Messages in this thread | | | Subject | Re: [RFC Part1 PATCH v3 05/17] x86, realmode: Don't decrypt trampoline area under SEV | From | Tom Lendacky <> | Date | Thu, 10 Aug 2017 08:03:12 -0500 |
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On 7/26/2017 11:03 AM, Borislav Petkov wrote: > Subject: x86/realmode: ...
Done.
> > On Mon, Jul 24, 2017 at 02:07:45PM -0500, Brijesh Singh wrote: >> From: Tom Lendacky <thomas.lendacky@amd.com> >> >> 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> >> --- >> arch/x86/realmode/init.c | 6 ++++-- >> 1 file changed, 4 insertions(+), 2 deletions(-) >> >> diff --git a/arch/x86/realmode/init.c b/arch/x86/realmode/init.c >> index 1f71980..c7eeca7 100644 >> --- a/arch/x86/realmode/init.c >> +++ b/arch/x86/realmode/init.c >> @@ -63,9 +63,11 @@ 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. For SEV the trampoline area needs to be in >> + * encrypted memory, so only do this for SME. > > Or simply say: > > "It is not needed for SEV."
Will do.
Thanks, Tom
>
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