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Re: [PATCH 0/8] Force detach PCI devices for ACPI-based and PCIe native hot-unplug
- To: Dongli Zhang <dongli.zhang@xxxxxxxxxx>
- From: "Michael S. Tsirkin" <mst@xxxxxxxxxx>
- Date: Mon, 7 Sep 2026 17:16:34 -0400
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- Cc: Igor Mammedov <imammedo@xxxxxxxxxx>, Daniel P. Berrangé <berrange@xxxxxxxxxx>, qemu-devel@xxxxxxxxxx, qemu-s390x@xxxxxxxxxx, xen-devel@xxxxxxxxxxxxxxxxxxxx, dave@xxxxxxxxxxx, anisinha@xxxxxxxxxx, philmd@xxxxxxxxx, aurelien@xxxxxxxxxxx, mjrosato@xxxxxxxxxxxxx, alifm@xxxxxxxxxxxxx, farman@xxxxxxxxxxxxx, richard.henderson@xxxxxxxxxx, iii@xxxxxxxxxxxxx, david@xxxxxxxxxx, pasic@xxxxxxxxxxxxx, borntraeger@xxxxxxxxxxxxx, cohuck@xxxxxxxxxx, alex@xxxxxxxxxxx, clg@xxxxxxxxxx, akrowiak@xxxxxxxxxxxxx, jjherne@xxxxxxxxxxxxx, sstabellini@xxxxxxxxxx, anthony@xxxxxxxxxxxxxx, edgar.iglesias@xxxxxxxxx, pbonzini@xxxxxxxxxx, eblake@xxxxxxxxxx, armbru@xxxxxxxxxx, joe.jin@xxxxxxxxxx
- Delivery-date: Mon, 07 Sep 2026 21:16:50 +0000
- List-id: Xen developer discussion <xen-devel.lists.xenproject.org>
On Mon, Sep 07, 2026 at 02:06:29PM -0700, Dongli Zhang wrote:
> 5. By instrumenting QEMU code and possibly adding additional metadata, we can
> track whether a PCI device has been accessed by the guest VM, especially
> during
> PCI hotplug. If the device has never been used by the guest VM, it may be
> safer
> to force-detach it.
this last one I am not sure about. as I said, devices are commonly
accessed by firmware.
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