Here's a bug: guest thinks it can eject VGA device and ISA bridge. [root@dhcp74-172 ~]#lspci 00:00.0 Host bridge: Intel Corporation 440FX - 82441FX PMC [Natoma] (rev 02) 00:01.0 ISA bridge: Intel Corporation 82371SB PIIX3 ISA [Natoma/Triton II] 00:01.1 IDE interface: Intel Corporation 82371SB PIIX3 IDE [Natoma/Triton II] 00:01.3 Bridge: Intel Corporation 82371AB/EB/MB PIIX4 ACPI (rev 03) 00:02.0 VGA compatible controller: Cirrus Logic GD 5446 00:03.0 PCI bridge: Red Hat, Inc. Device 0001 00:04.0 Ethernet controller: Qumranet, Inc. Virtio network device 00:05.0 SCSI storage controller: Qumranet, Inc. Virtio block device 01:00.0 Ethernet controller: Intel Corporation 82540EM Gigabit Ethernet Controller (rev 03) [root@dhcp74-172 ~]# ls /sys/bus/pci/slots/1/ adapter address attention latch module power [root@dhcp74-172 ~]# ls /sys/bus/pci/slots/2/ adapter address attention latch module power [root@dhcp74-172 ~]# echo 0 > /sys/bus/pci/slots/2/power [root@dhcp74-172 ~]# lspci 00:00.0 Host bridge: Intel Corporation 440FX - 82441FX PMC [Natoma] (rev 02) 00:01.0 ISA bridge: Intel Corporation 82371SB PIIX3 ISA [Natoma/Triton II] 00:01.1 IDE interface: Intel Corporation 82371SB PIIX3 IDE [Natoma/Triton II] 00:01.3 Bridge: Intel Corporation 82371AB/EB/MB PIIX4 ACPI (rev 03) 00:03.0 PCI bridge: Red Hat, Inc. Device 0001 00:04.0 Ethernet controller: Qumranet, Inc. Virtio network device 00:05.0 SCSI storage controller: Qumranet, Inc. Virtio block device 01:00.0 Ethernet controller: Intel Corporation 82540EM Gigabit Ethernet Controller (rev 03) This is wrong because slots 1 and 2 are marked as not hotpluggable in qemu. The reason is that our acpi tables declare both _RMV with value 0, and _EJ0 method for these slots. What happens in this case is undocumented by ACPI spec, so linux ignores _RMV, and windows seems to ignore _EJ0. The correct way to suppress hotplug is not to have _EJ0, so this is what this patch does: it probes PIIX and modifies DSDT to match. With these patches applied, we get: [root@dhcp74-172 ~]# ls /sys/bus/pci/slots/1/ address [root@dhcp74-172 ~]# ls /sys/bus/pci/slots/2/ address I had to add a bit of compile-time infrastructure to handle the runtime patching in a simple way. I expect that it will be possible to reuse it if we need to patch other methods in the future. Michael S. Tsirkin (4): acpi: generate mixed asl/aml listing acpi: add aml/asl parsing script acpi: EJ0 method name patching acpi: remove _RMV Makefile | 10 ++-- src/acpi-dsdt.dsl | 58 +++-------------------- src/acpi.c | 11 ++++ src/find_ej0.pl | 136 +++++++++++++++++++++++++++++++++++++++++++++++++++++ src/splitdsl.pl | 16 ++++++ 5 files changed, 176 insertions(+), 55 deletions(-) create mode 100755 src/find_ej0.pl create mode 100755 src/splitdsl.pl -- 1.7.5.53.gc233e -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
