#include "qemu-common.h"
#include "qemu-barrier.h"
+#include "qemu-option.h"
+#include "qemu-config.h"
#include "sysemu.h"
#include "hw/hw.h"
#include "hw/msi.h"
#include "bswap.h"
#include "memory.h"
#include "exec-memory.h"
+#include "event_notifier.h"
/* This check must be after config-host.h is included */
#ifdef CONFIG_EVENTFD
#include <sys/eventfd.h>
#endif
+#ifdef CONFIG_VALGRIND_H
+#include <valgrind/memcheck.h>
+#endif
+
/* KVM uses PAGE_SIZE in its definition of COALESCED_MMIO_MAX */
#define PAGE_SIZE TARGET_PAGE_SIZE
int pit_state2;
int xsave, xcrs;
int many_ioeventfds;
+ int intx_set_mask;
/* The man page (and posix) say ioctl numbers are signed int, but
* they're not. Linux, glibc and *BSD all treat ioctl numbers as
* unsigned, and treating them as signed here can break things */
- unsigned irqchip_inject_ioctl;
+ unsigned irq_set_ioctl;
#ifdef KVM_CAP_IRQ_ROUTING
struct kvm_irq_routing *irq_routes;
int nr_allocated_irq_routes;
KVMState *kvm_state;
bool kvm_kernel_irqchip;
+bool kvm_async_interrupts_allowed;
+bool kvm_irqfds_allowed;
+bool kvm_msi_via_irqfd_allowed;
+bool kvm_gsi_routing_allowed;
static const KVMCapabilityInfo kvm_required_capabilites[] = {
KVM_CAP_INFO(USER_MEMORY),
return ret;
}
-int kvm_coalesce_mmio_region(target_phys_addr_t start, ram_addr_t size)
+static void kvm_coalesce_mmio_region(MemoryListener *listener,
+ MemoryRegionSection *secion,
+ target_phys_addr_t start, target_phys_addr_t size)
{
- int ret = -ENOSYS;
KVMState *s = kvm_state;
if (s->coalesced_mmio) {
zone.size = size;
zone.pad = 0;
- ret = kvm_vm_ioctl(s, KVM_REGISTER_COALESCED_MMIO, &zone);
+ (void)kvm_vm_ioctl(s, KVM_REGISTER_COALESCED_MMIO, &zone);
}
-
- return ret;
}
-int kvm_uncoalesce_mmio_region(target_phys_addr_t start, ram_addr_t size)
+static void kvm_uncoalesce_mmio_region(MemoryListener *listener,
+ MemoryRegionSection *secion,
+ target_phys_addr_t start, target_phys_addr_t size)
{
- int ret = -ENOSYS;
KVMState *s = kvm_state;
if (s->coalesced_mmio) {
zone.size = size;
zone.pad = 0;
- ret = kvm_vm_ioctl(s, KVM_UNREGISTER_COALESCED_MMIO, &zone);
+ (void)kvm_vm_ioctl(s, KVM_UNREGISTER_COALESCED_MMIO, &zone);
}
-
- return ret;
}
int kvm_check_extension(KVMState *s, unsigned int extension)
}
}
-static void kvm_begin(MemoryListener *listener)
-{
-}
-
-static void kvm_commit(MemoryListener *listener)
-{
-}
-
static void kvm_region_add(MemoryListener *listener,
MemoryRegionSection *section)
{
kvm_set_phys_mem(section, false);
}
-static void kvm_region_nop(MemoryListener *listener,
- MemoryRegionSection *section)
-{
-}
-
static void kvm_log_sync(MemoryListener *listener,
MemoryRegionSection *section)
{
assert(r >= 0);
}
-static void kvm_mem_ioeventfd_add(MemoryRegionSection *section,
- bool match_data, uint64_t data, int fd)
+static void kvm_mem_ioeventfd_add(MemoryListener *listener,
+ MemoryRegionSection *section,
+ bool match_data, uint64_t data,
+ EventNotifier *e)
{
+ int fd = event_notifier_get_fd(e);
int r;
assert(match_data && section->size <= 8);
}
}
-static void kvm_mem_ioeventfd_del(MemoryRegionSection *section,
- bool match_data, uint64_t data, int fd)
+static void kvm_mem_ioeventfd_del(MemoryListener *listener,
+ MemoryRegionSection *section,
+ bool match_data, uint64_t data,
+ EventNotifier *e)
{
+ int fd = event_notifier_get_fd(e);
int r;
r = kvm_set_ioeventfd_mmio(fd, section->offset_within_address_space,
}
}
-static void kvm_io_ioeventfd_add(MemoryRegionSection *section,
- bool match_data, uint64_t data, int fd)
+static void kvm_io_ioeventfd_add(MemoryListener *listener,
+ MemoryRegionSection *section,
+ bool match_data, uint64_t data,
+ EventNotifier *e)
{
+ int fd = event_notifier_get_fd(e);
int r;
assert(match_data && section->size == 2);
}
}
-static void kvm_io_ioeventfd_del(MemoryRegionSection *section,
- bool match_data, uint64_t data, int fd)
+static void kvm_io_ioeventfd_del(MemoryListener *listener,
+ MemoryRegionSection *section,
+ bool match_data, uint64_t data,
+ EventNotifier *e)
{
+ int fd = event_notifier_get_fd(e);
int r;
r = kvm_set_ioeventfd_pio_word(fd, section->offset_within_address_space,
}
}
-static void kvm_eventfd_add(MemoryListener *listener,
- MemoryRegionSection *section,
- bool match_data, uint64_t data, int fd)
-{
- if (section->address_space == get_system_memory()) {
- kvm_mem_ioeventfd_add(section, match_data, data, fd);
- } else {
- kvm_io_ioeventfd_add(section, match_data, data, fd);
- }
-}
-
-static void kvm_eventfd_del(MemoryListener *listener,
- MemoryRegionSection *section,
- bool match_data, uint64_t data, int fd)
-{
- if (section->address_space == get_system_memory()) {
- kvm_mem_ioeventfd_del(section, match_data, data, fd);
- } else {
- kvm_io_ioeventfd_del(section, match_data, data, fd);
- }
-}
-
static MemoryListener kvm_memory_listener = {
- .begin = kvm_begin,
- .commit = kvm_commit,
.region_add = kvm_region_add,
.region_del = kvm_region_del,
- .region_nop = kvm_region_nop,
.log_start = kvm_log_start,
.log_stop = kvm_log_stop,
.log_sync = kvm_log_sync,
.log_global_start = kvm_log_global_start,
.log_global_stop = kvm_log_global_stop,
- .eventfd_add = kvm_eventfd_add,
- .eventfd_del = kvm_eventfd_del,
+ .eventfd_add = kvm_mem_ioeventfd_add,
+ .eventfd_del = kvm_mem_ioeventfd_del,
+ .coalesced_mmio_add = kvm_coalesce_mmio_region,
+ .coalesced_mmio_del = kvm_uncoalesce_mmio_region,
+ .priority = 10,
+};
+
+static MemoryListener kvm_io_listener = {
+ .eventfd_add = kvm_io_ioeventfd_add,
+ .eventfd_del = kvm_io_ioeventfd_del,
.priority = 10,
};
}
}
-int kvm_irqchip_set_irq(KVMState *s, int irq, int level)
+int kvm_set_irq(KVMState *s, int irq, int level)
{
struct kvm_irq_level event;
int ret;
- assert(kvm_irqchip_in_kernel());
+ assert(kvm_async_interrupts_enabled());
event.level = level;
event.irq = irq;
- ret = kvm_vm_ioctl(s, s->irqchip_inject_ioctl, &event);
+ ret = kvm_vm_ioctl(s, s->irq_set_ioctl, &event);
if (ret < 0) {
- perror("kvm_set_irqchip_line");
+ perror("kvm_set_irq");
abort();
}
- return (s->irqchip_inject_ioctl == KVM_IRQ_LINE) ? 1 : event.status;
+ return (s->irq_set_ioctl == KVM_IRQ_LINE) ? 1 : event.status;
}
#ifdef KVM_CAP_IRQ_ROUTING
kvm_irqchip_commit_routes(s);
}
+static int kvm_update_routing_entry(KVMState *s,
+ struct kvm_irq_routing_entry *new_entry)
+{
+ struct kvm_irq_routing_entry *entry;
+ int n;
+
+ for (n = 0; n < s->irq_routes->nr; n++) {
+ entry = &s->irq_routes->entries[n];
+ if (entry->gsi != new_entry->gsi) {
+ continue;
+ }
+
+ entry->type = new_entry->type;
+ entry->flags = new_entry->flags;
+ entry->u = new_entry->u;
+
+ kvm_irqchip_commit_routes(s);
+
+ return 0;
+ }
+
+ return -ESRCH;
+}
+
void kvm_irqchip_add_irq_route(KVMState *s, int irq, int irqchip, int pin)
{
struct kvm_irq_routing_entry e;
assert(route->kroute.type == KVM_IRQ_ROUTING_MSI);
- return kvm_irqchip_set_irq(s, route->kroute.gsi, 1);
+ return kvm_set_irq(s, route->kroute.gsi, 1);
}
int kvm_irqchip_add_msi_route(KVMState *s, MSIMessage msg)
struct kvm_irq_routing_entry kroute;
int virq;
- if (!kvm_irqchip_in_kernel()) {
+ if (!kvm_gsi_routing_enabled()) {
return -ENOSYS;
}
return virq;
}
+int kvm_irqchip_update_msi_route(KVMState *s, int virq, MSIMessage msg)
+{
+ struct kvm_irq_routing_entry kroute;
+
+ if (!kvm_irqchip_in_kernel()) {
+ return -ENOSYS;
+ }
+
+ kroute.gsi = virq;
+ kroute.type = KVM_IRQ_ROUTING_MSI;
+ kroute.flags = 0;
+ kroute.u.msi.address_lo = (uint32_t)msg.address;
+ kroute.u.msi.address_hi = msg.address >> 32;
+ kroute.u.msi.data = msg.data;
+
+ return kvm_update_routing_entry(s, &kroute);
+}
+
static int kvm_irqchip_assign_irqfd(KVMState *s, int fd, int virq, bool assign)
{
struct kvm_irqfd irqfd = {
.flags = assign ? 0 : KVM_IRQFD_FLAG_DEASSIGN,
};
- if (!kvm_irqchip_in_kernel()) {
+ if (!kvm_irqfds_enabled()) {
return -ENOSYS;
}
int kvm_irqchip_add_msi_route(KVMState *s, MSIMessage msg)
{
- abort();
+ return -ENOSYS;
}
static int kvm_irqchip_assign_irqfd(KVMState *s, int fd, int virq, bool assign)
}
#endif /* !KVM_CAP_IRQ_ROUTING */
-int kvm_irqchip_add_irqfd(KVMState *s, int fd, int virq)
+int kvm_irqchip_add_irqfd_notifier(KVMState *s, EventNotifier *n, int virq)
{
- return kvm_irqchip_assign_irqfd(s, fd, virq, true);
+ return kvm_irqchip_assign_irqfd(s, event_notifier_get_fd(n), virq, true);
}
-int kvm_irqchip_remove_irqfd(KVMState *s, int fd, int virq)
+int kvm_irqchip_remove_irqfd_notifier(KVMState *s, EventNotifier *n, int virq)
{
- return kvm_irqchip_assign_irqfd(s, fd, virq, false);
+ return kvm_irqchip_assign_irqfd(s, event_notifier_get_fd(n), virq, false);
}
static int kvm_irqchip_create(KVMState *s)
return ret;
}
- s->irqchip_inject_ioctl = KVM_IRQ_LINE;
- if (kvm_check_extension(s, KVM_CAP_IRQ_INJECT_STATUS)) {
- s->irqchip_inject_ioctl = KVM_IRQ_LINE_STATUS;
- }
kvm_kernel_irqchip = true;
+ /* If we have an in-kernel IRQ chip then we must have asynchronous
+ * interrupt delivery (though the reverse is not necessarily true)
+ */
+ kvm_async_interrupts_allowed = true;
kvm_init_irq_routing(s);
return 0;
}
+static int kvm_max_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;
+ }
+
+ return 4;
+}
+
int kvm_init(void)
{
static const char upgrade_note[] =
const KVMCapabilityInfo *missing_cap;
int ret;
int i;
+ int max_vcpus;
s = g_malloc0(sizeof(KVMState));
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->vmfd = kvm_ioctl(s, KVM_CREATE_VM, 0);
if (s->vmfd < 0) {
#ifdef TARGET_S390X
s->direct_msi = (kvm_check_extension(s, KVM_CAP_SIGNAL_MSI) > 0);
#endif
+ s->intx_set_mask = kvm_check_extension(s, KVM_CAP_PCI_2_3);
+
+ s->irq_set_ioctl = KVM_IRQ_LINE;
+ if (kvm_check_extension(s, KVM_CAP_IRQ_INJECT_STATUS)) {
+ s->irq_set_ioctl = KVM_IRQ_LINE_STATUS;
+ }
+
ret = kvm_arch_init(s);
if (ret < 0) {
goto err;
}
kvm_state = s;
- memory_listener_register(&kvm_memory_listener, NULL);
+ memory_listener_register(&kvm_memory_listener, &address_space_memory);
+ memory_listener_register(&kvm_io_listener, &address_space_io);
s->many_ioeventfds = kvm_check_many_ioeventfds();
return 0;
err:
- if (s) {
- if (s->vmfd >= 0) {
- close(s->vmfd);
- }
- if (s->fd != -1) {
- close(s->fd);
- }
+ if (s->vmfd >= 0) {
+ close(s->vmfd);
+ }
+ if (s->fd != -1) {
+ close(s->fd);
}
g_free(s);
qemu_mutex_lock_iothread();
kvm_arch_post_run(env, run);
- kvm_flush_coalesced_mmio_buffer();
-
if (run_ret < 0) {
if (run_ret == -EINTR || run_ret == -EAGAIN) {
DPRINTF("io window exit\n");
#endif
}
-int kvm_allows_irq0_override(void)
+int kvm_has_intx_set_mask(void)
{
- return !kvm_irqchip_in_kernel() || kvm_has_gsi_routing();
+ return kvm_state->intx_set_mask;
+}
+
+void *kvm_vmalloc(ram_addr_t size)
+{
+#ifdef TARGET_S390X
+ void *mem;
+
+ mem = kvm_arch_vmalloc(size);
+ if (mem) {
+ return mem;
+ }
+#endif
+ return qemu_vmalloc(size);
}
void kvm_setup_guest_memory(void *start, size_t size)
{
+#ifdef CONFIG_VALGRIND_H
+ VALGRIND_MAKE_MEM_DEFINED(start, size);
+#endif
if (!kvm_has_sync_mmu()) {
int ret = qemu_madvise(start, size, QEMU_MADV_DONTFORK);
projects / qemu.git / blobdiff