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-rw-r--r--arch/ppc64/kernel/mpic.c4
-rw-r--r--arch/ppc64/kernel/vdso.c12
-rw-r--r--arch/ppc64/mm/imalloc.c5
-rw-r--r--arch/ppc64/mm/init.c87
4 files changed, 93 insertions, 15 deletions
diff --git a/arch/ppc64/kernel/mpic.c b/arch/ppc64/kernel/mpic.c
index cc262a05ddb..5f5bc73754d 100644
--- a/arch/ppc64/kernel/mpic.c
+++ b/arch/ppc64/kernel/mpic.c
@@ -506,8 +506,8 @@ struct mpic * __init mpic_alloc(unsigned long phys_addr,
mpic->senses_count = senses_count;
/* Map the global registers */
- mpic->gregs = ioremap(phys_addr + MPIC_GREG_BASE, 0x1000);
- mpic->tmregs = mpic->gregs + (MPIC_TIMER_BASE >> 2);
+ mpic->gregs = ioremap(phys_addr + MPIC_GREG_BASE, 0x2000);
+ mpic->tmregs = mpic->gregs + ((MPIC_TIMER_BASE - MPIC_GREG_BASE) >> 2);
BUG_ON(mpic->gregs == NULL);
/* Reset */
diff --git a/arch/ppc64/kernel/vdso.c b/arch/ppc64/kernel/vdso.c
index efa985f05ac..4aacf521e3e 100644
--- a/arch/ppc64/kernel/vdso.c
+++ b/arch/ppc64/kernel/vdso.c
@@ -176,13 +176,13 @@ static struct page * vdso_vma_nopage(struct vm_area_struct * vma,
return NOPAGE_SIGBUS;
/*
- * Last page is systemcfg, special handling here, no get_page() a
- * this is a reserved page
+ * Last page is systemcfg.
*/
if ((vma->vm_end - address) <= PAGE_SIZE)
- return virt_to_page(systemcfg);
+ pg = virt_to_page(systemcfg);
+ else
+ pg = virt_to_page(vbase + offset);
- pg = virt_to_page(vbase + offset);
get_page(pg);
DBG(" ->page count: %d\n", page_count(pg));
@@ -259,7 +259,7 @@ int arch_setup_additional_pages(struct linux_binprm *bprm, int executable_stack)
* gettimeofday will be totally dead. It's fine to use that for setting
* breakpoints in the vDSO code pages though
*/
- vma->vm_flags = VM_READ | VM_EXEC | VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC;
+ vma->vm_flags = VM_READ | VM_EXEC | VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC | VM_RESERVED;
vma->vm_flags |= mm->def_flags;
vma->vm_page_prot = protection_map[vma->vm_flags & 0x7];
vma->vm_ops = &vdso_vmops;
@@ -603,6 +603,8 @@ void __init vdso_init(void)
ClearPageReserved(pg);
get_page(pg);
}
+
+ get_page(virt_to_page(systemcfg));
}
int in_gate_area_no_task(unsigned long addr)
diff --git a/arch/ppc64/mm/imalloc.c b/arch/ppc64/mm/imalloc.c
index c65b87b9275..f4ca29cf536 100644
--- a/arch/ppc64/mm/imalloc.c
+++ b/arch/ppc64/mm/imalloc.c
@@ -300,12 +300,7 @@ void im_free(void * addr)
for (p = &imlist ; (tmp = *p) ; p = &tmp->next) {
if (tmp->addr == addr) {
*p = tmp->next;
-
- /* XXX: do we need the lock? */
- spin_lock(&init_mm.page_table_lock);
unmap_vm_area(tmp);
- spin_unlock(&init_mm.page_table_lock);
-
kfree(tmp);
up(&imlist_sem);
return;
diff --git a/arch/ppc64/mm/init.c b/arch/ppc64/mm/init.c
index be64b157afc..e2bd7776622 100644
--- a/arch/ppc64/mm/init.c
+++ b/arch/ppc64/mm/init.c
@@ -104,6 +104,8 @@ void show_mem(void)
show_free_areas();
printk("Free swap: %6ldkB\n", nr_swap_pages<<(PAGE_SHIFT-10));
for_each_pgdat(pgdat) {
+ unsigned long flags;
+ pgdat_resize_lock(pgdat, &flags);
for (i = 0; i < pgdat->node_spanned_pages; i++) {
page = pgdat_page_nr(pgdat, i);
total++;
@@ -114,6 +116,7 @@ void show_mem(void)
else if (page_count(page))
shared += page_count(page) - 1;
}
+ pgdat_resize_unlock(pgdat, &flags);
}
printk("%ld pages of RAM\n", total);
printk("%ld reserved pages\n", reserved);
@@ -155,7 +158,6 @@ static int map_io_page(unsigned long ea, unsigned long pa, int flags)
unsigned long vsid;
if (mem_init_done) {
- spin_lock(&init_mm.page_table_lock);
pgdp = pgd_offset_k(ea);
pudp = pud_alloc(&init_mm, pgdp, ea);
if (!pudp)
@@ -163,12 +165,11 @@ static int map_io_page(unsigned long ea, unsigned long pa, int flags)
pmdp = pmd_alloc(&init_mm, pudp, ea);
if (!pmdp)
return -ENOMEM;
- ptep = pte_alloc_kernel(&init_mm, pmdp, ea);
+ ptep = pte_alloc_kernel(pmdp, ea);
if (!ptep)
return -ENOMEM;
set_pte_at(&init_mm, ea, ptep, pfn_pte(pa >> PAGE_SHIFT,
__pgprot(flags)));
- spin_unlock(&init_mm.page_table_lock);
} else {
unsigned long va, vpn, hash, hpteg;
@@ -649,11 +650,14 @@ void __init mem_init(void)
#endif
for_each_pgdat(pgdat) {
+ unsigned long flags;
+ pgdat_resize_lock(pgdat, &flags);
for (i = 0; i < pgdat->node_spanned_pages; i++) {
page = pgdat_page_nr(pgdat, i);
if (PageReserved(page))
reservedpages++;
}
+ pgdat_resize_unlock(pgdat, &flags);
}
codesize = (unsigned long)&_etext - (unsigned long)&_stext;
@@ -867,3 +871,80 @@ pgprot_t phys_mem_access_prot(struct file *file, unsigned long addr,
return vma_prot;
}
EXPORT_SYMBOL(phys_mem_access_prot);
+
+#ifdef CONFIG_MEMORY_HOTPLUG
+
+void online_page(struct page *page)
+{
+ ClearPageReserved(page);
+ free_cold_page(page);
+ totalram_pages++;
+ num_physpages++;
+}
+
+/*
+ * This works only for the non-NUMA case. Later, we'll need a lookup
+ * to convert from real physical addresses to nid, that doesn't use
+ * pfn_to_nid().
+ */
+int __devinit add_memory(u64 start, u64 size)
+{
+ struct pglist_data *pgdata = NODE_DATA(0);
+ struct zone *zone;
+ unsigned long start_pfn = start >> PAGE_SHIFT;
+ unsigned long nr_pages = size >> PAGE_SHIFT;
+
+ /* this should work for most non-highmem platforms */
+ zone = pgdata->node_zones;
+
+ return __add_pages(zone, start_pfn, nr_pages);
+
+ return 0;
+}
+
+/*
+ * First pass at this code will check to determine if the remove
+ * request is within the RMO. Do not allow removal within the RMO.
+ */
+int __devinit remove_memory(u64 start, u64 size)
+{
+ struct zone *zone;
+ unsigned long start_pfn, end_pfn, nr_pages;
+
+ start_pfn = start >> PAGE_SHIFT;
+ nr_pages = size >> PAGE_SHIFT;
+ end_pfn = start_pfn + nr_pages;
+
+ printk("%s(): Attempting to remove memoy in range "
+ "%lx to %lx\n", __func__, start, start+size);
+ /*
+ * check for range within RMO
+ */
+ zone = page_zone(pfn_to_page(start_pfn));
+
+ printk("%s(): memory will be removed from "
+ "the %s zone\n", __func__, zone->name);
+
+ /*
+ * not handling removing memory ranges that
+ * overlap multiple zones yet
+ */
+ if (end_pfn > (zone->zone_start_pfn + zone->spanned_pages))
+ goto overlap;
+
+ /* make sure it is NOT in RMO */
+ if ((start < lmb.rmo_size) || ((start+size) < lmb.rmo_size)) {
+ printk("%s(): range to be removed must NOT be in RMO!\n",
+ __func__);
+ goto in_rmo;
+ }
+
+ return __remove_pages(zone, start_pfn, nr_pages);
+
+overlap:
+ printk("%s(): memory range to be removed overlaps "
+ "multiple zones!!!\n", __func__);
+in_rmo:
+ return -1;
+}
+#endif /* CONFIG_MEMORY_HOTPLUG */
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-10 00:36:16 +0000