Add missing files to KVM commit.

Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>



git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@5629 c046a42c-6fe2-441c-8c8c-71466251a162

1 files changed, 374 insertions, 0 deletions

diff --git a/kvm-all.c b/kvm-all.c
new file mode 100644
index 000000000..c3a46e243
--- /dev/null
+++ b/kvm-all.c
@@ -0,0 +1,374 @@
+/*
+ * QEMU KVM support
+ *
+ * Copyright IBM, Corp. 2008
+ *
+ * Authors:
+ *  Anthony Liguori   <aliguori@us.ibm.com>
+ *
+ * This work is licensed under the terms of the GNU GPL, version 2 or later.
+ * See the COPYING file in the top-level directory.
+ *
+ */
+
+#include <sys/types.h>
+#include <sys/ioctl.h>
+#include <sys/mman.h>
+
+#include <linux/kvm.h>
+
+#include "qemu-common.h"
+#include "sysemu.h"
+#include "kvm.h"
+
+//#define DEBUG_KVM
+
+#ifdef DEBUG_KVM
+#define dprintf(fmt, ...) \
+    do { fprintf(stderr, fmt, ## __VA_ARGS__); } while (0)
+#else
+#define dprintf(fmt, ...) \
+    do { } while (0)
+#endif
+
+typedef struct kvm_userspace_memory_region KVMSlot;
+
+int kvm_allowed = 0;
+
+struct KVMState
+{
+    KVMSlot slots[32];
+    int fd;
+    int vmfd;
+};
+
+static KVMState *kvm_state;
+
+static KVMSlot *kvm_alloc_slot(KVMState *s)
+{
+    int i;
+
+    for (i = 0; i < ARRAY_SIZE(s->slots); i++) {
+        if (s->slots[i].memory_size == 0)
+            return &s->slots[i];
+    }
+
+    return NULL;
+}
+
+static KVMSlot *kvm_lookup_slot(KVMState *s, target_phys_addr_t start_addr)
+{
+    int i;
+
+    for (i = 0; i < ARRAY_SIZE(s->slots); i++) {
+        KVMSlot *mem = &s->slots[i];
+
+        if (start_addr >= mem->guest_phys_addr &&
+            start_addr < (mem->guest_phys_addr + mem->memory_size))
+            return mem;
+    }
+
+    return NULL;
+}
+
+int kvm_init_vcpu(CPUState *env)
+{
+    KVMState *s = kvm_state;
+    long mmap_size;
+    int ret;
+
+    dprintf("kvm_init_vcpu\n");
+
+    ret = kvm_vm_ioctl(s, KVM_CREATE_VCPU,
+                       (void *)(unsigned long)env->cpu_index);
+    if (ret < 0) {
+        dprintf("kvm_create_vcpu failed\n");
+        goto err;
+    }
+
+    env->kvm_fd = ret;
+    env->kvm_state = s;
+
+    mmap_size = kvm_ioctl(s, KVM_GET_VCPU_MMAP_SIZE, 0);
+    if (mmap_size < 0) {
+        dprintf("KVM_GET_VCPU_MMAP_SIZE failed\n");
+        goto err;
+    }
+
+    env->kvm_run = mmap(NULL, mmap_size, PROT_READ | PROT_WRITE, MAP_SHARED,
+                        env->kvm_fd, 0);
+    if (env->kvm_run == MAP_FAILED) {
+        ret = -errno;
+        dprintf("mmap'ing vcpu state failed\n");
+        goto err;
+    }
+
+    ret = kvm_arch_init_vcpu(env);
+
+err:
+    return ret;
+}
+
+int kvm_init(int smp_cpus)
+{
+    KVMState *s;
+    int ret;
+    int i;
+
+    if (smp_cpus > 1)
+        return -EINVAL;
+
+    s = qemu_mallocz(sizeof(KVMState));
+    if (s == NULL)
+        return -ENOMEM;
+
+    for (i = 0; i < ARRAY_SIZE(s->slots); i++)
+        s->slots[i].slot = i;
+
+    s->vmfd = -1;
+    s->fd = open("/dev/kvm", O_RDWR);
+    if (s->fd == -1) {
+        fprintf(stderr, "Could not access KVM kernel module: %m\n");
+        ret = -errno;
+        goto err;
+    }
+
+    ret = kvm_ioctl(s, KVM_GET_API_VERSION, 0);
+    if (ret < KVM_API_VERSION) {
+        if (ret > 0)
+            ret = -EINVAL;
+        fprintf(stderr, "kvm version too old\n");
+        goto err;
+    }
+
+    if (ret > KVM_API_VERSION) {
+        ret = -EINVAL;
+        fprintf(stderr, "kvm version not supported\n");
+        goto err;
+    }
+
+    s->vmfd = kvm_ioctl(s, KVM_CREATE_VM, 0);
+    if (s->vmfd < 0)
+        goto err;
+
+    /* initially, KVM allocated its own memory and we had to jump through
+     * hooks to make phys_ram_base point to this.  Modern versions of KVM
+     * just use a user allocated buffer so we can use phys_ram_base
+     * unmodified.  Make sure we have a sufficiently modern version of KVM.
+     */
+    ret = kvm_ioctl(s, KVM_CHECK_EXTENSION, (void *)KVM_CAP_USER_MEMORY);
+    if (ret <= 0) {
+        if (ret == 0)
+            ret = -EINVAL;
+        fprintf(stderr, "kvm does not support KVM_CAP_USER_MEMORY\n");
+        goto err;
+    }
+
+    ret = kvm_arch_init(s, smp_cpus);
+    if (ret < 0)
+        goto err;
+
+    kvm_state = s;
+
+    return 0;
+
+err:
+    if (s) {
+        if (s->vmfd != -1)
+            close(s->vmfd);
+        if (s->fd != -1)
+            close(s->fd);
+    }
+    qemu_free(s);
+
+    return ret;
+}
+
+static int kvm_handle_io(CPUState *env, uint16_t port, void *data,
+                         int direction, int size, uint32_t count)
+{
+    int i;
+    uint8_t *ptr = data;
+
+    for (i = 0; i < count; i++) {
+        if (direction == KVM_EXIT_IO_IN) {
+            switch (size) {
+            case 1:
+                stb_p(ptr, cpu_inb(env, port));
+                break;
+            case 2:
+                stw_p(ptr, cpu_inw(env, port));
+                break;
+            case 4:
+                stl_p(ptr, cpu_inl(env, port));
+                break;
+            }
+        } else {
+            switch (size) {
+            case 1:
+                cpu_outb(env, port, ldub_p(ptr));
+                break;
+            case 2:
+                cpu_outw(env, port, lduw_p(ptr));
+                break;
+            case 4:
+                cpu_outl(env, port, ldl_p(ptr));
+                break;
+            }
+        }
+
+        ptr += size;
+    }
+
+    return 1;
+}
+
+int kvm_cpu_exec(CPUState *env)
+{
+    struct kvm_run *run = env->kvm_run;
+    int ret;
+
+    dprintf("kvm_cpu_exec()\n");
+
+    do {
+        kvm_arch_pre_run(env, run);
+
+        if ((env->interrupt_request & CPU_INTERRUPT_EXIT)) {
+            dprintf("interrupt exit requested\n");
+            ret = 0;
+            break;
+        }
+
+        ret = kvm_vcpu_ioctl(env, KVM_RUN, 0);
+        kvm_arch_post_run(env, run);
+
+        if (ret == -EINTR || ret == -EAGAIN) {
+            dprintf("io window exit\n");
+            ret = 0;
+            break;
+        }
+
+        if (ret < 0) {
+            dprintf("kvm run failed %s\n", strerror(-ret));
+            abort();
+        }
+
+        ret = 0; /* exit loop */
+        switch (run->exit_reason) {
+        case KVM_EXIT_IO:
+            dprintf("handle_io\n");
+            ret = kvm_handle_io(env, run->io.port,
+                                (uint8_t *)run + run->io.data_offset,
+                                run->io.direction,
+                                run->io.size,
+                                run->io.count);
+            break;
+        case KVM_EXIT_MMIO:
+            dprintf("handle_mmio\n");
+            cpu_physical_memory_rw(run->mmio.phys_addr,
+                                   run->mmio.data,
+                                   run->mmio.len,
+                                   run->mmio.is_write);
+            ret = 1;
+            break;
+        case KVM_EXIT_IRQ_WINDOW_OPEN:
+            dprintf("irq_window_open\n");
+            break;
+        case KVM_EXIT_SHUTDOWN:
+            dprintf("shutdown\n");
+            qemu_system_reset_request();
+            ret = 1;
+            break;
+        case KVM_EXIT_UNKNOWN:
+            dprintf("kvm_exit_unknown\n");
+            break;
+        case KVM_EXIT_FAIL_ENTRY:
+            dprintf("kvm_exit_fail_entry\n");
+            break;
+        case KVM_EXIT_EXCEPTION:
+            dprintf("kvm_exit_exception\n");
+            break;
+        case KVM_EXIT_DEBUG:
+            dprintf("kvm_exit_debug\n");
+            break;
+        default:
+            dprintf("kvm_arch_handle_exit\n");
+            ret = kvm_arch_handle_exit(env, run);
+            break;
+        }
+    } while (ret > 0);
+
+    return ret;
+}
+
+void kvm_set_phys_mem(target_phys_addr_t start_addr,
+                      ram_addr_t size,
+                      ram_addr_t phys_offset)
+{
+    KVMState *s = kvm_state;
+    ram_addr_t flags = phys_offset & ~TARGET_PAGE_MASK;
+    KVMSlot *mem;
+
+    /* KVM does not support read-only slots */
+    phys_offset &= ~IO_MEM_ROM;
+
+    mem = kvm_lookup_slot(s, start_addr);
+    if (mem) {
+        if (flags == IO_MEM_UNASSIGNED) {
+            mem->memory_size = 0;
+            mem->guest_phys_addr = start_addr;
+            mem->userspace_addr = 0;
+            mem->flags = 0;
+
+            kvm_vm_ioctl(s, KVM_SET_USER_MEMORY_REGION, mem);
+        } else if (start_addr >= mem->guest_phys_addr &&
+                   (start_addr + size) <= (mem->guest_phys_addr + mem->memory_size))
+            return;
+    }
+
+    /* KVM does not need to know about this memory */
+    if (flags >= IO_MEM_UNASSIGNED)
+        return;
+
+    mem = kvm_alloc_slot(s);
+    mem->memory_size = size;
+    mem->guest_phys_addr = start_addr;
+    mem->userspace_addr = (unsigned long)(phys_ram_base + phys_offset);
+    mem->flags = 0;
+
+    kvm_vm_ioctl(s, KVM_SET_USER_MEMORY_REGION, mem);
+    /* FIXME deal with errors */
+}
+
+int kvm_ioctl(KVMState *s, int type, void *data)
+{
+    int ret;
+
+    ret = ioctl(s->fd, type, data);
+    if (ret == -1)
+        ret = -errno;
+
+    return ret;
+}
+
+int kvm_vm_ioctl(KVMState *s, int type, void *data)
+{
+    int ret;
+
+    ret = ioctl(s->vmfd, type, data);
+    if (ret == -1)
+        ret = -errno;
+
+    return ret;
+}
+
+int kvm_vcpu_ioctl(CPUState *env, int type, void *data)
+{
+    int ret;
+
+    ret = ioctl(env->kvm_fd, type, data);
+    if (ret == -1)
+        ret = -errno;
+
+    return ret;
+}