Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) client-ip=23.128.96.18;
MIME-Version: 1.0
References: <20210430131733.192414-1-rsaripal@amd.com> <20210430131733.192414-2-rsaripal@amd.com>
 <CAAeT=Fw-nt5h3DhRCQr8Ma71NiP7dHB+WD2hie_55SpCHR=mDQ@mail.gmail.com>
 <YIxhCSt6t5U/Eldb@zn.tnic> <CAAeT=FxqM5P+6U8vBywuvnaJ0s4sWdRHK2fvn4b1zf5mMLKReg@mail.gmail.com>
 <YIxyeZodkm3KpRYK@zn.tnic>
In-Reply-To: <YIxyeZodkm3KpRYK@zn.tnic>
From:   Reiji Watanabe <reijiw@google.com>
Date:   Fri, 30 Apr 2021 18:01:08 -0700
Message-ID: <CAAeT=Fxk2U_13=03ZhFumT5c3k+F3UGExp6WZ+TK4VgJdt=RkQ@mail.gmail.com>
Subject: Re: [PATCH v4 1/1] x86/cpufeatures: Implement Predictive Store
 Forwarding control.
To:     Borislav Petkov <bp@alien8.de>
Cc:     Ramakrishna Saripalli <rsaripal@amd.com>,
        linux-kernel@vger.kernel.org, x86@kernel.org, tglx@linutronix.de,
        mingo@redhat.com, hpa@zytor.com, Jonathan Corbet <corbet@lwn.net>,
        bsd@redhat.com
Content-Type: text/plain; charset="UTF-8"
Precedence: bulk

> > Could you please clarify ?
>
> Clarify what?

I'm sorry, I overlooked the response from Ramakrishna today.
So, Never mind...


> I asked you whether you have a VM use case. Since you're talking/asking
> about virt support, you likely have some use case in mind...

When PSFD is available on the host (and the feature is exposed to
its guest), basically, we would like to let the guest enable or
disable PSFD on any vCPUs as it likes.

Thanks,
Reiji