linux-kernel - Re: [PATCH] x86/kvm/nVMX: read from MSR_IA32_VMX_PROCBASED

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Date:   Thu, 7 Feb 2019 13:17:26 -0800
From:   Jim Mattson <jmattson@...gle.com>
To:     Vitaly Kuznetsov <vkuznets@...hat.com>
Cc:     kvm list <kvm@...r.kernel.org>,
        Paolo Bonzini <pbonzini@...hat.com>,
        Radim Krčmář <rkrcmar@...hat.com>,
        Sean Christopherson <sean.j.christopherson@...el.com>,
        LKML <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] x86/kvm/nVMX: read from MSR_IA32_VMX_PROCBASED_CTLS2 only
 when it is available

On Thu, Feb 7, 2019 at 2:42 AM Vitaly Kuznetsov <vkuznets@...hat.com> wrote:
>
> SDM says MSR_IA32_VMX_PROCBASED_CTLS2 is only available "If
> (CPUID.01H:ECX.[5] && IA32_VMX_PROCBASED_CTLS[63])". It was found that
> some old cpus (namely "Intel(R) Core(TM)2 CPU 6600 @ 2.40GHz (family: 0x6,
> model: 0xf, stepping: 0x6") don't have it. Add the missing check.
>
> Reported-by: Zdenek Kaspar <zkaspar82@...il.com>
> Tested-by: Zdenek Kaspar <zkaspar82@...il.com>
> Signed-off-by: Vitaly Kuznetsov <vkuznets@...hat.com>
Reviewed-by: Jim Mattson <jmattson@...gle.com>