summaryrefslogtreecommitdiff
path: root/arch/x86/kernel/head64.c
diff options
context:
space:
mode:
authorTom Lendacky <thomas.lendacky@amd.com>2017-07-18 00:10:35 +0300
committerIngo Molnar <mingo@kernel.org>2017-07-18 21:23:26 +0300
commitaca20d5462149333ba8b24a4a352be5b7a00dfd2 (patch)
treeac59619797ace1cc59778ddaf04e10264629ca85 /arch/x86/kernel/head64.c
parent7375ae3a0b79ea072f4c672039f08f5db633b9e1 (diff)
downloadlinux-aca20d5462149333ba8b24a4a352be5b7a00dfd2.tar.xz
x86/mm: Add support to make use of Secure Memory Encryption
Add support to check if SME has been enabled and if memory encryption should be activated (checking of command line option based on the configuration of the default state). If memory encryption is to be activated, then the encryption mask is set and the kernel is encrypted "in place." 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/5f0da2fd4cce63f556117549e2c89c170072209f.1500319216.git.thomas.lendacky@amd.com Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'arch/x86/kernel/head64.c')
-rw-r--r--arch/x86/kernel/head64.c5
1 files changed, 3 insertions, 2 deletions
diff --git a/arch/x86/kernel/head64.c b/arch/x86/kernel/head64.c
index 0cdb53bf4c4b..925b2928f377 100644
--- a/arch/x86/kernel/head64.c
+++ b/arch/x86/kernel/head64.c
@@ -45,7 +45,8 @@ static void __head *fixup_pointer(void *ptr, unsigned long physaddr)
return ptr - (void *)_text + (void *)physaddr;
}
-unsigned long __head __startup_64(unsigned long physaddr)
+unsigned long __head __startup_64(unsigned long physaddr,
+ struct boot_params *bp)
{
unsigned long load_delta, *p;
unsigned long pgtable_flags;
@@ -70,7 +71,7 @@ unsigned long __head __startup_64(unsigned long physaddr)
for (;;);
/* Activate Secure Memory Encryption (SME) if supported and enabled */
- sme_enable();
+ sme_enable(bp);
/* Include the SME encryption mask in the fixup value */
load_delta += sme_get_me_mask();