On July 4, 2019 9:36:12 AM PDT, Daniel Kiper <daniel.kiper@xxxxxxxxxx> wrote: >This field contains maximal allowed type for setup_data and >setup_indirect structs. > >And finally bump setup_header version in arch/x86/boot/header.S. > >Suggested-by: H. Peter Anvin <hpa@xxxxxxxxx> >Signed-off-by: Daniel Kiper <daniel.kiper@xxxxxxxxxx> >Reviewed-by: Ross Philipson <ross.philipson@xxxxxxxxxx> >Reviewed-by: Eric Snowberg <eric.snowberg@xxxxxxxxxx> >--- > Documentation/x86/boot.rst | 10 +++++++++- > arch/x86/boot/compressed/kernel_info.S | 4 ++++ > arch/x86/boot/header.S | 2 +- > arch/x86/include/uapi/asm/bootparam.h | 3 +++ > 4 files changed, 17 insertions(+), 2 deletions(-) > >diff --git a/Documentation/x86/boot.rst b/Documentation/x86/boot.rst >index 23d3726d54fc..63609fd0517f 100644 >--- a/Documentation/x86/boot.rst >+++ b/Documentation/x86/boot.rst >@@ -73,7 +73,8 @@ 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 5.3) Added the kernel_info and setup_indirect. >+Protocol 2.15: (Kernel 5.3) Added the kernel_info, >kernel_info.setup_type_max >+ and setup_indirect. >============= ============================================================ > > .. note:: >@@ -980,6 +981,13 @@ Offset/size: 0x0004/4 >This field contains the size of the kernel_info including >kernel_info.header. >It should be used by the boot loader to detect supported fields in the >kernel_info. > >+============ ============== >+Field name: setup_type_max >+Offset/size: 0x0008/4 >+============ ============== >+ >+ This field contains maximal allowed type for setup_data and >setup_indirect structs. >+ > > The Image Checksum > ================== >diff --git a/arch/x86/boot/compressed/kernel_info.S >b/arch/x86/boot/compressed/kernel_info.S >index 3f1cb301b9ff..2f28aabf6558 100644 >--- a/arch/x86/boot/compressed/kernel_info.S >+++ b/arch/x86/boot/compressed/kernel_info.S >@@ -1,5 +1,7 @@ > /* SPDX-License-Identifier: GPL-2.0 */ > >+#include <asm/bootparam.h> >+ > .section ".rodata.kernel_info", "a" > > .global kernel_info >@@ -9,4 +11,6 @@ kernel_info: > .ascii "InfO" > /* Size. */ > .long kernel_info_end - kernel_info >+ /* Maximal allowed type for setup_data and setup_indirect >structs. */ >+ .long SETUP_TYPE_MAX > kernel_info_end: >diff --git a/arch/x86/boot/header.S b/arch/x86/boot/header.S >index ec6a25a43148..893a456663ab 100644 >--- a/arch/x86/boot/header.S >+++ b/arch/x86/boot/header.S >@@ -300,7 +300,7 @@ _start: > # Part 2 of the header, from the old setup.S > > .ascii "HdrS" # header signature >- .word 0x020d # header version number (>= 0x0105) >+ .word 0x020f # header version number (>= 0x0105) > # or else old loadlin-1.5 will fail) > .globl realmode_swtch > realmode_swtch: .word 0, 0 # default_switch, SETUPSEG >diff --git a/arch/x86/include/uapi/asm/bootparam.h >b/arch/x86/include/uapi/asm/bootparam.h >index aaaa17fa6ad6..2ba870dae6f3 100644 >--- a/arch/x86/include/uapi/asm/bootparam.h >+++ b/arch/x86/include/uapi/asm/bootparam.h >@@ -12,6 +12,9 @@ > #define SETUP_JAILHOUSE 6 > #define SETUP_INDIRECT 7 > >+/* max(SETUP_*) */ >+#define SETUP_TYPE_MAX SETUP_INDIRECT >+ > /* ram_size flags */ > #define RAMDISK_IMAGE_START_MASK 0x07FF > #define RAMDISK_PROMPT_FLAG 0x8000 Bump the version number and add setup_max before adding the indirect stuff. That will nicely double as at the very least a first-order validity check. -- Sent from my Android device with K-9 Mail. Please excuse my brevity.
