From:   Michael Ellerman <patch-notifications@ellerman.id.au>
To:     Sean Christopherson <seanjc@google.com>,
        Michael Ellerman <mpe@ellerman.id.au>
Cc:     Paolo Bonzini <pbonzini@redhat.com>,
        Sachin Sant <sachinp@linux.vnet.ibm.com>,
        linuxppc-dev@lists.ozlabs.org, linux-kernel@vger.kernel.org,
        Nicholas Piggin <npiggin@gmail.com>
In-Reply-To: <20211213174556.3871157-1-seanjc@google.com>
References: <20211213174556.3871157-1-seanjc@google.com>
Subject: Re: [PATCH] KVM: PPC: Book3S HV P9: Use kvm_arch_vcpu_get_wait() to get rcuwait object
Message-Id: <163952881459.928111.11067384310708851429.b4-ty@ellerman.id.au>
Date:   Wed, 15 Dec 2021 11:40:14 +1100
MIME-Version: 1.0
Content-Type: text/plain; charset="utf-8"
Content-Transfer-Encoding: 8bit
Precedence: bulk

On Mon, 13 Dec 2021 17:45:56 +0000, Sean Christopherson wrote:
> Use kvm_arch_vcpu_get_wait() to get a vCPU's rcuwait object instead of
> using vcpu->wait directly in kvmhv_run_single_vcpu().  Functionally, this
> is a nop as vcpu->arch.waitp is guaranteed to point at vcpu->wait.  But
> that is not obvious at first glance, and a future change coming in via
> the KVM tree, commit 510958e99721 ("KVM: Force PPC to define its own
> rcuwait object"), will hide vcpu->wait from architectures that define
> __KVM_HAVE_ARCH_WQP to prevent generic KVM from attepting to wake a vCPU
> with the wrong rcuwait object.
> 
> [...]

Applied to powerpc/next.

[1/1] KVM: PPC: Book3S HV P9: Use kvm_arch_vcpu_get_wait() to get rcuwait object
      https://git.kernel.org/powerpc/c/63fa47ba886b86cbd58f03b3b01b04bd57a1f233

cheers