s390: remove 31 bit support
Remove the 31 bit support in order to reduce maintenance cost and
effectively remove dead code. Since a couple of years there is no
distribution left that comes with a 31 bit kernel.
The 31 bit kernel also has been broken since more than a year before
anybody noticed. In addition I added a removal warning to the kernel
shown at ipl for 5 minutes: a960062e5826 ("s390: add 31 bit warning
message") which let everybody know about the plan to remove 31 bit
code. We didn't get any response.
Given that the last 31 bit only machine was introduced in 1999 let's
remove the code.
Anybody with 31 bit user space code can still use the compat mode.
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
diff --git a/arch/s390/lib/uaccess.c b/arch/s390/lib/uaccess.c
index 53dd5d7..4614d41 100644
--- a/arch/s390/lib/uaccess.c
+++ b/arch/s390/lib/uaccess.c
@@ -15,20 +15,6 @@
#include <asm/mmu_context.h>
#include <asm/facility.h>
-#ifndef CONFIG_64BIT
-#define AHI "ahi"
-#define ALR "alr"
-#define CLR "clr"
-#define LHI "lhi"
-#define SLR "slr"
-#else
-#define AHI "aghi"
-#define ALR "algr"
-#define CLR "clgr"
-#define LHI "lghi"
-#define SLR "slgr"
-#endif
-
static struct static_key have_mvcos = STATIC_KEY_INIT_FALSE;
static inline unsigned long copy_from_user_mvcos(void *x, const void __user *ptr,
@@ -41,29 +27,29 @@
asm volatile(
"0: .insn ss,0xc80000000000,0(%0,%2),0(%1),0\n"
"9: jz 7f\n"
- "1:"ALR" %0,%3\n"
- " "SLR" %1,%3\n"
- " "SLR" %2,%3\n"
+ "1: algr %0,%3\n"
+ " slgr %1,%3\n"
+ " slgr %2,%3\n"
" j 0b\n"
"2: la %4,4095(%1)\n"/* %4 = ptr + 4095 */
" nr %4,%3\n" /* %4 = (ptr + 4095) & -4096 */
- " "SLR" %4,%1\n"
- " "CLR" %0,%4\n" /* copy crosses next page boundary? */
+ " slgr %4,%1\n"
+ " clgr %0,%4\n" /* copy crosses next page boundary? */
" jnh 4f\n"
"3: .insn ss,0xc80000000000,0(%4,%2),0(%1),0\n"
- "10:"SLR" %0,%4\n"
- " "ALR" %2,%4\n"
- "4:"LHI" %4,-1\n"
- " "ALR" %4,%0\n" /* copy remaining size, subtract 1 */
+ "10:slgr %0,%4\n"
+ " algr %2,%4\n"
+ "4: lghi %4,-1\n"
+ " algr %4,%0\n" /* copy remaining size, subtract 1 */
" bras %3,6f\n" /* memset loop */
" xc 0(1,%2),0(%2)\n"
"5: xc 0(256,%2),0(%2)\n"
" la %2,256(%2)\n"
- "6:"AHI" %4,-256\n"
+ "6: aghi %4,-256\n"
" jnm 5b\n"
" ex %4,0(%3)\n"
" j 8f\n"
- "7:"SLR" %0,%0\n"
+ "7:slgr %0,%0\n"
"8:\n"
EX_TABLE(0b,2b) EX_TABLE(3b,4b) EX_TABLE(9b,2b) EX_TABLE(10b,4b)
: "+a" (size), "+a" (ptr), "+a" (x), "+a" (tmp1), "=a" (tmp2)
@@ -82,32 +68,32 @@
" sacf 0\n"
"0: mvcp 0(%0,%2),0(%1),%3\n"
"10:jz 8f\n"
- "1:"ALR" %0,%3\n"
+ "1: algr %0,%3\n"
" la %1,256(%1)\n"
" la %2,256(%2)\n"
"2: mvcp 0(%0,%2),0(%1),%3\n"
"11:jnz 1b\n"
" j 8f\n"
"3: la %4,255(%1)\n" /* %4 = ptr + 255 */
- " "LHI" %3,-4096\n"
+ " lghi %3,-4096\n"
" nr %4,%3\n" /* %4 = (ptr + 255) & -4096 */
- " "SLR" %4,%1\n"
- " "CLR" %0,%4\n" /* copy crosses next page boundary? */
+ " slgr %4,%1\n"
+ " clgr %0,%4\n" /* copy crosses next page boundary? */
" jnh 5f\n"
"4: mvcp 0(%4,%2),0(%1),%3\n"
- "12:"SLR" %0,%4\n"
- " "ALR" %2,%4\n"
- "5:"LHI" %4,-1\n"
- " "ALR" %4,%0\n" /* copy remaining size, subtract 1 */
+ "12:slgr %0,%4\n"
+ " algr %2,%4\n"
+ "5: lghi %4,-1\n"
+ " algr %4,%0\n" /* copy remaining size, subtract 1 */
" bras %3,7f\n" /* memset loop */
" xc 0(1,%2),0(%2)\n"
"6: xc 0(256,%2),0(%2)\n"
" la %2,256(%2)\n"
- "7:"AHI" %4,-256\n"
+ "7: aghi %4,-256\n"
" jnm 6b\n"
" ex %4,0(%3)\n"
" j 9f\n"
- "8:"SLR" %0,%0\n"
+ "8:slgr %0,%0\n"
"9: sacf 768\n"
EX_TABLE(0b,3b) EX_TABLE(2b,3b) EX_TABLE(4b,5b)
EX_TABLE(10b,3b) EX_TABLE(11b,3b) EX_TABLE(12b,5b)
@@ -134,19 +120,19 @@
asm volatile(
"0: .insn ss,0xc80000000000,0(%0,%1),0(%2),0\n"
"6: jz 4f\n"
- "1:"ALR" %0,%3\n"
- " "SLR" %1,%3\n"
- " "SLR" %2,%3\n"
+ "1: algr %0,%3\n"
+ " slgr %1,%3\n"
+ " slgr %2,%3\n"
" j 0b\n"
"2: la %4,4095(%1)\n"/* %4 = ptr + 4095 */
" nr %4,%3\n" /* %4 = (ptr + 4095) & -4096 */
- " "SLR" %4,%1\n"
- " "CLR" %0,%4\n" /* copy crosses next page boundary? */
+ " slgr %4,%1\n"
+ " clgr %0,%4\n" /* copy crosses next page boundary? */
" jnh 5f\n"
"3: .insn ss,0xc80000000000,0(%4,%1),0(%2),0\n"
- "7:"SLR" %0,%4\n"
+ "7: slgr %0,%4\n"
" j 5f\n"
- "4:"SLR" %0,%0\n"
+ "4: slgr %0,%0\n"
"5:\n"
EX_TABLE(0b,2b) EX_TABLE(3b,5b) EX_TABLE(6b,2b) EX_TABLE(7b,5b)
: "+a" (size), "+a" (ptr), "+a" (x), "+a" (tmp1), "=a" (tmp2)
@@ -165,22 +151,22 @@
" sacf 0\n"
"0: mvcs 0(%0,%1),0(%2),%3\n"
"7: jz 5f\n"
- "1:"ALR" %0,%3\n"
+ "1: algr %0,%3\n"
" la %1,256(%1)\n"
" la %2,256(%2)\n"
"2: mvcs 0(%0,%1),0(%2),%3\n"
"8: jnz 1b\n"
" j 5f\n"
"3: la %4,255(%1)\n" /* %4 = ptr + 255 */
- " "LHI" %3,-4096\n"
+ " lghi %3,-4096\n"
" nr %4,%3\n" /* %4 = (ptr + 255) & -4096 */
- " "SLR" %4,%1\n"
- " "CLR" %0,%4\n" /* copy crosses next page boundary? */
+ " slgr %4,%1\n"
+ " clgr %0,%4\n" /* copy crosses next page boundary? */
" jnh 6f\n"
"4: mvcs 0(%4,%1),0(%2),%3\n"
- "9:"SLR" %0,%4\n"
+ "9: slgr %0,%4\n"
" j 6f\n"
- "5:"SLR" %0,%0\n"
+ "5: slgr %0,%0\n"
"6: sacf 768\n"
EX_TABLE(0b,3b) EX_TABLE(2b,3b) EX_TABLE(4b,6b)
EX_TABLE(7b,3b) EX_TABLE(8b,3b) EX_TABLE(9b,6b)
@@ -208,11 +194,11 @@
asm volatile(
"0: .insn ss,0xc80000000000,0(%0,%1),0(%2),0\n"
" jz 2f\n"
- "1:"ALR" %0,%3\n"
- " "SLR" %1,%3\n"
- " "SLR" %2,%3\n"
+ "1: algr %0,%3\n"
+ " slgr %1,%3\n"
+ " slgr %2,%3\n"
" j 0b\n"
- "2:"SLR" %0,%0\n"
+ "2:slgr %0,%0\n"
"3: \n"
EX_TABLE(0b,3b)
: "+a" (size), "+a" (to), "+a" (from), "+a" (tmp1), "=a" (tmp2)
@@ -228,23 +214,23 @@
load_kernel_asce();
asm volatile(
" sacf 256\n"
- " "AHI" %0,-1\n"
+ " aghi %0,-1\n"
" jo 5f\n"
" bras %3,3f\n"
- "0:"AHI" %0,257\n"
+ "0: aghi %0,257\n"
"1: mvc 0(1,%1),0(%2)\n"
" la %1,1(%1)\n"
" la %2,1(%2)\n"
- " "AHI" %0,-1\n"
+ " aghi %0,-1\n"
" jnz 1b\n"
" j 5f\n"
"2: mvc 0(256,%1),0(%2)\n"
" la %1,256(%1)\n"
" la %2,256(%2)\n"
- "3:"AHI" %0,-256\n"
+ "3: aghi %0,-256\n"
" jnm 2b\n"
"4: ex %0,1b-0b(%3)\n"
- "5: "SLR" %0,%0\n"
+ "5: slgr %0,%0\n"
"6: sacf 768\n"
EX_TABLE(1b,6b) EX_TABLE(2b,0b) EX_TABLE(4b,0b)
: "+a" (size), "+a" (to), "+a" (from), "=a" (tmp1)
@@ -269,18 +255,18 @@
asm volatile(
"0: .insn ss,0xc80000000000,0(%0,%1),0(%4),0\n"
" jz 4f\n"
- "1:"ALR" %0,%2\n"
- " "SLR" %1,%2\n"
+ "1: algr %0,%2\n"
+ " slgr %1,%2\n"
" j 0b\n"
"2: la %3,4095(%1)\n"/* %4 = to + 4095 */
" nr %3,%2\n" /* %4 = (to + 4095) & -4096 */
- " "SLR" %3,%1\n"
- " "CLR" %0,%3\n" /* copy crosses next page boundary? */
+ " slgr %3,%1\n"
+ " clgr %0,%3\n" /* copy crosses next page boundary? */
" jnh 5f\n"
"3: .insn ss,0xc80000000000,0(%3,%1),0(%4),0\n"
- " "SLR" %0,%3\n"
+ " slgr %0,%3\n"
" j 5f\n"
- "4:"SLR" %0,%0\n"
+ "4:slgr %0,%0\n"
"5:\n"
EX_TABLE(0b,2b) EX_TABLE(3b,5b)
: "+a" (size), "+a" (to), "+a" (tmp1), "=a" (tmp2)
@@ -295,28 +281,28 @@
load_kernel_asce();
asm volatile(
" sacf 256\n"
- " "AHI" %0,-1\n"
+ " aghi %0,-1\n"
" jo 5f\n"
" bras %3,3f\n"
" xc 0(1,%1),0(%1)\n"
- "0:"AHI" %0,257\n"
+ "0: aghi %0,257\n"
" la %2,255(%1)\n" /* %2 = ptr + 255 */
" srl %2,12\n"
" sll %2,12\n" /* %2 = (ptr + 255) & -4096 */
- " "SLR" %2,%1\n"
- " "CLR" %0,%2\n" /* clear crosses next page boundary? */
+ " slgr %2,%1\n"
+ " clgr %0,%2\n" /* clear crosses next page boundary? */
" jnh 5f\n"
- " "AHI" %2,-1\n"
+ " aghi %2,-1\n"
"1: ex %2,0(%3)\n"
- " "AHI" %2,1\n"
- " "SLR" %0,%2\n"
+ " aghi %2,1\n"
+ " slgr %0,%2\n"
" j 5f\n"
"2: xc 0(256,%1),0(%1)\n"
" la %1,256(%1)\n"
- "3:"AHI" %0,-256\n"
+ "3: aghi %0,-256\n"
" jnm 2b\n"
"4: ex %0,0(%3)\n"
- "5: "SLR" %0,%0\n"
+ "5: slgr %0,%0\n"
"6: sacf 768\n"
EX_TABLE(1b,6b) EX_TABLE(2b,0b) EX_TABLE(4b,0b)
: "+a" (size), "+a" (to), "=a" (tmp1), "=a" (tmp2)
@@ -341,12 +327,12 @@
asm volatile(
" la %2,0(%1)\n"
" la %3,0(%0,%1)\n"
- " "SLR" %0,%0\n"
+ " slgr %0,%0\n"
" sacf 256\n"
"0: srst %3,%2\n"
" jo 0b\n"
" la %0,1(%3)\n" /* strnlen_user results includes \0 */
- " "SLR" %0,%1\n"
+ " slgr %0,%1\n"
"1: sacf 768\n"
EX_TABLE(0b,1b)
: "+a" (size), "+a" (src), "=a" (tmp1), "=a" (tmp2)
@@ -399,7 +385,7 @@
static int __init uaccess_init(void)
{
- if (IS_ENABLED(CONFIG_64BIT) && !uaccess_primary && test_facility(27))
+ if (!uaccess_primary && test_facility(27))
static_key_slow_inc(&have_mvcos);
return 0;
}