linux-kernel - Re: [PATCH v2 02/12] mm: Introduce a function to check for virtualization protection features

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Date:   Thu, 19 Aug 2021 11:39:57 -0500
From:   Tom Lendacky <thomas.lendacky@....com>
To:     Christoph Hellwig <hch@...radead.org>
Cc:     linux-kernel@...r.kernel.org, x86@...nel.org,
        linuxppc-dev@...ts.ozlabs.org, linux-s390@...r.kernel.org,
        iommu@...ts.linux-foundation.org, kvm@...r.kernel.org,
        linux-efi@...r.kernel.org, platform-driver-x86@...r.kernel.org,
        linux-graphics-maintainer@...are.com,
        amd-gfx@...ts.freedesktop.org, dri-devel@...ts.freedesktop.org,
        kexec@...ts.infradead.org, linux-fsdevel@...r.kernel.org,
        Borislav Petkov <bp@...en8.de>,
        Brijesh Singh <brijesh.singh@....com>,
        Joerg Roedel <joro@...tes.org>,
        Andi Kleen <ak@...ux.intel.com>,
        Sathyanarayanan Kuppuswamy 
        <sathyanarayanan.kuppuswamy@...ux.intel.com>,
        Tianyu Lan <Tianyu.Lan@...rosoft.com>,
        Joerg Roedel <jroedel@...e.de>
Subject: Re: [PATCH v2 02/12] mm: Introduce a function to check for
 virtualization protection features

On 8/19/21 4:46 AM, Christoph Hellwig wrote:
> On Fri, Aug 13, 2021 at 11:59:21AM -0500, Tom Lendacky wrote:
>> +#define PATTR_MEM_ENCRYPT		0	/* Encrypted memory */
>> +#define PATTR_HOST_MEM_ENCRYPT		1	/* Host encrypted memory */
>> +#define PATTR_GUEST_MEM_ENCRYPT		2	/* Guest encrypted memory */
>> +#define PATTR_GUEST_PROT_STATE		3	/* Guest encrypted state */
> 
> Please write an actual detailed explanaton of what these mean, that
> is what implications it has on the kernel.

Will do.

Thanks,
Tom

>