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-rw-r--r--arch/ia64/mm/contig.c4
-rw-r--r--arch/ia64/mm/discontig.c17
-rw-r--r--arch/ia64/mm/init.c14
-rw-r--r--arch/ia64/mm/numa.c4
-rw-r--r--arch/ia64/mm/tlb.c357
5 files changed, 355 insertions, 41 deletions
diff --git a/arch/ia64/mm/contig.c b/arch/ia64/mm/contig.c
index 344f64eca7a9..798bf9835a51 100644
--- a/arch/ia64/mm/contig.c
+++ b/arch/ia64/mm/contig.c
@@ -45,8 +45,6 @@ void show_mem(void)
printk(KERN_INFO "Mem-info:\n");
show_free_areas();
- printk(KERN_INFO "Free swap: %6ldkB\n",
- nr_swap_pages<<(PAGE_SHIFT-10));
printk(KERN_INFO "Node memory in pages:\n");
for_each_online_pgdat(pgdat) {
unsigned long present;
@@ -255,7 +253,7 @@ paging_init (void)
max_zone_pfns[ZONE_NORMAL] = max_low_pfn;
#ifdef CONFIG_VIRTUAL_MEM_MAP
- efi_memmap_walk(register_active_ranges, NULL);
+ efi_memmap_walk(filter_memory, register_active_ranges);
efi_memmap_walk(find_largest_hole, (u64 *)&max_gap);
if (max_gap < LARGE_GAP) {
vmem_map = (struct page *) 0;
diff --git a/arch/ia64/mm/discontig.c b/arch/ia64/mm/discontig.c
index ee5e68b2af94..544dc420c65e 100644
--- a/arch/ia64/mm/discontig.c
+++ b/arch/ia64/mm/discontig.c
@@ -104,7 +104,7 @@ static int __meminit early_nr_cpus_node(int node)
{
int cpu, n = 0;
- for (cpu = 0; cpu < NR_CPUS; cpu++)
+ for_each_possible_early_cpu(cpu)
if (node == node_cpuid[cpu].nid)
n++;
@@ -124,6 +124,7 @@ static unsigned long __meminit compute_pernodesize(int node)
pernodesize += node * L1_CACHE_BYTES;
pernodesize += L1_CACHE_ALIGN(sizeof(pg_data_t));
pernodesize += L1_CACHE_ALIGN(sizeof(struct ia64_node_data));
+ pernodesize += L1_CACHE_ALIGN(sizeof(pg_data_t));
pernodesize = PAGE_ALIGN(pernodesize);
return pernodesize;
}
@@ -142,7 +143,7 @@ static void *per_cpu_node_setup(void *cpu_data, int node)
#ifdef CONFIG_SMP
int cpu;
- for (cpu = 0; cpu < NR_CPUS; cpu++) {
+ for_each_possible_early_cpu(cpu) {
if (node == node_cpuid[cpu].nid) {
memcpy(__va(cpu_data), __phys_per_cpu_start,
__per_cpu_end - __per_cpu_start);
@@ -345,7 +346,7 @@ static void __init initialize_pernode_data(void)
#ifdef CONFIG_SMP
/* Set the node_data pointer for each per-cpu struct */
- for (cpu = 0; cpu < NR_CPUS; cpu++) {
+ for_each_possible_early_cpu(cpu) {
node = node_cpuid[cpu].nid;
per_cpu(cpu_info, cpu).node_data = mem_data[node].node_data;
}
@@ -444,7 +445,7 @@ void __init find_memory(void)
mem_data[node].min_pfn = ~0UL;
}
- efi_memmap_walk(register_active_ranges, NULL);
+ efi_memmap_walk(filter_memory, register_active_ranges);
/*
* Initialize the boot memory maps in reverse order since that's
@@ -493,13 +494,9 @@ void __cpuinit *per_cpu_init(void)
int cpu;
static int first_time = 1;
-
- if (smp_processor_id() != 0)
- return __per_cpu_start + __per_cpu_offset[smp_processor_id()];
-
if (first_time) {
first_time = 0;
- for (cpu = 0; cpu < NR_CPUS; cpu++)
+ for_each_possible_early_cpu(cpu)
per_cpu(local_per_cpu_offset, cpu) = __per_cpu_offset[cpu];
}
@@ -522,8 +519,6 @@ void show_mem(void)
printk(KERN_INFO "Mem-info:\n");
show_free_areas();
- printk(KERN_INFO "Free swap: %6ldkB\n",
- nr_swap_pages<<(PAGE_SHIFT-10));
printk(KERN_INFO "Node memory in pages:\n");
for_each_online_pgdat(pgdat) {
unsigned long present;
diff --git a/arch/ia64/mm/init.c b/arch/ia64/mm/init.c
index a4ca657c72c6..5c1de53c8c1c 100644
--- a/arch/ia64/mm/init.c
+++ b/arch/ia64/mm/init.c
@@ -58,7 +58,6 @@ __ia64_sync_icache_dcache (pte_t pte)
{
unsigned long addr;
struct page *page;
- unsigned long order;
page = pte_page(pte);
addr = (unsigned long) page_address(page);
@@ -66,12 +65,7 @@ __ia64_sync_icache_dcache (pte_t pte)
if (test_bit(PG_arch_1, &page->flags))
return; /* i-cache is already coherent with d-cache */
- if (PageCompound(page)) {
- order = compound_order(page);
- flush_icache_range(addr, addr + (1UL << order << PAGE_SHIFT));
- }
- else
- flush_icache_range(addr, addr + PAGE_SIZE);
+ flush_icache_range(addr, addr + (PAGE_SIZE << compound_order(page)));
set_bit(PG_arch_1, &page->flags); /* mark page as clean */
}
@@ -553,12 +547,10 @@ find_largest_hole (u64 start, u64 end, void *arg)
#endif /* CONFIG_VIRTUAL_MEM_MAP */
int __init
-register_active_ranges(u64 start, u64 end, void *arg)
+register_active_ranges(u64 start, u64 len, int nid)
{
- int nid = paddr_to_nid(__pa(start));
+ u64 end = start + len;
- if (nid < 0)
- nid = 0;
#ifdef CONFIG_KEXEC
if (start > crashk_res.start && start < crashk_res.end)
start = crashk_res.end;
diff --git a/arch/ia64/mm/numa.c b/arch/ia64/mm/numa.c
index 7807fc5c0422..b73bf1838e57 100644
--- a/arch/ia64/mm/numa.c
+++ b/arch/ia64/mm/numa.c
@@ -27,7 +27,9 @@
*/
int num_node_memblks;
struct node_memblk_s node_memblk[NR_NODE_MEMBLKS];
-struct node_cpuid_s node_cpuid[NR_CPUS];
+struct node_cpuid_s node_cpuid[NR_CPUS] =
+ { [0 ... NR_CPUS-1] = { .phys_id = 0, .nid = NUMA_NO_NODE } };
+
/*
* This is a matrix with "distances" between nodes, they should be
* proportional to the memory access latency ratios.
diff --git a/arch/ia64/mm/tlb.c b/arch/ia64/mm/tlb.c
index 655da240d13c..d52ec4e83409 100644
--- a/arch/ia64/mm/tlb.c
+++ b/arch/ia64/mm/tlb.c
@@ -11,6 +11,9 @@
* Rohit Seth <rohit.seth@intel.com>
* Ken Chen <kenneth.w.chen@intel.com>
* Christophe de Dinechin <ddd@hp.com>: Avoid ptc.e on memory allocation
+ * Copyright (C) 2007 Intel Corp
+ * Fenghua Yu <fenghua.yu@intel.com>
+ * Add multiple ptc.g/ptc.ga instruction support in global tlb purge.
*/
#include <linux/module.h>
#include <linux/init.h>
@@ -26,6 +29,9 @@
#include <asm/pal.h>
#include <asm/tlbflush.h>
#include <asm/dma.h>
+#include <asm/processor.h>
+#include <asm/sal.h>
+#include <asm/tlb.h>
static struct {
unsigned long mask; /* mask of supported purge page-sizes */
@@ -39,6 +45,10 @@ struct ia64_ctx ia64_ctx = {
};
DEFINE_PER_CPU(u8, ia64_need_tlb_flush);
+DEFINE_PER_CPU(u8, ia64_tr_num); /*Number of TR slots in current processor*/
+DEFINE_PER_CPU(u8, ia64_tr_used); /*Max Slot number used by kernel*/
+
+struct ia64_tr_entry __per_cpu_idtrs[NR_CPUS][2][IA64_TR_ALLOC_MAX];
/*
* Initializes the ia64_ctx.bitmap array based on max_ctx+1.
@@ -84,14 +94,140 @@ wrap_mmu_context (struct mm_struct *mm)
local_flush_tlb_all();
}
+/*
+ * Implement "spinaphores" ... like counting semaphores, but they
+ * spin instead of sleeping. If there are ever any other users for
+ * this primitive it can be moved up to a spinaphore.h header.
+ */
+struct spinaphore {
+ atomic_t cur;
+};
+
+static inline void spinaphore_init(struct spinaphore *ss, int val)
+{
+ atomic_set(&ss->cur, val);
+}
+
+static inline void down_spin(struct spinaphore *ss)
+{
+ while (unlikely(!atomic_add_unless(&ss->cur, -1, 0)))
+ while (atomic_read(&ss->cur) == 0)
+ cpu_relax();
+}
+
+static inline void up_spin(struct spinaphore *ss)
+{
+ atomic_add(1, &ss->cur);
+}
+
+static struct spinaphore ptcg_sem;
+static u16 nptcg = 1;
+static int need_ptcg_sem = 1;
+static int toolatetochangeptcgsem = 0;
+
+/*
+ * Kernel parameter "nptcg=" overrides max number of concurrent global TLB
+ * purges which is reported from either PAL or SAL PALO.
+ *
+ * We don't have sanity checking for nptcg value. It's the user's responsibility
+ * for valid nptcg value on the platform. Otherwise, kernel may hang in some
+ * cases.
+ */
+static int __init
+set_nptcg(char *str)
+{
+ int value = 0;
+
+ get_option(&str, &value);
+ setup_ptcg_sem(value, NPTCG_FROM_KERNEL_PARAMETER);
+
+ return 1;
+}
+
+__setup("nptcg=", set_nptcg);
+
+/*
+ * Maximum number of simultaneous ptc.g purges in the system can
+ * be defined by PAL_VM_SUMMARY (in which case we should take
+ * the smallest value for any cpu in the system) or by the PAL
+ * override table (in which case we should ignore the value from
+ * PAL_VM_SUMMARY).
+ *
+ * Kernel parameter "nptcg=" overrides maximum number of simultanesous ptc.g
+ * purges defined in either PAL_VM_SUMMARY or PAL override table. In this case,
+ * we should ignore the value from either PAL_VM_SUMMARY or PAL override table.
+ *
+ * Complicating the logic here is the fact that num_possible_cpus()
+ * isn't fully setup until we start bringing cpus online.
+ */
+void
+setup_ptcg_sem(int max_purges, int nptcg_from)
+{
+ static int kp_override;
+ static int palo_override;
+ static int firstcpu = 1;
+
+ if (toolatetochangeptcgsem) {
+ BUG_ON(max_purges < nptcg);
+ return;
+ }
+
+ if (nptcg_from == NPTCG_FROM_KERNEL_PARAMETER) {
+ kp_override = 1;
+ nptcg = max_purges;
+ goto resetsema;
+ }
+ if (kp_override) {
+ need_ptcg_sem = num_possible_cpus() > nptcg;
+ return;
+ }
+
+ if (nptcg_from == NPTCG_FROM_PALO) {
+ palo_override = 1;
+
+ /* In PALO max_purges == 0 really means it! */
+ if (max_purges == 0)
+ panic("Whoa! Platform does not support global TLB purges.\n");
+ nptcg = max_purges;
+ if (nptcg == PALO_MAX_TLB_PURGES) {
+ need_ptcg_sem = 0;
+ return;
+ }
+ goto resetsema;
+ }
+ if (palo_override) {
+ if (nptcg != PALO_MAX_TLB_PURGES)
+ need_ptcg_sem = (num_possible_cpus() > nptcg);
+ return;
+ }
+
+ /* In PAL_VM_SUMMARY max_purges == 0 actually means 1 */
+ if (max_purges == 0) max_purges = 1;
+
+ if (firstcpu) {
+ nptcg = max_purges;
+ firstcpu = 0;
+ }
+ if (max_purges < nptcg)
+ nptcg = max_purges;
+ if (nptcg == PAL_MAX_PURGES) {
+ need_ptcg_sem = 0;
+ return;
+ } else
+ need_ptcg_sem = (num_possible_cpus() > nptcg);
+
+resetsema:
+ spinaphore_init(&ptcg_sem, max_purges);
+}
+
void
ia64_global_tlb_purge (struct mm_struct *mm, unsigned long start,
unsigned long end, unsigned long nbits)
{
- static DEFINE_SPINLOCK(ptcg_lock);
-
struct mm_struct *active_mm = current->active_mm;
+ toolatetochangeptcgsem = 1;
+
if (mm != active_mm) {
/* Restore region IDs for mm */
if (mm && active_mm) {
@@ -102,19 +238,20 @@ ia64_global_tlb_purge (struct mm_struct *mm, unsigned long start,
}
}
- /* HW requires global serialization of ptc.ga. */
- spin_lock(&ptcg_lock);
- {
- do {
- /*
- * Flush ALAT entries also.
- */
- ia64_ptcga(start, (nbits<<2));
- ia64_srlz_i();
- start += (1UL << nbits);
- } while (start < end);
- }
- spin_unlock(&ptcg_lock);
+ if (need_ptcg_sem)
+ down_spin(&ptcg_sem);
+
+ do {
+ /*
+ * Flush ALAT entries also.
+ */
+ ia64_ptcga(start, (nbits << 2));
+ ia64_srlz_i();
+ start += (1UL << nbits);
+ } while (start < end);
+
+ if (need_ptcg_sem)
+ up_spin(&ptcg_sem);
if (mm != active_mm) {
activate_context(active_mm);
@@ -190,6 +327,9 @@ ia64_tlb_init (void)
ia64_ptce_info_t uninitialized_var(ptce_info); /* GCC be quiet */
unsigned long tr_pgbits;
long status;
+ pal_vm_info_1_u_t vm_info_1;
+ pal_vm_info_2_u_t vm_info_2;
+ int cpu = smp_processor_id();
if ((status = ia64_pal_vm_page_size(&tr_pgbits, &purge.mask)) != 0) {
printk(KERN_ERR "PAL_VM_PAGE_SIZE failed with status=%ld; "
@@ -206,4 +346,191 @@ ia64_tlb_init (void)
local_cpu_data->ptce_stride[1] = ptce_info.stride[1];
local_flush_tlb_all(); /* nuke left overs from bootstrapping... */
+ status = ia64_pal_vm_summary(&vm_info_1, &vm_info_2);
+
+ if (status) {
+ printk(KERN_ERR "ia64_pal_vm_summary=%ld\n", status);
+ per_cpu(ia64_tr_num, cpu) = 8;
+ return;
+ }
+ per_cpu(ia64_tr_num, cpu) = vm_info_1.pal_vm_info_1_s.max_itr_entry+1;
+ if (per_cpu(ia64_tr_num, cpu) >
+ (vm_info_1.pal_vm_info_1_s.max_dtr_entry+1))
+ per_cpu(ia64_tr_num, cpu) =
+ vm_info_1.pal_vm_info_1_s.max_dtr_entry+1;
+ if (per_cpu(ia64_tr_num, cpu) > IA64_TR_ALLOC_MAX) {
+ per_cpu(ia64_tr_num, cpu) = IA64_TR_ALLOC_MAX;
+ printk(KERN_DEBUG "TR register number exceeds IA64_TR_ALLOC_MAX!"
+ "IA64_TR_ALLOC_MAX should be extended\n");
+ }
+}
+
+/*
+ * is_tr_overlap
+ *
+ * Check overlap with inserted TRs.
+ */
+static int is_tr_overlap(struct ia64_tr_entry *p, u64 va, u64 log_size)
+{
+ u64 tr_log_size;
+ u64 tr_end;
+ u64 va_rr = ia64_get_rr(va);
+ u64 va_rid = RR_TO_RID(va_rr);
+ u64 va_end = va + (1<<log_size) - 1;
+
+ if (va_rid != RR_TO_RID(p->rr))
+ return 0;
+ tr_log_size = (p->itir & 0xff) >> 2;
+ tr_end = p->ifa + (1<<tr_log_size) - 1;
+
+ if (va > tr_end || p->ifa > va_end)
+ return 0;
+ return 1;
+
+}
+
+/*
+ * ia64_insert_tr in virtual mode. Allocate a TR slot
+ *
+ * target_mask : 0x1 : itr, 0x2 : dtr, 0x3 : idtr
+ *
+ * va : virtual address.
+ * pte : pte entries inserted.
+ * log_size: range to be covered.
+ *
+ * Return value: <0 : error No.
+ *
+ * >=0 : slot number allocated for TR.
+ * Must be called with preemption disabled.
+ */
+int ia64_itr_entry(u64 target_mask, u64 va, u64 pte, u64 log_size)
+{
+ int i, r;
+ unsigned long psr;
+ struct ia64_tr_entry *p;
+ int cpu = smp_processor_id();
+
+ r = -EINVAL;
+ /*Check overlap with existing TR entries*/
+ if (target_mask & 0x1) {
+ p = &__per_cpu_idtrs[cpu][0][0];
+ for (i = IA64_TR_ALLOC_BASE; i <= per_cpu(ia64_tr_used, cpu);
+ i++, p++) {
+ if (p->pte & 0x1)
+ if (is_tr_overlap(p, va, log_size)) {
+ printk(KERN_DEBUG "Overlapped Entry"
+ "Inserted for TR Reigster!!\n");
+ goto out;
+ }
+ }
+ }
+ if (target_mask & 0x2) {
+ p = &__per_cpu_idtrs[cpu][1][0];
+ for (i = IA64_TR_ALLOC_BASE; i <= per_cpu(ia64_tr_used, cpu);
+ i++, p++) {
+ if (p->pte & 0x1)
+ if (is_tr_overlap(p, va, log_size)) {
+ printk(KERN_DEBUG "Overlapped Entry"
+ "Inserted for TR Reigster!!\n");
+ goto out;
+ }
+ }
+ }
+
+ for (i = IA64_TR_ALLOC_BASE; i < per_cpu(ia64_tr_num, cpu); i++) {
+ switch (target_mask & 0x3) {
+ case 1:
+ if (!(__per_cpu_idtrs[cpu][0][i].pte & 0x1))
+ goto found;
+ continue;
+ case 2:
+ if (!(__per_cpu_idtrs[cpu][1][i].pte & 0x1))
+ goto found;
+ continue;
+ case 3:
+ if (!(__per_cpu_idtrs[cpu][0][i].pte & 0x1) &&
+ !(__per_cpu_idtrs[cpu][1][i].pte & 0x1))
+ goto found;
+ continue;
+ default:
+ r = -EINVAL;
+ goto out;
+ }
+ }
+found:
+ if (i >= per_cpu(ia64_tr_num, cpu))
+ return -EBUSY;
+
+ /*Record tr info for mca hander use!*/
+ if (i > per_cpu(ia64_tr_used, cpu))
+ per_cpu(ia64_tr_used, cpu) = i;
+
+ psr = ia64_clear_ic();
+ if (target_mask & 0x1) {
+ ia64_itr(0x1, i, va, pte, log_size);
+ ia64_srlz_i();
+ p = &__per_cpu_idtrs[cpu][0][i];
+ p->ifa = va;
+ p->pte = pte;
+ p->itir = log_size << 2;
+ p->rr = ia64_get_rr(va);
+ }
+ if (target_mask & 0x2) {
+ ia64_itr(0x2, i, va, pte, log_size);
+ ia64_srlz_i();
+ p = &__per_cpu_idtrs[cpu][1][i];
+ p->ifa = va;
+ p->pte = pte;
+ p->itir = log_size << 2;
+ p->rr = ia64_get_rr(va);
+ }
+ ia64_set_psr(psr);
+ r = i;
+out:
+ return r;
+}
+EXPORT_SYMBOL_GPL(ia64_itr_entry);
+
+/*
+ * ia64_purge_tr
+ *
+ * target_mask: 0x1: purge itr, 0x2 : purge dtr, 0x3 purge idtr.
+ * slot: slot number to be freed.
+ *
+ * Must be called with preemption disabled.
+ */
+void ia64_ptr_entry(u64 target_mask, int slot)
+{
+ int cpu = smp_processor_id();
+ int i;
+ struct ia64_tr_entry *p;
+
+ if (slot < IA64_TR_ALLOC_BASE || slot >= per_cpu(ia64_tr_num, cpu))
+ return;
+
+ if (target_mask & 0x1) {
+ p = &__per_cpu_idtrs[cpu][0][slot];
+ if ((p->pte&0x1) && is_tr_overlap(p, p->ifa, p->itir>>2)) {
+ p->pte = 0;
+ ia64_ptr(0x1, p->ifa, p->itir>>2);
+ ia64_srlz_i();
+ }
+ }
+
+ if (target_mask & 0x2) {
+ p = &__per_cpu_idtrs[cpu][1][slot];
+ if ((p->pte & 0x1) && is_tr_overlap(p, p->ifa, p->itir>>2)) {
+ p->pte = 0;
+ ia64_ptr(0x2, p->ifa, p->itir>>2);
+ ia64_srlz_i();
+ }
+ }
+
+ for (i = per_cpu(ia64_tr_used, cpu); i >= IA64_TR_ALLOC_BASE; i--) {
+ if ((__per_cpu_idtrs[cpu][0][i].pte & 0x1) ||
+ (__per_cpu_idtrs[cpu][1][i].pte & 0x1))
+ break;
+ }
+ per_cpu(ia64_tr_used, cpu) = i;
}
+EXPORT_SYMBOL_GPL(ia64_ptr_entry);
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.