[PATCH 14/37] xen/x86: use name fw_numa to replace acpi_numa

[Wei Chen <wei.chen@arm.com>]

Xen is using acpi_numa as a switch for ACPI based NUMA. We want to
use this switch logic for other firmware based NUMA implementation,
like device tree based NUMA in follow-up patches. As Xen will never
use both ACPI and device tree based NUMA at runtime. So I rename
acpi_numa to a more generic name fw_name. This will also allow to
have the code mostly common.

Signed-off-by: Wei Chen <wei.chen@arm.com>
---
 xen/arch/x86/numa.c        |  6 +++---
 xen/arch/x86/setup.c       |  2 +-
 xen/arch/x86/srat.c        | 10 +++++-----
 xen/include/asm-x86/acpi.h |  2 +-
 4 files changed, 10 insertions(+), 10 deletions(-)

diff --git a/xen/arch/x86/numa.c b/xen/arch/x86/numa.c
index 6bc4ade411..2ef385ae3f 100644
--- a/xen/arch/x86/numa.c
+++ b/xen/arch/x86/numa.c
@@ -51,11 +51,11 @@ cpumask_t node_to_cpumask[MAX_NUMNODES] __read_mostly;
 nodemask_t __read_mostly node_online_map = { { [0] = 1UL } };
 
 bool numa_off;
-s8 acpi_numa = 0;
+s8 fw_numa = 0;
 
 int srat_disabled(void)
 {
-    return numa_off || acpi_numa < 0;
+    return numa_off || fw_numa < 0;
 }
 
 /*
@@ -315,7 +315,7 @@ static __init int numa_setup(const char *opt)
     else if ( !strncmp(opt,"noacpi",6) )
     {
         numa_off = false;
-        acpi_numa = -1;
+        fw_numa = -1;
     }
 #endif
     else
diff --git a/xen/arch/x86/setup.c b/xen/arch/x86/setup.c
index b101565f14..1a2093b554 100644
--- a/xen/arch/x86/setup.c
+++ b/xen/arch/x86/setup.c
@@ -313,7 +313,7 @@ void srat_detect_node(int cpu)
     node_set_online(node);
     numa_set_node(cpu, node);
 
-    if ( opt_cpu_info && acpi_numa > 0 )
+    if ( opt_cpu_info && fw_numa > 0 )
         printk("CPU %d APIC %d -> Node %d\n", cpu, apicid, node);
 }
 
diff --git a/xen/arch/x86/srat.c b/xen/arch/x86/srat.c
index 9276a52138..4921830f94 100644
--- a/xen/arch/x86/srat.c
+++ b/xen/arch/x86/srat.c
@@ -167,7 +167,7 @@ static __init void bad_srat(void)
 {
 	int i;
 	printk(KERN_ERR "SRAT: SRAT not used.\n");
-	acpi_numa = -1;
+	fw_numa = -1;
 	for (i = 0; i < MAX_LOCAL_APIC; i++)
 		apicid_to_node[i] = NUMA_NO_NODE;
 	for (i = 0; i < ARRAY_SIZE(pxm2node); i++)
@@ -242,7 +242,7 @@ acpi_numa_x2apic_affinity_init(const struct acpi_srat_x2apic_cpu_affinity *pa)
 
 	apicid_to_node[pa->apic_id] = node;
 	numa_set_processor_nodes_parsed(node);
-	acpi_numa = 1;
+	fw_numa = 1;
 
 	if (opt_acpi_verbose)
 		printk(KERN_INFO "SRAT: PXM %u -> APIC %08x -> Node %u\n",
@@ -277,7 +277,7 @@ acpi_numa_processor_affinity_init(const struct acpi_srat_cpu_affinity *pa)
 	}
 	apicid_to_node[pa->apic_id] = node;
 	numa_set_processor_nodes_parsed(node);
-	acpi_numa = 1;
+	fw_numa = 1;
 
 	if (opt_acpi_verbose)
 		printk(KERN_INFO "SRAT: PXM %u -> APIC %02x -> Node %u\n",
@@ -492,7 +492,7 @@ void __init srat_parse_regions(paddr_t addr)
 	u64 mask;
 	unsigned int i;
 
-	if (acpi_disabled || acpi_numa < 0 ||
+	if (acpi_disabled || fw_numa < 0 ||
 	    acpi_table_parse(ACPI_SIG_SRAT, acpi_parse_srat))
 		return;
 
@@ -521,7 +521,7 @@ int __init acpi_scan_nodes(paddr_t start, paddr_t end)
 	for (i = 0; i < MAX_NUMNODES; i++)
 		cutoff_node(i, start, end);
 
-	if (acpi_numa <= 0)
+	if (fw_numa <= 0)
 		return -1;
 
 	if (!nodes_cover_memory()) {
diff --git a/xen/include/asm-x86/acpi.h b/xen/include/asm-x86/acpi.h
index 7032f3a001..83be71fec3 100644
--- a/xen/include/asm-x86/acpi.h
+++ b/xen/include/asm-x86/acpi.h
@@ -101,7 +101,7 @@ extern unsigned long acpi_wakeup_address;
 
 #define ARCH_HAS_POWER_INIT	1
 
-extern s8 acpi_numa;
+extern s8 fw_numa;
 extern int acpi_scan_nodes(u64 start, u64 end);
 #define NR_NODE_MEMBLKS (MAX_NUMNODES*2)
 
-- 
2.25.1