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pcie: add power indicator blink check 

Refuse to push the attention button in case the guest is busy with some
hotplug operation (as indicated by the power indicator blinking).

Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
Message-Id: <20211111130859.1171890-4-kraxel@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
This commit is contained in:
Gerd Hoffmann 2021-11-11 14:08:56 +01:00 committed by Michael S. Tsirkin
parent d5daff7d31
commit 81124b3c7a
1 changed files with 7 additions and 0 deletions
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7
hw/pci/pcie.c
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@ -506,6 +506,7 @@ void pcie_cap_slot_unplug_request_cb(HotplugHandler *hotplug_dev,
PCIDevice *hotplug_pdev = PCI_DEVICE(hotplug_dev);
uint8_t *exp_cap = hotplug_pdev->config + hotplug_pdev->exp.exp_cap;
uint32_t sltcap = pci_get_word(exp_cap + PCI_EXP_SLTCAP);
uint16_t sltctl = pci_get_word(exp_cap + PCI_EXP_SLTCTL);
/* Check if hot-unplug is disabled on the slot */
if ((sltcap & PCI_EXP_SLTCAP_HPC) == 0) {
@ -521,6 +522,12 @@ void pcie_cap_slot_unplug_request_cb(HotplugHandler *hotplug_dev,
return;
}
if ((sltctl & PCI_EXP_SLTCTL_PIC) == PCI_EXP_SLTCTL_PWR_IND_BLINK) {
error_setg(errp, "Hot-unplug failed: "
"guest is busy (power indicator blinking)");
return;
}
dev->pending_deleted_event = true;
/* In case user cancel the operation of multi-function hot-add,