#include <linux/kvm.h>
-#include "qemu-common.h"
#include "qemu/atomic.h"
#include "qemu/option.h"
#include "qemu/config-file.h"
#include "qemu/error-report.h"
#include "qapi/error.h"
-#include "hw/hw.h"
#include "hw/pci/msi.h"
#include "hw/pci/msix.h"
#include "hw/s390x/adapter.h"
#include "exec/gdbstub.h"
#include "sysemu/kvm_int.h"
+#include "sysemu/runstate.h"
#include "sysemu/cpus.h"
+#include "sysemu/sysemu.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 "qemu/main-loop.h"
#include "trace.h"
#include "hw/irq.h"
#include "sysemu/sev.h"
#include "sysemu/balloon.h"
+#include "qapi/visitor.h"
+#include "qapi/qapi-types-common.h"
+#include "qapi/qapi-visit-common.h"
#include "hw/boards.h"
/* KVM uses PAGE_SIZE in its definition of KVM_COALESCED_MMIO_MAX. We
* need to use the real host PAGE_SIZE, as that's what KVM will use.
*/
-#define PAGE_SIZE getpagesize()
+#define PAGE_SIZE qemu_real_host_page_size
//#define DEBUG_KVM
#ifdef KVM_CAP_SET_GUEST_DEBUG
QTAILQ_HEAD(, kvm_sw_breakpoint) kvm_sw_breakpoints;
#endif
+ int max_nested_state_len;
int many_ioeventfds;
int intx_set_mask;
+ int kvm_shadow_mem;
+ bool kernel_irqchip_allowed;
+ bool kernel_irqchip_required;
+ OnOffAuto kernel_irqchip_split;
bool sync_mmu;
+ bool manual_dirty_log_protect;
/* 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 */
/* memory encryption */
void *memcrypt_handle;
int (*memcrypt_encrypt_data)(void *handle, uint8_t *ptr, uint64_t len);
+
+ /* For "info mtree -f" to tell if an MR is registered in KVM */
+ int nr_as;
+ struct KVMAs {
+ KVMMemoryListener *ml;
+ AddressSpace *as;
+ } *as;
};
KVMState *kvm_state;
bool kvm_ioeventfd_any_length_allowed;
bool kvm_msi_use_devid;
static bool kvm_immediate_exit;
+static hwaddr kvm_max_slot_size = ~0;
static const KVMCapabilityInfo kvm_required_capabilites[] = {
KVM_CAP_INFO(USER_MEMORY),
KVM_CAP_LAST_INFO
};
+static NotifierList kvm_irqchip_change_notifiers =
+ NOTIFIER_LIST_INITIALIZER(kvm_irqchip_change_notifiers);
+
+#define kvm_slots_lock(kml) qemu_mutex_lock(&(kml)->slots_lock)
+#define kvm_slots_unlock(kml) qemu_mutex_unlock(&(kml)->slots_lock)
+
int kvm_get_max_memslots(void)
{
- KVMState *s = KVM_STATE(current_machine->accelerator);
+ KVMState *s = KVM_STATE(current_accel());
return s->nr_slots;
}
return 1;
}
+/* Called with KVMMemoryListener.slots_lock held */
static KVMSlot *kvm_get_free_slot(KVMMemoryListener *kml)
{
KVMState *s = kvm_state;
bool kvm_has_free_slot(MachineState *ms)
{
KVMState *s = KVM_STATE(ms->accelerator);
+ bool result;
+ KVMMemoryListener *kml = &s->memory_listener;
- return kvm_get_free_slot(&s->memory_listener);
+ kvm_slots_lock(kml);
+ result = !!kvm_get_free_slot(kml);
+ kvm_slots_unlock(kml);
+
+ return result;
}
+/* Called with KVMMemoryListener.slots_lock held */
static KVMSlot *kvm_alloc_slot(KVMMemoryListener *kml)
{
KVMSlot *slot = kvm_get_free_slot(kml);
hwaddr *phys_addr)
{
KVMMemoryListener *kml = &s->memory_listener;
- int i;
+ int i, ret = 0;
+ kvm_slots_lock(kml);
for (i = 0; i < s->nr_slots; i++) {
KVMSlot *mem = &kml->slots[i];
if (ram >= mem->ram && ram < mem->ram + mem->memory_size) {
*phys_addr = mem->start_addr + (ram - mem->ram);
- return 1;
+ ret = 1;
+ break;
}
}
+ kvm_slots_unlock(kml);
- return 0;
+ return ret;
}
static int kvm_set_user_memory_region(KVMMemoryListener *kml, KVMSlot *slot, bool new)
/* Set the slot size to 0 before setting the slot to the desired
* value. This is needed based on KVM commit 75d61fbc. */
mem.memory_size = 0;
- kvm_vm_ioctl(s, KVM_SET_USER_MEMORY_REGION, &mem);
+ ret = kvm_vm_ioctl(s, KVM_SET_USER_MEMORY_REGION, &mem);
+ if (ret < 0) {
+ goto err;
+ }
}
mem.memory_size = slot->memory_size;
ret = kvm_vm_ioctl(s, KVM_SET_USER_MEMORY_REGION, &mem);
slot->old_flags = mem.flags;
+err:
trace_kvm_set_user_memory(mem.slot, mem.flags, mem.guest_phys_addr,
mem.memory_size, mem.userspace_addr, ret);
+ if (ret < 0) {
+ error_report("%s: KVM_SET_USER_MEMORY_REGION failed, slot=%d,"
+ " start=0x%" PRIx64 ", size=0x%" PRIx64 ": %s",
+ __func__, mem.slot, slot->start_addr,
+ (uint64_t)mem.memory_size, strerror(errno));
+ }
return ret;
}
DPRINTF("kvm_destroy_vcpu\n");
+ ret = kvm_arch_destroy_vcpu(cpu);
+ if (ret < 0) {
+ goto err;
+ }
+
mmap_size = kvm_ioctl(s, KVM_GET_VCPU_MMAP_SIZE, 0);
if (mmap_size < 0) {
ret = mmap_size;
return flags;
}
+/* Called with KVMMemoryListener.slots_lock held */
static int kvm_slot_update_flags(KVMMemoryListener *kml, KVMSlot *mem,
MemoryRegion *mr)
{
static int kvm_section_update_flags(KVMMemoryListener *kml,
MemoryRegionSection *section)
{
- hwaddr start_addr, size;
+ hwaddr start_addr, size, slot_size;
KVMSlot *mem;
+ int ret = 0;
size = kvm_align_section(section, &start_addr);
if (!size) {
return 0;
}
- mem = kvm_lookup_matching_slot(kml, start_addr, size);
- if (!mem) {
- /* We don't have a slot if we want to trap every access. */
- return 0;
+ kvm_slots_lock(kml);
+
+ while (size && !ret) {
+ slot_size = MIN(kvm_max_slot_size, size);
+ mem = kvm_lookup_matching_slot(kml, start_addr, slot_size);
+ if (!mem) {
+ /* We don't have a slot if we want to trap every access. */
+ goto out;
+ }
+
+ ret = kvm_slot_update_flags(kml, mem, section->mr);
+ start_addr += slot_size;
+ size -= slot_size;
}
- return kvm_slot_update_flags(kml, mem, section->mr);
+out:
+ kvm_slots_unlock(kml);
+ return ret;
}
static void kvm_log_start(MemoryListener *listener,
{
ram_addr_t start = section->offset_within_region +
memory_region_get_ram_addr(section->mr);
- ram_addr_t pages = int128_get64(section->size) / getpagesize();
+ ram_addr_t pages = int128_get64(section->size) / qemu_real_host_page_size;
cpu_physical_memory_set_dirty_lebitmap(bitmap, start, pages);
return 0;
#define ALIGN(x, y) (((x)+(y)-1) & ~((y)-1))
+/* Allocate the dirty bitmap for a slot */
+static void kvm_memslot_init_dirty_bitmap(KVMSlot *mem)
+{
+ /*
+ * XXX bad kernel interface alert
+ * For dirty bitmap, kernel allocates array of size aligned to
+ * bits-per-long. But for case when the kernel is 64bits and
+ * the userspace is 32bits, userspace can't align to the same
+ * bits-per-long, since sizeof(long) is different between kernel
+ * and user space. This way, userspace will provide buffer which
+ * may be 4 bytes less than the kernel will use, resulting in
+ * userspace memory corruption (which is not detectable by valgrind
+ * too, in most cases).
+ * So for now, let's align to 64 instead of HOST_LONG_BITS here, in
+ * a hope that sizeof(long) won't become >8 any time soon.
+ */
+ hwaddr bitmap_size = ALIGN(((mem->memory_size) >> TARGET_PAGE_BITS),
+ /*HOST_LONG_BITS*/ 64) / 8;
+ mem->dirty_bmap = g_malloc0(bitmap_size);
+}
+
/**
- * kvm_physical_sync_dirty_bitmap - Grab dirty bitmap from kernel space
- * This function updates qemu's dirty bitmap using
- * memory_region_set_dirty(). This means all bits are set
- * to dirty.
+ * kvm_physical_sync_dirty_bitmap - Sync dirty bitmap from kernel space
+ *
+ * This function will first try to fetch dirty bitmap from the kernel,
+ * and then updates qemu's dirty bitmap.
*
- * @start_add: start of logged region.
- * @end_addr: end of logged region.
+ * NOTE: caller must be with kml->slots_lock held.
+ *
+ * @kml: the KVM memory listener object
+ * @section: the memory section to sync the dirty bitmap with
*/
static int kvm_physical_sync_dirty_bitmap(KVMMemoryListener *kml,
MemoryRegionSection *section)
struct kvm_dirty_log d = {};
KVMSlot *mem;
hwaddr start_addr, size;
+ hwaddr slot_size, slot_offset = 0;
+ int ret = 0;
size = kvm_align_section(section, &start_addr);
- if (size) {
- mem = kvm_lookup_matching_slot(kml, start_addr, size);
+ while (size) {
+ MemoryRegionSection subsection = *section;
+
+ slot_size = MIN(kvm_max_slot_size, size);
+ mem = kvm_lookup_matching_slot(kml, start_addr, slot_size);
if (!mem) {
/* We don't have a slot if we want to trap every access. */
- return 0;
+ goto out;
}
- /* XXX bad kernel interface alert
- * For dirty bitmap, kernel allocates array of size aligned to
- * bits-per-long. But for case when the kernel is 64bits and
- * the userspace is 32bits, userspace can't align to the same
- * bits-per-long, since sizeof(long) is different between kernel
- * and user space. This way, userspace will provide buffer which
- * may be 4 bytes less than the kernel will use, resulting in
- * userspace memory corruption (which is not detectable by valgrind
- * too, in most cases).
- * So for now, let's align to 64 instead of HOST_LONG_BITS here, in
- * a hope that sizeof(long) won't become >8 any time soon.
- */
- size = ALIGN(((mem->memory_size) >> TARGET_PAGE_BITS),
- /*HOST_LONG_BITS*/ 64) / 8;
- d.dirty_bitmap = g_malloc0(size);
+ if (!mem->dirty_bmap) {
+ /* Allocate on the first log_sync, once and for all */
+ kvm_memslot_init_dirty_bitmap(mem);
+ }
+ d.dirty_bitmap = mem->dirty_bmap;
d.slot = mem->slot | (kml->as_id << 16);
if (kvm_vm_ioctl(s, KVM_GET_DIRTY_LOG, &d) == -1) {
DPRINTF("ioctl failed %d\n", errno);
- g_free(d.dirty_bitmap);
- return -1;
+ ret = -1;
+ goto out;
}
- kvm_get_dirty_pages_log_range(section, d.dirty_bitmap);
- g_free(d.dirty_bitmap);
+ subsection.offset_within_region += slot_offset;
+ subsection.size = int128_make64(slot_size);
+ kvm_get_dirty_pages_log_range(&subsection, d.dirty_bitmap);
+
+ slot_offset += slot_size;
+ start_addr += slot_size;
+ size -= slot_size;
}
+out:
+ return ret;
+}
- return 0;
+/* Alignment requirement for KVM_CLEAR_DIRTY_LOG - 64 pages */
+#define KVM_CLEAR_LOG_SHIFT 6
+#define KVM_CLEAR_LOG_ALIGN (qemu_real_host_page_size << KVM_CLEAR_LOG_SHIFT)
+#define KVM_CLEAR_LOG_MASK (-KVM_CLEAR_LOG_ALIGN)
+
+static int kvm_log_clear_one_slot(KVMSlot *mem, int as_id, uint64_t start,
+ uint64_t size)
+{
+ KVMState *s = kvm_state;
+ uint64_t end, bmap_start, start_delta, bmap_npages;
+ struct kvm_clear_dirty_log d;
+ unsigned long *bmap_clear = NULL, psize = qemu_real_host_page_size;
+ int ret;
+
+ /*
+ * We need to extend either the start or the size or both to
+ * satisfy the KVM interface requirement. Firstly, do the start
+ * page alignment on 64 host pages
+ */
+ bmap_start = start & KVM_CLEAR_LOG_MASK;
+ start_delta = start - bmap_start;
+ bmap_start /= psize;
+
+ /*
+ * The kernel interface has restriction on the size too, that either:
+ *
+ * (1) the size is 64 host pages aligned (just like the start), or
+ * (2) the size fills up until the end of the KVM memslot.
+ */
+ bmap_npages = DIV_ROUND_UP(size + start_delta, KVM_CLEAR_LOG_ALIGN)
+ << KVM_CLEAR_LOG_SHIFT;
+ end = mem->memory_size / psize;
+ if (bmap_npages > end - bmap_start) {
+ bmap_npages = end - bmap_start;
+ }
+ start_delta /= psize;
+
+ /*
+ * Prepare the bitmap to clear dirty bits. Here we must guarantee
+ * that we won't clear any unknown dirty bits otherwise we might
+ * accidentally clear some set bits which are not yet synced from
+ * the kernel into QEMU's bitmap, then we'll lose track of the
+ * guest modifications upon those pages (which can directly lead
+ * to guest data loss or panic after migration).
+ *
+ * Layout of the KVMSlot.dirty_bmap:
+ *
+ * |<-------- bmap_npages -----------..>|
+ * [1]
+ * start_delta size
+ * |----------------|-------------|------------------|------------|
+ * ^ ^ ^ ^
+ * | | | |
+ * start bmap_start (start) end
+ * of memslot of memslot
+ *
+ * [1] bmap_npages can be aligned to either 64 pages or the end of slot
+ */
+
+ assert(bmap_start % BITS_PER_LONG == 0);
+ /* We should never do log_clear before log_sync */
+ assert(mem->dirty_bmap);
+ if (start_delta) {
+ /* Slow path - we need to manipulate a temp bitmap */
+ bmap_clear = bitmap_new(bmap_npages);
+ bitmap_copy_with_src_offset(bmap_clear, mem->dirty_bmap,
+ bmap_start, start_delta + size / psize);
+ /*
+ * We need to fill the holes at start because that was not
+ * specified by the caller and we extended the bitmap only for
+ * 64 pages alignment
+ */
+ bitmap_clear(bmap_clear, 0, start_delta);
+ d.dirty_bitmap = bmap_clear;
+ } else {
+ /* Fast path - start address aligns well with BITS_PER_LONG */
+ d.dirty_bitmap = mem->dirty_bmap + BIT_WORD(bmap_start);
+ }
+
+ d.first_page = bmap_start;
+ /* It should never overflow. If it happens, say something */
+ assert(bmap_npages <= UINT32_MAX);
+ d.num_pages = bmap_npages;
+ d.slot = mem->slot | (as_id << 16);
+
+ if (kvm_vm_ioctl(s, KVM_CLEAR_DIRTY_LOG, &d) == -1) {
+ ret = -errno;
+ error_report("%s: KVM_CLEAR_DIRTY_LOG failed, slot=%d, "
+ "start=0x%"PRIx64", size=0x%"PRIx32", errno=%d",
+ __func__, d.slot, (uint64_t)d.first_page,
+ (uint32_t)d.num_pages, ret);
+ } else {
+ ret = 0;
+ trace_kvm_clear_dirty_log(d.slot, d.first_page, d.num_pages);
+ }
+
+ /*
+ * After we have updated the remote dirty bitmap, we update the
+ * cached bitmap as well for the memslot, then if another user
+ * clears the same region we know we shouldn't clear it again on
+ * the remote otherwise it's data loss as well.
+ */
+ bitmap_clear(mem->dirty_bmap, bmap_start + start_delta,
+ size / psize);
+ /* This handles the NULL case well */
+ g_free(bmap_clear);
+ return ret;
+}
+
+
+/**
+ * kvm_physical_log_clear - Clear the kernel's dirty bitmap for range
+ *
+ * NOTE: this will be a no-op if we haven't enabled manual dirty log
+ * protection in the host kernel because in that case this operation
+ * will be done within log_sync().
+ *
+ * @kml: the kvm memory listener
+ * @section: the memory range to clear dirty bitmap
+ */
+static int kvm_physical_log_clear(KVMMemoryListener *kml,
+ MemoryRegionSection *section)
+{
+ KVMState *s = kvm_state;
+ uint64_t start, size, offset, count;
+ KVMSlot *mem;
+ int ret = 0, i;
+
+ if (!s->manual_dirty_log_protect) {
+ /* No need to do explicit clear */
+ return ret;
+ }
+
+ start = section->offset_within_address_space;
+ size = int128_get64(section->size);
+
+ if (!size) {
+ /* Nothing more we can do... */
+ return ret;
+ }
+
+ kvm_slots_lock(kml);
+
+ for (i = 0; i < s->nr_slots; i++) {
+ mem = &kml->slots[i];
+ /* Discard slots that are empty or do not overlap the section */
+ if (!mem->memory_size ||
+ mem->start_addr > start + size - 1 ||
+ start > mem->start_addr + mem->memory_size - 1) {
+ continue;
+ }
+
+ if (start >= mem->start_addr) {
+ /* The slot starts before section or is aligned to it. */
+ offset = start - mem->start_addr;
+ count = MIN(mem->memory_size - offset, size);
+ } else {
+ /* The slot starts after section. */
+ offset = 0;
+ count = MIN(mem->memory_size, size - (mem->start_addr - start));
+ }
+ ret = kvm_log_clear_one_slot(mem, kml->as_id, offset, count);
+ if (ret < 0) {
+ break;
+ }
+ }
+
+ kvm_slots_unlock(kml);
+
+ return ret;
}
static void kvm_coalesce_mmio_region(MemoryListener *listener,
return NULL;
}
+void kvm_set_max_memslot_size(hwaddr max_slot_size)
+{
+ g_assert(
+ ROUND_UP(max_slot_size, qemu_real_host_page_size) == max_slot_size
+ );
+ kvm_max_slot_size = max_slot_size;
+}
+
static void kvm_set_phys_mem(KVMMemoryListener *kml,
MemoryRegionSection *section, bool add)
{
int err;
MemoryRegion *mr = section->mr;
bool writeable = !mr->readonly && !mr->rom_device;
- hwaddr start_addr, size;
+ hwaddr start_addr, size, slot_size;
void *ram;
if (!memory_region_is_ram(mr)) {
ram = memory_region_get_ram_ptr(mr) + section->offset_within_region +
(start_addr - section->offset_within_address_space);
+ kvm_slots_lock(kml);
+
if (!add) {
- mem = kvm_lookup_matching_slot(kml, start_addr, size);
- if (!mem) {
- return;
- }
+ do {
+ slot_size = MIN(kvm_max_slot_size, size);
+ mem = kvm_lookup_matching_slot(kml, start_addr, slot_size);
+ if (!mem) {
+ goto out;
+ }
+ if (mem->flags & KVM_MEM_LOG_DIRTY_PAGES) {
+ kvm_physical_sync_dirty_bitmap(kml, section);
+ }
+
+ /* unregister the slot */
+ g_free(mem->dirty_bmap);
+ mem->dirty_bmap = NULL;
+ mem->memory_size = 0;
+ mem->flags = 0;
+ err = kvm_set_user_memory_region(kml, mem, false);
+ if (err) {
+ fprintf(stderr, "%s: error unregistering slot: %s\n",
+ __func__, strerror(-err));
+ abort();
+ }
+ start_addr += slot_size;
+ size -= slot_size;
+ } while (size);
+ goto out;
+ }
+
+ /* register the new slot */
+ do {
+ slot_size = MIN(kvm_max_slot_size, size);
+ mem = kvm_alloc_slot(kml);
+ mem->memory_size = slot_size;
+ mem->start_addr = start_addr;
+ mem->ram = ram;
+ mem->flags = kvm_mem_flags(mr);
+
if (mem->flags & KVM_MEM_LOG_DIRTY_PAGES) {
- kvm_physical_sync_dirty_bitmap(kml, section);
+ /*
+ * Reallocate the bmap; it means it doesn't disappear in
+ * middle of a migrate.
+ */
+ kvm_memslot_init_dirty_bitmap(mem);
}
-
- /* unregister the slot */
- mem->memory_size = 0;
- mem->flags = 0;
- err = kvm_set_user_memory_region(kml, mem, false);
+ err = kvm_set_user_memory_region(kml, mem, true);
if (err) {
- fprintf(stderr, "%s: error unregistering slot: %s\n",
- __func__, strerror(-err));
+ fprintf(stderr, "%s: error registering slot: %s\n", __func__,
+ strerror(-err));
abort();
}
- return;
- }
-
- /* register the new slot */
- mem = kvm_alloc_slot(kml);
- mem->memory_size = size;
- mem->start_addr = start_addr;
- mem->ram = ram;
- mem->flags = kvm_mem_flags(mr);
+ start_addr += slot_size;
+ ram += slot_size;
+ size -= slot_size;
+ } while (size);
- err = kvm_set_user_memory_region(kml, mem, true);
- if (err) {
- fprintf(stderr, "%s: error registering slot: %s\n", __func__,
- strerror(-err));
- abort();
- }
+out:
+ kvm_slots_unlock(kml);
}
static void kvm_region_add(MemoryListener *listener,
KVMMemoryListener *kml = container_of(listener, KVMMemoryListener, listener);
int r;
+ kvm_slots_lock(kml);
r = kvm_physical_sync_dirty_bitmap(kml, section);
+ kvm_slots_unlock(kml);
if (r < 0) {
abort();
}
}
+static void kvm_log_clear(MemoryListener *listener,
+ MemoryRegionSection *section)
+{
+ KVMMemoryListener *kml = container_of(listener, KVMMemoryListener, listener);
+ int r;
+
+ r = kvm_physical_log_clear(kml, section);
+ if (r < 0) {
+ error_report_once("%s: kvm log clear failed: mr=%s "
+ "offset=%"HWADDR_PRIx" size=%"PRIx64, __func__,
+ section->mr->name, section->offset_within_region,
+ int128_get64(section->size));
+ abort();
+ }
+}
+
static void kvm_mem_ioeventfd_add(MemoryListener *listener,
MemoryRegionSection *section,
bool match_data, uint64_t data,
data, true, int128_get64(section->size),
match_data);
if (r < 0) {
- fprintf(stderr, "%s: error adding ioeventfd: %s\n",
- __func__, strerror(-r));
+ fprintf(stderr, "%s: error adding ioeventfd: %s (%d)\n",
+ __func__, strerror(-r), -r);
abort();
}
}
data, false, int128_get64(section->size),
match_data);
if (r < 0) {
+ fprintf(stderr, "%s: error deleting ioeventfd: %s (%d)\n",
+ __func__, strerror(-r), -r);
abort();
}
}
data, true, int128_get64(section->size),
match_data);
if (r < 0) {
- fprintf(stderr, "%s: error adding ioeventfd: %s\n",
- __func__, strerror(-r));
+ fprintf(stderr, "%s: error adding ioeventfd: %s (%d)\n",
+ __func__, strerror(-r), -r);
abort();
}
}
data, false, int128_get64(section->size),
match_data);
if (r < 0) {
+ fprintf(stderr, "%s: error deleting ioeventfd: %s (%d)\n",
+ __func__, strerror(-r), -r);
abort();
}
}
{
int i;
+ qemu_mutex_init(&kml->slots_lock);
kml->slots = g_malloc0(s->nr_slots * sizeof(KVMSlot));
kml->as_id = as_id;
kml->listener.log_start = kvm_log_start;
kml->listener.log_stop = kvm_log_stop;
kml->listener.log_sync = kvm_log_sync;
+ kml->listener.log_clear = kvm_log_clear;
kml->listener.priority = 10;
memory_listener_register(&kml->listener, as);
+
+ for (i = 0; i < s->nr_as; ++i) {
+ if (!s->as[i].as) {
+ s->as[i].as = as;
+ s->as[i].ml = kml;
+ break;
+ }
+ }
}
static MemoryListener kvm_io_listener = {
trace_kvm_irqchip_release_virq(virq);
}
+void kvm_irqchip_add_change_notifier(Notifier *n)
+{
+ notifier_list_add(&kvm_irqchip_change_notifiers, n);
+}
+
+void kvm_irqchip_remove_change_notifier(Notifier *n)
+{
+ notifier_remove(n);
+}
+
+void kvm_irqchip_change_notify(void)
+{
+ notifier_list_notify(&kvm_irqchip_change_notifiers, NULL);
+}
+
static unsigned int kvm_hash_msi(uint32_t data)
{
/* This is optimized for IA32 MSI layout. However, no other arch shall
g_hash_table_insert(s->gsimap, irq, GINT_TO_POINTER(gsi));
}
-static void kvm_irqchip_create(MachineState *machine, KVMState *s)
+static void kvm_irqchip_create(KVMState *s)
{
int ret;
+ assert(s->kernel_irqchip_split != ON_OFF_AUTO_AUTO);
if (kvm_check_extension(s, KVM_CAP_IRQCHIP)) {
;
} else if (kvm_check_extension(s, KVM_CAP_S390_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(machine, s);
+ ret = kvm_arch_irqchip_create(s);
if (ret == 0) {
- if (machine_kernel_irqchip_split(machine)) {
+ if (s->kernel_irqchip_split == ON_OFF_AUTO_ON) {
perror("Split IRQ chip mode not supported.");
exit(1);
} else {
bool kvm_vcpu_id_is_valid(int vcpu_id)
{
- KVMState *s = KVM_STATE(current_machine->accelerator);
+ KVMState *s = KVM_STATE(current_accel());
return vcpu_id >= 0 && vcpu_id < kvm_max_vcpu_id(s);
}
const char *name;
int num;
} num_cpus[] = {
- { "SMP", smp_cpus },
- { "hotpluggable", max_cpus },
+ { "SMP", ms->smp.cpus },
+ { "hotpluggable", ms->smp.max_cpus },
{ NULL, }
}, *nc = num_cpus;
int soft_vcpus_limit, hard_vcpus_limit;
* even with KVM. TARGET_PAGE_SIZE is assumed to be the minimum
* page size for the system though.
*/
- assert(TARGET_PAGE_SIZE <= getpagesize());
+ assert(TARGET_PAGE_SIZE <= qemu_real_host_page_size);
s->sigmask_len = 8;
s->nr_slots = 32;
}
+ s->nr_as = kvm_check_extension(s, KVM_CAP_MULTI_ADDRESS_SPACE);
+ if (s->nr_as <= 1) {
+ s->nr_as = 1;
+ }
+ s->as = g_new0(struct KVMAs, s->nr_as);
+
kvm_type = qemu_opt_get(qemu_get_machine_opts(), "kvm-type");
if (mc->kvm_type) {
type = mc->kvm_type(ms, kvm_type);
s->coalesced_pio = s->coalesced_mmio &&
kvm_check_extension(s, KVM_CAP_COALESCED_PIO);
+ s->manual_dirty_log_protect =
+ kvm_check_extension(s, KVM_CAP_MANUAL_DIRTY_LOG_PROTECT2);
+ if (s->manual_dirty_log_protect) {
+ ret = kvm_vm_enable_cap(s, KVM_CAP_MANUAL_DIRTY_LOG_PROTECT2, 0, 1);
+ if (ret) {
+ warn_report("Trying to enable KVM_CAP_MANUAL_DIRTY_LOG_PROTECT2 "
+ "but failed. Falling back to the legacy mode. ");
+ s->manual_dirty_log_protect = false;
+ }
+ }
+
#ifdef KVM_CAP_VCPU_EVENTS
s->vcpu_events = kvm_check_extension(s, KVM_CAP_VCPU_EVENTS);
#endif
s->debugregs = kvm_check_extension(s, KVM_CAP_DEBUGREGS);
#endif
+ s->max_nested_state_len = kvm_check_extension(s, KVM_CAP_NESTED_STATE);
+
#ifdef KVM_CAP_IRQ_ROUTING
kvm_direct_msi_allowed = (kvm_check_extension(s, KVM_CAP_SIGNAL_MSI) > 0);
#endif
goto err;
}
- if (machine_kernel_irqchip_allowed(ms)) {
- kvm_irqchip_create(ms, s);
+ if (s->kernel_irqchip_split == ON_OFF_AUTO_AUTO) {
+ s->kernel_irqchip_split = mc->default_kernel_irqchip_split ? ON_OFF_AUTO_ON : ON_OFF_AUTO_OFF;
+ }
+
+ if (s->kernel_irqchip_allowed) {
+ kvm_irqchip_create(s);
}
if (kvm_eventfds_allowed) {
ent = &ring->coalesced_mmio[ring->first];
if (ent->pio == 1) {
- address_space_rw(&address_space_io, ent->phys_addr,
- MEMTXATTRS_UNSPECIFIED, ent->data,
- ent->len, true);
+ address_space_write(&address_space_io, ent->phys_addr,
+ MEMTXATTRS_UNSPECIFIED, ent->data,
+ ent->len);
} else {
cpu_physical_memory_write(ent->phys_addr, ent->data, ent->len);
}
return kvm_state->debugregs;
}
+int kvm_max_nested_state_length(void)
+{
+ return kvm_state->max_nested_state_len;
+}
+
int kvm_has_many_ioeventfds(void)
{
if (!kvm_enabled()) {
return r;
}
+static bool kvm_accel_has_memory(MachineState *ms, AddressSpace *as,
+ hwaddr start_addr, hwaddr size)
+{
+ KVMState *kvm = KVM_STATE(ms->accelerator);
+ int i;
+
+ for (i = 0; i < kvm->nr_as; ++i) {
+ if (kvm->as[i].as == as && kvm->as[i].ml) {
+ size = MIN(kvm_max_slot_size, size);
+ return NULL != kvm_lookup_matching_slot(kvm->as[i].ml,
+ start_addr, size);
+ }
+ }
+
+ return false;
+}
+
+static void kvm_get_kvm_shadow_mem(Object *obj, Visitor *v,
+ const char *name, void *opaque,
+ Error **errp)
+{
+ KVMState *s = KVM_STATE(obj);
+ int64_t value = s->kvm_shadow_mem;
+
+ visit_type_int(v, name, &value, errp);
+}
+
+static void kvm_set_kvm_shadow_mem(Object *obj, Visitor *v,
+ const char *name, void *opaque,
+ Error **errp)
+{
+ KVMState *s = KVM_STATE(obj);
+ Error *error = NULL;
+ int64_t value;
+
+ visit_type_int(v, name, &value, &error);
+ if (error) {
+ error_propagate(errp, error);
+ return;
+ }
+
+ s->kvm_shadow_mem = value;
+}
+
+static void kvm_set_kernel_irqchip(Object *obj, Visitor *v,
+ const char *name, void *opaque,
+ Error **errp)
+{
+ Error *err = NULL;
+ KVMState *s = KVM_STATE(obj);
+ OnOffSplit mode;
+
+ visit_type_OnOffSplit(v, name, &mode, &err);
+ if (err) {
+ error_propagate(errp, err);
+ return;
+ } else {
+ switch (mode) {
+ case ON_OFF_SPLIT_ON:
+ s->kernel_irqchip_allowed = true;
+ s->kernel_irqchip_required = true;
+ s->kernel_irqchip_split = ON_OFF_AUTO_OFF;
+ break;
+ case ON_OFF_SPLIT_OFF:
+ s->kernel_irqchip_allowed = false;
+ s->kernel_irqchip_required = false;
+ s->kernel_irqchip_split = ON_OFF_AUTO_OFF;
+ break;
+ case ON_OFF_SPLIT_SPLIT:
+ s->kernel_irqchip_allowed = true;
+ s->kernel_irqchip_required = true;
+ s->kernel_irqchip_split = ON_OFF_AUTO_ON;
+ break;
+ default:
+ /* The value was checked in visit_type_OnOffSplit() above. If
+ * we get here, then something is wrong in QEMU.
+ */
+ abort();
+ }
+ }
+}
+
+bool kvm_kernel_irqchip_allowed(void)
+{
+ return kvm_state->kernel_irqchip_allowed;
+}
+
+bool kvm_kernel_irqchip_required(void)
+{
+ return kvm_state->kernel_irqchip_required;
+}
+
+bool kvm_kernel_irqchip_split(void)
+{
+ return kvm_state->kernel_irqchip_split == ON_OFF_AUTO_ON;
+}
+
+static void kvm_accel_instance_init(Object *obj)
+{
+ KVMState *s = KVM_STATE(obj);
+
+ s->kvm_shadow_mem = -1;
+ s->kernel_irqchip_allowed = true;
+ s->kernel_irqchip_split = ON_OFF_AUTO_AUTO;
+}
+
static void kvm_accel_class_init(ObjectClass *oc, void *data)
{
AccelClass *ac = ACCEL_CLASS(oc);
ac->name = "KVM";
ac->init_machine = kvm_init;
+ ac->has_memory = kvm_accel_has_memory;
ac->allowed = &kvm_allowed;
+
+ object_class_property_add(oc, "kernel-irqchip", "on|off|split",
+ NULL, kvm_set_kernel_irqchip,
+ NULL, NULL, &error_abort);
+ object_class_property_set_description(oc, "kernel-irqchip",
+ "Configure KVM in-kernel irqchip", &error_abort);
+
+ object_class_property_add(oc, "kvm-shadow-mem", "int",
+ kvm_get_kvm_shadow_mem, kvm_set_kvm_shadow_mem,
+ NULL, NULL, &error_abort);
+ object_class_property_set_description(oc, "kvm-shadow-mem",
+ "KVM shadow MMU size", &error_abort);
}
static const TypeInfo kvm_accel_type = {
.name = TYPE_KVM_ACCEL,
.parent = TYPE_ACCEL,
+ .instance_init = kvm_accel_instance_init,
.class_init = kvm_accel_class_init,
.instance_size = sizeof(KVMState),
};
projects / mirror_qemu.git / blobdiff