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authorTom Lendacky <thomas.lendacky@amd.com>2017-07-18 00:10:11 +0300
committerIngo Molnar <mingo@kernel.org>2017-07-18 12:38:01 +0300
commitb9d05200bc12444c7778a49c9694d8382ed06aa8 (patch)
treeb9fe6dbcca1bbb368eff88bbe33239c51265a8ef /arch/x86/mm/kasan_init_64.c
parent7f8b7e7f4ccbbd1fb8badddfabd28c955aea87b4 (diff)
downloadlinux-b9d05200bc12444c7778a49c9694d8382ed06aa8.tar.xz
x86/mm: Insure that boot memory areas are mapped properly
The boot data and command line data are present in memory in a decrypted state and are copied early in the boot process. The early page fault support will map these areas as encrypted, so before attempting to copy them, add decrypted mappings so the data is accessed properly when copied. For the initrd, encrypt this data in place. Since the future mapping of the initrd area will be mapped as encrypted the data will be accessed properly. Signed-off-by: Tom Lendacky <thomas.lendacky@amd.com> Reviewed-by: Thomas Gleixner <tglx@linutronix.de> Cc: Alexander Potapenko <glider@google.com> Cc: Andrey Ryabinin <aryabinin@virtuozzo.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: Arnd Bergmann <arnd@arndb.de> Cc: Borislav Petkov <bp@alien8.de> Cc: Brijesh Singh <brijesh.singh@amd.com> Cc: Dave Young <dyoung@redhat.com> Cc: Dmitry Vyukov <dvyukov@google.com> Cc: Jonathan Corbet <corbet@lwn.net> Cc: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> Cc: Larry Woodman <lwoodman@redhat.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Matt Fleming <matt@codeblueprint.co.uk> Cc: Michael S. Tsirkin <mst@redhat.com> Cc: Paolo Bonzini <pbonzini@redhat.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Radim Krčmář <rkrcmar@redhat.com> Cc: Rik van Riel <riel@redhat.com> Cc: Toshimitsu Kani <toshi.kani@hpe.com> Cc: kasan-dev@googlegroups.com Cc: kvm@vger.kernel.org Cc: linux-arch@vger.kernel.org Cc: linux-doc@vger.kernel.org Cc: linux-efi@vger.kernel.org Cc: linux-mm@kvack.org Link: http://lkml.kernel.org/r/bb0d430b41efefd45ee515aaf0979dcfda8b6a44.1500319216.git.thomas.lendacky@amd.com Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'arch/x86/mm/kasan_init_64.c')
-rw-r--r--arch/x86/mm/kasan_init_64.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/x86/mm/kasan_init_64.c b/arch/x86/mm/kasan_init_64.c
index 39d4daf5e289..bc84b73684b7 100644
--- a/arch/x86/mm/kasan_init_64.c
+++ b/arch/x86/mm/kasan_init_64.c
@@ -11,8 +11,8 @@
#include <asm/e820/types.h>
#include <asm/tlbflush.h>
#include <asm/sections.h>
+#include <asm/pgtable.h>
-extern pgd_t early_top_pgt[PTRS_PER_PGD];
extern struct range pfn_mapped[E820_MAX_ENTRIES];
static int __init map_range(struct range *range)