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riscv: dts: starfive: Add JH7100 CPU topology

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Add cpu-map binding to inform the kernel about the hardware topology
of the CPU cores.

Before this change, lstopo would report 1 core with 2 threads:
Machine (7231MB total)
  Package L#0
    NUMANode L#0 (P#0 7231MB)
    L2 L#0 (2048KB) + Core L#0
      L1d L#0 (32KB) + L1i L#0 (32KB) + PU L#0 (P#0)
      L1d L#1 (32KB) + L1i L#1 (32KB) + PU L#1 (P#1)

After this change, it correctly identifies two cores:
Machine (7231MB total)
  Package L#0
    NUMANode L#0 (P#0 7231MB)
    L2 L#0 (2048KB)
      L1d L#0 (32KB) + L1i L#0 (32KB) + Core L#0 + PU L#0 (P#0)
      L1d L#1 (32KB) + L1i L#1 (32KB) + Core L#1 + PU L#1 (P#1)

Signed-off-by: Jonas Hahnfeld <hahnjo@hahnjo.de>
Co-developed-by: Emil Renner Berthing <kernel@esmil.dk>
Signed-off-by: Emil Renner Berthing <kernel@esmil.dk>
Signed-off-by: Conor Dooley <conor.dooley@microchip.com>
Link: https://lore.kernel.org/r/20220705190435.1790466-2-mail@conchuod.ie
Signed-off-by: Palmer Dabbelt <palmer@rivosinc.com>
This commit is contained in:
Jonas Hahnfeld
2022-07-05 20:04:32 +01:00
committed by Palmer Dabbelt
parent f2906aa863
commit ef09fa67dc
1 changed files with 14 additions and 2 deletions
Download Patch File Download Diff File Expand all files Collapse all files

16
arch/riscv/boot/dts/starfive/jh7100.dtsi
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@@ -17,7 +17,7 @@ cpus {
#address-cells = <1>;
#size-cells = <0>;
cpu@0 {
U74_0: cpu@0 {
compatible = "sifive,u74-mc", "riscv";
reg = <0>;
d-cache-block-size = <64>;
@@ -42,7 +42,7 @@ cpu0_intc: interrupt-controller {
};
};
cpu@1 {
U74_1: cpu@1 {
compatible = "sifive,u74-mc", "riscv";
reg = <1>;
d-cache-block-size = <64>;
@@ -66,6 +66,18 @@ cpu1_intc: interrupt-controller {
#interrupt-cells = <1>;
};
};
cpu-map {
cluster0 {
core0 {
cpu = <&U74_0>;
};
core1 {
cpu = <&U74_1>;
};
};
};
};
osc_sys: osc_sys {