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Merge branch 'for-linus' of git://git390.osdl.marist.edu/pub/scm/linux-2.6

Browse Source 
* 'for-linus' of git://git390.osdl.marist.edu/pub/scm/linux-2.6:
  [S390] dynamic page tables.
  [S390] Add four level page tables for CONFIG_64BIT=y.
  [S390] 1K/2K page table pages.
  [S390] Remove a.out header file.
  [S390] sclp_vt220: Fix vt220 initialization
  [S390] qdio: avoid hang when establishing qdio queues
  [S390] VMEM_MAX_PHYS overflow on 31 bit.
  [S390] zcrypt: Do not start ap poll thread per default
  [S390] Fix __ffs_word_loop/__ffz_word_loop inlnie assembly.
  [S390] Wire up new timerfd syscalls.
  [S390] Update default configuration.
This commit is contained in:
Linus Torvalds 2008-02-09 11:15:23 -08:00
commit 531021f2ca
27 changed files with 693 additions and 346 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

87
arch/s390/defconfig
View File

@ -1,12 +1,13 @@
#
# Automatically generated make config: don't edit
# Linux kernel version: 2.6.23
# Mon Oct 22 12:10:44 2007
# Linux kernel version: 2.6.24
# Sat Feb 9 12:13:01 2008
#
CONFIG_MMU=y
CONFIG_ZONE_DMA=y
CONFIG_LOCKDEP_SUPPORT=y
CONFIG_STACKTRACE_SUPPORT=y
CONFIG_HAVE_LATENCYTOP_SUPPORT=y
CONFIG_RWSEM_XCHGADD_ALGORITHM=y
# CONFIG_ARCH_HAS_ILOG2_U32 is not set
# CONFIG_ARCH_HAS_ILOG2_U64 is not set
@ -15,6 +16,7 @@ CONFIG_GENERIC_TIME=y
CONFIG_GENERIC_BUG=y
CONFIG_NO_IOMEM=y
CONFIG_NO_DMA=y
CONFIG_GENERIC_LOCKBREAK=y
CONFIG_S390=y
CONFIG_DEFCONFIG_LIST="/lib/modules/$UNAME_RELEASE/.config"
@ -32,7 +34,6 @@ CONFIG_SYSVIPC_SYSCTL=y
CONFIG_POSIX_MQUEUE=y
# CONFIG_BSD_PROCESS_ACCT is not set
# CONFIG_TASKSTATS is not set
# CONFIG_USER_NS is not set
CONFIG_AUDIT=y
# CONFIG_AUDITSYSCALL is not set
CONFIG_IKCONFIG=y
@ -41,13 +42,19 @@ CONFIG_LOG_BUF_SHIFT=17
CONFIG_CGROUPS=y
# CONFIG_CGROUP_DEBUG is not set
CONFIG_CGROUP_NS=y
CONFIG_CGROUP_CPUACCT=y
# CONFIG_CPUSETS is not set
CONFIG_FAIR_GROUP_SCHED=y
CONFIG_FAIR_USER_SCHED=y
# CONFIG_FAIR_CGROUP_SCHED is not set
# CONFIG_CGROUP_CPUACCT is not set
# CONFIG_RESOURCE_COUNTERS is not set
CONFIG_SYSFS_DEPRECATED=y
# CONFIG_RELAY is not set
CONFIG_NAMESPACES=y
CONFIG_UTS_NS=y
CONFIG_IPC_NS=y
# CONFIG_USER_NS is not set
# CONFIG_PID_NS is not set
CONFIG_BLK_DEV_INITRD=y
CONFIG_INITRAMFS_SOURCE=""
# CONFIG_CC_OPTIMIZE_FOR_SIZE is not set
@ -61,17 +68,26 @@ CONFIG_HOTPLUG=y
CONFIG_PRINTK=y
CONFIG_BUG=y
CONFIG_ELF_CORE=y
# CONFIG_COMPAT_BRK is not set
CONFIG_BASE_FULL=y
CONFIG_FUTEX=y
CONFIG_ANON_INODES=y
CONFIG_EPOLL=y
CONFIG_SIGNALFD=y
CONFIG_TIMERFD=y
CONFIG_EVENTFD=y
CONFIG_SHMEM=y
CONFIG_VM_EVENT_COUNTERS=y
CONFIG_SLAB=y
# CONFIG_SLUB is not set
# CONFIG_SLOB is not set
# CONFIG_PROFILING is not set
# CONFIG_MARKERS is not set
CONFIG_HAVE_OPROFILE=y
CONFIG_KPROBES=y
CONFIG_HAVE_KPROBES=y
CONFIG_PROC_PAGE_MONITOR=y
CONFIG_SLABINFO=y
CONFIG_RT_MUTEXES=y
# CONFIG_TINY_SHMEM is not set
CONFIG_BASE_SMALL=0
@ -99,6 +115,8 @@ CONFIG_DEFAULT_DEADLINE=y
# CONFIG_DEFAULT_CFQ is not set
# CONFIG_DEFAULT_NOOP is not set
CONFIG_DEFAULT_IOSCHED="deadline"
CONFIG_CLASSIC_RCU=y
# CONFIG_PREEMPT_RCU is not set
#
# Base setup
@ -137,7 +155,7 @@ CONFIG_ARCH_POPULATES_NODE_MAP=y
# CONFIG_PREEMPT_NONE is not set
# CONFIG_PREEMPT_VOLUNTARY is not set
CONFIG_PREEMPT=y
CONFIG_PREEMPT_BKL=y
# CONFIG_RCU_TRACE is not set
CONFIG_SELECT_MEMORY_MODEL=y
CONFIG_FLATMEM_MANUAL=y
# CONFIG_DISCONTIGMEM_MANUAL is not set
@ -151,7 +169,6 @@ CONFIG_RESOURCES_64BIT=y
CONFIG_ZONE_DMA_FLAG=1
CONFIG_BOUNCE=y
CONFIG_VIRT_TO_BUS=y
CONFIG_HOLES_IN_ZONE=y
#
# I/O subsystem configuration
@ -180,6 +197,7 @@ CONFIG_HZ_100=y
# CONFIG_HZ_300 is not set
# CONFIG_HZ_1000 is not set
CONFIG_HZ=100
# CONFIG_SCHED_HRTICK is not set
CONFIG_NO_IDLE_HZ=y
CONFIG_NO_IDLE_HZ_INIT=y
CONFIG_S390_HYPFS_FS=y
@ -201,6 +219,7 @@ CONFIG_XFRM=y
# CONFIG_XFRM_USER is not set
# CONFIG_XFRM_SUB_POLICY is not set
# CONFIG_XFRM_MIGRATE is not set
# CONFIG_XFRM_STATISTICS is not set
CONFIG_NET_KEY=y
# CONFIG_NET_KEY_MIGRATE is not set
CONFIG_IUCV=m
@ -251,6 +270,7 @@ CONFIG_IPV6_SIT=y
# CONFIG_NETWORK_SECMARK is not set
CONFIG_NETFILTER=y
# CONFIG_NETFILTER_DEBUG is not set
CONFIG_NETFILTER_ADVANCED=y
#
# Core Netfilter Configuration
@ -258,7 +278,6 @@ CONFIG_NETFILTER=y
CONFIG_NETFILTER_NETLINK=m
CONFIG_NETFILTER_NETLINK_QUEUE=m
CONFIG_NETFILTER_NETLINK_LOG=m
CONFIG_NF_CONNTRACK_ENABLED=m
CONFIG_NF_CONNTRACK=m
# CONFIG_NF_CT_ACCT is not set
# CONFIG_NF_CONNTRACK_MARK is not set
@ -286,7 +305,7 @@ CONFIG_NF_CONNTRACK=m
# CONFIG_IP_NF_ARPTABLES is not set
#
# IPv6: Netfilter Configuration (EXPERIMENTAL)
# IPv6: Netfilter Configuration
#
# CONFIG_NF_CONNTRACK_IPV6 is not set
# CONFIG_IP6_NF_QUEUE is not set
@ -343,6 +362,7 @@ CONFIG_NET_CLS_U32=m
CONFIG_CLS_U32_MARK=y
CONFIG_NET_CLS_RSVP=m
CONFIG_NET_CLS_RSVP6=m
CONFIG_NET_CLS_FLOW=m
# CONFIG_NET_EMATCH is not set
CONFIG_NET_CLS_ACT=y
CONFIG_NET_ACT_POLICE=y
@ -351,7 +371,6 @@ CONFIG_NET_ACT_POLICE=y
CONFIG_NET_ACT_NAT=m
# CONFIG_NET_ACT_PEDIT is not set
# CONFIG_NET_ACT_SIMP is not set
CONFIG_NET_CLS_POLICE=y
# CONFIG_NET_CLS_IND is not set
CONFIG_NET_SCH_FIFO=y
@ -360,6 +379,15 @@ CONFIG_NET_SCH_FIFO=y
#
# CONFIG_NET_PKTGEN is not set
# CONFIG_NET_TCPPROBE is not set
CONFIG_CAN=m
CONFIG_CAN_RAW=m
CONFIG_CAN_BCM=m
#
# CAN Device Drivers
#
CONFIG_CAN_VCAN=m
# CONFIG_CAN_DEBUG_DEVICES is not set
# CONFIG_AF_RXRPC is not set
# CONFIG_RFKILL is not set
# CONFIG_NET_9P is not set
@ -389,7 +417,7 @@ CONFIG_BLK_DEV_NBD=m
CONFIG_BLK_DEV_RAM=y
CONFIG_BLK_DEV_RAM_COUNT=16
CONFIG_BLK_DEV_RAM_SIZE=4096
CONFIG_BLK_DEV_RAM_BLOCKSIZE=1024
CONFIG_BLK_DEV_XIP=y
# CONFIG_CDROM_PKTCDVD is not set
# CONFIG_ATA_OVER_ETH is not set
@ -406,6 +434,7 @@ CONFIG_DASD_DIAG=y
CONFIG_DASD_EER=y
CONFIG_MISC_DEVICES=y
# CONFIG_EEPROM_93CX6 is not set
# CONFIG_ENCLOSURE_SERVICES is not set
#
# SCSI device support
@ -487,6 +516,7 @@ CONFIG_NET_ETHERNET=y
# CONFIG_IBM_NEW_EMAC_TAH is not set
# CONFIG_IBM_NEW_EMAC_EMAC4 is not set
CONFIG_NETDEV_1000=y
# CONFIG_E1000E_ENABLED is not set
CONFIG_NETDEV_10000=y
# CONFIG_TR is not set
# CONFIG_WAN is not set
@ -508,7 +538,6 @@ CONFIG_QETH=y
CONFIG_CCWGROUP=y
# CONFIG_PPP is not set
# CONFIG_SLIP is not set
# CONFIG_SHAPER is not set
# CONFIG_NETCONSOLE is not set
# CONFIG_NETPOLL is not set
# CONFIG_NET_POLL_CONTROLLER is not set
@ -558,6 +587,7 @@ CONFIG_S390_TAPE_34XX=m
CONFIG_MONWRITER=m
CONFIG_S390_VMUR=m
# CONFIG_POWER_SUPPLY is not set
# CONFIG_THERMAL is not set
# CONFIG_WATCHDOG is not set
#
@ -584,12 +614,10 @@ CONFIG_FS_POSIX_ACL=y
# CONFIG_XFS_FS is not set
# CONFIG_GFS2_FS is not set
# CONFIG_OCFS2_FS is not set
# CONFIG_MINIX_FS is not set
# CONFIG_ROMFS_FS is not set
CONFIG_DNOTIFY=y
CONFIG_INOTIFY=y
CONFIG_INOTIFY_USER=y
# CONFIG_QUOTA is not set
CONFIG_DNOTIFY=y
# CONFIG_AUTOFS_FS is not set
# CONFIG_AUTOFS4_FS is not set
# CONFIG_FUSE_FS is not set
@ -632,8 +660,10 @@ CONFIG_CONFIGFS_FS=m
# CONFIG_EFS_FS is not set
# CONFIG_CRAMFS is not set
# CONFIG_VXFS_FS is not set
# CONFIG_MINIX_FS is not set
# CONFIG_HPFS_FS is not set
# CONFIG_QNX4FS_FS is not set
# CONFIG_ROMFS_FS is not set
# CONFIG_SYSV_FS is not set
# CONFIG_UFS_FS is not set
CONFIG_NETWORK_FILESYSTEMS=y
@ -686,16 +716,13 @@ CONFIG_MSDOS_PARTITION=y
# CONFIG_NLS is not set
CONFIG_DLM=m
# CONFIG_DLM_DEBUG is not set
CONFIG_INSTRUMENTATION=y
# CONFIG_PROFILING is not set
CONFIG_KPROBES=y
# CONFIG_MARKERS is not set
#
# Kernel hacking
#
CONFIG_TRACE_IRQFLAGS_SUPPORT=y
# CONFIG_PRINTK_TIME is not set
CONFIG_ENABLE_WARN_DEPRECATED=y
CONFIG_ENABLE_MUST_CHECK=y
CONFIG_MAGIC_SYSRQ=y
# CONFIG_UNUSED_SYMBOLS is not set
@ -721,12 +748,18 @@ CONFIG_DEBUG_BUGVERBOSE=y
# CONFIG_DEBUG_INFO is not set
# CONFIG_DEBUG_VM is not set
# CONFIG_DEBUG_LIST is not set
# CONFIG_DEBUG_SG is not set
# CONFIG_FRAME_POINTER is not set
CONFIG_FORCED_INLINING=y
# CONFIG_RCU_TORTURE_TEST is not set
# CONFIG_KPROBES_SANITY_TEST is not set
# CONFIG_BACKTRACE_SELF_TEST is not set
# CONFIG_LKDTM is not set
# CONFIG_FAULT_INJECTION is not set
# CONFIG_LATENCYTOP is not set
CONFIG_SAMPLES=y
# CONFIG_SAMPLE_KOBJECT is not set
# CONFIG_DEBUG_PAGEALLOC is not set
#
# Security options
@ -738,6 +771,7 @@ CONFIG_CRYPTO=y
CONFIG_CRYPTO_ALGAPI=y
CONFIG_CRYPTO_AEAD=m
CONFIG_CRYPTO_BLKCIPHER=y
CONFIG_CRYPTO_SEQIV=m
CONFIG_CRYPTO_HASH=m
CONFIG_CRYPTO_MANAGER=y
CONFIG_CRYPTO_HMAC=m
@ -745,17 +779,20 @@ CONFIG_CRYPTO_HMAC=m
# CONFIG_CRYPTO_NULL is not set
# CONFIG_CRYPTO_MD4 is not set
CONFIG_CRYPTO_MD5=m
# CONFIG_CRYPTO_SHA1 is not set
CONFIG_CRYPTO_SHA1=m
# CONFIG_CRYPTO_SHA256 is not set
# CONFIG_CRYPTO_SHA512 is not set
# CONFIG_CRYPTO_WP512 is not set
# CONFIG_CRYPTO_TGR192 is not set
# CONFIG_CRYPTO_GF128MUL is not set
CONFIG_CRYPTO_GF128MUL=m
CONFIG_CRYPTO_ECB=m
CONFIG_CRYPTO_CBC=y
CONFIG_CRYPTO_PCBC=m
# CONFIG_CRYPTO_LRW is not set
# CONFIG_CRYPTO_XTS is not set
CONFIG_CRYPTO_CTR=m
CONFIG_CRYPTO_GCM=m
CONFIG_CRYPTO_CCM=m
# CONFIG_CRYPTO_CRYPTD is not set
# CONFIG_CRYPTO_DES is not set
CONFIG_CRYPTO_FCRYPT=m
@ -770,20 +807,22 @@ CONFIG_CRYPTO_FCRYPT=m
# CONFIG_CRYPTO_KHAZAD is not set
# CONFIG_CRYPTO_ANUBIS is not set
CONFIG_CRYPTO_SEED=m
CONFIG_CRYPTO_SALSA20=m
# CONFIG_CRYPTO_DEFLATE is not set
# CONFIG_CRYPTO_MICHAEL_MIC is not set
# CONFIG_CRYPTO_CRC32C is not set
CONFIG_CRYPTO_CAMELLIA=m
# CONFIG_CRYPTO_TEST is not set
CONFIG_CRYPTO_AUTHENC=m
CONFIG_CRYPTO_LZO=m
CONFIG_CRYPTO_HW=y
CONFIG_ZCRYPT=m
# CONFIG_ZCRYPT_MONOLITHIC is not set
# CONFIG_CRYPTO_SHA1_S390 is not set
# CONFIG_CRYPTO_SHA256_S390 is not set
# CONFIG_CRYPTO_DES_S390 is not set
# CONFIG_CRYPTO_AES_S390 is not set
CONFIG_S390_PRNG=m
CONFIG_ZCRYPT=m
# CONFIG_ZCRYPT_MONOLITHIC is not set
#
# Library routines
@ -794,5 +833,7 @@ CONFIG_BITREVERSE=m
# CONFIG_CRC_ITU_T is not set
CONFIG_CRC32=m
CONFIG_CRC7=m
# CONFIG_LIBCRC32C is not set
CONFIG_LIBCRC32C=m
CONFIG_LZO_COMPRESS=m
CONFIG_LZO_DECOMPRESS=m
CONFIG_PLIST=y

11
arch/s390/kernel/binfmt_elf32.c
View File

@ -134,6 +134,7 @@ static inline int dump_task_fpu(struct task_struct *tsk, elf_fpregset_t *fpregs)
}
#include <asm/processor.h>
#include <asm/pgalloc.h>
#include <linux/module.h>
#include <linux/elfcore.h>
#include <linux/binfmts.h>
@ -183,6 +184,16 @@ struct elf_prpsinfo32
#undef start_thread
#define start_thread start_thread31
static inline void start_thread31(struct pt_regs *regs, unsigned long new_psw,
unsigned long new_stackp)
{
set_fs(USER_DS);
regs->psw.mask = psw_user32_bits;
regs->psw.addr = new_psw;
regs->gprs[15] = new_stackp;
crst_table_downgrade(current->mm, 1UL << 31);
}
MODULE_DESCRIPTION("Binary format loader for compatibility with 32bit Linux for S390 binaries,"
" Copyright 2000 IBM Corporation");
MODULE_AUTHOR("Gerhard Tonn <ton@de.ibm.com>");

20
arch/s390/kernel/compat_wrapper.S
View File

@ -1712,3 +1712,23 @@ sys_fallocate_wrapper:
sllg %r5,%r6,32 # get high word of 64bit loff_t
l %r5,164(%r15) # get low word of 64bit loff_t
jg sys_fallocate
.globl sys_timerfd_create_wrapper
sys_timerfd_create_wrapper:
lgfr %r2,%r2 # int
lgfr %r3,%r3 # int
jg sys_timerfd_create
.globl compat_sys_timerfd_settime_wrapper
compat_sys_timerfd_settime_wrapper:
lgfr %r2,%r2 # int
lgfr %r3,%r3 # int
llgtr %r4,%r4 # struct compat_itimerspec *
llgtr %r5,%r5 # struct compat_itimerspec *
jg compat_sys_timerfd_settime
.globl compat_sys_timerfd_gettime_wrapper
compat_sys_timerfd_gettime_wrapper:
lgfr %r2,%r2 # int
llgtr %r3,%r3 # struct compat_itimerspec *
jg compat_sys_timerfd_gettime

1
arch/s390/kernel/process.c
View File

@ -29,7 +29,6 @@
#include <linux/slab.h>
#include <linux/vmalloc.h>
#include <linux/user.h>
#include <linux/a.out.h>
#include <linux/interrupt.h>
#include <linux/delay.h>
#include <linux/reboot.h>

1
arch/s390/kernel/setup.c
View File

@ -24,7 +24,6 @@
#include <linux/ptrace.h>
#include <linux/slab.h>
#include <linux/user.h>
#include <linux/a.out.h>
#include <linux/tty.h>
#include <linux/ioport.h>
#include <linux/delay.h>

3
arch/s390/kernel/syscalls.S
View File

@ -327,3 +327,6 @@ SYSCALL(sys_utimensat,sys_utimensat,compat_sys_utimensat_wrapper) /* 315 */
SYSCALL(sys_signalfd,sys_signalfd,compat_sys_signalfd_wrapper)
NI_SYSCALL /* 317 old sys_timer_fd */
SYSCALL(sys_eventfd,sys_eventfd,sys_eventfd_wrapper)
SYSCALL(sys_timerfd_create,sys_timerfd_create,sys_timerfd_create_wrapper)
SYSCALL(sys_timerfd_settime,sys_timerfd_settime,compat_sys_timerfd_settime_wrapper) /* 320 */
SYSCALL(sys_timerfd_gettime,sys_timerfd_gettime,compat_sys_timerfd_gettime_wrapper)

3
arch/s390/kernel/traps.c
View File

@ -60,6 +60,7 @@ int sysctl_userprocess_debug = 0;
extern pgm_check_handler_t do_protection_exception;
extern pgm_check_handler_t do_dat_exception;
extern pgm_check_handler_t do_monitor_call;
extern pgm_check_handler_t do_asce_exception;
#define stack_pointer ({ void **sp; asm("la %0,0(15)" : "=&d" (sp)); sp; })
@ -730,7 +731,7 @@ void __init trap_init(void)
pgm_check_table[0x12] = &translation_exception;
pgm_check_table[0x13] = &special_op_exception;
#ifdef CONFIG_64BIT
pgm_check_table[0x38] = &do_dat_exception;
pgm_check_table[0x38] = &do_asce_exception;
pgm_check_table[0x39] = &do_dat_exception;
pgm_check_table[0x3A] = &do_dat_exception;
pgm_check_table[0x3B] = &do_dat_exception;

40
arch/s390/mm/fault.c
View File

@ -32,6 +32,7 @@
#include <asm/system.h>
#include <asm/pgtable.h>
#include <asm/s390_ext.h>
#include <asm/mmu_context.h>
#ifndef CONFIG_64BIT
#define __FAIL_ADDR_MASK 0x7ffff000
@ -444,6 +445,45 @@ void __kprobes do_dat_exception(struct pt_regs *regs, unsigned long error_code)
do_exception(regs, error_code & 0xff, 0);
}
#ifdef CONFIG_64BIT
void __kprobes do_asce_exception(struct pt_regs *regs, unsigned long error_code)
{
struct mm_struct *mm;
struct vm_area_struct *vma;
unsigned long address;
int space;
mm = current->mm;
address = S390_lowcore.trans_exc_code & __FAIL_ADDR_MASK;
space = check_space(current);
if (unlikely(space == 0 || in_atomic() || !mm))
goto no_context;
local_irq_enable();
down_read(&mm->mmap_sem);
vma = find_vma(mm, address);
up_read(&mm->mmap_sem);
if (vma) {
update_mm(mm, current);
return;
}
/* User mode accesses just cause a SIGSEGV */
if (regs->psw.mask & PSW_MASK_PSTATE) {
current->thread.prot_addr = address;
current->thread.trap_no = error_code;
do_sigsegv(regs, error_code, SEGV_MAPERR, address);
return;
}
no_context:
do_no_context(regs, error_code, address);
}
#endif
#ifdef CONFIG_PFAULT
/*
* 'pfault' pseudo page faults routines.

3
arch/s390/mm/init.c
View File

@ -112,6 +112,7 @@ void __init paging_init(void)
init_mm.pgd = swapper_pg_dir;
S390_lowcore.kernel_asce = __pa(init_mm.pgd) & PAGE_MASK;
#ifdef CONFIG_64BIT
/* A three level page table (4TB) is enough for the kernel space. */
S390_lowcore.kernel_asce |= _ASCE_TYPE_REGION3 | _ASCE_TABLE_LENGTH;
pgd_type = _REGION3_ENTRY_EMPTY;
#else
@ -184,7 +185,7 @@ void kernel_map_pages(struct page *page, int numpages, int enable)
pmd = pmd_offset(pud, address);
pte = pte_offset_kernel(pmd, address);
if (!enable) {
ptep_invalidate(address, pte);
ptep_invalidate(&init_mm, address, pte);
continue;
}
*pte = mk_pte_phys(address, __pgprot(_PAGE_TYPE_RW));

65
arch/s390/mm/mmap.c
View File

@ -27,6 +27,7 @@
#include <linux/personality.h>
#include <linux/mm.h>
#include <linux/module.h>
#include <asm/pgalloc.h>
/*
* Top of mmap area (just below the process stack).
@ -62,6 +63,8 @@ static inline int mmap_is_legacy(void)
current->signal->rlim[RLIMIT_STACK].rlim_cur == RLIM_INFINITY;
}
#ifndef CONFIG_64BIT
/*
* This function, called very early during the creation of a new
* process VM image, sets up which VM layout function to use:
@ -84,3 +87,65 @@ void arch_pick_mmap_layout(struct mm_struct *mm)
}
EXPORT_SYMBOL_GPL(arch_pick_mmap_layout);
#else
static unsigned long
s390_get_unmapped_area(struct file *filp, unsigned long addr,
unsigned long len, unsigned long pgoff, unsigned long flags)
{
struct mm_struct *mm = current->mm;
int rc;
addr = arch_get_unmapped_area(filp, addr, len, pgoff, flags);
if (addr & ~PAGE_MASK)
return addr;
if (unlikely(mm->context.asce_limit < addr + len)) {
rc = crst_table_upgrade(mm, addr + len);
if (rc)
return (unsigned long) rc;
}
return addr;
}
static unsigned long
s390_get_unmapped_area_topdown(struct file *filp, const unsigned long addr0,
const unsigned long len, const unsigned long pgoff,
const unsigned long flags)
{
struct mm_struct *mm = current->mm;
unsigned long addr = addr0;
int rc;
addr = arch_get_unmapped_area_topdown(filp, addr, len, pgoff, flags);
if (addr & ~PAGE_MASK)
return addr;
if (unlikely(mm->context.asce_limit < addr + len)) {
rc = crst_table_upgrade(mm, addr + len);
if (rc)
return (unsigned long) rc;
}
return addr;
}
/*
* This function, called very early during the creation of a new
* process VM image, sets up which VM layout function to use:
*/
void arch_pick_mmap_layout(struct mm_struct *mm)
{
/*
* Fall back to the standard layout if the personality
* bit is set, or if the expected stack growth is unlimited:
*/
if (mmap_is_legacy()) {
mm->mmap_base = TASK_UNMAPPED_BASE;
mm->get_unmapped_area = s390_get_unmapped_area;
mm->unmap_area = arch_unmap_area;
} else {
mm->mmap_base = mmap_base();
mm->get_unmapped_area = s390_get_unmapped_area_topdown;
mm->unmap_area = arch_unmap_area_topdown;
}
}
EXPORT_SYMBOL_GPL(arch_pick_mmap_layout);
#endif

182
arch/s390/mm/pgtable.c
View File

@ -23,11 +23,18 @@
#include <asm/pgalloc.h>
#include <asm/tlb.h>
#include <asm/tlbflush.h>
#include <asm/mmu_context.h>
#ifndef CONFIG_64BIT
#define ALLOC_ORDER 1
#define TABLES_PER_PAGE 4
#define FRAG_MASK 15UL
#define SECOND_HALVES 10UL
#else
#define ALLOC_ORDER 2
#define TABLES_PER_PAGE 2
#define FRAG_MASK 3UL
#define SECOND_HALVES 2UL
#endif
unsigned long *crst_table_alloc(struct mm_struct *mm, int noexec)
@ -45,52 +52,179 @@ unsigned long *crst_table_alloc(struct mm_struct *mm, int noexec)
}
page->index = page_to_phys(shadow);
}
spin_lock(&mm->page_table_lock);
list_add(&page->lru, &mm->context.crst_list);
spin_unlock(&mm->page_table_lock);
return (unsigned long *) page_to_phys(page);
}
void crst_table_free(unsigned long *table)
void crst_table_free(struct mm_struct *mm, unsigned long *table)
{
unsigned long *shadow = get_shadow_table(table);
struct page *page = virt_to_page(table);
spin_lock(&mm->page_table_lock);
list_del(&page->lru);
spin_unlock(&mm->page_table_lock);
if (shadow)
free_pages((unsigned long) shadow, ALLOC_ORDER);
free_pages((unsigned long) table, ALLOC_ORDER);
}
#ifdef CONFIG_64BIT
int crst_table_upgrade(struct mm_struct *mm, unsigned long limit)
{
unsigned long *table, *pgd;
unsigned long entry;
BUG_ON(limit > (1UL << 53));
repeat:
table = crst_table_alloc(mm, mm->context.noexec);
if (!table)
return -ENOMEM;
spin_lock(&mm->page_table_lock);
if (mm->context.asce_limit < limit) {
pgd = (unsigned long *) mm->pgd;
if (mm->context.asce_limit <= (1UL << 31)) {
entry = _REGION3_ENTRY_EMPTY;
mm->context.asce_limit = 1UL << 42;
mm->context.asce_bits = _ASCE_TABLE_LENGTH |
_ASCE_USER_BITS |
_ASCE_TYPE_REGION3;
} else {
entry = _REGION2_ENTRY_EMPTY;
mm->context.asce_limit = 1UL << 53;
mm->context.asce_bits = _ASCE_TABLE_LENGTH |
_ASCE_USER_BITS |
_ASCE_TYPE_REGION2;
}
crst_table_init(table, entry);
pgd_populate(mm, (pgd_t *) table, (pud_t *) pgd);
mm->pgd = (pgd_t *) table;
table = NULL;
}
spin_unlock(&mm->page_table_lock);
if (table)
crst_table_free(mm, table);
if (mm->context.asce_limit < limit)
goto repeat;
update_mm(mm, current);
return 0;
}
void crst_table_downgrade(struct mm_struct *mm, unsigned long limit)
{
pgd_t *pgd;
if (mm->context.asce_limit <= limit)
return;
__tlb_flush_mm(mm);
while (mm->context.asce_limit > limit) {
pgd = mm->pgd;
switch (pgd_val(*pgd) & _REGION_ENTRY_TYPE_MASK) {
case _REGION_ENTRY_TYPE_R2:
mm->context.asce_limit = 1UL << 42;
mm->context.asce_bits = _ASCE_TABLE_LENGTH |
_ASCE_USER_BITS |
_ASCE_TYPE_REGION3;
break;
case _REGION_ENTRY_TYPE_R3:
mm->context.asce_limit = 1UL << 31;
mm->context.asce_bits = _ASCE_TABLE_LENGTH |
_ASCE_USER_BITS |
_ASCE_TYPE_SEGMENT;
break;
default:
BUG();
}
mm->pgd = (pgd_t *) (pgd_val(*pgd) & _REGION_ENTRY_ORIGIN);
crst_table_free(mm, (unsigned long *) pgd);
}
update_mm(mm, current);
}
#endif
/*
* page table entry allocation/free routines.
*/
unsigned long *page_table_alloc(int noexec)
unsigned long *page_table_alloc(struct mm_struct *mm)
{
struct page *page = alloc_page(GFP_KERNEL);
struct page *page;
unsigned long *table;
unsigned long bits;
if (!page)
return NULL;
page->index = 0;
if (noexec) {
struct page *shadow = alloc_page(GFP_KERNEL);
if (!shadow) {
__free_page(page);
return NULL;
}
table = (unsigned long *) page_to_phys(shadow);
clear_table(table, _PAGE_TYPE_EMPTY, PAGE_SIZE);
page->index = (addr_t) table;
bits = mm->context.noexec ? 3UL : 1UL;
spin_lock(&mm->page_table_lock);
page = NULL;
if (!list_empty(&mm->context.pgtable_list)) {
page = list_first_entry(&mm->context.pgtable_list,
struct page, lru);
if ((page->flags & FRAG_MASK) == ((1UL << TABLES_PER_PAGE) - 1))
page = NULL;
}
if (!page) {
spin_unlock(&mm->page_table_lock);
page = alloc_page(GFP_KERNEL|__GFP_REPEAT);
if (!page)
return NULL;
pgtable_page_ctor(page);
page->flags &= ~FRAG_MASK;
table = (unsigned long *) page_to_phys(page);
clear_table(table, _PAGE_TYPE_EMPTY, PAGE_SIZE);
spin_lock(&mm->page_table_lock);
list_add(&page->lru, &mm->context.pgtable_list);
}
pgtable_page_ctor(page);
table = (unsigned long *) page_to_phys(page);
clear_table(table, _PAGE_TYPE_EMPTY, PAGE_SIZE);
while (page->flags & bits) {
table += 256;
bits <<= 1;
}
page->flags |= bits;
if ((page->flags & FRAG_MASK) == ((1UL << TABLES_PER_PAGE) - 1))
list_move_tail(&page->lru, &mm->context.pgtable_list);
spin_unlock(&mm->page_table_lock);
return table;
}
void page_table_free(unsigned long *table)
void page_table_free(struct mm_struct *mm, unsigned long *table)
{
unsigned long *shadow = get_shadow_pte(table);
pgtable_page_dtor(virt_to_page(table));
if (shadow)
free_page((unsigned long) shadow);
free_page((unsigned long) table);
struct page *page;
unsigned long bits;
bits = mm->context.noexec ? 3UL : 1UL;
bits <<= (__pa(table) & (PAGE_SIZE - 1)) / 256 / sizeof(unsigned long);
page = pfn_to_page(__pa(table) >> PAGE_SHIFT);
spin_lock(&mm->page_table_lock);
page->flags ^= bits;
if (page->flags & FRAG_MASK) {
/* Page now has some free pgtable fragments. */
list_move(&page->lru, &mm->context.pgtable_list);
page = NULL;
} else
/* All fragments of the 4K page have been freed. */
list_del(&page->lru);
spin_unlock(&mm->page_table_lock);
if (page) {
pgtable_page_dtor(page);
__free_page(page);
}
}
void disable_noexec(struct mm_struct *mm, struct task_struct *tsk)
{
struct page *page;
spin_lock(&mm->page_table_lock);
/* Free shadow region and segment tables. */
list_for_each_entry(page, &mm->context.crst_list, lru)
if (page->index) {
free_pages((unsigned long) page->index, ALLOC_ORDER);
page->index = 0;
}
/* "Free" second halves of page tables. */
list_for_each_entry(page, &mm->context.pgtable_list, lru)
page->flags &= ~SECOND_HALVES;
spin_unlock(&mm->page_table_lock);
mm->context.noexec = 0;
update_mm(mm, tsk);
}

28
arch/s390/mm/vmem.c
View File

@ -69,7 +69,19 @@ static void __ref *vmem_alloc_pages(unsigned int order)
return alloc_bootmem_pages((1 << order) * PAGE_SIZE);
}
#define vmem_pud_alloc() ({ BUG(); ((pud_t *) NULL); })
static inline pud_t *vmem_pud_alloc(void)
{
pud_t *pud = NULL;
#ifdef CONFIG_64BIT
pud = vmem_alloc_pages(2);
if (!pud)
return NULL;
pud_val(*pud) = _REGION3_ENTRY_EMPTY;
memcpy(pud + 1, pud, (PTRS_PER_PUD - 1)*sizeof(pud_t));
#endif
return pud;
}
static inline pmd_t *vmem_pmd_alloc(void)
{
@ -84,13 +96,18 @@ static inline pmd_t *vmem_pmd_alloc(void)
return pmd;
}
static inline pte_t *vmem_pte_alloc(void)
static pte_t __init_refok *vmem_pte_alloc(void)
{
pte_t *pte = vmem_alloc_pages(0);
pte_t *pte;
if (slab_is_available())
pte = (pte_t *) page_table_alloc(&init_mm);
else
pte = alloc_bootmem(PTRS_PER_PTE * sizeof(pte_t));
if (!pte)
return NULL;
clear_table((unsigned long *) pte, _PAGE_TYPE_EMPTY, PAGE_SIZE);
clear_table((unsigned long *) pte, _PAGE_TYPE_EMPTY,
PTRS_PER_PTE * sizeof(pte_t));
return pte;
}
@ -360,6 +377,9 @@ void __init vmem_map_init(void)
{
int i;
INIT_LIST_HEAD(&init_mm.context.crst_list);
INIT_LIST_HEAD(&init_mm.context.pgtable_list);
init_mm.context.noexec = 0;
NODE_DATA(0)->node_mem_map = VMEM_MAP;
for (i = 0; i < MEMORY_CHUNKS && memory_chunk[i].size > 0; i++)
vmem_add_mem(memory_chunk[i].addr, memory_chunk[i].size);

31
drivers/s390/char/sclp_vt220.c
View File

@ -3,7 +3,7 @@
* SCLP VT220 terminal driver.
*
* S390 version
* Copyright (C) 2003 IBM Deutschland Entwicklung GmbH, IBM Corporation
* Copyright IBM Corp. 2003,2008
* Author(s): Peter Oberparleiter <Peter.Oberparleiter@de.ibm.com>
*/
@ -632,6 +632,9 @@ static void __init __sclp_vt220_cleanup(void)
else
free_bootmem((unsigned long) page, PAGE_SIZE);
}
if (!list_empty(&sclp_vt220_register.list))
sclp_unregister(&sclp_vt220_register);
sclp_vt220_initialized = 0;
}
static int __init __sclp_vt220_init(void)
@ -639,6 +642,7 @@ static int __init __sclp_vt220_init(void)
void *page;
int i;
int num_pages;
int rc;
if (sclp_vt220_initialized)
return 0;
@ -667,7 +671,14 @@ static int __init __sclp_vt220_init(void)
}
list_add_tail((struct list_head *) page, &sclp_vt220_empty);
}
return 0;
rc = sclp_register(&sclp_vt220_register);
if (rc) {
printk(KERN_ERR SCLP_VT220_PRINT_HEADER
"could not register vt220 - "
"sclp_register returned %d\n", rc);
__sclp_vt220_cleanup();
}
return rc;
}
static const struct tty_operations sclp_vt220_ops = {
@ -688,22 +699,17 @@ static int __init sclp_vt220_tty_init(void)
{
struct tty_driver *driver;
int rc;
int cleanup;
/* Note: we're not testing for CONSOLE_IS_SCLP here to preserve
* symmetry between VM and LPAR systems regarding ttyS1. */
driver = alloc_tty_driver(1);
if (!driver)
return -ENOMEM;
cleanup = !sclp_vt220_initialized;
rc = __sclp_vt220_init();
if (rc)
goto out_driver;
rc = sclp_register(&sclp_vt220_register);
if (rc) {
printk(KERN_ERR SCLP_VT220_PRINT_HEADER
"could not register tty - "
"sclp_register returned %d\n", rc);
goto out_init;
}
driver->owner = THIS_MODULE;
driver->driver_name = SCLP_VT220_DRIVER_NAME;
@ -721,15 +727,14 @@ static int __init sclp_vt220_tty_init(void)
printk(KERN_ERR SCLP_VT220_PRINT_HEADER
"could not register tty - "
"tty_register_driver returned %d\n", rc);
goto out_sclp;
goto out_init;
}
sclp_vt220_driver = driver;
return 0;
out_sclp:
sclp_unregister(&sclp_vt220_register);
out_init:
__sclp_vt220_cleanup();
if (cleanup)
__sclp_vt220_cleanup();
out_driver:
put_tty_driver(driver);
return rc;

18
drivers/s390/cio/qdio.c
View File

@ -3189,13 +3189,11 @@ qdio_establish(struct qdio_initialize *init_data)
spin_lock_irqsave(get_ccwdev_lock(cdev),saveflags);
ccw_device_set_options_mask(cdev, 0);
result=ccw_device_start_timeout(cdev,&irq_ptr->ccw,
QDIO_DOING_ESTABLISH,0, 0,
QDIO_ESTABLISH_TIMEOUT);
result = ccw_device_start(cdev, &irq_ptr->ccw,
QDIO_DOING_ESTABLISH, 0, 0);
if (result) {
result2=ccw_device_start_timeout(cdev,&irq_ptr->ccw,
QDIO_DOING_ESTABLISH,0,0,
QDIO_ESTABLISH_TIMEOUT);
result2 = ccw_device_start(cdev, &irq_ptr->ccw,
QDIO_DOING_ESTABLISH, 0, 0);
sprintf(dbf_text,"eq:io%4x",result);
QDIO_DBF_TEXT2(1,setup,dbf_text);
if (result2) {
@ -3219,10 +3217,10 @@ qdio_establish(struct qdio_initialize *init_data)
return result;
}
/* Timeout is cared for already by using ccw_device_start_timeout(). */
wait_event_interruptible(cdev->private->wait_q,
irq_ptr->state == QDIO_IRQ_STATE_ESTABLISHED ||
irq_ptr->state == QDIO_IRQ_STATE_ERR);
wait_event_interruptible_timeout(cdev->private->wait_q,
irq_ptr->state == QDIO_IRQ_STATE_ESTABLISHED ||
irq_ptr->state == QDIO_IRQ_STATE_ERR,
QDIO_ESTABLISH_TIMEOUT);
if (irq_ptr->state == QDIO_IRQ_STATE_ESTABLISHED)
result = 0;

4
drivers/s390/crypto/ap_bus.c
View File

@ -61,9 +61,9 @@ module_param_named(domain, ap_domain_index, int, 0000);
MODULE_PARM_DESC(domain, "domain index for ap devices");
EXPORT_SYMBOL(ap_domain_index);
static int ap_thread_flag = 1;
static int ap_thread_flag = 0;
module_param_named(poll_thread, ap_thread_flag, int, 0000);
MODULE_PARM_DESC(poll_thread, "Turn on/off poll thread, default is 1 (on).");
MODULE_PARM_DESC(poll_thread, "Turn on/off poll thread, default is 0 (off).");
static struct device *ap_root_device = NULL;
static DEFINE_SPINLOCK(ap_device_lock);

32
include/asm-s390/a.out.h
View File

@ -1,32 +0,0 @@
/*
* include/asm-s390/a.out.h
*
* S390 version
* Copyright (C) 1999 IBM Deutschland Entwicklung GmbH, IBM Corporation
*
* Derived from "include/asm-i386/a.out.h"
* Copyright (C) 1992, Linus Torvalds
*
* I don't think we'll ever need a.out ...
*/
#ifndef __S390_A_OUT_H__
#define __S390_A_OUT_H__
struct exec
{
unsigned long a_info; /* Use macros N_MAGIC, etc for access */
unsigned a_text; /* length of text, in bytes */
unsigned a_data; /* length of data, in bytes */
unsigned a_bss; /* length of uninitialized data area for file, in bytes */
unsigned a_syms; /* length of symbol table data in file, in bytes */
unsigned a_entry; /* start address */
unsigned a_trsize; /* length of relocation info for text, in bytes */
unsigned a_drsize; /* length of relocation info for data, in bytes */
};
#define N_TRSIZE(a) ((a).a_trsize)
#define N_DRSIZE(a) ((a).a_drsize)
#define N_SYMSIZE(a) ((a).a_syms)
#endif /* __A_OUT_GNU_H__ */

4
include/asm-s390/bitops.h
View File

@ -472,7 +472,7 @@ static inline unsigned long __ffz_word_loop(const unsigned long *addr,
" brct %1,0b\n"
"1:\n"
#endif
: "+a" (bytes), "+d" (size)
: "+&a" (bytes), "+&d" (size)
: "d" (-1UL), "a" (addr), "m" (*(addrtype *) addr)
: "cc" );
return bytes;
@ -507,7 +507,7 @@ static inline unsigned long __ffs_word_loop(const unsigned long *addr,
" brct %1,0b\n"
"1:\n"
#endif
: "+a" (bytes), "+a" (size)
: "+&a" (bytes), "+&a" (size)
: "d" (0UL), "a" (addr), "m" (*(addrtype *) addr)
: "cc" );
return bytes;

22
include/asm-s390/elf.h
View File

@ -115,6 +115,7 @@ typedef s390_regs elf_gregset_t;
#include <linux/sched.h> /* for task_struct */
#include <asm/system.h> /* for save_access_regs */
#include <asm/mmu_context.h>
/*
* This is used to ensure we don't load something for the wrong architecture.
@ -137,14 +138,7 @@ typedef s390_regs elf_gregset_t;
use of this is to invoke "./ld.so someprog" to test out a new version of
the loader. We need to make sure that it is out of the way of the program
that it will "exec", and that there is sufficient room for the brk. */
#ifndef __s390x__
#define ELF_ET_DYN_BASE ((TASK_SIZE & 0x80000000) \
? TASK_SIZE / 3 * 2 \
: 2 * TASK_SIZE / 3)
#else /* __s390x__ */
#define ELF_ET_DYN_BASE (TASK_SIZE / 3 * 2)
#endif /* __s390x__ */
#define ELF_ET_DYN_BASE (STACK_TOP / 3 * 2)
/* Wow, the "main" arch needs arch dependent functions too.. :) */
@ -214,4 +208,16 @@ do { \
} while (0)
#endif /* __s390x__ */
/*
* An executable for which elf_read_implies_exec() returns TRUE will
* have the READ_IMPLIES_EXEC personality flag set automatically.
*/
#define elf_read_implies_exec(ex, executable_stack) \
({ \
if (current->mm->context.noexec && \
executable_stack != EXSTACK_DISABLE_X) \
disable_noexec(current->mm, current); \
current->mm->context.noexec == 0; \
})
#endif

9
include/asm-s390/mmu.h
View File

@ -1,7 +1,12 @@
#ifndef __MMU_H
#define __MMU_H
/* Default "unsigned long" context */
typedef unsigned long mm_context_t;
typedef struct {
struct list_head crst_list;
struct list_head pgtable_list;
unsigned long asce_bits;
unsigned long asce_limit;
int noexec;
} mm_context_t;
#endif

20
include/asm-s390/mmu_context.h
View File

@ -10,15 +10,19 @@
#define __S390_MMU_CONTEXT_H
#include <asm/pgalloc.h>
#include <asm/uaccess.h>
#include <asm-generic/mm_hooks.h>
static inline int init_new_context(struct task_struct *tsk,
struct mm_struct *mm)
{
mm->context = _ASCE_TABLE_LENGTH | _ASCE_USER_BITS;
mm->context.asce_bits = _ASCE_TABLE_LENGTH | _ASCE_USER_BITS;
#ifdef CONFIG_64BIT
mm->context |= _ASCE_TYPE_REGION3;
mm->context.asce_bits |= _ASCE_TYPE_REGION3;
#endif
mm->context.noexec = s390_noexec;
mm->context.asce_limit = STACK_TOP_MAX;
crst_table_init((unsigned long *) mm->pgd, pgd_entry_type(mm));
return 0;
}
@ -32,24 +36,25 @@ static inline int init_new_context(struct task_struct *tsk,
static inline void update_mm(struct mm_struct *mm, struct task_struct *tsk)
{
S390_lowcore.user_asce = mm->context | __pa(mm->pgd);
pgd_t *pgd = mm->pgd;
S390_lowcore.user_asce = mm->context.asce_bits | __pa(pgd);
if (switch_amode) {
/* Load primary space page table origin. */
pgd_t *shadow_pgd = get_shadow_table(mm->pgd) ? : mm->pgd;
S390_lowcore.user_exec_asce = mm->context | __pa(shadow_pgd);
pgd = mm->context.noexec ? get_shadow_table(pgd) : pgd;
S390_lowcore.user_exec_asce = mm->context.asce_bits | __pa(pgd);
asm volatile(LCTL_OPCODE" 1,1,%0\n"
: : "m" (S390_lowcore.user_exec_asce) );
} else
/* Load home space page table origin. */
asm volatile(LCTL_OPCODE" 13,13,%0"
: : "m" (S390_lowcore.user_asce) );
set_fs(current->thread.mm_segment);
}
static inline void switch_mm(struct mm_struct *prev, struct mm_struct *next,
struct task_struct *tsk)
{
if (unlikely(prev == next))
return;
cpu_set(smp_processor_id(), next->cpu_vm_mask);
update_mm(next, tsk);
}
@ -61,7 +66,6 @@ static inline void activate_mm(struct mm_struct *prev,
struct mm_struct *next)
{
switch_mm(prev, next, current);
set_fs(current->thread.mm_segment);
}
#endif /* __S390_MMU_CONTEXT_H */

36
include/asm-s390/page.h
View File

@ -74,43 +74,17 @@ static inline void copy_page(void *to, void *from)
typedef struct { unsigned long pgprot; } pgprot_t;
typedef struct { unsigned long pte; } pte_t;
#define pte_val(x) ((x).pte)
#define pgprot_val(x) ((x).pgprot)
#ifndef __s390x__
typedef struct { unsigned long pmd; } pmd_t;
typedef struct { unsigned long pud; } pud_t;
typedef struct {
unsigned long pgd0;
unsigned long pgd1;
unsigned long pgd2;
unsigned long pgd3;
} pgd_t;
#define pmd_val(x) ((x).pmd)
#define pud_val(x) ((x).pud)
#define pgd_val(x) ((x).pgd0)
#else /* __s390x__ */
typedef struct {
unsigned long pmd0;
unsigned long pmd1;
} pmd_t;
typedef struct { unsigned long pud; } pud_t;
typedef struct { unsigned long pgd; } pgd_t;
typedef pte_t *pgtable_t;
#define pmd_val(x) ((x).pmd0)
#define pmd_val1(x) ((x).pmd1)
#define pgprot_val(x) ((x).pgprot)
#define pte_val(x) ((x).pte)
#define pmd_val(x) ((x).pmd)
#define pud_val(x) ((x).pud)
#define pgd_val(x) ((x).pgd)
#endif /* __s390x__ */
typedef struct page *pgtable_t;
#define __pte(x) ((pte_t) { (x) } )
#define __pmd(x) ((pmd_t) { (x) } )
#define __pgd(x) ((pgd_t) { (x) } )
@ -167,7 +141,7 @@ static inline int pfn_valid(unsigned long pfn)
#define page_to_phys(page) (page_to_pfn(page) << PAGE_SHIFT)
#define virt_addr_valid(kaddr) pfn_valid(__pa(kaddr) >> PAGE_SHIFT)
#define VM_DATA_DEFAULT_FLAGS (VM_READ | VM_WRITE | VM_EXEC | \
#define VM_DATA_DEFAULT_FLAGS (VM_READ | VM_WRITE | \
VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC)
#include <asm-generic/memory_model.h>

114
include/asm-s390/pgalloc.h
View File

@ -20,10 +20,11 @@
#define check_pgt_cache() do {} while (0)
unsigned long *crst_table_alloc(struct mm_struct *, int);
void crst_table_free(unsigned long *);
void crst_table_free(struct mm_struct *, unsigned long *);
unsigned long *page_table_alloc(int);
void page_table_free(unsigned long *);
unsigned long *page_table_alloc(struct mm_struct *);
void page_table_free(struct mm_struct *, unsigned long *);
void disable_noexec(struct mm_struct *, struct task_struct *);
static inline void clear_table(unsigned long *s, unsigned long val, size_t n)
{
@ -72,23 +73,49 @@ static inline unsigned long pgd_entry_type(struct mm_struct *mm)
static inline unsigned long pgd_entry_type(struct mm_struct *mm)
{
return _REGION3_ENTRY_EMPTY;
if (mm->context.asce_limit <= (1UL << 31))
return _SEGMENT_ENTRY_EMPTY;
if (mm->context.asce_limit <= (1UL << 42))
return _REGION3_ENTRY_EMPTY;
return _REGION2_ENTRY_EMPTY;
}
#define pud_alloc_one(mm,address) ({ BUG(); ((pud_t *)2); })
#define pud_free(mm, x) do { } while (0)
int crst_table_upgrade(struct mm_struct *, unsigned long limit);
void crst_table_downgrade(struct mm_struct *, unsigned long limit);
static inline pud_t *pud_alloc_one(struct mm_struct *mm, unsigned long address)
{
unsigned long *table = crst_table_alloc(mm, mm->context.noexec);
if (table)
crst_table_init(table, _REGION3_ENTRY_EMPTY);
return (pud_t *) table;
}
#define pud_free(mm, pud) crst_table_free(mm, (unsigned long *) pud)
static inline pmd_t *pmd_alloc_one(struct mm_struct *mm, unsigned long vmaddr)
{
unsigned long *crst = crst_table_alloc(mm, s390_noexec);
if (crst)
crst_table_init(crst, _SEGMENT_ENTRY_EMPTY);
return (pmd_t *) crst;
unsigned long *table = crst_table_alloc(mm, mm->context.noexec);
if (table)
crst_table_init(table, _SEGMENT_ENTRY_EMPTY);
return (pmd_t *) table;
}
#define pmd_free(mm, pmd) crst_table_free((unsigned long *)pmd)
#define pmd_free(mm, pmd) crst_table_free(mm, (unsigned long *) pmd)
#define pgd_populate(mm, pgd, pud) BUG()
#define pgd_populate_kernel(mm, pgd, pud) BUG()
static inline void pgd_populate_kernel(struct mm_struct *mm,
pgd_t *pgd, pud_t *pud)
{
pgd_val(*pgd) = _REGION2_ENTRY | __pa(pud);
}
static inline void pgd_populate(struct mm_struct *mm, pgd_t *pgd, pud_t *pud)
{
pgd_populate_kernel(mm, pgd, pud);
if (mm->context.noexec) {
pgd = get_shadow_table(pgd);
pud = get_shadow_table(pud);
pgd_populate_kernel(mm, pgd, pud);
}
}
static inline void pud_populate_kernel(struct mm_struct *mm,
pud_t *pud, pmd_t *pmd)
@ -98,63 +125,50 @@ static inline void pud_populate_kernel(struct mm_struct *mm,
static inline void pud_populate(struct mm_struct *mm, pud_t *pud, pmd_t *pmd)
{
pud_t *shadow_pud = get_shadow_table(pud);
pmd_t *shadow_pmd = get_shadow_table(pmd);
if (shadow_pud && shadow_pmd)
pud_populate_kernel(mm, shadow_pud, shadow_pmd);
pud_populate_kernel(mm, pud, pmd);
if (mm->context.noexec) {
pud = get_shadow_table(pud);
pmd = get_shadow_table(pmd);
pud_populate_kernel(mm, pud, pmd);
}
}
#endif /* __s390x__ */
static inline pgd_t *pgd_alloc(struct mm_struct *mm)
{
unsigned long *crst = crst_table_alloc(mm, s390_noexec);
if (crst)
crst_table_init(crst, pgd_entry_type(mm));
return (pgd_t *) crst;
INIT_LIST_HEAD(&mm->context.crst_list);
INIT_LIST_HEAD(&mm->context.pgtable_list);
return (pgd_t *) crst_table_alloc(mm, s390_noexec);
}
#define pgd_free(mm, pgd) crst_table_free((unsigned long *) pgd)
#define pgd_free(mm, pgd) crst_table_free(mm, (unsigned long *) pgd)
static inline void
pmd_populate_kernel(struct mm_struct *mm, pmd_t *pmd, pte_t *pte)
static inline void pmd_populate_kernel(struct mm_struct *mm,
pmd_t *pmd, pte_t *pte)
{
#ifndef __s390x__
pmd_val(pmd[0]) = _SEGMENT_ENTRY + __pa(pte);
pmd_val(pmd[1]) = _SEGMENT_ENTRY + __pa(pte+256);
pmd_val(pmd[2]) = _SEGMENT_ENTRY + __pa(pte+512);
pmd_val(pmd[3]) = _SEGMENT_ENTRY + __pa(pte+768);
#else /* __s390x__ */
pmd_val(*pmd) = _SEGMENT_ENTRY + __pa(pte);
pmd_val1(*pmd) = _SEGMENT_ENTRY + __pa(pte+256);
#endif /* __s390x__ */
}
static inline void
pmd_populate(struct mm_struct *mm, pmd_t *pmd, pgtable_t page)
static inline void pmd_populate(struct mm_struct *mm,
pmd_t *pmd, pgtable_t pte)
{
pte_t *pte = (pte_t *)page_to_phys(page);
pmd_t *shadow_pmd = get_shadow_table(pmd);
pte_t *shadow_pte = get_shadow_pte(pte);
pmd_populate_kernel(mm, pmd, pte);
if (shadow_pmd && shadow_pte)
pmd_populate_kernel(mm, shadow_pmd, shadow_pte);
if (mm->context.noexec) {
pmd = get_shadow_table(pmd);
pmd_populate_kernel(mm, pmd, pte + PTRS_PER_PTE);
}
}
#define pmd_pgtable(pmd) pmd_page(pmd)
#define pmd_pgtable(pmd) \
(pgtable_t)(pmd_val(pmd) & -sizeof(pte_t)*PTRS_PER_PTE)
/*
* page table entry allocation/free routines.
*/
#define pte_alloc_one_kernel(mm, vmaddr) \
((pte_t *) page_table_alloc(s390_noexec))
#define pte_alloc_one(mm, vmaddr) \
virt_to_page(page_table_alloc(s390_noexec))
#define pte_alloc_one_kernel(mm, vmaddr) ((pte_t *) page_table_alloc(mm))
#define pte_alloc_one(mm, vmaddr) ((pte_t *) page_table_alloc(mm))
#define pte_free_kernel(mm, pte) \
page_table_free((unsigned long *) pte)
#define pte_free(mm, pte) \
page_table_free((unsigned long *) page_to_phys((struct page *) pte))
#define pte_free_kernel(mm, pte) page_table_free(mm, (unsigned long *) pte)
#define pte_free(mm, pte) page_table_free(mm, (unsigned long *) pte)
#endif /* _S390_PGALLOC_H */

195
include/asm-s390/pgtable.h
View File

@ -57,21 +57,21 @@ extern char empty_zero_page[PAGE_SIZE];
* PGDIR_SHIFT determines what a third-level page table entry can map
*/
#ifndef __s390x__
# define PMD_SHIFT 22
# define PUD_SHIFT 22
# define PGDIR_SHIFT 22
# define PMD_SHIFT 20
# define PUD_SHIFT 20
# define PGDIR_SHIFT 20
#else /* __s390x__ */
# define PMD_SHIFT 21
# define PMD_SHIFT 20
# define PUD_SHIFT 31
# define PGDIR_SHIFT 31
# define PGDIR_SHIFT 42
#endif /* __s390x__ */
#define PMD_SIZE (1UL << PMD_SHIFT)
#define PMD_MASK (~(PMD_SIZE-1))
#define PUD_SIZE (1UL << PUD_SHIFT)
#define PUD_MASK (~(PUD_SIZE-1))
#define PGDIR_SIZE (1UL << PGDIR_SHIFT)
#define PGDIR_MASK (~(PGDIR_SIZE-1))
#define PGDIR_SIZE (1UL << PGDIR_SHIFT)
#define PGDIR_MASK (~(PGDIR_SIZE-1))
/*
* entries per page directory level: the S390 is two-level, so
@ -79,17 +79,15 @@ extern char empty_zero_page[PAGE_SIZE];
* for S390 segment-table entries are combined to one PGD
* that leads to 1024 pte per pgd
*/
#define PTRS_PER_PTE 256
#ifndef __s390x__
# define PTRS_PER_PTE 1024
# define PTRS_PER_PMD 1
# define PTRS_PER_PUD 1
# define PTRS_PER_PGD 512
#define PTRS_PER_PMD 1
#define PTRS_PER_PUD 1
#else /* __s390x__ */
# define PTRS_PER_PTE 512
# define PTRS_PER_PMD 1024
# define PTRS_PER_PUD 1
# define PTRS_PER_PGD 2048
#define PTRS_PER_PMD 2048
#define PTRS_PER_PUD 2048
#endif /* __s390x__ */
#define PTRS_PER_PGD 2048
#define FIRST_USER_ADDRESS 0
@ -127,8 +125,9 @@ extern char empty_zero_page[PAGE_SIZE];
* mapping. This needs to be calculated at compile time since the size of the
* VMEM_MAP is static but the size of struct page can change.
*/
#define VMEM_MAX_PHYS min(VMALLOC_START, ((VMEM_MAP_END - VMALLOC_END) / \
sizeof(struct page) * PAGE_SIZE) & ~((16 << 20) - 1))
#define VMEM_MAX_PAGES ((VMEM_MAP_END - VMALLOC_END) / sizeof(struct page))
#define VMEM_MAX_PFN min(VMALLOC_START >> PAGE_SHIFT, VMEM_MAX_PAGES)
#define VMEM_MAX_PHYS ((VMEM_MAX_PFN << PAGE_SHIFT) & ~((16 << 20) - 1))
#define VMEM_MAP ((struct page *) VMALLOC_END)
/*
@ -375,24 +374,6 @@ extern char empty_zero_page[PAGE_SIZE];
# define PxD_SHADOW_SHIFT 2
#endif /* __s390x__ */
static inline struct page *get_shadow_page(struct page *page)
{
if (s390_noexec && page->index)
return virt_to_page((void *)(addr_t) page->index);
return NULL;
}
static inline void *get_shadow_pte(void *table)
{
unsigned long addr, offset;
struct page *page;
addr = (unsigned long) table;
offset = addr & (PAGE_SIZE - 1);
page = virt_to_page((void *)(addr ^ offset));
return (void *)(addr_t)(page->index ? (page->index | offset) : 0UL);
}
static inline void *get_shadow_table(void *table)
{
unsigned long addr, offset;
@ -410,17 +391,16 @@ static inline void *get_shadow_table(void *table)
* hook is made available.
*/
static inline void set_pte_at(struct mm_struct *mm, unsigned long addr,
pte_t *pteptr, pte_t pteval)
pte_t *ptep, pte_t entry)
{
pte_t *shadow_pte = get_shadow_pte(pteptr);
*pteptr = pteval;
if (shadow_pte) {
if (!(pte_val(pteval) & _PAGE_INVALID) &&
(pte_val(pteval) & _PAGE_SWX))
pte_val(*shadow_pte) = pte_val(pteval) | _PAGE_RO;
*ptep = entry;
if (mm->context.noexec) {
if (!(pte_val(entry) & _PAGE_INVALID) &&
(pte_val(entry) & _PAGE_SWX))
pte_val(entry) |= _PAGE_RO;
else
pte_val(*shadow_pte) = _PAGE_TYPE_EMPTY;
pte_val(entry) = _PAGE_TYPE_EMPTY;
ptep[PTRS_PER_PTE] = entry;
}
}
@ -439,24 +419,58 @@ static inline int pud_bad(pud_t pud) { return 0; }
#else /* __s390x__ */
static inline int pgd_present(pgd_t pgd) { return 1; }
static inline int pgd_none(pgd_t pgd) { return 0; }
static inline int pgd_bad(pgd_t pgd) { return 0; }
static inline int pgd_present(pgd_t pgd)
{
if ((pgd_val(pgd) & _REGION_ENTRY_TYPE_MASK) < _REGION_ENTRY_TYPE_R2)
return 1;
return (pgd_val(pgd) & _REGION_ENTRY_ORIGIN) != 0UL;
}
static inline int pgd_none(pgd_t pgd)
{
if ((pgd_val(pgd) & _REGION_ENTRY_TYPE_MASK) < _REGION_ENTRY_TYPE_R2)
return 0;
return (pgd_val(pgd) & _REGION_ENTRY_INV) != 0UL;
}
static inline int pgd_bad(pgd_t pgd)
{
/*
* With dynamic page table levels the pgd can be a region table
* entry or a segment table entry. Check for the bit that are
* invalid for either table entry.
*/
unsigned long mask =
~_SEGMENT_ENTRY_ORIGIN & ~_REGION_ENTRY_INV &
~_REGION_ENTRY_TYPE_MASK & ~_REGION_ENTRY_LENGTH;
return (pgd_val(pgd) & mask) != 0;
}
static inline int pud_present(pud_t pud)
{
if ((pud_val(pud) & _REGION_ENTRY_TYPE_MASK) < _REGION_ENTRY_TYPE_R3)
return 1;
return (pud_val(pud) & _REGION_ENTRY_ORIGIN) != 0UL;
}
static inline int pud_none(pud_t pud)
{
if ((pud_val(pud) & _REGION_ENTRY_TYPE_MASK) < _REGION_ENTRY_TYPE_R3)
return 0;
return (pud_val(pud) & _REGION_ENTRY_INV) != 0UL;
}
static inline int pud_bad(pud_t pud)
{
unsigned long mask = ~_REGION_ENTRY_ORIGIN & ~_REGION_ENTRY_INV;
return (pud_val(pud) & mask) != _REGION3_ENTRY;
/*
* With dynamic page table levels the pud can be a region table
* entry or a segment table entry. Check for the bit that are
* invalid for either table entry.
*/
unsigned long mask =
~_SEGMENT_ENTRY_ORIGIN & ~_REGION_ENTRY_INV &
~_REGION_ENTRY_TYPE_MASK & ~_REGION_ENTRY_LENGTH;
return (pud_val(pud) & mask) != 0;
}
#endif /* __s390x__ */
@ -535,24 +549,30 @@ static inline int pte_young(pte_t pte)
#define pgd_clear(pgd) do { } while (0)
#define pud_clear(pud) do { } while (0)
static inline void pmd_clear_kernel(pmd_t * pmdp)
{
pmd_val(pmdp[0]) = _SEGMENT_ENTRY_EMPTY;
pmd_val(pmdp[1]) = _SEGMENT_ENTRY_EMPTY;
pmd_val(pmdp[2]) = _SEGMENT_ENTRY_EMPTY;
pmd_val(pmdp[3]) = _SEGMENT_ENTRY_EMPTY;
}
#else /* __s390x__ */
#define pgd_clear(pgd) do { } while (0)
static inline void pgd_clear_kernel(pgd_t * pgd)
{
if ((pgd_val(*pgd) & _REGION_ENTRY_TYPE_MASK) == _REGION_ENTRY_TYPE_R2)
pgd_val(*pgd) = _REGION2_ENTRY_EMPTY;
}
static inline void pgd_clear(pgd_t * pgd)
{
pgd_t *shadow = get_shadow_table(pgd);
pgd_clear_kernel(pgd);
if (shadow)
pgd_clear_kernel(shadow);
}
static inline void pud_clear_kernel(pud_t *pud)
{
pud_val(*pud) = _REGION3_ENTRY_EMPTY;
if ((pud_val(*pud) & _REGION_ENTRY_TYPE_MASK) == _REGION_ENTRY_TYPE_R3)
pud_val(*pud) = _REGION3_ENTRY_EMPTY;
}
static inline void pud_clear(pud_t * pud)
static inline void pud_clear(pud_t *pud)
{
pud_t *shadow = get_shadow_table(pud);
@ -561,30 +581,27 @@ static inline void pud_clear(pud_t * pud)
pud_clear_kernel(shadow);
}
#endif /* __s390x__ */
static inline void pmd_clear_kernel(pmd_t * pmdp)
{
pmd_val(*pmdp) = _SEGMENT_ENTRY_EMPTY;
pmd_val1(*pmdp) = _SEGMENT_ENTRY_EMPTY;
}
#endif /* __s390x__ */
static inline void pmd_clear(pmd_t * pmdp)
static inline void pmd_clear(pmd_t *pmd)
{
pmd_t *shadow_pmd = get_shadow_table(pmdp);
pmd_t *shadow = get_shadow_table(pmd);
pmd_clear_kernel(pmdp);
if (shadow_pmd)
pmd_clear_kernel(shadow_pmd);
pmd_clear_kernel(pmd);
if (shadow)
pmd_clear_kernel(shadow);
}
static inline void pte_clear(struct mm_struct *mm, unsigned long addr, pte_t *ptep)
{
pte_t *shadow_pte = get_shadow_pte(ptep);
pte_val(*ptep) = _PAGE_TYPE_EMPTY;
if (shadow_pte)
pte_val(*shadow_pte) = _PAGE_TYPE_EMPTY;
if (mm->context.noexec)
pte_val(ptep[PTRS_PER_PTE]) = _PAGE_TYPE_EMPTY;
}
/*
@ -665,7 +682,7 @@ static inline void __ptep_ipte(unsigned long address, pte_t *ptep)
{
if (!(pte_val(*ptep) & _PAGE_INVALID)) {
#ifndef __s390x__
/* S390 has 1mb segments, we are emulating 4MB segments */
/* pto must point to the start of the segment table */
pte_t *pto = (pte_t *) (((unsigned long) ptep) & 0x7ffffc00);
#else
/* ipte in zarch mode can do the math */
@ -679,12 +696,12 @@ static inline void __ptep_ipte(unsigned long address, pte_t *ptep)
pte_val(*ptep) = _PAGE_TYPE_EMPTY;
}
static inline void ptep_invalidate(unsigned long address, pte_t *ptep)
static inline void ptep_invalidate(struct mm_struct *mm,
unsigned long address, pte_t *ptep)
{
__ptep_ipte(address, ptep);
ptep = get_shadow_pte(ptep);
if (ptep)
__ptep_ipte(address, ptep);
if (mm->context.noexec)
__ptep_ipte(address, ptep + PTRS_PER_PTE);
}
/*
@ -706,7 +723,7 @@ static inline void ptep_invalidate(unsigned long address, pte_t *ptep)
pte_t __pte = *(__ptep); \
if (atomic_read(&(__mm)->mm_users) > 1 || \
(__mm) != current->active_mm) \
ptep_invalidate(__address, __ptep); \
ptep_invalidate(__mm, __address, __ptep); \
else \
pte_clear((__mm), (__address), (__ptep)); \
__pte; \
@ -717,7 +734,7 @@ static inline pte_t ptep_clear_flush(struct vm_area_struct *vma,
unsigned long address, pte_t *ptep)
{
pte_t pte = *ptep;
ptep_invalidate(address, ptep);
ptep_invalidate(vma->vm_mm, address, ptep);
return pte;
}
@ -738,7 +755,7 @@ static inline pte_t ptep_get_and_clear_full(struct mm_struct *mm,
if (full)
pte_clear(mm, addr, ptep);
else
ptep_invalidate(addr, ptep);
ptep_invalidate(mm, addr, ptep);
return pte;
}
@ -749,7 +766,7 @@ static inline pte_t ptep_get_and_clear_full(struct mm_struct *mm,
if (pte_write(__pte)) { \
if (atomic_read(&(__mm)->mm_users) > 1 || \
(__mm) != current->active_mm) \
ptep_invalidate(__addr, __ptep); \
ptep_invalidate(__mm, __addr, __ptep); \
set_pte_at(__mm, __addr, __ptep, pte_wrprotect(__pte)); \
} \
})
@ -759,7 +776,7 @@ static inline pte_t ptep_get_and_clear_full(struct mm_struct *mm,
({ \
int __changed = !pte_same(*(__ptep), __entry); \
if (__changed) { \
ptep_invalidate(__addr, __ptep); \
ptep_invalidate((__vma)->vm_mm, __addr, __ptep); \
set_pte_at((__vma)->vm_mm, __addr, __ptep, __entry); \
} \
__changed; \
@ -840,13 +857,21 @@ static inline pte_t mk_pte(struct page *page, pgprot_t pgprot)
#define pmd_deref(pmd) (pmd_val(pmd) & _SEGMENT_ENTRY_ORIGIN)
#define pud_deref(pud) (pud_val(pud) & _REGION_ENTRY_ORIGIN)
#define pgd_deref(pgd) ({ BUG(); 0UL; })
#define pgd_deref(pgd) (pgd_val(pgd) & _REGION_ENTRY_ORIGIN)
#define pud_offset(pgd, address) ((pud_t *) pgd)
static inline pud_t *pud_offset(pgd_t *pgd, unsigned long address)
{
pud_t *pud = (pud_t *) pgd;
if ((pgd_val(*pgd) & _REGION_ENTRY_TYPE_MASK) == _REGION_ENTRY_TYPE_R2)
pud = (pud_t *) pgd_deref(*pgd);
return pud + pud_index(address);
}
static inline pmd_t *pmd_offset(pud_t *pud, unsigned long address)
{
pmd_t *pmd = (pmd_t *) pud_deref(*pud);
pmd_t *pmd = (pmd_t *) pud;
if ((pud_val(*pud) & _REGION_ENTRY_TYPE_MASK) == _REGION_ENTRY_TYPE_R3)
pmd = (pmd_t *) pud_deref(*pud);
return pmd + pmd_index(address);
}

45
include/asm-s390/processor.h
View File

@ -64,24 +64,29 @@ extern int get_cpu_capability(unsigned int *);
*/
#ifndef __s390x__
# define TASK_SIZE (0x80000000UL)
# define TASK_UNMAPPED_BASE (TASK_SIZE / 2)
# define DEFAULT_TASK_SIZE (0x80000000UL)
#define TASK_SIZE (1UL << 31)
#define TASK_UNMAPPED_BASE (1UL << 30)
#else /* __s390x__ */
# define TASK_SIZE_OF(tsk) (test_tsk_thread_flag(tsk, TIF_31BIT) ? \
(0x80000000UL) : (0x40000000000UL))
# define TASK_SIZE TASK_SIZE_OF(current)
# define TASK_UNMAPPED_BASE (TASK_SIZE / 2)
# define DEFAULT_TASK_SIZE (0x40000000000UL)
#define TASK_SIZE_OF(tsk) (test_tsk_thread_flag(tsk,TIF_31BIT) ? \
(1UL << 31) : (1UL << 53))
#define TASK_UNMAPPED_BASE (test_thread_flag(TIF_31BIT) ? \
(1UL << 30) : (1UL << 41))
#define TASK_SIZE TASK_SIZE_OF(current)
#endif /* __s390x__ */
#ifdef __KERNEL__
#define STACK_TOP TASK_SIZE
#define STACK_TOP_MAX DEFAULT_TASK_SIZE
#ifndef __s390x__
#define STACK_TOP (1UL << 31)
#define STACK_TOP_MAX (1UL << 31)
#else /* __s390x__ */
#define STACK_TOP (1UL << (test_thread_flag(TIF_31BIT) ? 31:42))
#define STACK_TOP_MAX (1UL << 42)
#endif /* __s390x__ */
#endif
@ -138,8 +143,6 @@ struct stack_frame {
/*
* Do necessary setup to start up a new thread.
*/
#ifndef __s390x__
#define start_thread(regs, new_psw, new_stackp) do { \
set_fs(USER_DS); \
regs->psw.mask = psw_user_bits; \
@ -147,24 +150,6 @@ struct stack_frame {
regs->gprs[15] = new_stackp ; \
} while (0)
#else /* __s390x__ */
#define start_thread(regs, new_psw, new_stackp) do { \
set_fs(USER_DS); \
regs->psw.mask = psw_user_bits; \
regs->psw.addr = new_psw; \
regs->gprs[15] = new_stackp; \
} while (0)
#define start_thread31(regs, new_psw, new_stackp) do { \
set_fs(USER_DS); \
regs->psw.mask = psw_user32_bits; \
regs->psw.addr = new_psw; \
regs->gprs[15] = new_stackp; \
} while (0)
#endif /* __s390x__ */
/* Forward declaration, a strange C thing */
struct task_struct;
struct mm_struct;

49
include/asm-s390/tlb.h
View File

@ -38,7 +38,7 @@ struct mmu_gather {
struct mm_struct *mm;
unsigned int fullmm;
unsigned int nr_ptes;
unsigned int nr_pmds;
unsigned int nr_pxds;
void *array[TLB_NR_PTRS];
};
@ -53,7 +53,7 @@ static inline struct mmu_gather *tlb_gather_mmu(struct mm_struct *mm,
tlb->fullmm = full_mm_flush || (num_online_cpus() == 1) ||
(atomic_read(&mm->mm_users) <= 1 && mm == current->active_mm);
tlb->nr_ptes = 0;
tlb->nr_pmds = TLB_NR_PTRS;
tlb->nr_pxds = TLB_NR_PTRS;
if (tlb->fullmm)
__tlb_flush_mm(mm);
return tlb;
@ -62,12 +62,13 @@ static inline struct mmu_gather *tlb_gather_mmu(struct mm_struct *mm,
static inline void tlb_flush_mmu(struct mmu_gather *tlb,
unsigned long start, unsigned long end)
{
if (!tlb->fullmm && (tlb->nr_ptes > 0 || tlb->nr_pmds < TLB_NR_PTRS))
if (!tlb->fullmm && (tlb->nr_ptes > 0 || tlb->nr_pxds < TLB_NR_PTRS))
__tlb_flush_mm(tlb->mm);
while (tlb->nr_ptes > 0)
pte_free(tlb->mm, tlb->array[--tlb->nr_ptes]);
while (tlb->nr_pmds < TLB_NR_PTRS)
pmd_free(tlb->mm, (pmd_t *) tlb->array[tlb->nr_pmds++]);
while (tlb->nr_pxds < TLB_NR_PTRS)
/* pgd_free frees the pointer as region or segment table */
pgd_free(tlb->mm, tlb->array[tlb->nr_pxds++]);
}
static inline void tlb_finish_mmu(struct mmu_gather *tlb,
@ -95,33 +96,57 @@ static inline void tlb_remove_page(struct mmu_gather *tlb, struct page *page)
* pte_free_tlb frees a pte table and clears the CRSTE for the
* page table from the tlb.
*/
static inline void pte_free_tlb(struct mmu_gather *tlb, pgtable_t page)
static inline void pte_free_tlb(struct mmu_gather *tlb, pgtable_t pte)
{
if (!tlb->fullmm) {
tlb->array[tlb->nr_ptes++] = page;
if (tlb->nr_ptes >= tlb->nr_pmds)
tlb->array[tlb->nr_ptes++] = pte;
if (tlb->nr_ptes >= tlb->nr_pxds)
tlb_flush_mmu(tlb, 0, 0);
} else
pte_free(tlb->mm, page);
pte_free(tlb->mm, pte);
}
/*
* pmd_free_tlb frees a pmd table and clears the CRSTE for the
* segment table entry from the tlb.
* If the mm uses a two level page table the single pmd is freed
* as the pgd. pmd_free_tlb checks the asce_limit against 2GB
* to avoid the double free of the pmd in this case.
*/
static inline void pmd_free_tlb(struct mmu_gather *tlb, pmd_t *pmd)
{
#ifdef __s390x__
if (tlb->mm->context.asce_limit <= (1UL << 31))
return;
if (!tlb->fullmm) {
tlb->array[--tlb->nr_pmds] = (struct page *) pmd;
if (tlb->nr_ptes >= tlb->nr_pmds)
tlb->array[--tlb->nr_pxds] = pmd;
if (tlb->nr_ptes >= tlb->nr_pxds)
tlb_flush_mmu(tlb, 0, 0);
} else
pmd_free(tlb->mm, pmd);
#endif
}
#define pud_free_tlb(tlb, pud) do { } while (0)
/*
* pud_free_tlb frees a pud table and clears the CRSTE for the
* region third table entry from the tlb.
* If the mm uses a three level page table the single pud is freed
* as the pgd. pud_free_tlb checks the asce_limit against 4TB
* to avoid the double free of the pud in this case.
*/
static inline void pud_free_tlb(struct mmu_gather *tlb, pud_t *pud)
{
#ifdef __s390x__
if (tlb->mm->context.asce_limit <= (1UL << 42))
return;
if (!tlb->fullmm) {
tlb->array[--tlb->nr_pxds] = pud;
if (tlb->nr_ptes >= tlb->nr_pxds)
tlb_flush_mmu(tlb, 0, 0);
} else
pud_free(tlb->mm, pud);
#endif
}
#define tlb_start_vma(tlb, vma) do { } while (0)
#define tlb_end_vma(tlb, vma) do { } while (0)

11
include/asm-s390/tlbflush.h
View File

@ -61,11 +61,12 @@ static inline void __tlb_flush_mm(struct mm_struct * mm)
* only ran on the local cpu.
*/
if (MACHINE_HAS_IDTE) {
pgd_t *shadow = get_shadow_table(mm->pgd);
if (shadow)
__tlb_flush_idte((unsigned long) shadow | mm->context);
__tlb_flush_idte((unsigned long) mm->pgd | mm->context);
if (mm->context.noexec)
__tlb_flush_idte((unsigned long)
get_shadow_table(mm->pgd) |
mm->context.asce_bits);
__tlb_flush_idte((unsigned long) mm->pgd |
mm->context.asce_bits);
return;
}
preempt_disable();

5
include/asm-s390/unistd.h
View File

@ -256,7 +256,10 @@
#define __NR_signalfd 316
#define __NR_timerfd 317
#define __NR_eventfd 318
#define NR_syscalls 319
#define __NR_timerfd_create 319
#define __NR_timerfd_settime 320
#define __NR_timerfd_gettime 321
#define NR_syscalls 322
/*
* There are some system calls that are not present on 64 bit, some