hax: Support for Linux hosts

Intel HAXM supports now 32-bit and 64-bit Linux hosts. This patch includes
the corresponding userland changes.

Since the Darwin userland backend is POSIX-compliant, the hax-darwin.{c,h}
files have been renamed to hax-posix.{c,h}. This prefix is consistent with
the naming used in the rest of QEMU.

Signed-off-by: Alexandro Sanchez Bach <asanchez@kryptoslogic.com>
Message-Id: <20181115013331.65820-1-asanchez@kryptoslogic.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

1 files changed, 323 insertions, 0 deletions

diff --git a/target/i386/hax-posix.c b/target/i386/hax-posix.c
new file mode 100644
index 0000000000..a5426a6dac
--- /dev/null
+++ b/target/i386/hax-posix.c
@@ -0,0 +1,323 @@
+/*
+ * QEMU HAXM support
+ *
+ * Copyright (c) 2011 Intel Corporation
+ *  Written by:
+ *  Jiang Yunhong<yunhong.jiang@intel.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.
+ *
+ */
+
+/* HAX module interface - darwin version */
+#include "qemu/osdep.h"
+#include <sys/ioctl.h>
+
+#include "target/i386/hax-i386.h"
+
+hax_fd hax_mod_open(void)
+{
+    int fd = open("/dev/HAX", O_RDWR);
+    if (fd == -1) {
+        fprintf(stderr, "Failed to open the hax module\n");
+    }
+
+    fcntl(fd, F_SETFD, FD_CLOEXEC);
+
+    return fd;
+}
+
+int hax_populate_ram(uint64_t va, uint64_t size)
+{
+    int ret;
+
+    if (!hax_global.vm || !hax_global.vm->fd) {
+        fprintf(stderr, "Allocate memory before vm create?\n");
+        return -EINVAL;
+    }
+
+    if (hax_global.supports_64bit_ramblock) {
+        struct hax_ramblock_info ramblock = {
+            .start_va = va,
+            .size = size,
+            .reserved = 0
+        };
+
+        ret = ioctl(hax_global.vm->fd, HAX_VM_IOCTL_ADD_RAMBLOCK, &ramblock);
+    } else {
+        struct hax_alloc_ram_info info = {
+            .size = (uint32_t)size,
+            .pad = 0,
+            .va = va
+        };
+
+        ret = ioctl(hax_global.vm->fd, HAX_VM_IOCTL_ALLOC_RAM, &info);
+    }
+    if (ret < 0) {
+        fprintf(stderr, "Failed to register RAM block: ret=%d, va=0x%" PRIx64
+                ", size=0x%" PRIx64 ", method=%s\n", ret, va, size,
+                hax_global.supports_64bit_ramblock ? "new" : "legacy");
+        return ret;
+    }
+    return 0;
+}
+
+int hax_set_ram(uint64_t start_pa, uint32_t size, uint64_t host_va, int flags)
+{
+    struct hax_set_ram_info info;
+    int ret;
+
+    info.pa_start = start_pa;
+    info.size = size;
+    info.va = host_va;
+    info.flags = (uint8_t) flags;
+
+    ret = ioctl(hax_global.vm->fd, HAX_VM_IOCTL_SET_RAM, &info);
+    if (ret < 0) {
+        return -errno;
+    }
+    return 0;
+}
+
+int hax_capability(struct hax_state *hax, struct hax_capabilityinfo *cap)
+{
+    int ret;
+
+    ret = ioctl(hax->fd, HAX_IOCTL_CAPABILITY, cap);
+    if (ret == -1) {
+        fprintf(stderr, "Failed to get HAX capability\n");
+        return -errno;
+    }
+
+    return 0;
+}
+
+int hax_mod_version(struct hax_state *hax, struct hax_module_version *version)
+{
+    int ret;
+
+    ret = ioctl(hax->fd, HAX_IOCTL_VERSION, version);
+    if (ret == -1) {
+        fprintf(stderr, "Failed to get HAX version\n");
+        return -errno;
+    }
+
+    return 0;
+}
+
+static char *hax_vm_devfs_string(int vm_id)
+{
+    char *name;
+
+    if (vm_id > MAX_VM_ID) {
+        fprintf(stderr, "Too big VM id\n");
+        return NULL;
+    }
+
+#define HAX_VM_DEVFS "/dev/hax_vm/vmxx"
+    name = g_strdup(HAX_VM_DEVFS);
+    if (!name) {
+        return NULL;
+    }
+
+    snprintf(name, sizeof HAX_VM_DEVFS, "/dev/hax_vm/vm%02d", vm_id);
+    return name;
+}
+
+static char *hax_vcpu_devfs_string(int vm_id, int vcpu_id)
+{
+    char *name;
+
+    if (vm_id > MAX_VM_ID || vcpu_id > MAX_VCPU_ID) {
+        fprintf(stderr, "Too big vm id %x or vcpu id %x\n", vm_id, vcpu_id);
+        return NULL;
+    }
+
+#define HAX_VCPU_DEVFS "/dev/hax_vmxx/vcpuxx"
+    name = g_strdup(HAX_VCPU_DEVFS);
+    if (!name) {
+        return NULL;
+    }
+
+    snprintf(name, sizeof HAX_VCPU_DEVFS, "/dev/hax_vm%02d/vcpu%02d",
+             vm_id, vcpu_id);
+    return name;
+}
+
+int hax_host_create_vm(struct hax_state *hax, int *vmid)
+{
+    int ret;
+    int vm_id = 0;
+
+    if (hax_invalid_fd(hax->fd)) {
+        return -EINVAL;
+    }
+
+    if (hax->vm) {
+        return 0;
+    }
+
+    ret = ioctl(hax->fd, HAX_IOCTL_CREATE_VM, &vm_id);
+    *vmid = vm_id;
+    return ret;
+}
+
+hax_fd hax_host_open_vm(struct hax_state *hax, int vm_id)
+{
+    hax_fd fd;
+    char *vm_name = NULL;
+
+    vm_name = hax_vm_devfs_string(vm_id);
+    if (!vm_name) {
+        return -1;
+    }
+
+    fd = open(vm_name, O_RDWR);
+    g_free(vm_name);
+
+    fcntl(fd, F_SETFD, FD_CLOEXEC);
+
+    return fd;
+}
+
+int hax_notify_qemu_version(hax_fd vm_fd, struct hax_qemu_version *qversion)
+{
+    int ret;
+
+    if (hax_invalid_fd(vm_fd)) {
+        return -EINVAL;
+    }
+
+    ret = ioctl(vm_fd, HAX_VM_IOCTL_NOTIFY_QEMU_VERSION, qversion);
+
+    if (ret < 0) {
+        fprintf(stderr, "Failed to notify qemu API version\n");
+        return ret;
+    }
+    return 0;
+}
+
+/* Simply assume the size should be bigger than the hax_tunnel,
+ * since the hax_tunnel can be extended later with compatibility considered
+ */
+int hax_host_create_vcpu(hax_fd vm_fd, int vcpuid)
+{
+    int ret;
+
+    ret = ioctl(vm_fd, HAX_VM_IOCTL_VCPU_CREATE, &vcpuid);
+    if (ret < 0) {
+        fprintf(stderr, "Failed to create vcpu %x\n", vcpuid);
+    }
+
+    return ret;
+}
+
+hax_fd hax_host_open_vcpu(int vmid, int vcpuid)
+{
+    char *devfs_path = NULL;
+    hax_fd fd;
+
+    devfs_path = hax_vcpu_devfs_string(vmid, vcpuid);
+    if (!devfs_path) {
+        fprintf(stderr, "Failed to get the devfs\n");
+        return -EINVAL;
+    }
+
+    fd = open(devfs_path, O_RDWR);
+    g_free(devfs_path);
+    if (fd < 0) {
+        fprintf(stderr, "Failed to open the vcpu devfs\n");
+    }
+    fcntl(fd, F_SETFD, FD_CLOEXEC);
+    return fd;
+}
+
+int hax_host_setup_vcpu_channel(struct hax_vcpu_state *vcpu)
+{
+    int ret;
+    struct hax_tunnel_info info;
+
+    ret = ioctl(vcpu->fd, HAX_VCPU_IOCTL_SETUP_TUNNEL, &info);
+    if (ret) {
+        fprintf(stderr, "Failed to setup the hax tunnel\n");
+        return ret;
+    }
+
+    if (!valid_hax_tunnel_size(info.size)) {
+        fprintf(stderr, "Invalid hax tunnel size %x\n", info.size);
+        ret = -EINVAL;
+        return ret;
+    }
+
+    vcpu->tunnel = (struct hax_tunnel *) (intptr_t) (info.va);
+    vcpu->iobuf = (unsigned char *) (intptr_t) (info.io_va);
+    return 0;
+}
+
+int hax_vcpu_run(struct hax_vcpu_state *vcpu)
+{
+    return ioctl(vcpu->fd, HAX_VCPU_IOCTL_RUN, NULL);
+}
+
+int hax_sync_fpu(CPUArchState *env, struct fx_layout *fl, int set)
+{
+    int ret, fd;
+
+    fd = hax_vcpu_get_fd(env);
+    if (fd <= 0) {
+        return -1;
+    }
+
+    if (set) {
+        ret = ioctl(fd, HAX_VCPU_IOCTL_SET_FPU, fl);
+    } else {
+        ret = ioctl(fd, HAX_VCPU_IOCTL_GET_FPU, fl);
+    }
+    return ret;
+}
+
+int hax_sync_msr(CPUArchState *env, struct hax_msr_data *msrs, int set)
+{
+    int ret, fd;
+
+    fd = hax_vcpu_get_fd(env);
+    if (fd <= 0) {
+        return -1;
+    }
+    if (set) {
+        ret = ioctl(fd, HAX_VCPU_IOCTL_SET_MSRS, msrs);
+    } else {
+        ret = ioctl(fd, HAX_VCPU_IOCTL_GET_MSRS, msrs);
+    }
+    return ret;
+}
+
+int hax_sync_vcpu_state(CPUArchState *env, struct vcpu_state_t *state, int set)
+{
+    int ret, fd;
+
+    fd = hax_vcpu_get_fd(env);
+    if (fd <= 0) {
+        return -1;
+    }
+
+    if (set) {
+        ret = ioctl(fd, HAX_VCPU_SET_REGS, state);
+    } else {
+        ret = ioctl(fd, HAX_VCPU_GET_REGS, state);
+    }
+    return ret;
+}
+
+int hax_inject_interrupt(CPUArchState *env, int vector)
+{
+    int fd;
+
+    fd = hax_vcpu_get_fd(env);
+    if (fd <= 0) {
+        return -1;
+    }
+
+    return ioctl(fd, HAX_VCPU_IOCTL_INTERRUPT, &vector);
+}