1 files changed, 26 insertions, 1 deletions

diff --git a/arch/x86/kernel/apic/x2apic_uv_x.c b/arch/x86/kernel/apic/x2apic_uv_x.c
index 326c25477d3..b684bb303cb 100644
--- a/arch/x86/kernel/apic/x2apic_uv_x.c
+++ b/arch/x86/kernel/apic/x2apic_uv_x.c
@@ -30,10 +30,22 @@
 #include <asm/apic.h>
 #include <asm/ipi.h>
 #include <asm/smp.h>
+#include <asm/x86_init.h>
 
 DEFINE_PER_CPU(int, x2apic_extra_bits);
 
 static enum uv_system_type uv_system_type;
+static u64 gru_start_paddr, gru_end_paddr;
+
+static inline bool is_GRU_range(u64 start, u64 end)
+{
+        return start >= gru_start_paddr && end <= gru_end_paddr;
+}
+
+static bool uv_is_untracked_pat_range(u64 start, u64 end)
+{
+        return is_ISA_range(start, end) || is_GRU_range(start, end);
+}
 
 static int early_get_nodeid(void)
 {
@@ -49,6 +61,7 @@ static int early_get_nodeid(void)
 static int __init uv_acpi_madt_oem_check(char *oem_id, char *oem_table_id)
 {
         if (!strcmp(oem_id, "SGI")) {
+                x86_platform.is_untracked_pat_range =  uv_is_untracked_pat_range;
                 if (!strcmp(oem_table_id, "UVL"))
                         uv_system_type = UV_LEGACY_APIC;
                 else if (!strcmp(oem_table_id, "UVX"))
@@ -385,8 +398,12 @@ static __init void map_gru_high(int max_pnode)
         int shift = UVH_RH_GAM_GRU_OVERLAY_CONFIG_MMR_BASE_SHFT;
 
         gru.v = uv_read_local_mmr(UVH_RH_GAM_GRU_OVERLAY_CONFIG_MMR);
-        if (gru.s.enable)
+        if (gru.s.enable) {
                 map_high("GRU", gru.s.base, shift, max_pnode, map_wb);
+                gru_start_paddr = ((u64)gru.s.base << shift);
+                gru_end_paddr = gru_start_paddr + (1UL << shift) * (max_pnode + 1);
+
+        }
 }
 
 static __init void map_mmr_high(int max_pnode)
@@ -409,6 +426,12 @@ static __init void map_mmioh_high(int max_pnode)
                 map_high("MMIOH", mmioh.s.base, shift, max_pnode, map_uc);
 }
 
+static __init void map_low_mmrs(void)
+{
+        init_extra_mapping_uc(UV_GLOBAL_MMR32_BASE, UV_GLOBAL_MMR32_SIZE);
+        init_extra_mapping_uc(UV_LOCAL_MMR_BASE, UV_LOCAL_MMR_SIZE);
+}
+
 static __init void uv_rtc_init(void)
 {
         long status;
@@ -550,6 +573,8 @@ void __init uv_system_init(void)
         unsigned long mmr_base, present, paddr;
         unsigned short pnode_mask;
 
+        map_low_mmrs();
+
         m_n_config.v = uv_read_local_mmr(UVH_SI_ADDR_MAP_CONFIG);
         m_val = m_n_config.s.m_skt;
         n_val = m_n_config.s.n_skt;