#include "sysemu/kvm.h"
#include "qemu/bswap.h"
#include "exec/memory.h"
+#include "exec/ram_addr.h"
#include "exec/address-spaces.h"
#include "qemu/event_notifier.h"
#include "trace.h"
struct KVMState
{
- KVMSlot slots[32];
+ KVMSlot *slots;
+ int nr_slots;
int fd;
int vmfd;
int coalesced_mmio;
bool kvm_irqfds_allowed;
bool kvm_msi_via_irqfd_allowed;
bool kvm_gsi_routing_allowed;
+bool kvm_gsi_direct_mapping;
bool kvm_allowed;
bool kvm_readonly_mem_allowed;
{
int i;
- for (i = 0; i < ARRAY_SIZE(s->slots); i++) {
+ for (i = 0; i < s->nr_slots; i++) {
if (s->slots[i].memory_size == 0) {
return &s->slots[i];
}
{
int i;
- for (i = 0; i < ARRAY_SIZE(s->slots); i++) {
+ for (i = 0; i < s->nr_slots; i++) {
KVMSlot *mem = &s->slots[i];
if (start_addr == mem->start_addr &&
KVMSlot *found = NULL;
int i;
- for (i = 0; i < ARRAY_SIZE(s->slots); i++) {
+ for (i = 0; i < s->nr_slots; i++) {
KVMSlot *mem = &s->slots[i];
if (mem->memory_size == 0 ||
{
int i;
- for (i = 0; i < ARRAY_SIZE(s->slots); i++) {
+ for (i = 0; i < s->nr_slots; i++) {
KVMSlot *mem = &s->slots[i];
if (ram >= mem->ram && ram < mem->ram + mem->memory_size) {
s->migration_log = enable;
- for (i = 0; i < ARRAY_SIZE(s->slots); i++) {
+ for (i = 0; i < s->nr_slots; i++) {
mem = &s->slots[i];
if (!mem->memory_size) {
static int kvm_get_dirty_pages_log_range(MemoryRegionSection *section,
unsigned long *bitmap)
{
- unsigned int i, j;
- unsigned long page_number, c;
- hwaddr addr, addr1;
- unsigned int pages = int128_get64(section->size) / getpagesize();
- unsigned int len = (pages + HOST_LONG_BITS - 1) / HOST_LONG_BITS;
- unsigned long hpratio = getpagesize() / TARGET_PAGE_SIZE;
+ ram_addr_t start = section->offset_within_region + section->mr->ram_addr;
+ ram_addr_t pages = int128_get64(section->size) / getpagesize();
- /*
- * bitmap-traveling is faster than memory-traveling (for addr...)
- * especially when most of the memory is not dirty.
- */
- for (i = 0; i < len; i++) {
- if (bitmap[i] != 0) {
- c = leul_to_cpu(bitmap[i]);
- do {
- j = ffsl(c) - 1;
- c &= ~(1ul << j);
- page_number = (i * HOST_LONG_BITS + j) * hpratio;
- addr1 = page_number * TARGET_PAGE_SIZE;
- addr = section->offset_within_region + addr1;
- memory_region_set_dirty(section->mr, addr,
- TARGET_PAGE_SIZE * hpratio);
- } while (c != 0);
- }
- }
+ cpu_physical_memory_set_dirty_lebitmap(bitmap, start, pages);
return 0;
}
return ret;
}
-static int kvm_set_ioeventfd_mmio(int fd, uint32_t addr, uint32_t val,
+static int kvm_set_ioeventfd_mmio(int fd, hwaddr addr, uint32_t val,
bool assign, uint32_t size, bool datamatch)
{
int ret;
struct kvm_irq_routing_entry *e;
int i;
+ if (kvm_gsi_direct_mapping()) {
+ return;
+ }
+
for (i = 0; i < s->irq_routes->nr; i++) {
e = &s->irq_routes->entries[i];
if (e->gsi == virq) {
struct kvm_irq_routing_entry kroute = {};
int virq;
+ if (kvm_gsi_direct_mapping()) {
+ return msg.data & 0xffff;
+ }
+
if (!kvm_gsi_routing_enabled()) {
return -ENOSYS;
}
{
struct kvm_irq_routing_entry kroute = {};
+ if (kvm_gsi_direct_mapping()) {
+ return 0;
+ }
+
if (!kvm_irqchip_in_kernel()) {
return -ENOSYS;
}
return 0;
}
- ret = kvm_vm_ioctl(s, KVM_CREATE_IRQCHIP);
+ /* First probe and see if there's a arch-specific hook to create the
+ * in-kernel irqchip for us */
+ ret = kvm_arch_irqchip_create(s);
if (ret < 0) {
- fprintf(stderr, "Create kernel irqchip failed\n");
return ret;
+ } else if (ret == 0) {
+ ret = kvm_vm_ioctl(s, KVM_CREATE_IRQCHIP);
+ if (ret < 0) {
+ fprintf(stderr, "Create kernel irqchip failed\n");
+ return ret;
+ }
}
kvm_kernel_irqchip = true;
return 0;
}
-static int kvm_max_vcpus(KVMState *s)
+/* Find number of supported CPUs using the recommended
+ * procedure from the kernel API documentation to cope with
+ * older kernels that may be missing capabilities.
+ */
+static int kvm_recommended_vcpus(KVMState *s)
{
- int ret;
-
- /* Find number of supported CPUs using the recommended
- * procedure from the kernel API documentation to cope with
- * older kernels that may be missing capabilities.
- */
- ret = kvm_check_extension(s, KVM_CAP_MAX_VCPUS);
- if (ret) {
- return ret;
- }
- ret = kvm_check_extension(s, KVM_CAP_NR_VCPUS);
- if (ret) {
- return ret;
- }
+ int ret = kvm_check_extension(s, KVM_CAP_NR_VCPUS);
+ return (ret) ? ret : 4;
+}
- return 4;
+static int kvm_max_vcpus(KVMState *s)
+{
+ int ret = kvm_check_extension(s, KVM_CAP_MAX_VCPUS);
+ return (ret) ? ret : kvm_recommended_vcpus(s);
}
int kvm_init(void)
static const char upgrade_note[] =
"Please upgrade to at least kernel 2.6.29 or recent kvm-kmod\n"
"(see http://sourceforge.net/projects/kvm).\n";
+ struct {
+ const char *name;
+ int num;
+ } num_cpus[] = {
+ { "SMP", smp_cpus },
+ { "hotpluggable", max_cpus },
+ { NULL, }
+ }, *nc = num_cpus;
+ int soft_vcpus_limit, hard_vcpus_limit;
KVMState *s;
const KVMCapabilityInfo *missing_cap;
int ret;
int i;
- int max_vcpus;
s = g_malloc0(sizeof(KVMState));
* page size for the system though.
*/
assert(TARGET_PAGE_SIZE <= getpagesize());
+ page_size_init();
#ifdef KVM_CAP_SET_GUEST_DEBUG
QTAILQ_INIT(&s->kvm_sw_breakpoints);
#endif
- for (i = 0; i < ARRAY_SIZE(s->slots); i++) {
- s->slots[i].slot = i;
- }
s->vmfd = -1;
s->fd = qemu_open("/dev/kvm", O_RDWR);
if (s->fd == -1) {
goto err;
}
- max_vcpus = kvm_max_vcpus(s);
- if (smp_cpus > max_vcpus) {
- ret = -EINVAL;
- fprintf(stderr, "Number of SMP cpus requested (%d) exceeds max cpus "
- "supported by KVM (%d)\n", smp_cpus, max_vcpus);
- goto err;
+ s->nr_slots = kvm_check_extension(s, KVM_CAP_NR_MEMSLOTS);
+
+ /* If unspecified, use the default value */
+ if (!s->nr_slots) {
+ s->nr_slots = 32;
}
- if (max_cpus > max_vcpus) {
- ret = -EINVAL;
- fprintf(stderr, "Number of hotpluggable cpus requested (%d) exceeds max cpus "
- "supported by KVM (%d)\n", max_cpus, max_vcpus);
- goto err;
+ s->slots = g_malloc0(s->nr_slots * sizeof(KVMSlot));
+
+ for (i = 0; i < s->nr_slots; i++) {
+ s->slots[i].slot = i;
+ }
+
+ /* check the vcpu limits */
+ soft_vcpus_limit = kvm_recommended_vcpus(s);
+ hard_vcpus_limit = kvm_max_vcpus(s);
+
+ while (nc->name) {
+ if (nc->num > soft_vcpus_limit) {
+ fprintf(stderr,
+ "Warning: Number of %s cpus requested (%d) exceeds "
+ "the recommended cpus supported by KVM (%d)\n",
+ nc->name, nc->num, soft_vcpus_limit);
+
+ if (nc->num > hard_vcpus_limit) {
+ ret = -EINVAL;
+ fprintf(stderr, "Number of %s cpus requested (%d) exceeds "
+ "the maximum cpus supported by KVM (%d)\n",
+ nc->name, nc->num, hard_vcpus_limit);
+ goto err;
+ }
+ }
+ nc++;
}
- s->vmfd = kvm_ioctl(s, KVM_CREATE_VM, 0);
- if (s->vmfd < 0) {
+ do {
+ ret = kvm_ioctl(s, KVM_CREATE_VM, 0);
+ } while (ret == -EINTR);
+
+ if (ret < 0) {
+ fprintf(stderr, "ioctl(KVM_CREATE_VM) failed: %d %s\n", -ret,
+ strerror(-ret));
+
#ifdef TARGET_S390X
fprintf(stderr, "Please add the 'switch_amode' kernel parameter to "
"your host kernel command line\n");
#endif
- ret = s->vmfd;
goto err;
}
+ s->vmfd = ret;
missing_cap = kvm_check_extension_list(s, kvm_required_capabilites);
if (!missing_cap) {
missing_cap =
if (s->fd != -1) {
close(s->fd);
}
+ g_free(s->slots);
g_free(s);
return ret;
static int kvm_handle_internal_error(CPUState *cpu, struct kvm_run *run)
{
- fprintf(stderr, "KVM internal error.");
+ fprintf(stderr, "KVM internal error. Suberror: %d\n",
+ run->internal.suberror);
+
if (kvm_check_extension(kvm_state, KVM_CAP_INTERNAL_ERROR_DATA)) {
int i;
- fprintf(stderr, " Suberror: %d\n", run->internal.suberror);
for (i = 0; i < run->internal.ndata; ++i) {
fprintf(stderr, "extra data[%d]: %"PRIx64"\n",
i, (uint64_t)run->internal.data[i]);
}
- } else {
- fprintf(stderr, "\n");
}
if (run->internal.suberror == KVM_INTERNAL_ERROR_EMULATION) {
fprintf(stderr, "emulation failure\n");
return ret;
}
+int kvm_device_ioctl(int fd, int type, ...)
+{
+ int ret;
+ void *arg;
+ va_list ap;
+
+ va_start(ap, type);
+ arg = va_arg(ap, void *);
+ va_end(ap);
+
+ trace_kvm_device_ioctl(fd, type, arg);
+ ret = ioctl(fd, type, arg);
+ if (ret == -1) {
+ ret = -errno;
+ }
+ return ret;
+}
+
int kvm_has_sync_mmu(void)
{
return kvm_check_extension(kvm_state, KVM_CAP_SYNC_MMU);
{
return kvm_arch_on_sigbus(code, addr);
}
+
+int kvm_create_device(KVMState *s, uint64_t type, bool test)
+{
+ int ret;
+ struct kvm_create_device create_dev;
+
+ create_dev.type = type;
+ create_dev.fd = -1;
+ create_dev.flags = test ? KVM_CREATE_DEVICE_TEST : 0;
+
+ if (!kvm_check_extension(s, KVM_CAP_DEVICE_CTRL)) {
+ return -ENOTSUP;
+ }
+
+ ret = kvm_vm_ioctl(s, KVM_CREATE_DEVICE, &create_dev);
+ if (ret) {
+ return ret;
+ }
+
+ return test ? 0 : create_dev.fd;
+}
projects / qemu.git / blobdiff