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[PATCH] s390: default storage key

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Provide an easy way to define a non-zero storage key at compile time.  This is
useful for debugging purposes.

Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Peter Oberparleiter 2005-05-01 08:58:58 -07:00 committed by Linus Torvalds
parent c9e3735359
commit 0b642ede47
8 changed files with 41 additions and 16 deletions
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1
arch/s390/kernel/s390_ksyms.c
View File

@ -34,7 +34,6 @@ EXPORT_SYMBOL(__clear_user_asm);
EXPORT_SYMBOL(__strncpy_from_user_asm);
EXPORT_SYMBOL(__strnlen_user_asm);
EXPORT_SYMBOL(diag10);
EXPORT_SYMBOL(default_storage_key);
/*
* semaphore ops

20
arch/s390/kernel/setup.c
View File

@ -44,6 +44,8 @@
#include <asm/cpcmd.h>
#include <asm/lowcore.h>
#include <asm/irq.h>
#include <asm/page.h>
#include <asm/ptrace.h>
/*
* Machine setup..
@ -53,7 +55,6 @@ unsigned int console_devno = -1;
unsigned int console_irq = -1;
unsigned long memory_size = 0;
unsigned long machine_flags = 0;
unsigned int default_storage_key = 0;
struct {
unsigned long addr, size, type;
} memory_chunk[MEMORY_CHUNKS] = { { 0 } };
@ -402,7 +403,7 @@ setup_lowcore(void)
lc = (struct _lowcore *)
__alloc_bootmem(lc_pages * PAGE_SIZE, lc_pages * PAGE_SIZE, 0);
memset(lc, 0, lc_pages * PAGE_SIZE);
lc->restart_psw.mask = PSW_BASE_BITS;
lc->restart_psw.mask = PSW_BASE_BITS | PSW_DEFAULT_KEY;
lc->restart_psw.addr =
PSW_ADDR_AMODE | (unsigned long) restart_int_handler;
lc->external_new_psw.mask = PSW_KERNEL_BITS;
@ -470,7 +471,7 @@ static void __init
setup_memory(void)
{
unsigned long bootmap_size;
unsigned long start_pfn, end_pfn;
unsigned long start_pfn, end_pfn, init_pfn;
unsigned long last_rw_end;
int i;
@ -481,6 +482,10 @@ setup_memory(void)
start_pfn = (__pa(&_end) + PAGE_SIZE - 1) >> PAGE_SHIFT;
end_pfn = max_pfn = memory_end >> PAGE_SHIFT;
/* Initialize storage key for kernel pages */
for (init_pfn = 0 ; init_pfn < start_pfn; init_pfn++)
page_set_storage_key(init_pfn << PAGE_SHIFT, PAGE_DEFAULT_KEY);
/*
* Initialize the boot-time allocator (with low memory only):
*/
@ -491,7 +496,7 @@ setup_memory(void)
*/
last_rw_end = start_pfn;
for (i = 0; i < 16 && memory_chunk[i].size > 0; i++) {
for (i = 0; i < MEMORY_CHUNKS && memory_chunk[i].size > 0; i++) {
unsigned long start_chunk, end_chunk;
if (memory_chunk[i].type != CHUNK_READ_WRITE)
@ -505,6 +510,11 @@ setup_memory(void)
if (end_chunk > end_pfn)
end_chunk = end_pfn;
if (start_chunk < end_chunk) {
/* Initialize storage key for RAM pages */
for (init_pfn = start_chunk ; init_pfn < end_chunk;
init_pfn++)
page_set_storage_key(init_pfn << PAGE_SHIFT,
PAGE_DEFAULT_KEY);
free_bootmem(start_chunk << PAGE_SHIFT,
(end_chunk - start_chunk) << PAGE_SHIFT);
if (last_rw_end < start_chunk)
@ -513,6 +523,8 @@ setup_memory(void)
}
}
psw_set_key(PAGE_DEFAULT_KEY);
if (last_rw_end < end_pfn - 1)
add_memory_hole(last_rw_end, end_pfn - 1);

4
drivers/s390/cio/cio.c
View File

@ -1,7 +1,7 @@
/*
* drivers/s390/cio/cio.c
* S/390 common I/O routines -- low level i/o calls
* $Revision: 1.131 $
* $Revision: 1.133 $
*
* Copyright (C) 1999-2002 IBM Deutschland Entwicklung GmbH,
* IBM Corporation
@ -228,7 +228,7 @@ cio_start_key (struct subchannel *sch, /* subchannel structure */
int
cio_start (struct subchannel *sch, struct ccw1 *cpa, __u8 lpm)
{
return cio_start_key(sch, cpa, lpm, default_storage_key);
return cio_start_key(sch, cpa, lpm, PAGE_DEFAULT_KEY);
}
/*

6
drivers/s390/cio/device_ops.c
View File

@ -1,7 +1,7 @@
/*
* drivers/s390/cio/device_ops.c
*
* $Revision: 1.55 $
* $Revision: 1.56 $
*
* Copyright (C) 2002 IBM Deutschland Entwicklung GmbH,
* IBM Corporation
@ -128,7 +128,7 @@ ccw_device_start(struct ccw_device *cdev, struct ccw1 *cpa,
unsigned long intparm, __u8 lpm, unsigned long flags)
{
return ccw_device_start_key(cdev, cpa, intparm, lpm,
default_storage_key, flags);
PAGE_DEFAULT_KEY, flags);
}
int
@ -137,7 +137,7 @@ ccw_device_start_timeout(struct ccw_device *cdev, struct ccw1 *cpa,
int expires)
{
return ccw_device_start_timeout_key(cdev, cpa, intparm, lpm,
default_storage_key, flags,
PAGE_DEFAULT_KEY, flags,
expires);
}

6
drivers/s390/cio/qdio.h
View File

@ -1,7 +1,9 @@
#ifndef _CIO_QDIO_H
#define _CIO_QDIO_H
#define VERSION_CIO_QDIO_H "$Revision: 1.26 $"
#include <asm/page.h>
#define VERSION_CIO_QDIO_H "$Revision: 1.32 $"
#ifdef CONFIG_QDIO_DEBUG
#define QDIO_VERBOSE_LEVEL 9
@ -42,7 +44,7 @@
#define QDIO_Q_LAPS 5
#define QDIO_STORAGE_KEY 0
#define QDIO_STORAGE_KEY PAGE_DEFAULT_KEY
#define L2_CACHELINE_SIZE 256
#define INDICATORS_PER_CACHELINE (L2_CACHELINE_SIZE/sizeof(__u32))

2
include/asm-s390/page.h
View File

@ -16,6 +16,8 @@
#define PAGE_SHIFT 12
#define PAGE_SIZE (1UL << PAGE_SHIFT)
#define PAGE_MASK (~(PAGE_SIZE-1))
#define PAGE_DEFAULT_ACC 0
#define PAGE_DEFAULT_KEY (PAGE_DEFAULT_ACC << 4)
#ifdef __KERNEL__
#ifndef __ASSEMBLY__

2
include/asm-s390/processor.h
View File

@ -245,7 +245,7 @@ static inline void enabled_wait(void)
psw_t wait_psw;
wait_psw.mask = PSW_BASE_BITS | PSW_MASK_IO | PSW_MASK_EXT |
PSW_MASK_MCHECK | PSW_MASK_WAIT;
PSW_MASK_MCHECK | PSW_MASK_WAIT | PSW_DEFAULT_KEY;
#ifndef __s390x__
asm volatile (
" basr %0,0\n"

16
include/asm-s390/ptrace.h
View File

@ -185,6 +185,7 @@
#include <linux/stddef.h>
#include <linux/types.h>
#include <asm/setup.h>
#include <asm/page.h>
typedef union
{
@ -235,6 +236,7 @@ typedef struct
#define PSW_ADDR_INSN 0x7FFFFFFFUL
#define PSW_BASE_BITS 0x00080000UL
#define PSW_DEFAULT_KEY (((unsigned long) PAGE_DEFAULT_ACC) << 20)
#define PSW_ASC_PRIMARY 0x00000000UL
#define PSW_ASC_ACCREG 0x00004000UL
@ -260,6 +262,7 @@ typedef struct
#define PSW_BASE_BITS 0x0000000180000000UL
#define PSW_BASE32_BITS 0x0000000080000000UL
#define PSW_DEFAULT_KEY (((unsigned long) PAGE_DEFAULT_ACC) << 52)
#define PSW_ASC_PRIMARY 0x0000000000000000UL
#define PSW_ASC_ACCREG 0x0000400000000000UL
@ -268,14 +271,15 @@ typedef struct
#define PSW_USER32_BITS (PSW_BASE32_BITS | PSW_MASK_DAT | PSW_ASC_HOME | \
PSW_MASK_IO | PSW_MASK_EXT | PSW_MASK_MCHECK | \
PSW_MASK_PSTATE)
PSW_MASK_PSTATE | PSW_DEFAULT_KEY)
#endif /* __s390x__ */
#define PSW_KERNEL_BITS (PSW_BASE_BITS | PSW_MASK_DAT | PSW_ASC_PRIMARY)
#define PSW_KERNEL_BITS (PSW_BASE_BITS | PSW_MASK_DAT | PSW_ASC_PRIMARY | \
PSW_DEFAULT_KEY)
#define PSW_USER_BITS (PSW_BASE_BITS | PSW_MASK_DAT | PSW_ASC_HOME | \
PSW_MASK_IO | PSW_MASK_EXT | PSW_MASK_MCHECK | \
PSW_MASK_PSTATE)
PSW_MASK_PSTATE | PSW_DEFAULT_KEY)
/* This macro merges a NEW PSW mask specified by the user into
the currently active PSW mask CURRENT, modifying only those
@ -470,6 +474,12 @@ struct user_regs_struct
extern void show_regs(struct pt_regs * regs);
#endif
static inline void
psw_set_key(unsigned int key)
{
asm volatile ( "spka 0(%0)" : : "d" (key) );
}
#endif /* __ASSEMBLY__ */
#endif /* _S390_PTRACE_H */