| Message ID | 20200123134805.1993-7-alexandru.elisei@arm.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | Add reassignable BARs and PCIE 1.1 support | expand |
On Thu, 23 Jan 2020 13:47:41 +0000 Alexandru Elisei <alexandru.elisei@arm.com> wrote: Hi, > The "bus-range" property encodes the PCI bus number of the PCI > controller and the largest bus number of any PCI buses that are > subordinate to this node [1]. kvmtool emulates only PCI bus 0. I am wondering if that ever becomes a limitation, but in the current context it looks like the right thing to do. > Advertise this in the PCI DT node by setting "bus-range" to <0,0>. > > [1] IEEE Std 1275-1994, Section 3 "Bus Nodes Properties and Methods" > > Signed-off-by: Alexandru Elisei <alexandru.elisei@arm.com> Reviewed-by: Andre Przywara <andre.przywara@arm.com> Cheers, Andre > --- > arm/pci.c | 2 +- > 1 file changed, 1 insertion(+), 1 deletion(-) > > diff --git a/arm/pci.c b/arm/pci.c > index 557cfa98938d..ed325fa4a811 100644 > --- a/arm/pci.c > +++ b/arm/pci.c > @@ -30,7 +30,7 @@ void pci__generate_fdt_nodes(void *fdt) > struct of_interrupt_map_entry irq_map[OF_PCI_IRQ_MAP_MAX]; > unsigned nentries = 0; > /* Bus range */ > - u32 bus_range[] = { cpu_to_fdt32(0), cpu_to_fdt32(1), }; > + u32 bus_range[] = { cpu_to_fdt32(0), cpu_to_fdt32(0), }; > /* Configuration Space */ > u64 cfg_reg_prop[] = { cpu_to_fdt64(KVM_PCI_CFG_AREA), > cpu_to_fdt64(ARM_PCI_CFG_SIZE), };
diff --git a/arm/pci.c b/arm/pci.c index 557cfa98938d..ed325fa4a811 100644 --- a/arm/pci.c +++ b/arm/pci.c @@ -30,7 +30,7 @@ void pci__generate_fdt_nodes(void *fdt) struct of_interrupt_map_entry irq_map[OF_PCI_IRQ_MAP_MAX]; unsigned nentries = 0; /* Bus range */ - u32 bus_range[] = { cpu_to_fdt32(0), cpu_to_fdt32(1), }; + u32 bus_range[] = { cpu_to_fdt32(0), cpu_to_fdt32(0), }; /* Configuration Space */ u64 cfg_reg_prop[] = { cpu_to_fdt64(KVM_PCI_CFG_AREA), cpu_to_fdt64(ARM_PCI_CFG_SIZE), };
The "bus-range" property encodes the PCI bus number of the PCI controller and the largest bus number of any PCI buses that are subordinate to this node [1]. kvmtool emulates only PCI bus 0. Advertise this in the PCI DT node by setting "bus-range" to <0,0>. [1] IEEE Std 1275-1994, Section 3 "Bus Nodes Properties and Methods" Signed-off-by: Alexandru Elisei <alexandru.elisei@arm.com> --- arm/pci.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)