diff options
| -rw-r--r-- | arch/x86/mm/debug_pagetables.c | 32 | ||||
| -rw-r--r-- | arch/x86/platform/efi/efi_64.c | 4 |
2 files changed, 35 insertions, 1 deletions
diff --git a/arch/x86/mm/debug_pagetables.c b/arch/x86/mm/debug_pagetables.c index 421f2664ffa0..51a6f92da2bf 100644 --- a/arch/x86/mm/debug_pagetables.c +++ b/arch/x86/mm/debug_pagetables.c @@ -72,6 +72,31 @@ static const struct file_operations ptdump_curusr_fops = { }; #endif +#if defined(CONFIG_EFI) && defined(CONFIG_X86_64) +extern pgd_t *efi_pgd; +static struct dentry *pe_efi; + +static int ptdump_show_efi(struct seq_file *m, void *v) +{ + if (efi_pgd) + ptdump_walk_pgd_level_debugfs(m, efi_pgd, false); + return 0; +} + +static int ptdump_open_efi(struct inode *inode, struct file *filp) +{ + return single_open(filp, ptdump_show_efi, NULL); +} + +static const struct file_operations ptdump_efi_fops = { + .owner = THIS_MODULE, + .open = ptdump_open_efi, + .read = seq_read, + .llseek = seq_lseek, + .release = single_release, +}; +#endif + static struct dentry *dir, *pe_knl, *pe_curknl; static int __init pt_dump_debug_init(void) @@ -96,6 +121,13 @@ static int __init pt_dump_debug_init(void) if (!pe_curusr) goto err; #endif + +#if defined(CONFIG_EFI) && defined(CONFIG_X86_64) + pe_efi = debugfs_create_file("efi", 0400, dir, NULL, &ptdump_efi_fops); + if (!pe_efi) + goto err; +#endif + return 0; err: debugfs_remove_recursive(dir); diff --git a/arch/x86/platform/efi/efi_64.c b/arch/x86/platform/efi/efi_64.c index c310a8284358..780460aa5ea5 100644 --- a/arch/x86/platform/efi/efi_64.c +++ b/arch/x86/platform/efi/efi_64.c @@ -27,6 +27,7 @@ #include <linux/ioport.h> #include <linux/mc146818rtc.h> #include <linux/efi.h> +#include <linux/export.h> #include <linux/uaccess.h> #include <linux/io.h> #include <linux/reboot.h> @@ -190,7 +191,8 @@ void __init efi_call_phys_epilog(pgd_t *save_pgd) early_code_mapping_set_exec(0); } -static pgd_t *efi_pgd; +pgd_t *efi_pgd; +EXPORT_SYMBOL_GPL(efi_pgd); /* * We need our own copy of the higher levels of the page tables |