| Message ID | 20211207210425.150923-2-mjrosato@linux.ibm.com |
|---|---|
| State | New |
| Headers | show |
| Series | s390x/pci: zPCI interpretation support | expand |
On 07/12/2021 22.04, Matthew Rosato wrote: > The current default PCI group being used can technically collide with a > real group ID passed from a hostdev. Let's instead use a group ID that > comes from a special pool (0xF0-0xFF) that is architected to be reserved > for simulated devices. Maybe mention that this is not a problem for migration since zPCI currently can't be migrated anyway (as mentioned in the discussion of an earlier version of this patch) Acked-by: Thomas Huth <thuth@redhat.com> > Fixes: 28dc86a072 ("s390x/pci: use a PCI Group structure") > Reviewed-by: Eric Farman <farman@linux.ibm.com> > Reviewed-by: Pierre Morel <pmorel@linux.ibm.com> > Signed-off-by: Matthew Rosato <mjrosato@linux.ibm.com> > --- > include/hw/s390x/s390-pci-bus.h | 2 +- > 1 file changed, 1 insertion(+), 1 deletion(-) > > diff --git a/include/hw/s390x/s390-pci-bus.h b/include/hw/s390x/s390-pci-bus.h > index aa891c178d..2727e7bdef 100644 > --- a/include/hw/s390x/s390-pci-bus.h > +++ b/include/hw/s390x/s390-pci-bus.h > @@ -313,7 +313,7 @@ typedef struct ZpciFmb { > } ZpciFmb; > QEMU_BUILD_BUG_MSG(offsetof(ZpciFmb, fmt0) != 48, "padding in ZpciFmb"); > > -#define ZPCI_DEFAULT_FN_GRP 0x20 > +#define ZPCI_DEFAULT_FN_GRP 0xFF > typedef struct S390PCIGroup { > ClpRspQueryPciGrp zpci_group; > int id; >
diff --git a/include/hw/s390x/s390-pci-bus.h b/include/hw/s390x/s390-pci-bus.h index aa891c178d..2727e7bdef 100644 --- a/include/hw/s390x/s390-pci-bus.h +++ b/include/hw/s390x/s390-pci-bus.h @@ -313,7 +313,7 @@ typedef struct ZpciFmb { } ZpciFmb; QEMU_BUILD_BUG_MSG(offsetof(ZpciFmb, fmt0) != 48, "padding in ZpciFmb"); -#define ZPCI_DEFAULT_FN_GRP 0x20 +#define ZPCI_DEFAULT_FN_GRP 0xFF typedef struct S390PCIGroup { ClpRspQueryPciGrp zpci_group; int id;
The current default PCI group being used can technically collide with a real group ID passed from a hostdev. Let's instead use a group ID that comes from a special pool (0xF0-0xFF) that is architected to be reserved for simulated devices. Fixes: 28dc86a072 ("s390x/pci: use a PCI Group structure") Reviewed-by: Eric Farman <farman@linux.ibm.com> Reviewed-by: Pierre Morel <pmorel@linux.ibm.com> Signed-off-by: Matthew Rosato <mjrosato@linux.ibm.com> --- include/hw/s390x/s390-pci-bus.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)