threeeye
bc1d038eac
Squashed backup commit (no shallow-clone history issues) of xiaomi-mt6833-dev/kernel_xiaomi_mt6833 (lineage-23.2 branch, upstream commit 9eece662e) plus all fixes applied to get everpal_defconfig building clean against a modern (GCC 15.2.0) toolchain -- see the previous commit message on the lineage-23.2 branch (also in this repo history is not available here since this is a squashed snapshot; full incremental history lives in the local DL380 checkout and the upstream GitHub remote). Upstream: https://github.com/xiaomi-mt6833-dev/kernel_xiaomi_mt6833 (lineage-23.2)
70 lines
1.5 KiB
C
70 lines
1.5 KiB
C
// SPDX-License-Identifier: GPL-2.0
|
|
#include <linux/slab.h>
|
|
#include <linux/types.h>
|
|
#include <linux/mm.h>
|
|
#include <linux/fs.h>
|
|
|
|
#include <xen/page.h>
|
|
#include <xen/xenbus.h>
|
|
|
|
#include "xenfs.h"
|
|
|
|
static ssize_t xsd_read(struct file *file, char __user *buf,
|
|
size_t size, loff_t *off)
|
|
{
|
|
const char *str = (const char *)file->private_data;
|
|
return simple_read_from_buffer(buf, size, off, str, strlen(str));
|
|
}
|
|
|
|
static int xsd_release(struct inode *inode, struct file *file)
|
|
{
|
|
kfree(file->private_data);
|
|
return 0;
|
|
}
|
|
|
|
static int xsd_kva_open(struct inode *inode, struct file *file)
|
|
{
|
|
file->private_data = (void *)kasprintf(GFP_KERNEL, "0x%p",
|
|
xen_store_interface);
|
|
if (!file->private_data)
|
|
return -ENOMEM;
|
|
return 0;
|
|
}
|
|
|
|
static int xsd_kva_mmap(struct file *file, struct vm_area_struct *vma)
|
|
{
|
|
size_t size = vma->vm_end - vma->vm_start;
|
|
|
|
if ((size > PAGE_SIZE) || (vma->vm_pgoff != 0))
|
|
return -EINVAL;
|
|
|
|
if (remap_pfn_range(vma, vma->vm_start,
|
|
virt_to_pfn(xen_store_interface),
|
|
size, vma->vm_page_prot))
|
|
return -EAGAIN;
|
|
|
|
return 0;
|
|
}
|
|
|
|
const struct file_operations xsd_kva_file_ops = {
|
|
.open = xsd_kva_open,
|
|
.mmap = xsd_kva_mmap,
|
|
.read = xsd_read,
|
|
.release = xsd_release,
|
|
};
|
|
|
|
static int xsd_port_open(struct inode *inode, struct file *file)
|
|
{
|
|
file->private_data = (void *)kasprintf(GFP_KERNEL, "%d",
|
|
xen_store_evtchn);
|
|
if (!file->private_data)
|
|
return -ENOMEM;
|
|
return 0;
|
|
}
|
|
|
|
const struct file_operations xsd_port_file_ops = {
|
|
.open = xsd_port_open,
|
|
.read = xsd_read,
|
|
.release = xsd_release,
|
|
};
|