Re: [PATCH v7 11/36] x86/mm: Add SME support for read_cr3_pa()

From	Borislav Petkov <bp@alien8.de>
Newsgroups	linux.kernel
Subject	Re: [PATCH v7 11/36] x86/mm: Add SME support for read_cr3_pa()
Date	2017-06-20 10:30 +0200
Message-ID	<tUmHV-6aA-29@gated-at.bofh.it> (permalink)
References	<tTjsJ-5VA-5@gated-at.bofh.it> <tUmHV-6aA-31@gated-at.bofh.it>
Organization	linux.* mail to news gateway

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On Fri, Jun 16, 2017 at 01:51:55PM -0500, Tom Lendacky wrote:
> The cr3 register entry can contain the SME encryption mask that indicates
> the PGD is encrypted.  The encryption mask should not be used when
> creating a virtual address from the cr3 register, so remove the SME
> encryption mask in the read_cr3_pa() function.
> 
> During early boot SME will need to use a native version of read_cr3_pa(),
> so create native_read_cr3_pa().
> 
> Signed-off-by: Tom Lendacky <thomas.lendacky@amd.com>
> ---
>  arch/x86/include/asm/processor-flags.h |    3 ++-
>  arch/x86/include/asm/processor.h       |    5 +++++
>  2 files changed, 7 insertions(+), 1 deletion(-)

Reviewed-by: Borislav Petkov <bp@suse.de>

-- 
Regards/Gruss,
    Boris.

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Re: [PATCH v7 11/36] x86/mm: Add SME support for read_cr3_pa() Borislav Petkov <bp@alien8.de> - 2017-06-20 10:30 +0200

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