linux-kernel - Re: [PATCH v3 2/8] KVM:CPUID: Define CET CPUID bits and CR4.CET master enable bit.

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, 26 Feb 2019 11:48:59 -0800
From:   Jim Mattson <jmattson@...gle.com>
To:     Yang Weijiang <weijiang.yang@...el.com>
Cc:     Paolo Bonzini <pbonzini@...hat.com>,
        Radim Krčmář <rkrcmar@...hat.com>,
        Sean Christopherson <sean.j.christopherson@...el.com>,
        LKML <linux-kernel@...r.kernel.org>,
        kvm list <kvm@...r.kernel.org>,
        "Michael S. Tsirkin" <mst@...hat.com>, yu-cheng.yu@...el.com,
        Zhang Yi Z <yi.z.zhang@...ux.intel.com>
Subject: Re: [PATCH v3 2/8] KVM:CPUID: Define CET CPUID bits and CR4.CET
 master enable bit.

On Mon, Feb 25, 2019 at 10:32 PM Yang Weijiang <weijiang.yang@...el.com> wrote:
>
> Guest queries CET SHSTK and IBT support by CPUID.(EAX=0x7,ECX=0),
> in return, ECX[bit 7] corresponds to SHSTK feature, and EDX[bit 20]
> corresponds to IBT feature.
> CR4.CET[bit 23] is CET master enable bit, it controls CET feature
> availability in guest OS.
>
> Note: Although SHSTK or IBT can be enabled independently,
>       either of the features is controlled by CR4.CET.
>
> Signed-off-by: Zhang Yi Z <yi.z.zhang@...ux.intel.com>
> Signed-off-by: Yang Weijiang <weijiang.yang@...el.com>

Am I missing something? X86_CR4_CET and X86_FEATURE_SHSTK and
X86_FEATURE_IBT don't appear to be defined in Linus' tree.