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/*
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* QEMU KVM support
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*
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* Copyright IBM, Corp. 2008
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* Red Hat, Inc. 2008
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*
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* Authors:
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* Anthony Liguori <aliguori@us.ibm.com>
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* Glauber Costa <gcosta@redhat.com>
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*
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* This work is licensed under the terms of the GNU GPL, version 2 or later.
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* See the COPYING file in the top-level directory.
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*
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*/
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#include <sys/types.h> |
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#include <sys/ioctl.h> |
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#include <sys/mman.h> |
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#include <stdarg.h> |
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#include <linux/kvm.h> |
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#include "qemu-common.h" |
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#include "qemu-barrier.h" |
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#include "sysemu.h" |
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#include "hw/hw.h" |
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#include "gdbstub.h" |
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#include "kvm.h" |
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#include "bswap.h" |
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/* This check must be after config-host.h is included */
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#ifdef CONFIG_EVENTFD
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#include <sys/eventfd.h> |
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#endif
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/* KVM uses PAGE_SIZE in it's definition of COALESCED_MMIO_MAX */
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#define PAGE_SIZE TARGET_PAGE_SIZE
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//#define DEBUG_KVM
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#ifdef DEBUG_KVM
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#define DPRINTF(fmt, ...) \
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do { fprintf(stderr, fmt, ## __VA_ARGS__); } while (0) |
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#else
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#define DPRINTF(fmt, ...) \
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do { } while (0) |
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#endif
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typedef struct KVMSlot |
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{ |
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target_phys_addr_t start_addr; |
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ram_addr_t memory_size; |
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ram_addr_t phys_offset; |
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int slot;
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int flags;
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} KVMSlot; |
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typedef struct kvm_dirty_log KVMDirtyLog; |
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struct KVMState
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{ |
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KVMSlot slots[32];
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int fd;
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int vmfd;
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int coalesced_mmio;
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struct kvm_coalesced_mmio_ring *coalesced_mmio_ring;
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int broken_set_mem_region;
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int migration_log;
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int vcpu_events;
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int robust_singlestep;
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int debugregs;
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#ifdef KVM_CAP_SET_GUEST_DEBUG
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struct kvm_sw_breakpoint_head kvm_sw_breakpoints;
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#endif
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int irqchip_in_kernel;
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int pit_in_kernel;
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int xsave, xcrs;
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int many_ioeventfds;
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}; |
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KVMState *kvm_state; |
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|
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static const KVMCapabilityInfo kvm_required_capabilites[] = { |
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KVM_CAP_INFO(USER_MEMORY), |
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KVM_CAP_INFO(DESTROY_MEMORY_REGION_WORKS), |
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KVM_CAP_LAST_INFO |
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}; |
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|
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static KVMSlot *kvm_alloc_slot(KVMState *s)
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{ |
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int i;
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for (i = 0; i < ARRAY_SIZE(s->slots); i++) { |
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if (s->slots[i].memory_size == 0) { |
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return &s->slots[i];
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} |
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} |
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fprintf(stderr, "%s: no free slot available\n", __func__);
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abort(); |
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} |
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static KVMSlot *kvm_lookup_matching_slot(KVMState *s,
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target_phys_addr_t start_addr, |
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target_phys_addr_t end_addr) |
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{ |
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int i;
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for (i = 0; i < ARRAY_SIZE(s->slots); i++) { |
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KVMSlot *mem = &s->slots[i]; |
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if (start_addr == mem->start_addr &&
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end_addr == mem->start_addr + mem->memory_size) { |
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return mem;
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} |
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} |
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return NULL; |
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} |
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|
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/*
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* Find overlapping slot with lowest start address
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*/
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static KVMSlot *kvm_lookup_overlapping_slot(KVMState *s,
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target_phys_addr_t start_addr, |
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target_phys_addr_t end_addr) |
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{ |
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KVMSlot *found = NULL;
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int i;
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for (i = 0; i < ARRAY_SIZE(s->slots); i++) { |
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KVMSlot *mem = &s->slots[i]; |
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if (mem->memory_size == 0 || |
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(found && found->start_addr < mem->start_addr)) { |
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continue;
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} |
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|
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if (end_addr > mem->start_addr &&
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start_addr < mem->start_addr + mem->memory_size) { |
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found = mem; |
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} |
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} |
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return found;
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} |
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int kvm_physical_memory_addr_from_ram(KVMState *s, ram_addr_t ram_addr,
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target_phys_addr_t *phys_addr) |
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{ |
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int i;
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for (i = 0; i < ARRAY_SIZE(s->slots); i++) { |
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KVMSlot *mem = &s->slots[i]; |
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if (ram_addr >= mem->phys_offset &&
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ram_addr < mem->phys_offset + mem->memory_size) { |
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*phys_addr = mem->start_addr + (ram_addr - mem->phys_offset); |
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return 1; |
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} |
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} |
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return 0; |
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} |
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static int kvm_set_user_memory_region(KVMState *s, KVMSlot *slot) |
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{ |
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struct kvm_userspace_memory_region mem;
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mem.slot = slot->slot; |
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mem.guest_phys_addr = slot->start_addr; |
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mem.memory_size = slot->memory_size; |
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mem.userspace_addr = (unsigned long)qemu_safe_ram_ptr(slot->phys_offset); |
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mem.flags = slot->flags; |
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if (s->migration_log) {
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mem.flags |= KVM_MEM_LOG_DIRTY_PAGES; |
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} |
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return kvm_vm_ioctl(s, KVM_SET_USER_MEMORY_REGION, &mem);
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} |
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static void kvm_reset_vcpu(void *opaque) |
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{ |
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CPUState *env = opaque; |
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kvm_arch_reset_vcpu(env); |
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} |
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int kvm_irqchip_in_kernel(void) |
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{ |
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return kvm_state->irqchip_in_kernel;
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} |
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int kvm_pit_in_kernel(void) |
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{ |
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return kvm_state->pit_in_kernel;
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} |
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int kvm_init_vcpu(CPUState *env)
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{ |
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KVMState *s = kvm_state; |
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long mmap_size;
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int ret;
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DPRINTF("kvm_init_vcpu\n");
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ret = kvm_vm_ioctl(s, KVM_CREATE_VCPU, env->cpu_index); |
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if (ret < 0) { |
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DPRINTF("kvm_create_vcpu failed\n");
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goto err;
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} |
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env->kvm_fd = ret; |
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env->kvm_state = s; |
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env->kvm_vcpu_dirty = 1;
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mmap_size = kvm_ioctl(s, KVM_GET_VCPU_MMAP_SIZE, 0);
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if (mmap_size < 0) { |
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ret = mmap_size; |
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DPRINTF("KVM_GET_VCPU_MMAP_SIZE failed\n");
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goto err;
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} |
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env->kvm_run = mmap(NULL, mmap_size, PROT_READ | PROT_WRITE, MAP_SHARED,
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env->kvm_fd, 0);
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if (env->kvm_run == MAP_FAILED) {
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ret = -errno; |
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DPRINTF("mmap'ing vcpu state failed\n");
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goto err;
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} |
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if (s->coalesced_mmio && !s->coalesced_mmio_ring) {
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s->coalesced_mmio_ring = |
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(void *)env->kvm_run + s->coalesced_mmio * PAGE_SIZE;
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} |
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ret = kvm_arch_init_vcpu(env); |
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if (ret == 0) { |
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qemu_register_reset(kvm_reset_vcpu, env); |
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kvm_arch_reset_vcpu(env); |
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} |
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err:
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return ret;
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} |
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/*
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* dirty pages logging control
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*/
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static int kvm_dirty_pages_log_change(target_phys_addr_t phys_addr, |
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ram_addr_t size, int flags, int mask) |
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{ |
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KVMState *s = kvm_state; |
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KVMSlot *mem = kvm_lookup_matching_slot(s, phys_addr, phys_addr + size); |
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int old_flags;
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if (mem == NULL) { |
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fprintf(stderr, "BUG: %s: invalid parameters " TARGET_FMT_plx "-" |
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TARGET_FMT_plx "\n", __func__, phys_addr,
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(target_phys_addr_t)(phys_addr + size - 1));
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return -EINVAL;
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} |
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old_flags = mem->flags; |
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flags = (mem->flags & ~mask) | flags; |
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mem->flags = flags; |
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/* If nothing changed effectively, no need to issue ioctl */
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if (s->migration_log) {
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flags |= KVM_MEM_LOG_DIRTY_PAGES; |
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} |
271 |
if (flags == old_flags) {
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return 0; |
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} |
274 |
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return kvm_set_user_memory_region(s, mem);
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} |
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static int kvm_log_start(CPUPhysMemoryClient *client, |
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target_phys_addr_t phys_addr, ram_addr_t size) |
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{ |
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return kvm_dirty_pages_log_change(phys_addr, size, KVM_MEM_LOG_DIRTY_PAGES,
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KVM_MEM_LOG_DIRTY_PAGES); |
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} |
284 |
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static int kvm_log_stop(CPUPhysMemoryClient *client, |
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target_phys_addr_t phys_addr, ram_addr_t size) |
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{ |
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return kvm_dirty_pages_log_change(phys_addr, size, 0, |
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KVM_MEM_LOG_DIRTY_PAGES); |
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} |
291 |
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static int kvm_set_migration_log(int enable) |
293 |
{ |
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KVMState *s = kvm_state; |
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KVMSlot *mem; |
296 |
int i, err;
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|
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s->migration_log = enable; |
299 |
|
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for (i = 0; i < ARRAY_SIZE(s->slots); i++) { |
301 |
mem = &s->slots[i]; |
302 |
|
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if (!mem->memory_size) {
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continue;
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} |
306 |
if (!!(mem->flags & KVM_MEM_LOG_DIRTY_PAGES) == enable) {
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continue;
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} |
309 |
err = kvm_set_user_memory_region(s, mem); |
310 |
if (err) {
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return err;
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312 |
} |
313 |
} |
314 |
return 0; |
315 |
} |
316 |
|
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/* get kvm's dirty pages bitmap and update qemu's */
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318 |
static int kvm_get_dirty_pages_log_range(unsigned long start_addr, |
319 |
unsigned long *bitmap, |
320 |
unsigned long offset, |
321 |
unsigned long mem_size) |
322 |
{ |
323 |
unsigned int i, j; |
324 |
unsigned long page_number, addr, addr1, c; |
325 |
ram_addr_t ram_addr; |
326 |
unsigned int len = ((mem_size / TARGET_PAGE_SIZE) + HOST_LONG_BITS - 1) / |
327 |
HOST_LONG_BITS; |
328 |
|
329 |
/*
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330 |
* bitmap-traveling is faster than memory-traveling (for addr...)
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331 |
* especially when most of the memory is not dirty.
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*/
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333 |
for (i = 0; i < len; i++) { |
334 |
if (bitmap[i] != 0) { |
335 |
c = leul_to_cpu(bitmap[i]); |
336 |
do {
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337 |
j = ffsl(c) - 1;
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338 |
c &= ~(1ul << j);
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page_number = i * HOST_LONG_BITS + j; |
340 |
addr1 = page_number * TARGET_PAGE_SIZE; |
341 |
addr = offset + addr1; |
342 |
ram_addr = cpu_get_physical_page_desc(addr); |
343 |
cpu_physical_memory_set_dirty(ram_addr); |
344 |
} while (c != 0); |
345 |
} |
346 |
} |
347 |
return 0; |
348 |
} |
349 |
|
350 |
#define ALIGN(x, y) (((x)+(y)-1) & ~((y)-1)) |
351 |
|
352 |
/**
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353 |
* kvm_physical_sync_dirty_bitmap - Grab dirty bitmap from kernel space
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354 |
* This function updates qemu's dirty bitmap using cpu_physical_memory_set_dirty().
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355 |
* This means all bits are set to dirty.
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356 |
*
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357 |
* @start_add: start of logged region.
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358 |
* @end_addr: end of logged region.
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359 |
*/
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360 |
static int kvm_physical_sync_dirty_bitmap(target_phys_addr_t start_addr, |
361 |
target_phys_addr_t end_addr) |
362 |
{ |
363 |
KVMState *s = kvm_state; |
364 |
unsigned long size, allocated_size = 0; |
365 |
KVMDirtyLog d; |
366 |
KVMSlot *mem; |
367 |
int ret = 0; |
368 |
|
369 |
d.dirty_bitmap = NULL;
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370 |
while (start_addr < end_addr) {
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371 |
mem = kvm_lookup_overlapping_slot(s, start_addr, end_addr); |
372 |
if (mem == NULL) { |
373 |
break;
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374 |
} |
375 |
|
376 |
/* XXX bad kernel interface alert
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377 |
* For dirty bitmap, kernel allocates array of size aligned to
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378 |
* bits-per-long. But for case when the kernel is 64bits and
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379 |
* the userspace is 32bits, userspace can't align to the same
|
380 |
* bits-per-long, since sizeof(long) is different between kernel
|
381 |
* and user space. This way, userspace will provide buffer which
|
382 |
* may be 4 bytes less than the kernel will use, resulting in
|
383 |
* userspace memory corruption (which is not detectable by valgrind
|
384 |
* too, in most cases).
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385 |
* So for now, let's align to 64 instead of HOST_LONG_BITS here, in
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386 |
* a hope that sizeof(long) wont become >8 any time soon.
|
387 |
*/
|
388 |
size = ALIGN(((mem->memory_size) >> TARGET_PAGE_BITS), |
389 |
/*HOST_LONG_BITS*/ 64) / 8; |
390 |
if (!d.dirty_bitmap) {
|
391 |
d.dirty_bitmap = qemu_malloc(size); |
392 |
} else if (size > allocated_size) { |
393 |
d.dirty_bitmap = qemu_realloc(d.dirty_bitmap, size); |
394 |
} |
395 |
allocated_size = size; |
396 |
memset(d.dirty_bitmap, 0, allocated_size);
|
397 |
|
398 |
d.slot = mem->slot; |
399 |
|
400 |
if (kvm_vm_ioctl(s, KVM_GET_DIRTY_LOG, &d) == -1) { |
401 |
DPRINTF("ioctl failed %d\n", errno);
|
402 |
ret = -1;
|
403 |
break;
|
404 |
} |
405 |
|
406 |
kvm_get_dirty_pages_log_range(mem->start_addr, d.dirty_bitmap, |
407 |
mem->start_addr, mem->memory_size); |
408 |
start_addr = mem->start_addr + mem->memory_size; |
409 |
} |
410 |
qemu_free(d.dirty_bitmap); |
411 |
|
412 |
return ret;
|
413 |
} |
414 |
|
415 |
int kvm_coalesce_mmio_region(target_phys_addr_t start, ram_addr_t size)
|
416 |
{ |
417 |
int ret = -ENOSYS;
|
418 |
KVMState *s = kvm_state; |
419 |
|
420 |
if (s->coalesced_mmio) {
|
421 |
struct kvm_coalesced_mmio_zone zone;
|
422 |
|
423 |
zone.addr = start; |
424 |
zone.size = size; |
425 |
|
426 |
ret = kvm_vm_ioctl(s, KVM_REGISTER_COALESCED_MMIO, &zone); |
427 |
} |
428 |
|
429 |
return ret;
|
430 |
} |
431 |
|
432 |
int kvm_uncoalesce_mmio_region(target_phys_addr_t start, ram_addr_t size)
|
433 |
{ |
434 |
int ret = -ENOSYS;
|
435 |
KVMState *s = kvm_state; |
436 |
|
437 |
if (s->coalesced_mmio) {
|
438 |
struct kvm_coalesced_mmio_zone zone;
|
439 |
|
440 |
zone.addr = start; |
441 |
zone.size = size; |
442 |
|
443 |
ret = kvm_vm_ioctl(s, KVM_UNREGISTER_COALESCED_MMIO, &zone); |
444 |
} |
445 |
|
446 |
return ret;
|
447 |
} |
448 |
|
449 |
int kvm_check_extension(KVMState *s, unsigned int extension) |
450 |
{ |
451 |
int ret;
|
452 |
|
453 |
ret = kvm_ioctl(s, KVM_CHECK_EXTENSION, extension); |
454 |
if (ret < 0) { |
455 |
ret = 0;
|
456 |
} |
457 |
|
458 |
return ret;
|
459 |
} |
460 |
|
461 |
static int kvm_check_many_ioeventfds(void) |
462 |
{ |
463 |
/* Userspace can use ioeventfd for io notification. This requires a host
|
464 |
* that supports eventfd(2) and an I/O thread; since eventfd does not
|
465 |
* support SIGIO it cannot interrupt the vcpu.
|
466 |
*
|
467 |
* Older kernels have a 6 device limit on the KVM io bus. Find out so we
|
468 |
* can avoid creating too many ioeventfds.
|
469 |
*/
|
470 |
#if defined(CONFIG_EVENTFD) && defined(CONFIG_IOTHREAD)
|
471 |
int ioeventfds[7]; |
472 |
int i, ret = 0; |
473 |
for (i = 0; i < ARRAY_SIZE(ioeventfds); i++) { |
474 |
ioeventfds[i] = eventfd(0, EFD_CLOEXEC);
|
475 |
if (ioeventfds[i] < 0) { |
476 |
break;
|
477 |
} |
478 |
ret = kvm_set_ioeventfd_pio_word(ioeventfds[i], 0, i, true); |
479 |
if (ret < 0) { |
480 |
close(ioeventfds[i]); |
481 |
break;
|
482 |
} |
483 |
} |
484 |
|
485 |
/* Decide whether many devices are supported or not */
|
486 |
ret = i == ARRAY_SIZE(ioeventfds); |
487 |
|
488 |
while (i-- > 0) { |
489 |
kvm_set_ioeventfd_pio_word(ioeventfds[i], 0, i, false); |
490 |
close(ioeventfds[i]); |
491 |
} |
492 |
return ret;
|
493 |
#else
|
494 |
return 0; |
495 |
#endif
|
496 |
} |
497 |
|
498 |
static const KVMCapabilityInfo * |
499 |
kvm_check_extension_list(KVMState *s, const KVMCapabilityInfo *list)
|
500 |
{ |
501 |
while (list->name) {
|
502 |
if (!kvm_check_extension(s, list->value)) {
|
503 |
return list;
|
504 |
} |
505 |
list++; |
506 |
} |
507 |
return NULL; |
508 |
} |
509 |
|
510 |
static void kvm_set_phys_mem(target_phys_addr_t start_addr, ram_addr_t size, |
511 |
ram_addr_t phys_offset) |
512 |
{ |
513 |
KVMState *s = kvm_state; |
514 |
ram_addr_t flags = phys_offset & ~TARGET_PAGE_MASK; |
515 |
KVMSlot *mem, old; |
516 |
int err;
|
517 |
|
518 |
/* kvm works in page size chunks, but the function may be called
|
519 |
with sub-page size and unaligned start address. */
|
520 |
size = TARGET_PAGE_ALIGN(size); |
521 |
start_addr = TARGET_PAGE_ALIGN(start_addr); |
522 |
|
523 |
/* KVM does not support read-only slots */
|
524 |
phys_offset &= ~IO_MEM_ROM; |
525 |
|
526 |
while (1) { |
527 |
mem = kvm_lookup_overlapping_slot(s, start_addr, start_addr + size); |
528 |
if (!mem) {
|
529 |
break;
|
530 |
} |
531 |
|
532 |
if (flags < IO_MEM_UNASSIGNED && start_addr >= mem->start_addr &&
|
533 |
(start_addr + size <= mem->start_addr + mem->memory_size) && |
534 |
(phys_offset - start_addr == mem->phys_offset - mem->start_addr)) { |
535 |
/* The new slot fits into the existing one and comes with
|
536 |
* identical parameters - nothing to be done. */
|
537 |
return;
|
538 |
} |
539 |
|
540 |
old = *mem; |
541 |
|
542 |
/* unregister the overlapping slot */
|
543 |
mem->memory_size = 0;
|
544 |
err = kvm_set_user_memory_region(s, mem); |
545 |
if (err) {
|
546 |
fprintf(stderr, "%s: error unregistering overlapping slot: %s\n",
|
547 |
__func__, strerror(-err)); |
548 |
abort(); |
549 |
} |
550 |
|
551 |
/* Workaround for older KVM versions: we can't join slots, even not by
|
552 |
* unregistering the previous ones and then registering the larger
|
553 |
* slot. We have to maintain the existing fragmentation. Sigh.
|
554 |
*
|
555 |
* This workaround assumes that the new slot starts at the same
|
556 |
* address as the first existing one. If not or if some overlapping
|
557 |
* slot comes around later, we will fail (not seen in practice so far)
|
558 |
* - and actually require a recent KVM version. */
|
559 |
if (s->broken_set_mem_region &&
|
560 |
old.start_addr == start_addr && old.memory_size < size && |
561 |
flags < IO_MEM_UNASSIGNED) { |
562 |
mem = kvm_alloc_slot(s); |
563 |
mem->memory_size = old.memory_size; |
564 |
mem->start_addr = old.start_addr; |
565 |
mem->phys_offset = old.phys_offset; |
566 |
mem->flags = 0;
|
567 |
|
568 |
err = kvm_set_user_memory_region(s, mem); |
569 |
if (err) {
|
570 |
fprintf(stderr, "%s: error updating slot: %s\n", __func__,
|
571 |
strerror(-err)); |
572 |
abort(); |
573 |
} |
574 |
|
575 |
start_addr += old.memory_size; |
576 |
phys_offset += old.memory_size; |
577 |
size -= old.memory_size; |
578 |
continue;
|
579 |
} |
580 |
|
581 |
/* register prefix slot */
|
582 |
if (old.start_addr < start_addr) {
|
583 |
mem = kvm_alloc_slot(s); |
584 |
mem->memory_size = start_addr - old.start_addr; |
585 |
mem->start_addr = old.start_addr; |
586 |
mem->phys_offset = old.phys_offset; |
587 |
mem->flags = 0;
|
588 |
|
589 |
err = kvm_set_user_memory_region(s, mem); |
590 |
if (err) {
|
591 |
fprintf(stderr, "%s: error registering prefix slot: %s\n",
|
592 |
__func__, strerror(-err)); |
593 |
abort(); |
594 |
} |
595 |
} |
596 |
|
597 |
/* register suffix slot */
|
598 |
if (old.start_addr + old.memory_size > start_addr + size) {
|
599 |
ram_addr_t size_delta; |
600 |
|
601 |
mem = kvm_alloc_slot(s); |
602 |
mem->start_addr = start_addr + size; |
603 |
size_delta = mem->start_addr - old.start_addr; |
604 |
mem->memory_size = old.memory_size - size_delta; |
605 |
mem->phys_offset = old.phys_offset + size_delta; |
606 |
mem->flags = 0;
|
607 |
|
608 |
err = kvm_set_user_memory_region(s, mem); |
609 |
if (err) {
|
610 |
fprintf(stderr, "%s: error registering suffix slot: %s\n",
|
611 |
__func__, strerror(-err)); |
612 |
abort(); |
613 |
} |
614 |
} |
615 |
} |
616 |
|
617 |
/* in case the KVM bug workaround already "consumed" the new slot */
|
618 |
if (!size) {
|
619 |
return;
|
620 |
} |
621 |
/* KVM does not need to know about this memory */
|
622 |
if (flags >= IO_MEM_UNASSIGNED) {
|
623 |
return;
|
624 |
} |
625 |
mem = kvm_alloc_slot(s); |
626 |
mem->memory_size = size; |
627 |
mem->start_addr = start_addr; |
628 |
mem->phys_offset = phys_offset; |
629 |
mem->flags = 0;
|
630 |
|
631 |
err = kvm_set_user_memory_region(s, mem); |
632 |
if (err) {
|
633 |
fprintf(stderr, "%s: error registering slot: %s\n", __func__,
|
634 |
strerror(-err)); |
635 |
abort(); |
636 |
} |
637 |
} |
638 |
|
639 |
static void kvm_client_set_memory(struct CPUPhysMemoryClient *client, |
640 |
target_phys_addr_t start_addr, |
641 |
ram_addr_t size, ram_addr_t phys_offset) |
642 |
{ |
643 |
kvm_set_phys_mem(start_addr, size, phys_offset); |
644 |
} |
645 |
|
646 |
static int kvm_client_sync_dirty_bitmap(struct CPUPhysMemoryClient *client, |
647 |
target_phys_addr_t start_addr, |
648 |
target_phys_addr_t end_addr) |
649 |
{ |
650 |
return kvm_physical_sync_dirty_bitmap(start_addr, end_addr);
|
651 |
} |
652 |
|
653 |
static int kvm_client_migration_log(struct CPUPhysMemoryClient *client, |
654 |
int enable)
|
655 |
{ |
656 |
return kvm_set_migration_log(enable);
|
657 |
} |
658 |
|
659 |
static CPUPhysMemoryClient kvm_cpu_phys_memory_client = {
|
660 |
.set_memory = kvm_client_set_memory, |
661 |
.sync_dirty_bitmap = kvm_client_sync_dirty_bitmap, |
662 |
.migration_log = kvm_client_migration_log, |
663 |
.log_start = kvm_log_start, |
664 |
.log_stop = kvm_log_stop, |
665 |
}; |
666 |
|
667 |
static void kvm_handle_interrupt(CPUState *env, int mask) |
668 |
{ |
669 |
env->interrupt_request |= mask; |
670 |
|
671 |
if (!qemu_cpu_is_self(env)) {
|
672 |
qemu_cpu_kick(env); |
673 |
} |
674 |
} |
675 |
|
676 |
int kvm_init(void) |
677 |
{ |
678 |
static const char upgrade_note[] = |
679 |
"Please upgrade to at least kernel 2.6.29 or recent kvm-kmod\n"
|
680 |
"(see http://sourceforge.net/projects/kvm).\n";
|
681 |
KVMState *s; |
682 |
const KVMCapabilityInfo *missing_cap;
|
683 |
int ret;
|
684 |
int i;
|
685 |
|
686 |
s = qemu_mallocz(sizeof(KVMState));
|
687 |
|
688 |
#ifdef KVM_CAP_SET_GUEST_DEBUG
|
689 |
QTAILQ_INIT(&s->kvm_sw_breakpoints); |
690 |
#endif
|
691 |
for (i = 0; i < ARRAY_SIZE(s->slots); i++) { |
692 |
s->slots[i].slot = i; |
693 |
} |
694 |
s->vmfd = -1;
|
695 |
s->fd = qemu_open("/dev/kvm", O_RDWR);
|
696 |
if (s->fd == -1) { |
697 |
fprintf(stderr, "Could not access KVM kernel module: %m\n");
|
698 |
ret = -errno; |
699 |
goto err;
|
700 |
} |
701 |
|
702 |
ret = kvm_ioctl(s, KVM_GET_API_VERSION, 0);
|
703 |
if (ret < KVM_API_VERSION) {
|
704 |
if (ret > 0) { |
705 |
ret = -EINVAL; |
706 |
} |
707 |
fprintf(stderr, "kvm version too old\n");
|
708 |
goto err;
|
709 |
} |
710 |
|
711 |
if (ret > KVM_API_VERSION) {
|
712 |
ret = -EINVAL; |
713 |
fprintf(stderr, "kvm version not supported\n");
|
714 |
goto err;
|
715 |
} |
716 |
|
717 |
s->vmfd = kvm_ioctl(s, KVM_CREATE_VM, 0);
|
718 |
if (s->vmfd < 0) { |
719 |
#ifdef TARGET_S390X
|
720 |
fprintf(stderr, "Please add the 'switch_amode' kernel parameter to "
|
721 |
"your host kernel command line\n");
|
722 |
#endif
|
723 |
goto err;
|
724 |
} |
725 |
|
726 |
missing_cap = kvm_check_extension_list(s, kvm_required_capabilites); |
727 |
if (!missing_cap) {
|
728 |
missing_cap = |
729 |
kvm_check_extension_list(s, kvm_arch_required_capabilities); |
730 |
} |
731 |
if (missing_cap) {
|
732 |
ret = -EINVAL; |
733 |
fprintf(stderr, "kvm does not support %s\n%s",
|
734 |
missing_cap->name, upgrade_note); |
735 |
goto err;
|
736 |
} |
737 |
|
738 |
s->coalesced_mmio = kvm_check_extension(s, KVM_CAP_COALESCED_MMIO); |
739 |
|
740 |
s->broken_set_mem_region = 1;
|
741 |
#ifdef KVM_CAP_JOIN_MEMORY_REGIONS_WORKS
|
742 |
ret = kvm_check_extension(s, KVM_CAP_JOIN_MEMORY_REGIONS_WORKS); |
743 |
if (ret > 0) { |
744 |
s->broken_set_mem_region = 0;
|
745 |
} |
746 |
#endif
|
747 |
|
748 |
s->vcpu_events = 0;
|
749 |
#ifdef KVM_CAP_VCPU_EVENTS
|
750 |
s->vcpu_events = kvm_check_extension(s, KVM_CAP_VCPU_EVENTS); |
751 |
#endif
|
752 |
|
753 |
s->robust_singlestep = 0;
|
754 |
#ifdef KVM_CAP_X86_ROBUST_SINGLESTEP
|
755 |
s->robust_singlestep = |
756 |
kvm_check_extension(s, KVM_CAP_X86_ROBUST_SINGLESTEP); |
757 |
#endif
|
758 |
|
759 |
s->debugregs = 0;
|
760 |
#ifdef KVM_CAP_DEBUGREGS
|
761 |
s->debugregs = kvm_check_extension(s, KVM_CAP_DEBUGREGS); |
762 |
#endif
|
763 |
|
764 |
s->xsave = 0;
|
765 |
#ifdef KVM_CAP_XSAVE
|
766 |
s->xsave = kvm_check_extension(s, KVM_CAP_XSAVE); |
767 |
#endif
|
768 |
|
769 |
s->xcrs = 0;
|
770 |
#ifdef KVM_CAP_XCRS
|
771 |
s->xcrs = kvm_check_extension(s, KVM_CAP_XCRS); |
772 |
#endif
|
773 |
|
774 |
ret = kvm_arch_init(s); |
775 |
if (ret < 0) { |
776 |
goto err;
|
777 |
} |
778 |
|
779 |
kvm_state = s; |
780 |
cpu_register_phys_memory_client(&kvm_cpu_phys_memory_client); |
781 |
|
782 |
s->many_ioeventfds = kvm_check_many_ioeventfds(); |
783 |
|
784 |
cpu_interrupt_handler = kvm_handle_interrupt; |
785 |
|
786 |
return 0; |
787 |
|
788 |
err:
|
789 |
if (s) {
|
790 |
if (s->vmfd != -1) { |
791 |
close(s->vmfd); |
792 |
} |
793 |
if (s->fd != -1) { |
794 |
close(s->fd); |
795 |
} |
796 |
} |
797 |
qemu_free(s); |
798 |
|
799 |
return ret;
|
800 |
} |
801 |
|
802 |
static void kvm_handle_io(uint16_t port, void *data, int direction, int size, |
803 |
uint32_t count) |
804 |
{ |
805 |
int i;
|
806 |
uint8_t *ptr = data; |
807 |
|
808 |
for (i = 0; i < count; i++) { |
809 |
if (direction == KVM_EXIT_IO_IN) {
|
810 |
switch (size) {
|
811 |
case 1: |
812 |
stb_p(ptr, cpu_inb(port)); |
813 |
break;
|
814 |
case 2: |
815 |
stw_p(ptr, cpu_inw(port)); |
816 |
break;
|
817 |
case 4: |
818 |
stl_p(ptr, cpu_inl(port)); |
819 |
break;
|
820 |
} |
821 |
} else {
|
822 |
switch (size) {
|
823 |
case 1: |
824 |
cpu_outb(port, ldub_p(ptr)); |
825 |
break;
|
826 |
case 2: |
827 |
cpu_outw(port, lduw_p(ptr)); |
828 |
break;
|
829 |
case 4: |
830 |
cpu_outl(port, ldl_p(ptr)); |
831 |
break;
|
832 |
} |
833 |
} |
834 |
|
835 |
ptr += size; |
836 |
} |
837 |
} |
838 |
|
839 |
#ifdef KVM_CAP_INTERNAL_ERROR_DATA
|
840 |
static int kvm_handle_internal_error(CPUState *env, struct kvm_run *run) |
841 |
{ |
842 |
fprintf(stderr, "KVM internal error.");
|
843 |
if (kvm_check_extension(kvm_state, KVM_CAP_INTERNAL_ERROR_DATA)) {
|
844 |
int i;
|
845 |
|
846 |
fprintf(stderr, " Suberror: %d\n", run->internal.suberror);
|
847 |
for (i = 0; i < run->internal.ndata; ++i) { |
848 |
fprintf(stderr, "extra data[%d]: %"PRIx64"\n", |
849 |
i, (uint64_t)run->internal.data[i]); |
850 |
} |
851 |
} else {
|
852 |
fprintf(stderr, "\n");
|
853 |
} |
854 |
if (run->internal.suberror == KVM_INTERNAL_ERROR_EMULATION) {
|
855 |
fprintf(stderr, "emulation failure\n");
|
856 |
if (!kvm_arch_stop_on_emulation_error(env)) {
|
857 |
cpu_dump_state(env, stderr, fprintf, CPU_DUMP_CODE); |
858 |
return EXCP_INTERRUPT;
|
859 |
} |
860 |
} |
861 |
/* FIXME: Should trigger a qmp message to let management know
|
862 |
* something went wrong.
|
863 |
*/
|
864 |
return -1; |
865 |
} |
866 |
#endif
|
867 |
|
868 |
void kvm_flush_coalesced_mmio_buffer(void) |
869 |
{ |
870 |
KVMState *s = kvm_state; |
871 |
if (s->coalesced_mmio_ring) {
|
872 |
struct kvm_coalesced_mmio_ring *ring = s->coalesced_mmio_ring;
|
873 |
while (ring->first != ring->last) {
|
874 |
struct kvm_coalesced_mmio *ent;
|
875 |
|
876 |
ent = &ring->coalesced_mmio[ring->first]; |
877 |
|
878 |
cpu_physical_memory_write(ent->phys_addr, ent->data, ent->len); |
879 |
smp_wmb(); |
880 |
ring->first = (ring->first + 1) % KVM_COALESCED_MMIO_MAX;
|
881 |
} |
882 |
} |
883 |
} |
884 |
|
885 |
static void do_kvm_cpu_synchronize_state(void *_env) |
886 |
{ |
887 |
CPUState *env = _env; |
888 |
|
889 |
if (!env->kvm_vcpu_dirty) {
|
890 |
kvm_arch_get_registers(env); |
891 |
env->kvm_vcpu_dirty = 1;
|
892 |
} |
893 |
} |
894 |
|
895 |
void kvm_cpu_synchronize_state(CPUState *env)
|
896 |
{ |
897 |
if (!env->kvm_vcpu_dirty) {
|
898 |
run_on_cpu(env, do_kvm_cpu_synchronize_state, env); |
899 |
} |
900 |
} |
901 |
|
902 |
void kvm_cpu_synchronize_post_reset(CPUState *env)
|
903 |
{ |
904 |
kvm_arch_put_registers(env, KVM_PUT_RESET_STATE); |
905 |
env->kvm_vcpu_dirty = 0;
|
906 |
} |
907 |
|
908 |
void kvm_cpu_synchronize_post_init(CPUState *env)
|
909 |
{ |
910 |
kvm_arch_put_registers(env, KVM_PUT_FULL_STATE); |
911 |
env->kvm_vcpu_dirty = 0;
|
912 |
} |
913 |
|
914 |
int kvm_cpu_exec(CPUState *env)
|
915 |
{ |
916 |
struct kvm_run *run = env->kvm_run;
|
917 |
int ret, run_ret;
|
918 |
|
919 |
DPRINTF("kvm_cpu_exec()\n");
|
920 |
|
921 |
if (kvm_arch_process_async_events(env)) {
|
922 |
env->exit_request = 0;
|
923 |
return EXCP_HLT;
|
924 |
} |
925 |
|
926 |
cpu_single_env = env; |
927 |
|
928 |
do {
|
929 |
if (env->kvm_vcpu_dirty) {
|
930 |
kvm_arch_put_registers(env, KVM_PUT_RUNTIME_STATE); |
931 |
env->kvm_vcpu_dirty = 0;
|
932 |
} |
933 |
|
934 |
kvm_arch_pre_run(env, run); |
935 |
if (env->exit_request) {
|
936 |
DPRINTF("interrupt exit requested\n");
|
937 |
/*
|
938 |
* KVM requires us to reenter the kernel after IO exits to complete
|
939 |
* instruction emulation. This self-signal will ensure that we
|
940 |
* leave ASAP again.
|
941 |
*/
|
942 |
qemu_cpu_kick_self(); |
943 |
} |
944 |
cpu_single_env = NULL;
|
945 |
qemu_mutex_unlock_iothread(); |
946 |
|
947 |
run_ret = kvm_vcpu_ioctl(env, KVM_RUN, 0);
|
948 |
|
949 |
qemu_mutex_lock_iothread(); |
950 |
cpu_single_env = env; |
951 |
kvm_arch_post_run(env, run); |
952 |
|
953 |
kvm_flush_coalesced_mmio_buffer(); |
954 |
|
955 |
if (run_ret < 0) { |
956 |
if (run_ret == -EINTR || run_ret == -EAGAIN) {
|
957 |
DPRINTF("io window exit\n");
|
958 |
ret = EXCP_INTERRUPT; |
959 |
break;
|
960 |
} |
961 |
DPRINTF("kvm run failed %s\n", strerror(-run_ret));
|
962 |
abort(); |
963 |
} |
964 |
|
965 |
switch (run->exit_reason) {
|
966 |
case KVM_EXIT_IO:
|
967 |
DPRINTF("handle_io\n");
|
968 |
kvm_handle_io(run->io.port, |
969 |
(uint8_t *)run + run->io.data_offset, |
970 |
run->io.direction, |
971 |
run->io.size, |
972 |
run->io.count); |
973 |
ret = 0;
|
974 |
break;
|
975 |
case KVM_EXIT_MMIO:
|
976 |
DPRINTF("handle_mmio\n");
|
977 |
cpu_physical_memory_rw(run->mmio.phys_addr, |
978 |
run->mmio.data, |
979 |
run->mmio.len, |
980 |
run->mmio.is_write); |
981 |
ret = 0;
|
982 |
break;
|
983 |
case KVM_EXIT_IRQ_WINDOW_OPEN:
|
984 |
DPRINTF("irq_window_open\n");
|
985 |
ret = EXCP_INTERRUPT; |
986 |
break;
|
987 |
case KVM_EXIT_SHUTDOWN:
|
988 |
DPRINTF("shutdown\n");
|
989 |
qemu_system_reset_request(); |
990 |
ret = EXCP_INTERRUPT; |
991 |
break;
|
992 |
case KVM_EXIT_UNKNOWN:
|
993 |
fprintf(stderr, "KVM: unknown exit, hardware reason %" PRIx64 "\n", |
994 |
(uint64_t)run->hw.hardware_exit_reason); |
995 |
ret = -1;
|
996 |
break;
|
997 |
#ifdef KVM_CAP_INTERNAL_ERROR_DATA
|
998 |
case KVM_EXIT_INTERNAL_ERROR:
|
999 |
ret = kvm_handle_internal_error(env, run); |
1000 |
break;
|
1001 |
#endif
|
1002 |
default:
|
1003 |
DPRINTF("kvm_arch_handle_exit\n");
|
1004 |
ret = kvm_arch_handle_exit(env, run); |
1005 |
break;
|
1006 |
} |
1007 |
} while (ret == 0); |
1008 |
|
1009 |
if (ret < 0) { |
1010 |
cpu_dump_state(env, stderr, fprintf, CPU_DUMP_CODE); |
1011 |
vm_stop(VMSTOP_PANIC); |
1012 |
} |
1013 |
|
1014 |
env->exit_request = 0;
|
1015 |
cpu_single_env = NULL;
|
1016 |
return ret;
|
1017 |
} |
1018 |
|
1019 |
int kvm_ioctl(KVMState *s, int type, ...) |
1020 |
{ |
1021 |
int ret;
|
1022 |
void *arg;
|
1023 |
va_list ap; |
1024 |
|
1025 |
va_start(ap, type); |
1026 |
arg = va_arg(ap, void *);
|
1027 |
va_end(ap); |
1028 |
|
1029 |
ret = ioctl(s->fd, type, arg); |
1030 |
if (ret == -1) { |
1031 |
ret = -errno; |
1032 |
} |
1033 |
return ret;
|
1034 |
} |
1035 |
|
1036 |
int kvm_vm_ioctl(KVMState *s, int type, ...) |
1037 |
{ |
1038 |
int ret;
|
1039 |
void *arg;
|
1040 |
va_list ap; |
1041 |
|
1042 |
va_start(ap, type); |
1043 |
arg = va_arg(ap, void *);
|
1044 |
va_end(ap); |
1045 |
|
1046 |
ret = ioctl(s->vmfd, type, arg); |
1047 |
if (ret == -1) { |
1048 |
ret = -errno; |
1049 |
} |
1050 |
return ret;
|
1051 |
} |
1052 |
|
1053 |
int kvm_vcpu_ioctl(CPUState *env, int type, ...) |
1054 |
{ |
1055 |
int ret;
|
1056 |
void *arg;
|
1057 |
va_list ap; |
1058 |
|
1059 |
va_start(ap, type); |
1060 |
arg = va_arg(ap, void *);
|
1061 |
va_end(ap); |
1062 |
|
1063 |
ret = ioctl(env->kvm_fd, type, arg); |
1064 |
if (ret == -1) { |
1065 |
ret = -errno; |
1066 |
} |
1067 |
return ret;
|
1068 |
} |
1069 |
|
1070 |
int kvm_has_sync_mmu(void) |
1071 |
{ |
1072 |
return kvm_check_extension(kvm_state, KVM_CAP_SYNC_MMU);
|
1073 |
} |
1074 |
|
1075 |
int kvm_has_vcpu_events(void) |
1076 |
{ |
1077 |
return kvm_state->vcpu_events;
|
1078 |
} |
1079 |
|
1080 |
int kvm_has_robust_singlestep(void) |
1081 |
{ |
1082 |
return kvm_state->robust_singlestep;
|
1083 |
} |
1084 |
|
1085 |
int kvm_has_debugregs(void) |
1086 |
{ |
1087 |
return kvm_state->debugregs;
|
1088 |
} |
1089 |
|
1090 |
int kvm_has_xsave(void) |
1091 |
{ |
1092 |
return kvm_state->xsave;
|
1093 |
} |
1094 |
|
1095 |
int kvm_has_xcrs(void) |
1096 |
{ |
1097 |
return kvm_state->xcrs;
|
1098 |
} |
1099 |
|
1100 |
int kvm_has_many_ioeventfds(void) |
1101 |
{ |
1102 |
if (!kvm_enabled()) {
|
1103 |
return 0; |
1104 |
} |
1105 |
return kvm_state->many_ioeventfds;
|
1106 |
} |
1107 |
|
1108 |
void kvm_setup_guest_memory(void *start, size_t size) |
1109 |
{ |
1110 |
if (!kvm_has_sync_mmu()) {
|
1111 |
int ret = qemu_madvise(start, size, QEMU_MADV_DONTFORK);
|
1112 |
|
1113 |
if (ret) {
|
1114 |
perror("qemu_madvise");
|
1115 |
fprintf(stderr, |
1116 |
"Need MADV_DONTFORK in absence of synchronous KVM MMU\n");
|
1117 |
exit(1);
|
1118 |
} |
1119 |
} |
1120 |
} |
1121 |
|
1122 |
#ifdef KVM_CAP_SET_GUEST_DEBUG
|
1123 |
struct kvm_sw_breakpoint *kvm_find_sw_breakpoint(CPUState *env,
|
1124 |
target_ulong pc) |
1125 |
{ |
1126 |
struct kvm_sw_breakpoint *bp;
|
1127 |
|
1128 |
QTAILQ_FOREACH(bp, &env->kvm_state->kvm_sw_breakpoints, entry) { |
1129 |
if (bp->pc == pc) {
|
1130 |
return bp;
|
1131 |
} |
1132 |
} |
1133 |
return NULL; |
1134 |
} |
1135 |
|
1136 |
int kvm_sw_breakpoints_active(CPUState *env)
|
1137 |
{ |
1138 |
return !QTAILQ_EMPTY(&env->kvm_state->kvm_sw_breakpoints);
|
1139 |
} |
1140 |
|
1141 |
struct kvm_set_guest_debug_data {
|
1142 |
struct kvm_guest_debug dbg;
|
1143 |
CPUState *env; |
1144 |
int err;
|
1145 |
}; |
1146 |
|
1147 |
static void kvm_invoke_set_guest_debug(void *data) |
1148 |
{ |
1149 |
struct kvm_set_guest_debug_data *dbg_data = data;
|
1150 |
CPUState *env = dbg_data->env; |
1151 |
|
1152 |
dbg_data->err = kvm_vcpu_ioctl(env, KVM_SET_GUEST_DEBUG, &dbg_data->dbg); |
1153 |
} |
1154 |
|
1155 |
int kvm_update_guest_debug(CPUState *env, unsigned long reinject_trap) |
1156 |
{ |
1157 |
struct kvm_set_guest_debug_data data;
|
1158 |
|
1159 |
data.dbg.control = reinject_trap; |
1160 |
|
1161 |
if (env->singlestep_enabled) {
|
1162 |
data.dbg.control |= KVM_GUESTDBG_ENABLE | KVM_GUESTDBG_SINGLESTEP; |
1163 |
} |
1164 |
kvm_arch_update_guest_debug(env, &data.dbg); |
1165 |
data.env = env; |
1166 |
|
1167 |
run_on_cpu(env, kvm_invoke_set_guest_debug, &data); |
1168 |
return data.err;
|
1169 |
} |
1170 |
|
1171 |
int kvm_insert_breakpoint(CPUState *current_env, target_ulong addr,
|
1172 |
target_ulong len, int type)
|
1173 |
{ |
1174 |
struct kvm_sw_breakpoint *bp;
|
1175 |
CPUState *env; |
1176 |
int err;
|
1177 |
|
1178 |
if (type == GDB_BREAKPOINT_SW) {
|
1179 |
bp = kvm_find_sw_breakpoint(current_env, addr); |
1180 |
if (bp) {
|
1181 |
bp->use_count++; |
1182 |
return 0; |
1183 |
} |
1184 |
|
1185 |
bp = qemu_malloc(sizeof(struct kvm_sw_breakpoint)); |
1186 |
if (!bp) {
|
1187 |
return -ENOMEM;
|
1188 |
} |
1189 |
|
1190 |
bp->pc = addr; |
1191 |
bp->use_count = 1;
|
1192 |
err = kvm_arch_insert_sw_breakpoint(current_env, bp); |
1193 |
if (err) {
|
1194 |
qemu_free(bp); |
1195 |
return err;
|
1196 |
} |
1197 |
|
1198 |
QTAILQ_INSERT_HEAD(¤t_env->kvm_state->kvm_sw_breakpoints, |
1199 |
bp, entry); |
1200 |
} else {
|
1201 |
err = kvm_arch_insert_hw_breakpoint(addr, len, type); |
1202 |
if (err) {
|
1203 |
return err;
|
1204 |
} |
1205 |
} |
1206 |
|
1207 |
for (env = first_cpu; env != NULL; env = env->next_cpu) { |
1208 |
err = kvm_update_guest_debug(env, 0);
|
1209 |
if (err) {
|
1210 |
return err;
|
1211 |
} |
1212 |
} |
1213 |
return 0; |
1214 |
} |
1215 |
|
1216 |
int kvm_remove_breakpoint(CPUState *current_env, target_ulong addr,
|
1217 |
target_ulong len, int type)
|
1218 |
{ |
1219 |
struct kvm_sw_breakpoint *bp;
|
1220 |
CPUState *env; |
1221 |
int err;
|
1222 |
|
1223 |
if (type == GDB_BREAKPOINT_SW) {
|
1224 |
bp = kvm_find_sw_breakpoint(current_env, addr); |
1225 |
if (!bp) {
|
1226 |
return -ENOENT;
|
1227 |
} |
1228 |
|
1229 |
if (bp->use_count > 1) { |
1230 |
bp->use_count--; |
1231 |
return 0; |
1232 |
} |
1233 |
|
1234 |
err = kvm_arch_remove_sw_breakpoint(current_env, bp); |
1235 |
if (err) {
|
1236 |
return err;
|
1237 |
} |
1238 |
|
1239 |
QTAILQ_REMOVE(¤t_env->kvm_state->kvm_sw_breakpoints, bp, entry); |
1240 |
qemu_free(bp); |
1241 |
} else {
|
1242 |
err = kvm_arch_remove_hw_breakpoint(addr, len, type); |
1243 |
if (err) {
|
1244 |
return err;
|
1245 |
} |
1246 |
} |
1247 |
|
1248 |
for (env = first_cpu; env != NULL; env = env->next_cpu) { |
1249 |
err = kvm_update_guest_debug(env, 0);
|
1250 |
if (err) {
|
1251 |
return err;
|
1252 |
} |
1253 |
} |
1254 |
return 0; |
1255 |
} |
1256 |
|
1257 |
void kvm_remove_all_breakpoints(CPUState *current_env)
|
1258 |
{ |
1259 |
struct kvm_sw_breakpoint *bp, *next;
|
1260 |
KVMState *s = current_env->kvm_state; |
1261 |
CPUState *env; |
1262 |
|
1263 |
QTAILQ_FOREACH_SAFE(bp, &s->kvm_sw_breakpoints, entry, next) { |
1264 |
if (kvm_arch_remove_sw_breakpoint(current_env, bp) != 0) { |
1265 |
/* Try harder to find a CPU that currently sees the breakpoint. */
|
1266 |
for (env = first_cpu; env != NULL; env = env->next_cpu) { |
1267 |
if (kvm_arch_remove_sw_breakpoint(env, bp) == 0) { |
1268 |
break;
|
1269 |
} |
1270 |
} |
1271 |
} |
1272 |
} |
1273 |
kvm_arch_remove_all_hw_breakpoints(); |
1274 |
|
1275 |
for (env = first_cpu; env != NULL; env = env->next_cpu) { |
1276 |
kvm_update_guest_debug(env, 0);
|
1277 |
} |
1278 |
} |
1279 |
|
1280 |
#else /* !KVM_CAP_SET_GUEST_DEBUG */ |
1281 |
|
1282 |
int kvm_update_guest_debug(CPUState *env, unsigned long reinject_trap) |
1283 |
{ |
1284 |
return -EINVAL;
|
1285 |
} |
1286 |
|
1287 |
int kvm_insert_breakpoint(CPUState *current_env, target_ulong addr,
|
1288 |
target_ulong len, int type)
|
1289 |
{ |
1290 |
return -EINVAL;
|
1291 |
} |
1292 |
|
1293 |
int kvm_remove_breakpoint(CPUState *current_env, target_ulong addr,
|
1294 |
target_ulong len, int type)
|
1295 |
{ |
1296 |
return -EINVAL;
|
1297 |
} |
1298 |
|
1299 |
void kvm_remove_all_breakpoints(CPUState *current_env)
|
1300 |
{ |
1301 |
} |
1302 |
#endif /* !KVM_CAP_SET_GUEST_DEBUG */ |
1303 |
|
1304 |
int kvm_set_signal_mask(CPUState *env, const sigset_t *sigset) |
1305 |
{ |
1306 |
struct kvm_signal_mask *sigmask;
|
1307 |
int r;
|
1308 |
|
1309 |
if (!sigset) {
|
1310 |
return kvm_vcpu_ioctl(env, KVM_SET_SIGNAL_MASK, NULL); |
1311 |
} |
1312 |
|
1313 |
sigmask = qemu_malloc(sizeof(*sigmask) + sizeof(*sigset)); |
1314 |
|
1315 |
sigmask->len = 8;
|
1316 |
memcpy(sigmask->sigset, sigset, sizeof(*sigset));
|
1317 |
r = kvm_vcpu_ioctl(env, KVM_SET_SIGNAL_MASK, sigmask); |
1318 |
qemu_free(sigmask); |
1319 |
|
1320 |
return r;
|
1321 |
} |
1322 |
|
1323 |
int kvm_set_ioeventfd_mmio_long(int fd, uint32_t addr, uint32_t val, bool assign) |
1324 |
{ |
1325 |
#ifdef KVM_IOEVENTFD
|
1326 |
int ret;
|
1327 |
struct kvm_ioeventfd iofd;
|
1328 |
|
1329 |
iofd.datamatch = val; |
1330 |
iofd.addr = addr; |
1331 |
iofd.len = 4;
|
1332 |
iofd.flags = KVM_IOEVENTFD_FLAG_DATAMATCH; |
1333 |
iofd.fd = fd; |
1334 |
|
1335 |
if (!kvm_enabled()) {
|
1336 |
return -ENOSYS;
|
1337 |
} |
1338 |
|
1339 |
if (!assign) {
|
1340 |
iofd.flags |= KVM_IOEVENTFD_FLAG_DEASSIGN; |
1341 |
} |
1342 |
|
1343 |
ret = kvm_vm_ioctl(kvm_state, KVM_IOEVENTFD, &iofd); |
1344 |
|
1345 |
if (ret < 0) { |
1346 |
return -errno;
|
1347 |
} |
1348 |
|
1349 |
return 0; |
1350 |
#else
|
1351 |
return -ENOSYS;
|
1352 |
#endif
|
1353 |
} |
1354 |
|
1355 |
int kvm_set_ioeventfd_pio_word(int fd, uint16_t addr, uint16_t val, bool assign) |
1356 |
{ |
1357 |
#ifdef KVM_IOEVENTFD
|
1358 |
struct kvm_ioeventfd kick = {
|
1359 |
.datamatch = val, |
1360 |
.addr = addr, |
1361 |
.len = 2,
|
1362 |
.flags = KVM_IOEVENTFD_FLAG_DATAMATCH | KVM_IOEVENTFD_FLAG_PIO, |
1363 |
.fd = fd, |
1364 |
}; |
1365 |
int r;
|
1366 |
if (!kvm_enabled()) {
|
1367 |
return -ENOSYS;
|
1368 |
} |
1369 |
if (!assign) {
|
1370 |
kick.flags |= KVM_IOEVENTFD_FLAG_DEASSIGN; |
1371 |
} |
1372 |
r = kvm_vm_ioctl(kvm_state, KVM_IOEVENTFD, &kick); |
1373 |
if (r < 0) { |
1374 |
return r;
|
1375 |
} |
1376 |
return 0; |
1377 |
#else
|
1378 |
return -ENOSYS;
|
1379 |
#endif
|
1380 |
} |
1381 |
|
1382 |
int kvm_on_sigbus_vcpu(CPUState *env, int code, void *addr) |
1383 |
{ |
1384 |
return kvm_arch_on_sigbus_vcpu(env, code, addr);
|
1385 |
} |
1386 |
|
1387 |
int kvm_on_sigbus(int code, void *addr) |
1388 |
{ |
1389 |
return kvm_arch_on_sigbus(code, addr);
|
1390 |
} |