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arch: Add numa-node-id property to CPU node

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For the purpose of identification, each NUMA node is associated
with a unique token known as a `numa-node-id`. For the purpose of
device tree binding, a `numa-node-id` is a 32-bit integer.

The CPU node is associated with a NUMA node by the presence of a
`numa-node-id` property which contains the node id of the device.

Signed-off-by: Henry Wang <Henry.Wang@arm.com>
This commit is contained in:
Henry Wang 2021-08-07 03:02:15 -04:00 committed by Sebastien Boeuf
parent 5a0a4bc505
commit f3197c3833
1 changed files with 13 additions and 1 deletions
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14
arch/src/aarch64/fdt.rs
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@ -105,7 +105,7 @@ pub fn create_fdt<T: DeviceInfoForFdt + Clone + Debug, S: ::std::hash::BuildHash
// This is not mandatory but we use it to point the root node to the node
// containing description of the interrupt controller for this VM.
fdt.property_u32("interrupt-parent", GIC_PHANDLE)?;
create_cpu_nodes(&mut fdt, &vcpu_mpidr, vcpu_topology)?;
create_cpu_nodes(&mut fdt, &vcpu_mpidr, vcpu_topology, numa_nodes)?;
create_memory_node(&mut fdt, guest_mem)?;
create_chosen_node(&mut fdt, cmdline.to_str().unwrap(), initrd)?;
create_gic_node(&mut fdt, gic_device)?;
@ -140,6 +140,7 @@ fn create_cpu_nodes(
fdt: &mut FdtWriter,
vcpu_mpidr: &[u64],
vcpu_topology: Option<(u8, u8, u8)>,
numa_nodes: &NumaNodes,
) -> FdtWriterResult<()> {
// See https://github.com/torvalds/linux/blob/master/Documentation/devicetree/bindings/arm/cpus.yaml.
let cpus_node = fdt.begin_node("cpus")?;
@ -164,6 +165,17 @@ fn create_cpu_nodes(
// See http://infocenter.arm.com/help/index.jsp?topic=/com.arm.doc.ddi0488c/BABHBJCI.html.
fdt.property_u32("reg", (mpidr & 0x7FFFFF) as u32)?;
fdt.property_u32("phandle", cpu_id as u32 + FIRST_VCPU_PHANDLE)?;
// Add `numa-node-id` property if there is any numa config.
if numa_nodes.len() > 1 {
for numa_node_idx in 0..numa_nodes.len() {
let numa_node = numa_nodes.get(&(numa_node_idx as u32));
if numa_node.unwrap().cpus.contains(&(cpu_id as u8)) {
fdt.property_u32("numa-node-id", numa_node_idx as u32)?;
}
}
}
fdt.end_node(cpu_node)?;
}