Re: [PATCH v3 4/5] tests/qtest/hd-geo-test: fix test by removing unnecessary pcie-root-port

["Michael S. Tsirkin" <mst@redhat.com>]

On Mon, Jun 26, 2023 at 03:30:14PM +0200, Igor Mammedov wrote:
> On Mon, 26 Jun 2023 18:13:05 +0530
> Ani Sinha <anisinha@redhat.com> wrote:
> 
> > The test attaches both a SCSI controller and a pcie-to-pci bridge on the same
> > pcie-root-port.
> 
> at slot addresses ...
> > This is incorrect since only one downstream device can be
> > attached to a pcie-root-port.
> not true in case of multifunction 
> perhaps
>   s/only one downstream device/a downstream device/
>   s/can be attached to/can be attached to slot 0/

The limitation is that devices can only be attached to slot 0.

BTW once we have ARI all these checks will have to be rewritten.



> also point out mess with pcie.0 bus name used for as id for bridge.
> 
> > Further, in the test scenario, there is no need
> > to attach a pcie-root-port to the root complex. A SCSI controller can be
> > attached to a pcie-to-pci bridge which in turn can be directly attached to the
> > root bus (peie.0). Fix the test and simplify it.
> > 
> > CC: mst@redhat.com
> > CC: imammedo@redhat.com
> > CC: Michael Labiuk <michael.labiuk@virtuozzo.com>
> > 
> > Signed-off-by: Ani Sinha <anisinha@redhat.com>
> > ---
> >  tests/qtest/hd-geo-test.c | 18 ++++++++----------
> >  1 file changed, 8 insertions(+), 10 deletions(-)
> > 
> > diff --git a/tests/qtest/hd-geo-test.c b/tests/qtest/hd-geo-test.c
> > index 5aa258a2b3..d08bffad91 100644
> > --- a/tests/qtest/hd-geo-test.c
> > +++ b/tests/qtest/hd-geo-test.c
> > @@ -784,14 +784,12 @@ static void test_override_scsi(void)
> >      test_override(args, "pc", expected);
> >  }
> >  
> > -static void setup_pci_bridge(TestArgs *args, const char *id, const char *rootid)
> > +static void setup_pci_bridge(TestArgs *args, const char *id)
> >  {
> >  
> > -    char *root, *br;
> > -    root = g_strdup_printf("-device pcie-root-port,id=%s", rootid);
> > -    br = g_strdup_printf("-device pcie-pci-bridge,bus=%s,id=%s", rootid, id);
> > +    char *br;
> > +    br = g_strdup_printf("-device pcie-pci-bridge,bus=pcie.0,id=%s", id);
> >  
> > -    args->argc = append_arg(args->argc, args->argv, ARGV_SIZE, root);
> >      args->argc = append_arg(args->argc, args->argv, ARGV_SIZE, br);
> >  }
> >  
> > @@ -811,8 +809,8 @@ static void test_override_scsi_q35(void)
> >      add_drive_with_mbr(args, empty_mbr, 1);
> >      add_drive_with_mbr(args, empty_mbr, 1);
> >      add_drive_with_mbr(args, empty_mbr, 1);
> > -    setup_pci_bridge(args, "pcie.0", "br");
> > -    add_scsi_controller(args, "lsi53c895a", "br", 3);
> > +    setup_pci_bridge(args, "pcie-pci-br");
> > +    add_scsi_controller(args, "lsi53c895a", "pcie-pci-br", 3);
> >      add_scsi_disk(args, 0, 0, 0, 0, 0, 10000, 120, 30);
> >      add_scsi_disk(args, 1, 0, 0, 1, 0, 9000, 120, 30);
> >      add_scsi_disk(args, 2, 0, 0, 2, 0, 1, 0, 0);
> > @@ -868,9 +866,9 @@ static void test_override_virtio_blk_q35(void)
> >      };
> >      add_drive_with_mbr(args, empty_mbr, 1);
> >      add_drive_with_mbr(args, empty_mbr, 1);
> > -    setup_pci_bridge(args, "pcie.0", "br");
> > -    add_virtio_disk(args, 0, "br", 3, 10000, 120, 30);
> > -    add_virtio_disk(args, 1, "br", 4, 9000, 120, 30);
> > +    setup_pci_bridge(args, "pcie-pci-br");
> > +    add_virtio_disk(args, 0, "pcie-pci-br", 3, 10000, 120, 30);
> > +    add_virtio_disk(args, 1, "pcie-pci-br", 4, 9000, 120, 30);
> >      test_override(args, "q35", expected);
> >  }
> >