Only the Virt and Spike machines use NUMA. Add a RISCV_NUMA Kconfig
symbol and only have these machines select it. Adapt the Meson file
to only built it if required.

Acked-by: Paolo Bonzini <pbonzini@redhat.com>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
Signed-off-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Message-Id: <20210515173716.358295-8-philmd@redhat.com>
Reviewed-by: Alistair Francis <alistair.francis@wdc.com>
---
 hw/riscv/Kconfig     | 5 +++++
 hw/riscv/meson.build | 2 +-
 2 files changed, 6 insertions(+), 1 deletion(-)

diff --git a/hw/riscv/Kconfig b/hw/riscv/Kconfig
index 86957ec7b06..0590f443fdf 100644
--- a/hw/riscv/Kconfig
+++ b/hw/riscv/Kconfig
@@ -1,3 +1,6 @@
+config RISCV_NUMA
+    bool
+
 config IBEX
     bool
 
@@ -34,6 +37,7 @@ config RISCV_VIRT
     imply PCI_DEVICES
     imply VIRTIO_VGA
     imply TEST_DEVICES
+    select RISCV_NUMA
     select GOLDFISH_RTC
     select MSI_NONBROKEN
     select PCI
@@ -74,6 +78,7 @@ config SIFIVE_U
 
 config SPIKE
     bool
+    select RISCV_NUMA
     select HTIF
     select MSI_NONBROKEN
     select SIFIVE_CLINT
diff --git a/hw/riscv/meson.build b/hw/riscv/meson.build
index a97454661c0..ab6cae57eae 100644
--- a/hw/riscv/meson.build
+++ b/hw/riscv/meson.build
@@ -1,6 +1,6 @@
 riscv_ss = ss.source_set()
 riscv_ss.add(files('boot.c'), fdt)
-riscv_ss.add(files('numa.c'))
+riscv_ss.add(when: 'CONFIG_RISCV_NUMA', if_true: files('numa.c'))
 riscv_ss.add(files('riscv_hart.c'))
 riscv_ss.add(when: 'CONFIG_OPENTITAN', if_true: files('opentitan.c'))
 riscv_ss.add(when: 'CONFIG_RISCV_VIRT', if_true: files('virt.c'))
-- 
2.31.1