| Message ID | 20230622103255.267289-5-anisinha@redhat.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | test and QEMU fixes to ensure proper PCIE device usage | expand |
On Thu, 22 Jun 2023 16:02:54 +0530 Ani Sinha <anisinha@redhat.com> wrote: > A SCSI controller can be attached to a pcie-to-pci bridge which in turn can be > attached directly to the root bus (peie.0). There is no need to attach a > pcie-root-port on the root bus in order to attach the pcie-ro-pci bridge. > Fix it. bridge can be both on pcie.0 or on root-port and both are valid configs. So what exactly and why we are fixing here? > > 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); > } >
> On 26-Jun-2023, at 4:45 PM, Igor Mammedov <imammedo@redhat.com> wrote: > > On Thu, 22 Jun 2023 16:02:54 +0530 > Ani Sinha <anisinha@redhat.com> wrote: > >> A SCSI controller can be attached to a pcie-to-pci bridge which in turn can be >> attached directly to the root bus (peie.0). There is no need to attach a >> pcie-root-port on the root bus in order to attach the pcie-ro-pci bridge. >> Fix it. > > bridge can be both on pcie.0 or on root-port and both are valid configs. > So what exactly and why we are fixing here? If you look at the functions carefully, “br” is a pcie-root-port and “pcie.0” is a pcie-to-pci bridge. The bug here is that both the SCSI controller and the pcie-to-pci bridge (pcie.0) were getting attached to the same pcie-root-port. I think the intention of the author was to attach the SCSI controller to pcie-to-pci bridge. In any case, I do not see the reason to attach a pcie-root-port here. We can attach the pcie-to-pci bridge on the RC and then attach the SCSI controllers on the bridge. > >> >> 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); >> } >> >
On Mon, 26 Jun 2023 17:01:29 +0530 Ani Sinha <anisinha@redhat.com> wrote: > > On 26-Jun-2023, at 4:45 PM, Igor Mammedov <imammedo@redhat.com> wrote: > > > > On Thu, 22 Jun 2023 16:02:54 +0530 > > Ani Sinha <anisinha@redhat.com> wrote: > > > >> A SCSI controller can be attached to a pcie-to-pci bridge which in turn can be > >> attached directly to the root bus (peie.0). There is no need to attach a > >> pcie-root-port on the root bus in order to attach the pcie-ro-pci bridge. > >> Fix it. > > > > bridge can be both on pcie.0 or on root-port and both are valid configs. > > So what exactly and why we are fixing here? > > If you look at the functions carefully, “br” is a pcie-root-port and “pcie.0” is a pcie-to-pci bridge. > The bug here is that both the SCSI controller and the pcie-to-pci bridge (pcie.0) were getting attached to the same pcie-root-port. I think the intention of the author was to attach the SCSI controller to pcie-to-pci bridge. > In any case, I do not see the reason to attach a pcie-root-port here. We can attach the pcie-to-pci bridge on the RC and then attach the SCSI controllers on the bridge. Description of what's wrong should be in commit message then you can follow up with a reasoning why you don't think it's worth fixing and what you do to remedy situation. > > > > >> > >> 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); > >> } > >> > > >
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); }
A SCSI controller can be attached to a pcie-to-pci bridge which in turn can be attached directly to the root bus (peie.0). There is no need to attach a pcie-root-port on the root bus in order to attach the pcie-ro-pci bridge. Fix 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(-)