| Message ID | 20240620160324.109058-2-Jonathan.Cameron@huawei.com |
|---|---|
| State | Superseded |
| Headers | show |
| Series | acpi: NUMA nodes for CXL HB as GP + complex NUMA test | expand |
On Thu, 20 Jun 2024 17:03:09 +0100 Jonathan Cameron <Jonathan.Cameron@huawei.com> wrote: > The ordering in ACPI specification [1] has bus number in the lowest byte. > As ACPI tables are little endian this is the reverse of the ordering > used by PCI_BUILD_BDF(). As a minimal fix split the QEMU BDF up > into bus and devfn and write them as single bytes in the correct > order. > > [1] ACPI Spec 6.3, Table 5.80 > > Fixes: 0a5b5acdf2d8 ("hw/acpi: Implement the SRAT GI affinity structure") > Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com> Reviewed-by: Igor Mammedov <imammedo@redhat.com> > > --- > v3: New patch. Note this code will go away, so this is intended for > backporting purposes > --- > hw/acpi/acpi_generic_initiator.c | 3 ++- > 1 file changed, 2 insertions(+), 1 deletion(-) > > diff --git a/hw/acpi/acpi_generic_initiator.c b/hw/acpi/acpi_generic_initiator.c > index 17b9a052f5..3d2b567999 100644 > --- a/hw/acpi/acpi_generic_initiator.c > +++ b/hw/acpi/acpi_generic_initiator.c > @@ -92,7 +92,8 @@ build_srat_generic_pci_initiator_affinity(GArray *table_data, int node, > > /* Device Handle - PCI */ > build_append_int_noprefix(table_data, handle->segment, 2); > - build_append_int_noprefix(table_data, handle->bdf, 2); > + build_append_int_noprefix(table_data, PCI_BUS_NUM(handle->bdf), 1); > + build_append_int_noprefix(table_data, PCI_BDF_TO_DEVFN(handle->bdf), 1); > for (index = 0; index < 12; index++) { > build_append_int_noprefix(table_data, 0, 1); > }
diff --git a/hw/acpi/acpi_generic_initiator.c b/hw/acpi/acpi_generic_initiator.c index 17b9a052f5..3d2b567999 100644 --- a/hw/acpi/acpi_generic_initiator.c +++ b/hw/acpi/acpi_generic_initiator.c @@ -92,7 +92,8 @@ build_srat_generic_pci_initiator_affinity(GArray *table_data, int node, /* Device Handle - PCI */ build_append_int_noprefix(table_data, handle->segment, 2); - build_append_int_noprefix(table_data, handle->bdf, 2); + build_append_int_noprefix(table_data, PCI_BUS_NUM(handle->bdf), 1); + build_append_int_noprefix(table_data, PCI_BDF_TO_DEVFN(handle->bdf), 1); for (index = 0; index < 12; index++) { build_append_int_noprefix(table_data, 0, 1); }
The ordering in ACPI specification [1] has bus number in the lowest byte. As ACPI tables are little endian this is the reverse of the ordering used by PCI_BUILD_BDF(). As a minimal fix split the QEMU BDF up into bus and devfn and write them as single bytes in the correct order. [1] ACPI Spec 6.3, Table 5.80 Fixes: 0a5b5acdf2d8 ("hw/acpi: Implement the SRAT GI affinity structure") Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com> --- v3: New patch. Note this code will go away, so this is intended for backporting purposes --- hw/acpi/acpi_generic_initiator.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-)