Re: [PATCH v4 3/4] qemu: command: add support to enable/disable hotplug on pci-root controller

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On 9/27/21 12:54 AM, Ani Sinha wrote:


On Sun, 26 Sep 2021, Laine Stump wrote:

+            QEMU_CAPS_PIIX_ACPI_ROOT_PCI_HOTPLUG);
+    DO_TEST_PARSE_ERROR_NOCAPS("pc-i440fx-acpi-root-hotplug-enable");

Ah, now I understand the origin of pc-i440fx-acpi-root-hotplug-enable.xml in
the previous patch - you had created it to be test case  for this negative
test. Actually I think the negative test should be done using the ...-disable
test case with no caps; in the case that someone has "hotplug='on'" and the
option is missing, I think we should just ignore it, since "hotplug='on'" is
what they're going to get anyway (that could be added into the validation that
was added in the previous patch). You still you add the -enable test case to
qemuxml2xmltest.c as I suggested in the previous patch.

No. Lets make hotplug=on/off explicit either way. Qemu defaults keep
changing :-)

Yes, now that there is a settable property its default can be changed, but we do know that on all versions of QEMU that don't support setting this property, hotplug is always enabled for pci-root. Anyway, this isn't important - we can always relax it later if someone really wants it.




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