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| author | Daniel Kiper <daniel.kiper@oracle.com> | 2019-11-12 14:46:40 +0100 |
|---|---|---|
| committer | Borislav Petkov <bp@suse.de> | 2019-11-12 16:21:15 +0100 |
| commit | b3c72fc9a78e74161f9d05ef7191706060628f8c (patch) | |
| tree | efcd2356602631b630e8b8af7d9fa5158ba401f4 /arch/x86/include/uapi/asm/bootparam.h | |
| parent | 00cd1c154d565c62ad5e065bf3530f68bdf59490 (diff) | |
| download | linux-stable-b3c72fc9a78e74161f9d05ef7191706060628f8c.tar.gz linux-stable-b3c72fc9a78e74161f9d05ef7191706060628f8c.tar.bz2 linux-stable-b3c72fc9a78e74161f9d05ef7191706060628f8c.zip | |
x86/boot: Introduce setup_indirect
The setup_data is a bit awkward to use for extremely large data objects,
both because the setup_data header has to be adjacent to the data object
and because it has a 32-bit length field. However, it is important that
intermediate stages of the boot process have a way to identify which
chunks of memory are occupied by kernel data. Thus introduce an uniform
way to specify such indirect data as setup_indirect struct and
SETUP_INDIRECT type.
And finally bump setup_header version in arch/x86/boot/header.S.
Suggested-by: H. Peter Anvin (Intel) <hpa@zytor.com>
Signed-off-by: Daniel Kiper <daniel.kiper@oracle.com>
Signed-off-by: Borislav Petkov <bp@suse.de>
Reviewed-by: Ross Philipson <ross.philipson@oracle.com>
Reviewed-by: H. Peter Anvin (Intel) <hpa@zytor.com>
Acked-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Cc: Andy Lutomirski <luto@amacapital.net>
Cc: ard.biesheuvel@linaro.org
Cc: Boris Ostrovsky <boris.ostrovsky@oracle.com>
Cc: dave.hansen@linux.intel.com
Cc: eric.snowberg@oracle.com
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Jonathan Corbet <corbet@lwn.net>
Cc: Juergen Gross <jgross@suse.com>
Cc: kanth.ghatraju@oracle.com
Cc: linux-doc@vger.kernel.org
Cc: linux-efi <linux-efi@vger.kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: rdunlap@infradead.org
Cc: ross.philipson@oracle.com
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: x86-ml <x86@kernel.org>
Cc: xen-devel@lists.xenproject.org
Link: https://lkml.kernel.org/r/20191112134640.16035-4-daniel.kiper@oracle.com
Diffstat (limited to 'arch/x86/include/uapi/asm/bootparam.h')
| -rw-r--r-- | arch/x86/include/uapi/asm/bootparam.h | 16 |
1 files changed, 13 insertions, 3 deletions
diff --git a/arch/x86/include/uapi/asm/bootparam.h b/arch/x86/include/uapi/asm/bootparam.h index dbb41128e5a0..949066b5398a 100644 --- a/arch/x86/include/uapi/asm/bootparam.h +++ b/arch/x86/include/uapi/asm/bootparam.h @@ -2,7 +2,7 @@ #ifndef _ASM_X86_BOOTPARAM_H #define _ASM_X86_BOOTPARAM_H -/* setup_data types */ +/* setup_data/setup_indirect types */ #define SETUP_NONE 0 #define SETUP_E820_EXT 1 #define SETUP_DTB 2 @@ -11,8 +11,10 @@ #define SETUP_APPLE_PROPERTIES 5 #define SETUP_JAILHOUSE 6 -/* max(SETUP_*) */ -#define SETUP_TYPE_MAX SETUP_JAILHOUSE +#define SETUP_INDIRECT (1<<31) + +/* SETUP_INDIRECT | max(SETUP_*) */ +#define SETUP_TYPE_MAX (SETUP_INDIRECT | SETUP_JAILHOUSE) /* ram_size flags */ #define RAMDISK_IMAGE_START_MASK 0x07FF @@ -52,6 +54,14 @@ struct setup_data { __u8 data[0]; }; +/* extensible setup indirect data node */ +struct setup_indirect { + __u32 type; + __u32 reserved; /* Reserved, must be set to zero. */ + __u64 len; + __u64 addr; +}; + struct setup_header { __u8 setup_sects; __u16 root_flags; |