linux-kernel - Re: [PATCH v3 3/8] KVM:CPUID: Add CPUID support for Guest CET

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]

Message-ID: <7b6f1186-71a1-4246-3884-92cc52853fea@redhat.com>
Date:   Fri, 8 Mar 2019 12:32:12 +0100
From:   Paolo Bonzini <pbonzini@...hat.com>
To:     Yang Weijiang <weijiang.yang@...el.com>, rkrcmar@...hat.com,
        sean.j.christopherson@...el.com, jmattson@...gle.com,
        linux-kernel@...r.kernel.org, kvm@...r.kernel.org, mst@...hat.com,
        yu-cheng.yu@...el.com
Cc:     Zhang Yi Z <yi.z.zhang@...ux.intel.com>
Subject: Re: [PATCH v3 3/8] KVM:CPUID: Add CPUID support for Guest CET

On 25/02/19 14:27, Yang Weijiang wrote:
> +				compacted = entry[i].eax &
> +					(F(XSAVES) | F(XSAVEC));
> +				entry[i].ebx = xstate_required_size(supported,
> +								    compacted);

If XSAVES and XSAVEC are both false, just set ebx to 0 as it was before
this patch.

Paolo