Re: [PATCH v3 5/8] x86/sme: Replace occurrences of sme_active() with... | linuxppc-dev

[PATCH v3 0/8] Implement generic cc_platform_has() helper function · Tom Lendacky <thomas.lendacky@amd.com> · 2021-09-08
[PATCH v3 1/8] x86/ioremap: Selectively build arch override encryption functions · Tom Lendacky <thomas.lendacky@amd.com> · 2021-09-08
[PATCH v3 2/8] mm: Introduce a function to check for confidential computing features · Tom Lendacky <thomas.lendacky@amd.com> · 2021-09-08
Re: [PATCH v3 2/8] mm: Introduce a function to check for confidential computing features · Christophe Leroy <hidden> · 2021-09-09
Re: [PATCH v3 2/8] mm: Introduce a function to check for confidential computing features · Borislav Petkov <bp@alien8.de> · 2021-09-10
[PATCH v3 3/8] x86/sev: Add an x86 version of cc_platform_has() · Tom Lendacky <thomas.lendacky@amd.com> · 2021-09-08
Re: [PATCH v3 3/8] x86/sev: Add an x86 version of cc_platform_has() · Borislav Petkov <bp@alien8.de> · 2021-09-11
[PATCH v3 4/8] powerpc/pseries/svm: Add a powerpc version of cc_platform_has() · Tom Lendacky <thomas.lendacky@amd.com> · 2021-09-08
Re: [PATCH v3 4/8] powerpc/pseries/svm: Add a powerpc version of cc_platform_has() · Christophe Leroy <hidden> · 2021-09-09
Re: [PATCH v3 4/8] powerpc/pseries/svm: Add a powerpc version of cc_platform_has() · Borislav Petkov <bp@alien8.de> · 2021-09-14
Re: [PATCH v3 4/8] powerpc/pseries/svm: Add a powerpc version of cc_platform_has() · Christophe Leroy <hidden> · 2021-09-14
Re: [PATCH v3 4/8] powerpc/pseries/svm: Add a powerpc version of cc_platform_has() · Borislav Petkov <bp@alien8.de> · 2021-09-14
Re: [PATCH v3 4/8] powerpc/pseries/svm: Add a powerpc version of cc_platform_has() · Michael Ellerman <mpe@ellerman.id.au> · 2021-09-15
Re: [PATCH v3 4/8] powerpc/pseries/svm: Add a powerpc version of cc_platform_has() · Borislav Petkov <bp@alien8.de> · 2021-09-15
Re: [PATCH v3 4/8] powerpc/pseries/svm: Add a powerpc version of cc_platform_has() · Christophe Leroy <hidden> · 2021-09-15
Re: [PATCH v3 4/8] powerpc/pseries/svm: Add a powerpc version of cc_platform_has() · Borislav Petkov <bp@alien8.de> · 2021-09-15
Re: [PATCH v3 4/8] powerpc/pseries/svm: Add a powerpc version of cc_platform_has() · Christoph Hellwig <hch@infradead.org> · 2021-09-16
Re: [PATCH v3 4/8] powerpc/pseries/svm: Add a powerpc version of cc_platform_has() · Michael Ellerman <mpe@ellerman.id.au> · 2021-09-16
[PATCH v3 5/8] x86/sme: Replace occurrences of sme_active() with cc_platform_has() · Tom Lendacky <thomas.lendacky@amd.com> · 2021-09-08
Re: [PATCH v3 5/8] x86/sme: Replace occurrences of sme_active() with cc_platform_has() · Borislav Petkov <bp@alien8.de> · 2021-09-14
Re: [PATCH v3 5/8] x86/sme: Replace occurrences of sme_active() with cc_platform_has() · Kirill A. Shutemov <hidden> · 2021-09-21
Re: [PATCH v3 5/8] x86/sme: Replace occurrences of sme_active() with cc_platform_has() · Tom Lendacky <thomas.lendacky@amd.com> · 2021-09-21
Re: [PATCH v3 5/8] x86/sme: Replace occurrences of sme_active() with cc_platform_has() · Borislav Petkov <bp@alien8.de> · 2021-09-21
Re: [PATCH v3 5/8] x86/sme: Replace occurrences of sme_active() with cc_platform_has() · Kirill A. Shutemov <hidden> · 2021-09-21
Re: [PATCH v3 5/8] x86/sme: Replace occurrences of sme_active() with cc_platform_has() · Borislav Petkov <bp@alien8.de> · 2021-09-21
Re: [PATCH v3 5/8] x86/sme: Replace occurrences of sme_active() with cc_platform_has() · Kirill A. Shutemov <hidden> · 2021-09-21
Re: [PATCH v3 5/8] x86/sme: Replace occurrences of sme_active() with cc_platform_has() · Tom Lendacky <thomas.lendacky@amd.com> · 2021-09-21
Re: [PATCH v3 5/8] x86/sme: Replace occurrences of sme_active() with cc_platform_has() · Kirill A. Shutemov <hidden> · 2021-09-21
Re: [PATCH v3 5/8] x86/sme: Replace occurrences of sme_active() with cc_platform_has() · Tom Lendacky <thomas.lendacky@amd.com> · 2021-09-22
Re: [PATCH v3 5/8] x86/sme: Replace occurrences of sme_active() with cc_platform_has() · Kirill A. Shutemov <hidden> · 2021-09-22
Re: [PATCH v3 5/8] x86/sme: Replace occurrences of sme_active() with cc_platform_has() · Borislav Petkov <bp@alien8.de> · 2021-09-22
Re: [PATCH v3 5/8] x86/sme: Replace occurrences of sme_active() with cc_platform_has() · Kirill A. Shutemov <hidden> · 2021-09-22
Re: [PATCH v3 5/8] x86/sme: Replace occurrences of sme_active() with cc_platform_has() · Borislav Petkov <bp@alien8.de> · 2021-09-23
Re: [PATCH v3 5/8] x86/sme: Replace occurrences of sme_active() with cc_platform_has() · Kirill A. Shutemov <hidden> · 2021-09-24
Re: [PATCH v3 5/8] x86/sme: Replace occurrences of sme_active() with cc_platform_has() · Borislav Petkov <bp@alien8.de> · 2021-09-24
Re: [PATCH v3 5/8] x86/sme: Replace occurrences of sme_active() with cc_platform_has() · Tom Lendacky <thomas.lendacky@amd.com> · 2021-09-24
[PATCH v3 6/8] x86/sev: Replace occurrences of sev_active() with cc_platform_has() · Tom Lendacky <thomas.lendacky@amd.com> · 2021-09-08
[PATCH v3 7/8] x86/sev: Replace occurrences of sev_es_active() with cc_platform_has() · Tom Lendacky <thomas.lendacky@amd.com> · 2021-09-08
[PATCH v3 8/8] treewide: Replace the use of mem_encrypt_active() with cc_platform_has() · Tom Lendacky <thomas.lendacky@amd.com> · 2021-09-08
Re: [PATCH v3 8/8] treewide: Replace the use of mem_encrypt_active() with cc_platform_has() · Christophe Leroy <hidden> · 2021-09-09
Re: [PATCH v3 8/8] treewide: Replace the use of mem_encrypt_active() with cc_platform_has() · Tom Lendacky <thomas.lendacky@amd.com> · 2021-09-09
Re: [PATCH v3 0/8] Implement generic cc_platform_has() helper function · Christian Borntraeger <hidden> · 2021-09-09
Re: [PATCH v3 0/8] Implement generic cc_platform_has() helper function · Tom Lendacky <thomas.lendacky@amd.com> · 2021-09-09
Re: [PATCH v3 0/8] Implement generic cc_platform_has() helper function · Borislav Petkov <bp@alien8.de> · 2021-09-15
Re: [PATCH v3 0/8] Implement generic cc_platform_has() helper function · "Kuppuswamy, Sathyanarayanan" <sathyanarayanan.kuppuswamy@linux.intel.com> · 2021-09-15
Re: [PATCH v3 0/8] Implement generic cc_platform_has() helper function · Borislav Petkov <bp@alien8.de> · 2021-09-16
Re: [PATCH v3 0/8] Implement generic cc_platform_has() helper function · "Kuppuswamy, Sathyanarayanan" <sathyanarayanan.kuppuswamy@linux.intel.com> · 2021-09-16

Re: [PATCH v3 5/8] x86/sme: Replace occurrences of sme_active() with cc_platform_has()

From: Kirill A. Shutemov <hidden>
Date: 2021-09-21 21:34:06
Also in: amd-gfx, dri-devel, kexec, kvm, linux-efi, linux-fsdevel, linux-iommu, linux-s390, lkml, platform-driver-x86

On Tue, Sep 21, 2021 at 11:27:17PM +0200, Borislav Petkov wrote:

On Wed, Sep 22, 2021 at 12:20:59AM +0300, Kirill A. Shutemov wrote:

quoted

I still believe calling cc_platform_has() from __startup_64() is totally
broken as it lacks proper wrapping while accessing global variables.

Well, one of the issues on the AMD side was using boot_cpu_data too
early and the Intel side uses it too. Can you replace those checks with
is_tdx_guest() or whatever was the helper's name which would check
whether the the kernel is running as a TDX guest, and see if that helps?

There's no need in Intel check this early. Only AMD need it. Maybe just
opencode them?

-- 
 Kirill A. Shutemov

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