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| author | Tom Lendacky <thomas.lendacky@amd.com> | 2017-10-20 09:30:46 -0500 |
|---|---|---|
| committer | Thomas Gleixner <tglx@linutronix.de> | 2017-11-07 15:35:55 +0100 |
| commit | fcdcd6cdd98ff4d0cf876f863024a2fb0b491d41 (patch) | |
| tree | ecfda2a3cec17141dccb467a026bf529e6aebd24 /arch/x86/realmode | |
| parent | 682af54399b6111730aec0be63e5f6a3a3359a76 (diff) | |
| download | linux-fcdcd6cdd98ff4d0cf876f863024a2fb0b491d41.tar.gz linux-fcdcd6cdd98ff4d0cf876f863024a2fb0b491d41.tar.bz2 linux-fcdcd6cdd98ff4d0cf876f863024a2fb0b491d41.zip | |
x86/realmode: Don't decrypt trampoline area under SEV
When SEV is active the trampoline area will need to be in encrypted
memory so only mark the area decrypted if SME is active.
Signed-off-by: Tom Lendacky <thomas.lendacky@amd.com>
Signed-off-by: Brijesh Singh <brijesh.singh@amd.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Borislav Petkov <bp@suse.de>
Tested-by: Borislav Petkov <bp@suse.de>
Cc: Laura Abbott <labbott@redhat.com>
Cc: kvm@vger.kernel.org
Cc: Borislav Petkov <bp@alien8.de>
Cc: Andy Lutomirski <luto@kernel.org>
Cc: "Kirill A. Shutemov" <kirill.shutemov@linux.intel.com>
Link: https://lkml.kernel.org/r/20171020143059.3291-5-brijesh.singh@amd.com
Diffstat (limited to 'arch/x86/realmode')
| -rw-r--r-- | arch/x86/realmode/init.c | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/arch/x86/realmode/init.c b/arch/x86/realmode/init.c index ed84d3917a59..d10105825d57 100644 --- a/arch/x86/realmode/init.c +++ b/arch/x86/realmode/init.c @@ -64,9 +64,10 @@ static void __init setup_real_mode(void) /* * If SME is active, the trampoline area will need to be in * decrypted memory in order to bring up other processors - * successfully. + * successfully. This is not needed for SEV. */ - set_memory_decrypted((unsigned long)base, size >> PAGE_SHIFT); + if (sme_active()) + set_memory_decrypted((unsigned long)base, size >> PAGE_SHIFT); memcpy(base, real_mode_blob, size); |