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s390x/pci: add common function measurement block

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Common function measurement block is used to report zPCI internal
counters of successful pcilg/stg/stb and rpcit instructions to
a memory location provided by the program.

This patch introduces a new ZpciFmb structure and schedules a timer
callback to copy the zPCI measures to the FMB in the guest memory
at an interval time set to 4s.

An error while attemping to update the FMB, would generate an error
event to the guest.

The pcilg/stg/stb and rpcit interception handlers increase the
related counter on a successful call.
The guest shall pass a null FMBA (FMB address) in the FIB (Function
Information Block) when it issues a Modify PCI Function Control
instruction to switch off FMB and stop the corresponding timer.

Signed-off-by: Yi Min Zhao <zyimin@linux.ibm.com>
Signed-off-by: Pierre Morel <pmorel@linux.ibm.com>
Message-Id: <1546969050-8884-2-git-send-email-pmorel@linux.ibm.com>
Acked-by: David Hildenbrand <david@redhat.com>
Reviewed-by: Collin Walling <walling@linux.ibm.com>
Signed-off-by: Cornelia Huck <cohuck@redhat.com>
This commit is contained in:
Yi Min Zhao 2019-01-08 18:37:30 +01:00 • committed by Cornelia Huck
parent 3549f8c9e4
commit 6e92c70c37
4 changed files with 163 additions and 4 deletions
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4
hw/s390x/s390-pci-bus.c
View file

@ -1000,6 +1000,7 @@ static void s390_pcihost_unplug(HotplugHandler *hotplug_dev, DeviceState *dev,
bus = pci_get_bus(pci_dev);
devfn = pci_dev->devfn;
object_unparent(OBJECT(pci_dev));
fmb_timer_free(pbdev);
s390_pci_msix_free(pbdev);
s390_pci_iommu_free(s, bus, devfn);
pbdev->pdev = NULL;
@ -1148,6 +1149,7 @@ static void s390_pci_device_realize(DeviceState *dev, Error **errp)
}
zpci->state = ZPCI_FS_RESERVED;
zpci->fmb.format = ZPCI_FMB_FORMAT;
}
static void s390_pci_device_reset(DeviceState *dev)
@ -1172,7 +1174,7 @@ static void s390_pci_device_reset(DeviceState *dev)
pci_dereg_ioat(pbdev->iommu);
}
pbdev->fmb_addr = 0;
fmb_timer_free(pbdev);
}
static void s390_pci_get_fid(Object *obj, Visitor *v, const char *name,