On 25.11.14 11:11, Frank Blaschka wrote: > On Tue, Nov 18, 2014 at 06:00:40PM +0100, Alexander Graf wrote: >> >> >> On 18.11.14 13:50, Frank Blaschka wrote: >>> On Mon, Nov 10, 2014 at 04:14:16PM +0100, Alexander Graf wrote: >>>> >>>> >>>> On 10.11.14 15:20, Frank Blaschka wrote: >>>>> From: Frank Blaschka <frank.blasc...@de.ibm.com> >>>>> >>>>> This patch implements a pci bus for s390x together with infrastructure >>>>> to generate and handle hotplug events, to configure/unconfigure via >>>>> sclp instruction, to do iommu translations and provide s390 support for >>>>> MSI/MSI-X notification processing. >>>>> >>>>> Signed-off-by: Frank Blaschka <frank.blasc...@de.ibm.com> >> >> [...] >> >>>>> diff --git a/hw/s390x/s390-pci-bus.c b/hw/s390x/s390-pci-bus.c >>>>> new file mode 100644 >>>>> index 0000000..f2fa6ba >>>>> --- /dev/null >>>>> +++ b/hw/s390x/s390-pci-bus.c >>>>> @@ -0,0 +1,485 @@ >>>>> +/* >>>>> + * s390 PCI BUS >>>>> + * >>>>> + * Copyright 2014 IBM Corp. >>>>> + * Author(s): Frank Blaschka <frank.blasc...@de.ibm.com> >>>>> + * Hong Bo Li <lih...@cn.ibm.com> >>>>> + * Yi Min Zhao <zyi...@cn.ibm.com> >>>>> + * >>>>> + * This work is licensed under the terms of the GNU GPL, version 2 or (at >>>>> + * your option) any later version. See the COPYING file in the top-level >>>>> + * directory. >>>>> + */ >>>>> + >>>>> +#include <hw/pci/pci.h> >>>>> +#include <hw/pci/pci_bus.h> >>>>> +#include <hw/s390x/css.h> >>>>> +#include <hw/s390x/sclp.h> >>>>> +#include <hw/pci/msi.h> >>>>> +#include "qemu/error-report.h" >>>>> +#include "s390-pci-bus.h" >>>>> + >>>>> +/* #define DEBUG_S390PCI_BUS */ >>>>> +#ifdef DEBUG_S390PCI_BUS >>>>> +#define DPRINTF(fmt, ...) \ >>>>> + do { fprintf(stderr, "S390pci-bus: " fmt, ## __VA_ARGS__); } while >>>>> (0) >>>>> +#else >>>>> +#define DPRINTF(fmt, ...) \ >>>>> + do { } while (0) >>>>> +#endif >>>>> + >>>>> +static const unsigned long be_to_le = BITS_PER_LONG - 1; >>>>> +static QTAILQ_HEAD(, SeiContainer) pending_sei = >>>>> + QTAILQ_HEAD_INITIALIZER(pending_sei); >>>>> +static QTAILQ_HEAD(, S390PCIBusDevice) device_list = >>>>> + QTAILQ_HEAD_INITIALIZER(device_list); >>>> >>>> Please get rid of all statics ;). All state has to live in objects. >>>> >>> >>> be_to_le was misleading and unnecesary will remove this one but >>> static QTAILQ_HEAD seems to be a common practice for list anchors. >>> If you really want me to change this do you have any prefered way, >>> or can you point me to some code doing this? >> >> For PCI devices, I don't think you need a list at all. Your PHB device >> should already have a proper qbus that knows about all its child devices. > > OK > >> >> As for pending_sei, what is this about? >> > > This is a queue to store events (StoreEventInformation) used for hotplug > support. In case a device is pluged/unpluged an event is stored to this queue > and the guest is notified. Then the guest pick up the event information via > chsc instruction.
Is this for overall CCW or only for PCI? Depending on the answer, you can put the sei event list into the respective parent device. Alex