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authorLinus Torvalds <torvalds@linux-foundation.org>2015-02-11 17:42:32 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2015-02-11 17:42:32 -0800
commitb3d6524ff7956c5a898d51a18eaecb62a60a2b84 (patch)
treecc049e7ec9edd9f5a76f286e04d8db9a1caa516a /arch/s390/mm
parent07f80d41cf24b7e6e76cd97d420167932c9a7f82 (diff)
parent6a039eab53c01a58bfff95c78fc800ca7de27c77 (diff)
downloadop-kernel-dev-b3d6524ff7956c5a898d51a18eaecb62a60a2b84.zip
op-kernel-dev-b3d6524ff7956c5a898d51a18eaecb62a60a2b84.tar.gz
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux
Pull s390 updates from Martin Schwidefsky: - The remaining patches for the z13 machine support: kernel build option for z13, the cache synonym avoidance, SMT support, compare-and-delay for spinloops and the CES5S crypto adapater. - The ftrace support for function tracing with the gcc hotpatch option. This touches common code Makefiles, Steven is ok with the changes. - The hypfs file system gets an extension to access diagnose 0x0c data in user space for performance analysis for Linux running under z/VM. - The iucv hvc console gets wildcard spport for the user id filtering. - The cacheinfo code is converted to use the generic infrastructure. - Cleanup and bug fixes. * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux: (42 commits) s390/process: free vx save area when releasing tasks s390/hypfs: Eliminate hypfs interval s390/hypfs: Add diagnose 0c support s390/cacheinfo: don't use smp_processor_id() in preemptible context s390/zcrypt: fixed domain scanning problem (again) s390/smp: increase maximum value of NR_CPUS to 512 s390/jump label: use different nop instruction s390/jump label: add sanity checks s390/mm: correct missing space when reporting user process faults s390/dasd: cleanup profiling s390/dasd: add locking for global_profile access s390/ftrace: hotpatch support for function tracing ftrace: let notrace function attribute disable hotpatching if necessary ftrace: allow architectures to specify ftrace compile options s390: reintroduce diag 44 calls for cpu_relax() s390/zcrypt: Add support for new crypto express (CEX5S) adapter. s390/zcrypt: Number of supported ap domains is not retrievable. s390/spinlock: add compare-and-delay to lock wait loops s390/tape: remove redundant if statement s390/hvc_iucv: add simple wildcard matches to the iucv allow filter ...
Diffstat (limited to 'arch/s390/mm')
-rw-r--r--arch/s390/mm/fault.c4
-rw-r--r--arch/s390/mm/init.c9
-rw-r--r--arch/s390/mm/mmap.c142
-rw-r--r--arch/s390/mm/pgtable.c6
4 files changed, 151 insertions, 10 deletions
diff --git a/arch/s390/mm/fault.c b/arch/s390/mm/fault.c
index 9065d5a..3ff8653 100644
--- a/arch/s390/mm/fault.c
+++ b/arch/s390/mm/fault.c
@@ -171,7 +171,7 @@ static void dump_pagetable(unsigned long asce, unsigned long address)
table = table + ((address >> 20) & 0x7ff);
if (bad_address(table))
goto bad;
- pr_cont(KERN_CONT "S:%016lx ", *table);
+ pr_cont("S:%016lx ", *table);
if (*table & (_SEGMENT_ENTRY_INVALID | _SEGMENT_ENTRY_LARGE))
goto out;
table = (unsigned long *)(*table & _SEGMENT_ENTRY_ORIGIN);
@@ -261,7 +261,7 @@ static inline void report_user_fault(struct pt_regs *regs, long signr)
return;
if (!printk_ratelimit())
return;
- printk(KERN_ALERT "User process fault: interruption code %04x ilc:%d",
+ printk(KERN_ALERT "User process fault: interruption code %04x ilc:%d ",
regs->int_code & 0xffff, regs->int_code >> 17);
print_vma_addr(KERN_CONT "in ", regs->psw.addr & PSW_ADDR_INSN);
printk(KERN_CONT "\n");
diff --git a/arch/s390/mm/init.c b/arch/s390/mm/init.c
index c7235e0..d35b151 100644
--- a/arch/s390/mm/init.c
+++ b/arch/s390/mm/init.c
@@ -71,13 +71,16 @@ static void __init setup_zero_pages(void)
break;
case 0x2827: /* zEC12 */
case 0x2828: /* zEC12 */
- default:
order = 5;
break;
+ case 0x2964: /* z13 */
+ default:
+ order = 7;
+ break;
}
/* Limit number of empty zero pages for small memory sizes */
- if (order > 2 && totalram_pages <= 16384)
- order = 2;
+ while (order > 2 && (totalram_pages >> 10) < (1UL << order))
+ order--;
empty_zero_page = __get_free_pages(GFP_KERNEL | __GFP_ZERO, order);
if (!empty_zero_page)
diff --git a/arch/s390/mm/mmap.c b/arch/s390/mm/mmap.c
index 9b436c2..d008f638 100644
--- a/arch/s390/mm/mmap.c
+++ b/arch/s390/mm/mmap.c
@@ -28,8 +28,12 @@
#include <linux/module.h>
#include <linux/random.h>
#include <linux/compat.h>
+#include <linux/security.h>
#include <asm/pgalloc.h>
+unsigned long mmap_rnd_mask;
+unsigned long mmap_align_mask;
+
static unsigned long stack_maxrandom_size(void)
{
if (!(current->flags & PF_RANDOMIZE))
@@ -60,8 +64,10 @@ static unsigned long mmap_rnd(void)
{
if (!(current->flags & PF_RANDOMIZE))
return 0;
- /* 8MB randomization for mmap_base */
- return (get_random_int() & 0x7ffUL) << PAGE_SHIFT;
+ if (is_32bit_task())
+ return (get_random_int() & 0x7ff) << PAGE_SHIFT;
+ else
+ return (get_random_int() & mmap_rnd_mask) << PAGE_SHIFT;
}
static unsigned long mmap_base_legacy(void)
@@ -81,6 +87,106 @@ static inline unsigned long mmap_base(void)
return STACK_TOP - stack_maxrandom_size() - mmap_rnd() - gap;
}
+unsigned long
+arch_get_unmapped_area(struct file *filp, unsigned long addr,
+ unsigned long len, unsigned long pgoff, unsigned long flags)
+{
+ struct mm_struct *mm = current->mm;
+ struct vm_area_struct *vma;
+ struct vm_unmapped_area_info info;
+ int do_color_align;
+
+ if (len > TASK_SIZE - mmap_min_addr)
+ return -ENOMEM;
+
+ if (flags & MAP_FIXED)
+ return addr;
+
+ if (addr) {
+ addr = PAGE_ALIGN(addr);
+ vma = find_vma(mm, addr);
+ if (TASK_SIZE - len >= addr && addr >= mmap_min_addr &&
+ (!vma || addr + len <= vma->vm_start))
+ return addr;
+ }
+
+ do_color_align = 0;
+ if (filp || (flags & MAP_SHARED))
+ do_color_align = !is_32bit_task();
+
+ info.flags = 0;
+ info.length = len;
+ info.low_limit = mm->mmap_base;
+ info.high_limit = TASK_SIZE;
+ info.align_mask = do_color_align ? (mmap_align_mask << PAGE_SHIFT) : 0;
+ info.align_offset = pgoff << PAGE_SHIFT;
+ return vm_unmapped_area(&info);
+}
+
+unsigned long
+arch_get_unmapped_area_topdown(struct file *filp, const unsigned long addr0,
+ const unsigned long len, const unsigned long pgoff,
+ const unsigned long flags)
+{
+ struct vm_area_struct *vma;
+ struct mm_struct *mm = current->mm;
+ unsigned long addr = addr0;
+ struct vm_unmapped_area_info info;
+ int do_color_align;
+
+ /* requested length too big for entire address space */
+ if (len > TASK_SIZE - mmap_min_addr)
+ return -ENOMEM;
+
+ if (flags & MAP_FIXED)
+ return addr;
+
+ /* requesting a specific address */
+ if (addr) {
+ addr = PAGE_ALIGN(addr);
+ vma = find_vma(mm, addr);
+ if (TASK_SIZE - len >= addr && addr >= mmap_min_addr &&
+ (!vma || addr + len <= vma->vm_start))
+ return addr;
+ }
+
+ do_color_align = 0;
+ if (filp || (flags & MAP_SHARED))
+ do_color_align = !is_32bit_task();
+
+ info.flags = VM_UNMAPPED_AREA_TOPDOWN;
+ info.length = len;
+ info.low_limit = max(PAGE_SIZE, mmap_min_addr);
+ info.high_limit = mm->mmap_base;
+ info.align_mask = do_color_align ? (mmap_align_mask << PAGE_SHIFT) : 0;
+ info.align_offset = pgoff << PAGE_SHIFT;
+ addr = vm_unmapped_area(&info);
+
+ /*
+ * A failed mmap() very likely causes application failure,
+ * so fall back to the bottom-up function here. This scenario
+ * can happen with large stack limits and large mmap()
+ * allocations.
+ */
+ if (addr & ~PAGE_MASK) {
+ VM_BUG_ON(addr != -ENOMEM);
+ info.flags = 0;
+ info.low_limit = TASK_UNMAPPED_BASE;
+ info.high_limit = TASK_SIZE;
+ addr = vm_unmapped_area(&info);
+ }
+
+ return addr;
+}
+
+unsigned long randomize_et_dyn(void)
+{
+ unsigned long base;
+
+ base = (STACK_TOP / 3 * 2) & (~mmap_align_mask << PAGE_SHIFT);
+ return base + mmap_rnd();
+}
+
#ifndef CONFIG_64BIT
/*
@@ -177,4 +283,36 @@ void arch_pick_mmap_layout(struct mm_struct *mm)
}
}
+static int __init setup_mmap_rnd(void)
+{
+ struct cpuid cpu_id;
+
+ get_cpu_id(&cpu_id);
+ switch (cpu_id.machine) {
+ case 0x9672:
+ case 0x2064:
+ case 0x2066:
+ case 0x2084:
+ case 0x2086:
+ case 0x2094:
+ case 0x2096:
+ case 0x2097:
+ case 0x2098:
+ case 0x2817:
+ case 0x2818:
+ case 0x2827:
+ case 0x2828:
+ mmap_rnd_mask = 0x7ffUL;
+ mmap_align_mask = 0UL;
+ break;
+ case 0x2964: /* z13 */
+ default:
+ mmap_rnd_mask = 0x3ff80UL;
+ mmap_align_mask = 0x7fUL;
+ break;
+ }
+ return 0;
+}
+early_initcall(setup_mmap_rnd);
+
#endif
diff --git a/arch/s390/mm/pgtable.c b/arch/s390/mm/pgtable.c
index 3cf8cc0..b2c1542 100644
--- a/arch/s390/mm/pgtable.c
+++ b/arch/s390/mm/pgtable.c
@@ -527,7 +527,7 @@ int __gmap_link(struct gmap *gmap, unsigned long gaddr, unsigned long vmaddr)
table += (gaddr >> 53) & 0x7ff;
if ((*table & _REGION_ENTRY_INVALID) &&
gmap_alloc_table(gmap, table, _REGION2_ENTRY_EMPTY,
- gaddr & 0xffe0000000000000))
+ gaddr & 0xffe0000000000000UL))
return -ENOMEM;
table = (unsigned long *)(*table & _REGION_ENTRY_ORIGIN);
}
@@ -535,7 +535,7 @@ int __gmap_link(struct gmap *gmap, unsigned long gaddr, unsigned long vmaddr)
table += (gaddr >> 42) & 0x7ff;
if ((*table & _REGION_ENTRY_INVALID) &&
gmap_alloc_table(gmap, table, _REGION3_ENTRY_EMPTY,
- gaddr & 0xfffffc0000000000))
+ gaddr & 0xfffffc0000000000UL))
return -ENOMEM;
table = (unsigned long *)(*table & _REGION_ENTRY_ORIGIN);
}
@@ -543,7 +543,7 @@ int __gmap_link(struct gmap *gmap, unsigned long gaddr, unsigned long vmaddr)
table += (gaddr >> 31) & 0x7ff;
if ((*table & _REGION_ENTRY_INVALID) &&
gmap_alloc_table(gmap, table, _SEGMENT_ENTRY_EMPTY,
- gaddr & 0xffffffff80000000))
+ gaddr & 0xffffffff80000000UL))
return -ENOMEM;
table = (unsigned long *)(*table & _REGION_ENTRY_ORIGIN);
}
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