linux-kernel - Re: [RFC PATCH 7/8] KVM: i8254: Remove need for irq ack notifier

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Message-ID: <ciirm8sgx1axi3.fsf@u54ee758033e858cfa736.ant.amazon.com>
Date:   Wed, 06 Feb 2019 13:53:56 +0100
From:   Julian Stecklina <jsteckli@...zon.de>
To:     Paolo Bonzini <pbonzini@...hat.com>
Cc:     "Suthikulpanit\, Suravee" <Suravee.Suthikulpanit@....com>,
        "linux-kernel\@vger.kernel.org" <linux-kernel@...r.kernel.org>,
        "kvm\@vger.kernel.org" <kvm@...r.kernel.org>,
        "x86\@kernel.org" <x86@...nel.org>,
        "joro\@8bytes.org" <joro@...tes.org>,
        "rkrcmar\@redhat.com" <rkrcmar@...hat.com>,
        "tglx\@linutronix.de" <tglx@...utronix.de>,
        "mingo\@redhat.com" <mingo@...hat.com>,
        "bp\@alien8.de" <bp@...en8.de>, "hpa\@zytor.com" <hpa@...or.com>,
        "sironi\@amazon.de" <sironi@...zon.de>,
        "wawei\@amazon.de" <wawei@...zon.de>
Subject: Re: [RFC PATCH 7/8] KVM: i8254: Remove need for irq ack notifier

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

> Alternatively, it is probably a good time to switch the default to split irqchip
> in QEMU.  Split irqchip was introduced in kernel 4.5, which was released about
> three years ago.

I totally agree. At some point, the in-kernel PIT/PIC emulation should
also be removed, but I guess it's too early to talk about this.

Julian