diff options
Diffstat (limited to 'arch/mips/kvm/kvm_mips.c')
| -rw-r--r-- | arch/mips/kvm/kvm_mips.c | 1226 |
1 files changed, 0 insertions, 1226 deletions
diff --git a/arch/mips/kvm/kvm_mips.c b/arch/mips/kvm/kvm_mips.c deleted file mode 100644 index cd5e4f568439..000000000000 --- a/arch/mips/kvm/kvm_mips.c +++ /dev/null @@ -1,1226 +0,0 @@ -/* - * This file is subject to the terms and conditions of the GNU General Public - * License. See the file "COPYING" in the main directory of this archive - * for more details. - * - * KVM/MIPS: MIPS specific KVM APIs - * - * Copyright (C) 2012 MIPS Technologies, Inc. All rights reserved. - * Authors: Sanjay Lal <sanjayl@kymasys.com> -*/ - -#include <linux/errno.h> -#include <linux/err.h> -#include <linux/module.h> -#include <linux/vmalloc.h> -#include <linux/fs.h> -#include <linux/bootmem.h> -#include <asm/page.h> -#include <asm/cacheflush.h> -#include <asm/mmu_context.h> - -#include <linux/kvm_host.h> - -#include "kvm_mips_int.h" -#include "kvm_mips_comm.h" - -#define CREATE_TRACE_POINTS -#include "trace.h" - -#ifndef VECTORSPACING -#define VECTORSPACING 0x100 /* for EI/VI mode */ -#endif - -#define VCPU_STAT(x) offsetof(struct kvm_vcpu, stat.x), KVM_STAT_VCPU -struct kvm_stats_debugfs_item debugfs_entries[] = { - { "wait", VCPU_STAT(wait_exits) }, - { "cache", VCPU_STAT(cache_exits) }, - { "signal", VCPU_STAT(signal_exits) }, - { "interrupt", VCPU_STAT(int_exits) }, - { "cop_unsuable", VCPU_STAT(cop_unusable_exits) }, - { "tlbmod", VCPU_STAT(tlbmod_exits) }, - { "tlbmiss_ld", VCPU_STAT(tlbmiss_ld_exits) }, - { "tlbmiss_st", VCPU_STAT(tlbmiss_st_exits) }, - { "addrerr_st", VCPU_STAT(addrerr_st_exits) }, - { "addrerr_ld", VCPU_STAT(addrerr_ld_exits) }, - { "syscall", VCPU_STAT(syscall_exits) }, - { "resvd_inst", VCPU_STAT(resvd_inst_exits) }, - { "break_inst", VCPU_STAT(break_inst_exits) }, - { "flush_dcache", VCPU_STAT(flush_dcache_exits) }, - { "halt_wakeup", VCPU_STAT(halt_wakeup) }, - {NULL} -}; - -static int kvm_mips_reset_vcpu(struct kvm_vcpu *vcpu) -{ - int i; - for_each_possible_cpu(i) { - vcpu->arch.guest_kernel_asid[i] = 0; - vcpu->arch.guest_user_asid[i] = 0; - } - return 0; -} - -/* XXXKYMA: We are simulatoring a processor that has the WII bit set in Config7, so we - * are "runnable" if interrupts are pending - */ -int kvm_arch_vcpu_runnable(struct kvm_vcpu *vcpu) -{ - return !!(vcpu->arch.pending_exceptions); -} - -int kvm_arch_vcpu_should_kick(struct kvm_vcpu *vcpu) -{ - return 1; -} - -int kvm_arch_hardware_enable(void *garbage) -{ - return 0; -} - -void kvm_arch_hardware_disable(void *garbage) -{ -} - -int kvm_arch_hardware_setup(void) -{ - return 0; -} - -void kvm_arch_hardware_unsetup(void) -{ -} - -void kvm_arch_check_processor_compat(void *rtn) -{ - int *r = (int *)rtn; - *r = 0; - return; -} - -static void kvm_mips_init_tlbs(struct kvm *kvm) -{ - unsigned long wired; - - /* Add a wired entry to the TLB, it is used to map the commpage to the Guest kernel */ - wired = read_c0_wired(); - write_c0_wired(wired + 1); - mtc0_tlbw_hazard(); - kvm->arch.commpage_tlb = wired; - - kvm_debug("[%d] commpage TLB: %d\n", smp_processor_id(), - kvm->arch.commpage_tlb); -} - -static void kvm_mips_init_vm_percpu(void *arg) -{ - struct kvm *kvm = (struct kvm *)arg; - - kvm_mips_init_tlbs(kvm); - kvm_mips_callbacks->vm_init(kvm); - -} - -int kvm_arch_init_vm(struct kvm *kvm, unsigned long type) -{ - if (atomic_inc_return(&kvm_mips_instance) == 1) { - kvm_debug("%s: 1st KVM instance, setup host TLB parameters\n", - __func__); - on_each_cpu(kvm_mips_init_vm_percpu, kvm, 1); - } - - - return 0; -} - -void kvm_mips_free_vcpus(struct kvm *kvm) -{ - unsigned int i; - struct kvm_vcpu *vcpu; - - /* Put the pages we reserved for the guest pmap */ - for (i = 0; i < kvm->arch.guest_pmap_npages; i++) { - if (kvm->arch.guest_pmap[i] != KVM_INVALID_PAGE) - kvm_mips_release_pfn_clean(kvm->arch.guest_pmap[i]); - } - kfree(kvm->arch.guest_pmap); - - kvm_for_each_vcpu(i, vcpu, kvm) { - kvm_arch_vcpu_free(vcpu); - } - - mutex_lock(&kvm->lock); - - for (i = 0; i < atomic_read(&kvm->online_vcpus); i++) - kvm->vcpus[i] = NULL; - - atomic_set(&kvm->online_vcpus, 0); - - mutex_unlock(&kvm->lock); -} - -void kvm_arch_sync_events(struct kvm *kvm) -{ -} - -static void kvm_mips_uninit_tlbs(void *arg) -{ - /* Restore wired count */ - write_c0_wired(0); - mtc0_tlbw_hazard(); - /* Clear out all the TLBs */ - kvm_local_flush_tlb_all(); -} - -void kvm_arch_destroy_vm(struct kvm *kvm) -{ - kvm_mips_free_vcpus(kvm); - - /* If this is the last instance, restore wired count */ - if (atomic_dec_return(&kvm_mips_instance) == 0) { - kvm_debug("%s: last KVM instance, restoring TLB parameters\n", - __func__); - on_each_cpu(kvm_mips_uninit_tlbs, NULL, 1); - } -} - -long -kvm_arch_dev_ioctl(struct file *filp, unsigned int ioctl, unsigned long arg) -{ - return -ENOIOCTLCMD; -} - -void kvm_arch_free_memslot(struct kvm *kvm, struct kvm_memory_slot *free, - struct kvm_memory_slot *dont) -{ -} - -int kvm_arch_create_memslot(struct kvm *kvm, struct kvm_memory_slot *slot, - unsigned long npages) -{ - return 0; -} - -void kvm_arch_memslots_updated(struct kvm *kvm) -{ -} - -int kvm_arch_prepare_memory_region(struct kvm *kvm, - struct kvm_memory_slot *memslot, - struct kvm_userspace_memory_region *mem, - enum kvm_mr_change change) -{ - return 0; -} - -void kvm_arch_commit_memory_region(struct kvm *kvm, - struct kvm_userspace_memory_region *mem, - const struct kvm_memory_slot *old, - enum kvm_mr_change change) -{ - unsigned long npages = 0; - int i, err = 0; - - kvm_debug("%s: kvm: %p slot: %d, GPA: %llx, size: %llx, QVA: %llx\n", - __func__, kvm, mem->slot, mem->guest_phys_addr, - mem->memory_size, mem->userspace_addr); - - /* Setup Guest PMAP table */ - if (!kvm->arch.guest_pmap) { - if (mem->slot == 0) - npages = mem->memory_size >> PAGE_SHIFT; - - if (npages) { - kvm->arch.guest_pmap_npages = npages; - kvm->arch.guest_pmap = - kzalloc(npages * sizeof(unsigned long), GFP_KERNEL); - - if (!kvm->arch.guest_pmap) { - kvm_err("Failed to allocate guest PMAP"); - err = -ENOMEM; - goto out; - } - - kvm_debug("Allocated space for Guest PMAP Table (%ld pages) @ %p\n", - npages, kvm->arch.guest_pmap); - - /* Now setup the page table */ - for (i = 0; i < npages; i++) { - kvm->arch.guest_pmap[i] = KVM_INVALID_PAGE; - } - } - } -out: - return; -} - -void kvm_arch_flush_shadow_all(struct kvm *kvm) -{ -} - -void kvm_arch_flush_shadow_memslot(struct kvm *kvm, - struct kvm_memory_slot *slot) -{ -} - -void kvm_arch_flush_shadow(struct kvm *kvm) -{ -} - -struct kvm_vcpu *kvm_arch_vcpu_create(struct kvm *kvm, unsigned int id) -{ - extern char mips32_exception[], mips32_exceptionEnd[]; - extern char mips32_GuestException[], mips32_GuestExceptionEnd[]; - int err, size, offset; - void *gebase; - int i; - - struct kvm_vcpu *vcpu = kzalloc(sizeof(struct kvm_vcpu), GFP_KERNEL); - - if (!vcpu) { - err = -ENOMEM; - goto out; - } - - err = kvm_vcpu_init(vcpu, kvm, id); - - if (err) - goto out_free_cpu; - - kvm_debug("kvm @ %p: create cpu %d at %p\n", kvm, id, vcpu); - - /* Allocate space for host mode exception handlers that handle - * guest mode exits - */ - if (cpu_has_veic || cpu_has_vint) { - size = 0x200 + VECTORSPACING * 64; - } else { - size = 0x4000; - } - - /* Save Linux EBASE */ - vcpu->arch.host_ebase = (void *)read_c0_ebase(); - - gebase = kzalloc(ALIGN(size, PAGE_SIZE), GFP_KERNEL); - - if (!gebase) { - err = -ENOMEM; - goto out_free_cpu; - } - kvm_debug("Allocated %d bytes for KVM Exception Handlers @ %p\n", - ALIGN(size, PAGE_SIZE), gebase); - - /* Save new ebase */ - vcpu->arch.guest_ebase = gebase; - - /* Copy L1 Guest Exception handler to correct offset */ - - /* TLB Refill, EXL = 0 */ - memcpy(gebase, mips32_exception, - mips32_exceptionEnd - mips32_exception); - - /* General Exception Entry point */ - memcpy(gebase + 0x180, mips32_exception, - mips32_exceptionEnd - mips32_exception); - - /* For vectored interrupts poke the exception code @ all offsets 0-7 */ - for (i = 0; i < 8; i++) { - kvm_debug("L1 Vectored handler @ %p\n", - gebase + 0x200 + (i * VECTORSPACING)); - memcpy(gebase + 0x200 + (i * VECTORSPACING), mips32_exception, - mips32_exceptionEnd - mips32_exception); - } - - /* General handler, relocate to unmapped space for sanity's sake */ - offset = 0x2000; - kvm_debug("Installing KVM Exception handlers @ %p, %#x bytes\n", - gebase + offset, - mips32_GuestExceptionEnd - mips32_GuestException); - - memcpy(gebase + offset, mips32_GuestException, - mips32_GuestExceptionEnd - mips32_GuestException); - - /* Invalidate the icache for these ranges */ - local_flush_icache_range((unsigned long)gebase, - (unsigned long)gebase + ALIGN(size, PAGE_SIZE)); - - /* Allocate comm page for guest kernel, a TLB will be reserved for mapping GVA @ 0xFFFF8000 to this page */ - vcpu->arch.kseg0_commpage = kzalloc(PAGE_SIZE << 1, GFP_KERNEL); - - if (!vcpu->arch.kseg0_commpage) { - err = -ENOMEM; - goto out_free_gebase; - } - - kvm_debug("Allocated COMM page @ %p\n", vcpu->arch.kseg0_commpage); - kvm_mips_commpage_init(vcpu); - - /* Init */ - vcpu->arch.last_sched_cpu = -1; - - /* Start off the timer */ - kvm_mips_init_count(vcpu); - - return vcpu; - -out_free_gebase: - kfree(gebase); - -out_free_cpu: - kfree(vcpu); - -out: - return ERR_PTR(err); -} - -void kvm_arch_vcpu_free(struct kvm_vcpu *vcpu) -{ - hrtimer_cancel(&vcpu->arch.comparecount_timer); - - kvm_vcpu_uninit(vcpu); - - kvm_mips_dump_stats(vcpu); - - kfree(vcpu->arch.guest_ebase); - kfree(vcpu->arch.kseg0_commpage); -} - -void kvm_arch_vcpu_destroy(struct kvm_vcpu *vcpu) -{ - kvm_arch_vcpu_free(vcpu); -} - -int -kvm_arch_vcpu_ioctl_set_guest_debug(struct kvm_vcpu *vcpu, - struct kvm_guest_debug *dbg) -{ - return -ENOIOCTLCMD; -} - -int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu, struct kvm_run *run) -{ - int r = 0; - sigset_t sigsaved; - - if (vcpu->sigset_active) - sigprocmask(SIG_SETMASK, &vcpu->sigset, &sigsaved); - - if (vcpu->mmio_needed) { - if (!vcpu->mmio_is_write) - kvm_mips_complete_mmio_load(vcpu, run); - vcpu->mmio_needed = 0; - } - - local_irq_disable(); - /* Check if we have any exceptions/interrupts pending */ - kvm_mips_deliver_interrupts(vcpu, - kvm_read_c0_guest_cause(vcpu->arch.cop0)); - - kvm_guest_enter(); - - r = __kvm_mips_vcpu_run(run, vcpu); - - kvm_guest_exit(); - local_irq_enable(); - - if (vcpu->sigset_active) - sigprocmask(SIG_SETMASK, &sigsaved, NULL); - - return r; -} - -int -kvm_vcpu_ioctl_interrupt(struct kvm_vcpu *vcpu, struct kvm_mips_interrupt *irq) -{ - int intr = (int)irq->irq; - struct kvm_vcpu *dvcpu = NULL; - - if (intr == 3 || intr == -3 || intr == 4 || intr == -4) - kvm_debug("%s: CPU: %d, INTR: %d\n", __func__, irq->cpu, - (int)intr); - - if (irq->cpu == -1) - dvcpu = vcpu; - else - dvcpu = vcpu->kvm->vcpus[irq->cpu]; - - if (intr == 2 || intr == 3 || intr == 4) { - kvm_mips_callbacks->queue_io_int(dvcpu, irq); - - } else if (intr == -2 || intr == -3 || intr == -4) { - kvm_mips_callbacks->dequeue_io_int(dvcpu, irq); - } else { - kvm_err("%s: invalid interrupt ioctl (%d:%d)\n", __func__, - irq->cpu, irq->irq); - return -EINVAL; - } - - dvcpu->arch.wait = 0; - - if (waitqueue_active(&dvcpu->wq)) { - wake_up_interruptible(&dvcpu->wq); - } - - return 0; -} - -int -kvm_arch_vcpu_ioctl_get_mpstate(struct kvm_vcpu *vcpu, - struct kvm_mp_state *mp_state) -{ - return -ENOIOCTLCMD; -} - -int -kvm_arch_vcpu_ioctl_set_mpstate(struct kvm_vcpu *vcpu, - struct kvm_mp_state *mp_state) -{ - return -ENOIOCTLCMD; -} - -static u64 kvm_mips_get_one_regs[] = { - KVM_REG_MIPS_R0, - KVM_REG_MIPS_R1, - KVM_REG_MIPS_R2, - KVM_REG_MIPS_R3, - KVM_REG_MIPS_R4, - KVM_REG_MIPS_R5, - KVM_REG_MIPS_R6, - KVM_REG_MIPS_R7, - KVM_REG_MIPS_R8, - KVM_REG_MIPS_R9, - KVM_REG_MIPS_R10, - KVM_REG_MIPS_R11, - KVM_REG_MIPS_R12, - KVM_REG_MIPS_R13, - KVM_REG_MIPS_R14, - KVM_REG_MIPS_R15, - KVM_REG_MIPS_R16, - KVM_REG_MIPS_R17, - KVM_REG_MIPS_R18, - KVM_REG_MIPS_R19, - KVM_REG_MIPS_R20, - KVM_REG_MIPS_R21, - KVM_REG_MIPS_R22, - KVM_REG_MIPS_R23, - KVM_REG_MIPS_R24, - KVM_REG_MIPS_R25, - KVM_REG_MIPS_R26, - KVM_REG_MIPS_R27, - KVM_REG_MIPS_R28, - KVM_REG_MIPS_R29, - KVM_REG_MIPS_R30, - KVM_REG_MIPS_R31, - - KVM_REG_MIPS_HI, - KVM_REG_MIPS_LO, - KVM_REG_MIPS_PC, - - KVM_REG_MIPS_CP0_INDEX, - KVM_REG_MIPS_CP0_CONTEXT, - KVM_REG_MIPS_CP0_USERLOCAL, - KVM_REG_MIPS_CP0_PAGEMASK, - KVM_REG_MIPS_CP0_WIRED, - KVM_REG_MIPS_CP0_HWRENA, - KVM_REG_MIPS_CP0_BADVADDR, - KVM_REG_MIPS_CP0_COUNT, - KVM_REG_MIPS_CP0_ENTRYHI, - KVM_REG_MIPS_CP0_COMPARE, - KVM_REG_MIPS_CP0_STATUS, - KVM_REG_MIPS_CP0_CAUSE, - KVM_REG_MIPS_CP0_EPC, - KVM_REG_MIPS_CP0_CONFIG, - KVM_REG_MIPS_CP0_CONFIG1, - KVM_REG_MIPS_CP0_CONFIG2, - KVM_REG_MIPS_CP0_CONFIG3, - KVM_REG_MIPS_CP0_CONFIG7, - KVM_REG_MIPS_CP0_ERROREPC, - - KVM_REG_MIPS_COUNT_CTL, - KVM_REG_MIPS_COUNT_RESUME, - KVM_REG_MIPS_COUNT_HZ, -}; - -static int kvm_mips_get_reg(struct kvm_vcpu *vcpu, - const struct kvm_one_reg *reg) -{ - struct mips_coproc *cop0 = vcpu->arch.cop0; - int ret; - s64 v; - - switch (reg->id) { - case KVM_REG_MIPS_R0 ... KVM_REG_MIPS_R31: - v = (long)vcpu->arch.gprs[reg->id - KVM_REG_MIPS_R0]; - break; - case KVM_REG_MIPS_HI: - v = (long)vcpu->arch.hi; - break; - case KVM_REG_MIPS_LO: - v = (long)vcpu->arch.lo; - break; - case KVM_REG_MIPS_PC: - v = (long)vcpu->arch.pc; - break; - - case KVM_REG_MIPS_CP0_INDEX: - v = (long)kvm_read_c0_guest_index(cop0); - break; - case KVM_REG_MIPS_CP0_CONTEXT: - v = (long)kvm_read_c0_guest_context(cop0); - break; - case KVM_REG_MIPS_CP0_USERLOCAL: - v = (long)kvm_read_c0_guest_userlocal(cop0); - break; - case KVM_REG_MIPS_CP0_PAGEMASK: - v = (long)kvm_read_c0_guest_pagemask(cop0); - break; - case KVM_REG_MIPS_CP0_WIRED: - v = (long)kvm_read_c0_guest_wired(cop0); - break; - case KVM_REG_MIPS_CP0_HWRENA: - v = (long)kvm_read_c0_guest_hwrena(cop0); - break; - case KVM_REG_MIPS_CP0_BADVADDR: - v = (long)kvm_read_c0_guest_badvaddr(cop0); - break; - case KVM_REG_MIPS_CP0_ENTRYHI: - v = (long)kvm_read_c0_guest_entryhi(cop0); - break; - case KVM_REG_MIPS_CP0_COMPARE: - v = (long)kvm_read_c0_guest_compare(cop0); - break; - case KVM_REG_MIPS_CP0_STATUS: - v = (long)kvm_read_c0_guest_status(cop0); - break; - case KVM_REG_MIPS_CP0_CAUSE: - v = (long)kvm_read_c0_guest_cause(cop0); - break; - case KVM_REG_MIPS_CP0_EPC: - v = (long)kvm_read_c0_guest_epc(cop0); - break; - case KVM_REG_MIPS_CP0_ERROREPC: - v = (long)kvm_read_c0_guest_errorepc(cop0); - break; - case KVM_REG_MIPS_CP0_CONFIG: - v = (long)kvm_read_c0_guest_config(cop0); - break; - case KVM_REG_MIPS_CP0_CONFIG1: - v = (long)kvm_read_c0_guest_config1(cop0); - break; - case KVM_REG_MIPS_CP0_CONFIG2: - v = (long)kvm_read_c0_guest_config2(cop0); - break; - case KVM_REG_MIPS_CP0_CONFIG3: - v = (long)kvm_read_c0_guest_config3(cop0); - break; - case KVM_REG_MIPS_CP0_CONFIG7: - v = (long)kvm_read_c0_guest_config7(cop0); - break; - /* registers to be handled specially */ - case KVM_REG_MIPS_CP0_COUNT: - case KVM_REG_MIPS_COUNT_CTL: - case KVM_REG_MIPS_COUNT_RESUME: - case KVM_REG_MIPS_COUNT_HZ: - ret = kvm_mips_callbacks->get_one_reg(vcpu, reg, &v); - if (ret) - return ret; - break; - default: - return -EINVAL; - } - if ((reg->id & KVM_REG_SIZE_MASK) == KVM_REG_SIZE_U64) { - u64 __user *uaddr64 = (u64 __user *)(long)reg->addr; - return put_user(v, uaddr64); - } else if ((reg->id & KVM_REG_SIZE_MASK) == KVM_REG_SIZE_U32) { - u32 __user *uaddr32 = (u32 __user *)(long)reg->addr; - u32 v32 = (u32)v; - return put_user(v32, uaddr32); - } else { - return -EINVAL; - } -} - -static int kvm_mips_set_reg(struct kvm_vcpu *vcpu, - const struct kvm_one_reg *reg) -{ - struct mips_coproc *cop0 = vcpu->arch.cop0; - u64 v; - - if ((reg->id & KVM_REG_SIZE_MASK) == KVM_REG_SIZE_U64) { - u64 __user *uaddr64 = (u64 __user *)(long)reg->addr; - - if (get_user(v, uaddr64) != 0) - return -EFAULT; - } else if ((reg->id & KVM_REG_SIZE_MASK) == KVM_REG_SIZE_U32) { - u32 __user *uaddr32 = (u32 __user *)(long)reg->addr; - s32 v32; - - if (get_user(v32, uaddr32) != 0) - return -EFAULT; - v = (s64)v32; - } else { - return -EINVAL; - } - - switch (reg->id) { - case KVM_REG_MIPS_R0: - /* Silently ignore requests to set $0 */ - break; - case KVM_REG_MIPS_R1 ... KVM_REG_MIPS_R31: - vcpu->arch.gprs[reg->id - KVM_REG_MIPS_R0] = v; - break; - case KVM_REG_MIPS_HI: - vcpu->arch.hi = v; - break; - case KVM_REG_MIPS_LO: - vcpu->arch.lo = v; - break; - case KVM_REG_MIPS_PC: - vcpu->arch.pc = v; - break; - - case KVM_REG_MIPS_CP0_INDEX: - kvm_write_c0_guest_index(cop0, v); - break; - case KVM_REG_MIPS_CP0_CONTEXT: - kvm_write_c0_guest_context(cop0, v); - break; - case KVM_REG_MIPS_CP0_USERLOCAL: - kvm_write_c0_guest_userlocal(cop0, v); - break; - case KVM_REG_MIPS_CP0_PAGEMASK: - kvm_write_c0_guest_pagemask(cop0, v); - break; - case KVM_REG_MIPS_CP0_WIRED: - kvm_write_c0_guest_wired(cop0, v); - break; - case KVM_REG_MIPS_CP0_HWRENA: - kvm_write_c0_guest_hwrena(cop0, v); - break; - case KVM_REG_MIPS_CP0_BADVADDR: - kvm_write_c0_guest_badvaddr(cop0, v); - break; - case KVM_REG_MIPS_CP0_ENTRYHI: - kvm_write_c0_guest_entryhi(cop0, v); - break; - case KVM_REG_MIPS_CP0_STATUS: - kvm_write_c0_guest_status(cop0, v); - break; - case KVM_REG_MIPS_CP0_EPC: - kvm_write_c0_guest_epc(cop0, v); - break; - case KVM_REG_MIPS_CP0_ERROREPC: - kvm_write_c0_guest_errorepc(cop0, v); - break; - /* registers to be handled specially */ - case KVM_REG_MIPS_CP0_COUNT: - case KVM_REG_MIPS_CP0_COMPARE: - case KVM_REG_MIPS_CP0_CAUSE: - case KVM_REG_MIPS_COUNT_CTL: - case KVM_REG_MIPS_COUNT_RESUME: - case KVM_REG_MIPS_COUNT_HZ: - return kvm_mips_callbacks->set_one_reg(vcpu, reg, v); - default: - return -EINVAL; - } - return 0; -} - -long -kvm_arch_vcpu_ioctl(struct file *filp, unsigned int ioctl, unsigned long arg) -{ - struct kvm_vcpu *vcpu = filp->private_data; - void __user *argp = (void __user *)arg; - long r; - - switch (ioctl) { - case KVM_SET_ONE_REG: - case KVM_GET_ONE_REG: { - struct kvm_one_reg reg; - if (copy_from_user(®, argp, sizeof(reg))) - return -EFAULT; - if (ioctl == KVM_SET_ONE_REG) - return kvm_mips_set_reg(vcpu, ®); - else - return kvm_mips_get_reg(vcpu, ®); - } - case KVM_GET_REG_LIST: { - struct kvm_reg_list __user *user_list = argp; - u64 __user *reg_dest; - struct kvm_reg_list reg_list; - unsigned n; - - if (copy_from_user(®_list, user_list, sizeof(reg_list))) - return -EFAULT; - n = reg_list.n; - reg_list.n = ARRAY_SIZE(kvm_mips_get_one_regs); - if (copy_to_user(user_list, ®_list, sizeof(reg_list))) - return -EFAULT; - if (n < reg_list.n) - return -E2BIG; - reg_dest = user_list->reg; - if (copy_to_user(reg_dest, kvm_mips_get_one_regs, - sizeof(kvm_mips_get_one_regs))) - return -EFAULT; - return 0; - } - case KVM_NMI: - /* Treat the NMI as a CPU reset */ - r = kvm_mips_reset_vcpu(vcpu); - break; - case KVM_INTERRUPT: - { - struct kvm_mips_interrupt irq; - r = -EFAULT; - if (copy_from_user(&irq, argp, sizeof(irq))) - goto out; - - kvm_debug("[%d] %s: irq: %d\n", vcpu->vcpu_id, __func__, - irq.irq); - - r = kvm_vcpu_ioctl_interrupt(vcpu, &irq); - break; - } - default: - r = -ENOIOCTLCMD; - } - -out: - return r; -} - -/* - * Get (and clear) the dirty memory log for a memory slot. - */ -int kvm_vm_ioctl_get_dirty_log(struct kvm *kvm, struct kvm_dirty_log *log) -{ - struct kvm_memory_slot *memslot; - unsigned long ga, ga_end; - int is_dirty = 0; - int r; - unsigned long n; - - mutex_lock(&kvm->slots_lock); - - r = kvm_get_dirty_log(kvm, log, &is_dirty); - if (r) - goto out; - - /* If nothing is dirty, don't bother messing with page tables. */ - if (is_dirty) { - memslot = &kvm->memslots->memslots[log->slot]; - - ga = memslot->base_gfn << PAGE_SHIFT; - ga_end = ga + (memslot->npages << PAGE_SHIFT); - - printk("%s: dirty, ga: %#lx, ga_end %#lx\n", __func__, ga, - ga_end); - - n = kvm_dirty_bitmap_bytes(memslot); - memset(memslot->dirty_bitmap, 0, n); - } - - r = 0; -out: - mutex_unlock(&kvm->slots_lock); - return r; - -} - -long kvm_arch_vm_ioctl(struct file *filp, unsigned int ioctl, unsigned long arg) -{ - long r; - - switch (ioctl) { - default: - r = -ENOIOCTLCMD; - } - - return r; -} - -int kvm_arch_init(void *opaque) -{ - int ret; - - if (kvm_mips_callbacks) { - kvm_err("kvm: module already exists\n"); - return -EEXIST; - } - - ret = kvm_mips_emulation_init(&kvm_mips_callbacks); - - return ret; -} - -void kvm_arch_exit(void) -{ - kvm_mips_callbacks = NULL; -} - -int -kvm_arch_vcpu_ioctl_get_sregs(struct kvm_vcpu *vcpu, struct kvm_sregs *sregs) -{ - return -ENOIOCTLCMD; -} - -int -kvm_arch_vcpu_ioctl_set_sregs(struct kvm_vcpu *vcpu, struct kvm_sregs *sregs) -{ - return -ENOIOCTLCMD; -} - -int kvm_arch_vcpu_postcreate(struct kvm_vcpu *vcpu) -{ - return 0; -} - -int kvm_arch_vcpu_ioctl_get_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu) -{ - return -ENOIOCTLCMD; -} - -int kvm_arch_vcpu_ioctl_set_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu) -{ - return -ENOIOCTLCMD; -} - -int kvm_arch_vcpu_fault(struct kvm_vcpu *vcpu, struct vm_fault *vmf) -{ - return VM_FAULT_SIGBUS; -} - -int kvm_dev_ioctl_check_extension(long ext) -{ - int r; - - switch (ext) { - case KVM_CAP_ONE_REG: - r = 1; - break; - case KVM_CAP_COALESCED_MMIO: - r = KVM_COALESCED_MMIO_PAGE_OFFSET; - break; - default: - r = 0; - break; - } - return r; -} - -int kvm_cpu_has_pending_timer(struct kvm_vcpu *vcpu) -{ - return kvm_mips_pending_timer(vcpu); -} - -int kvm_arch_vcpu_dump_regs(struct kvm_vcpu *vcpu) -{ - int i; - struct mips_coproc *cop0; - - if (!vcpu) - return -1; - - printk("VCPU Register Dump:\n"); - printk("\tpc = 0x%08lx\n", vcpu->arch.pc); - printk("\texceptions: %08lx\n", vcpu->arch.pending_exceptions); - - for (i = 0; i < 32; i += 4) { - printk("\tgpr%02d: %08lx %08lx %08lx %08lx\n", i, - vcpu->arch.gprs[i], - vcpu->arch.gprs[i + 1], - vcpu->arch.gprs[i + 2], vcpu->arch.gprs[i + 3]); - } - printk("\thi: 0x%08lx\n", vcpu->arch.hi); - printk("\tlo: 0x%08lx\n", vcpu->arch.lo); - - cop0 = vcpu->arch.cop0; - printk("\tStatus: 0x%08lx, Cause: 0x%08lx\n", - kvm_read_c0_guest_status(cop0), kvm_read_c0_guest_cause(cop0)); - - printk("\tEPC: 0x%08lx\n", kvm_read_c0_guest_epc(cop0)); - - return 0; -} - -int kvm_arch_vcpu_ioctl_set_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs) -{ - int i; - - for (i = 1; i < ARRAY_SIZE(vcpu->arch.gprs); i++) - vcpu->arch.gprs[i] = regs->gpr[i]; - vcpu->arch.gprs[0] = 0; /* zero is special, and cannot be set. */ - vcpu->arch.hi = regs->hi; - vcpu->arch.lo = regs->lo; - vcpu->arch.pc = regs->pc; - - return 0; -} - -int kvm_arch_vcpu_ioctl_get_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs) -{ - int i; - - for (i = 0; i < ARRAY_SIZE(vcpu->arch.gprs); i++) - regs->gpr[i] = vcpu->arch.gprs[i]; - - regs->hi = vcpu->arch.hi; - regs->lo = vcpu->arch.lo; - regs->pc = vcpu->arch.pc; - - return 0; -} - -static void kvm_mips_comparecount_func(unsigned long data) -{ - struct kvm_vcpu *vcpu = (struct kvm_vcpu *)data; - - kvm_mips_callbacks->queue_timer_int(vcpu); - - vcpu->arch.wait = 0; - if (waitqueue_active(&vcpu->wq)) { - wake_up_interruptible(&vcpu->wq); - } -} - -/* - * low level hrtimer wake routine. - */ -static enum hrtimer_restart kvm_mips_comparecount_wakeup(struct hrtimer *timer) -{ - struct kvm_vcpu *vcpu; - - vcpu = container_of(timer, struct kvm_vcpu, arch.comparecount_timer); - kvm_mips_comparecount_func((unsigned long) vcpu); - return kvm_mips_count_timeout(vcpu); -} - -int kvm_arch_vcpu_init(struct kvm_vcpu *vcpu) -{ - kvm_mips_callbacks->vcpu_init(vcpu); - hrtimer_init(&vcpu->arch.comparecount_timer, CLOCK_MONOTONIC, - HRTIMER_MODE_REL); - vcpu->arch.comparecount_timer.function = kvm_mips_comparecount_wakeup; - return 0; -} - -void kvm_arch_vcpu_uninit(struct kvm_vcpu *vcpu) -{ - return; -} - -int -kvm_arch_vcpu_ioctl_translate(struct kvm_vcpu *vcpu, struct kvm_translation *tr) -{ - return 0; -} - -/* Initial guest state */ -int kvm_arch_vcpu_setup(struct kvm_vcpu *vcpu) -{ - return kvm_mips_callbacks->vcpu_setup(vcpu); -} - -static -void kvm_mips_set_c0_status(void) -{ - uint32_t status = read_c0_status(); - - if (cpu_has_fpu) - status |= (ST0_CU1); - - if (cpu_has_dsp) - status |= (ST0_MX); - - write_c0_status(status); - ehb(); -} - -/* - * Return value is in the form (errcode<<2 | RESUME_FLAG_HOST | RESUME_FLAG_NV) - */ -int kvm_mips_handle_exit(struct kvm_run *run, struct kvm_vcpu *vcpu) -{ - uint32_t cause = vcpu->arch.host_cp0_cause; - uint32_t exccode = (cause >> CAUSEB_EXCCODE) & 0x1f; - uint32_t __user *opc = (uint32_t __user *) vcpu->arch.pc; - unsigned long badvaddr = vcpu->arch.host_cp0_badvaddr; - enum emulation_result er = EMULATE_DONE; - int ret = RESUME_GUEST; - - /* Set a default exit reason */ - run->exit_reason = KVM_EXIT_UNKNOWN; - run->ready_for_interrupt_injection = 1; - - /* Set the appropriate status bits based on host CPU features, before we hit the scheduler */ - kvm_mips_set_c0_status(); - - local_irq_enable(); - - kvm_debug("kvm_mips_handle_exit: cause: %#x, PC: %p, kvm_run: %p, kvm_vcpu: %p\n", - cause, opc, run, vcpu); - - /* Do a privilege check, if in UM most of these exit conditions end up - * causing an exception to be delivered to the Guest Kernel - */ - er = kvm_mips_check_privilege(cause, opc, run, vcpu); - if (er == EMULATE_PRIV_FAIL) { - goto skip_emul; - } else if (er == EMULATE_FAIL) { - run->exit_reason = KVM_EXIT_INTERNAL_ERROR; - ret = RESUME_HOST; - goto skip_emul; - } - - switch (exccode) { - case T_INT: - kvm_debug("[%d]T_INT @ %p\n", vcpu->vcpu_id, opc); - - ++vcpu->stat.int_exits; - trace_kvm_exit(vcpu, INT_EXITS); - - if (need_resched()) { - cond_resched(); - } - - ret = RESUME_GUEST; - break; - - case T_COP_UNUSABLE: - kvm_debug("T_COP_UNUSABLE: @ PC: %p\n", opc); - - ++vcpu->stat.cop_unusable_exits; - trace_kvm_exit(vcpu, COP_UNUSABLE_EXITS); - ret = kvm_mips_callbacks->handle_cop_unusable(vcpu); - /* XXXKYMA: Might need to return to user space */ - if (run->exit_reason == KVM_EXIT_IRQ_WINDOW_OPEN) { - ret = RESUME_HOST; - } - break; - - case T_TLB_MOD: - ++vcpu->stat.tlbmod_exits; - trace_kvm_exit(vcpu, TLBMOD_EXITS); - ret = kvm_mips_callbacks->handle_tlb_mod(vcpu); - break; - - case T_TLB_ST_MISS: - kvm_debug - ("TLB ST fault: cause %#x, status %#lx, PC: %p, BadVaddr: %#lx\n", - cause, kvm_read_c0_guest_status(vcpu->arch.cop0), opc, - badvaddr); - - ++vcpu->stat.tlbmiss_st_exits; - trace_kvm_exit(vcpu, TLBMISS_ST_EXITS); - ret = kvm_mips_callbacks->handle_tlb_st_miss(vcpu); - break; - - case T_TLB_LD_MISS: - kvm_debug("TLB LD fault: cause %#x, PC: %p, BadVaddr: %#lx\n", - cause, opc, badvaddr); - - ++vcpu->stat.tlbmiss_ld_exits; - trace_kvm_exit(vcpu, TLBMISS_LD_EXITS); - ret = kvm_mips_callbacks->handle_tlb_ld_miss(vcpu); - break; - - case T_ADDR_ERR_ST: - ++vcpu->stat.addrerr_st_exits; - trace_kvm_exit(vcpu, ADDRERR_ST_EXITS); - ret = kvm_mips_callbacks->handle_addr_err_st(vcpu); - break; - - case T_ADDR_ERR_LD: - ++vcpu->stat.addrerr_ld_exits; - trace_kvm_exit(vcpu, ADDRERR_LD_EXITS); - ret = kvm_mips_callbacks->handle_addr_err_ld(vcpu); - break; - - case T_SYSCALL: - ++vcpu->stat.syscall_exits; - trace_kvm_exit(vcpu, SYSCALL_EXITS); - ret = kvm_mips_callbacks->handle_syscall(vcpu); - break; - - case T_RES_INST: - ++vcpu->stat.resvd_inst_exits; - trace_kvm_exit(vcpu, RESVD_INST_EXITS); - ret = kvm_mips_callbacks->handle_res_inst(vcpu); - break; - - case T_BREAK: - ++vcpu->stat.break_inst_exits; - trace_kvm_exit(vcpu, BREAK_INST_EXITS); - ret = kvm_mips_callbacks->handle_break(vcpu); - break; - - default: - kvm_err - ("Exception Code: %d, not yet handled, @ PC: %p, inst: 0x%08x BadVaddr: %#lx Status: %#lx\n", - exccode, opc, kvm_get_inst(opc, vcpu), badvaddr, - kvm_read_c0_guest_status(vcpu->arch.cop0)); - kvm_arch_vcpu_dump_regs(vcpu); - run->exit_reason = KVM_EXIT_INTERNAL_ERROR; - ret = RESUME_HOST; - break; - - } - -skip_emul: - local_irq_disable(); - - if (er == EMULATE_DONE && !(ret & RESUME_HOST)) - kvm_mips_deliver_interrupts(vcpu, cause); - - if (!(ret & RESUME_HOST)) { - /* Only check for signals if not already exiting to userspace */ - if (signal_pending(current)) { - run->exit_reason = KVM_EXIT_INTR; - ret = (-EINTR << 2) | RESUME_HOST; - ++vcpu->stat.signal_exits; - trace_kvm_exit(vcpu, SIGNAL_EXITS); - } - } - - return ret; -} - -int __init kvm_mips_init(void) -{ - int ret; - - ret = kvm_init(NULL, sizeof(struct kvm_vcpu), 0, THIS_MODULE); - - if (ret) - return ret; - - /* On MIPS, kernel modules are executed from "mapped space", which requires TLBs. - * The TLB handling code is statically linked with the rest of the kernel (kvm_tlb.c) - * to avoid the possibility of double faulting. The issue is that the TLB code - * references routines that are part of the the KVM module, - * which are only available once the module is loaded. - */ - kvm_mips_gfn_to_pfn = gfn_to_pfn; - kvm_mips_release_pfn_clean = kvm_release_pfn_clean; - kvm_mips_is_error_pfn = is_error_pfn; - - pr_info("KVM/MIPS Initialized\n"); - return 0; -} - -void __exit kvm_mips_exit(void) -{ - kvm_exit(); - - kvm_mips_gfn_to_pfn = NULL; - kvm_mips_release_pfn_clean = NULL; - kvm_mips_is_error_pfn = NULL; - - pr_info("KVM/MIPS unloaded\n"); -} - -module_init(kvm_mips_init); -module_exit(kvm_mips_exit); - -EXPORT_TRACEPOINT_SYMBOL(kvm_exit); |