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| author | Chao Fan <fanc.fnst@cn.fujitsu.com> | 2019-01-23 19:08:45 +0800 |
|---|---|---|
| committer | Borislav Petkov <bp@suse.de> | 2019-02-01 11:52:54 +0100 |
| commit | 3c98e71b42a7d0c14639ccb565ea315f3c887f92 (patch) | |
| tree | bc8b355dd41d9036fb2e67c2126cf24c3435c7cf /arch/x86/boot/compressed/misc.h | |
| parent | de50ce20cd05da4d1a7e5709a12fc23bc0b66be9 (diff) | |
| download | linux-3c98e71b42a7d0c14639ccb565ea315f3c887f92.tar.gz linux-3c98e71b42a7d0c14639ccb565ea315f3c887f92.tar.bz2 linux-3c98e71b42a7d0c14639ccb565ea315f3c887f92.zip | |
x86/boot: Add "acpi_rsdp=" early parsing
KASLR may randomly choose offsets which are located in movable memory
regions resulting in the movable memory becoming immovable.
The ACPI SRAT (System/Static Resource Affinity Table) describes memory
ranges including ranges of memory provided by hot-added memory devices.
In order to access SRAT, one needs the Root System Description Pointer
(RSDP) with which to find the Root/Extended System Description Table
(R/XSDT) which then contains the system description tables of which SRAT
is one of.
In case the RSDP address has been passed on the command line (kexec-ing
a second kernel) parse it from there.
[ bp: Rewrite the commit message and cleanup the code. ]
Signed-off-by: Chao Fan <fanc.fnst@cn.fujitsu.com>
Signed-off-by: Borislav Petkov <bp@suse.de>
Cc: bhe@redhat.com
Cc: caoj.fnst@cn.fujitsu.com
Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: indou.takao@jp.fujitsu.com
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Juergen Gross <jgross@suse.com>
Cc: kasong@redhat.com
Cc: Kees Cook <keescook@chromium.org>
Cc: "Kirill A. Shutemov" <kirill.shutemov@linux.intel.com>
Cc: msys.mizuma@gmail.com
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Tom Lendacky <thomas.lendacky@amd.com>
Cc: x86-ml <x86@kernel.org>
Link: https://lkml.kernel.org/r/20190123110850.12433-3-fanc.fnst@cn.fujitsu.com
Diffstat (limited to 'arch/x86/boot/compressed/misc.h')
| -rw-r--r-- | arch/x86/boot/compressed/misc.h | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/arch/x86/boot/compressed/misc.h b/arch/x86/boot/compressed/misc.h index a1d5918765f3..764ad50c0119 100644 --- a/arch/x86/boot/compressed/misc.h +++ b/arch/x86/boot/compressed/misc.h @@ -25,6 +25,9 @@ #include <asm/bootparam.h> #include <asm/bootparam_utils.h> +#define BOOT_CTYPE_H +#include <linux/acpi.h> + #define BOOT_BOOT_H #include "../ctype.h" |