mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-21 09:24:37 +07:00
e66c3209c7
This patch moves the files related to page table dump in a dedicated subdirectory. The purpose is to clean a bit arch/powerpc/mm by regrouping multiple files handling a dedicated function. Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr> [mpe: Shorten the file names while we're at it] Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
65 lines
1.4 KiB
C
65 lines
1.4 KiB
C
// SPDX-License-Identifier: GPL-2.0+
|
|
/*
|
|
* Copyright 2018, Christophe Leroy CS S.I.
|
|
* <christophe.leroy@c-s.fr>
|
|
*
|
|
* This dumps the content of Segment Registers
|
|
*/
|
|
|
|
#include <asm/debugfs.h>
|
|
|
|
static void seg_show(struct seq_file *m, int i)
|
|
{
|
|
u32 val = mfsrin(i << 28);
|
|
|
|
seq_printf(m, "0x%01x0000000-0x%01xfffffff ", i, i);
|
|
seq_printf(m, "Kern key %d ", (val >> 30) & 1);
|
|
seq_printf(m, "User key %d ", (val >> 29) & 1);
|
|
if (val & 0x80000000) {
|
|
seq_printf(m, "Device 0x%03x", (val >> 20) & 0x1ff);
|
|
seq_printf(m, "-0x%05x", val & 0xfffff);
|
|
} else {
|
|
if (val & 0x10000000)
|
|
seq_puts(m, "No Exec ");
|
|
seq_printf(m, "VSID 0x%06x", val & 0xffffff);
|
|
}
|
|
seq_puts(m, "\n");
|
|
}
|
|
|
|
static int sr_show(struct seq_file *m, void *v)
|
|
{
|
|
int i;
|
|
|
|
seq_puts(m, "---[ User Segments ]---\n");
|
|
for (i = 0; i < TASK_SIZE >> 28; i++)
|
|
seg_show(m, i);
|
|
|
|
seq_puts(m, "\n---[ Kernel Segments ]---\n");
|
|
for (; i < 16; i++)
|
|
seg_show(m, i);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int sr_open(struct inode *inode, struct file *file)
|
|
{
|
|
return single_open(file, sr_show, NULL);
|
|
}
|
|
|
|
static const struct file_operations sr_fops = {
|
|
.open = sr_open,
|
|
.read = seq_read,
|
|
.llseek = seq_lseek,
|
|
.release = single_release,
|
|
};
|
|
|
|
static int __init sr_init(void)
|
|
{
|
|
struct dentry *debugfs_file;
|
|
|
|
debugfs_file = debugfs_create_file("segment_registers", 0400,
|
|
powerpc_debugfs_root, NULL, &sr_fops);
|
|
return debugfs_file ? 0 : -ENOMEM;
|
|
}
|
|
device_initcall(sr_init);
|