On 8/2/19 3:30 PM, Peter Krempa wrote:
On Fri, Aug 02, 2019 at 15:15:59 +0200, Boris Fiuczynski wrote:
Add support to specify a boot order on vfio-ccw passthrough devices.
Signed-off-by: Boris Fiuczynski <fiuczy@xxxxxxxxxxxxx>
Acked-by: Jason J. Herne <jjherne@xxxxxxxxxxxxx>
Reviewed-by: Marc Hartmayer <mhartmay@xxxxxxxxxxxxx>
---
src/qemu/qemu_command.c | 27 +++++++++++++----
.../hostdev-subsys-mdev-vfio-ccw-boot.args | 29 +++++++++++++++++++
.../hostdev-subsys-mdev-vfio-ccw-boot.xml | 23 +++++++++++++++
tests/qemuxml2argvtest.c | 4 +++
4 files changed, 78 insertions(+), 5 deletions(-)
create mode 100644 tests/qemuxml2argvdata/hostdev-subsys-mdev-vfio-ccw-boot.args
create mode 100644 tests/qemuxml2argvdata/hostdev-subsys-mdev-vfio-ccw-boot.xml
Note that I don't currently have enough information to verify that the
mdev claim is correct (e.g. why it's only with CCW devices?), but I have
two formal comments:
Since I know that on s390 you can boot from a vfio-ccw mediated device
but not from a vfio-ap mediated device I chose the default as "not
capable to boot from" and check especially for the "known to be capable
to boot from" mdevs. I have no problem changing the logic if desired.
If we want to skip the checking than an qemu internal error like this
occurs:
error: Failed to start domain mini-ap
error: internal error: qemu unexpectedly closed the monitor:
2019-08-05T13:44:27.871697Z qemu-system-s390x: -device
vfio-ap,id=hostdev0,sysfsdev=/sys/bus/mdev/devices/9063cba3-ecef-47b6-abcf-3fef4fdcad85,bootindex=1:
Property '.bootindex' not found
diff --git a/src/qemu/qemu_command.c b/src/qemu/qemu_command.c
index fee51158a9..36138e2ccf 100644
--- a/src/qemu/qemu_command.c
+++ b/src/qemu/qemu_command.c
@@ -5613,6 +5613,9 @@ qemuBuildHostdevMediatedDevStr(const virDomainDef *def,
if (qemuBuildDeviceAddressStr(&buf, def, dev->info, qemuCaps) < 0)
goto cleanup;
+ if (dev->info->bootIndex)
+ virBufferAsprintf(&buf, ",bootindex=%u", dev->info->bootIndex);
+
if (virBufferCheckError(&buf) < 0)
goto cleanup;
@@ -5624,6 +5627,22 @@ qemuBuildHostdevMediatedDevStr(const virDomainDef *def,
return ret;
}
+static bool
+qemuHostdevSupportsBoot(virDomainHostdevDefPtr hostdev)
Refactor to this function should be separate from the logic change
below.
Agreed.
+{
+ if (hostdev->mode == VIR_DOMAIN_HOSTDEV_MODE_SUBSYS) {
+ virDomainHostdevSubsysPtr subsys = &hostdev->source.subsys;
+ if (subsys->type == VIR_DOMAIN_HOSTDEV_SUBSYS_TYPE_PCI ||
+ subsys->type == VIR_DOMAIN_HOSTDEV_SUBSYS_TYPE_USB ||
+ subsys->type == VIR_DOMAIN_HOSTDEV_SUBSYS_TYPE_SCSI ||
+ (subsys->type == VIR_DOMAIN_HOSTDEV_SUBSYS_TYPE_MDEV &&
+ subsys->u.mdev.model == VIR_MDEV_MODEL_TYPE_VFIO_CCW)) {
This line is misaligned. Please make sure that it's clear that the above
line belongs to the term in the brackets.
I will fix it.
+ return true;
+ }
+ }
+ return false;
+}
+
static int
qemuBuildHostdevCommandLine(virCommandPtr cmd,
const virDomainDef *def,
@@ -5638,13 +5657,11 @@ qemuBuildHostdevCommandLine(virCommandPtr cmd,
char *devstr;
if (hostdev->info->bootIndex) {
- if (hostdev->mode != VIR_DOMAIN_HOSTDEV_MODE_SUBSYS ||
- (subsys->type != VIR_DOMAIN_HOSTDEV_SUBSYS_TYPE_PCI &&
- subsys->type != VIR_DOMAIN_HOSTDEV_SUBSYS_TYPE_USB &&
- subsys->type != VIR_DOMAIN_HOSTDEV_SUBSYS_TYPE_SCSI)) {
+ if (!qemuHostdevSupportsBoot(hostdev)) {
virReportError(VIR_ERR_CONFIG_UNSUPPORTED, "%s",
_("booting from assigned devices is only "
- "supported for PCI, USB and SCSI devices"));
+ "supported for PCI, USB, SCSI and MDEV "
+ "of model vfio-ccw devices"));
Ideally this validation will be done in the validation callback rather
than in the command line generator. (pre-existing so I don't require you
to refactor this at this time). >
Also this error can be probably stashed into qemuHostdevSupportsBoot.
(and name it like qemuHostdevValidateBoot).
Ok, I will rename the method and move the error report.
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Mit freundlichen Grüßen/Kind regards
Boris Fiuczynski
IBM Deutschland Research & Development GmbH
Vorsitzender des Aufsichtsrats: Matthias Hartmann
Geschäftsführung: Dirk Wittkopp
Sitz der Gesellschaft: Böblingen
Registergericht: Amtsgericht Stuttgart, HRB 243294
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