summaryrefslogtreecommitdiff
path: root/arch/x86/boot/compressed/misc.h
diff options
context:
space:
mode:
authorChao Fan <fanc.fnst@cn.fujitsu.com>2019-01-23 19:08:50 +0800
committerBorislav Petkov <bp@suse.de>2019-02-01 11:52:55 +0100
commit690eaa53205769fd5c0c36e3aa737a615135f969 (patch)
treebb342da71caa5b79ddffda9957fffad92925be7a /arch/x86/boot/compressed/misc.h
parent02a3e3cdb7f12fb8589e4a2e85d23c9e6544b54a (diff)
x86/boot/KASLR: Limit KASLR to extract the kernel in immovable memory only
KASLR may randomly choose a range which is located in movable memory regions. As a result, this will break memory hotplug and make the movable memory chosen by KASLR immovable. Therefore, limit KASLR to choose memory regions in the immovable range after consulting the SRAT table. [ bp: - Rewrite commit message. - Trim comments. ] Signed-off-by: Chao Fan <fanc.fnst@cn.fujitsu.com> Signed-off-by: Borislav Petkov <bp@suse.de> Cc: Ard Biesheuvel <ard.biesheuvel@linaro.org> Cc: Baoquan He <bhe@redhat.com> Cc: caoj.fnst@cn.fujitsu.com Cc: Dave Hansen <dave.hansen@linux.intel.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/20190123110850.12433-8-fanc.fnst@cn.fujitsu.com
Diffstat (limited to 'arch/x86/boot/compressed/misc.h')
-rw-r--r--arch/x86/boot/compressed/misc.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/arch/x86/boot/compressed/misc.h b/arch/x86/boot/compressed/misc.h
index 9911d11c5d09..19e8231a6fd6 100644
--- a/arch/x86/boot/compressed/misc.h
+++ b/arch/x86/boot/compressed/misc.h
@@ -132,6 +132,7 @@ static inline acpi_physical_address get_rsdp_addr(void) { return 0; }
#endif
#if defined(CONFIG_RANDOMIZE_BASE) && defined(CONFIG_MEMORY_HOTREMOVE)
+extern struct mem_vector immovable_mem[MAX_NUMNODES*2];
int count_immovable_mem_regions(void);
#else
static inline int count_immovable_mem_regions(void) { return 0; }