From 0d33415a4eafe532f3beef8272811d927236a353 Mon Sep 17 00:00:00 2001 From: Gerd Hoffmann Date: Thu, 11 Nov 2021 14:08:58 +0100 Subject: 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 Message-Id: <20211111130859.1171890-6-kraxel@redhat.com> Reviewed-by: Michael S. Tsirkin Signed-off-by: Michael S. Tsirkin --- hw/pci/pcie.c | 10 ++++++++++ 1 file changed, 10 insertions(+) (limited to 'hw/pci') diff --git a/hw/pci/pcie.c b/hw/pci/pcie.c index 959bf074b2..a930ac738a 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); } -- cgit v1.2.3