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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/atomic.h" |
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#include "qemu/option.h" |
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#include "qemu/config-file.h" |
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#include "sysemu/sysemu.h" |
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#include "hw/hw.h" |
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#include "hw/pci/msi.h" |
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#include "exec/gdbstub.h" |
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#include "sysemu/kvm.h" |
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#include "qemu/bswap.h" |
| 33 |
#include "exec/memory.h" |
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#include "exec/ram_addr.h" |
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#include "exec/address-spaces.h" |
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#include "qemu/event_notifier.h" |
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#include "trace.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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#ifdef CONFIG_VALGRIND_H
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#include <valgrind/memcheck.h> |
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#endif
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|
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/* KVM uses PAGE_SIZE in its 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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#define KVM_MSI_HASHTAB_SIZE 256 |
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|
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typedef struct KVMSlot |
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{
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hwaddr start_addr; |
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ram_addr_t memory_size; |
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void *ram;
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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; |
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int nr_slots;
|
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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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bool coalesced_flush_in_progress;
|
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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 pit_state2;
|
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int xsave, xcrs;
|
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int many_ioeventfds;
|
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int intx_set_mask;
|
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/* The man page (and posix) say ioctl numbers are signed int, but
|
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* they're not. Linux, glibc and *BSD all treat ioctl numbers as
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* unsigned, and treating them as signed here can break things */
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unsigned irq_set_ioctl;
|
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#ifdef KVM_CAP_IRQ_ROUTING
|
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struct kvm_irq_routing *irq_routes;
|
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int nr_allocated_irq_routes;
|
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uint32_t *used_gsi_bitmap; |
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unsigned int gsi_count; |
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QTAILQ_HEAD(msi_hashtab, KVMMSIRoute) msi_hashtab[KVM_MSI_HASHTAB_SIZE]; |
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bool direct_msi;
|
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#endif
|
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}; |
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|
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KVMState *kvm_state; |
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bool kvm_kernel_irqchip;
|
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bool kvm_async_interrupts_allowed;
|
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bool kvm_halt_in_kernel_allowed;
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bool kvm_irqfds_allowed;
|
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bool kvm_msi_via_irqfd_allowed;
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bool kvm_gsi_routing_allowed;
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bool kvm_gsi_direct_mapping;
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bool kvm_allowed;
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bool kvm_readonly_mem_allowed;
|
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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 < s->nr_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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hwaddr start_addr, |
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hwaddr end_addr) |
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{
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int i;
|
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|
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for (i = 0; i < s->nr_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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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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hwaddr start_addr, |
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hwaddr 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 < s->nr_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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} |
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|
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return found;
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} |
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|
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int kvm_physical_memory_addr_from_host(KVMState *s, void *ram, |
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hwaddr *phys_addr) |
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{
|
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int i;
|
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|
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for (i = 0; i < s->nr_slots; i++) { |
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KVMSlot *mem = &s->slots[i]; |
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|
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if (ram >= mem->ram && ram < mem->ram + mem->memory_size) {
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*phys_addr = mem->start_addr + (ram - mem->ram); |
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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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|
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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.userspace_addr = (unsigned long)slot->ram; |
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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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|
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if (slot->memory_size && mem.flags & KVM_MEM_READONLY) {
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/* Set the slot size to 0 before setting the slot to the desired
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* value. This is needed based on KVM commit 75d61fbc. */
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mem.memory_size = 0;
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kvm_vm_ioctl(s, KVM_SET_USER_MEMORY_REGION, &mem); |
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} |
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mem.memory_size = slot->memory_size; |
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return kvm_vm_ioctl(s, KVM_SET_USER_MEMORY_REGION, &mem);
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} |
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|
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static void kvm_reset_vcpu(void *opaque) |
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{
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CPUState *cpu = opaque; |
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|
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kvm_arch_reset_vcpu(cpu); |
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} |
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|
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int kvm_init_vcpu(CPUState *cpu)
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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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|
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DPRINTF("kvm_init_vcpu\n");
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|
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ret = kvm_vm_ioctl(s, KVM_CREATE_VCPU, (void *)kvm_arch_vcpu_id(cpu));
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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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|
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cpu->kvm_fd = ret; |
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cpu->kvm_state = s; |
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cpu->kvm_vcpu_dirty = true;
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|
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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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|
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cpu->kvm_run = mmap(NULL, mmap_size, PROT_READ | PROT_WRITE, MAP_SHARED,
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cpu->kvm_fd, 0);
|
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if (cpu->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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|
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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 *)cpu->kvm_run + s->coalesced_mmio * PAGE_SIZE;
|
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} |
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|
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ret = kvm_arch_init_vcpu(cpu); |
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if (ret == 0) { |
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qemu_register_reset(kvm_reset_vcpu, cpu); |
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kvm_arch_reset_vcpu(cpu); |
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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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/*
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* dirty pages logging control
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*/
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|
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static int kvm_mem_flags(KVMState *s, bool log_dirty, bool readonly) |
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{
|
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int flags = 0; |
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flags = log_dirty ? KVM_MEM_LOG_DIRTY_PAGES : 0;
|
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if (readonly && kvm_readonly_mem_allowed) {
|
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flags |= KVM_MEM_READONLY; |
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} |
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return flags;
|
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} |
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|
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static int kvm_slot_dirty_pages_log_change(KVMSlot *mem, bool log_dirty) |
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{
|
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KVMState *s = kvm_state; |
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int flags, mask = KVM_MEM_LOG_DIRTY_PAGES;
|
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int old_flags;
|
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|
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old_flags = mem->flags; |
| 299 |
|
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flags = (mem->flags & ~mask) | kvm_mem_flags(s, log_dirty, false);
|
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mem->flags = flags; |
| 302 |
|
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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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} |
| 307 |
|
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if (flags == old_flags) {
|
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return 0; |
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} |
| 311 |
|
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return kvm_set_user_memory_region(s, mem);
|
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} |
| 314 |
|
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static int kvm_dirty_pages_log_change(hwaddr phys_addr, |
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ram_addr_t size, bool log_dirty)
|
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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); |
| 320 |
|
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if (mem == NULL) { |
| 322 |
fprintf(stderr, "BUG: %s: invalid parameters " TARGET_FMT_plx "-" |
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TARGET_FMT_plx "\n", __func__, phys_addr,
|
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(hwaddr)(phys_addr + size - 1));
|
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return -EINVAL;
|
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} |
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return kvm_slot_dirty_pages_log_change(mem, log_dirty);
|
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} |
| 329 |
|
| 330 |
static void kvm_log_start(MemoryListener *listener, |
| 331 |
MemoryRegionSection *section) |
| 332 |
{
|
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int r;
|
| 334 |
|
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r = kvm_dirty_pages_log_change(section->offset_within_address_space, |
| 336 |
int128_get64(section->size), true);
|
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if (r < 0) { |
| 338 |
abort(); |
| 339 |
} |
| 340 |
} |
| 341 |
|
| 342 |
static void kvm_log_stop(MemoryListener *listener, |
| 343 |
MemoryRegionSection *section) |
| 344 |
{
|
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int r;
|
| 346 |
|
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r = kvm_dirty_pages_log_change(section->offset_within_address_space, |
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int128_get64(section->size), false);
|
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if (r < 0) { |
| 350 |
abort(); |
| 351 |
} |
| 352 |
} |
| 353 |
|
| 354 |
static int kvm_set_migration_log(int enable) |
| 355 |
{
|
| 356 |
KVMState *s = kvm_state; |
| 357 |
KVMSlot *mem; |
| 358 |
int i, err;
|
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|
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s->migration_log = enable; |
| 361 |
|
| 362 |
for (i = 0; i < s->nr_slots; i++) { |
| 363 |
mem = &s->slots[i]; |
| 364 |
|
| 365 |
if (!mem->memory_size) {
|
| 366 |
continue;
|
| 367 |
} |
| 368 |
if (!!(mem->flags & KVM_MEM_LOG_DIRTY_PAGES) == enable) {
|
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continue;
|
| 370 |
} |
| 371 |
err = kvm_set_user_memory_region(s, mem); |
| 372 |
if (err) {
|
| 373 |
return err;
|
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} |
| 375 |
} |
| 376 |
return 0; |
| 377 |
} |
| 378 |
|
| 379 |
/* get kvm's dirty pages bitmap and update qemu's */
|
| 380 |
static int kvm_get_dirty_pages_log_range(MemoryRegionSection *section, |
| 381 |
unsigned long *bitmap) |
| 382 |
{
|
| 383 |
ram_addr_t start = section->offset_within_region + section->mr->ram_addr; |
| 384 |
ram_addr_t pages = int128_get64(section->size) / getpagesize(); |
| 385 |
|
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cpu_physical_memory_set_dirty_lebitmap(bitmap, start, pages); |
| 387 |
return 0; |
| 388 |
} |
| 389 |
|
| 390 |
#define ALIGN(x, y) (((x)+(y)-1) & ~((y)-1)) |
| 391 |
|
| 392 |
/**
|
| 393 |
* kvm_physical_sync_dirty_bitmap - Grab dirty bitmap from kernel space
|
| 394 |
* This function updates qemu's dirty bitmap using
|
| 395 |
* memory_region_set_dirty(). This means all bits are set
|
| 396 |
* to dirty.
|
| 397 |
*
|
| 398 |
* @start_add: start of logged region.
|
| 399 |
* @end_addr: end of logged region.
|
| 400 |
*/
|
| 401 |
static int kvm_physical_sync_dirty_bitmap(MemoryRegionSection *section) |
| 402 |
{
|
| 403 |
KVMState *s = kvm_state; |
| 404 |
unsigned long size, allocated_size = 0; |
| 405 |
KVMDirtyLog d; |
| 406 |
KVMSlot *mem; |
| 407 |
int ret = 0; |
| 408 |
hwaddr start_addr = section->offset_within_address_space; |
| 409 |
hwaddr end_addr = start_addr + int128_get64(section->size); |
| 410 |
|
| 411 |
d.dirty_bitmap = NULL;
|
| 412 |
while (start_addr < end_addr) {
|
| 413 |
mem = kvm_lookup_overlapping_slot(s, start_addr, end_addr); |
| 414 |
if (mem == NULL) { |
| 415 |
break;
|
| 416 |
} |
| 417 |
|
| 418 |
/* XXX bad kernel interface alert
|
| 419 |
* For dirty bitmap, kernel allocates array of size aligned to
|
| 420 |
* bits-per-long. But for case when the kernel is 64bits and
|
| 421 |
* the userspace is 32bits, userspace can't align to the same
|
| 422 |
* bits-per-long, since sizeof(long) is different between kernel
|
| 423 |
* and user space. This way, userspace will provide buffer which
|
| 424 |
* may be 4 bytes less than the kernel will use, resulting in
|
| 425 |
* userspace memory corruption (which is not detectable by valgrind
|
| 426 |
* too, in most cases).
|
| 427 |
* So for now, let's align to 64 instead of HOST_LONG_BITS here, in
|
| 428 |
* a hope that sizeof(long) wont become >8 any time soon.
|
| 429 |
*/
|
| 430 |
size = ALIGN(((mem->memory_size) >> TARGET_PAGE_BITS), |
| 431 |
/*HOST_LONG_BITS*/ 64) / 8; |
| 432 |
if (!d.dirty_bitmap) {
|
| 433 |
d.dirty_bitmap = g_malloc(size); |
| 434 |
} else if (size > allocated_size) { |
| 435 |
d.dirty_bitmap = g_realloc(d.dirty_bitmap, size); |
| 436 |
} |
| 437 |
allocated_size = size; |
| 438 |
memset(d.dirty_bitmap, 0, allocated_size);
|
| 439 |
|
| 440 |
d.slot = mem->slot; |
| 441 |
|
| 442 |
if (kvm_vm_ioctl(s, KVM_GET_DIRTY_LOG, &d) == -1) { |
| 443 |
DPRINTF("ioctl failed %d\n", errno);
|
| 444 |
ret = -1;
|
| 445 |
break;
|
| 446 |
} |
| 447 |
|
| 448 |
kvm_get_dirty_pages_log_range(section, d.dirty_bitmap); |
| 449 |
start_addr = mem->start_addr + mem->memory_size; |
| 450 |
} |
| 451 |
g_free(d.dirty_bitmap); |
| 452 |
|
| 453 |
return ret;
|
| 454 |
} |
| 455 |
|
| 456 |
static void kvm_coalesce_mmio_region(MemoryListener *listener, |
| 457 |
MemoryRegionSection *secion, |
| 458 |
hwaddr start, hwaddr size) |
| 459 |
{
|
| 460 |
KVMState *s = kvm_state; |
| 461 |
|
| 462 |
if (s->coalesced_mmio) {
|
| 463 |
struct kvm_coalesced_mmio_zone zone;
|
| 464 |
|
| 465 |
zone.addr = start; |
| 466 |
zone.size = size; |
| 467 |
zone.pad = 0;
|
| 468 |
|
| 469 |
(void)kvm_vm_ioctl(s, KVM_REGISTER_COALESCED_MMIO, &zone);
|
| 470 |
} |
| 471 |
} |
| 472 |
|
| 473 |
static void kvm_uncoalesce_mmio_region(MemoryListener *listener, |
| 474 |
MemoryRegionSection *secion, |
| 475 |
hwaddr start, hwaddr size) |
| 476 |
{
|
| 477 |
KVMState *s = kvm_state; |
| 478 |
|
| 479 |
if (s->coalesced_mmio) {
|
| 480 |
struct kvm_coalesced_mmio_zone zone;
|
| 481 |
|
| 482 |
zone.addr = start; |
| 483 |
zone.size = size; |
| 484 |
zone.pad = 0;
|
| 485 |
|
| 486 |
(void)kvm_vm_ioctl(s, KVM_UNREGISTER_COALESCED_MMIO, &zone);
|
| 487 |
} |
| 488 |
} |
| 489 |
|
| 490 |
int kvm_check_extension(KVMState *s, unsigned int extension) |
| 491 |
{
|
| 492 |
int ret;
|
| 493 |
|
| 494 |
ret = kvm_ioctl(s, KVM_CHECK_EXTENSION, extension); |
| 495 |
if (ret < 0) { |
| 496 |
ret = 0;
|
| 497 |
} |
| 498 |
|
| 499 |
return ret;
|
| 500 |
} |
| 501 |
|
| 502 |
static int kvm_set_ioeventfd_mmio(int fd, hwaddr addr, uint32_t val, |
| 503 |
bool assign, uint32_t size, bool datamatch) |
| 504 |
{
|
| 505 |
int ret;
|
| 506 |
struct kvm_ioeventfd iofd;
|
| 507 |
|
| 508 |
iofd.datamatch = datamatch ? val : 0;
|
| 509 |
iofd.addr = addr; |
| 510 |
iofd.len = size; |
| 511 |
iofd.flags = 0;
|
| 512 |
iofd.fd = fd; |
| 513 |
|
| 514 |
if (!kvm_enabled()) {
|
| 515 |
return -ENOSYS;
|
| 516 |
} |
| 517 |
|
| 518 |
if (datamatch) {
|
| 519 |
iofd.flags |= KVM_IOEVENTFD_FLAG_DATAMATCH; |
| 520 |
} |
| 521 |
if (!assign) {
|
| 522 |
iofd.flags |= KVM_IOEVENTFD_FLAG_DEASSIGN; |
| 523 |
} |
| 524 |
|
| 525 |
ret = kvm_vm_ioctl(kvm_state, KVM_IOEVENTFD, &iofd); |
| 526 |
|
| 527 |
if (ret < 0) { |
| 528 |
return -errno;
|
| 529 |
} |
| 530 |
|
| 531 |
return 0; |
| 532 |
} |
| 533 |
|
| 534 |
static int kvm_set_ioeventfd_pio(int fd, uint16_t addr, uint16_t val, |
| 535 |
bool assign, uint32_t size, bool datamatch) |
| 536 |
{
|
| 537 |
struct kvm_ioeventfd kick = {
|
| 538 |
.datamatch = datamatch ? val : 0,
|
| 539 |
.addr = addr, |
| 540 |
.flags = KVM_IOEVENTFD_FLAG_PIO, |
| 541 |
.len = size, |
| 542 |
.fd = fd, |
| 543 |
}; |
| 544 |
int r;
|
| 545 |
if (!kvm_enabled()) {
|
| 546 |
return -ENOSYS;
|
| 547 |
} |
| 548 |
if (datamatch) {
|
| 549 |
kick.flags |= KVM_IOEVENTFD_FLAG_DATAMATCH; |
| 550 |
} |
| 551 |
if (!assign) {
|
| 552 |
kick.flags |= KVM_IOEVENTFD_FLAG_DEASSIGN; |
| 553 |
} |
| 554 |
r = kvm_vm_ioctl(kvm_state, KVM_IOEVENTFD, &kick); |
| 555 |
if (r < 0) { |
| 556 |
return r;
|
| 557 |
} |
| 558 |
return 0; |
| 559 |
} |
| 560 |
|
| 561 |
|
| 562 |
static int kvm_check_many_ioeventfds(void) |
| 563 |
{
|
| 564 |
/* Userspace can use ioeventfd for io notification. This requires a host
|
| 565 |
* that supports eventfd(2) and an I/O thread; since eventfd does not
|
| 566 |
* support SIGIO it cannot interrupt the vcpu.
|
| 567 |
*
|
| 568 |
* Older kernels have a 6 device limit on the KVM io bus. Find out so we
|
| 569 |
* can avoid creating too many ioeventfds.
|
| 570 |
*/
|
| 571 |
#if defined(CONFIG_EVENTFD)
|
| 572 |
int ioeventfds[7]; |
| 573 |
int i, ret = 0; |
| 574 |
for (i = 0; i < ARRAY_SIZE(ioeventfds); i++) { |
| 575 |
ioeventfds[i] = eventfd(0, EFD_CLOEXEC);
|
| 576 |
if (ioeventfds[i] < 0) { |
| 577 |
break;
|
| 578 |
} |
| 579 |
ret = kvm_set_ioeventfd_pio(ioeventfds[i], 0, i, true, 2, true); |
| 580 |
if (ret < 0) { |
| 581 |
close(ioeventfds[i]); |
| 582 |
break;
|
| 583 |
} |
| 584 |
} |
| 585 |
|
| 586 |
/* Decide whether many devices are supported or not */
|
| 587 |
ret = i == ARRAY_SIZE(ioeventfds); |
| 588 |
|
| 589 |
while (i-- > 0) { |
| 590 |
kvm_set_ioeventfd_pio(ioeventfds[i], 0, i, false, 2, true); |
| 591 |
close(ioeventfds[i]); |
| 592 |
} |
| 593 |
return ret;
|
| 594 |
#else
|
| 595 |
return 0; |
| 596 |
#endif
|
| 597 |
} |
| 598 |
|
| 599 |
static const KVMCapabilityInfo * |
| 600 |
kvm_check_extension_list(KVMState *s, const KVMCapabilityInfo *list)
|
| 601 |
{
|
| 602 |
while (list->name) {
|
| 603 |
if (!kvm_check_extension(s, list->value)) {
|
| 604 |
return list;
|
| 605 |
} |
| 606 |
list++; |
| 607 |
} |
| 608 |
return NULL; |
| 609 |
} |
| 610 |
|
| 611 |
static void kvm_set_phys_mem(MemoryRegionSection *section, bool add) |
| 612 |
{
|
| 613 |
KVMState *s = kvm_state; |
| 614 |
KVMSlot *mem, old; |
| 615 |
int err;
|
| 616 |
MemoryRegion *mr = section->mr; |
| 617 |
bool log_dirty = memory_region_is_logging(mr);
|
| 618 |
bool writeable = !mr->readonly && !mr->rom_device;
|
| 619 |
bool readonly_flag = mr->readonly || memory_region_is_romd(mr);
|
| 620 |
hwaddr start_addr = section->offset_within_address_space; |
| 621 |
ram_addr_t size = int128_get64(section->size); |
| 622 |
void *ram = NULL; |
| 623 |
unsigned delta;
|
| 624 |
|
| 625 |
/* kvm works in page size chunks, but the function may be called
|
| 626 |
with sub-page size and unaligned start address. */
|
| 627 |
delta = TARGET_PAGE_ALIGN(size) - size; |
| 628 |
if (delta > size) {
|
| 629 |
return;
|
| 630 |
} |
| 631 |
start_addr += delta; |
| 632 |
size -= delta; |
| 633 |
size &= TARGET_PAGE_MASK; |
| 634 |
if (!size || (start_addr & ~TARGET_PAGE_MASK)) {
|
| 635 |
return;
|
| 636 |
} |
| 637 |
|
| 638 |
if (!memory_region_is_ram(mr)) {
|
| 639 |
if (writeable || !kvm_readonly_mem_allowed) {
|
| 640 |
return;
|
| 641 |
} else if (!mr->romd_mode) { |
| 642 |
/* If the memory device is not in romd_mode, then we actually want
|
| 643 |
* to remove the kvm memory slot so all accesses will trap. */
|
| 644 |
add = false;
|
| 645 |
} |
| 646 |
} |
| 647 |
|
| 648 |
ram = memory_region_get_ram_ptr(mr) + section->offset_within_region + delta; |
| 649 |
|
| 650 |
while (1) { |
| 651 |
mem = kvm_lookup_overlapping_slot(s, start_addr, start_addr + size); |
| 652 |
if (!mem) {
|
| 653 |
break;
|
| 654 |
} |
| 655 |
|
| 656 |
if (add && start_addr >= mem->start_addr &&
|
| 657 |
(start_addr + size <= mem->start_addr + mem->memory_size) && |
| 658 |
(ram - start_addr == mem->ram - mem->start_addr)) {
|
| 659 |
/* The new slot fits into the existing one and comes with
|
| 660 |
* identical parameters - update flags and done. */
|
| 661 |
kvm_slot_dirty_pages_log_change(mem, log_dirty); |
| 662 |
return;
|
| 663 |
} |
| 664 |
|
| 665 |
old = *mem; |
| 666 |
|
| 667 |
if (mem->flags & KVM_MEM_LOG_DIRTY_PAGES) {
|
| 668 |
kvm_physical_sync_dirty_bitmap(section); |
| 669 |
} |
| 670 |
|
| 671 |
/* unregister the overlapping slot */
|
| 672 |
mem->memory_size = 0;
|
| 673 |
err = kvm_set_user_memory_region(s, mem); |
| 674 |
if (err) {
|
| 675 |
fprintf(stderr, "%s: error unregistering overlapping slot: %s\n",
|
| 676 |
__func__, strerror(-err)); |
| 677 |
abort(); |
| 678 |
} |
| 679 |
|
| 680 |
/* Workaround for older KVM versions: we can't join slots, even not by
|
| 681 |
* unregistering the previous ones and then registering the larger
|
| 682 |
* slot. We have to maintain the existing fragmentation. Sigh.
|
| 683 |
*
|
| 684 |
* This workaround assumes that the new slot starts at the same
|
| 685 |
* address as the first existing one. If not or if some overlapping
|
| 686 |
* slot comes around later, we will fail (not seen in practice so far)
|
| 687 |
* - and actually require a recent KVM version. */
|
| 688 |
if (s->broken_set_mem_region &&
|
| 689 |
old.start_addr == start_addr && old.memory_size < size && add) {
|
| 690 |
mem = kvm_alloc_slot(s); |
| 691 |
mem->memory_size = old.memory_size; |
| 692 |
mem->start_addr = old.start_addr; |
| 693 |
mem->ram = old.ram; |
| 694 |
mem->flags = kvm_mem_flags(s, log_dirty, readonly_flag); |
| 695 |
|
| 696 |
err = kvm_set_user_memory_region(s, mem); |
| 697 |
if (err) {
|
| 698 |
fprintf(stderr, "%s: error updating slot: %s\n", __func__,
|
| 699 |
strerror(-err)); |
| 700 |
abort(); |
| 701 |
} |
| 702 |
|
| 703 |
start_addr += old.memory_size; |
| 704 |
ram += old.memory_size; |
| 705 |
size -= old.memory_size; |
| 706 |
continue;
|
| 707 |
} |
| 708 |
|
| 709 |
/* register prefix slot */
|
| 710 |
if (old.start_addr < start_addr) {
|
| 711 |
mem = kvm_alloc_slot(s); |
| 712 |
mem->memory_size = start_addr - old.start_addr; |
| 713 |
mem->start_addr = old.start_addr; |
| 714 |
mem->ram = old.ram; |
| 715 |
mem->flags = kvm_mem_flags(s, log_dirty, readonly_flag); |
| 716 |
|
| 717 |
err = kvm_set_user_memory_region(s, mem); |
| 718 |
if (err) {
|
| 719 |
fprintf(stderr, "%s: error registering prefix slot: %s\n",
|
| 720 |
__func__, strerror(-err)); |
| 721 |
#ifdef TARGET_PPC
|
| 722 |
fprintf(stderr, "%s: This is probably because your kernel's " \
|
| 723 |
"PAGE_SIZE is too big. Please try to use 4k " \
|
| 724 |
"PAGE_SIZE!\n", __func__);
|
| 725 |
#endif
|
| 726 |
abort(); |
| 727 |
} |
| 728 |
} |
| 729 |
|
| 730 |
/* register suffix slot */
|
| 731 |
if (old.start_addr + old.memory_size > start_addr + size) {
|
| 732 |
ram_addr_t size_delta; |
| 733 |
|
| 734 |
mem = kvm_alloc_slot(s); |
| 735 |
mem->start_addr = start_addr + size; |
| 736 |
size_delta = mem->start_addr - old.start_addr; |
| 737 |
mem->memory_size = old.memory_size - size_delta; |
| 738 |
mem->ram = old.ram + size_delta; |
| 739 |
mem->flags = kvm_mem_flags(s, log_dirty, readonly_flag); |
| 740 |
|
| 741 |
err = kvm_set_user_memory_region(s, mem); |
| 742 |
if (err) {
|
| 743 |
fprintf(stderr, "%s: error registering suffix slot: %s\n",
|
| 744 |
__func__, strerror(-err)); |
| 745 |
abort(); |
| 746 |
} |
| 747 |
} |
| 748 |
} |
| 749 |
|
| 750 |
/* in case the KVM bug workaround already "consumed" the new slot */
|
| 751 |
if (!size) {
|
| 752 |
return;
|
| 753 |
} |
| 754 |
if (!add) {
|
| 755 |
return;
|
| 756 |
} |
| 757 |
mem = kvm_alloc_slot(s); |
| 758 |
mem->memory_size = size; |
| 759 |
mem->start_addr = start_addr; |
| 760 |
mem->ram = ram; |
| 761 |
mem->flags = kvm_mem_flags(s, log_dirty, readonly_flag); |
| 762 |
|
| 763 |
err = kvm_set_user_memory_region(s, mem); |
| 764 |
if (err) {
|
| 765 |
fprintf(stderr, "%s: error registering slot: %s\n", __func__,
|
| 766 |
strerror(-err)); |
| 767 |
abort(); |
| 768 |
} |
| 769 |
} |
| 770 |
|
| 771 |
static void kvm_region_add(MemoryListener *listener, |
| 772 |
MemoryRegionSection *section) |
| 773 |
{
|
| 774 |
memory_region_ref(section->mr); |
| 775 |
kvm_set_phys_mem(section, true);
|
| 776 |
} |
| 777 |
|
| 778 |
static void kvm_region_del(MemoryListener *listener, |
| 779 |
MemoryRegionSection *section) |
| 780 |
{
|
| 781 |
kvm_set_phys_mem(section, false);
|
| 782 |
memory_region_unref(section->mr); |
| 783 |
} |
| 784 |
|
| 785 |
static void kvm_log_sync(MemoryListener *listener, |
| 786 |
MemoryRegionSection *section) |
| 787 |
{
|
| 788 |
int r;
|
| 789 |
|
| 790 |
r = kvm_physical_sync_dirty_bitmap(section); |
| 791 |
if (r < 0) { |
| 792 |
abort(); |
| 793 |
} |
| 794 |
} |
| 795 |
|
| 796 |
static void kvm_log_global_start(struct MemoryListener *listener) |
| 797 |
{
|
| 798 |
int r;
|
| 799 |
|
| 800 |
r = kvm_set_migration_log(1);
|
| 801 |
assert(r >= 0);
|
| 802 |
} |
| 803 |
|
| 804 |
static void kvm_log_global_stop(struct MemoryListener *listener) |
| 805 |
{
|
| 806 |
int r;
|
| 807 |
|
| 808 |
r = kvm_set_migration_log(0);
|
| 809 |
assert(r >= 0);
|
| 810 |
} |
| 811 |
|
| 812 |
static void kvm_mem_ioeventfd_add(MemoryListener *listener, |
| 813 |
MemoryRegionSection *section, |
| 814 |
bool match_data, uint64_t data,
|
| 815 |
EventNotifier *e) |
| 816 |
{
|
| 817 |
int fd = event_notifier_get_fd(e);
|
| 818 |
int r;
|
| 819 |
|
| 820 |
r = kvm_set_ioeventfd_mmio(fd, section->offset_within_address_space, |
| 821 |
data, true, int128_get64(section->size),
|
| 822 |
match_data); |
| 823 |
if (r < 0) { |
| 824 |
fprintf(stderr, "%s: error adding ioeventfd: %s\n",
|
| 825 |
__func__, strerror(-r)); |
| 826 |
abort(); |
| 827 |
} |
| 828 |
} |
| 829 |
|
| 830 |
static void kvm_mem_ioeventfd_del(MemoryListener *listener, |
| 831 |
MemoryRegionSection *section, |
| 832 |
bool match_data, uint64_t data,
|
| 833 |
EventNotifier *e) |
| 834 |
{
|
| 835 |
int fd = event_notifier_get_fd(e);
|
| 836 |
int r;
|
| 837 |
|
| 838 |
r = kvm_set_ioeventfd_mmio(fd, section->offset_within_address_space, |
| 839 |
data, false, int128_get64(section->size),
|
| 840 |
match_data); |
| 841 |
if (r < 0) { |
| 842 |
abort(); |
| 843 |
} |
| 844 |
} |
| 845 |
|
| 846 |
static void kvm_io_ioeventfd_add(MemoryListener *listener, |
| 847 |
MemoryRegionSection *section, |
| 848 |
bool match_data, uint64_t data,
|
| 849 |
EventNotifier *e) |
| 850 |
{
|
| 851 |
int fd = event_notifier_get_fd(e);
|
| 852 |
int r;
|
| 853 |
|
| 854 |
r = kvm_set_ioeventfd_pio(fd, section->offset_within_address_space, |
| 855 |
data, true, int128_get64(section->size),
|
| 856 |
match_data); |
| 857 |
if (r < 0) { |
| 858 |
fprintf(stderr, "%s: error adding ioeventfd: %s\n",
|
| 859 |
__func__, strerror(-r)); |
| 860 |
abort(); |
| 861 |
} |
| 862 |
} |
| 863 |
|
| 864 |
static void kvm_io_ioeventfd_del(MemoryListener *listener, |
| 865 |
MemoryRegionSection *section, |
| 866 |
bool match_data, uint64_t data,
|
| 867 |
EventNotifier *e) |
| 868 |
|
| 869 |
{
|
| 870 |
int fd = event_notifier_get_fd(e);
|
| 871 |
int r;
|
| 872 |
|
| 873 |
r = kvm_set_ioeventfd_pio(fd, section->offset_within_address_space, |
| 874 |
data, false, int128_get64(section->size),
|
| 875 |
match_data); |
| 876 |
if (r < 0) { |
| 877 |
abort(); |
| 878 |
} |
| 879 |
} |
| 880 |
|
| 881 |
static MemoryListener kvm_memory_listener = {
|
| 882 |
.region_add = kvm_region_add, |
| 883 |
.region_del = kvm_region_del, |
| 884 |
.log_start = kvm_log_start, |
| 885 |
.log_stop = kvm_log_stop, |
| 886 |
.log_sync = kvm_log_sync, |
| 887 |
.log_global_start = kvm_log_global_start, |
| 888 |
.log_global_stop = kvm_log_global_stop, |
| 889 |
.eventfd_add = kvm_mem_ioeventfd_add, |
| 890 |
.eventfd_del = kvm_mem_ioeventfd_del, |
| 891 |
.coalesced_mmio_add = kvm_coalesce_mmio_region, |
| 892 |
.coalesced_mmio_del = kvm_uncoalesce_mmio_region, |
| 893 |
.priority = 10,
|
| 894 |
}; |
| 895 |
|
| 896 |
static MemoryListener kvm_io_listener = {
|
| 897 |
.eventfd_add = kvm_io_ioeventfd_add, |
| 898 |
.eventfd_del = kvm_io_ioeventfd_del, |
| 899 |
.priority = 10,
|
| 900 |
}; |
| 901 |
|
| 902 |
static void kvm_handle_interrupt(CPUState *cpu, int mask) |
| 903 |
{
|
| 904 |
cpu->interrupt_request |= mask; |
| 905 |
|
| 906 |
if (!qemu_cpu_is_self(cpu)) {
|
| 907 |
qemu_cpu_kick(cpu); |
| 908 |
} |
| 909 |
} |
| 910 |
|
| 911 |
int kvm_set_irq(KVMState *s, int irq, int level) |
| 912 |
{
|
| 913 |
struct kvm_irq_level event;
|
| 914 |
int ret;
|
| 915 |
|
| 916 |
assert(kvm_async_interrupts_enabled()); |
| 917 |
|
| 918 |
event.level = level; |
| 919 |
event.irq = irq; |
| 920 |
ret = kvm_vm_ioctl(s, s->irq_set_ioctl, &event); |
| 921 |
if (ret < 0) { |
| 922 |
perror("kvm_set_irq");
|
| 923 |
abort(); |
| 924 |
} |
| 925 |
|
| 926 |
return (s->irq_set_ioctl == KVM_IRQ_LINE) ? 1 : event.status; |
| 927 |
} |
| 928 |
|
| 929 |
#ifdef KVM_CAP_IRQ_ROUTING
|
| 930 |
typedef struct KVMMSIRoute { |
| 931 |
struct kvm_irq_routing_entry kroute;
|
| 932 |
QTAILQ_ENTRY(KVMMSIRoute) entry; |
| 933 |
} KVMMSIRoute; |
| 934 |
|
| 935 |
static void set_gsi(KVMState *s, unsigned int gsi) |
| 936 |
{
|
| 937 |
s->used_gsi_bitmap[gsi / 32] |= 1U << (gsi % 32); |
| 938 |
} |
| 939 |
|
| 940 |
static void clear_gsi(KVMState *s, unsigned int gsi) |
| 941 |
{
|
| 942 |
s->used_gsi_bitmap[gsi / 32] &= ~(1U << (gsi % 32)); |
| 943 |
} |
| 944 |
|
| 945 |
void kvm_init_irq_routing(KVMState *s)
|
| 946 |
{
|
| 947 |
int gsi_count, i;
|
| 948 |
|
| 949 |
gsi_count = kvm_check_extension(s, KVM_CAP_IRQ_ROUTING); |
| 950 |
if (gsi_count > 0) { |
| 951 |
unsigned int gsi_bits, i; |
| 952 |
|
| 953 |
/* Round up so we can search ints using ffs */
|
| 954 |
gsi_bits = ALIGN(gsi_count, 32);
|
| 955 |
s->used_gsi_bitmap = g_malloc0(gsi_bits / 8);
|
| 956 |
s->gsi_count = gsi_count; |
| 957 |
|
| 958 |
/* Mark any over-allocated bits as already in use */
|
| 959 |
for (i = gsi_count; i < gsi_bits; i++) {
|
| 960 |
set_gsi(s, i); |
| 961 |
} |
| 962 |
} |
| 963 |
|
| 964 |
s->irq_routes = g_malloc0(sizeof(*s->irq_routes));
|
| 965 |
s->nr_allocated_irq_routes = 0;
|
| 966 |
|
| 967 |
if (!s->direct_msi) {
|
| 968 |
for (i = 0; i < KVM_MSI_HASHTAB_SIZE; i++) { |
| 969 |
QTAILQ_INIT(&s->msi_hashtab[i]); |
| 970 |
} |
| 971 |
} |
| 972 |
|
| 973 |
kvm_arch_init_irq_routing(s); |
| 974 |
} |
| 975 |
|
| 976 |
void kvm_irqchip_commit_routes(KVMState *s)
|
| 977 |
{
|
| 978 |
int ret;
|
| 979 |
|
| 980 |
s->irq_routes->flags = 0;
|
| 981 |
ret = kvm_vm_ioctl(s, KVM_SET_GSI_ROUTING, s->irq_routes); |
| 982 |
assert(ret == 0);
|
| 983 |
} |
| 984 |
|
| 985 |
static void kvm_add_routing_entry(KVMState *s, |
| 986 |
struct kvm_irq_routing_entry *entry)
|
| 987 |
{
|
| 988 |
struct kvm_irq_routing_entry *new;
|
| 989 |
int n, size;
|
| 990 |
|
| 991 |
if (s->irq_routes->nr == s->nr_allocated_irq_routes) {
|
| 992 |
n = s->nr_allocated_irq_routes * 2;
|
| 993 |
if (n < 64) { |
| 994 |
n = 64;
|
| 995 |
} |
| 996 |
size = sizeof(struct kvm_irq_routing); |
| 997 |
size += n * sizeof(*new);
|
| 998 |
s->irq_routes = g_realloc(s->irq_routes, size); |
| 999 |
s->nr_allocated_irq_routes = n; |
| 1000 |
} |
| 1001 |
n = s->irq_routes->nr++; |
| 1002 |
new = &s->irq_routes->entries[n]; |
| 1003 |
|
| 1004 |
*new = *entry; |
| 1005 |
|
| 1006 |
set_gsi(s, entry->gsi); |
| 1007 |
} |
| 1008 |
|
| 1009 |
static int kvm_update_routing_entry(KVMState *s, |
| 1010 |
struct kvm_irq_routing_entry *new_entry)
|
| 1011 |
{
|
| 1012 |
struct kvm_irq_routing_entry *entry;
|
| 1013 |
int n;
|
| 1014 |
|
| 1015 |
for (n = 0; n < s->irq_routes->nr; n++) { |
| 1016 |
entry = &s->irq_routes->entries[n]; |
| 1017 |
if (entry->gsi != new_entry->gsi) {
|
| 1018 |
continue;
|
| 1019 |
} |
| 1020 |
|
| 1021 |
if(!memcmp(entry, new_entry, sizeof *entry)) { |
| 1022 |
return 0; |
| 1023 |
} |
| 1024 |
|
| 1025 |
*entry = *new_entry; |
| 1026 |
|
| 1027 |
kvm_irqchip_commit_routes(s); |
| 1028 |
|
| 1029 |
return 0; |
| 1030 |
} |
| 1031 |
|
| 1032 |
return -ESRCH;
|
| 1033 |
} |
| 1034 |
|
| 1035 |
void kvm_irqchip_add_irq_route(KVMState *s, int irq, int irqchip, int pin) |
| 1036 |
{
|
| 1037 |
struct kvm_irq_routing_entry e = {};
|
| 1038 |
|
| 1039 |
assert(pin < s->gsi_count); |
| 1040 |
|
| 1041 |
e.gsi = irq; |
| 1042 |
e.type = KVM_IRQ_ROUTING_IRQCHIP; |
| 1043 |
e.flags = 0;
|
| 1044 |
e.u.irqchip.irqchip = irqchip; |
| 1045 |
e.u.irqchip.pin = pin; |
| 1046 |
kvm_add_routing_entry(s, &e); |
| 1047 |
} |
| 1048 |
|
| 1049 |
void kvm_irqchip_release_virq(KVMState *s, int virq) |
| 1050 |
{
|
| 1051 |
struct kvm_irq_routing_entry *e;
|
| 1052 |
int i;
|
| 1053 |
|
| 1054 |
if (kvm_gsi_direct_mapping()) {
|
| 1055 |
return;
|
| 1056 |
} |
| 1057 |
|
| 1058 |
for (i = 0; i < s->irq_routes->nr; i++) { |
| 1059 |
e = &s->irq_routes->entries[i]; |
| 1060 |
if (e->gsi == virq) {
|
| 1061 |
s->irq_routes->nr--; |
| 1062 |
*e = s->irq_routes->entries[s->irq_routes->nr]; |
| 1063 |
} |
| 1064 |
} |
| 1065 |
clear_gsi(s, virq); |
| 1066 |
} |
| 1067 |
|
| 1068 |
static unsigned int kvm_hash_msi(uint32_t data) |
| 1069 |
{
|
| 1070 |
/* This is optimized for IA32 MSI layout. However, no other arch shall
|
| 1071 |
* repeat the mistake of not providing a direct MSI injection API. */
|
| 1072 |
return data & 0xff; |
| 1073 |
} |
| 1074 |
|
| 1075 |
static void kvm_flush_dynamic_msi_routes(KVMState *s) |
| 1076 |
{
|
| 1077 |
KVMMSIRoute *route, *next; |
| 1078 |
unsigned int hash; |
| 1079 |
|
| 1080 |
for (hash = 0; hash < KVM_MSI_HASHTAB_SIZE; hash++) { |
| 1081 |
QTAILQ_FOREACH_SAFE(route, &s->msi_hashtab[hash], entry, next) {
|
| 1082 |
kvm_irqchip_release_virq(s, route->kroute.gsi); |
| 1083 |
QTAILQ_REMOVE(&s->msi_hashtab[hash], route, entry); |
| 1084 |
g_free(route); |
| 1085 |
} |
| 1086 |
} |
| 1087 |
} |
| 1088 |
|
| 1089 |
static int kvm_irqchip_get_virq(KVMState *s) |
| 1090 |
{
|
| 1091 |
uint32_t *word = s->used_gsi_bitmap; |
| 1092 |
int max_words = ALIGN(s->gsi_count, 32) / 32; |
| 1093 |
int i, bit;
|
| 1094 |
bool retry = true; |
| 1095 |
|
| 1096 |
again:
|
| 1097 |
/* Return the lowest unused GSI in the bitmap */
|
| 1098 |
for (i = 0; i < max_words; i++) { |
| 1099 |
bit = ffs(~word[i]); |
| 1100 |
if (!bit) {
|
| 1101 |
continue;
|
| 1102 |
} |
| 1103 |
|
| 1104 |
return bit - 1 + i * 32; |
| 1105 |
} |
| 1106 |
if (!s->direct_msi && retry) {
|
| 1107 |
retry = false;
|
| 1108 |
kvm_flush_dynamic_msi_routes(s); |
| 1109 |
goto again;
|
| 1110 |
} |
| 1111 |
return -ENOSPC;
|
| 1112 |
|
| 1113 |
} |
| 1114 |
|
| 1115 |
static KVMMSIRoute *kvm_lookup_msi_route(KVMState *s, MSIMessage msg)
|
| 1116 |
{
|
| 1117 |
unsigned int hash = kvm_hash_msi(msg.data); |
| 1118 |
KVMMSIRoute *route; |
| 1119 |
|
| 1120 |
QTAILQ_FOREACH(route, &s->msi_hashtab[hash], entry) {
|
| 1121 |
if (route->kroute.u.msi.address_lo == (uint32_t)msg.address &&
|
| 1122 |
route->kroute.u.msi.address_hi == (msg.address >> 32) &&
|
| 1123 |
route->kroute.u.msi.data == le32_to_cpu(msg.data)) {
|
| 1124 |
return route;
|
| 1125 |
} |
| 1126 |
} |
| 1127 |
return NULL; |
| 1128 |
} |
| 1129 |
|
| 1130 |
int kvm_irqchip_send_msi(KVMState *s, MSIMessage msg)
|
| 1131 |
{
|
| 1132 |
struct kvm_msi msi;
|
| 1133 |
KVMMSIRoute *route; |
| 1134 |
|
| 1135 |
if (s->direct_msi) {
|
| 1136 |
msi.address_lo = (uint32_t)msg.address; |
| 1137 |
msi.address_hi = msg.address >> 32;
|
| 1138 |
msi.data = le32_to_cpu(msg.data); |
| 1139 |
msi.flags = 0;
|
| 1140 |
memset(msi.pad, 0, sizeof(msi.pad)); |
| 1141 |
|
| 1142 |
return kvm_vm_ioctl(s, KVM_SIGNAL_MSI, &msi);
|
| 1143 |
} |
| 1144 |
|
| 1145 |
route = kvm_lookup_msi_route(s, msg); |
| 1146 |
if (!route) {
|
| 1147 |
int virq;
|
| 1148 |
|
| 1149 |
virq = kvm_irqchip_get_virq(s); |
| 1150 |
if (virq < 0) { |
| 1151 |
return virq;
|
| 1152 |
} |
| 1153 |
|
| 1154 |
route = g_malloc0(sizeof(KVMMSIRoute));
|
| 1155 |
route->kroute.gsi = virq; |
| 1156 |
route->kroute.type = KVM_IRQ_ROUTING_MSI; |
| 1157 |
route->kroute.flags = 0;
|
| 1158 |
route->kroute.u.msi.address_lo = (uint32_t)msg.address; |
| 1159 |
route->kroute.u.msi.address_hi = msg.address >> 32;
|
| 1160 |
route->kroute.u.msi.data = le32_to_cpu(msg.data); |
| 1161 |
|
| 1162 |
kvm_add_routing_entry(s, &route->kroute); |
| 1163 |
kvm_irqchip_commit_routes(s); |
| 1164 |
|
| 1165 |
QTAILQ_INSERT_TAIL(&s->msi_hashtab[kvm_hash_msi(msg.data)], route, |
| 1166 |
entry); |
| 1167 |
} |
| 1168 |
|
| 1169 |
assert(route->kroute.type == KVM_IRQ_ROUTING_MSI); |
| 1170 |
|
| 1171 |
return kvm_set_irq(s, route->kroute.gsi, 1); |
| 1172 |
} |
| 1173 |
|
| 1174 |
int kvm_irqchip_add_msi_route(KVMState *s, MSIMessage msg)
|
| 1175 |
{
|
| 1176 |
struct kvm_irq_routing_entry kroute = {};
|
| 1177 |
int virq;
|
| 1178 |
|
| 1179 |
if (kvm_gsi_direct_mapping()) {
|
| 1180 |
return msg.data & 0xffff; |
| 1181 |
} |
| 1182 |
|
| 1183 |
if (!kvm_gsi_routing_enabled()) {
|
| 1184 |
return -ENOSYS;
|
| 1185 |
} |
| 1186 |
|
| 1187 |
virq = kvm_irqchip_get_virq(s); |
| 1188 |
if (virq < 0) { |
| 1189 |
return virq;
|
| 1190 |
} |
| 1191 |
|
| 1192 |
kroute.gsi = virq; |
| 1193 |
kroute.type = KVM_IRQ_ROUTING_MSI; |
| 1194 |
kroute.flags = 0;
|
| 1195 |
kroute.u.msi.address_lo = (uint32_t)msg.address; |
| 1196 |
kroute.u.msi.address_hi = msg.address >> 32;
|
| 1197 |
kroute.u.msi.data = le32_to_cpu(msg.data); |
| 1198 |
|
| 1199 |
kvm_add_routing_entry(s, &kroute); |
| 1200 |
kvm_irqchip_commit_routes(s); |
| 1201 |
|
| 1202 |
return virq;
|
| 1203 |
} |
| 1204 |
|
| 1205 |
int kvm_irqchip_update_msi_route(KVMState *s, int virq, MSIMessage msg) |
| 1206 |
{
|
| 1207 |
struct kvm_irq_routing_entry kroute = {};
|
| 1208 |
|
| 1209 |
if (kvm_gsi_direct_mapping()) {
|
| 1210 |
return 0; |
| 1211 |
} |
| 1212 |
|
| 1213 |
if (!kvm_irqchip_in_kernel()) {
|
| 1214 |
return -ENOSYS;
|
| 1215 |
} |
| 1216 |
|
| 1217 |
kroute.gsi = virq; |
| 1218 |
kroute.type = KVM_IRQ_ROUTING_MSI; |
| 1219 |
kroute.flags = 0;
|
| 1220 |
kroute.u.msi.address_lo = (uint32_t)msg.address; |
| 1221 |
kroute.u.msi.address_hi = msg.address >> 32;
|
| 1222 |
kroute.u.msi.data = le32_to_cpu(msg.data); |
| 1223 |
|
| 1224 |
return kvm_update_routing_entry(s, &kroute);
|
| 1225 |
} |
| 1226 |
|
| 1227 |
static int kvm_irqchip_assign_irqfd(KVMState *s, int fd, int rfd, int virq, |
| 1228 |
bool assign)
|
| 1229 |
{
|
| 1230 |
struct kvm_irqfd irqfd = {
|
| 1231 |
.fd = fd, |
| 1232 |
.gsi = virq, |
| 1233 |
.flags = assign ? 0 : KVM_IRQFD_FLAG_DEASSIGN,
|
| 1234 |
}; |
| 1235 |
|
| 1236 |
if (rfd != -1) { |
| 1237 |
irqfd.flags |= KVM_IRQFD_FLAG_RESAMPLE; |
| 1238 |
irqfd.resamplefd = rfd; |
| 1239 |
} |
| 1240 |
|
| 1241 |
if (!kvm_irqfds_enabled()) {
|
| 1242 |
return -ENOSYS;
|
| 1243 |
} |
| 1244 |
|
| 1245 |
return kvm_vm_ioctl(s, KVM_IRQFD, &irqfd);
|
| 1246 |
} |
| 1247 |
|
| 1248 |
#else /* !KVM_CAP_IRQ_ROUTING */ |
| 1249 |
|
| 1250 |
void kvm_init_irq_routing(KVMState *s)
|
| 1251 |
{
|
| 1252 |
} |
| 1253 |
|
| 1254 |
void kvm_irqchip_release_virq(KVMState *s, int virq) |
| 1255 |
{
|
| 1256 |
} |
| 1257 |
|
| 1258 |
int kvm_irqchip_send_msi(KVMState *s, MSIMessage msg)
|
| 1259 |
{
|
| 1260 |
abort(); |
| 1261 |
} |
| 1262 |
|
| 1263 |
int kvm_irqchip_add_msi_route(KVMState *s, MSIMessage msg)
|
| 1264 |
{
|
| 1265 |
return -ENOSYS;
|
| 1266 |
} |
| 1267 |
|
| 1268 |
static int kvm_irqchip_assign_irqfd(KVMState *s, int fd, int virq, bool assign) |
| 1269 |
{
|
| 1270 |
abort(); |
| 1271 |
} |
| 1272 |
|
| 1273 |
int kvm_irqchip_update_msi_route(KVMState *s, int virq, MSIMessage msg) |
| 1274 |
{
|
| 1275 |
return -ENOSYS;
|
| 1276 |
} |
| 1277 |
#endif /* !KVM_CAP_IRQ_ROUTING */ |
| 1278 |
|
| 1279 |
int kvm_irqchip_add_irqfd_notifier(KVMState *s, EventNotifier *n,
|
| 1280 |
EventNotifier *rn, int virq)
|
| 1281 |
{
|
| 1282 |
return kvm_irqchip_assign_irqfd(s, event_notifier_get_fd(n),
|
| 1283 |
rn ? event_notifier_get_fd(rn) : -1, virq, true); |
| 1284 |
} |
| 1285 |
|
| 1286 |
int kvm_irqchip_remove_irqfd_notifier(KVMState *s, EventNotifier *n, int virq) |
| 1287 |
{
|
| 1288 |
return kvm_irqchip_assign_irqfd(s, event_notifier_get_fd(n), -1, virq, |
| 1289 |
false);
|
| 1290 |
} |
| 1291 |
|
| 1292 |
static int kvm_irqchip_create(KVMState *s) |
| 1293 |
{
|
| 1294 |
int ret;
|
| 1295 |
|
| 1296 |
if (!qemu_opt_get_bool(qemu_get_machine_opts(), "kernel_irqchip", true) || |
| 1297 |
!kvm_check_extension(s, KVM_CAP_IRQCHIP)) {
|
| 1298 |
return 0; |
| 1299 |
} |
| 1300 |
|
| 1301 |
/* First probe and see if there's a arch-specific hook to create the
|
| 1302 |
* in-kernel irqchip for us */
|
| 1303 |
ret = kvm_arch_irqchip_create(s); |
| 1304 |
if (ret < 0) { |
| 1305 |
return ret;
|
| 1306 |
} else if (ret == 0) { |
| 1307 |
ret = kvm_vm_ioctl(s, KVM_CREATE_IRQCHIP); |
| 1308 |
if (ret < 0) { |
| 1309 |
fprintf(stderr, "Create kernel irqchip failed\n");
|
| 1310 |
return ret;
|
| 1311 |
} |
| 1312 |
} |
| 1313 |
|
| 1314 |
kvm_kernel_irqchip = true;
|
| 1315 |
/* If we have an in-kernel IRQ chip then we must have asynchronous
|
| 1316 |
* interrupt delivery (though the reverse is not necessarily true)
|
| 1317 |
*/
|
| 1318 |
kvm_async_interrupts_allowed = true;
|
| 1319 |
kvm_halt_in_kernel_allowed = true;
|
| 1320 |
|
| 1321 |
kvm_init_irq_routing(s); |
| 1322 |
|
| 1323 |
return 0; |
| 1324 |
} |
| 1325 |
|
| 1326 |
/* Find number of supported CPUs using the recommended
|
| 1327 |
* procedure from the kernel API documentation to cope with
|
| 1328 |
* older kernels that may be missing capabilities.
|
| 1329 |
*/
|
| 1330 |
static int kvm_recommended_vcpus(KVMState *s) |
| 1331 |
{
|
| 1332 |
int ret = kvm_check_extension(s, KVM_CAP_NR_VCPUS);
|
| 1333 |
return (ret) ? ret : 4; |
| 1334 |
} |
| 1335 |
|
| 1336 |
static int kvm_max_vcpus(KVMState *s) |
| 1337 |
{
|
| 1338 |
int ret = kvm_check_extension(s, KVM_CAP_MAX_VCPUS);
|
| 1339 |
return (ret) ? ret : kvm_recommended_vcpus(s);
|
| 1340 |
} |
| 1341 |
|
| 1342 |
int kvm_init(void) |
| 1343 |
{
|
| 1344 |
static const char upgrade_note[] = |
| 1345 |
"Please upgrade to at least kernel 2.6.29 or recent kvm-kmod\n"
|
| 1346 |
"(see http://sourceforge.net/projects/kvm).\n";
|
| 1347 |
struct {
|
| 1348 |
const char *name; |
| 1349 |
int num;
|
| 1350 |
} num_cpus[] = {
|
| 1351 |
{ "SMP", smp_cpus },
|
| 1352 |
{ "hotpluggable", max_cpus },
|
| 1353 |
{ NULL, }
|
| 1354 |
}, *nc = num_cpus; |
| 1355 |
int soft_vcpus_limit, hard_vcpus_limit;
|
| 1356 |
KVMState *s; |
| 1357 |
const KVMCapabilityInfo *missing_cap;
|
| 1358 |
int ret;
|
| 1359 |
int i;
|
| 1360 |
|
| 1361 |
s = g_malloc0(sizeof(KVMState));
|
| 1362 |
|
| 1363 |
/*
|
| 1364 |
* On systems where the kernel can support different base page
|
| 1365 |
* sizes, host page size may be different from TARGET_PAGE_SIZE,
|
| 1366 |
* even with KVM. TARGET_PAGE_SIZE is assumed to be the minimum
|
| 1367 |
* page size for the system though.
|
| 1368 |
*/
|
| 1369 |
assert(TARGET_PAGE_SIZE <= getpagesize()); |
| 1370 |
page_size_init(); |
| 1371 |
|
| 1372 |
#ifdef KVM_CAP_SET_GUEST_DEBUG
|
| 1373 |
QTAILQ_INIT(&s->kvm_sw_breakpoints); |
| 1374 |
#endif
|
| 1375 |
s->vmfd = -1;
|
| 1376 |
s->fd = qemu_open("/dev/kvm", O_RDWR);
|
| 1377 |
if (s->fd == -1) { |
| 1378 |
fprintf(stderr, "Could not access KVM kernel module: %m\n");
|
| 1379 |
ret = -errno; |
| 1380 |
goto err;
|
| 1381 |
} |
| 1382 |
|
| 1383 |
ret = kvm_ioctl(s, KVM_GET_API_VERSION, 0);
|
| 1384 |
if (ret < KVM_API_VERSION) {
|
| 1385 |
if (ret > 0) { |
| 1386 |
ret = -EINVAL; |
| 1387 |
} |
| 1388 |
fprintf(stderr, "kvm version too old\n");
|
| 1389 |
goto err;
|
| 1390 |
} |
| 1391 |
|
| 1392 |
if (ret > KVM_API_VERSION) {
|
| 1393 |
ret = -EINVAL; |
| 1394 |
fprintf(stderr, "kvm version not supported\n");
|
| 1395 |
goto err;
|
| 1396 |
} |
| 1397 |
|
| 1398 |
s->nr_slots = kvm_check_extension(s, KVM_CAP_NR_MEMSLOTS); |
| 1399 |
|
| 1400 |
/* If unspecified, use the default value */
|
| 1401 |
if (!s->nr_slots) {
|
| 1402 |
s->nr_slots = 32;
|
| 1403 |
} |
| 1404 |
|
| 1405 |
s->slots = g_malloc0(s->nr_slots * sizeof(KVMSlot));
|
| 1406 |
|
| 1407 |
for (i = 0; i < s->nr_slots; i++) { |
| 1408 |
s->slots[i].slot = i; |
| 1409 |
} |
| 1410 |
|
| 1411 |
/* check the vcpu limits */
|
| 1412 |
soft_vcpus_limit = kvm_recommended_vcpus(s); |
| 1413 |
hard_vcpus_limit = kvm_max_vcpus(s); |
| 1414 |
|
| 1415 |
while (nc->name) {
|
| 1416 |
if (nc->num > soft_vcpus_limit) {
|
| 1417 |
fprintf(stderr, |
| 1418 |
"Warning: Number of %s cpus requested (%d) exceeds "
|
| 1419 |
"the recommended cpus supported by KVM (%d)\n",
|
| 1420 |
nc->name, nc->num, soft_vcpus_limit); |
| 1421 |
|
| 1422 |
if (nc->num > hard_vcpus_limit) {
|
| 1423 |
ret = -EINVAL; |
| 1424 |
fprintf(stderr, "Number of %s cpus requested (%d) exceeds "
|
| 1425 |
"the maximum cpus supported by KVM (%d)\n",
|
| 1426 |
nc->name, nc->num, hard_vcpus_limit); |
| 1427 |
goto err;
|
| 1428 |
} |
| 1429 |
} |
| 1430 |
nc++; |
| 1431 |
} |
| 1432 |
|
| 1433 |
do {
|
| 1434 |
ret = kvm_ioctl(s, KVM_CREATE_VM, 0);
|
| 1435 |
} while (ret == -EINTR);
|
| 1436 |
|
| 1437 |
if (ret < 0) { |
| 1438 |
fprintf(stderr, "ioctl(KVM_CREATE_VM) failed: %d %s\n", -ret,
|
| 1439 |
strerror(-ret)); |
| 1440 |
|
| 1441 |
#ifdef TARGET_S390X
|
| 1442 |
fprintf(stderr, "Please add the 'switch_amode' kernel parameter to "
|
| 1443 |
"your host kernel command line\n");
|
| 1444 |
#endif
|
| 1445 |
goto err;
|
| 1446 |
} |
| 1447 |
|
| 1448 |
s->vmfd = ret; |
| 1449 |
missing_cap = kvm_check_extension_list(s, kvm_required_capabilites); |
| 1450 |
if (!missing_cap) {
|
| 1451 |
missing_cap = |
| 1452 |
kvm_check_extension_list(s, kvm_arch_required_capabilities); |
| 1453 |
} |
| 1454 |
if (missing_cap) {
|
| 1455 |
ret = -EINVAL; |
| 1456 |
fprintf(stderr, "kvm does not support %s\n%s",
|
| 1457 |
missing_cap->name, upgrade_note); |
| 1458 |
goto err;
|
| 1459 |
} |
| 1460 |
|
| 1461 |
s->coalesced_mmio = kvm_check_extension(s, KVM_CAP_COALESCED_MMIO); |
| 1462 |
|
| 1463 |
s->broken_set_mem_region = 1;
|
| 1464 |
ret = kvm_check_extension(s, KVM_CAP_JOIN_MEMORY_REGIONS_WORKS); |
| 1465 |
if (ret > 0) { |
| 1466 |
s->broken_set_mem_region = 0;
|
| 1467 |
} |
| 1468 |
|
| 1469 |
#ifdef KVM_CAP_VCPU_EVENTS
|
| 1470 |
s->vcpu_events = kvm_check_extension(s, KVM_CAP_VCPU_EVENTS); |
| 1471 |
#endif
|
| 1472 |
|
| 1473 |
s->robust_singlestep = |
| 1474 |
kvm_check_extension(s, KVM_CAP_X86_ROBUST_SINGLESTEP); |
| 1475 |
|
| 1476 |
#ifdef KVM_CAP_DEBUGREGS
|
| 1477 |
s->debugregs = kvm_check_extension(s, KVM_CAP_DEBUGREGS); |
| 1478 |
#endif
|
| 1479 |
|
| 1480 |
#ifdef KVM_CAP_XSAVE
|
| 1481 |
s->xsave = kvm_check_extension(s, KVM_CAP_XSAVE); |
| 1482 |
#endif
|
| 1483 |
|
| 1484 |
#ifdef KVM_CAP_XCRS
|
| 1485 |
s->xcrs = kvm_check_extension(s, KVM_CAP_XCRS); |
| 1486 |
#endif
|
| 1487 |
|
| 1488 |
#ifdef KVM_CAP_PIT_STATE2
|
| 1489 |
s->pit_state2 = kvm_check_extension(s, KVM_CAP_PIT_STATE2); |
| 1490 |
#endif
|
| 1491 |
|
| 1492 |
#ifdef KVM_CAP_IRQ_ROUTING
|
| 1493 |
s->direct_msi = (kvm_check_extension(s, KVM_CAP_SIGNAL_MSI) > 0);
|
| 1494 |
#endif
|
| 1495 |
|
| 1496 |
s->intx_set_mask = kvm_check_extension(s, KVM_CAP_PCI_2_3); |
| 1497 |
|
| 1498 |
s->irq_set_ioctl = KVM_IRQ_LINE; |
| 1499 |
if (kvm_check_extension(s, KVM_CAP_IRQ_INJECT_STATUS)) {
|
| 1500 |
s->irq_set_ioctl = KVM_IRQ_LINE_STATUS; |
| 1501 |
} |
| 1502 |
|
| 1503 |
#ifdef KVM_CAP_READONLY_MEM
|
| 1504 |
kvm_readonly_mem_allowed = |
| 1505 |
(kvm_check_extension(s, KVM_CAP_READONLY_MEM) > 0);
|
| 1506 |
#endif
|
| 1507 |
|
| 1508 |
ret = kvm_arch_init(s); |
| 1509 |
if (ret < 0) { |
| 1510 |
goto err;
|
| 1511 |
} |
| 1512 |
|
| 1513 |
ret = kvm_irqchip_create(s); |
| 1514 |
if (ret < 0) { |
| 1515 |
goto err;
|
| 1516 |
} |
| 1517 |
|
| 1518 |
kvm_state = s; |
| 1519 |
memory_listener_register(&kvm_memory_listener, &address_space_memory); |
| 1520 |
memory_listener_register(&kvm_io_listener, &address_space_io); |
| 1521 |
|
| 1522 |
s->many_ioeventfds = kvm_check_many_ioeventfds(); |
| 1523 |
|
| 1524 |
cpu_interrupt_handler = kvm_handle_interrupt; |
| 1525 |
|
| 1526 |
return 0; |
| 1527 |
|
| 1528 |
err:
|
| 1529 |
if (s->vmfd >= 0) { |
| 1530 |
close(s->vmfd); |
| 1531 |
} |
| 1532 |
if (s->fd != -1) { |
| 1533 |
close(s->fd); |
| 1534 |
} |
| 1535 |
g_free(s->slots); |
| 1536 |
g_free(s); |
| 1537 |
|
| 1538 |
return ret;
|
| 1539 |
} |
| 1540 |
|
| 1541 |
static void kvm_handle_io(uint16_t port, void *data, int direction, int size, |
| 1542 |
uint32_t count) |
| 1543 |
{
|
| 1544 |
int i;
|
| 1545 |
uint8_t *ptr = data; |
| 1546 |
|
| 1547 |
for (i = 0; i < count; i++) { |
| 1548 |
address_space_rw(&address_space_io, port, ptr, size, |
| 1549 |
direction == KVM_EXIT_IO_OUT); |
| 1550 |
ptr += size; |
| 1551 |
} |
| 1552 |
} |
| 1553 |
|
| 1554 |
static int kvm_handle_internal_error(CPUState *cpu, struct kvm_run *run) |
| 1555 |
{
|
| 1556 |
fprintf(stderr, "KVM internal error. Suberror: %d\n",
|
| 1557 |
run->internal.suberror); |
| 1558 |
|
| 1559 |
if (kvm_check_extension(kvm_state, KVM_CAP_INTERNAL_ERROR_DATA)) {
|
| 1560 |
int i;
|
| 1561 |
|
| 1562 |
for (i = 0; i < run->internal.ndata; ++i) { |
| 1563 |
fprintf(stderr, "extra data[%d]: %"PRIx64"\n", |
| 1564 |
i, (uint64_t)run->internal.data[i]); |
| 1565 |
} |
| 1566 |
} |
| 1567 |
if (run->internal.suberror == KVM_INTERNAL_ERROR_EMULATION) {
|
| 1568 |
fprintf(stderr, "emulation failure\n");
|
| 1569 |
if (!kvm_arch_stop_on_emulation_error(cpu)) {
|
| 1570 |
cpu_dump_state(cpu, stderr, fprintf, CPU_DUMP_CODE); |
| 1571 |
return EXCP_INTERRUPT;
|
| 1572 |
} |
| 1573 |
} |
| 1574 |
/* FIXME: Should trigger a qmp message to let management know
|
| 1575 |
* something went wrong.
|
| 1576 |
*/
|
| 1577 |
return -1; |
| 1578 |
} |
| 1579 |
|
| 1580 |
void kvm_flush_coalesced_mmio_buffer(void) |
| 1581 |
{
|
| 1582 |
KVMState *s = kvm_state; |
| 1583 |
|
| 1584 |
if (s->coalesced_flush_in_progress) {
|
| 1585 |
return;
|
| 1586 |
} |
| 1587 |
|
| 1588 |
s->coalesced_flush_in_progress = true;
|
| 1589 |
|
| 1590 |
if (s->coalesced_mmio_ring) {
|
| 1591 |
struct kvm_coalesced_mmio_ring *ring = s->coalesced_mmio_ring;
|
| 1592 |
while (ring->first != ring->last) {
|
| 1593 |
struct kvm_coalesced_mmio *ent;
|
| 1594 |
|
| 1595 |
ent = &ring->coalesced_mmio[ring->first]; |
| 1596 |
|
| 1597 |
cpu_physical_memory_write(ent->phys_addr, ent->data, ent->len); |
| 1598 |
smp_wmb(); |
| 1599 |
ring->first = (ring->first + 1) % KVM_COALESCED_MMIO_MAX;
|
| 1600 |
} |
| 1601 |
} |
| 1602 |
|
| 1603 |
s->coalesced_flush_in_progress = false;
|
| 1604 |
} |
| 1605 |
|
| 1606 |
static void do_kvm_cpu_synchronize_state(void *arg) |
| 1607 |
{
|
| 1608 |
CPUState *cpu = arg; |
| 1609 |
|
| 1610 |
if (!cpu->kvm_vcpu_dirty) {
|
| 1611 |
kvm_arch_get_registers(cpu); |
| 1612 |
cpu->kvm_vcpu_dirty = true;
|
| 1613 |
} |
| 1614 |
} |
| 1615 |
|
| 1616 |
void kvm_cpu_synchronize_state(CPUState *cpu)
|
| 1617 |
{
|
| 1618 |
if (!cpu->kvm_vcpu_dirty) {
|
| 1619 |
run_on_cpu(cpu, do_kvm_cpu_synchronize_state, cpu); |
| 1620 |
} |
| 1621 |
} |
| 1622 |
|
| 1623 |
void kvm_cpu_synchronize_post_reset(CPUState *cpu)
|
| 1624 |
{
|
| 1625 |
kvm_arch_put_registers(cpu, KVM_PUT_RESET_STATE); |
| 1626 |
cpu->kvm_vcpu_dirty = false;
|
| 1627 |
} |
| 1628 |
|
| 1629 |
void kvm_cpu_synchronize_post_init(CPUState *cpu)
|
| 1630 |
{
|
| 1631 |
kvm_arch_put_registers(cpu, KVM_PUT_FULL_STATE); |
| 1632 |
cpu->kvm_vcpu_dirty = false;
|
| 1633 |
} |
| 1634 |
|
| 1635 |
int kvm_cpu_exec(CPUState *cpu)
|
| 1636 |
{
|
| 1637 |
struct kvm_run *run = cpu->kvm_run;
|
| 1638 |
int ret, run_ret;
|
| 1639 |
|
| 1640 |
DPRINTF("kvm_cpu_exec()\n");
|
| 1641 |
|
| 1642 |
if (kvm_arch_process_async_events(cpu)) {
|
| 1643 |
cpu->exit_request = 0;
|
| 1644 |
return EXCP_HLT;
|
| 1645 |
} |
| 1646 |
|
| 1647 |
do {
|
| 1648 |
if (cpu->kvm_vcpu_dirty) {
|
| 1649 |
kvm_arch_put_registers(cpu, KVM_PUT_RUNTIME_STATE); |
| 1650 |
cpu->kvm_vcpu_dirty = false;
|
| 1651 |
} |
| 1652 |
|
| 1653 |
kvm_arch_pre_run(cpu, run); |
| 1654 |
if (cpu->exit_request) {
|
| 1655 |
DPRINTF("interrupt exit requested\n");
|
| 1656 |
/*
|
| 1657 |
* KVM requires us to reenter the kernel after IO exits to complete
|
| 1658 |
* instruction emulation. This self-signal will ensure that we
|
| 1659 |
* leave ASAP again.
|
| 1660 |
*/
|
| 1661 |
qemu_cpu_kick_self(); |
| 1662 |
} |
| 1663 |
qemu_mutex_unlock_iothread(); |
| 1664 |
|
| 1665 |
run_ret = kvm_vcpu_ioctl(cpu, KVM_RUN, 0);
|
| 1666 |
|
| 1667 |
qemu_mutex_lock_iothread(); |
| 1668 |
kvm_arch_post_run(cpu, run); |
| 1669 |
|
| 1670 |
if (run_ret < 0) { |
| 1671 |
if (run_ret == -EINTR || run_ret == -EAGAIN) {
|
| 1672 |
DPRINTF("io window exit\n");
|
| 1673 |
ret = EXCP_INTERRUPT; |
| 1674 |
break;
|
| 1675 |
} |
| 1676 |
fprintf(stderr, "error: kvm run failed %s\n",
|
| 1677 |
strerror(-run_ret)); |
| 1678 |
abort(); |
| 1679 |
} |
| 1680 |
|
| 1681 |
trace_kvm_run_exit(cpu->cpu_index, run->exit_reason); |
| 1682 |
switch (run->exit_reason) {
|
| 1683 |
case KVM_EXIT_IO:
|
| 1684 |
DPRINTF("handle_io\n");
|
| 1685 |
kvm_handle_io(run->io.port, |
| 1686 |
(uint8_t *)run + run->io.data_offset, |
| 1687 |
run->io.direction, |
| 1688 |
run->io.size, |
| 1689 |
run->io.count); |
| 1690 |
ret = 0;
|
| 1691 |
break;
|
| 1692 |
case KVM_EXIT_MMIO:
|
| 1693 |
DPRINTF("handle_mmio\n");
|
| 1694 |
cpu_physical_memory_rw(run->mmio.phys_addr, |
| 1695 |
run->mmio.data, |
| 1696 |
run->mmio.len, |
| 1697 |
run->mmio.is_write); |
| 1698 |
ret = 0;
|
| 1699 |
break;
|
| 1700 |
case KVM_EXIT_IRQ_WINDOW_OPEN:
|
| 1701 |
DPRINTF("irq_window_open\n");
|
| 1702 |
ret = EXCP_INTERRUPT; |
| 1703 |
break;
|
| 1704 |
case KVM_EXIT_SHUTDOWN:
|
| 1705 |
DPRINTF("shutdown\n");
|
| 1706 |
qemu_system_reset_request(); |
| 1707 |
ret = EXCP_INTERRUPT; |
| 1708 |
break;
|
| 1709 |
case KVM_EXIT_UNKNOWN:
|
| 1710 |
fprintf(stderr, "KVM: unknown exit, hardware reason %" PRIx64 "\n", |
| 1711 |
(uint64_t)run->hw.hardware_exit_reason); |
| 1712 |
ret = -1;
|
| 1713 |
break;
|
| 1714 |
case KVM_EXIT_INTERNAL_ERROR:
|
| 1715 |
ret = kvm_handle_internal_error(cpu, run); |
| 1716 |
break;
|
| 1717 |
default:
|
| 1718 |
DPRINTF("kvm_arch_handle_exit\n");
|
| 1719 |
ret = kvm_arch_handle_exit(cpu, run); |
| 1720 |
break;
|
| 1721 |
} |
| 1722 |
} while (ret == 0); |
| 1723 |
|
| 1724 |
if (ret < 0) { |
| 1725 |
cpu_dump_state(cpu, stderr, fprintf, CPU_DUMP_CODE); |
| 1726 |
vm_stop(RUN_STATE_INTERNAL_ERROR); |
| 1727 |
} |
| 1728 |
|
| 1729 |
cpu->exit_request = 0;
|
| 1730 |
return ret;
|
| 1731 |
} |
| 1732 |
|
| 1733 |
int kvm_ioctl(KVMState *s, int type, ...) |
| 1734 |
{
|
| 1735 |
int ret;
|
| 1736 |
void *arg;
|
| 1737 |
va_list ap; |
| 1738 |
|
| 1739 |
va_start(ap, type); |
| 1740 |
arg = va_arg(ap, void *);
|
| 1741 |
va_end(ap); |
| 1742 |
|
| 1743 |
trace_kvm_ioctl(type, arg); |
| 1744 |
ret = ioctl(s->fd, type, arg); |
| 1745 |
if (ret == -1) { |
| 1746 |
ret = -errno; |
| 1747 |
} |
| 1748 |
return ret;
|
| 1749 |
} |
| 1750 |
|
| 1751 |
int kvm_vm_ioctl(KVMState *s, int type, ...) |
| 1752 |
{
|
| 1753 |
int ret;
|
| 1754 |
void *arg;
|
| 1755 |
va_list ap; |
| 1756 |
|
| 1757 |
va_start(ap, type); |
| 1758 |
arg = va_arg(ap, void *);
|
| 1759 |
va_end(ap); |
| 1760 |
|
| 1761 |
trace_kvm_vm_ioctl(type, arg); |
| 1762 |
ret = ioctl(s->vmfd, type, arg); |
| 1763 |
if (ret == -1) { |
| 1764 |
ret = -errno; |
| 1765 |
} |
| 1766 |
return ret;
|
| 1767 |
} |
| 1768 |
|
| 1769 |
int kvm_vcpu_ioctl(CPUState *cpu, int type, ...) |
| 1770 |
{
|
| 1771 |
int ret;
|
| 1772 |
void *arg;
|
| 1773 |
va_list ap; |
| 1774 |
|
| 1775 |
va_start(ap, type); |
| 1776 |
arg = va_arg(ap, void *);
|
| 1777 |
va_end(ap); |
| 1778 |
|
| 1779 |
trace_kvm_vcpu_ioctl(cpu->cpu_index, type, arg); |
| 1780 |
ret = ioctl(cpu->kvm_fd, type, arg); |
| 1781 |
if (ret == -1) { |
| 1782 |
ret = -errno; |
| 1783 |
} |
| 1784 |
return ret;
|
| 1785 |
} |
| 1786 |
|
| 1787 |
int kvm_device_ioctl(int fd, int type, ...) |
| 1788 |
{
|
| 1789 |
int ret;
|
| 1790 |
void *arg;
|
| 1791 |
va_list ap; |
| 1792 |
|
| 1793 |
va_start(ap, type); |
| 1794 |
arg = va_arg(ap, void *);
|
| 1795 |
va_end(ap); |
| 1796 |
|
| 1797 |
trace_kvm_device_ioctl(fd, type, arg); |
| 1798 |
ret = ioctl(fd, type, arg); |
| 1799 |
if (ret == -1) { |
| 1800 |
ret = -errno; |
| 1801 |
} |
| 1802 |
return ret;
|
| 1803 |
} |
| 1804 |
|
| 1805 |
int kvm_has_sync_mmu(void) |
| 1806 |
{
|
| 1807 |
return kvm_check_extension(kvm_state, KVM_CAP_SYNC_MMU);
|
| 1808 |
} |
| 1809 |
|
| 1810 |
int kvm_has_vcpu_events(void) |
| 1811 |
{
|
| 1812 |
return kvm_state->vcpu_events;
|
| 1813 |
} |
| 1814 |
|
| 1815 |
int kvm_has_robust_singlestep(void) |
| 1816 |
{
|
| 1817 |
return kvm_state->robust_singlestep;
|
| 1818 |
} |
| 1819 |
|
| 1820 |
int kvm_has_debugregs(void) |
| 1821 |
{
|
| 1822 |
return kvm_state->debugregs;
|
| 1823 |
} |
| 1824 |
|
| 1825 |
int kvm_has_xsave(void) |
| 1826 |
{
|
| 1827 |
return kvm_state->xsave;
|
| 1828 |
} |
| 1829 |
|
| 1830 |
int kvm_has_xcrs(void) |
| 1831 |
{
|
| 1832 |
return kvm_state->xcrs;
|
| 1833 |
} |
| 1834 |
|
| 1835 |
int kvm_has_pit_state2(void) |
| 1836 |
{
|
| 1837 |
return kvm_state->pit_state2;
|
| 1838 |
} |
| 1839 |
|
| 1840 |
int kvm_has_many_ioeventfds(void) |
| 1841 |
{
|
| 1842 |
if (!kvm_enabled()) {
|
| 1843 |
return 0; |
| 1844 |
} |
| 1845 |
return kvm_state->many_ioeventfds;
|
| 1846 |
} |
| 1847 |
|
| 1848 |
int kvm_has_gsi_routing(void) |
| 1849 |
{
|
| 1850 |
#ifdef KVM_CAP_IRQ_ROUTING
|
| 1851 |
return kvm_check_extension(kvm_state, KVM_CAP_IRQ_ROUTING);
|
| 1852 |
#else
|
| 1853 |
return false; |
| 1854 |
#endif
|
| 1855 |
} |
| 1856 |
|
| 1857 |
int kvm_has_intx_set_mask(void) |
| 1858 |
{
|
| 1859 |
return kvm_state->intx_set_mask;
|
| 1860 |
} |
| 1861 |
|
| 1862 |
void kvm_setup_guest_memory(void *start, size_t size) |
| 1863 |
{
|
| 1864 |
#ifdef CONFIG_VALGRIND_H
|
| 1865 |
VALGRIND_MAKE_MEM_DEFINED(start, size); |
| 1866 |
#endif
|
| 1867 |
if (!kvm_has_sync_mmu()) {
|
| 1868 |
int ret = qemu_madvise(start, size, QEMU_MADV_DONTFORK);
|
| 1869 |
|
| 1870 |
if (ret) {
|
| 1871 |
perror("qemu_madvise");
|
| 1872 |
fprintf(stderr, |
| 1873 |
"Need MADV_DONTFORK in absence of synchronous KVM MMU\n");
|
| 1874 |
exit(1);
|
| 1875 |
} |
| 1876 |
} |
| 1877 |
} |
| 1878 |
|
| 1879 |
#ifdef KVM_CAP_SET_GUEST_DEBUG
|
| 1880 |
struct kvm_sw_breakpoint *kvm_find_sw_breakpoint(CPUState *cpu,
|
| 1881 |
target_ulong pc) |
| 1882 |
{
|
| 1883 |
struct kvm_sw_breakpoint *bp;
|
| 1884 |
|
| 1885 |
QTAILQ_FOREACH(bp, &cpu->kvm_state->kvm_sw_breakpoints, entry) {
|
| 1886 |
if (bp->pc == pc) {
|
| 1887 |
return bp;
|
| 1888 |
} |
| 1889 |
} |
| 1890 |
return NULL; |
| 1891 |
} |
| 1892 |
|
| 1893 |
int kvm_sw_breakpoints_active(CPUState *cpu)
|
| 1894 |
{
|
| 1895 |
return !QTAILQ_EMPTY(&cpu->kvm_state->kvm_sw_breakpoints);
|
| 1896 |
} |
| 1897 |
|
| 1898 |
struct kvm_set_guest_debug_data {
|
| 1899 |
struct kvm_guest_debug dbg;
|
| 1900 |
CPUState *cpu; |
| 1901 |
int err;
|
| 1902 |
}; |
| 1903 |
|
| 1904 |
static void kvm_invoke_set_guest_debug(void *data) |
| 1905 |
{
|
| 1906 |
struct kvm_set_guest_debug_data *dbg_data = data;
|
| 1907 |
|
| 1908 |
dbg_data->err = kvm_vcpu_ioctl(dbg_data->cpu, KVM_SET_GUEST_DEBUG, |
| 1909 |
&dbg_data->dbg); |
| 1910 |
} |
| 1911 |
|
| 1912 |
int kvm_update_guest_debug(CPUState *cpu, unsigned long reinject_trap) |
| 1913 |
{
|
| 1914 |
struct kvm_set_guest_debug_data data;
|
| 1915 |
|
| 1916 |
data.dbg.control = reinject_trap; |
| 1917 |
|
| 1918 |
if (cpu->singlestep_enabled) {
|
| 1919 |
data.dbg.control |= KVM_GUESTDBG_ENABLE | KVM_GUESTDBG_SINGLESTEP; |
| 1920 |
} |
| 1921 |
kvm_arch_update_guest_debug(cpu, &data.dbg); |
| 1922 |
data.cpu = cpu; |
| 1923 |
|
| 1924 |
run_on_cpu(cpu, kvm_invoke_set_guest_debug, &data); |
| 1925 |
return data.err;
|
| 1926 |
} |
| 1927 |
|
| 1928 |
int kvm_insert_breakpoint(CPUState *cpu, target_ulong addr,
|
| 1929 |
target_ulong len, int type)
|
| 1930 |
{
|
| 1931 |
struct kvm_sw_breakpoint *bp;
|
| 1932 |
int err;
|
| 1933 |
|
| 1934 |
if (type == GDB_BREAKPOINT_SW) {
|
| 1935 |
bp = kvm_find_sw_breakpoint(cpu, addr); |
| 1936 |
if (bp) {
|
| 1937 |
bp->use_count++; |
| 1938 |
return 0; |
| 1939 |
} |
| 1940 |
|
| 1941 |
bp = g_malloc(sizeof(struct kvm_sw_breakpoint)); |
| 1942 |
if (!bp) {
|
| 1943 |
return -ENOMEM;
|
| 1944 |
} |
| 1945 |
|
| 1946 |
bp->pc = addr; |
| 1947 |
bp->use_count = 1;
|
| 1948 |
err = kvm_arch_insert_sw_breakpoint(cpu, bp); |
| 1949 |
if (err) {
|
| 1950 |
g_free(bp); |
| 1951 |
return err;
|
| 1952 |
} |
| 1953 |
|
| 1954 |
QTAILQ_INSERT_HEAD(&cpu->kvm_state->kvm_sw_breakpoints, bp, entry); |
| 1955 |
} else {
|
| 1956 |
err = kvm_arch_insert_hw_breakpoint(addr, len, type); |
| 1957 |
if (err) {
|
| 1958 |
return err;
|
| 1959 |
} |
| 1960 |
} |
| 1961 |
|
| 1962 |
CPU_FOREACH(cpu) {
|
| 1963 |
err = kvm_update_guest_debug(cpu, 0);
|
| 1964 |
if (err) {
|
| 1965 |
return err;
|
| 1966 |
} |
| 1967 |
} |
| 1968 |
return 0; |
| 1969 |
} |
| 1970 |
|
| 1971 |
int kvm_remove_breakpoint(CPUState *cpu, target_ulong addr,
|
| 1972 |
target_ulong len, int type)
|
| 1973 |
{
|
| 1974 |
struct kvm_sw_breakpoint *bp;
|
| 1975 |
int err;
|
| 1976 |
|
| 1977 |
if (type == GDB_BREAKPOINT_SW) {
|
| 1978 |
bp = kvm_find_sw_breakpoint(cpu, addr); |
| 1979 |
if (!bp) {
|
| 1980 |
return -ENOENT;
|
| 1981 |
} |
| 1982 |
|
| 1983 |
if (bp->use_count > 1) { |
| 1984 |
bp->use_count--; |
| 1985 |
return 0; |
| 1986 |
} |
| 1987 |
|
| 1988 |
err = kvm_arch_remove_sw_breakpoint(cpu, bp); |
| 1989 |
if (err) {
|
| 1990 |
return err;
|
| 1991 |
} |
| 1992 |
|
| 1993 |
QTAILQ_REMOVE(&cpu->kvm_state->kvm_sw_breakpoints, bp, entry); |
| 1994 |
g_free(bp); |
| 1995 |
} else {
|
| 1996 |
err = kvm_arch_remove_hw_breakpoint(addr, len, type); |
| 1997 |
if (err) {
|
| 1998 |
return err;
|
| 1999 |
} |
| 2000 |
} |
| 2001 |
|
| 2002 |
CPU_FOREACH(cpu) {
|
| 2003 |
err = kvm_update_guest_debug(cpu, 0);
|
| 2004 |
if (err) {
|
| 2005 |
return err;
|
| 2006 |
} |
| 2007 |
} |
| 2008 |
return 0; |
| 2009 |
} |
| 2010 |
|
| 2011 |
void kvm_remove_all_breakpoints(CPUState *cpu)
|
| 2012 |
{
|
| 2013 |
struct kvm_sw_breakpoint *bp, *next;
|
| 2014 |
KVMState *s = cpu->kvm_state; |
| 2015 |
|
| 2016 |
QTAILQ_FOREACH_SAFE(bp, &s->kvm_sw_breakpoints, entry, next) {
|
| 2017 |
if (kvm_arch_remove_sw_breakpoint(cpu, bp) != 0) { |
| 2018 |
/* Try harder to find a CPU that currently sees the breakpoint. */
|
| 2019 |
CPU_FOREACH(cpu) {
|
| 2020 |
if (kvm_arch_remove_sw_breakpoint(cpu, bp) == 0) { |
| 2021 |
break;
|
| 2022 |
} |
| 2023 |
} |
| 2024 |
} |
| 2025 |
QTAILQ_REMOVE(&s->kvm_sw_breakpoints, bp, entry); |
| 2026 |
g_free(bp); |
| 2027 |
} |
| 2028 |
kvm_arch_remove_all_hw_breakpoints(); |
| 2029 |
|
| 2030 |
CPU_FOREACH(cpu) {
|
| 2031 |
kvm_update_guest_debug(cpu, 0);
|
| 2032 |
} |
| 2033 |
} |
| 2034 |
|
| 2035 |
#else /* !KVM_CAP_SET_GUEST_DEBUG */ |
| 2036 |
|
| 2037 |
int kvm_update_guest_debug(CPUState *cpu, unsigned long reinject_trap) |
| 2038 |
{
|
| 2039 |
return -EINVAL;
|
| 2040 |
} |
| 2041 |
|
| 2042 |
int kvm_insert_breakpoint(CPUState *cpu, target_ulong addr,
|
| 2043 |
target_ulong len, int type)
|
| 2044 |
{
|
| 2045 |
return -EINVAL;
|
| 2046 |
} |
| 2047 |
|
| 2048 |
int kvm_remove_breakpoint(CPUState *cpu, target_ulong addr,
|
| 2049 |
target_ulong len, int type)
|
| 2050 |
{
|
| 2051 |
return -EINVAL;
|
| 2052 |
} |
| 2053 |
|
| 2054 |
void kvm_remove_all_breakpoints(CPUState *cpu)
|
| 2055 |
{
|
| 2056 |
} |
| 2057 |
#endif /* !KVM_CAP_SET_GUEST_DEBUG */ |
| 2058 |
|
| 2059 |
int kvm_set_signal_mask(CPUState *cpu, const sigset_t *sigset) |
| 2060 |
{
|
| 2061 |
struct kvm_signal_mask *sigmask;
|
| 2062 |
int r;
|
| 2063 |
|
| 2064 |
if (!sigset) {
|
| 2065 |
return kvm_vcpu_ioctl(cpu, KVM_SET_SIGNAL_MASK, NULL); |
| 2066 |
} |
| 2067 |
|
| 2068 |
sigmask = g_malloc(sizeof(*sigmask) + sizeof(*sigset)); |
| 2069 |
|
| 2070 |
sigmask->len = 8;
|
| 2071 |
memcpy(sigmask->sigset, sigset, sizeof(*sigset));
|
| 2072 |
r = kvm_vcpu_ioctl(cpu, KVM_SET_SIGNAL_MASK, sigmask); |
| 2073 |
g_free(sigmask); |
| 2074 |
|
| 2075 |
return r;
|
| 2076 |
} |
| 2077 |
int kvm_on_sigbus_vcpu(CPUState *cpu, int code, void *addr) |
| 2078 |
{
|
| 2079 |
return kvm_arch_on_sigbus_vcpu(cpu, code, addr);
|
| 2080 |
} |
| 2081 |
|
| 2082 |
int kvm_on_sigbus(int code, void *addr) |
| 2083 |
{
|
| 2084 |
return kvm_arch_on_sigbus(code, addr);
|
| 2085 |
} |
| 2086 |
|
| 2087 |
int kvm_create_device(KVMState *s, uint64_t type, bool test) |
| 2088 |
{
|
| 2089 |
int ret;
|
| 2090 |
struct kvm_create_device create_dev;
|
| 2091 |
|
| 2092 |
create_dev.type = type; |
| 2093 |
create_dev.fd = -1;
|
| 2094 |
create_dev.flags = test ? KVM_CREATE_DEVICE_TEST : 0;
|
| 2095 |
|
| 2096 |
if (!kvm_check_extension(s, KVM_CAP_DEVICE_CTRL)) {
|
| 2097 |
return -ENOTSUP;
|
| 2098 |
} |
| 2099 |
|
| 2100 |
ret = kvm_vm_ioctl(s, KVM_CREATE_DEVICE, &create_dev); |
| 2101 |
if (ret) {
|
| 2102 |
return ret;
|
| 2103 |
} |
| 2104 |
|
| 2105 |
return test ? 0 : create_dev.fd; |
| 2106 |
} |