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4fb69cc456
This patch refactors the arm page table dumping code, so multiple tables may be registered with the framework. This patch refers below commits of arm64. (4674fdb9f1("arm64: mm: dump: make page table dumping reusable")) (4ddb9bf833("arm64: dump: Make ptdump debugfs a separate option")) Reviewed-by: Kees Cook <keescook@chromium.org> Tested-by: Laura Abbott <labbott@redhat.com> Reviewed-by: Laura Abbott <labbott@redhat.com> Signed-off-by: Jinbum Park <jinb.park7@gmail.com> Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk>
35 lines
718 B
C
35 lines
718 B
C
// SPDX-License-Identifier: GPL-2.0
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#include <linux/debugfs.h>
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#include <linux/seq_file.h>
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#include <asm/ptdump.h>
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static int ptdump_show(struct seq_file *m, void *v)
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{
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struct ptdump_info *info = m->private;
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ptdump_walk_pgd(m, info);
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return 0;
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}
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static int ptdump_open(struct inode *inode, struct file *file)
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{
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return single_open(file, ptdump_show, inode->i_private);
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}
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static const struct file_operations ptdump_fops = {
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.open = ptdump_open,
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.read = seq_read,
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.llseek = seq_lseek,
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.release = single_release,
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};
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int ptdump_debugfs_register(struct ptdump_info *info, const char *name)
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{
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struct dentry *pe;
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pe = debugfs_create_file(name, 0400, NULL, info, &ptdump_fops);
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return pe ? 0 : -ENOMEM;
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}
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