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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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|
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#include <linux/kvm.h> |
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|
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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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|
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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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|
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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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|
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//#define DEBUG_KVM
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|
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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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|
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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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|
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typedef struct kvm_dirty_log KVMDirtyLog; |
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|
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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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}; |
80 |
|
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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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|
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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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|
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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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|
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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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|
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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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|
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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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|
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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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|
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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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} |
144 |
|
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return found;
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} |
147 |
|
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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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|
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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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|
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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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} |
162 |
|
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return 0; |
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} |
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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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|
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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; |
177 |
} |
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return kvm_vm_ioctl(s, KVM_SET_USER_MEMORY_REGION, &mem);
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} |
180 |
|
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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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|
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kvm_arch_reset_vcpu(env); |
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} |
187 |
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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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} |
192 |
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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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} |
197 |
|
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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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} |
211 |
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env->kvm_fd = ret; |
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env->kvm_state = s; |
214 |
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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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} |
221 |
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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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} |
229 |
|
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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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} |
260 |
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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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} |
270 |
if (flags == old_flags) {
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return 0; |
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} |
273 |
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return kvm_set_user_memory_region(s, mem);
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} |
276 |
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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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} |
283 |
|
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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) |
286 |
{ |
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return kvm_dirty_pages_log_change(phys_addr, size, 0, |
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KVM_MEM_LOG_DIRTY_PAGES); |
289 |
} |
290 |
|
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static int kvm_set_migration_log(int enable) |
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{ |
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KVMState *s = kvm_state; |
294 |
KVMSlot *mem; |
295 |
int i, err;
|
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|
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s->migration_log = enable; |
298 |
|
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for (i = 0; i < ARRAY_SIZE(s->slots); i++) { |
300 |
mem = &s->slots[i]; |
301 |
|
302 |
if (!mem->memory_size) {
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continue;
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} |
305 |
if (!!(mem->flags & KVM_MEM_LOG_DIRTY_PAGES) == enable) {
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continue;
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} |
308 |
err = kvm_set_user_memory_region(s, mem); |
309 |
if (err) {
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return err;
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311 |
} |
312 |
} |
313 |
return 0; |
314 |
} |
315 |
|
316 |
/* get kvm's dirty pages bitmap and update qemu's */
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317 |
static int kvm_get_dirty_pages_log_range(unsigned long start_addr, |
318 |
unsigned long *bitmap, |
319 |
unsigned long offset, |
320 |
unsigned long mem_size) |
321 |
{ |
322 |
unsigned int i, j; |
323 |
unsigned long page_number, addr, addr1, c; |
324 |
ram_addr_t ram_addr; |
325 |
unsigned int len = ((mem_size / TARGET_PAGE_SIZE) + HOST_LONG_BITS - 1) / |
326 |
HOST_LONG_BITS; |
327 |
|
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/*
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* bitmap-traveling is faster than memory-traveling (for addr...)
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330 |
* especially when most of the memory is not dirty.
|
331 |
*/
|
332 |
for (i = 0; i < len; i++) { |
333 |
if (bitmap[i] != 0) { |
334 |
c = leul_to_cpu(bitmap[i]); |
335 |
do {
|
336 |
j = ffsl(c) - 1;
|
337 |
c &= ~(1ul << j);
|
338 |
page_number = i * HOST_LONG_BITS + j; |
339 |
addr1 = page_number * TARGET_PAGE_SIZE; |
340 |
addr = offset + addr1; |
341 |
ram_addr = cpu_get_physical_page_desc(addr); |
342 |
cpu_physical_memory_set_dirty(ram_addr); |
343 |
} while (c != 0); |
344 |
} |
345 |
} |
346 |
return 0; |
347 |
} |
348 |
|
349 |
#define ALIGN(x, y) (((x)+(y)-1) & ~((y)-1)) |
350 |
|
351 |
/**
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352 |
* kvm_physical_sync_dirty_bitmap - Grab dirty bitmap from kernel space
|
353 |
* This function updates qemu's dirty bitmap using cpu_physical_memory_set_dirty().
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354 |
* This means all bits are set to dirty.
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355 |
*
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356 |
* @start_add: start of logged region.
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357 |
* @end_addr: end of logged region.
|
358 |
*/
|
359 |
static int kvm_physical_sync_dirty_bitmap(target_phys_addr_t start_addr, |
360 |
target_phys_addr_t end_addr) |
361 |
{ |
362 |
KVMState *s = kvm_state; |
363 |
unsigned long size, allocated_size = 0; |
364 |
KVMDirtyLog d; |
365 |
KVMSlot *mem; |
366 |
int ret = 0; |
367 |
|
368 |
d.dirty_bitmap = NULL;
|
369 |
while (start_addr < end_addr) {
|
370 |
mem = kvm_lookup_overlapping_slot(s, start_addr, end_addr); |
371 |
if (mem == NULL) { |
372 |
break;
|
373 |
} |
374 |
|
375 |
size = ALIGN(((mem->memory_size) >> TARGET_PAGE_BITS), HOST_LONG_BITS) / 8;
|
376 |
if (!d.dirty_bitmap) {
|
377 |
d.dirty_bitmap = qemu_malloc(size); |
378 |
} else if (size > allocated_size) { |
379 |
d.dirty_bitmap = qemu_realloc(d.dirty_bitmap, size); |
380 |
} |
381 |
allocated_size = size; |
382 |
memset(d.dirty_bitmap, 0, allocated_size);
|
383 |
|
384 |
d.slot = mem->slot; |
385 |
|
386 |
if (kvm_vm_ioctl(s, KVM_GET_DIRTY_LOG, &d) == -1) { |
387 |
DPRINTF("ioctl failed %d\n", errno);
|
388 |
ret = -1;
|
389 |
break;
|
390 |
} |
391 |
|
392 |
kvm_get_dirty_pages_log_range(mem->start_addr, d.dirty_bitmap, |
393 |
mem->start_addr, mem->memory_size); |
394 |
start_addr = mem->start_addr + mem->memory_size; |
395 |
} |
396 |
qemu_free(d.dirty_bitmap); |
397 |
|
398 |
return ret;
|
399 |
} |
400 |
|
401 |
int kvm_coalesce_mmio_region(target_phys_addr_t start, ram_addr_t size)
|
402 |
{ |
403 |
int ret = -ENOSYS;
|
404 |
KVMState *s = kvm_state; |
405 |
|
406 |
if (s->coalesced_mmio) {
|
407 |
struct kvm_coalesced_mmio_zone zone;
|
408 |
|
409 |
zone.addr = start; |
410 |
zone.size = size; |
411 |
|
412 |
ret = kvm_vm_ioctl(s, KVM_REGISTER_COALESCED_MMIO, &zone); |
413 |
} |
414 |
|
415 |
return ret;
|
416 |
} |
417 |
|
418 |
int kvm_uncoalesce_mmio_region(target_phys_addr_t start, ram_addr_t size)
|
419 |
{ |
420 |
int ret = -ENOSYS;
|
421 |
KVMState *s = kvm_state; |
422 |
|
423 |
if (s->coalesced_mmio) {
|
424 |
struct kvm_coalesced_mmio_zone zone;
|
425 |
|
426 |
zone.addr = start; |
427 |
zone.size = size; |
428 |
|
429 |
ret = kvm_vm_ioctl(s, KVM_UNREGISTER_COALESCED_MMIO, &zone); |
430 |
} |
431 |
|
432 |
return ret;
|
433 |
} |
434 |
|
435 |
int kvm_check_extension(KVMState *s, unsigned int extension) |
436 |
{ |
437 |
int ret;
|
438 |
|
439 |
ret = kvm_ioctl(s, KVM_CHECK_EXTENSION, extension); |
440 |
if (ret < 0) { |
441 |
ret = 0;
|
442 |
} |
443 |
|
444 |
return ret;
|
445 |
} |
446 |
|
447 |
static int kvm_check_many_ioeventfds(void) |
448 |
{ |
449 |
/* Userspace can use ioeventfd for io notification. This requires a host
|
450 |
* that supports eventfd(2) and an I/O thread; since eventfd does not
|
451 |
* support SIGIO it cannot interrupt the vcpu.
|
452 |
*
|
453 |
* Older kernels have a 6 device limit on the KVM io bus. Find out so we
|
454 |
* can avoid creating too many ioeventfds.
|
455 |
*/
|
456 |
#if defined(CONFIG_EVENTFD) && defined(CONFIG_IOTHREAD)
|
457 |
int ioeventfds[7]; |
458 |
int i, ret = 0; |
459 |
for (i = 0; i < ARRAY_SIZE(ioeventfds); i++) { |
460 |
ioeventfds[i] = eventfd(0, EFD_CLOEXEC);
|
461 |
if (ioeventfds[i] < 0) { |
462 |
break;
|
463 |
} |
464 |
ret = kvm_set_ioeventfd_pio_word(ioeventfds[i], 0, i, true); |
465 |
if (ret < 0) { |
466 |
close(ioeventfds[i]); |
467 |
break;
|
468 |
} |
469 |
} |
470 |
|
471 |
/* Decide whether many devices are supported or not */
|
472 |
ret = i == ARRAY_SIZE(ioeventfds); |
473 |
|
474 |
while (i-- > 0) { |
475 |
kvm_set_ioeventfd_pio_word(ioeventfds[i], 0, i, false); |
476 |
close(ioeventfds[i]); |
477 |
} |
478 |
return ret;
|
479 |
#else
|
480 |
return 0; |
481 |
#endif
|
482 |
} |
483 |
|
484 |
static const KVMCapabilityInfo * |
485 |
kvm_check_extension_list(KVMState *s, const KVMCapabilityInfo *list)
|
486 |
{ |
487 |
while (list->name) {
|
488 |
if (!kvm_check_extension(s, list->value)) {
|
489 |
return list;
|
490 |
} |
491 |
list++; |
492 |
} |
493 |
return NULL; |
494 |
} |
495 |
|
496 |
static void kvm_set_phys_mem(target_phys_addr_t start_addr, ram_addr_t size, |
497 |
ram_addr_t phys_offset) |
498 |
{ |
499 |
KVMState *s = kvm_state; |
500 |
ram_addr_t flags = phys_offset & ~TARGET_PAGE_MASK; |
501 |
KVMSlot *mem, old; |
502 |
int err;
|
503 |
|
504 |
/* kvm works in page size chunks, but the function may be called
|
505 |
with sub-page size and unaligned start address. */
|
506 |
size = TARGET_PAGE_ALIGN(size); |
507 |
start_addr = TARGET_PAGE_ALIGN(start_addr); |
508 |
|
509 |
/* KVM does not support read-only slots */
|
510 |
phys_offset &= ~IO_MEM_ROM; |
511 |
|
512 |
while (1) { |
513 |
mem = kvm_lookup_overlapping_slot(s, start_addr, start_addr + size); |
514 |
if (!mem) {
|
515 |
break;
|
516 |
} |
517 |
|
518 |
if (flags < IO_MEM_UNASSIGNED && start_addr >= mem->start_addr &&
|
519 |
(start_addr + size <= mem->start_addr + mem->memory_size) && |
520 |
(phys_offset - start_addr == mem->phys_offset - mem->start_addr)) { |
521 |
/* The new slot fits into the existing one and comes with
|
522 |
* identical parameters - nothing to be done. */
|
523 |
return;
|
524 |
} |
525 |
|
526 |
old = *mem; |
527 |
|
528 |
/* unregister the overlapping slot */
|
529 |
mem->memory_size = 0;
|
530 |
err = kvm_set_user_memory_region(s, mem); |
531 |
if (err) {
|
532 |
fprintf(stderr, "%s: error unregistering overlapping slot: %s\n",
|
533 |
__func__, strerror(-err)); |
534 |
abort(); |
535 |
} |
536 |
|
537 |
/* Workaround for older KVM versions: we can't join slots, even not by
|
538 |
* unregistering the previous ones and then registering the larger
|
539 |
* slot. We have to maintain the existing fragmentation. Sigh.
|
540 |
*
|
541 |
* This workaround assumes that the new slot starts at the same
|
542 |
* address as the first existing one. If not or if some overlapping
|
543 |
* slot comes around later, we will fail (not seen in practice so far)
|
544 |
* - and actually require a recent KVM version. */
|
545 |
if (s->broken_set_mem_region &&
|
546 |
old.start_addr == start_addr && old.memory_size < size && |
547 |
flags < IO_MEM_UNASSIGNED) { |
548 |
mem = kvm_alloc_slot(s); |
549 |
mem->memory_size = old.memory_size; |
550 |
mem->start_addr = old.start_addr; |
551 |
mem->phys_offset = old.phys_offset; |
552 |
mem->flags = 0;
|
553 |
|
554 |
err = kvm_set_user_memory_region(s, mem); |
555 |
if (err) {
|
556 |
fprintf(stderr, "%s: error updating slot: %s\n", __func__,
|
557 |
strerror(-err)); |
558 |
abort(); |
559 |
} |
560 |
|
561 |
start_addr += old.memory_size; |
562 |
phys_offset += old.memory_size; |
563 |
size -= old.memory_size; |
564 |
continue;
|
565 |
} |
566 |
|
567 |
/* register prefix slot */
|
568 |
if (old.start_addr < start_addr) {
|
569 |
mem = kvm_alloc_slot(s); |
570 |
mem->memory_size = start_addr - old.start_addr; |
571 |
mem->start_addr = old.start_addr; |
572 |
mem->phys_offset = old.phys_offset; |
573 |
mem->flags = 0;
|
574 |
|
575 |
err = kvm_set_user_memory_region(s, mem); |
576 |
if (err) {
|
577 |
fprintf(stderr, "%s: error registering prefix slot: %s\n",
|
578 |
__func__, strerror(-err)); |
579 |
abort(); |
580 |
} |
581 |
} |
582 |
|
583 |
/* register suffix slot */
|
584 |
if (old.start_addr + old.memory_size > start_addr + size) {
|
585 |
ram_addr_t size_delta; |
586 |
|
587 |
mem = kvm_alloc_slot(s); |
588 |
mem->start_addr = start_addr + size; |
589 |
size_delta = mem->start_addr - old.start_addr; |
590 |
mem->memory_size = old.memory_size - size_delta; |
591 |
mem->phys_offset = old.phys_offset + size_delta; |
592 |
mem->flags = 0;
|
593 |
|
594 |
err = kvm_set_user_memory_region(s, mem); |
595 |
if (err) {
|
596 |
fprintf(stderr, "%s: error registering suffix slot: %s\n",
|
597 |
__func__, strerror(-err)); |
598 |
abort(); |
599 |
} |
600 |
} |
601 |
} |
602 |
|
603 |
/* in case the KVM bug workaround already "consumed" the new slot */
|
604 |
if (!size) {
|
605 |
return;
|
606 |
} |
607 |
/* KVM does not need to know about this memory */
|
608 |
if (flags >= IO_MEM_UNASSIGNED) {
|
609 |
return;
|
610 |
} |
611 |
mem = kvm_alloc_slot(s); |
612 |
mem->memory_size = size; |
613 |
mem->start_addr = start_addr; |
614 |
mem->phys_offset = phys_offset; |
615 |
mem->flags = 0;
|
616 |
|
617 |
err = kvm_set_user_memory_region(s, mem); |
618 |
if (err) {
|
619 |
fprintf(stderr, "%s: error registering slot: %s\n", __func__,
|
620 |
strerror(-err)); |
621 |
abort(); |
622 |
} |
623 |
} |
624 |
|
625 |
static void kvm_client_set_memory(struct CPUPhysMemoryClient *client, |
626 |
target_phys_addr_t start_addr, |
627 |
ram_addr_t size, ram_addr_t phys_offset) |
628 |
{ |
629 |
kvm_set_phys_mem(start_addr, size, phys_offset); |
630 |
} |
631 |
|
632 |
static int kvm_client_sync_dirty_bitmap(struct CPUPhysMemoryClient *client, |
633 |
target_phys_addr_t start_addr, |
634 |
target_phys_addr_t end_addr) |
635 |
{ |
636 |
return kvm_physical_sync_dirty_bitmap(start_addr, end_addr);
|
637 |
} |
638 |
|
639 |
static int kvm_client_migration_log(struct CPUPhysMemoryClient *client, |
640 |
int enable)
|
641 |
{ |
642 |
return kvm_set_migration_log(enable);
|
643 |
} |
644 |
|
645 |
static CPUPhysMemoryClient kvm_cpu_phys_memory_client = {
|
646 |
.set_memory = kvm_client_set_memory, |
647 |
.sync_dirty_bitmap = kvm_client_sync_dirty_bitmap, |
648 |
.migration_log = kvm_client_migration_log, |
649 |
.log_start = kvm_log_start, |
650 |
.log_stop = kvm_log_stop, |
651 |
}; |
652 |
|
653 |
int kvm_init(void) |
654 |
{ |
655 |
static const char upgrade_note[] = |
656 |
"Please upgrade to at least kernel 2.6.29 or recent kvm-kmod\n"
|
657 |
"(see http://sourceforge.net/projects/kvm).\n";
|
658 |
KVMState *s; |
659 |
const KVMCapabilityInfo *missing_cap;
|
660 |
int ret;
|
661 |
int i;
|
662 |
|
663 |
s = qemu_mallocz(sizeof(KVMState));
|
664 |
|
665 |
#ifdef KVM_CAP_SET_GUEST_DEBUG
|
666 |
QTAILQ_INIT(&s->kvm_sw_breakpoints); |
667 |
#endif
|
668 |
for (i = 0; i < ARRAY_SIZE(s->slots); i++) { |
669 |
s->slots[i].slot = i; |
670 |
} |
671 |
s->vmfd = -1;
|
672 |
s->fd = qemu_open("/dev/kvm", O_RDWR);
|
673 |
if (s->fd == -1) { |
674 |
fprintf(stderr, "Could not access KVM kernel module: %m\n");
|
675 |
ret = -errno; |
676 |
goto err;
|
677 |
} |
678 |
|
679 |
ret = kvm_ioctl(s, KVM_GET_API_VERSION, 0);
|
680 |
if (ret < KVM_API_VERSION) {
|
681 |
if (ret > 0) { |
682 |
ret = -EINVAL; |
683 |
} |
684 |
fprintf(stderr, "kvm version too old\n");
|
685 |
goto err;
|
686 |
} |
687 |
|
688 |
if (ret > KVM_API_VERSION) {
|
689 |
ret = -EINVAL; |
690 |
fprintf(stderr, "kvm version not supported\n");
|
691 |
goto err;
|
692 |
} |
693 |
|
694 |
s->vmfd = kvm_ioctl(s, KVM_CREATE_VM, 0);
|
695 |
if (s->vmfd < 0) { |
696 |
#ifdef TARGET_S390X
|
697 |
fprintf(stderr, "Please add the 'switch_amode' kernel parameter to "
|
698 |
"your host kernel command line\n");
|
699 |
#endif
|
700 |
goto err;
|
701 |
} |
702 |
|
703 |
missing_cap = kvm_check_extension_list(s, kvm_required_capabilites); |
704 |
if (!missing_cap) {
|
705 |
missing_cap = |
706 |
kvm_check_extension_list(s, kvm_arch_required_capabilities); |
707 |
} |
708 |
if (missing_cap) {
|
709 |
ret = -EINVAL; |
710 |
fprintf(stderr, "kvm does not support %s\n%s",
|
711 |
missing_cap->name, upgrade_note); |
712 |
goto err;
|
713 |
} |
714 |
|
715 |
s->coalesced_mmio = kvm_check_extension(s, KVM_CAP_COALESCED_MMIO); |
716 |
|
717 |
s->broken_set_mem_region = 1;
|
718 |
#ifdef KVM_CAP_JOIN_MEMORY_REGIONS_WORKS
|
719 |
ret = kvm_check_extension(s, KVM_CAP_JOIN_MEMORY_REGIONS_WORKS); |
720 |
if (ret > 0) { |
721 |
s->broken_set_mem_region = 0;
|
722 |
} |
723 |
#endif
|
724 |
|
725 |
s->vcpu_events = 0;
|
726 |
#ifdef KVM_CAP_VCPU_EVENTS
|
727 |
s->vcpu_events = kvm_check_extension(s, KVM_CAP_VCPU_EVENTS); |
728 |
#endif
|
729 |
|
730 |
s->robust_singlestep = 0;
|
731 |
#ifdef KVM_CAP_X86_ROBUST_SINGLESTEP
|
732 |
s->robust_singlestep = |
733 |
kvm_check_extension(s, KVM_CAP_X86_ROBUST_SINGLESTEP); |
734 |
#endif
|
735 |
|
736 |
s->debugregs = 0;
|
737 |
#ifdef KVM_CAP_DEBUGREGS
|
738 |
s->debugregs = kvm_check_extension(s, KVM_CAP_DEBUGREGS); |
739 |
#endif
|
740 |
|
741 |
s->xsave = 0;
|
742 |
#ifdef KVM_CAP_XSAVE
|
743 |
s->xsave = kvm_check_extension(s, KVM_CAP_XSAVE); |
744 |
#endif
|
745 |
|
746 |
s->xcrs = 0;
|
747 |
#ifdef KVM_CAP_XCRS
|
748 |
s->xcrs = kvm_check_extension(s, KVM_CAP_XCRS); |
749 |
#endif
|
750 |
|
751 |
ret = kvm_arch_init(s); |
752 |
if (ret < 0) { |
753 |
goto err;
|
754 |
} |
755 |
|
756 |
kvm_state = s; |
757 |
cpu_register_phys_memory_client(&kvm_cpu_phys_memory_client); |
758 |
|
759 |
s->many_ioeventfds = kvm_check_many_ioeventfds(); |
760 |
|
761 |
return 0; |
762 |
|
763 |
err:
|
764 |
if (s) {
|
765 |
if (s->vmfd != -1) { |
766 |
close(s->vmfd); |
767 |
} |
768 |
if (s->fd != -1) { |
769 |
close(s->fd); |
770 |
} |
771 |
} |
772 |
qemu_free(s); |
773 |
|
774 |
return ret;
|
775 |
} |
776 |
|
777 |
static void kvm_handle_io(uint16_t port, void *data, int direction, int size, |
778 |
uint32_t count) |
779 |
{ |
780 |
int i;
|
781 |
uint8_t *ptr = data; |
782 |
|
783 |
for (i = 0; i < count; i++) { |
784 |
if (direction == KVM_EXIT_IO_IN) {
|
785 |
switch (size) {
|
786 |
case 1: |
787 |
stb_p(ptr, cpu_inb(port)); |
788 |
break;
|
789 |
case 2: |
790 |
stw_p(ptr, cpu_inw(port)); |
791 |
break;
|
792 |
case 4: |
793 |
stl_p(ptr, cpu_inl(port)); |
794 |
break;
|
795 |
} |
796 |
} else {
|
797 |
switch (size) {
|
798 |
case 1: |
799 |
cpu_outb(port, ldub_p(ptr)); |
800 |
break;
|
801 |
case 2: |
802 |
cpu_outw(port, lduw_p(ptr)); |
803 |
break;
|
804 |
case 4: |
805 |
cpu_outl(port, ldl_p(ptr)); |
806 |
break;
|
807 |
} |
808 |
} |
809 |
|
810 |
ptr += size; |
811 |
} |
812 |
} |
813 |
|
814 |
#ifdef KVM_CAP_INTERNAL_ERROR_DATA
|
815 |
static int kvm_handle_internal_error(CPUState *env, struct kvm_run *run) |
816 |
{ |
817 |
fprintf(stderr, "KVM internal error.");
|
818 |
if (kvm_check_extension(kvm_state, KVM_CAP_INTERNAL_ERROR_DATA)) {
|
819 |
int i;
|
820 |
|
821 |
fprintf(stderr, " Suberror: %d\n", run->internal.suberror);
|
822 |
for (i = 0; i < run->internal.ndata; ++i) { |
823 |
fprintf(stderr, "extra data[%d]: %"PRIx64"\n", |
824 |
i, (uint64_t)run->internal.data[i]); |
825 |
} |
826 |
} else {
|
827 |
fprintf(stderr, "\n");
|
828 |
} |
829 |
if (run->internal.suberror == KVM_INTERNAL_ERROR_EMULATION) {
|
830 |
fprintf(stderr, "emulation failure\n");
|
831 |
if (!kvm_arch_stop_on_emulation_error(env)) {
|
832 |
cpu_dump_state(env, stderr, fprintf, CPU_DUMP_CODE); |
833 |
return 0; |
834 |
} |
835 |
} |
836 |
/* FIXME: Should trigger a qmp message to let management know
|
837 |
* something went wrong.
|
838 |
*/
|
839 |
return -1; |
840 |
} |
841 |
#endif
|
842 |
|
843 |
void kvm_flush_coalesced_mmio_buffer(void) |
844 |
{ |
845 |
KVMState *s = kvm_state; |
846 |
if (s->coalesced_mmio_ring) {
|
847 |
struct kvm_coalesced_mmio_ring *ring = s->coalesced_mmio_ring;
|
848 |
while (ring->first != ring->last) {
|
849 |
struct kvm_coalesced_mmio *ent;
|
850 |
|
851 |
ent = &ring->coalesced_mmio[ring->first]; |
852 |
|
853 |
cpu_physical_memory_write(ent->phys_addr, ent->data, ent->len); |
854 |
smp_wmb(); |
855 |
ring->first = (ring->first + 1) % KVM_COALESCED_MMIO_MAX;
|
856 |
} |
857 |
} |
858 |
} |
859 |
|
860 |
static void do_kvm_cpu_synchronize_state(void *_env) |
861 |
{ |
862 |
CPUState *env = _env; |
863 |
|
864 |
if (!env->kvm_vcpu_dirty) {
|
865 |
kvm_arch_get_registers(env); |
866 |
env->kvm_vcpu_dirty = 1;
|
867 |
} |
868 |
} |
869 |
|
870 |
void kvm_cpu_synchronize_state(CPUState *env)
|
871 |
{ |
872 |
if (!env->kvm_vcpu_dirty) {
|
873 |
run_on_cpu(env, do_kvm_cpu_synchronize_state, env); |
874 |
} |
875 |
} |
876 |
|
877 |
void kvm_cpu_synchronize_post_reset(CPUState *env)
|
878 |
{ |
879 |
kvm_arch_put_registers(env, KVM_PUT_RESET_STATE); |
880 |
env->kvm_vcpu_dirty = 0;
|
881 |
} |
882 |
|
883 |
void kvm_cpu_synchronize_post_init(CPUState *env)
|
884 |
{ |
885 |
kvm_arch_put_registers(env, KVM_PUT_FULL_STATE); |
886 |
env->kvm_vcpu_dirty = 0;
|
887 |
} |
888 |
|
889 |
int kvm_cpu_exec(CPUState *env)
|
890 |
{ |
891 |
struct kvm_run *run = env->kvm_run;
|
892 |
int ret;
|
893 |
|
894 |
DPRINTF("kvm_cpu_exec()\n");
|
895 |
|
896 |
if (kvm_arch_process_async_events(env)) {
|
897 |
env->exit_request = 0;
|
898 |
return EXCP_HLT;
|
899 |
} |
900 |
|
901 |
cpu_single_env = env; |
902 |
|
903 |
do {
|
904 |
if (env->kvm_vcpu_dirty) {
|
905 |
kvm_arch_put_registers(env, KVM_PUT_RUNTIME_STATE); |
906 |
env->kvm_vcpu_dirty = 0;
|
907 |
} |
908 |
|
909 |
kvm_arch_pre_run(env, run); |
910 |
if (env->exit_request) {
|
911 |
DPRINTF("interrupt exit requested\n");
|
912 |
/*
|
913 |
* KVM requires us to reenter the kernel after IO exits to complete
|
914 |
* instruction emulation. This self-signal will ensure that we
|
915 |
* leave ASAP again.
|
916 |
*/
|
917 |
qemu_cpu_kick_self(); |
918 |
} |
919 |
cpu_single_env = NULL;
|
920 |
qemu_mutex_unlock_iothread(); |
921 |
|
922 |
ret = kvm_vcpu_ioctl(env, KVM_RUN, 0);
|
923 |
|
924 |
qemu_mutex_lock_iothread(); |
925 |
cpu_single_env = env; |
926 |
kvm_arch_post_run(env, run); |
927 |
|
928 |
kvm_flush_coalesced_mmio_buffer(); |
929 |
|
930 |
if (ret == -EINTR || ret == -EAGAIN) {
|
931 |
DPRINTF("io window exit\n");
|
932 |
ret = 0;
|
933 |
break;
|
934 |
} |
935 |
|
936 |
if (ret < 0) { |
937 |
DPRINTF("kvm run failed %s\n", strerror(-ret));
|
938 |
abort(); |
939 |
} |
940 |
|
941 |
ret = 0; /* exit loop */ |
942 |
switch (run->exit_reason) {
|
943 |
case KVM_EXIT_IO:
|
944 |
DPRINTF("handle_io\n");
|
945 |
kvm_handle_io(run->io.port, |
946 |
(uint8_t *)run + run->io.data_offset, |
947 |
run->io.direction, |
948 |
run->io.size, |
949 |
run->io.count); |
950 |
ret = 1;
|
951 |
break;
|
952 |
case KVM_EXIT_MMIO:
|
953 |
DPRINTF("handle_mmio\n");
|
954 |
cpu_physical_memory_rw(run->mmio.phys_addr, |
955 |
run->mmio.data, |
956 |
run->mmio.len, |
957 |
run->mmio.is_write); |
958 |
ret = 1;
|
959 |
break;
|
960 |
case KVM_EXIT_IRQ_WINDOW_OPEN:
|
961 |
DPRINTF("irq_window_open\n");
|
962 |
break;
|
963 |
case KVM_EXIT_SHUTDOWN:
|
964 |
DPRINTF("shutdown\n");
|
965 |
qemu_system_reset_request(); |
966 |
break;
|
967 |
case KVM_EXIT_UNKNOWN:
|
968 |
fprintf(stderr, "KVM: unknown exit, hardware reason %" PRIx64 "\n", |
969 |
(uint64_t)run->hw.hardware_exit_reason); |
970 |
ret = -1;
|
971 |
break;
|
972 |
#ifdef KVM_CAP_INTERNAL_ERROR_DATA
|
973 |
case KVM_EXIT_INTERNAL_ERROR:
|
974 |
ret = kvm_handle_internal_error(env, run); |
975 |
break;
|
976 |
#endif
|
977 |
case KVM_EXIT_DEBUG:
|
978 |
DPRINTF("kvm_exit_debug\n");
|
979 |
#ifdef KVM_CAP_SET_GUEST_DEBUG
|
980 |
if (kvm_arch_debug(&run->debug.arch)) {
|
981 |
ret = EXCP_DEBUG; |
982 |
goto out;
|
983 |
} |
984 |
/* re-enter, this exception was guest-internal */
|
985 |
ret = 1;
|
986 |
#endif /* KVM_CAP_SET_GUEST_DEBUG */ |
987 |
break;
|
988 |
default:
|
989 |
DPRINTF("kvm_arch_handle_exit\n");
|
990 |
ret = kvm_arch_handle_exit(env, run); |
991 |
break;
|
992 |
} |
993 |
} while (ret > 0); |
994 |
|
995 |
if (ret < 0) { |
996 |
cpu_dump_state(env, stderr, fprintf, CPU_DUMP_CODE); |
997 |
vm_stop(VMSTOP_PANIC); |
998 |
} |
999 |
ret = EXCP_INTERRUPT; |
1000 |
|
1001 |
#ifdef KVM_CAP_SET_GUEST_DEBUG
|
1002 |
out:
|
1003 |
#endif
|
1004 |
env->exit_request = 0;
|
1005 |
cpu_single_env = NULL;
|
1006 |
return ret;
|
1007 |
} |
1008 |
|
1009 |
int kvm_ioctl(KVMState *s, int type, ...) |
1010 |
{ |
1011 |
int ret;
|
1012 |
void *arg;
|
1013 |
va_list ap; |
1014 |
|
1015 |
va_start(ap, type); |
1016 |
arg = va_arg(ap, void *);
|
1017 |
va_end(ap); |
1018 |
|
1019 |
ret = ioctl(s->fd, type, arg); |
1020 |
if (ret == -1) { |
1021 |
ret = -errno; |
1022 |
} |
1023 |
return ret;
|
1024 |
} |
1025 |
|
1026 |
int kvm_vm_ioctl(KVMState *s, int type, ...) |
1027 |
{ |
1028 |
int ret;
|
1029 |
void *arg;
|
1030 |
va_list ap; |
1031 |
|
1032 |
va_start(ap, type); |
1033 |
arg = va_arg(ap, void *);
|
1034 |
va_end(ap); |
1035 |
|
1036 |
ret = ioctl(s->vmfd, type, arg); |
1037 |
if (ret == -1) { |
1038 |
ret = -errno; |
1039 |
} |
1040 |
return ret;
|
1041 |
} |
1042 |
|
1043 |
int kvm_vcpu_ioctl(CPUState *env, int type, ...) |
1044 |
{ |
1045 |
int ret;
|
1046 |
void *arg;
|
1047 |
va_list ap; |
1048 |
|
1049 |
va_start(ap, type); |
1050 |
arg = va_arg(ap, void *);
|
1051 |
va_end(ap); |
1052 |
|
1053 |
ret = ioctl(env->kvm_fd, type, arg); |
1054 |
if (ret == -1) { |
1055 |
ret = -errno; |
1056 |
} |
1057 |
return ret;
|
1058 |
} |
1059 |
|
1060 |
int kvm_has_sync_mmu(void) |
1061 |
{ |
1062 |
return kvm_check_extension(kvm_state, KVM_CAP_SYNC_MMU);
|
1063 |
} |
1064 |
|
1065 |
int kvm_has_vcpu_events(void) |
1066 |
{ |
1067 |
return kvm_state->vcpu_events;
|
1068 |
} |
1069 |
|
1070 |
int kvm_has_robust_singlestep(void) |
1071 |
{ |
1072 |
return kvm_state->robust_singlestep;
|
1073 |
} |
1074 |
|
1075 |
int kvm_has_debugregs(void) |
1076 |
{ |
1077 |
return kvm_state->debugregs;
|
1078 |
} |
1079 |
|
1080 |
int kvm_has_xsave(void) |
1081 |
{ |
1082 |
return kvm_state->xsave;
|
1083 |
} |
1084 |
|
1085 |
int kvm_has_xcrs(void) |
1086 |
{ |
1087 |
return kvm_state->xcrs;
|
1088 |
} |
1089 |
|
1090 |
int kvm_has_many_ioeventfds(void) |
1091 |
{ |
1092 |
if (!kvm_enabled()) {
|
1093 |
return 0; |
1094 |
} |
1095 |
return kvm_state->many_ioeventfds;
|
1096 |
} |
1097 |
|
1098 |
void kvm_setup_guest_memory(void *start, size_t size) |
1099 |
{ |
1100 |
if (!kvm_has_sync_mmu()) {
|
1101 |
int ret = qemu_madvise(start, size, QEMU_MADV_DONTFORK);
|
1102 |
|
1103 |
if (ret) {
|
1104 |
perror("qemu_madvise");
|
1105 |
fprintf(stderr, |
1106 |
"Need MADV_DONTFORK in absence of synchronous KVM MMU\n");
|
1107 |
exit(1);
|
1108 |
} |
1109 |
} |
1110 |
} |
1111 |
|
1112 |
#ifdef KVM_CAP_SET_GUEST_DEBUG
|
1113 |
struct kvm_sw_breakpoint *kvm_find_sw_breakpoint(CPUState *env,
|
1114 |
target_ulong pc) |
1115 |
{ |
1116 |
struct kvm_sw_breakpoint *bp;
|
1117 |
|
1118 |
QTAILQ_FOREACH(bp, &env->kvm_state->kvm_sw_breakpoints, entry) { |
1119 |
if (bp->pc == pc) {
|
1120 |
return bp;
|
1121 |
} |
1122 |
} |
1123 |
return NULL; |
1124 |
} |
1125 |
|
1126 |
int kvm_sw_breakpoints_active(CPUState *env)
|
1127 |
{ |
1128 |
return !QTAILQ_EMPTY(&env->kvm_state->kvm_sw_breakpoints);
|
1129 |
} |
1130 |
|
1131 |
struct kvm_set_guest_debug_data {
|
1132 |
struct kvm_guest_debug dbg;
|
1133 |
CPUState *env; |
1134 |
int err;
|
1135 |
}; |
1136 |
|
1137 |
static void kvm_invoke_set_guest_debug(void *data) |
1138 |
{ |
1139 |
struct kvm_set_guest_debug_data *dbg_data = data;
|
1140 |
CPUState *env = dbg_data->env; |
1141 |
|
1142 |
dbg_data->err = kvm_vcpu_ioctl(env, KVM_SET_GUEST_DEBUG, &dbg_data->dbg); |
1143 |
} |
1144 |
|
1145 |
int kvm_update_guest_debug(CPUState *env, unsigned long reinject_trap) |
1146 |
{ |
1147 |
struct kvm_set_guest_debug_data data;
|
1148 |
|
1149 |
data.dbg.control = reinject_trap; |
1150 |
|
1151 |
if (env->singlestep_enabled) {
|
1152 |
data.dbg.control |= KVM_GUESTDBG_ENABLE | KVM_GUESTDBG_SINGLESTEP; |
1153 |
} |
1154 |
kvm_arch_update_guest_debug(env, &data.dbg); |
1155 |
data.env = env; |
1156 |
|
1157 |
run_on_cpu(env, kvm_invoke_set_guest_debug, &data); |
1158 |
return data.err;
|
1159 |
} |
1160 |
|
1161 |
int kvm_insert_breakpoint(CPUState *current_env, target_ulong addr,
|
1162 |
target_ulong len, int type)
|
1163 |
{ |
1164 |
struct kvm_sw_breakpoint *bp;
|
1165 |
CPUState *env; |
1166 |
int err;
|
1167 |
|
1168 |
if (type == GDB_BREAKPOINT_SW) {
|
1169 |
bp = kvm_find_sw_breakpoint(current_env, addr); |
1170 |
if (bp) {
|
1171 |
bp->use_count++; |
1172 |
return 0; |
1173 |
} |
1174 |
|
1175 |
bp = qemu_malloc(sizeof(struct kvm_sw_breakpoint)); |
1176 |
if (!bp) {
|
1177 |
return -ENOMEM;
|
1178 |
} |
1179 |
|
1180 |
bp->pc = addr; |
1181 |
bp->use_count = 1;
|
1182 |
err = kvm_arch_insert_sw_breakpoint(current_env, bp); |
1183 |
if (err) {
|
1184 |
free(bp); |
1185 |
return err;
|
1186 |
} |
1187 |
|
1188 |
QTAILQ_INSERT_HEAD(¤t_env->kvm_state->kvm_sw_breakpoints, |
1189 |
bp, entry); |
1190 |
} else {
|
1191 |
err = kvm_arch_insert_hw_breakpoint(addr, len, type); |
1192 |
if (err) {
|
1193 |
return err;
|
1194 |
} |
1195 |
} |
1196 |
|
1197 |
for (env = first_cpu; env != NULL; env = env->next_cpu) { |
1198 |
err = kvm_update_guest_debug(env, 0);
|
1199 |
if (err) {
|
1200 |
return err;
|
1201 |
} |
1202 |
} |
1203 |
return 0; |
1204 |
} |
1205 |
|
1206 |
int kvm_remove_breakpoint(CPUState *current_env, target_ulong addr,
|
1207 |
target_ulong len, int type)
|
1208 |
{ |
1209 |
struct kvm_sw_breakpoint *bp;
|
1210 |
CPUState *env; |
1211 |
int err;
|
1212 |
|
1213 |
if (type == GDB_BREAKPOINT_SW) {
|
1214 |
bp = kvm_find_sw_breakpoint(current_env, addr); |
1215 |
if (!bp) {
|
1216 |
return -ENOENT;
|
1217 |
} |
1218 |
|
1219 |
if (bp->use_count > 1) { |
1220 |
bp->use_count--; |
1221 |
return 0; |
1222 |
} |
1223 |
|
1224 |
err = kvm_arch_remove_sw_breakpoint(current_env, bp); |
1225 |
if (err) {
|
1226 |
return err;
|
1227 |
} |
1228 |
|
1229 |
QTAILQ_REMOVE(¤t_env->kvm_state->kvm_sw_breakpoints, bp, entry); |
1230 |
qemu_free(bp); |
1231 |
} else {
|
1232 |
err = kvm_arch_remove_hw_breakpoint(addr, len, type); |
1233 |
if (err) {
|
1234 |
return err;
|
1235 |
} |
1236 |
} |
1237 |
|
1238 |
for (env = first_cpu; env != NULL; env = env->next_cpu) { |
1239 |
err = kvm_update_guest_debug(env, 0);
|
1240 |
if (err) {
|
1241 |
return err;
|
1242 |
} |
1243 |
} |
1244 |
return 0; |
1245 |
} |
1246 |
|
1247 |
void kvm_remove_all_breakpoints(CPUState *current_env)
|
1248 |
{ |
1249 |
struct kvm_sw_breakpoint *bp, *next;
|
1250 |
KVMState *s = current_env->kvm_state; |
1251 |
CPUState *env; |
1252 |
|
1253 |
QTAILQ_FOREACH_SAFE(bp, &s->kvm_sw_breakpoints, entry, next) { |
1254 |
if (kvm_arch_remove_sw_breakpoint(current_env, bp) != 0) { |
1255 |
/* Try harder to find a CPU that currently sees the breakpoint. */
|
1256 |
for (env = first_cpu; env != NULL; env = env->next_cpu) { |
1257 |
if (kvm_arch_remove_sw_breakpoint(env, bp) == 0) { |
1258 |
break;
|
1259 |
} |
1260 |
} |
1261 |
} |
1262 |
} |
1263 |
kvm_arch_remove_all_hw_breakpoints(); |
1264 |
|
1265 |
for (env = first_cpu; env != NULL; env = env->next_cpu) { |
1266 |
kvm_update_guest_debug(env, 0);
|
1267 |
} |
1268 |
} |
1269 |
|
1270 |
#else /* !KVM_CAP_SET_GUEST_DEBUG */ |
1271 |
|
1272 |
int kvm_update_guest_debug(CPUState *env, unsigned long reinject_trap) |
1273 |
{ |
1274 |
return -EINVAL;
|
1275 |
} |
1276 |
|
1277 |
int kvm_insert_breakpoint(CPUState *current_env, target_ulong addr,
|
1278 |
target_ulong len, int type)
|
1279 |
{ |
1280 |
return -EINVAL;
|
1281 |
} |
1282 |
|
1283 |
int kvm_remove_breakpoint(CPUState *current_env, target_ulong addr,
|
1284 |
target_ulong len, int type)
|
1285 |
{ |
1286 |
return -EINVAL;
|
1287 |
} |
1288 |
|
1289 |
void kvm_remove_all_breakpoints(CPUState *current_env)
|
1290 |
{ |
1291 |
} |
1292 |
#endif /* !KVM_CAP_SET_GUEST_DEBUG */ |
1293 |
|
1294 |
int kvm_set_signal_mask(CPUState *env, const sigset_t *sigset) |
1295 |
{ |
1296 |
struct kvm_signal_mask *sigmask;
|
1297 |
int r;
|
1298 |
|
1299 |
if (!sigset) {
|
1300 |
return kvm_vcpu_ioctl(env, KVM_SET_SIGNAL_MASK, NULL); |
1301 |
} |
1302 |
|
1303 |
sigmask = qemu_malloc(sizeof(*sigmask) + sizeof(*sigset)); |
1304 |
|
1305 |
sigmask->len = 8;
|
1306 |
memcpy(sigmask->sigset, sigset, sizeof(*sigset));
|
1307 |
r = kvm_vcpu_ioctl(env, KVM_SET_SIGNAL_MASK, sigmask); |
1308 |
free(sigmask); |
1309 |
|
1310 |
return r;
|
1311 |
} |
1312 |
|
1313 |
int kvm_set_ioeventfd_mmio_long(int fd, uint32_t addr, uint32_t val, bool assign) |
1314 |
{ |
1315 |
#ifdef KVM_IOEVENTFD
|
1316 |
int ret;
|
1317 |
struct kvm_ioeventfd iofd;
|
1318 |
|
1319 |
iofd.datamatch = val; |
1320 |
iofd.addr = addr; |
1321 |
iofd.len = 4;
|
1322 |
iofd.flags = KVM_IOEVENTFD_FLAG_DATAMATCH; |
1323 |
iofd.fd = fd; |
1324 |
|
1325 |
if (!kvm_enabled()) {
|
1326 |
return -ENOSYS;
|
1327 |
} |
1328 |
|
1329 |
if (!assign) {
|
1330 |
iofd.flags |= KVM_IOEVENTFD_FLAG_DEASSIGN; |
1331 |
} |
1332 |
|
1333 |
ret = kvm_vm_ioctl(kvm_state, KVM_IOEVENTFD, &iofd); |
1334 |
|
1335 |
if (ret < 0) { |
1336 |
return -errno;
|
1337 |
} |
1338 |
|
1339 |
return 0; |
1340 |
#else
|
1341 |
return -ENOSYS;
|
1342 |
#endif
|
1343 |
} |
1344 |
|
1345 |
int kvm_set_ioeventfd_pio_word(int fd, uint16_t addr, uint16_t val, bool assign) |
1346 |
{ |
1347 |
#ifdef KVM_IOEVENTFD
|
1348 |
struct kvm_ioeventfd kick = {
|
1349 |
.datamatch = val, |
1350 |
.addr = addr, |
1351 |
.len = 2,
|
1352 |
.flags = KVM_IOEVENTFD_FLAG_DATAMATCH | KVM_IOEVENTFD_FLAG_PIO, |
1353 |
.fd = fd, |
1354 |
}; |
1355 |
int r;
|
1356 |
if (!kvm_enabled()) {
|
1357 |
return -ENOSYS;
|
1358 |
} |
1359 |
if (!assign) {
|
1360 |
kick.flags |= KVM_IOEVENTFD_FLAG_DEASSIGN; |
1361 |
} |
1362 |
r = kvm_vm_ioctl(kvm_state, KVM_IOEVENTFD, &kick); |
1363 |
if (r < 0) { |
1364 |
return r;
|
1365 |
} |
1366 |
return 0; |
1367 |
#else
|
1368 |
return -ENOSYS;
|
1369 |
#endif
|
1370 |
} |
1371 |
|
1372 |
int kvm_on_sigbus_vcpu(CPUState *env, int code, void *addr) |
1373 |
{ |
1374 |
return kvm_arch_on_sigbus_vcpu(env, code, addr);
|
1375 |
} |
1376 |
|
1377 |
int kvm_on_sigbus(int code, void *addr) |
1378 |
{ |
1379 |
return kvm_arch_on_sigbus(code, addr);
|
1380 |
} |