Merge branch 'release' of git://git.kernel.org/pub/scm/linux/kernel/git/aegl/linux-2.6

* 'release' of git://git.kernel.org/pub/scm/linux/kernel/git/aegl/linux-2.6:
  [IA64] fix personality(PER_LINUX32) performance issue
  [IA64] Properly unregister legacy interrupts
  [IA64] Remove NULL pointer check for argument never passed as NULL.
  [IA64] trivial cleanup for perfmon.c
  [IA64] trivial cleanup for entry.S
  [IA64] fix interrupt masking for pending works on kernel leave
  [IA64] allow user to force_pal_cache_flush
  [IA64] Don't reserve crashkernel memory > 4 GB
  [IA64] machvec support for SGI UV platform
  [IA64] Add header files for SGI UV platform

15 files changed, 269 insertions, 38 deletions

diff --git a/arch/ia64/Kconfig b/arch/ia64/Kconfig
index 0df5f6f75edf..16be41446b5b 100644
--- a/arch/ia64/Kconfig
+++ b/arch/ia64/Kconfig
@@ -135,6 +135,7 @@ config IA64_GENERIC
           HP-zx1/sx1000         For HP systems
           HP-zx1/sx1000+swiotlb For HP systems with (broken) DMA-constrained devices.
           SGI-SN2               For SGI Altix systems
+          SGI-UV                For SGI UV systems
           Ski-simulator         For the HP simulator <http://www.hpl.hp.com/research/linux/ski/>
 
           If you don't know what to do, choose "generic".
@@ -170,6 +171,18 @@ config IA64_SGI_SN2
           to select this option.  If in doubt, select ia64 generic support
           instead.
 
+config IA64_SGI_UV`
+        bool "SGI-UV`"
+        select NUMA
+        select ACPI_NUMA
+        select SWIOTLB
+        help
+          Selecting this option will optimize the kernel for use on UV based
+          systems, but the resulting kernel binary will not run on other
+          types of ia64 systems.  If you have an SGI UV system, it's safe
+          to select this option.  If in doubt, select ia64 generic support
+          instead.
+
 config IA64_HP_SIM
         bool "Ski-simulator"
         select SWIOTLB
diff --git a/arch/ia64/Makefile b/arch/ia64/Makefile
index ec4cca477f49..88f1a55c6c94 100644
--- a/arch/ia64/Makefile
+++ b/arch/ia64/Makefile
@@ -63,7 +63,7 @@ drivers-$(CONFIG_PCI)		+= arch/ia64/pci/
 drivers-$(CONFIG_IA64_HP_SIM)   += arch/ia64/hp/sim/
 drivers-$(CONFIG_IA64_HP_ZX1)   += arch/ia64/hp/common/ arch/ia64/hp/zx1/
 drivers-$(CONFIG_IA64_HP_ZX1_SWIOTLB) += arch/ia64/hp/common/ arch/ia64/hp/zx1/
-drivers-$(CONFIG_IA64_GENERIC)  += arch/ia64/hp/common/ arch/ia64/hp/zx1/ arch/ia64/hp/sim/ arch/ia64/sn/
+drivers-$(CONFIG_IA64_GENERIC)  += arch/ia64/hp/common/ arch/ia64/hp/zx1/ arch/ia64/hp/sim/ arch/ia64/sn/ arch/ia64/uv/
 drivers-$(CONFIG_OPROFILE)      += arch/ia64/oprofile/
 
 boot := arch/ia64/hp/sim/boot
diff --git a/arch/ia64/ia32/ia32_support.c b/arch/ia64/ia32/ia32_support.c
index 896b1ebbfb26..a6965ddafc46 100644
--- a/arch/ia64/ia32/ia32_support.c
+++ b/arch/ia64/ia32/ia32_support.c
@@ -15,7 +15,6 @@
 #include <linux/kernel.h>
 #include <linux/init.h>
 #include <linux/mm.h>
-#include <linux/personality.h>
 #include <linux/sched.h>
 
 #include <asm/intrinsics.h>
@@ -29,7 +28,6 @@
 
 extern int die_if_kernel (char *str, struct pt_regs *regs, long err);
 
-struct exec_domain ia32_exec_domain;
 struct page *ia32_shared_page[NR_CPUS];
 unsigned long *ia32_boot_gdt;
 unsigned long *cpu_gdt_table[NR_CPUS];
@@ -240,14 +238,6 @@ ia32_cpu_init (void)
 static int __init
 ia32_init (void)
 {
-        ia32_exec_domain.name = "Linux/x86";
-        ia32_exec_domain.handler = NULL;
-        ia32_exec_domain.pers_low = PER_LINUX32;
-        ia32_exec_domain.pers_high = PER_LINUX32;
-        ia32_exec_domain.signal_map = default_exec_domain.signal_map;
-        ia32_exec_domain.signal_invmap = default_exec_domain.signal_invmap;
-        register_exec_domain(&ia32_exec_domain);
-
 #if PAGE_SHIFT > IA32_PAGE_SHIFT
         {
                 extern struct kmem_cache *ia64_partial_page_cachep;
diff --git a/arch/ia64/kernel/acpi.c b/arch/ia64/kernel/acpi.c
index 19709a079635..853d1f11be00 100644
--- a/arch/ia64/kernel/acpi.c
+++ b/arch/ia64/kernel/acpi.c
@@ -117,7 +117,10 @@ acpi_get_sysname(void)
         if (!strcmp(hdr->oem_id, "HP")) {
                 return "hpzx1";
         } else if (!strcmp(hdr->oem_id, "SGI")) {
-                return "sn2";
+                if (!strcmp(hdr->oem_table_id + 4, "UV"))
+                        return "uv";
+                else
+                        return "sn2";
         }
 
         return "dig";
@@ -130,6 +133,8 @@ acpi_get_sysname(void)
         return "hpzx1_swiotlb";
 # elif defined (CONFIG_IA64_SGI_SN2)
         return "sn2";
+# elif defined (CONFIG_IA64_SGI_UV)
+        return "uv";
 # elif defined (CONFIG_IA64_DIG)
         return "dig";
 # else
@@ -622,6 +627,9 @@ void acpi_unregister_gsi(u32 gsi)
         if (acpi_irq_model == ACPI_IRQ_MODEL_PLATFORM)
                 return;
 
+        if (has_8259 && gsi < 16)
+                return;
+
         iosapic_unregister_intr(gsi);
 }
 
diff --git a/arch/ia64/kernel/entry.S b/arch/ia64/kernel/entry.S
index e49ad8c5dc69..ca2bb95726de 100644
--- a/arch/ia64/kernel/entry.S
+++ b/arch/ia64/kernel/entry.S
@@ -1156,6 +1156,9 @@ skip_rbs_switch:
          *      r31 = current->thread_info->flags
          * On exit:
          *      p6 = TRUE if work-pending-check needs to be redone
+         *
+         * Interrupts are disabled on entry, reenabled depend on work, and
+         * disabled on exit.
          */
 .work_pending_syscall:
         add r2=-8,r2
@@ -1164,16 +1167,16 @@ skip_rbs_switch:
         st8 [r2]=r8
         st8 [r3]=r10
 .work_pending:
-        tbit.z p6,p0=r31,TIF_NEED_RESCHED               // current_thread_info()->need_resched==0?
+        tbit.z p6,p0=r31,TIF_NEED_RESCHED       // is resched not needed?
 (p6)    br.cond.sptk.few .notify
 #ifdef CONFIG_PREEMPT
 (pKStk) dep r21=-1,r0,PREEMPT_ACTIVE_BIT,1
         ;;
 (pKStk) st4 [r20]=r21
-        ssm psr.i               // enable interrupts
 #endif
+        ssm psr.i               // enable interrupts
         br.call.spnt.many rp=schedule
-.ret9:  cmp.eq p6,p0=r0,r0                              // p6 <- 1
+.ret9:  cmp.eq p6,p0=r0,r0      // p6 <- 1 (re-check)
         rsm psr.i               // disable interrupts
         ;;
 #ifdef CONFIG_PREEMPT
@@ -1182,13 +1185,13 @@ skip_rbs_switch:
 (pKStk) st4 [r20]=r0            // preempt_count() <- 0
 #endif
 (pLvSys)br.cond.sptk.few  .work_pending_syscall_end
-        br.cond.sptk.many .work_processed_kernel        // re-check
+        br.cond.sptk.many .work_processed_kernel
 
 .notify:
 (pUStk) br.call.spnt.many rp=notify_resume_user
-.ret10: cmp.ne p6,p0=r0,r0                              // p6 <- 0
+.ret10: cmp.ne p6,p0=r0,r0      // p6 <- 0 (don't re-check)
 (pLvSys)br.cond.sptk.few  .work_pending_syscall_end
-        br.cond.sptk.many .work_processed_kernel        // don't re-check
+        br.cond.sptk.many .work_processed_kernel
 
 .work_pending_syscall_end:
         adds r2=PT(R8)+16,r12
@@ -1196,7 +1199,7 @@ skip_rbs_switch:
         ;;
         ld8 r8=[r2]
         ld8 r10=[r3]
-        br.cond.sptk.many .work_processed_syscall       // re-check
+        br.cond.sptk.many .work_processed_syscall
 
 END(ia64_leave_kernel)
 
@@ -1234,9 +1237,12 @@ GLOBAL_ENTRY(ia64_invoke_schedule_tail)
 END(ia64_invoke_schedule_tail)
 
         /*
-         * Setup stack and call do_notify_resume_user().  Note that pSys and pNonSys need to
-         * be set up by the caller.  We declare 8 input registers so the system call
-         * args get preserved, in case we need to restart a system call.
+         * Setup stack and call do_notify_resume_user(), keeping interrupts
+         * disabled.
+         *
+         * Note that pSys and pNonSys need to be set up by the caller.
+         * We declare 8 input registers so the system call args get preserved,
+         * in case we need to restart a system call.
          */
 ENTRY(notify_resume_user)
         .prologue ASM_UNW_PRLG_RP|ASM_UNW_PRLG_PFS, ASM_UNW_PRLG_GRSAVE(8)
diff --git a/arch/ia64/kernel/palinfo.c b/arch/ia64/kernel/palinfo.c
index 4547a2092af9..9dc00f7fe10e 100644
--- a/arch/ia64/kernel/palinfo.c
+++ b/arch/ia64/kernel/palinfo.c
@@ -900,12 +900,6 @@ static void
 palinfo_smp_call(void *info)
 {
         palinfo_smp_data_t *data = (palinfo_smp_data_t *)info;
-        if (data == NULL) {
-                printk(KERN_ERR "palinfo: data pointer is NULL\n");
-                data->ret = 0; /* no output */
-                return;
-        }
-        /* does this actual call */
         data->ret = (*data->func)(data->page);
 }
 
diff --git a/arch/ia64/kernel/perfmon.c b/arch/ia64/kernel/perfmon.c
index c1ad27de2dd2..71d05133f556 100644
--- a/arch/ia64/kernel/perfmon.c
+++ b/arch/ia64/kernel/perfmon.c
@@ -5013,12 +5013,13 @@ pfm_context_force_terminate(pfm_context_t *ctx, struct pt_regs *regs)
 }
 
 static int pfm_ovfl_notify_user(pfm_context_t *ctx, unsigned long ovfl_pmds);
+
  /*
   * pfm_handle_work() can be called with interrupts enabled
   * (TIF_NEED_RESCHED) or disabled. The down_interruptible
   * call may sleep, therefore we must re-enable interrupts
   * to avoid deadlocks. It is safe to do so because this function
-  * is called ONLY when returning to user level (PUStk=1), in which case
+  * is called ONLY when returning to user level (pUStk=1), in which case
   * there is no risk of kernel stack overflow due to deep
   * interrupt nesting.
   */
@@ -5034,7 +5035,8 @@ pfm_handle_work(void)
 
         ctx = PFM_GET_CTX(current);
         if (ctx == NULL) {
-                printk(KERN_ERR "perfmon: [%d] has no PFM context\n", task_pid_nr(current));
+                printk(KERN_ERR "perfmon: [%d] has no PFM context\n",
+                        task_pid_nr(current));
                 return;
         }
 
@@ -5058,11 +5060,12 @@ pfm_handle_work(void)
         /*
          * must be done before we check for simple-reset mode
          */
-        if (ctx->ctx_fl_going_zombie || ctx->ctx_state == PFM_CTX_ZOMBIE) goto do_zombie;
-
+        if (ctx->ctx_fl_going_zombie || ctx->ctx_state == PFM_CTX_ZOMBIE)
+                goto do_zombie;
 
         //if (CTX_OVFL_NOBLOCK(ctx)) goto skip_blocking;
-        if (reason == PFM_TRAP_REASON_RESET) goto skip_blocking;
+        if (reason == PFM_TRAP_REASON_RESET)
+                goto skip_blocking;
 
         /*
          * restore interrupt mask to what it was on entry.
@@ -5110,7 +5113,8 @@ do_zombie:
         /*
          * in case of interruption of down() we don't restart anything
          */
-        if (ret < 0) goto nothing_to_do;
+        if (ret < 0)
+                goto nothing_to_do;
 
 skip_blocking:
         pfm_resume_after_ovfl(ctx, ovfl_regs, regs);
diff --git a/arch/ia64/kernel/process.c b/arch/ia64/kernel/process.c
index 58dcfac5ea88..a3a34b4eb038 100644
--- a/arch/ia64/kernel/process.c
+++ b/arch/ia64/kernel/process.c
@@ -167,11 +167,18 @@ void tsk_clear_notify_resume(struct task_struct *tsk)
         clear_ti_thread_flag(task_thread_info(tsk), TIF_NOTIFY_RESUME);
 }
 
+/*
+ * do_notify_resume_user():
+ *      Called from notify_resume_user at entry.S, with interrupts disabled.
+ */
 void
-do_notify_resume_user (sigset_t *unused, struct sigscratch *scr, long in_syscall)
+do_notify_resume_user(sigset_t *unused, struct sigscratch *scr, long in_syscall)
 {
         if (fsys_mode(current, &scr->pt)) {
-                /* defer signal-handling etc. until we return to privilege-level 0.  */
+                /*
+                 * defer signal-handling etc. until we return to
+                 * privilege-level 0.
+                 */
                 if (!ia64_psr(&scr->pt)->lp)
                         ia64_psr(&scr->pt)->lp = 1;
                 return;
@@ -179,16 +186,26 @@ do_notify_resume_user (sigset_t *unused, struct sigscratch *scr, long in_syscall
 
 #ifdef CONFIG_PERFMON
         if (current->thread.pfm_needs_checking)
+                /*
+                 * Note: pfm_handle_work() allow us to call it with interrupts
+                 * disabled, and may enable interrupts within the function.
+                 */
                 pfm_handle_work();
 #endif
 
         /* deal with pending signal delivery */
-        if (test_thread_flag(TIF_SIGPENDING))
+        if (test_thread_flag(TIF_SIGPENDING)) {
+                local_irq_enable();     /* force interrupt enable */
                 ia64_do_signal(scr, in_syscall);
+        }
 
         /* copy user rbs to kernel rbs */
-        if (unlikely(test_thread_flag(TIF_RESTORE_RSE)))
+        if (unlikely(test_thread_flag(TIF_RESTORE_RSE))) {
+                local_irq_enable();     /* force interrupt enable */
                 ia64_sync_krbs();
+        }
+
+        local_irq_disable();    /* force interrupt disable */
 }
 
 static int pal_halt        = 1;
diff --git a/arch/ia64/kernel/sal.c b/arch/ia64/kernel/sal.c
index a3022dc48ef8..7e0259709c04 100644
--- a/arch/ia64/kernel/sal.c
+++ b/arch/ia64/kernel/sal.c
@@ -229,6 +229,14 @@ static void __init sal_desc_ap_wakeup(void *p) { }
  */
 static int sal_cache_flush_drops_interrupts;
 
+static int __init
+force_pal_cache_flush(char *str)
+{
+        sal_cache_flush_drops_interrupts = 1;
+        return 0;
+}
+early_param("force_pal_cache_flush", force_pal_cache_flush);
+
 void __init
 check_sal_cache_flush (void)
 {
@@ -237,6 +245,9 @@ check_sal_cache_flush (void)
         u64 vector, cache_type = 3;
         struct ia64_sal_retval isrv;
 
+        if (sal_cache_flush_drops_interrupts)
+                return;
+
         cpu = get_cpu();
         local_irq_save(flags);
 
diff --git a/arch/ia64/kernel/setup.c b/arch/ia64/kernel/setup.c
index 5015ca1275ca..e9596cd0cdab 100644
--- a/arch/ia64/kernel/setup.c
+++ b/arch/ia64/kernel/setup.c
@@ -239,6 +239,25 @@ __initcall(register_memory);
 
 
 #ifdef CONFIG_KEXEC
+
+/*
+ * This function checks if the reserved crashkernel is allowed on the specific
+ * IA64 machine flavour. Machines without an IO TLB use swiotlb and require
+ * some memory below 4 GB (i.e. in 32 bit area), see the implementation of
+ * lib/swiotlb.c. The hpzx1 architecture has an IO TLB but cannot use that
+ * in kdump case. See the comment in sba_init() in sba_iommu.c.
+ *
+ * So, the only machvec that really supports loading the kdump kernel
+ * over 4 GB is "sn2".
+ */
+static int __init check_crashkernel_memory(unsigned long pbase, size_t size)
+{
+        if (ia64_platform_is("sn2") || ia64_platform_is("uv"))
+                return 1;
+        else
+                return pbase < (1UL << 32);
+}
+
 static void __init setup_crashkernel(unsigned long total, int *n)
 {
         unsigned long long base = 0, size = 0;
@@ -252,6 +271,16 @@ static void __init setup_crashkernel(unsigned long total, int *n)
                         base = kdump_find_rsvd_region(size,
                                         rsvd_region, *n);
                 }
+
+                if (!check_crashkernel_memory(base, size)) {
+                        pr_warning("crashkernel: There would be kdump memory "
+                                "at %ld GB but this is unusable because it "
+                                "must\nbe below 4 GB. Change the memory "
+                                "configuration of the machine.\n",
+                                (unsigned long)(base >> 30));
+                        return;
+                }
+
                 if (base != ~0UL) {
                         printk(KERN_INFO "Reserving %ldMB of memory at %ldMB "
                                         "for crashkernel (System RAM: %ldMB)\n",
diff --git a/arch/ia64/mm/init.c b/arch/ia64/mm/init.c
index fc6c6636ffda..200100ea7610 100644
--- a/arch/ia64/mm/init.c
+++ b/arch/ia64/mm/init.c
@@ -719,3 +719,28 @@ out:
 EXPORT_SYMBOL_GPL(remove_memory);
 #endif /* CONFIG_MEMORY_HOTREMOVE */
 #endif
+
+/*
+ * Even when CONFIG_IA32_SUPPORT is not enabled it is
+ * useful to have the Linux/x86 domain registered to
+ * avoid an attempted module load when emulators call
+ * personality(PER_LINUX32). This saves several milliseconds
+ * on each such call.
+ */
+static struct exec_domain ia32_exec_domain;
+
+static int __init
+per_linux32_init(void)
+{
+        ia32_exec_domain.name = "Linux/x86";
+        ia32_exec_domain.handler = NULL;
+        ia32_exec_domain.pers_low = PER_LINUX32;
+        ia32_exec_domain.pers_high = PER_LINUX32;
+        ia32_exec_domain.signal_map = default_exec_domain.signal_map;
+        ia32_exec_domain.signal_invmap = default_exec_domain.signal_invmap;
+        register_exec_domain(&ia32_exec_domain);
+
+        return 0;
+}
+
+__initcall(per_linux32_init);
diff --git a/arch/ia64/uv/Makefile b/arch/ia64/uv/Makefile
new file mode 100644
index 000000000000..aa9f91947c49
--- /dev/null
+++ b/arch/ia64/uv/Makefile
@@ -0,0 +1,12 @@
+# arch/ia64/uv/Makefile
+#
+# This file is subject to the terms and conditions of the GNU General Public
+# License.  See the file "COPYING" in the main directory of this archive
+# for more details.
+#
+# Copyright (C) 2008 Silicon Graphics, Inc.  All Rights Reserved.
+#
+# Makefile for the sn uv subplatform
+#
+
+obj-y += kernel/
diff --git a/arch/ia64/uv/kernel/Makefile b/arch/ia64/uv/kernel/Makefile
new file mode 100644
index 000000000000..8d92b4684d8e
--- /dev/null
+++ b/arch/ia64/uv/kernel/Makefile
@@ -0,0 +1,13 @@
+# arch/ia64/uv/kernel/Makefile
+#
+# This file is subject to the terms and conditions of the GNU General Public
+# License.  See the file "COPYING" in the main directory of this archive
+# for more details.
+#
+# Copyright (C) 2008 Silicon Graphics, Inc.  All Rights Reserved.
+#
+
+EXTRA_CFLAGS += -Iarch/ia64/sn/include
+
+obj-y                           += setup.o
+obj-$(CONFIG_IA64_GENERIC)      += machvec.o
diff --git a/arch/ia64/uv/kernel/machvec.c b/arch/ia64/uv/kernel/machvec.c
new file mode 100644
index 000000000000..50737a9dca74
--- /dev/null
+++ b/arch/ia64/uv/kernel/machvec.c
@@ -0,0 +1,11 @@
+/*
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License.  See the file "COPYING" in the main directory of this archive
+ * for more details.
+ *
+ * Copyright (c) 2008 Silicon Graphics, Inc.  All Rights Reserved.
+ */
+
+#define MACHVEC_PLATFORM_NAME   uv
+#define MACHVEC_PLATFORM_HEADER <asm/machvec_uv.h>
+#include <asm/machvec_init.h>
diff --git a/arch/ia64/uv/kernel/setup.c b/arch/ia64/uv/kernel/setup.c
new file mode 100644
index 000000000000..9aa743203c3c
--- /dev/null
+++ b/arch/ia64/uv/kernel/setup.c
@@ -0,0 +1,98 @@
+/*
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License.  See the file "COPYING" in the main directory of this archive
+ * for more details.
+ *
+ * SGI UV Core Functions
+ *
+ * Copyright (C) 2008 Silicon Graphics, Inc. All rights reserved.
+ */
+
+#include <linux/module.h>
+#include <linux/percpu.h>
+#include <asm/sn/simulator.h>
+#include <asm/uv/uv_mmrs.h>
+#include <asm/uv/uv_hub.h>
+
+DEFINE_PER_CPU(struct uv_hub_info_s, __uv_hub_info);
+EXPORT_PER_CPU_SYMBOL_GPL(__uv_hub_info);
+
+
+struct redir_addr {
+        unsigned long redirect;
+        unsigned long alias;
+};
+
+#define DEST_SHIFT UVH_RH_GAM_ALIAS210_REDIRECT_CONFIG_0_MMR_DEST_BASE_SHFT
+
+static __initdata struct redir_addr redir_addrs[] = {
+        {UVH_RH_GAM_ALIAS210_REDIRECT_CONFIG_0_MMR, UVH_SI_ALIAS0_OVERLAY_CONFIG},
+        {UVH_RH_GAM_ALIAS210_REDIRECT_CONFIG_1_MMR, UVH_SI_ALIAS1_OVERLAY_CONFIG},
+        {UVH_RH_GAM_ALIAS210_REDIRECT_CONFIG_2_MMR, UVH_SI_ALIAS2_OVERLAY_CONFIG},
+};
+
+static __init void get_lowmem_redirect(unsigned long *base, unsigned long *size)
+{
+        union uvh_si_alias0_overlay_config_u alias;
+        union uvh_rh_gam_alias210_redirect_config_2_mmr_u redirect;
+        int i;
+
+        for (i = 0; i < ARRAY_SIZE(redir_addrs); i++) {
+                alias.v = uv_read_local_mmr(redir_addrs[i].alias);
+                if (alias.s.base == 0) {
+                        *size = (1UL << alias.s.m_alias);
+                        redirect.v = uv_read_local_mmr(redir_addrs[i].redirect);
+                        *base = (unsigned long)redirect.s.dest_base << DEST_SHIFT;
+                        return;
+                }
+        }
+        BUG();
+}
+
+void __init uv_setup(char **cmdline_p)
+{
+        union uvh_si_addr_map_config_u m_n_config;
+        union uvh_node_id_u node_id;
+        unsigned long gnode_upper;
+        int nid, cpu, m_val, n_val;
+        unsigned long mmr_base, lowmem_redir_base, lowmem_redir_size;
+
+        if (IS_MEDUSA()) {
+                lowmem_redir_base = 0;
+                lowmem_redir_size = 0;
+                node_id.v = 0;
+                m_n_config.s.m_skt = 37;
+                m_n_config.s.n_skt = 0;
+                mmr_base = 0;
+        } else {
+                get_lowmem_redirect(&lowmem_redir_base, &lowmem_redir_size);
+                node_id.v = uv_read_local_mmr(UVH_NODE_ID);
+                m_n_config.v = uv_read_local_mmr(UVH_SI_ADDR_MAP_CONFIG);
+                mmr_base =
+                        uv_read_local_mmr(UVH_RH_GAM_MMR_OVERLAY_CONFIG_MMR) &
+                                ~UV_MMR_ENABLE;
+        }
+
+        m_val = m_n_config.s.m_skt;
+        n_val = m_n_config.s.n_skt;
+        printk(KERN_DEBUG "UV: global MMR base 0x%lx\n", mmr_base);
+
+        gnode_upper = (((unsigned long)node_id.s.node_id) &
+                       ~((1 << n_val) - 1)) << m_val;
+
+        for_each_present_cpu(cpu) {
+                nid = cpu_to_node(cpu);
+                uv_cpu_hub_info(cpu)->lowmem_remap_base = lowmem_redir_base;
+                uv_cpu_hub_info(cpu)->lowmem_remap_top =
+                        lowmem_redir_base + lowmem_redir_size;
+                uv_cpu_hub_info(cpu)->m_val = m_val;
+                uv_cpu_hub_info(cpu)->n_val = m_val;
+                uv_cpu_hub_info(cpu)->pnode_mask = (1 << n_val) -1;
+                uv_cpu_hub_info(cpu)->gpa_mask = (1 << (m_val + n_val)) - 1;
+                uv_cpu_hub_info(cpu)->gnode_upper = gnode_upper;
+                uv_cpu_hub_info(cpu)->global_mmr_base = mmr_base;
+                uv_cpu_hub_info(cpu)->coherency_domain_number = 0;/* ZZZ */
+                printk(KERN_DEBUG "UV cpu %d, nid %d\n", cpu, nid);
+        }
+}
+