linux-kernel - Re: [RFC PATCH v2 08/11] KVM: VMX: Advertise MITI_ENUM_RETPOLINE_S

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] [day] [month] [year] [list]

Message-ID: <00679dfd-5131-d951-f554-94c66c7c357e@intel.com>
Date:   Mon, 22 May 2023 17:43:21 +0800
From:   "Liu, Jingqi" <jingqi.liu@...el.com>
To:     Chao Gao <chao.gao@...el.com>, <kvm@...r.kernel.org>
CC:     Jiaan Lu <jiaan.lu@...el.com>, Zhang Chen <chen.zhang@...el.com>,
        "Sean Christopherson" <seanjc@...gle.com>,
        Paolo Bonzini <pbonzini@...hat.com>,
        Thomas Gleixner <tglx@...utronix.de>,
        Ingo Molnar <mingo@...hat.com>, Borislav Petkov <bp@...en8.de>,
        Dave Hansen <dave.hansen@...ux.intel.com>, <x86@...nel.org>,
        "H. Peter Anvin" <hpa@...or.com>, <linux-kernel@...r.kernel.org>
Subject: Re: [RFC PATCH v2 08/11] KVM: VMX: Advertise
 MITI_ENUM_RETPOLINE_S_SUPPORT

On 4/14/2023 2:25 PM, Chao Gao wrote:
> Allow guest to query if the underying VMM understands Retpoline and
> report the statue of Retpoline in suprevisor mode i.e. CPL < 3 via
s/statue/status
> MSR_VIRTUAL_MITIGATION_ENUM/CTRL.
>
> Disable RRSBA behavior by setting RRSBA_DIS_S for guest if guest is
> using retpoline and the processor has the behavior.
>
> Signed-off-by: Zhang Chen <chen.zhang@...el.com>
> Signed-off-by: Chao Gao <chao.gao@...el.com>
> Tested-by: Jiaan Lu <jiaan.lu@...el.com>
> ---
Thanks,
Jingqi