Moving this out of function local scope as we want to
allow EDAC to be able to view this topology attribute.
A follow-up patch introduces an accessor function for this variable
that will be used by EDAC's mce_amd_inj module.
Cc: Thomas Gleixner <t...@linutronix.de>
Cc: Ingo Molnar <mi...@redhat.com>
Cc: "H. Peter Anvin" <h...@zytor.com>
Cc: Borislav Petkov <b...@suse.de>
Cc: Jacob Shin <jacob.w.s...@gmail.com>
Cc: Dave Hansen <dave.han...@linux.intel.com>
Cc: Andy Lutomirski <l...@kernel.org>
Cc: Paolo Bonzini <pbonz...@redhat.com>
Signed-off-by: Aravind Gopalakrishnan <aravind.gopalakrish...@amd.com>
---
arch/x86/kernel/cpu/amd.c | 17 ++++++++++++-----
1 file changed, 12 insertions(+), 5 deletions(-)
diff --git a/arch/x86/kernel/cpu/amd.c b/arch/x86/kernel/cpu/amd.c
index 5bd3a99..487083b 100644
--- a/arch/x86/kernel/cpu/amd.c
+++ b/arch/x86/kernel/cpu/amd.c
@@ -19,6 +19,13 @@
#include "cpu.h"
+/*
+ * nodes_per_processor: Specifies number of nodes per socket
+ * Refer Fam15h Models 00-0fh BKDG-
+ * CPUID Fn8000_001E_ECX Node Identifiers[10:8]
+ */
+static u32 nodes_per_processor = 1;
+
static inline int rdmsrl_amd_safe(unsigned msr, unsigned long long *p)
{
u32 gprs[8] = { 0 };
@@ -291,7 +298,7 @@ static int nearby_node(int apicid)
#ifdef CONFIG_SMP
static void amd_get_topology(struct cpuinfo_x86 *c)
{
- u32 nodes, cores_per_cu = 1;
+ u32 cores_per_cu = 1;
u8 node_id;
int cpu = smp_processor_id();
@@ -300,7 +307,7 @@ static void amd_get_topology(struct cpuinfo_x86 *c)
u32 eax, ebx, ecx, edx;
cpuid(0x8000001e, &eax, &ebx, &ecx, &edx);
- nodes = ((ecx >> 8) & 7) + 1;
+ nodes_per_processor = ((ecx >> 8) & 7) + 1;
node_id = ecx & 7;
/* get compute unit information */
@@ -311,18 +318,18 @@ static void amd_get_topology(struct cpuinfo_x86 *c)
u64 value;
rdmsrl(MSR_FAM10H_NODE_ID, value);
- nodes = ((value >> 3) & 7) + 1;
+ nodes_per_processor = ((value >> 3) & 7) + 1;
node_id = value & 7;
} else
return;
/* fixup multi-node processor information */
- if (nodes > 1) {
+ if (nodes_per_processor > 1) {
u32 cores_per_node;
u32 cus_per_node;
set_cpu_cap(c, X86_FEATURE_AMD_DCM);
- cores_per_node = c->x86_max_cores / nodes;
+ cores_per_node = c->x86_max_cores / nodes_per_processor;
cus_per_node = cores_per_node / cores_per_cu;
/* store NodeID, use llc_shared_map to store sibling info */
--
2.4.0
--
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