2 files changed, 25 insertions, 7 deletions

diff --git a/arch/x86/include/asm/uv/uv_hub.h b/arch/x86/include/asm/uv/uv_hub.h
index 811bfabc80b7..bcdb708993d2 100644
--- a/arch/x86/include/asm/uv/uv_hub.h
+++ b/arch/x86/include/asm/uv/uv_hub.h
@@ -338,6 +338,18 @@ static inline unsigned long uv_global_gru_mmr_address(int pnode, unsigned long o
         return UV_GLOBAL_GRU_MMR_BASE | offset | (pnode << uv_hub_info->m_val);
 }
 
+static inline void uv_write_global_mmr8(int pnode, unsigned long offset,
+                                unsigned char val)
+{
+        writeb(val, uv_global_mmr64_address(pnode, offset));
+}
+
+static inline unsigned char uv_read_global_mmr8(int pnode,
+                                                 unsigned long offset)
+{
+        return readb(uv_global_mmr64_address(pnode, offset));
+}
+
 /*
  * Access hub local MMRs. Faster than using global space but only local MMRs
  * are accessible.
@@ -457,11 +469,17 @@ static inline void uv_set_scir_bits(unsigned char value)
         }
 }
 
+static inline unsigned long uv_scir_offset(int apicid)
+{
+        return SCIR_LOCAL_MMR_BASE | (apicid & 0x3f);
+}
+
 static inline void uv_set_cpu_scir_bits(int cpu, unsigned char value)
 {
         if (uv_cpu_hub_info(cpu)->scir.state != value) {
+                uv_write_global_mmr8(uv_cpu_to_pnode(cpu),
+                                uv_cpu_hub_info(cpu)->scir.offset, value);
                 uv_cpu_hub_info(cpu)->scir.state = value;
-                uv_write_local_mmr8(uv_cpu_hub_info(cpu)->scir.offset, value);
         }
 }
 
diff --git a/arch/x86/kernel/apic/x2apic_uv_x.c b/arch/x86/kernel/apic/x2apic_uv_x.c
index d56b0efb2057..5f92494dab61 100644
--- a/arch/x86/kernel/apic/x2apic_uv_x.c
+++ b/arch/x86/kernel/apic/x2apic_uv_x.c
@@ -629,8 +629,10 @@ void __init uv_system_init(void)
         uv_rtc_init();
 
         for_each_present_cpu(cpu) {
+                int apicid = per_cpu(x86_cpu_to_apicid, cpu);
+
                 nid = cpu_to_node(cpu);
-                pnode = uv_apicid_to_pnode(per_cpu(x86_cpu_to_apicid, cpu));
+                pnode = uv_apicid_to_pnode(apicid);
                 blade = boot_pnode_to_blade(pnode);
                 lcpu = uv_blade_info[blade].nr_possible_cpus;
                 uv_blade_info[blade].nr_possible_cpus++;
@@ -651,15 +653,13 @@ void __init uv_system_init(void)
                 uv_cpu_hub_info(cpu)->gnode_extra = gnode_extra;
                 uv_cpu_hub_info(cpu)->global_mmr_base = mmr_base;
                 uv_cpu_hub_info(cpu)->coherency_domain_number = sn_coherency_id;
-                uv_cpu_hub_info(cpu)->scir.offset = SCIR_LOCAL_MMR_BASE + lcpu;
+                uv_cpu_hub_info(cpu)->scir.offset = uv_scir_offset(apicid);
                 uv_node_to_blade[nid] = blade;
                 uv_cpu_to_blade[cpu] = blade;
                 max_pnode = max(pnode, max_pnode);
 
-                printk(KERN_DEBUG "UV: cpu %d, apicid 0x%x, pnode %d, nid %d, "
-                        "lcpu %d, blade %d\n",
-                        cpu, per_cpu(x86_cpu_to_apicid, cpu), pnode, nid,
-                        lcpu, blade);
+                printk(KERN_DEBUG "UV: cpu %d, apicid 0x%x, pnode %d, nid %d, lcpu %d, blade %d\n",
+                        cpu, apicid, pnode, nid, lcpu, blade);
         }
 
         /* Add blade/pnode info for nodes without cpus */