mirror of
https://github.com/torvalds/linux.git
synced 2026-03-08 00:44:31 +01:00
bf4afc53b7
This was done entirely with mindless brute force, using
git grep -l '\<k[vmz]*alloc_objs*(.*, GFP_KERNEL)' |
xargs sed -i 's/\(alloc_objs*(.*\), GFP_KERNEL)/\1)/'
to convert the new alloc_obj() users that had a simple GFP_KERNEL
argument to just drop that argument.
Note that due to the extreme simplicity of the scripting, any slightly
more complex cases spread over multiple lines would not be triggered:
they definitely exist, but this covers the vast bulk of the cases, and
the resulting diff is also then easier to check automatically.
For the same reason the 'flex' versions will be done as a separate
conversion.
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
670 lines
14 KiB
C
670 lines
14 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
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/*
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* copyright (c) 2006 IBM Corporation
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* Authored by: Mike D. Day <ncmike@us.ibm.com>
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*/
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#include <linux/slab.h>
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#include <linux/kernel.h>
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#include <linux/init.h>
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#include <linux/kobject.h>
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#include <linux/err.h>
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#include <asm/xen/hypervisor.h>
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#include <asm/xen/hypercall.h>
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#include <xen/xen.h>
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#include <xen/xenbus.h>
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#include <xen/interface/xen.h>
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#include <xen/interface/version.h>
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#ifdef CONFIG_XEN_HAVE_VPMU
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#include <xen/interface/xenpmu.h>
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#endif
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#define HYPERVISOR_ATTR_RO(_name) \
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static struct hyp_sysfs_attr _name##_attr = __ATTR_RO(_name)
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#define HYPERVISOR_ATTR_RW(_name) \
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static struct hyp_sysfs_attr _name##_attr = __ATTR_RW(_name)
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struct hyp_sysfs_attr {
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struct attribute attr;
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ssize_t (*show)(struct hyp_sysfs_attr *, char *);
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ssize_t (*store)(struct hyp_sysfs_attr *, const char *, size_t);
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union {
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void *hyp_attr_data;
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unsigned long hyp_attr_value;
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};
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};
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static ssize_t type_show(struct hyp_sysfs_attr *attr, char *buffer)
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{
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return sprintf(buffer, "xen\n");
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}
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HYPERVISOR_ATTR_RO(type);
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static int __init xen_sysfs_type_init(void)
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{
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return sysfs_create_file(hypervisor_kobj, &type_attr.attr);
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}
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static ssize_t guest_type_show(struct hyp_sysfs_attr *attr, char *buffer)
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{
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const char *type;
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switch (xen_domain_type) {
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case XEN_NATIVE:
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/* ARM only. */
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type = "Xen";
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break;
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case XEN_PV_DOMAIN:
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type = "PV";
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break;
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case XEN_HVM_DOMAIN:
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type = xen_pvh_domain() ? "PVH" : "HVM";
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break;
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default:
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return -EINVAL;
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}
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return sprintf(buffer, "%s\n", type);
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}
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HYPERVISOR_ATTR_RO(guest_type);
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static int __init xen_sysfs_guest_type_init(void)
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{
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return sysfs_create_file(hypervisor_kobj, &guest_type_attr.attr);
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}
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/* xen version attributes */
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static ssize_t major_show(struct hyp_sysfs_attr *attr, char *buffer)
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{
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int version = HYPERVISOR_xen_version(XENVER_version, NULL);
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if (version)
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return sprintf(buffer, "%d\n", version >> 16);
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return -ENODEV;
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}
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HYPERVISOR_ATTR_RO(major);
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static ssize_t minor_show(struct hyp_sysfs_attr *attr, char *buffer)
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{
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int version = HYPERVISOR_xen_version(XENVER_version, NULL);
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if (version)
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return sprintf(buffer, "%d\n", version & 0xff);
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return -ENODEV;
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}
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HYPERVISOR_ATTR_RO(minor);
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static ssize_t extra_show(struct hyp_sysfs_attr *attr, char *buffer)
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{
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int ret = -ENOMEM;
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char *extra;
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extra = kmalloc(XEN_EXTRAVERSION_LEN, GFP_KERNEL);
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if (extra) {
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ret = HYPERVISOR_xen_version(XENVER_extraversion, extra);
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if (!ret)
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ret = sprintf(buffer, "%s\n", extra);
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kfree(extra);
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}
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return ret;
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}
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HYPERVISOR_ATTR_RO(extra);
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static struct attribute *version_attrs[] = {
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&major_attr.attr,
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&minor_attr.attr,
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&extra_attr.attr,
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NULL
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};
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static const struct attribute_group version_group = {
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.name = "version",
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.attrs = version_attrs,
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};
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static int __init xen_sysfs_version_init(void)
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{
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return sysfs_create_group(hypervisor_kobj, &version_group);
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}
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/* UUID */
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static ssize_t uuid_show_fallback(struct hyp_sysfs_attr *attr, char *buffer)
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{
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char *vm, *val;
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int ret;
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extern int xenstored_ready;
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if (!xenstored_ready)
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return -EBUSY;
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vm = xenbus_read(XBT_NIL, "vm", "", NULL);
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if (IS_ERR(vm))
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return PTR_ERR(vm);
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val = xenbus_read(XBT_NIL, vm, "uuid", NULL);
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kfree(vm);
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if (IS_ERR(val))
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return PTR_ERR(val);
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ret = sprintf(buffer, "%s\n", val);
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kfree(val);
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return ret;
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}
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static ssize_t uuid_show(struct hyp_sysfs_attr *attr, char *buffer)
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{
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xen_domain_handle_t uuid;
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int ret;
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ret = HYPERVISOR_xen_version(XENVER_guest_handle, uuid);
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if (ret)
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return uuid_show_fallback(attr, buffer);
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ret = sprintf(buffer, "%pU\n", uuid);
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return ret;
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}
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HYPERVISOR_ATTR_RO(uuid);
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static int __init xen_sysfs_uuid_init(void)
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{
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return sysfs_create_file(hypervisor_kobj, &uuid_attr.attr);
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}
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/* xen compilation attributes */
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static ssize_t compiler_show(struct hyp_sysfs_attr *attr, char *buffer)
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{
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int ret = -ENOMEM;
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struct xen_compile_info *info;
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info = kmalloc_obj(struct xen_compile_info);
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if (info) {
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ret = HYPERVISOR_xen_version(XENVER_compile_info, info);
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if (!ret)
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ret = sprintf(buffer, "%s\n", info->compiler);
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kfree(info);
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}
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return ret;
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}
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HYPERVISOR_ATTR_RO(compiler);
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static ssize_t compiled_by_show(struct hyp_sysfs_attr *attr, char *buffer)
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{
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int ret = -ENOMEM;
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struct xen_compile_info *info;
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info = kmalloc_obj(struct xen_compile_info);
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if (info) {
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ret = HYPERVISOR_xen_version(XENVER_compile_info, info);
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if (!ret)
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ret = sprintf(buffer, "%s\n", info->compile_by);
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kfree(info);
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}
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return ret;
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}
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HYPERVISOR_ATTR_RO(compiled_by);
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static ssize_t compile_date_show(struct hyp_sysfs_attr *attr, char *buffer)
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{
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int ret = -ENOMEM;
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struct xen_compile_info *info;
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info = kmalloc_obj(struct xen_compile_info);
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if (info) {
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ret = HYPERVISOR_xen_version(XENVER_compile_info, info);
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if (!ret)
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ret = sprintf(buffer, "%s\n", info->compile_date);
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kfree(info);
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}
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return ret;
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}
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HYPERVISOR_ATTR_RO(compile_date);
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static struct attribute *xen_compile_attrs[] = {
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&compiler_attr.attr,
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&compiled_by_attr.attr,
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&compile_date_attr.attr,
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NULL
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};
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static const struct attribute_group xen_compilation_group = {
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.name = "compilation",
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.attrs = xen_compile_attrs,
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};
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static int __init xen_sysfs_compilation_init(void)
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{
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return sysfs_create_group(hypervisor_kobj, &xen_compilation_group);
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}
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/* xen properties info */
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static ssize_t capabilities_show(struct hyp_sysfs_attr *attr, char *buffer)
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{
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int ret = -ENOMEM;
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char *caps;
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caps = kmalloc(XEN_CAPABILITIES_INFO_LEN, GFP_KERNEL);
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if (caps) {
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ret = HYPERVISOR_xen_version(XENVER_capabilities, caps);
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if (!ret)
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ret = sprintf(buffer, "%s\n", caps);
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kfree(caps);
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}
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return ret;
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}
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HYPERVISOR_ATTR_RO(capabilities);
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static ssize_t changeset_show(struct hyp_sysfs_attr *attr, char *buffer)
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{
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int ret = -ENOMEM;
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char *cset;
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cset = kmalloc(XEN_CHANGESET_INFO_LEN, GFP_KERNEL);
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if (cset) {
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ret = HYPERVISOR_xen_version(XENVER_changeset, cset);
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if (!ret)
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ret = sprintf(buffer, "%s\n", cset);
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kfree(cset);
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}
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return ret;
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}
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HYPERVISOR_ATTR_RO(changeset);
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static ssize_t virtual_start_show(struct hyp_sysfs_attr *attr, char *buffer)
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{
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int ret = -ENOMEM;
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struct xen_platform_parameters *parms;
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parms = kmalloc_obj(struct xen_platform_parameters);
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if (parms) {
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ret = HYPERVISOR_xen_version(XENVER_platform_parameters,
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parms);
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if (!ret)
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ret = sprintf(buffer, "%"PRI_xen_ulong"\n",
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parms->virt_start);
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kfree(parms);
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}
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return ret;
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}
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HYPERVISOR_ATTR_RO(virtual_start);
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static ssize_t pagesize_show(struct hyp_sysfs_attr *attr, char *buffer)
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{
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int ret;
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ret = HYPERVISOR_xen_version(XENVER_pagesize, NULL);
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if (ret > 0)
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ret = sprintf(buffer, "%x\n", ret);
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return ret;
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}
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HYPERVISOR_ATTR_RO(pagesize);
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static ssize_t xen_feature_show(int index, char *buffer)
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{
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ssize_t ret;
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struct xen_feature_info info;
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info.submap_idx = index;
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ret = HYPERVISOR_xen_version(XENVER_get_features, &info);
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if (!ret)
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ret = sprintf(buffer, "%08x", info.submap);
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return ret;
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}
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static ssize_t features_show(struct hyp_sysfs_attr *attr, char *buffer)
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{
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ssize_t len;
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int i;
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len = 0;
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for (i = XENFEAT_NR_SUBMAPS-1; i >= 0; i--) {
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int ret = xen_feature_show(i, buffer + len);
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if (ret < 0) {
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if (len == 0)
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len = ret;
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break;
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}
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len += ret;
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}
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if (len > 0)
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buffer[len++] = '\n';
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return len;
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}
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HYPERVISOR_ATTR_RO(features);
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static ssize_t buildid_show(struct hyp_sysfs_attr *attr, char *buffer)
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{
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ssize_t ret;
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struct xen_build_id *buildid;
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ret = HYPERVISOR_xen_version(XENVER_build_id, NULL);
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if (ret < 0) {
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if (ret == -EPERM)
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ret = sprintf(buffer, "<denied>");
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return ret;
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}
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buildid = kmalloc(sizeof(*buildid) + ret, GFP_KERNEL);
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if (!buildid)
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return -ENOMEM;
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buildid->len = ret;
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ret = HYPERVISOR_xen_version(XENVER_build_id, buildid);
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if (ret > 0)
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ret = sprintf(buffer, "%s", buildid->buf);
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kfree(buildid);
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return ret;
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}
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HYPERVISOR_ATTR_RO(buildid);
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static struct attribute *xen_properties_attrs[] = {
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&capabilities_attr.attr,
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&changeset_attr.attr,
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&virtual_start_attr.attr,
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&pagesize_attr.attr,
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&features_attr.attr,
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&buildid_attr.attr,
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NULL
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};
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static const struct attribute_group xen_properties_group = {
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.name = "properties",
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.attrs = xen_properties_attrs,
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};
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static int __init xen_sysfs_properties_init(void)
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{
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return sysfs_create_group(hypervisor_kobj, &xen_properties_group);
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}
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#define FLAG_UNAME "unknown"
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#define FLAG_UNAME_FMT FLAG_UNAME "%02u"
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#define FLAG_UNAME_MAX sizeof(FLAG_UNAME "XX")
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#define FLAG_COUNT (sizeof(xen_start_flags) * BITS_PER_BYTE)
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static_assert(sizeof(xen_start_flags) <=
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sizeof_field(struct hyp_sysfs_attr, hyp_attr_value));
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static ssize_t flag_show(struct hyp_sysfs_attr *attr, char *buffer)
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{
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char *p = buffer;
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*p++ = '0' + ((xen_start_flags & attr->hyp_attr_value) != 0);
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*p++ = '\n';
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return p - buffer;
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}
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#define FLAG_NODE(flag, node) \
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[ilog2(flag)] = { \
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.attr = { .name = #node, .mode = 0444 },\
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.show = flag_show, \
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.hyp_attr_value = flag \
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}
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/*
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* Add new, known flags here. No other changes are required, but
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* note that each known flag wastes one entry in flag_unames[].
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* The code/complexity machinations to avoid this isn't worth it
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* for a few entries, but keep it in mind.
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*/
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static struct hyp_sysfs_attr flag_attrs[FLAG_COUNT] = {
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FLAG_NODE(SIF_PRIVILEGED, privileged),
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FLAG_NODE(SIF_INITDOMAIN, initdomain)
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};
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static struct attribute_group xen_flags_group = {
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.name = "start_flags",
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.attrs = (struct attribute *[FLAG_COUNT + 1]){}
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};
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static char flag_unames[FLAG_COUNT][FLAG_UNAME_MAX];
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static int __init xen_sysfs_flags_init(void)
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{
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for (unsigned fnum = 0; fnum != FLAG_COUNT; fnum++) {
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if (likely(flag_attrs[fnum].attr.name == NULL)) {
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sprintf(flag_unames[fnum], FLAG_UNAME_FMT, fnum);
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flag_attrs[fnum].attr.name = flag_unames[fnum];
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flag_attrs[fnum].attr.mode = 0444;
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flag_attrs[fnum].show = flag_show;
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flag_attrs[fnum].hyp_attr_value = 1 << fnum;
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}
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xen_flags_group.attrs[fnum] = &flag_attrs[fnum].attr;
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}
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return sysfs_create_group(hypervisor_kobj, &xen_flags_group);
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}
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#ifdef CONFIG_XEN_HAVE_VPMU
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struct pmu_mode {
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const char *name;
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uint32_t mode;
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};
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static struct pmu_mode pmu_modes[] = {
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{"off", XENPMU_MODE_OFF},
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{"self", XENPMU_MODE_SELF},
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{"hv", XENPMU_MODE_HV},
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{"all", XENPMU_MODE_ALL}
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};
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static ssize_t pmu_mode_store(struct hyp_sysfs_attr *attr,
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const char *buffer, size_t len)
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{
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int ret;
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struct xen_pmu_params xp;
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int i;
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for (i = 0; i < ARRAY_SIZE(pmu_modes); i++) {
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if (strncmp(buffer, pmu_modes[i].name, len - 1) == 0) {
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xp.val = pmu_modes[i].mode;
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break;
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}
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}
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if (i == ARRAY_SIZE(pmu_modes))
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return -EINVAL;
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xp.version.maj = XENPMU_VER_MAJ;
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xp.version.min = XENPMU_VER_MIN;
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ret = HYPERVISOR_xenpmu_op(XENPMU_mode_set, &xp);
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if (ret)
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return ret;
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return len;
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}
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static ssize_t pmu_mode_show(struct hyp_sysfs_attr *attr, char *buffer)
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{
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int ret;
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struct xen_pmu_params xp;
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int i;
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uint32_t mode;
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xp.version.maj = XENPMU_VER_MAJ;
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xp.version.min = XENPMU_VER_MIN;
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ret = HYPERVISOR_xenpmu_op(XENPMU_mode_get, &xp);
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if (ret)
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return ret;
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mode = (uint32_t)xp.val;
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for (i = 0; i < ARRAY_SIZE(pmu_modes); i++) {
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if (mode == pmu_modes[i].mode)
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return sprintf(buffer, "%s\n", pmu_modes[i].name);
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}
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return -EINVAL;
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}
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HYPERVISOR_ATTR_RW(pmu_mode);
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static ssize_t pmu_features_store(struct hyp_sysfs_attr *attr,
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const char *buffer, size_t len)
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{
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int ret;
|
|
uint32_t features;
|
|
struct xen_pmu_params xp;
|
|
|
|
ret = kstrtou32(buffer, 0, &features);
|
|
if (ret)
|
|
return ret;
|
|
|
|
xp.val = features;
|
|
xp.version.maj = XENPMU_VER_MAJ;
|
|
xp.version.min = XENPMU_VER_MIN;
|
|
ret = HYPERVISOR_xenpmu_op(XENPMU_feature_set, &xp);
|
|
if (ret)
|
|
return ret;
|
|
|
|
return len;
|
|
}
|
|
|
|
static ssize_t pmu_features_show(struct hyp_sysfs_attr *attr, char *buffer)
|
|
{
|
|
int ret;
|
|
struct xen_pmu_params xp;
|
|
|
|
xp.version.maj = XENPMU_VER_MAJ;
|
|
xp.version.min = XENPMU_VER_MIN;
|
|
ret = HYPERVISOR_xenpmu_op(XENPMU_feature_get, &xp);
|
|
if (ret)
|
|
return ret;
|
|
|
|
return sprintf(buffer, "0x%x\n", (uint32_t)xp.val);
|
|
}
|
|
HYPERVISOR_ATTR_RW(pmu_features);
|
|
|
|
static struct attribute *xen_pmu_attrs[] = {
|
|
&pmu_mode_attr.attr,
|
|
&pmu_features_attr.attr,
|
|
NULL
|
|
};
|
|
|
|
static const struct attribute_group xen_pmu_group = {
|
|
.name = "pmu",
|
|
.attrs = xen_pmu_attrs,
|
|
};
|
|
|
|
static int __init xen_sysfs_pmu_init(void)
|
|
{
|
|
return sysfs_create_group(hypervisor_kobj, &xen_pmu_group);
|
|
}
|
|
#endif
|
|
|
|
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_guest_type_init();
|
|
if (ret)
|
|
goto guest_type_out;
|
|
ret = xen_sysfs_version_init();
|
|
if (ret)
|
|
goto version_out;
|
|
ret = xen_sysfs_compilation_init();
|
|
if (ret)
|
|
goto comp_out;
|
|
ret = xen_sysfs_uuid_init();
|
|
if (ret)
|
|
goto uuid_out;
|
|
ret = xen_sysfs_properties_init();
|
|
if (ret)
|
|
goto prop_out;
|
|
ret = xen_sysfs_flags_init();
|
|
if (ret)
|
|
goto flags_out;
|
|
#ifdef CONFIG_XEN_HAVE_VPMU
|
|
if (xen_initial_domain()) {
|
|
ret = xen_sysfs_pmu_init();
|
|
if (ret) {
|
|
sysfs_remove_group(hypervisor_kobj, &xen_flags_group);
|
|
goto flags_out;
|
|
}
|
|
}
|
|
#endif
|
|
goto out;
|
|
|
|
flags_out:
|
|
sysfs_remove_group(hypervisor_kobj, &xen_properties_group);
|
|
prop_out:
|
|
sysfs_remove_file(hypervisor_kobj, &uuid_attr.attr);
|
|
uuid_out:
|
|
sysfs_remove_group(hypervisor_kobj, &xen_compilation_group);
|
|
comp_out:
|
|
sysfs_remove_group(hypervisor_kobj, &version_group);
|
|
version_out:
|
|
sysfs_remove_file(hypervisor_kobj, &guest_type_attr.attr);
|
|
guest_type_out:
|
|
sysfs_remove_file(hypervisor_kobj, &type_attr.attr);
|
|
out:
|
|
return ret;
|
|
}
|
|
device_initcall(hyper_sysfs_init);
|
|
|
|
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 const 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);
|