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s390x/pci: fix endianness issues

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The zPCI group and function structures are big endian. However, we do
not consistently store them as big endian locally, and are missing some
conversions.

Let's just store the structures as host endian instead and convert to
big endian when actually handling the instructions retrieving the data.

Also fix the layout of ClpReqQueryPciGrp: g is actually only 8 bit. This
also fixes accesses on little endian hosts, and makes accesses on big
endian hosts consistent.

Fixes: 28dc86a072 ("s390x/pci: use a PCI Group structure")
Fixes: 9670ee7527 ("s390x/pci: use a PCI Function structure")
Fixes: 1e7552ff5c ("s390x/pci: get zPCI function info from host")
Signed-off-by: Cornelia Huck <cohuck@redhat.com>
Tested-by: Matthew Rosato <mjrosato@linux.ibm.com>
Tested-by: Thomas Huth <thuth@redhat.com>
Reviewed-by: Matthew Rosato <mjrosato@linux.ibm.com>
Reviewed-by: Thomas Huth <thuth@redhat.com>
Message-Id: <20201118104202.1301363-1-cohuck@redhat.com>
This commit is contained in:
Cornelia Huck 2020-11-18 11:42:02 +01:00
parent e67ad058e4
commit a4e2fff1b1
4 changed files with 29 additions and 17 deletions
Download patch file Download diff file Expand all files Collapse all files

12
hw/s390x/s390-pci-vfio.c
View file

@ -156,12 +156,12 @@ static void s390_pci_read_group(S390PCIBusDevice *pbdev,
if (cap->flags & VFIO_DEVICE_INFO_ZPCI_FLAG_REFRESH) {
resgrp->fr = 1;
}
stq_p(&resgrp->dasm, cap->dasm);
stq_p(&resgrp->msia, cap->msi_addr);
stw_p(&resgrp->mui, cap->mui);
stw_p(&resgrp->i, cap->noi);
stw_p(&resgrp->maxstbl, cap->maxstbl);
stb_p(&resgrp->version, cap->version);
resgrp->dasm = cap->dasm;
resgrp->msia = cap->msi_addr;
resgrp->mui = cap->mui;
resgrp->i = cap->noi;
resgrp->maxstbl = cap->maxstbl;
resgrp->version = cap->version;
}
}