linux-kernel - Re: [Patch v2 2/2] KVM: x86: deliver KVM IOAPIC scan request to target vCPUs

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Message-ID: <26daac23-6605-07ee-48f1-f8941fc02f64@redhat.com>
Date:   Fri, 15 Nov 2019 06:45:52 -0500
From:   Nitesh Narayan Lal <nitesh@...hat.com>
To:     Paolo Bonzini <pbonzini@...hat.com>, kvm@...r.kernel.org,
        linux-kernel@...r.kernel.org, mtosatti@...hat.com,
        rkrcmar@...hat.com, vkuznets@...hat.com,
        sean.j.christopherson@...el.com, wanpengli@...cent.com,
        jmattson@...gle.com, joro@...tes.org
Subject: Re: [Patch v2 2/2] KVM: x86: deliver KVM IOAPIC scan request to
 target vCPUs


On 11/15/19 5:26 AM, Paolo Bonzini wrote:
> On 07/11/19 13:53, Nitesh Narayan Lal wrote:
>> In IOAPIC fixed delivery mode instead of flushing the scan
>> requests to all vCPUs, we should only send the requests to
>> vCPUs specified within the destination field.
>>
>> This patch introduces kvm_get_dest_vcpus_mask() API which
>> retrieves an array of target vCPUs by using
>> kvm_apic_map_get_dest_lapic() and then based on the
>> vcpus_idx, it sets the bit in a bitmap. However, if the above
>> fails kvm_get_dest_vcpus_mask() finds the target vCPUs by
>> traversing all available vCPUs. Followed by setting the
>> bits in the bitmap.
> Queued, thanks.  I just took the liberty of renaming the function to
> kvm_bitmap_or_dest_vcpus.

Sure, thank you.

>
> Paolo
>
-- 
Nitesh



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