diff mbox series

[v4,5/8] xen/arm: use !CONFIG_NUMA to keep fake NUMA API

Message ID 20220523062525.2504290-6-wei.chen@arm.com (mailing list archive)
State Superseded
Headers show
Series Device tree based NUMA support for Arm - Part#1 | expand

Commit Message

Wei Chen May 23, 2022, 6:25 a.m. UTC
We have introduced CONFIG_NUMA in a previous patch. And this
option is enabled only on x86 at the current stage. In a follow
up patch, we will enable this option for Arm. But we still
want users to be able to disable the CONFIG_NUMA via Kconfig. In
this case, keep the fake NUMA API, will make Arm code still
able to work with NUMA aware memory allocation and scheduler.

Change-Id: I595b4c84f61f0b827ad9dfbeef03aae30f4752f0
Issue-Id: SCM-2240
Signed-off-by: Wei Chen <wei.chen@arm.com>
Tested-by: Jiamei Xie <jiamei.xie@arm.com>
Reviewed-by: Stefano Stabellini <sstabellini@kernel.org>
v3 -> v4:
no change
v2 -> v3:
Add Tb.
v1 -> v2:
No change.
 xen/arch/arm/include/asm/numa.h | 5 +++++
 1 file changed, 5 insertions(+)
diff mbox series


diff --git a/xen/arch/arm/include/asm/numa.h b/xen/arch/arm/include/asm/numa.h
index e4c4d89192..268a9db055 100644
--- a/xen/arch/arm/include/asm/numa.h
+++ b/xen/arch/arm/include/asm/numa.h
@@ -5,6 +5,8 @@ 
 typedef u8 nodeid_t;
+#ifndef CONFIG_NUMA
 /* Fake one node for now. See also node_online_map. */
 #define cpu_to_node(cpu) 0
 #define node_to_cpumask(node)   (cpu_online_map)
@@ -24,6 +26,9 @@  extern mfn_t first_valid_mfn;
 #define node_spanned_pages(nid) (max_page - mfn_x(first_valid_mfn))
 #define node_start_pfn(nid) (mfn_x(first_valid_mfn))
 #define __node_distance(a, b) (20)
 #define arch_want_default_dmazone() (false)
 #endif /* __ARCH_ARM_NUMA_H */