Make hot-plug/hot-unplug on PCIe Root Ports optional to allow libvirt
manage it and restrict unplug for the whole machine. This is going to
prevent user-initiated unplug in guests (Windows mostly).
Hotplug is enabled by default.
Usage:
-device pcie-root-port,hotplug=off,...
If you want to disable hot-unplug on some downstream ports of one
switch, disable hot-unplug on PCIe Root Port connected to the upstream
port as well as on the selected downstream ports.
Discussion related:
https://lists.gnu.org/archive/html/qemu-devel/2020-02/msg00530.html
Signed-off-by: Julia Suvorova <address@hidden>
---
v1: https://lists.gnu.org/archive/html/qemu-devel/2020-02/msg04868.html
v2: https://lists.gnu.org/archive/html/qemu-devel/2020-02/msg05192.html
* change name of the option to 'enable-hotplug' [Laine]
* change order of enabling capability bits [Igor]
* enable HPS bit [Igor]
* add option to xio3130_downstream [Ján]
v3:
* change name of the option to 'hotplug'. Naming is hard! [Laine]
* move property under TYPE_PCIE_SLOT [Michael]
hw/pci-bridge/pcie_root_port.c | 2 +-
hw/pci-bridge/xio3130_downstream.c | 2 +-
hw/pci/pcie.c | 11 +++++++----
hw/pci/pcie_port.c | 1 +
include/hw/pci/pcie.h | 2 +-
include/hw/pci/pcie_port.h | 3 +++
6 files changed, 14 insertions(+), 7 deletions(-)