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Message-ID: <1517329802.18619.128.camel@infradead.org>
Subject: Re: [PATCH v2 3/3] KVM: VMX: make MSR bitmaps per-VCPU
From:   David Woodhouse <dwmw2@infradead.org>
To:     Radim =?UTF-8?Q?Kr=C4=8Dm=C3=A1=C5=99?= <rkrcmar@redhat.com>,
        Paolo Bonzini <pbonzini@redhat.com>
Cc:     linux-kernel@vger.kernel.org, kvm@vger.kernel.org,
        KarimAllah Ahmed <karahmed@amazon.de>
In-Reply-To: <20180130162357.GE22015@flask>
References: <1517043027-7655-1-git-send-email-pbonzini@redhat.com>
         <1517043027-7655-4-git-send-email-pbonzini@redhat.com>
         <20180130162357.GE22015@flask>
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Date:   Tue, 30 Jan 2018 16:30:02 +0000
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On Tue, 2018-01-30 at 17:23 +0100, Radim Kr=C4=8Dm=C3=A1=C5=99 wrote:
>=20
> The physical address of the nested msr_bitmap is never loaded into vmcs.
>=20
> The resolution you provided had extra hunk in prepare_vmcs02_full():
>=20
> +=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0vmcs_write64(MSR_BITMAP, __pa(=
vmx->nested.vmcs02.msr_bitmap));
>=20
> I have queued that as:
>=20
> +=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0if (cpu_has_vmx_msr_bitmap())
> +=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=
=C2=A0=C2=A0=C2=A0vmcs_write64(MSR_BITMAP, __pa(vmx->nested.vmcs02.msr_bitm=
ap));
>=20
> but it should be a part of the patch or a followup fix.
>=20
> Is the branch already merged into PTI?

No, we've never seen a 4.14-based branch that could be merged. I made
one myself for the moment but assumed there would be one from Paulo
that was then pulled into both tip/x86/pti and the kvm.git tree.
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