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x86/boot: Introduce kernel_info.setup_type_max

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This field contains maximal allowed type for setup_data.

Do not bump setup_header version in arch/x86/boot/header.S because it
will be followed by additional changes coming into the Linux/x86 boot
protocol.

Suggested-by: H. Peter Anvin (Intel) <[email protected]>
Signed-off-by: Daniel Kiper <[email protected]>
Signed-off-by: Borislav Petkov <[email protected]>
Reviewed-by: Konrad Rzeszutek Wilk <[email protected]>
Reviewed-by: Ross Philipson <[email protected]>
Reviewed-by: H. Peter Anvin (Intel) <[email protected]>
Cc: Andy Lutomirski <[email protected]>
Cc: [email protected]
Cc: Boris Ostrovsky <[email protected]>
Cc: [email protected]
Cc: [email protected]
Cc: Ingo Molnar <[email protected]>
Cc: Jonathan Corbet <[email protected]>
Cc: Juergen Gross <[email protected]>
Cc: [email protected]
Cc: [email protected]
Cc: linux-efi <[email protected]>
Cc: Peter Zijlstra <[email protected]>
Cc: [email protected]
Cc: [email protected]
Cc: Thomas Gleixner <[email protected]>
Cc: x86-ml <[email protected]>
Cc: [email protected]
Link: https://lkml.kernel.org/r/[email protected]
This commit is contained in:
Daniel Kiper authored and Borislav Petkov committed 2019-11-12 16:16:54 +01:00
1 parent 2c33c27fd6
commit 00cd1c154d
3 files changed
+16 -1
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Documentation/x86/boot.rst
+8 -1
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@@ -73,7 +73,7 @@ Protocol 2.14: BURNT BY INCORRECT COMMIT ae7e1238e68f2a472a125673ab506d49158c188
(x86/boot: Add ACPI RSDP address to setup_header)
DO NOT USE!!! ASSUME SAME AS 2.13.
Protocol 2.15: (Kernel 5.5) Added the kernel_info.
Protocol 2.15: (Kernel 5.5) Added the kernel_info and kernel_info.setup_type_max.
============= ============================================================
.. note::
@@ -981,6 +981,13 @@ Offset/size: 0x0008/4
This field contains the size of the kernel_info including kernel_info.header
and kernel_info.kernel_info_var_len_data.
============ ==============
Field name: setup_type_max
Offset/size: 0x000c/4
============ ==============
This field contains maximal allowed type for setup_data.
The Image Checksum
==================
arch/x86/boot/compressed/kernel_info.S
+5
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@@ -1,5 +1,7 @@
/* SPDX-License-Identifier: GPL-2.0 */
#include <asm/bootparam.h>
.section ".rodata.kernel_info", "a"
.global kernel_info
@@ -12,6 +14,9 @@ kernel_info:
/* Size total. */
.long kernel_info_end - kernel_info
/* Maximal allowed type for setup_data. */
.long SETUP_TYPE_MAX
kernel_info_var_len_data:
/* Empty for time being... */
kernel_info_end:
arch/x86/include/uapi/asm/bootparam.h
+3
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@@ -11,6 +11,9 @@
#define SETUP_APPLE_PROPERTIES 5
#define SETUP_JAILHOUSE 6
/* max(SETUP_*) */
#define SETUP_TYPE_MAX SETUP_JAILHOUSE
/* ram_size flags */
#define RAMDISK_IMAGE_START_MASK 0x07FF
#define RAMDISK_PROMPT_FLAG 0x8000