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qemu: caps: Aggregate all caps post-processing into a function

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Some caps are cleared according to some more advanced logic after
detection. Split all that logic out into virQEMUCapsInitProcessCaps.

Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Erik Skultety <eskultet@redhat.com>
This commit is contained in:
Peter Krempa 2019-03-29 09:12:09 +01:00
parent 87b906811b
commit 26dbc2e72a
1 changed files with 50 additions and 35 deletions
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85
src/qemu/qemu_capabilities.c
View File

@ -4212,6 +4212,55 @@ virQEMUCapsInitQMPVersionCaps(virQEMUCapsPtr qemuCaps)
}
/**
* virQEMUCapsInitProcessCaps:
* @qemuCaps: QEMU capabilities
*
* Some capability bits are enabled or disabled according to specific logic.
* This function collects all capability processing after the capabilities
* are detected.
*/
static void
virQEMUCapsInitProcessCaps(virQEMUCapsPtr qemuCaps)
{
/* 'intel-iommu' shows up as a device since 2.2.0, but can
* not be used with -device until 2.7.0. Before that it
* requires -machine iommu=on. So we must clear the device
* capability we detected on older QEMUs
*/
if (qemuCaps->version < 2007000 &&
virQEMUCapsGet(qemuCaps, QEMU_CAPS_DEVICE_INTEL_IOMMU)) {
virQEMUCapsClear(qemuCaps, QEMU_CAPS_DEVICE_INTEL_IOMMU);
virQEMUCapsSet(qemuCaps, QEMU_CAPS_MACHINE_IOMMU);
}
/* Prealloc on NVDIMMs is broken on older QEMUs leading to
* user data corruption. If we are dealing with such version
* of QEMU pretend we don't know how to NVDIMM. */
if (qemuCaps->version < 2009000 &&
virQEMUCapsGet(qemuCaps, QEMU_CAPS_DEVICE_NVDIMM))
virQEMUCapsClear(qemuCaps, QEMU_CAPS_DEVICE_NVDIMM);
if (ARCH_IS_X86(qemuCaps->arch) &&
virQEMUCapsGet(qemuCaps, QEMU_CAPS_QUERY_CPU_MODEL_EXPANSION))
virQEMUCapsSet(qemuCaps, QEMU_CAPS_CPU_CACHE);
if (ARCH_IS_S390(qemuCaps->arch)) {
/* Legacy assurance for QEMU_CAPS_CCW */
if (!virQEMUCapsGet(qemuCaps, QEMU_CAPS_CCW) &&
virQEMUCapsGet(qemuCaps, QEMU_CAPS_VIRTIO_CCW))
virQEMUCapsSet(qemuCaps, QEMU_CAPS_CCW);
if (!virQEMUCapsGet(qemuCaps, QEMU_CAPS_CCW_CSSID_UNRESTRICTED))
virQEMUCapsClear(qemuCaps, QEMU_CAPS_DEVICE_VFIO_CCW);
}
/* To avoid guest ABI regression, blockdev shall be enabled only when
* we are able to pass the custom 'device_id' for SCSI disks and cdroms. */
if (!virQEMUCapsGet(qemuCaps, QEMU_CAPS_SCSI_DISK_DEVICE_ID))
virQEMUCapsClear(qemuCaps, QEMU_CAPS_BLOCKDEV);
}
static int
virQEMUCapsProbeQMPSchemaCapabilities(virQEMUCapsPtr qemuCaps,
qemuMonitorPtr mon)
@ -4320,17 +4369,6 @@ virQEMUCapsInitQMPMonitor(virQEMUCapsPtr qemuCaps,
if (virQEMUCapsProbeQMPHostCPU(qemuCaps, mon, false) < 0)
goto cleanup;
/* 'intel-iommu' shows up as a device since 2.2.0, but can
* not be used with -device until 2.7.0. Before that it
* requires -machine iommu=on. So we must clear the device
* capability we detected on older QEMUs
*/
if (qemuCaps->version < 2007000 &&
virQEMUCapsGet(qemuCaps, QEMU_CAPS_DEVICE_INTEL_IOMMU)) {
virQEMUCapsClear(qemuCaps, QEMU_CAPS_DEVICE_INTEL_IOMMU);
virQEMUCapsSet(qemuCaps, QEMU_CAPS_MACHINE_IOMMU);
}
/* GIC capabilities, eg. available GIC versions */
if ((qemuCaps->arch == VIR_ARCH_AARCH64 ||
qemuCaps->arch == VIR_ARCH_ARMV6L ||
@ -4338,26 +4376,6 @@ virQEMUCapsInitQMPMonitor(virQEMUCapsPtr qemuCaps,
virQEMUCapsProbeQMPGICCapabilities(qemuCaps, mon) < 0)
goto cleanup;
/* Prealloc on NVDIMMs is broken on older QEMUs leading to
* user data corruption. If we are dealing with such version
* of QEMU pretend we don't know how to NVDIMM. */
if (qemuCaps->version < 2009000 &&
virQEMUCapsGet(qemuCaps, QEMU_CAPS_DEVICE_NVDIMM))
virQEMUCapsClear(qemuCaps, QEMU_CAPS_DEVICE_NVDIMM);
if (ARCH_IS_X86(qemuCaps->arch) &&
virQEMUCapsGet(qemuCaps, QEMU_CAPS_QUERY_CPU_MODEL_EXPANSION))
virQEMUCapsSet(qemuCaps, QEMU_CAPS_CPU_CACHE);
if (ARCH_IS_S390(qemuCaps->arch)) {
/* Legacy assurance for QEMU_CAPS_CCW */
if (!virQEMUCapsGet(qemuCaps, QEMU_CAPS_CCW) &&
virQEMUCapsGet(qemuCaps, QEMU_CAPS_VIRTIO_CCW))
virQEMUCapsSet(qemuCaps, QEMU_CAPS_CCW);
if (!virQEMUCapsGet(qemuCaps, QEMU_CAPS_CCW_CSSID_UNRESTRICTED))
virQEMUCapsClear(qemuCaps, QEMU_CAPS_DEVICE_VFIO_CCW);
}
/* Probe for SEV capabilities */
if (virQEMUCapsGet(qemuCaps, QEMU_CAPS_SEV_GUEST)) {
int rc = virQEMUCapsProbeQMPSEVCapabilities(qemuCaps, mon);
@ -4369,10 +4387,7 @@ virQEMUCapsInitQMPMonitor(virQEMUCapsPtr qemuCaps,
virQEMUCapsClear(qemuCaps, QEMU_CAPS_SEV_GUEST);
}
/* To avoid guest ABI regression, blockdev shall be enabled only when
* we are able to pass the custom 'device_id' for SCSI disks and cdroms. */
if (!virQEMUCapsGet(qemuCaps, QEMU_CAPS_SCSI_DISK_DEVICE_ID))
virQEMUCapsClear(qemuCaps, QEMU_CAPS_BLOCKDEV);
virQEMUCapsInitProcessCaps(qemuCaps);
ret = 0;
cleanup: