From: Vitaly Kuznetsov <vkuznets@redhat.com>
To: Sean Christopherson <seanjc@google.com>
Cc: kvm@vger.kernel.org, Paolo Bonzini <pbonzini@redhat.com>,
Wanpeng Li <wanpengli@tencent.com>,
Jim Mattson <jmattson@google.com>,
Maxim Levitsky <mlevitsk@redhat.com>,
linux-kernel@vger.kernel.org
Subject: Re: [PATCH v3 3/4] KVM: nVMX: Track whether changes in L0 require MSR bitmap for L2 to be rebuilt
Date: Fri, 05 Nov 2021 13:06:20 +0100 [thread overview]
Message-ID: <875yt6lscj.fsf@vitty.brq.redhat.com> (raw)
In-Reply-To: <YYSDbljJgpEOnx+W@google.com>
Sean Christopherson <seanjc@google.com> writes:
> On Wed, Oct 13, 2021, Vitaly Kuznetsov wrote:
>> diff --git a/arch/x86/kvm/vmx/vmx.h b/arch/x86/kvm/vmx/vmx.h
>> index 592217fd7d92..2cdf66e6d1b0 100644
>> --- a/arch/x86/kvm/vmx/vmx.h
>> +++ b/arch/x86/kvm/vmx/vmx.h
>> @@ -148,6 +148,15 @@ struct nested_vmx {
>> bool need_vmcs12_to_shadow_sync;
>> bool dirty_vmcs12;
>>
>> + /*
>> + * Indicates whether MSR bitmap for L2 needs to be rebuilt due to
>> + * changes in MSR bitmap for L1 or switching to a different L2. Note,
>> + * this flag can only be used reliably in conjunction with a paravirt L1
>> + * which informs L0 whether any changes to MSR bitmap for L2 were done
>> + * on its side.
>> + */
>> + bool msr_bitmap_force_recalc;
>
> Belated bikeshedding... What about need_msr_bitmap_recalc to follow the above
> need_vmcs12_to_shadow_sync?
>
'msr_bitmap_force_recalc' was suggested by Paolo but
'need_msr_bitmap_recalc' sounds equally good to me.
>> +
>> /*
>> * Indicates lazily loaded guest state has not yet been decached from
>> * vmcs02.
>> --
>> 2.31.1
>>
>
--
Vitaly
next prev parent reply other threads:[~2021-11-05 12:06 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-10-13 14:22 [PATCH v3 0/4] KVM: nVMX: Enlightened MSR Bitmap feature for Hyper-V on KVM Vitaly Kuznetsov
2021-10-13 14:22 ` [PATCH v3 1/4] KVM: nVMX: Don't use Enlightened MSR Bitmap for L3 Vitaly Kuznetsov
2021-11-05 0:52 ` Sean Christopherson
2021-11-05 12:03 ` Vitaly Kuznetsov
2021-11-05 15:38 ` Maxim Levitsky
2021-11-05 15:39 ` Maxim Levitsky
2021-10-13 14:22 ` [PATCH v3 2/4] KVM: VMX: Introduce vmx_msr_bitmap_l01_changed() helper Vitaly Kuznetsov
2021-11-05 1:00 ` Sean Christopherson
2021-10-13 14:22 ` [PATCH v3 3/4] KVM: nVMX: Track whether changes in L0 require MSR bitmap for L2 to be rebuilt Vitaly Kuznetsov
2021-11-05 1:05 ` Sean Christopherson
2021-11-05 12:06 ` Vitaly Kuznetsov [this message]
2021-11-05 14:28 ` Sean Christopherson
2021-10-13 14:22 ` [PATCH v3 4/4] KVM: nVMX: Implement Enlightened MSR Bitmap feature Vitaly Kuznetsov
2021-11-05 1:09 ` Sean Christopherson
2021-11-05 12:08 ` Vitaly Kuznetsov
2021-11-03 15:13 ` [PATCH v3 0/4] KVM: nVMX: Enlightened MSR Bitmap feature for Hyper-V on KVM Vitaly Kuznetsov
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