Re: [PATCH v2 03/12] x86/sev: Add an x86 version of prot_guest_has()

From: Borislav Petkov <bp@alien8.de>
Date: 2021-08-15 14:38:41
Also in: amd-gfx, dri-devel, kexec, kvm, linux-efi, linux-fsdevel, linux-iommu, linux-s390, lkml, platform-driver-x86
Reply to: Tom Lendacky, 2021-08-15

On Sun, Aug 15, 2021 at 08:53:31AM -0500, Tom Lendacky wrote:

It's not a cross-vendor thing as opposed to a KVM or other hypervisor
thing where the family doesn't have to be reported as AMD or HYGON.

What would be the use case? A HV starts a guest which is supposed to be
encrypted using the AMD's confidential guest technology but the HV tells
the guest that it is not running on an AMD SVM HV but something else?

Is that even an actual use case?

Or am I way off?

I know we have talked about this in the past but this still sounds
insane.

-- 
Regards/Gruss,
    Boris.

https://people.kernel.org/tglx/notes-about-netiquette

Tom Lendacky · 2021-08-13
[PATCH v2 01/12] x86/ioremap: Selectively build arch override encryption functions · Tom Lendacky · 2021-08-13
Re: [PATCH v2 01/12] x86/ioremap: Selectively build arch override encryption functions · Borislav Petkov · 2021-08-14
[PATCH v2 02/12] mm: Introduce a function to check for virtualization protection features · Tom Lendacky · 2021-08-13
Re: [PATCH v2 02/12] mm: Introduce a function to check for virtualization protection features · Kuppuswamy, Sathyanarayanan · 2021-08-13
Re: [PATCH v2 02/12] mm: Introduce a function to check for virtualization protection features · Borislav Petkov · 2021-08-14
Re: [PATCH v2 02/12] mm: Introduce a function to check for virtualization protection features · Tom Lendacky · 2021-08-14
Re: [PATCH v2 02/12] mm: Introduce a function to check for virtualization protection features · Christoph Hellwig · 2021-08-19
Re: [PATCH v2 02/12] mm: Introduce a function to check for virtualization protection features · Tom Lendacky · 2021-08-19
[PATCH v2 03/12] x86/sev: Add an x86 version of prot_guest_has() · Tom Lendacky · 2021-08-13
Re: [PATCH v2 03/12] x86/sev: Add an x86 version of prot_guest_has() · Borislav Petkov · 2021-08-14
Re: [PATCH v2 03/12] x86/sev: Add an x86 version of prot_guest_has() · Tom Lendacky · 2021-08-15
Re: [PATCH v2 03/12] x86/sev: Add an x86 version of prot_guest_has() · Borislav Petkov · 2021-08-15
Re: [PATCH v2 03/12] x86/sev: Add an x86 version of prot_guest_has() · Tom Lendacky · 2021-08-17
Re: [PATCH v2 03/12] x86/sev: Add an x86 version of prot_guest_has() · Borislav Petkov · 2021-08-17
Re: [PATCH v2 03/12] x86/sev: Add an x86 version of prot_guest_has() · Christoph Hellwig · 2021-08-19
Re: [PATCH v2 03/12] x86/sev: Add an x86 version of prot_guest_has() · Borislav Petkov · 2021-08-19
Re: [PATCH v2 03/12] x86/sev: Add an x86 version of prot_guest_has() · Tom Lendacky · 2021-08-19
Re: [PATCH v2 03/12] x86/sev: Add an x86 version of prot_guest_has() · Kuppuswamy, Sathyanarayanan · 2021-08-19
Re: [PATCH v2 03/12] x86/sev: Add an x86 version of prot_guest_has() · Christoph Hellwig · 2021-08-24
[PATCH v2 04/12] powerpc/pseries/svm: Add a powerpc version of prot_guest_has() · Tom Lendacky · 2021-08-13
Re: [PATCH v2 04/12] powerpc/pseries/svm: Add a powerpc version of prot_guest_has() · Borislav Petkov · 2021-08-17
Re: [PATCH v2 04/12] powerpc/pseries/svm: Add a powerpc version of prot_guest_has() · Tom Lendacky · 2021-08-17
Re: [PATCH v2 04/12] powerpc/pseries/svm: Add a powerpc version of prot_guest_has() · Michael Ellerman · 2021-08-17
Re: [PATCH v2 04/12] powerpc/pseries/svm: Add a powerpc version of prot_guest_has() · Christoph Hellwig · 2021-08-19
Re: [PATCH v2 04/12] powerpc/pseries/svm: Add a powerpc version of prot_guest_has() · Tom Lendacky · 2021-08-19
[PATCH v2 05/12] x86/sme: Replace occurrences of sme_active() with prot_guest_has() · Tom Lendacky · 2021-08-13
Re: [PATCH v2 05/12] x86/sme: Replace occurrences of sme_active() with prot_guest_has() · Borislav Petkov · 2021-08-17
Re: [PATCH v2 05/12] x86/sme: Replace occurrences of sme_active() with prot_guest_has() · Tom Lendacky · 2021-08-17
Re: [PATCH v2 05/12] x86/sme: Replace occurrences of sme_active() with prot_guest_has() · Borislav Petkov · 2021-08-17
[PATCH v2 06/12] x86/sev: Replace occurrences of sev_active() with prot_guest_has() · Tom Lendacky · 2021-08-13
Re: [PATCH v2 06/12] x86/sev: Replace occurrences of sev_active() with prot_guest_has() · Borislav Petkov · 2021-08-17
Re: [PATCH v2 06/12] x86/sev: Replace occurrences of sev_active() with prot_guest_has() · Tom Lendacky · 2021-08-17
Re: [PATCH v2 06/12] x86/sev: Replace occurrences of sev_active() with prot_guest_has() · Borislav Petkov · 2021-08-17
[PATCH v2 07/12] x86/sev: Replace occurrences of sev_es_active() with prot_guest_has() · Tom Lendacky · 2021-08-13
Re: [PATCH v2 07/12] x86/sev: Replace occurrences of sev_es_active() with prot_guest_has() · Borislav Petkov · 2021-08-17
[PATCH v2 08/12] treewide: Replace the use of mem_encrypt_active() with prot_guest_has() · Tom Lendacky · 2021-08-13
[PATCH v2 09/12] mm: Remove the now unused mem_encrypt_active() function · Tom Lendacky · 2021-08-13
Re: [PATCH v2 09/12] mm: Remove the now unused mem_encrypt_active() function · Borislav Petkov · 2021-08-17
Re: [PATCH v2 09/12] mm: Remove the now unused mem_encrypt_active() function · Borislav Petkov · 2021-08-17
Re: [PATCH v2 09/12] mm: Remove the now unused mem_encrypt_active() function · Tom Lendacky · 2021-08-17
[PATCH v2 10/12] x86/sev: Remove the now unused mem_encrypt_active() function · Tom Lendacky · 2021-08-13
[PATCH v2 11/12] powerpc/pseries/svm: Remove the now unused mem_encrypt_active() function · Tom Lendacky · 2021-08-13
[PATCH v2 12/12] s390/mm: Remove the now unused mem_encrypt_active() function · Tom Lendacky · 2021-08-13
Tom Lendacky · 2021-08-13
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