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| author | Gerd Hoffmann <kraxel@redhat.com> | 2021-11-11 14:08:58 +0100 |
|---|---|---|
| committer | Michael S. Tsirkin <mst@redhat.com> | 2021-11-15 11:10:11 -0500 |
| commit | 0d33415a4eafe532f3beef8272811d927236a353 (patch) | |
| tree | ae65f05cbfb33da512f753dbf7e1f5cd7fde8518 /hw/pci | |
| parent | 44242d4d3d082a28200fdbecaed5398122682e6e (diff) | |
| download | qemu-0d33415a4eafe532f3beef8272811d927236a353.zip qemu-0d33415a4eafe532f3beef8272811d927236a353.tar.gz qemu-0d33415a4eafe532f3beef8272811d927236a353.tar.bz2 | |
pcie: fast unplug when slot power is off
In case the slot is powered off (and the power indicator turned off too)
we can unplug right away, without round-trip to the guest.
Also clear pending attention button press, there is nothing to care
about any more.
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
Message-Id: <20211111130859.1171890-6-kraxel@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Diffstat (limited to 'hw/pci')
| -rw-r--r-- | hw/pci/pcie.c | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/hw/pci/pcie.c b/hw/pci/pcie.c index 959bf07..a930ac7 100644 --- a/hw/pci/pcie.c +++ b/hw/pci/pcie.c @@ -560,6 +560,16 @@ void pcie_cap_slot_unplug_request_cb(HotplugHandler *hotplug_dev, return; } + if (((sltctl & PCI_EXP_SLTCTL_PIC) == PCI_EXP_SLTCTL_PWR_IND_OFF) && + ((sltctl & PCI_EXP_SLTCTL_PCC) == PCI_EXP_SLTCTL_PWR_OFF)) { + /* slot is powered off -> unplug without round-trip to the guest */ + pcie_cap_slot_do_unplug(hotplug_pdev); + hotplug_event_notify(hotplug_pdev); + pci_word_test_and_clear_mask(exp_cap + PCI_EXP_SLTSTA, + PCI_EXP_SLTSTA_ABP); + return; + } + pcie_cap_slot_push_attention_button(hotplug_pdev); } |