| /* |
| * copyright (c) 2006 IBM Corporation |
| * Authored by: Mike D. Day <ncmike@us.ibm.com> |
| * |
| * This program is free software; you can redistribute it and/or modify |
| * it under the terms of the GNU General Public License version 2 as |
| * published by the Free Software Foundation. |
| */ |
| |
| #include <linux/kernel.h> |
| #include <linux/module.h> |
| #include <linux/kobject.h> |
| |
| #include <asm/xen/hypervisor.h> |
| #include <asm/xen/hypercall.h> |
| |
| #include <xen/xen.h> |
| #include <xen/xenbus.h> |
| #include <xen/interface/xen.h> |
| #include <xen/interface/version.h> |
| |
| #define HYPERVISOR_ATTR_RO(_name) \ |
| static struct hyp_sysfs_attr _name##_attr = __ATTR_RO(_name) |
| |
| #define HYPERVISOR_ATTR_RW(_name) \ |
| static struct hyp_sysfs_attr _name##_attr = \ |
| __ATTR(_name, 0644, _name##_show, _name##_store) |
| |
| struct hyp_sysfs_attr { |
| struct attribute attr; |
| ssize_t (*show)(struct hyp_sysfs_attr *, char *); |
| ssize_t (*store)(struct hyp_sysfs_attr *, const char *, size_t); |
| void *hyp_attr_data; |
| }; |
| |
| static ssize_t type_show(struct hyp_sysfs_attr *attr, char *buffer) |
| { |
| return sprintf(buffer, "xen\n"); |
| } |
| |
| HYPERVISOR_ATTR_RO(type); |
| |
| static int __init xen_sysfs_type_init(void) |
| { |
| return sysfs_create_file(hypervisor_kobj, &type_attr.attr); |
| } |
| |
| static void xen_sysfs_type_destroy(void) |
| { |
| sysfs_remove_file(hypervisor_kobj, &type_attr.attr); |
| } |
| |
| /* xen version attributes */ |
| static ssize_t major_show(struct hyp_sysfs_attr *attr, char *buffer) |
| { |
| int version = HYPERVISOR_xen_version(XENVER_version, NULL); |
| if (version) |
| return sprintf(buffer, "%d\n", version >> 16); |
| return -ENODEV; |
| } |
| |
| HYPERVISOR_ATTR_RO(major); |
| |
| static ssize_t minor_show(struct hyp_sysfs_attr *attr, char *buffer) |
| { |
| int version = HYPERVISOR_xen_version(XENVER_version, NULL); |
| if (version) |
| return sprintf(buffer, "%d\n", version & 0xff); |
| return -ENODEV; |
| } |
| |
| HYPERVISOR_ATTR_RO(minor); |
| |
| static ssize_t extra_show(struct hyp_sysfs_attr *attr, char *buffer) |
| { |
| int ret = -ENOMEM; |
| char *extra; |
| |
| extra = kmalloc(XEN_EXTRAVERSION_LEN, GFP_KERNEL); |
| if (extra) { |
| ret = HYPERVISOR_xen_version(XENVER_extraversion, extra); |
| if (!ret) |
| ret = sprintf(buffer, "%s\n", extra); |
| kfree(extra); |
| } |
| |
| return ret; |
| } |
| |
| HYPERVISOR_ATTR_RO(extra); |
| |
| static struct attribute *version_attrs[] = { |
| &major_attr.attr, |
| &minor_attr.attr, |
| &extra_attr.attr, |
| NULL |
| }; |
| |
| static struct attribute_group version_group = { |
| .name = "version", |
| .attrs = version_attrs, |
| }; |
| |
| static int __init xen_sysfs_version_init(void) |
| { |
| return sysfs_create_group(hypervisor_kobj, &version_group); |
| } |
| |
| static void xen_sysfs_version_destroy(void) |
| { |
| sysfs_remove_group(hypervisor_kobj, &version_group); |
| } |
| |
| /* UUID */ |
| |
| static ssize_t uuid_show(struct hyp_sysfs_attr *attr, char *buffer) |
| { |
| char *vm, *val; |
| int ret; |
| extern int xenstored_ready; |
| |
| if (!xenstored_ready) |
| return -EBUSY; |
| |
| vm = xenbus_read(XBT_NIL, "vm", "", NULL); |
| if (IS_ERR(vm)) |
| return PTR_ERR(vm); |
| val = xenbus_read(XBT_NIL, vm, "uuid", NULL); |
| kfree(vm); |
| if (IS_ERR(val)) |
| return PTR_ERR(val); |
| ret = sprintf(buffer, "%s\n", val); |
| kfree(val); |
| return ret; |
| } |
| |
| HYPERVISOR_ATTR_RO(uuid); |
| |
| static int __init xen_sysfs_uuid_init(void) |
| { |
| return sysfs_create_file(hypervisor_kobj, &uuid_attr.attr); |
| } |
| |
| static void xen_sysfs_uuid_destroy(void) |
| { |
| sysfs_remove_file(hypervisor_kobj, &uuid_attr.attr); |
| } |
| |
| /* xen compilation attributes */ |
| |
| static ssize_t compiler_show(struct hyp_sysfs_attr *attr, char *buffer) |
| { |
| int ret = -ENOMEM; |
| struct xen_compile_info *info; |
| |
| info = kmalloc(sizeof(struct xen_compile_info), GFP_KERNEL); |
| if (info) { |
| ret = HYPERVISOR_xen_version(XENVER_compile_info, info); |
| if (!ret) |
| ret = sprintf(buffer, "%s\n", info->compiler); |
| kfree(info); |
| } |
| |
| return ret; |
| } |
| |
| HYPERVISOR_ATTR_RO(compiler); |
| |
| static ssize_t compiled_by_show(struct hyp_sysfs_attr *attr, char *buffer) |
| { |
| int ret = -ENOMEM; |
| struct xen_compile_info *info; |
| |
| info = kmalloc(sizeof(struct xen_compile_info), GFP_KERNEL); |
| if (info) { |
| ret = HYPERVISOR_xen_version(XENVER_compile_info, info); |
| if (!ret) |
| ret = sprintf(buffer, "%s\n", info->compile_by); |
| kfree(info); |
| } |
| |
| return ret; |
| } |
| |
| HYPERVISOR_ATTR_RO(compiled_by); |
| |
| static ssize_t compile_date_show(struct hyp_sysfs_attr *attr, char *buffer) |
| { |
| int ret = -ENOMEM; |
| struct xen_compile_info *info; |
| |
| info = kmalloc(sizeof(struct xen_compile_info), GFP_KERNEL); |
| if (info) { |
| ret = HYPERVISOR_xen_version(XENVER_compile_info, info); |
| if (!ret) |
| ret = sprintf(buffer, "%s\n", info->compile_date); |
| kfree(info); |
| } |
| |
| return ret; |
| } |
| |
| HYPERVISOR_ATTR_RO(compile_date); |
| |
| static struct attribute *xen_compile_attrs[] = { |
| &compiler_attr.attr, |
| &compiled_by_attr.attr, |
| &compile_date_attr.attr, |
| NULL |
| }; |
| |
| static struct attribute_group xen_compilation_group = { |
| .name = "compilation", |
| .attrs = xen_compile_attrs, |
| }; |
| |
| int __init static xen_compilation_init(void) |
| { |
| return sysfs_create_group(hypervisor_kobj, &xen_compilation_group); |
| } |
| |
| static void xen_compilation_destroy(void) |
| { |
| sysfs_remove_group(hypervisor_kobj, &xen_compilation_group); |
| } |
| |
| /* xen properties info */ |
| |
| static ssize_t capabilities_show(struct hyp_sysfs_attr *attr, char *buffer) |
| { |
| int ret = -ENOMEM; |
| char *caps; |
| |
| caps = kmalloc(XEN_CAPABILITIES_INFO_LEN, GFP_KERNEL); |
| if (caps) { |
| ret = HYPERVISOR_xen_version(XENVER_capabilities, caps); |
| if (!ret) |
| ret = sprintf(buffer, "%s\n", caps); |
| kfree(caps); |
| } |
| |
| return ret; |
| } |
| |
| HYPERVISOR_ATTR_RO(capabilities); |
| |
| static ssize_t changeset_show(struct hyp_sysfs_attr *attr, char *buffer) |
| { |
| int ret = -ENOMEM; |
| char *cset; |
| |
| cset = kmalloc(XEN_CHANGESET_INFO_LEN, GFP_KERNEL); |
| if (cset) { |
| ret = HYPERVISOR_xen_version(XENVER_changeset, cset); |
| if (!ret) |
| ret = sprintf(buffer, "%s\n", cset); |
| kfree(cset); |
| } |
| |
| return ret; |
| } |
| |
| HYPERVISOR_ATTR_RO(changeset); |
| |
| static ssize_t virtual_start_show(struct hyp_sysfs_attr *attr, char *buffer) |
| { |
| int ret = -ENOMEM; |
| struct xen_platform_parameters *parms; |
| |
| parms = kmalloc(sizeof(struct xen_platform_parameters), GFP_KERNEL); |
| if (parms) { |
| ret = HYPERVISOR_xen_version(XENVER_platform_parameters, |
| parms); |
| if (!ret) |
| ret = sprintf(buffer, "%lx\n", parms->virt_start); |
| kfree(parms); |
| } |
| |
| return ret; |
| } |
| |
| HYPERVISOR_ATTR_RO(virtual_start); |
| |
| static ssize_t pagesize_show(struct hyp_sysfs_attr *attr, char *buffer) |
| { |
| int ret; |
| |
| ret = HYPERVISOR_xen_version(XENVER_pagesize, NULL); |
| if (ret > 0) |
| ret = sprintf(buffer, "%x\n", ret); |
| |
| return ret; |
| } |
| |
| HYPERVISOR_ATTR_RO(pagesize); |
| |
| static ssize_t xen_feature_show(int index, char *buffer) |
| { |
| ssize_t ret; |
| struct xen_feature_info info; |
| |
| info.submap_idx = index; |
| ret = HYPERVISOR_xen_version(XENVER_get_features, &info); |
| if (!ret) |
| ret = sprintf(buffer, "%08x", info.submap); |
| |
| return ret; |
| } |
| |
| static ssize_t features_show(struct hyp_sysfs_attr *attr, char *buffer) |
| { |
| ssize_t len; |
| int i; |
| |
| len = 0; |
| for (i = XENFEAT_NR_SUBMAPS-1; i >= 0; i--) { |
| int ret = xen_feature_show(i, buffer + len); |
| if (ret < 0) { |
| if (len == 0) |
| len = ret; |
| break; |
| } |
| len += ret; |
| } |
| if (len > 0) |
| buffer[len++] = '\n'; |
| |
| return len; |
| } |
| |
| HYPERVISOR_ATTR_RO(features); |
| |
| static struct attribute *xen_properties_attrs[] = { |
| &capabilities_attr.attr, |
| &changeset_attr.attr, |
| &virtual_start_attr.attr, |
| &pagesize_attr.attr, |
| &features_attr.attr, |
| NULL |
| }; |
| |
| static struct attribute_group xen_properties_group = { |
| .name = "properties", |
| .attrs = xen_properties_attrs, |
| }; |
| |
| static int __init xen_properties_init(void) |
| { |
| return sysfs_create_group(hypervisor_kobj, &xen_properties_group); |
| } |
| |
| static void xen_properties_destroy(void) |
| { |
| sysfs_remove_group(hypervisor_kobj, &xen_properties_group); |
| } |
| |
| static int __init hyper_sysfs_init(void) |
| { |
| int ret; |
| |
| if (!xen_domain()) |
| return -ENODEV; |
| |
| ret = xen_sysfs_type_init(); |
| if (ret) |
| goto out; |
| ret = xen_sysfs_version_init(); |
| if (ret) |
| goto version_out; |
| ret = xen_compilation_init(); |
| if (ret) |
| goto comp_out; |
| ret = xen_sysfs_uuid_init(); |
| if (ret) |
| goto uuid_out; |
| ret = xen_properties_init(); |
| if (ret) |
| goto prop_out; |
| |
| goto out; |
| |
| prop_out: |
| xen_sysfs_uuid_destroy(); |
| uuid_out: |
| xen_compilation_destroy(); |
| comp_out: |
| xen_sysfs_version_destroy(); |
| version_out: |
| xen_sysfs_type_destroy(); |
| out: |
| return ret; |
| } |
| |
| static void __exit hyper_sysfs_exit(void) |
| { |
| xen_properties_destroy(); |
| xen_compilation_destroy(); |
| xen_sysfs_uuid_destroy(); |
| xen_sysfs_version_destroy(); |
| xen_sysfs_type_destroy(); |
| |
| } |
| module_init(hyper_sysfs_init); |
| module_exit(hyper_sysfs_exit); |
| |
| static ssize_t hyp_sysfs_show(struct kobject *kobj, |
| struct attribute *attr, |
| char *buffer) |
| { |
| struct hyp_sysfs_attr *hyp_attr; |
| hyp_attr = container_of(attr, struct hyp_sysfs_attr, attr); |
| if (hyp_attr->show) |
| return hyp_attr->show(hyp_attr, buffer); |
| return 0; |
| } |
| |
| static ssize_t hyp_sysfs_store(struct kobject *kobj, |
| struct attribute *attr, |
| const char *buffer, |
| size_t len) |
| { |
| struct hyp_sysfs_attr *hyp_attr; |
| hyp_attr = container_of(attr, struct hyp_sysfs_attr, attr); |
| if (hyp_attr->store) |
| return hyp_attr->store(hyp_attr, buffer, len); |
| return 0; |
| } |
| |
| static const struct sysfs_ops hyp_sysfs_ops = { |
| .show = hyp_sysfs_show, |
| .store = hyp_sysfs_store, |
| }; |
| |
| static struct kobj_type hyp_sysfs_kobj_type = { |
| .sysfs_ops = &hyp_sysfs_ops, |
| }; |
| |
| static int __init hypervisor_subsys_init(void) |
| { |
| if (!xen_domain()) |
| return -ENODEV; |
| |
| hypervisor_kobj->ktype = &hyp_sysfs_kobj_type; |
| return 0; |
| } |
| device_initcall(hypervisor_subsys_init); |