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Subject[PATCH] efi, x86: Add a "debug" option to the efi= cmdline
From: Borislav Petkov <bp@suse.de>
Date: Mon, 26 Jan 2015 19:49:59 +0100
Subject: [PATCH] efi, x86: Add a "debug" option to the efi= cmdline

... and hide the memory regions dump behind it. Make it default-off.

Signed-off-by: Borislav Petkov <bp@suse.de>
Link: http://lkml.kernel.org/r/20141209095843.GA3990@pd.tnic
---
arch/x86/platform/efi/efi.c | 5 ++++-
include/linux/efi.h | 1 +
2 files changed, 5 insertions(+), 1 deletion(-)

diff --git a/arch/x86/platform/efi/efi.c b/arch/x86/platform/efi/efi.c
index dbc8627a5cdf..e859d56ce9f8 100644
--- a/arch/x86/platform/efi/efi.c
+++ b/arch/x86/platform/efi/efi.c
@@ -491,7 +491,8 @@ void __init efi_init(void)
if (efi_memmap_init())
return;

- print_efi_memmap();
+ if (efi_enabled(EFI_DBG))
+ print_efi_memmap();
}

void __init efi_late_init(void)
@@ -939,6 +940,8 @@ static int __init arch_parse_efi_cmdline(char *str)
{
if (parse_option_str(str, "old_map"))
set_bit(EFI_OLD_MEMMAP, &efi.flags);
+ if (parse_option_str(str, "debug"))
+ set_bit(EFI_DBG, &efi.flags);

return 0;
}
diff --git a/include/linux/efi.h b/include/linux/efi.h
index 0238d612750e..14cec75d7e74 100644
--- a/include/linux/efi.h
+++ b/include/linux/efi.h
@@ -940,6 +940,7 @@ extern int __init efi_setup_pcdp_console(char *);
#define EFI_64BIT 5 /* Is the firmware 64-bit? */
#define EFI_PARAVIRT 6 /* Access is via a paravirt interface */
#define EFI_ARCH_1 7 /* First arch-specific bit */
+#define EFI_DBG 8 /* Print additional debug info at runtime */

#ifdef CONFIG_EFI
/*
--
2.2.0.33.gc18b867
--
Regards/Gruss,
Boris.

ECO tip #101: Trim your mails when you reply.
--


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