /* To avoid clobbering exit_reason, only check for signals if - * we aren't already exiting to userspace for some other - * reason. */ - if (signal_pending(current)) { - run->exit_reason = KVM_EXIT_INTR; - r = (-EINTR << 2) | RESUME_HOST | (r & RESUME_FLAG_NV); - kvmppc_account_exit(vcpu, SIGNAL_EXITS); - } - } - - return r; -} - -/* Initial guest state: 16MB mapping 0 -> 0, PC = 0, MSR = 0, R1 = 16MB */ -int kvm_arch_vcpu_setup(struct kvm_vcpu *vcpu) -{ - int i; - int r; - - vcpu->arch.pc = 0; - vcpu->arch.shared->msr = 0; - vcpu->arch.shadow_msr = MSR_USER | MSR_DE | MSR_IS | MSR_DS; - vcpu->arch.shared->pir = vcpu->vcpu_id; - kvmppc_set_gpr(vcpu, 1, (16<<20) - 8); /* -8 for the callee-save LR slot */ - - vcpu->arch.shadow_pid = 1; - - /* Eye-catching numbers so we know if the guest takes an interrupt - * before it's programmed its own IVPR/IVORs. */ - vcpu->arch.ivpr = 0x55550000; - for (i = 0; i < BOOKE_IRQPRIO_MAX; i++) - vcpu->arch.ivor[i] = 0x7700 | i * 4; - - kvmppc_init_timing_stats(vcpu); - - r = kvmppc_core_vcpu_setup(vcpu); - kvmppc_sanity_check(vcpu); - return r; -} - -int kvm_arch_vcpu_ioctl_get_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs) -{ - int i; - - regs->pc = vcpu->arch.pc; - regs->cr = kvmppc_get_cr(vcpu); - regs->ctr = vcpu->arch.ctr; - regs->lr = vcpu->arch.lr; - regs->xer = kvmppc_get_xer(vcpu); - regs->msr = vcpu->arch.shared->msr; - regs->srr0 = vcpu->arch.shared->srr0; - regs->srr1 = vcpu->arch.shared->srr1; - regs->pid = vcpu->arch.pid; - regs->sprg0 = vcpu->arch.shared->sprg0; - regs->sprg1 = vcpu->arch.shared->sprg1; - regs->sprg2 = vcpu->arch.shared->sprg2; - regs->sprg3 = vcpu->arch.shared->sprg3; - regs->sprg4 = vcpu->arch.shared->sprg4; - regs->sprg5 = vcpu->arch.shared->sprg5; - regs->sprg6 = vcpu->arch.shared->sprg6; - regs->sprg7 = vcpu->arch.shared->sprg7; - - for (i = 0; i < ARRAY_SIZE(regs->gpr); i++) - regs->gpr[i] = kvmppc_get_gpr(vcpu, i); - - return 0; -} - -int kvm_arch_vcpu_ioctl_set_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs) -{ - int i; - - vcpu->arch.pc = regs->pc; - kvmppc_set_cr(vcpu, regs->cr); - vcpu->arch.ctr = regs->ctr; - vcpu->arch.lr = regs->lr; - kvmppc_set_xer(vcpu, regs->xer); - kvmppc_set_msr(vcpu, regs->msr); - vcpu->arch.shared->srr0 = regs->srr0; - vcpu->arch.shared->srr1 = regs->srr1; - kvmppc_set_pid(vcpu, regs->pid); - vcpu->arch.shared->sprg0 = regs->sprg0; - vcpu->arch.shared->sprg1 = regs->sprg1; - vcpu->arch.shared->sprg2 = regs->sprg2; - vcpu->arch.shared->sprg3 = regs->sprg3; - vcpu->arch.shared->sprg4 = regs->sprg4; - vcpu->arch.shared->sprg5 = regs->sprg5; - vcpu->arch.shared->sprg6 = regs->sprg6; - vcpu->arch.shared->sprg7 = regs->sprg7; - - for (i = 0; i < ARRAY_SIZE(regs->gpr); i++) - kvmppc_set_gpr(vcpu, i, regs->gpr[i]); - - return 0; -} - -static void get_sregs_base(struct kvm_vcpu *vcpu, - struct kvm_sregs *sregs) -{ - u64 tb = get_tb(); - - sregs->u.e.features |= KVM_SREGS_E_BASE; - - sregs->u.e.csrr0 = vcpu->arch.csrr0; - sregs->u.e.csrr1 = vcpu->arch.csrr1; - sregs->u.e.mcsr = vcpu->arch.mcsr; - sregs->u.e.esr = vcpu->arch.shared->esr; - sregs->u.e.dear = vcpu->arch.shared->dar; - 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; - vcpu->arch.shared->esr = sregs->u.e.esr; - vcpu->arch.shared->dar = sregs->u.e.dear; - vcpu->arch.vrsave = sregs->u.e.vrsave; - kvmppc_set_tcr(vcpu, sregs->u.e.tcr); - - if (sregs->u.e.update_special & KVM_SREGS_E_UPDATE_DEC) { - vcpu->arch.dec = sregs->u.e.dec; - kvmppc_emulate_dec(vcpu); - } - - if (sregs->u.e.update_special & KVM_SREGS_E_UPDATE_TSR) { - vcpu->arch.tsr = sregs->u.e.tsr; - update_timer_ints(vcpu); - } - - return 0; -} - -static void get_sregs_arch206(struct kvm_vcpu *vcpu, - struct kvm_sregs *sregs) -{ - sregs->u.e.features |= KVM_SREGS_E_ARCH206; - - sregs->u.e.pir = vcpu->vcpu_id; - sregs->u.e.mcsrr0 = vcpu->arch.mcsrr0; - sregs->u.e.mcsrr1 = vcpu->arch.mcsrr1; - sregs->u.e.decar = vcpu->arch.decar; - sregs->u.e.ivpr = vcpu->arch.ivpr; -} - -static int set_sregs_arch206(struct kvm_vcpu *vcpu, - struct kvm_sregs *sregs) -{ - if (!(sregs->u.e.features & KVM_SREGS_E_ARCH206)) - return 0; - - if (sregs->u.e.pir != vcpu->vcpu_id) - return -EINVAL; - - vcpu->arch.mcsrr0 = sregs->u.e.mcsrr0; - vcpu->arch.mcsrr1 = sregs->u.e.mcsrr1; - vcpu->arch.decar = sregs->u.e.decar; - vcpu->arch.ivpr = sregs->u.e.ivpr; - - return 0; -} - -void kvmppc_get_sregs_ivor(struct kvm_vcpu *vcpu, struct kvm_sregs *sregs) -{ - sregs->u.e.features |= KVM_SREGS_E_IVOR; - - sregs->u.e.ivor_low[0] = vcpu->arch.ivor[BOOKE_IRQPRIO_CRITICAL]; - sregs->u.e.ivor_low[1] = vcpu->arch.ivor[BOOKE_IRQPRIO_MACHINE_CHECK]; - sregs->u.e.ivor_low[2] = vcpu->arch.ivor[BOOKE_IRQPRIO_DATA_STORAGE]; - sregs->u.e.ivor_low[3] = vcpu->arch.ivor[BOOKE_IRQPRIO_INST_STORAGE]; - sregs->u.e.ivor_low[4] = vcpu->arch.ivor[BOOKE_IRQPRIO_EXTERNAL]; - sregs->u.e.ivor_low[5] = vcpu->arch.ivor[BOOKE_IRQPRIO_ALIGNMENT]; - sregs->u.e.ivor_low[6] = vcpu->arch.ivor[BOOKE_IRQPRIO_PROGRAM]; - sregs->u.e.ivor_low[7] = vcpu->arch.ivor[BOOKE_IRQPRIO_FP_UNAVAIL]; - sregs->u.e.ivor_low[8] = vcpu->arch.ivor[BOOKE_IRQPRIO_SYSCALL]; - sregs->u.e.ivor_low[9] = vcpu->arch.ivor[BOOKE_IRQPRIO_AP_UNAVAIL]; - sregs->u.e.ivor_low[10] = vcpu->arch.ivor[BOOKE_IRQPRIO_DECREMENTER]; - sregs->u.e.ivor_low[11] = vcpu->arch.ivor[BOOKE_IRQPRIO_FIT]; - sregs->u.e.ivor_low[12] = vcpu->arch.ivor[BOOKE_IRQPRIO_WATCHDOG]; - sregs->u.e.ivor_low[13] = vcpu->arch.ivor[BOOKE_IRQPRIO_DTLB_MISS]; - sregs->u.e.ivor_low[14] = vcpu->arch.ivor[BOOKE_IRQPRIO_ITLB_MISS]; - sregs->u.e.ivor_low[15] = vcpu->arch.ivor[BOOKE_IRQPRIO_DEBUG]; -} - -int kvmppc_set_sregs_ivor(struct kvm_vcpu *vcpu, struct kvm_sregs *sregs) -{ - if (!(sregs->u.e.features & KVM_SREGS_E_IVOR)) - return 0; - - vcpu->arch.ivor[BOOKE_IRQPRIO_CRITICAL] = sregs->u.e.ivor_low[0]; - vcpu->arch.ivor[BOOKE_IRQPRIO_MACHINE_CHECK] = sregs->u.e.ivor_low[1]; - vcpu->arch.ivor[BOOKE_IRQPRIO_DATA_STORAGE] = sregs->u.e.ivor_low[2]; - vcpu->arch.ivor[BOOKE_IRQPRIO_INST_STORAGE] = sregs->u.e.ivor_low[3]; - vcpu->arch.ivor[BOOKE_IRQPRIO_EXTERNAL] = sregs->u.e.ivor_low[4]; - vcpu->arch.ivor[BOOKE_IRQPRIO_ALIGNMENT] = sregs->u.e.ivor_low[5]; - vcpu->arch.ivor[BOOKE_IRQPRIO_PROGRAM] = sregs->u.e.ivor_low[6]; - vcpu->arch.ivor[BOOKE_IRQPRIO_FP_UNAVAIL] = sregs->u.e.ivor_low[7]; - vcpu->arch.ivor[BOOKE_IRQPRIO_SYSCALL] = sregs->u.e.ivor_low[8]; - vcpu->arch.ivor[BOOKE_IRQPRIO_AP_UNAVAIL] = sregs->u.e.ivor_low[9]; - vcpu->arch.ivor[BOOKE_IRQPRIO_DECREMENTER] = sregs->u.e.ivor_low[10]; - vcpu->arch.ivor[BOOKE_IRQPRIO_FIT] = sregs->u.e.ivor_low[11]; - vcpu->arch.ivor[BOOKE_IRQPRIO_WATCHDOG] = sregs->u.e.ivor_low[12]; - vcpu->arch.ivor[BOOKE_IRQPRIO_DTLB_MISS] = sregs->u.e.ivor_low[13]; - vcpu->arch.ivor[BOOKE_IRQPRIO_ITLB_MISS] = sregs->u.e.ivor_low[14]; - vcpu->arch.ivor[BOOKE_IRQPRIO_DEBUG] = sregs->u.e.ivor_low[15]; - - return 0; -} - -int kvm_arch_vcpu_ioctl_get_sregs(struct kvm_vcpu *vcpu, - struct kvm_sregs *sregs) -{ - sregs->pvr = vcpu->arch.pvr; - - get_sregs_base(vcpu, sregs); - get_sregs_arch206(vcpu, sregs); - kvmppc_core_get_sregs(vcpu, sregs); - return 0; -} - -int kvm_arch_vcpu_ioctl_set_sregs(struct kvm_vcpu *vcpu, - struct kvm_sregs *sregs) -{ - int ret; - - if (vcpu->arch.pvr != sregs->pvr) - return -EINVAL; - - ret = set_sregs_base(vcpu, sregs); - if (ret < 0) - return ret; - - ret = set_sregs_arch206(vcpu, sregs); - if (ret < 0) - return ret; - - return kvmppc_core_set_sregs(vcpu, sregs); -} - -int kvm_vcpu_ioctl_get_one_reg(struct kvm_vcpu *vcpu, struct kvm_one_reg *reg) -{ - return -EINVAL; -} - -int kvm_vcpu_ioctl_set_one_reg(struct kvm_vcpu *vcpu, struct kvm_one_reg *reg) -{ - return -EINVAL; -} - -int kvm_arch_vcpu_ioctl_get_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu) -{ - return -ENOTSUPP; -} - -int kvm_arch_vcpu_ioctl_set_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu) -{ - return -ENOTSUPP; -} - -int kvm_arch_vcpu_ioctl_translate(struct kvm_vcpu *vcpu, - struct kvm_translation *tr) -{ - int r; - - r = kvmppc_core_vcpu_translate(vcpu, tr); - return r; -} - -int kvm_vm_ioctl_get_dirty_log(struct kvm *kvm, struct kvm_dirty_log *log) -{ - return -ENOTSUPP; -} - -int kvmppc_core_prepare_memory_region(struct kvm *kvm, - struct kvm_userspace_memory_region *mem) -{ - return 0; -} - -void kvmppc_core_commit_memory_region(struct kvm *kvm, - struct kvm_userspace_memory_region *mem) -{ -} - -int kvmppc_core_init_vm(struct kvm *kvm) -{ - return 0; -} - -void kvmppc_core_destroy_vm(struct kvm *kvm) -{ -} - -void kvmppc_set_tcr(struct kvm_vcpu *vcpu, u32 new_tcr) -{ - vcpu->arch.tcr = new_tcr; - update_timer_ints(vcpu); -} - -void kvmppc_set_tsr_bits(struct kvm_vcpu *vcpu, u32 tsr_bits) -{ - set_bits(tsr_bits, &vcpu->arch.tsr); - smp_wmb(); - kvm_make_request(KVM_REQ_PENDING_TIMER, vcpu); - kvm_vcpu_kick(vcpu); -} - -void kvmppc_clr_tsr_bits(struct kvm_vcpu *vcpu, u32 tsr_bits) -{ - clear_bits(tsr_bits, &vcpu->arch.tsr); - update_timer_ints(vcpu); -} - -void kvmppc_decrementer_func(unsigned long data) -{ - struct kvm_vcpu *vcpu = (struct kvm_vcpu *)data; - - kvmppc_set_tsr_bits(vcpu, TSR_DIS); -} - -int __init kvmppc_booke_init(void) -{ - unsigned long ivor[16]; - unsigned long max_ivor = 0; - int i; - - /* We install our own exception handlers by hijacking IVPR. IVPR must - * be 16-bit aligned, so we need a 64KB allocation. */ - kvmppc_booke_handlers = __get_free_pages(GFP_KERNEL | __GFP_ZERO, - VCPU_SIZE_ORDER); - if (!kvmppc_booke_handlers) - return -ENOMEM; - - /* XXX make sure our handlers are smaller than Linux's */ - - /* Copy our interrupt handlers to match host IVORs. That way we don't - * have to swap the IVORs on every guest/host transition. */ - ivor[0] = mfspr(SPRN_IVOR0); - ivor[1] = mfspr(SPRN_IVOR1); - ivor[2] = mfspr(SPRN_IVOR2); - ivor[3] = mfspr(SPRN_IVOR3); - ivor[4] = mfspr(SPRN_IVOR4); - ivor[5] = mfspr(SPRN_IVOR5); - ivor[6] = mfspr(SPRN_IVOR6); - ivor[7] = mfspr(SPRN_IVOR7); - ivor[8] = mfspr(SPRN_IVOR8); - ivor[9] = mfspr(SPRN_IVOR9); - ivor[10] = mfspr(SPRN_IVOR10); - ivor[11] = mfspr(SPRN_IVOR11); - ivor[12] = mfspr(SPRN_IVOR12); - ivor[13] = mfspr(SPRN_IVOR13); - ivor[14] = mfspr(SPRN_IVOR14); - ivor[15] = mfspr(SPRN_IVOR15); - - for (i = 0; i < 16; i++) { - if (ivor[i] > max_ivor) - max_ivor = ivor[i]; - - memcpy((void *)kvmppc_booke_handlers + ivor[i], - kvmppc_handlers_start + i * kvmppc_handler_len, - kvmppc_handler_len); - } - flush_icache_range(kvmppc_booke_handlers, - kvmppc_booke_handlers + max_ivor + kvmppc_handler_len); - - return 0; -} - -void __exit kvmppc_booke_exit(void) -{ - free_pages(kvmppc_booke_handlers, VCPU_SIZE_ORDER); - kvm_exit(); -} |