[PATCH 13/21] xen/arm: Introduce dom0_nodes boot command option

[Hirokazu Takahashi <taka@xxxxxxxxxxxxx>]

Allow ARM Xen to accept the 'dom0_nodes' command line option.
The syntax and format of the parameters are identical to the x86
implementation. The logic that actually functions based on this
argument will be provided in a follow-up patch.
---
 xen/arch/arm/domain_build.c | 43 +++++++++++++++++++++++++++++++++++++
 1 file changed, 43 insertions(+)

diff --git a/xen/arch/arm/domain_build.c b/xen/arch/arm/domain_build.c
index 1efddc60ef..f4187512b0 100644
--- a/xen/arch/arm/domain_build.c
+++ b/xen/arch/arm/domain_build.c
@@ -37,6 +37,7 @@
 #include <asm/cpufeature.h>
 #include <asm/domain_build.h>
 #include <xen/event.h>
+#include <xen/ctype.h>
 
 #include <xen/irq.h>
 #include <xen/grant_table.h>
@@ -66,6 +67,48 @@ static int __init parse_dom0_mem(const char *s)
 }
 custom_param("dom0_mem", parse_dom0_mem);
 
+static nodemask_t __initdata dom0_nodes;
+bool __initdata dom0_affinity_relaxed;
+
+#ifdef CONFIG_NUMA
+
+static int __init cf_check parse_dom0_nodes(const char *s)
+{
+    const char *ss;
+    int rc = 0;
+    unsigned int nid;
+
+    do {
+        ss = strchr(s, ',');
+        if ( !ss )
+            ss = strchr(s, '\0');
+
+        if ( isdigit(*s) )
+        {
+            const char *endp;
+
+            if ( (nid = simple_strtoul(s, &endp, 0), endp != ss) )
+                rc = -EINVAL;
+            else if ( nid >= MAX_NUMNODES )
+                rc = -E2BIG;
+            else
+                node_set(nid, dom0_nodes);
+        }
+        else if ( !cmdline_strcmp(s, "relaxed") )
+            dom0_affinity_relaxed = true;
+        else if ( !cmdline_strcmp(s, "strict") )
+            dom0_affinity_relaxed = false;
+        else
+            rc = -EINVAL;
+
+        s = ss + 1;
+    } while ( *ss );
+
+    return rc;
+}
+custom_param("dom0_nodes", parse_dom0_nodes);
+#endif /* CONFIG_NUMA */
+
 int __init parse_arch_dom0_param(const char *s, const char *e)
 {
     long long val;
-- 
2.43.0