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hw/pci/pcie: Do not set HPC flag if acpihp is used

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Instead of changing the hot-plug type in _OSC register, do not
set the 'Hot-Plug Capable' flag. This way guest will choose ACPI
hot-plug if it is preferred and leave the option to use SHPC with
pcie-pci-bridge.

The ability to control hot-plug for each downstream port is retained,
while 'hotplug=off' on the port means all hot-plug types are disabled.

Signed-off-by: Julia Suvorova <jusual@redhat.com>
Reviewed-by: Igor Mammedov <imammedo@redhat.com>
Reviewed-by: Marcel Apfelbaum <marcel.apfelbaum@gmail.com>
Reviewed-by: David Gibson <david@gibson.dropbear.id.au>
Message-Id: <20210713004205.775386-4-jusual@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
This commit is contained in:
Julia Suvorova 2021-07-13 02:42:02 +02:00 • committed by Michael S. Tsirkin
parent c0e427d6eb
commit 3f3cbbb236
6 changed files with 31 additions and 3 deletions
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8
hw/pci/pcie.c
View file

@ -529,7 +529,13 @@ void pcie_cap_slot_init(PCIDevice *dev, PCIESlot *s)
PCI_EXP_SLTCAP_PIP |
PCI_EXP_SLTCAP_AIP |
PCI_EXP_SLTCAP_ABP);
if (s->hotplug) {
/*
* Enable native hot-plug on all hot-plugged bridges unless
* hot-plug is disabled on the slot.
*/
if (s->hotplug &&
(s->native_hotplug || DEVICE(dev)->hotplugged)) {
pci_long_test_and_set_mask(dev->config + pos + PCI_EXP_SLTCAP,
PCI_EXP_SLTCAP_HPS |
PCI_EXP_SLTCAP_HPC);