lists.openwall.net   lists  /  announce  owl-users  owl-dev  john-users  john-dev  passwdqc-users  yescrypt  popa3d-users  /  oss-security  kernel-hardening  musl  sabotage  tlsify  passwords  /  crypt-dev  xvendor  /  Bugtraq  Full-Disclosure  linux-kernel  linux-netdev  linux-ext4  linux-hardening  linux-cve-announce  PHC 
Open Source and information security mailing list archives
 
Hash Suite: Windows password security audit tool. GUI, reports in PDF.
[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]
Date:   Tue, 28 Sep 2021 22:58:06 +0200
From:   Borislav Petkov <bp@...en8.de>
To:     "Kuppuswamy, Sathyanarayanan" 
        <sathyanarayanan.kuppuswamy@...ux.intel.com>
Cc:     LKML <linux-kernel@...r.kernel.org>,
        Andi Kleen <ak@...ux.intel.com>,
        Andy Lutomirski <luto@...nel.org>,
        Ard Biesheuvel <ardb@...nel.org>, Baoquan He <bhe@...hat.com>,
        Benjamin Herrenschmidt <benh@...nel.crashing.org>,
        Christian Borntraeger <borntraeger@...ibm.com>,
        Daniel Vetter <daniel@...ll.ch>,
        Dave Young <dyoung@...hat.com>,
        David Airlie <airlied@...ux.ie>,
        Heiko Carstens <hca@...ux.ibm.com>,
        Joerg Roedel <joro@...tes.org>,
        "Kirill A. Shutemov" <kirill@...temov.name>,
        Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>,
        Maxime Ripard <mripard@...nel.org>,
        Michael Ellerman <mpe@...erman.id.au>,
        Paul Mackerras <paulus@...ba.org>,
        Tom Lendacky <thomas.lendacky@....com>,
        Thomas Zimmermann <tzimmermann@...e.de>,
        Vasily Gorbik <gor@...ux.ibm.com>,
        VMware Graphics <linux-graphics-maintainer@...are.com>,
        Will Deacon <will@...nel.org>,
        Christoph Hellwig <hch@...radead.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,
        amd-gfx@...ts.freedesktop.org, dri-devel@...ts.freedesktop.org,
        kexec@...ts.infradead.org
Subject: Re: [PATCH v4 0/8] Implement generic cc_platform_has() helper
 function

On Tue, Sep 28, 2021 at 01:48:46PM -0700, Kuppuswamy, Sathyanarayanan wrote:
> Just read it. If you want to use cpuid_has_tdx_guest() directly in
> cc_platform_has(), then you want to rename intel_cc_platform_has() to
> tdx_cc_platform_has()?

Why?

You simply do:

	if (cpuid_has_tdx_guest())
		intel_cc_platform_has(...);

and lemme paste from that mail: " ...you should use
cpuid_has_tdx_guest() instead but cache its result so that you don't
call CPUID each time the kernel executes cc_platform_has()."

Makes sense?

-- 
Regards/Gruss,
    Boris.

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

Powered by blists - more mailing lists