linux-kernel - Re: [PATCH v7 10/39] KVM: x86: hyper-v: Don't use sparse_set_to_vcpu_mask() in kvm_hv_send

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Message-ID: <87tu8cydpg.fsf@redhat.com>
Date:   Wed, 22 Jun 2022 16:28:43 +0200
From:   Vitaly Kuznetsov <vkuznets@...hat.com>
To:     Paolo Bonzini <pbonzini@...hat.com>, kvm@...r.kernel.org
Cc:     Sean Christopherson <seanjc@...gle.com>,
        Maxim Levitsky <mlevitsk@...hat.com>,
        Wanpeng Li <wanpengli@...cent.com>,
        Jim Mattson <jmattson@...gle.com>,
        Michael Kelley <mikelley@...rosoft.com>,
        Siddharth Chandrasekaran <sidcha@...zon.de>,
        Yuan Yao <yuan.yao@...ux.intel.com>,
        linux-hyperv@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v7 10/39] KVM: x86: hyper-v: Don't use
 sparse_set_to_vcpu_mask() in kvm_hv_send_ipi()

Paolo Bonzini <pbonzini@...hat.com> writes:

> On 6/21/22 15:17, Vitaly Kuznetsov wrote:
>>>
>>> Just to be clear, PV IPI does*not*  support the VP_ID, right?
>> Hm, with Hyper-V PV IPI hypercall vCPUs are also addressed by their
>> VP_IDs, not by their APIC ids so similar to Hyper-V PV TLB flush we need
>> to convert the supplied set (either flat u64 bitmask of VP_IDs for
>> non-EX hypercall or a sparse set for -EX).
>> 
>
> So this means the series needs a v8, right?
>

No, I was just trying to explaini what the patch is doing in the series,
it looks good to me (but I'm biased, of course).

-- 
Vitaly