From: Martin Schwidefsky <schwidefsky@de.ibm.com>
s390 core changes:
- Rework system call entry cleanup code to fix a potential asynchronous
interrupt stack overflow if the user stack pointer happens to be in
the same range as the asynchronous stack.
- Replace broken schedule_timeout call with msleep.
- Regenerate default configuration
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
---
25-akpm/arch/s390/defconfig | 12 +
25-akpm/arch/s390/kernel/entry.S | 269 ++++++++++++++--------------------
25-akpm/arch/s390/kernel/entry64.S | 253 ++++++++++++++-----------------
25-akpm/drivers/s390/cio/device_ops.c | 5
4 files changed, 242 insertions(+), 297 deletions(-)
diff -puN arch/s390/defconfig~s390-core-changes arch/s390/defconfig
--- 25/arch/s390/defconfig~s390-core-changes Tue Jul 27 14:12:52 2004
+++ 25-akpm/arch/s390/defconfig Tue Jul 27 14:12:52 2004
@@ -268,10 +268,12 @@ CONFIG_XFRM=y
# QoS and/or fair queueing
#
CONFIG_NET_SCHED=y
+CONFIG_NET_SCH_CLK_JIFFIES=y
+# CONFIG_NET_SCH_CLK_GETTIMEOFDAY is not set
+# CONFIG_NET_SCH_CLK_CPU is not set
CONFIG_NET_SCH_CBQ=m
# CONFIG_NET_SCH_HTB is not set
# CONFIG_NET_SCH_HFSC is not set
-CONFIG_NET_SCH_CSZ=m
CONFIG_NET_SCH_PRIO=m
CONFIG_NET_SCH_RED=m
CONFIG_NET_SCH_SFQ=m
@@ -279,7 +281,7 @@ CONFIG_NET_SCH_TEQL=m
CONFIG_NET_SCH_TBF=m
CONFIG_NET_SCH_GRED=m
CONFIG_NET_SCH_DSMARK=m
-# CONFIG_NET_SCH_DELAY is not set
+# CONFIG_NET_SCH_NETEM is not set
# CONFIG_NET_SCH_INGRESS is not set
CONFIG_NET_QOS=y
CONFIG_NET_ESTIMATOR=y
@@ -391,7 +393,8 @@ CONFIG_FS_MBCACHE=y
#
# DOS/FAT/NT Filesystems
#
-# CONFIG_FAT_FS is not set
+# CONFIG_MSDOS_FS is not set
+# CONFIG_VFAT_FS is not set
# CONFIG_NTFS_FS is not set
#
@@ -416,6 +419,7 @@ CONFIG_RAMFS=y
# CONFIG_BEFS_FS is not set
# CONFIG_BFS_FS is not set
# CONFIG_EFS_FS is not set
+# CONFIG_JFFS2_COMPRESSION_OPTIONS is not set
# CONFIG_CRAMFS is not set
# CONFIG_VXFS_FS is not set
# CONFIG_HPFS_FS is not set
@@ -520,6 +524,6 @@ CONFIG_CRYPTO=y
#
# Library routines
#
-# CONFIG_CRC16 is not set
+# CONFIG_CRC_CCITT is not set
# CONFIG_CRC32 is not set
# CONFIG_LIBCRC32C is not set
diff -puN arch/s390/kernel/entry64.S~s390-core-changes arch/s390/kernel/entry64.S
--- 25/arch/s390/kernel/entry64.S~s390-core-changes Tue Jul 27 14:12:52 2004
+++ 25-akpm/arch/s390/kernel/entry64.S Tue Jul 27 14:12:52 2004
@@ -52,6 +52,8 @@ _TIF_WORK_SVC = (_TIF_SIGPENDING | _TIF_
_TIF_RESTART_SVC | _TIF_SINGLE_STEP )
_TIF_WORK_INT = (_TIF_SIGPENDING | _TIF_NEED_RESCHED)
+#define BASED(name) name-system_call(%r13)
+
/*
* Register usage in interrupt handlers:
* R9 - pointer to current task structure
@@ -60,99 +62,52 @@ _TIF_WORK_INT = (_TIF_SIGPENDING | _TIF_
* R15 - kernel stack pointer
*/
+ .macro SAVE_ALL_BASE savearea
+ stmg %r12,%r15,\savearea
+ larl %r13,system_call
+ .endm
+
.macro SAVE_ALL psworg,savearea,sync
- stmg %r13,%r15,\savearea
+ la %r12,\psworg
.if \sync
- tm \psworg+1,0x01 # test problem state bit
- jz 1f # skip stack setup save
- lg %r15,__LC_KERNEL_STACK # problem state -> load ksp
+ tm \psworg+1,0x01 # test problem state bit
+ jz 2f # skip stack setup save
+ lg %r15,__LC_KERNEL_STACK # problem state -> load ksp
.else
- tm \psworg+1,0x01 # test problem state bit
- jnz 0f # from user -> load kernel stack
- lg %r14,__LC_ASYNC_STACK # are we already on the async. stack ?
+ tm \psworg+1,0x01 # test problem state bit
+ jnz 1f # from user -> load kernel stack
+ clc \psworg+8(8),BASED(.Lcritical_end)
+ jhe 0f
+ clc \psworg+8(8),BASED(.Lcritical_start)
+ jl 0f
+ brasl %r14,cleanup_critical
+ tm 0(%r12),0x01 # retest problem state after cleanup
+ jnz 1f
+0: lg %r14,__LC_ASYNC_STACK # are we already on the async. stack ?
slgr %r14,%r15
srag %r14,%r14,14
- jz 1f
-0: lg %r15,__LC_ASYNC_STACK # load async stack
+ jz 2f
+1: lg %r15,__LC_ASYNC_STACK # load async stack
.endif
-1: aghi %r15,-SP_SIZE # make room for registers & psw
- lghi %r14,\psworg
- slgr %r13,%r13
- icm %r14,12,__LC_SVC_ILC
- stmg %r0,%r12,SP_R0(%r15) # store gprs 0-13 to kernel stack
- stg %r2,SP_ORIG_R2(%r15) # store original content of gpr 2
- mvc SP_R13(24,%r15),\savearea # move r13, r14 and r15 to stack
- mvc SP_PSW(16,%r15),\psworg # move user PSW to stack
- st %r14,SP_ILC(%r15)
- stg %r13,0(%r15)
+2: aghi %r15,-SP_SIZE # make room for registers & psw
+ mvc SP_PSW(16,%r15),0(%r12) # move user PSW to stack
+ la %r12,\psworg
+ stg %r2,SP_ORIG_R2(%r15) # store original content of gpr 2
+ icm %r12,12,__LC_SVC_ILC
+ stmg %r0,%r11,SP_R0(%r15) # store gprs %r0-%r11 to kernel stack
+ st %r12,SP_ILC(%r15)
+ mvc SP_R12(32,%r15),\savearea # move %r12-%r15 to stack
+ la %r12,0
+ stg %r12,0(%r15)
.endm
- .macro CLEANUP_SAVE_ALL psworg,savearea,sync
- lg %r1,SP_PSW+8(%r15)
- cli 1(%r1),0xdf
- jne 2f
- mvc \savearea(24),SP_R13(%r15)
-2: lg %r1,\savearea+16
- .if \sync
- tm \psworg+1,0x01
- jz 1f
- lg %r1,__LC_KERNEL_STACK
- .else
- tm \psworg+1,0x01
- jnz 0f
- lg %r0,__LC_ASYNC_STACK
- slgr %r0,%r1
- srag %r0,%r0,14
- jz 1f
-0: lg %r1,__LC_ASYNC_STACK
+ .macro RESTORE_ALL sync
+ mvc __LC_RETURN_PSW(16),SP_PSW(%r15) # move user PSW to lowcore
+ .if !\sync
+ ni __LC_RETURN_PSW+1,0xfd # clear wait state bit
.endif
-1: aghi %r1,-SP_SIZE
- stg %r1,SP_R15(%r15)
- lghi %r0,\psworg
- xc SP_R13(8,%r15),SP_R13(%r15)
- icm %r0,12,__LC_SVC_ILC
- stg %r0,SP_R14(%r15)
- mvc SP_R0(104,%r1),SP_R0(%r15)
- mvc SP_ORIG_R2(8,%r1),SP_R2(%r15)
- mvc SP_R13(24,%r1),\savearea
- mvc SP_PSW(16,%r1),\psworg
- st %r0,SP_ILC(%r1)
- xc 0(8,%r1),0(%r1)
- .endm
-
- .macro RESTORE_ALL # system exit macro
- mvc __LC_RETURN_PSW(16),SP_PSW(%r15) # move user PSW to lowcore
- ni __LC_RETURN_PSW+1,0xfd # clear wait state bit
- lmg %r0,%r15,SP_R0(%r15) # load gprs 0-15 of user
- lpswe __LC_RETURN_PSW # back to caller
- .endm
-
- .macro CLEANUP_RESTORE_ALL
- lg %r1,SP_PSW+8(%r15)
- cli 0(%r1),0xb2
- jne 0f
- mvc SP_PSW(16,%r15),__LC_RETURN_PSW
- j 1f
-0: lg %r1,SP_R15(%r15)
- mvc SP_PSW(16,%r15),SP_PSW(%r1)
- mvc SP_R0(128,%r15),SP_R0(%r1)
-1:
- .endm
-
- .macro GET_THREAD_INFO
- lg %r9,__LC_THREAD_INFO # load pointer to thread_info struct
- .endm
-
- .macro CHECK_CRITICAL
- tm SP_PSW+1(%r15),0x01 # test problem state bit
- jnz 0f # from user -> not critical
- larl %r1,.Lcritical_start
- clc SP_PSW+8(8,%r15),8(%r1) # compare ip with __critical_end
- jnl 0f
- clc SP_PSW+8(8,%r15),0(%r1) # compare ip with __critical_start
- jl 0f
- brasl %r14,cleanup_critical
-0:
+ lmg %r0,%r15,SP_R0(%r15) # load gprs 0-15 of user
+ lpswe __LC_RETURN_PSW # back to caller
.endm
/*
@@ -211,16 +166,15 @@ __critical_start:
.globl system_call
system_call:
+ SAVE_ALL_BASE __LC_SAVE_AREA
SAVE_ALL __LC_SVC_OLD_PSW,__LC_SAVE_AREA,1
llgh %r7,__LC_SVC_INT_CODE # get svc number from lowcore
-sysc_enter:
- GET_THREAD_INFO # load pointer to task_struct to R9
sysc_do_svc:
+ lg %r9,__LC_THREAD_INFO # load pointer to thread_info struct
slag %r7,%r7,2 # *4 and test for svc 0
jnz sysc_nr_ok
# svc 0: system call number in %r1
- lghi %r0,NR_syscalls
- clr %r1,%r0
+ cl %r1,BASED(.Lnr_syscalls)
jnl sysc_nr_ok
lgfr %r7,%r1 # clear high word in r1
slag %r7,%r7,2 # svc 0: system call number in %r1
@@ -248,13 +202,12 @@ sysc_return:
tm __TI_flags+7(%r9),_TIF_WORK_SVC
jnz sysc_work # there is work to do (signals etc.)
sysc_leave:
- RESTORE_ALL
+ RESTORE_ALL 1
#
# recheck if there is more work to do
#
sysc_work_loop:
- GET_THREAD_INFO # load pointer to task_struct to R9
tm __TI_flags+7(%r9),_TIF_WORK_SVC
jz sysc_leave # there is no work to do
#
@@ -348,8 +301,9 @@ sysc_tracenogo:
# a new process exits the kernel with ret_from_fork
#
.globl ret_from_fork
-ret_from_fork:
- GET_THREAD_INFO # load pointer to task_struct to R9
+ret_from_fork:
+ lg %r13,__LC_SVC_NEW_PSW+8
+ lg %r9,__LC_THREAD_INFO # load pointer to thread_info struct
brasl %r14,schedule_tail
stosm 24(%r15),0x03 # reenable interrupts
j sysc_return
@@ -492,15 +446,16 @@ pgm_check_handler:
* we just ignore the PER event (FIXME: is there anything we have to do
* for LPSW?).
*/
+ SAVE_ALL_BASE __LC_SAVE_AREA
tm __LC_PGM_INT_CODE+1,0x80 # check whether we got a per exception
jnz pgm_per # got per exception -> special case
SAVE_ALL __LC_PGM_OLD_PSW,__LC_SAVE_AREA,1
+ lg %r9,__LC_THREAD_INFO # load pointer to thread_info struct
lgf %r3,__LC_PGM_ILC # load program interruption code
lghi %r8,0x7f
ngr %r8,%r3
pgm_do_call:
sll %r8,3
- GET_THREAD_INFO
larl %r1,pgm_check_table
lg %r1,0(%r8,%r1) # load address of handler routine
la %r2,SP_PTREGS(%r15) # address of register-save area
@@ -517,6 +472,7 @@ pgm_per:
clc __LC_PGM_OLD_PSW(16),__LC_SVC_NEW_PSW
je pgm_svcper
# no interesting special case, ignore PER event
+ lmg %r12,%r15,__LC_SAVE_AREA
lpswe __LC_PGM_OLD_PSW
#
@@ -524,7 +480,7 @@ pgm_per:
#
pgm_per_std:
SAVE_ALL __LC_PGM_OLD_PSW,__LC_SAVE_AREA,1
- GET_THREAD_INFO
+ lg %r9,__LC_THREAD_INFO # load pointer to thread_info struct
lg %r1,__TI_task(%r9)
mvc __THREAD_per+__PER_atmid(2,%r1),__LC_PER_ATMID
mvc __THREAD_per+__PER_address(8,%r1),__LC_PER_ADDRESS
@@ -542,7 +498,7 @@ pgm_per_std:
pgm_svcper:
SAVE_ALL __LC_SVC_OLD_PSW,__LC_SAVE_AREA,1
llgh %r7,__LC_SVC_INT_CODE # get svc number from lowcore
- GET_THREAD_INFO # load pointer to task_struct to R9
+ lg %r9,__LC_THREAD_INFO # load pointer to thread_info struct
lg %r1,__TI_task(%r9)
mvc __THREAD_per+__PER_atmid(2,%r1),__LC_PER_ATMID
mvc __THREAD_per+__PER_address(8,%r1),__LC_PER_ADDRESS
@@ -556,10 +512,10 @@ pgm_svcper:
*/
.globl io_int_handler
io_int_handler:
- SAVE_ALL __LC_IO_OLD_PSW,__LC_SAVE_AREA+32,0
stck __LC_INT_CLOCK
- CHECK_CRITICAL
- GET_THREAD_INFO # load pointer to task_struct to R9
+ SAVE_ALL_BASE __LC_SAVE_AREA+32
+ SAVE_ALL __LC_IO_OLD_PSW,__LC_SAVE_AREA+32,0
+ lg %r9,__LC_THREAD_INFO # load pointer to thread_info struct
la %r2,SP_PTREGS(%r15) # address of register-save area
brasl %r14,do_IRQ # call standard irq handler
@@ -573,7 +529,7 @@ io_return:
tm __TI_flags+7(%r9),_TIF_WORK_INT
jnz io_work # there is work to do (signals etc.)
io_leave:
- RESTORE_ALL
+ RESTORE_ALL 0
#ifdef CONFIG_PREEMPT
io_preempt:
@@ -593,7 +549,6 @@ io_resume_loop:
stosm 48(%r15),0x03 # reenable interrupts
brasl %r14,schedule # call schedule
stnsm 48(%r15),0xfc # disable I/O and ext. interrupts
- GET_THREAD_INFO # load pointer to task_struct to R9
xc __TI_precount(4,%r9),__TI_precount(%r9)
j io_resume_loop
#endif
@@ -625,7 +580,6 @@ io_reschedule:
stosm 48(%r15),0x03 # reenable interrupts
brasl %r14,schedule # call scheduler
stnsm 48(%r15),0xfc # disable I/O and ext. interrupts
- GET_THREAD_INFO # load pointer to task_struct to R9
tm __TI_flags+7(%r9),_TIF_WORK_INT
jz io_leave # there is no work to do
j io_work_loop
@@ -646,10 +600,10 @@ io_sigpending:
*/
.globl ext_int_handler
ext_int_handler:
- SAVE_ALL __LC_EXT_OLD_PSW,__LC_SAVE_AREA+32,0
- CHECK_CRITICAL
- GET_THREAD_INFO # load pointer to task_struct to R9
stck __LC_INT_CLOCK
+ SAVE_ALL_BASE __LC_SAVE_AREA+32
+ SAVE_ALL __LC_EXT_OLD_PSW,__LC_SAVE_AREA+32,0
+ lg %r9,__LC_THREAD_INFO # load pointer to thread_info struct
la %r2,SP_PTREGS(%r15) # address of register-save area
llgh %r3,__LC_EXT_INT_CODE # get interruption code
brasl %r14,do_extint
@@ -660,10 +614,11 @@ ext_int_handler:
*/
.globl mcck_int_handler
mcck_int_handler:
+ SAVE_ALL_BASE __LC_SAVE_AREA+64
SAVE_ALL __LC_MCK_OLD_PSW,__LC_SAVE_AREA+64,0
brasl %r14,s390_do_machine_check
mcck_return:
- RESTORE_ALL
+ RESTORE_ALL 0
#ifdef CONFIG_SMP
/*
@@ -694,46 +649,68 @@ restart_crash:
restart_go:
#endif
-cleanup_table:
- .quad system_call, sysc_enter, cleanup_sysc_enter
- .quad sysc_return, sysc_leave, cleanup_sysc_return
- .quad sysc_leave, sysc_work_loop, cleanup_sysc_leave
- .quad sysc_work_loop, sysc_reschedule, cleanup_sysc_return
-cleanup_table_entries=(.-cleanup_table) / 24
+cleanup_table_system_call:
+ .quad system_call, sysc_do_svc
+cleanup_table_sysc_return:
+ .quad sysc_return, sysc_leave
+cleanup_table_sysc_leave:
+ .quad sysc_leave, sysc_work_loop
+cleanup_table_sysc_work_loop:
+ .quad sysc_work_loop, sysc_reschedule
cleanup_critical:
- lghi %r0,cleanup_table_entries
- larl %r1,cleanup_table
- lg %r2,SP_PSW+8(%r15)
-cleanup_loop:
- clg %r2,0(%r1)
- jl cleanup_cont
- clg %r2,8(%r1)
- jl cleanup_found
-cleanup_cont:
- la %r1,24(%r1)
- brct %r0,cleanup_loop
+ clc 8(8,%r12),BASED(cleanup_table_system_call)
+ jl 0f
+ clc 8(8,%r12),BASED(cleanup_table_system_call+8)
+ jl cleanup_system_call
+0:
+ clc 8(8,%r12),BASED(cleanup_table_sysc_return)
+ jl 0f
+ clc 8(8,%r12),BASED(cleanup_table_sysc_return+8)
+ jl cleanup_sysc_return
+0:
+ clc 8(8,%r12),BASED(cleanup_table_sysc_leave)
+ jl 0f
+ clc 8(8,%r12),BASED(cleanup_table_sysc_leave+8)
+ jl cleanup_sysc_leave
+0:
+ clc 8(8,%r12),BASED(cleanup_table_sysc_work_loop)
+ jl 0f
+ clc 8(8,%r12),BASED(cleanup_table_sysc_work_loop+8)
+ jl cleanup_sysc_leave
+0:
br %r14
-cleanup_found:
- lg %r1,16(%r1)
- br %r1
-
-cleanup_sysc_enter:
- CLEANUP_SAVE_ALL __LC_SVC_OLD_PSW,__LC_SAVE_AREA,1
- llgh %r0,0x8a
- stg %r0,SP_R7(%r15)
- larl %r1,sysc_enter
- stg %r1,SP_PSW+8(%r15)
+
+cleanup_system_call:
+ mvc __LC_RETURN_PSW(8),0(%r12)
+ clc 8(8,%r12),BASED(cleanup_table_system_call)
+ jne 0f
+ mvc __LC_SAVE_AREA(32),__LC_SAVE_AREA+32
+0: stg %r13,__LC_SAVE_AREA+40
+ SAVE_ALL __LC_SVC_OLD_PSW,__LC_SAVE_AREA,1
+ stg %r15,__LC_SAVE_AREA+56
+ llgh %r7,__LC_SVC_INT_CODE
+ mvc __LC_RETURN_PSW+8(8),BASED(cleanup_table_system_call+8)
+ la %r12,__LC_RETURN_PSW
br %r14
cleanup_sysc_return:
- larl %r1,sysc_return
- stg %r1,SP_PSW+8(%r15)
+ mvc __LC_RETURN_PSW(8),0(%r12)
+ mvc __LC_RETURN_PSW+8(8),BASED(cleanup_table_sysc_return)
+ la %r12,__LC_RETURN_PSW
br %r14
cleanup_sysc_leave:
- CLEANUP_RESTORE_ALL
+ clc 8(8,%r12),BASED(cleanup_sysc_leave_lpsw)
+ je 0f
+ mvc __LC_RETURN_PSW(16),SP_PSW(%r15)
+ mvc __LC_SAVE_AREA+32(32),SP_R12(%r15)
+ lmg %r0,%r11,SP_R0(%r15)
+ lg %r15,SP_R15(%r15)
+0: la %r12,__LC_RETURN_PSW
br %r14
+cleanup_sysc_leave_lpsw:
+ .quad sysc_leave + 12
/*
* Integer constants
@@ -741,6 +718,12 @@ cleanup_sysc_leave:
.align 4
.Lconst:
.Lc_pactive: .long PREEMPT_ACTIVE
+.Lnr_syscalls: .long NR_syscalls
+.L0x0130: .short 0x130
+.L0x0140: .short 0x140
+.L0x0150: .short 0x150
+.L0x0160: .short 0x160
+.L0x0170: .short 0x170
.Lcritical_start:
.quad __critical_start
.Lcritical_end:
diff -puN arch/s390/kernel/entry.S~s390-core-changes arch/s390/kernel/entry.S
--- 25/arch/s390/kernel/entry.S~s390-core-changes Tue Jul 27 14:12:52 2004
+++ 25-akpm/arch/s390/kernel/entry.S Tue Jul 27 14:12:52 2004
@@ -62,107 +62,53 @@ _TIF_WORK_INT = (_TIF_SIGPENDING | _TIF_
* R15 - kernel stack pointer
*/
- .macro SAVE_ALL_BASE psworg,savearea,sync
- stm %r12,%r15,\savearea
- l %r13,__LC_SVC_NEW_PSW+4 # load &system_call to %r13
+ .macro SAVE_ALL_BASE savearea
+ stm %r12,%r15,\savearea
+ l %r13,__LC_SVC_NEW_PSW+4 # load &system_call to %r13
.endm
- .macro CLEANUP_SAVE_ALL_BASE psworg,savearea,sync
- l %r1,SP_PSW+4(%r15)
- cli 1(%r1),0xcf
- bne BASED(0f)
- mvc \savearea(16),SP_R12(%r15)
-0: st %r13,SP_R13(%r15)
- .endm
-
- .macro SAVE_ALL psworg,savearea,sync
+ .macro SAVE_ALL psworg,savearea,sync
+ la %r12,\psworg
.if \sync
- tm \psworg+1,0x01 # test problem state bit
- bz BASED(1f) # skip stack setup save
- l %r15,__LC_KERNEL_STACK # problem state -> load ksp
+ tm \psworg+1,0x01 # test problem state bit
+ bz BASED(2f) # skip stack setup save
+ l %r15,__LC_KERNEL_STACK # problem state -> load ksp
.else
- tm \psworg+1,0x01 # test problem state bit
- bnz BASED(0f) # from user -> load async stack
- l %r14,__LC_ASYNC_STACK # are we already on the async stack ?
- slr %r14,%r15
+ tm \psworg+1,0x01 # test problem state bit
+ bnz BASED(1f) # from user -> load async stack
+ clc \psworg+4(4),BASED(.Lcritical_end)
+ bhe BASED(0f)
+ clc \psworg+4(4),BASED(.Lcritical_start)
+ bl BASED(0f)
+ l %r14,BASED(.Lcleanup_critical)
+ basr %r14,%r14
+ tm 0(%r12),0x01 # retest problem state after cleanup
+ bnz BASED(1f)
+0: l %r14,__LC_ASYNC_STACK # are we already on the async stack ?
+ slr %r14,%r15
sra %r14,13
- be BASED(1f)
-0: l %r15,__LC_ASYNC_STACK
+ be BASED(2f)
+1: l %r15,__LC_ASYNC_STACK
.endif
-1: s %r15,BASED(.Lc_spsize) # make room for registers & psw
- l %r14,BASED(.L\psworg)
- slr %r12,%r12
- icm %r14,12,__LC_SVC_ILC
- stm %r0,%r11,SP_R0(%r15) # store gprs 0-12 to kernel stack
- st %r2,SP_ORIG_R2(%r15) # store original content of gpr 2
- mvc SP_R12(16,%r15),\savearea # move R13-R15 to stack
- mvc SP_PSW(8,%r15),\psworg # move user PSW to stack
- st %r14,SP_ILC(%r15)
- st %r12,0(%r15) # clear back chain
- .endm
-
- .macro CLEANUP_SAVE_ALL psworg,savearea,sync
- l %r1,\savearea+12
- .if \sync
- tm \psworg+1,0x01
- bz BASED(1f)
- l %r1,__LC_KERNEL_STACK
- .else
- tm \psworg+1,0x01
- bnz BASED(0f)
- l %r0,__LC_ASYNC_STACK
- slr %r0,%r1
- sra %r0,13
- bz BASED(1f)
-0: l %r1,__LC_ASYNC_STACK
- .endif
-1: s %r1,BASED(.Lc_spsize)
- st %r1,SP_R15(%r15)
- l %r0,BASED(.L\psworg)
- xc SP_R12(4,%r15),SP_R12(%r15)
- icm %r0,12,__LC_SVC_ILC
- st %r0,SP_R14(%r15)
- mvc SP_R0(48,%r1),SP_R0(%r15)
- mvc SP_ORIG_R2(4,%r1),SP_R2(%r15)
- mvc SP_R12(16,%r1),\savearea
- mvc SP_PSW(8,%r1),\psworg
- st %r0,SP_ILC(%r1)
- xc 0(4,%r1),0(%r1)
- .endm
-
- .macro RESTORE_ALL # system exit macro
- mvc __LC_RETURN_PSW(8),SP_PSW(%r15) # move user PSW to lowcore
- ni __LC_RETURN_PSW+1,0xfd # clear wait state bit
- lm %r0,%r15,SP_R0(%r15) # load gprs 0-15 of user
- lpsw __LC_RETURN_PSW # back to caller
- .endm
-
- .macro CLEANUP_RESTORE_ALL
- l %r1,SP_PSW+4(%r15)
- cli 0(%r1),0x82
- bne BASED(0f)
- mvc SP_PSW(8,%r15),__LC_RETURN_PSW
- b BASED(1f)
-0: l %r1,SP_R15(%r15)
- mvc SP_PSW(8,%r15),SP_PSW(%r1)
- mvc SP_R0(64,%r15),SP_R0(%r1)
-1:
+2: s %r15,BASED(.Lc_spsize) # make room for registers & psw
+ mvc SP_PSW(8,%r15),0(%r12) # move user PSW to stack
+ la %r12,\psworg
+ st %r2,SP_ORIG_R2(%r15) # store original content of gpr 2
+ icm %r12,12,__LC_SVC_ILC
+ stm %r0,%r11,SP_R0(%r15) # store gprs %r0-%r11 to kernel stack
+ st %r12,SP_ILC(%r15)
+ mvc SP_R12(16,%r15),\savearea # move %r12-%r15 to stack
+ la %r12,0
+ st %r12,0(%r15) # clear back chain
.endm
- .macro GET_THREAD_INFO
- l %r9,__LC_THREAD_INFO
- .endm
-
- .macro CHECK_CRITICAL
- tm SP_PSW+1(%r15),0x01 # test problem state bit
- bnz BASED(0f) # from user -> not critical
- clc SP_PSW+4(4,%r15),BASED(.Lcritical_end)
- bnl BASED(0f)
- clc SP_PSW+4(4,%r15),BASED(.Lcritical_start)
- bl BASED(0f)
- l %r1,BASED(.Lcleanup_critical)
- basr %r14,%r1
-0:
+ .macro RESTORE_ALL sync
+ mvc __LC_RETURN_PSW(8),SP_PSW(%r15) # move user PSW to lowcore
+ .if !\sync
+ ni __LC_RETURN_PSW+1,0xfd # clear wait state bit
+ .endif
+ lm %r0,%r15,SP_R0(%r15) # load gprs 0-15 of user
+ lpsw __LC_RETURN_PSW # back to caller
.endm
/*
@@ -226,12 +172,11 @@ __critical_start:
.globl system_call
system_call:
- SAVE_ALL_BASE __LC_SVC_OLD_PSW,__LC_SAVE_AREA,1
+ SAVE_ALL_BASE __LC_SAVE_AREA
SAVE_ALL __LC_SVC_OLD_PSW,__LC_SAVE_AREA,1
lh %r7,0x8a # get svc number from lowcore
-sysc_enter:
- GET_THREAD_INFO # load pointer to task_struct to R9
sysc_do_svc:
+ l %r9,__LC_THREAD_INFO # load pointer to thread_info struct
sla %r7,2 # *4 and test for svc 0
bnz BASED(sysc_nr_ok) # svc number > 0
# svc 0: system call number in %r1
@@ -256,13 +201,12 @@ sysc_return:
tm __TI_flags+3(%r9),_TIF_WORK_SVC
bnz BASED(sysc_work) # there is work to do (signals etc.)
sysc_leave:
- RESTORE_ALL
+ RESTORE_ALL 1
#
# recheck if there is more work to do
#
sysc_work_loop:
- GET_THREAD_INFO # load pointer to task_struct to R9
tm __TI_flags+3(%r9),_TIF_WORK_SVC
bz BASED(sysc_leave) # there is no work to do
#
@@ -359,7 +303,7 @@ sysc_tracenogo:
.globl ret_from_fork
ret_from_fork:
l %r13,__LC_SVC_NEW_PSW+4
- GET_THREAD_INFO # load pointer to task_struct to R9
+ l %r9,__LC_THREAD_INFO # load pointer to thread_info struct
l %r1,BASED(.Lschedtail)
basr %r14,%r1
stosm 24(%r15),0x03 # reenable interrupts
@@ -455,17 +399,17 @@ pgm_check_handler:
* we just ignore the PER event (FIXME: is there anything we have to do
* for LPSW?).
*/
- SAVE_ALL_BASE __LC_PGM_OLD_PSW,__LC_SAVE_AREA,1
+ SAVE_ALL_BASE __LC_SAVE_AREA
tm __LC_PGM_INT_CODE+1,0x80 # check whether we got a per exception
bnz BASED(pgm_per) # got per exception -> special case
SAVE_ALL __LC_PGM_OLD_PSW,__LC_SAVE_AREA,1
+ l %r9,__LC_THREAD_INFO # load pointer to thread_info struct
l %r3,__LC_PGM_ILC # load program interruption code
la %r8,0x7f
nr %r8,%r3
pgm_do_call:
l %r7,BASED(.Ljump_table)
sll %r8,2
- GET_THREAD_INFO
l %r7,0(%r8,%r7) # load address of handler routine
la %r2,SP_PTREGS(%r15) # address of register-save area
la %r14,BASED(sysc_return)
@@ -481,7 +425,7 @@ pgm_per:
clc __LC_PGM_OLD_PSW(8),__LC_SVC_NEW_PSW
be BASED(pgm_svcper)
# no interesting special case, ignore PER event
- lm %r13,%r15,__LC_SAVE_AREA
+ lm %r12,%r15,__LC_SAVE_AREA
lpsw 0x28
#
@@ -489,7 +433,7 @@ pgm_per:
#
pgm_per_std:
SAVE_ALL __LC_PGM_OLD_PSW,__LC_SAVE_AREA,1
- GET_THREAD_INFO
+ l %r9,__LC_THREAD_INFO # load pointer to thread_info struct
l %r1,__TI_task(%r9)
mvc __THREAD_per+__PER_atmid(2,%r1),__LC_PER_ATMID
mvc __THREAD_per+__PER_address(4,%r1),__LC_PER_ADDRESS
@@ -507,7 +451,7 @@ pgm_per_std:
pgm_svcper:
SAVE_ALL __LC_SVC_OLD_PSW,__LC_SAVE_AREA,1
lh %r7,0x8a # get svc number from lowcore
- GET_THREAD_INFO # load pointer to task_struct to R9
+ l %r9,__LC_THREAD_INFO # load pointer to thread_info struct
l %r1,__TI_task(%r9)
mvc __THREAD_per+__PER_atmid(2,%r1),__LC_PER_ATMID
mvc __THREAD_per+__PER_address(4,%r1),__LC_PER_ADDRESS
@@ -522,11 +466,10 @@ pgm_svcper:
.globl io_int_handler
io_int_handler:
- SAVE_ALL_BASE __LC_IO_OLD_PSW,__LC_SAVE_AREA+16,0
- SAVE_ALL __LC_IO_OLD_PSW,__LC_SAVE_AREA+16,0
stck __LC_INT_CLOCK
- CHECK_CRITICAL
- GET_THREAD_INFO # load pointer to task_struct to R9
+ SAVE_ALL_BASE __LC_SAVE_AREA+16
+ SAVE_ALL __LC_IO_OLD_PSW,__LC_SAVE_AREA+16,0
+ l %r9,__LC_THREAD_INFO # load pointer to thread_info struct
l %r1,BASED(.Ldo_IRQ) # load address of do_IRQ
la %r2,SP_PTREGS(%r15) # address of register-save area
basr %r14,%r1 # branch to standard irq handler
@@ -541,7 +484,7 @@ io_return:
tm __TI_flags+3(%r9),_TIF_WORK_INT
bnz BASED(io_work) # there is work to do (signals etc.)
io_leave:
- RESTORE_ALL
+ RESTORE_ALL 0
#ifdef CONFIG_PREEMPT
io_preempt:
@@ -560,7 +503,6 @@ io_resume_loop:
l %r1,BASED(.Lschedule)
basr %r14,%r1 # call schedule
stnsm 24(%r15),0xfc # disable I/O and ext. interrupts
- GET_THREAD_INFO # load pointer to task_struct to R9
xc __TI_precount(4,%r9),__TI_precount(%r9)
b BASED(io_resume_loop)
#endif
@@ -593,7 +535,6 @@ io_reschedule:
stosm 24(%r15),0x03 # reenable interrupts
basr %r14,%r1 # call scheduler
stnsm 24(%r15),0xfc # disable I/O and ext. interrupts
- GET_THREAD_INFO # load pointer to task_struct to R9
tm __TI_flags+3(%r9),_TIF_WORK_INT
bz BASED(io_leave) # there is no work to do
b BASED(io_work_loop)
@@ -616,11 +557,10 @@ io_sigpending:
.globl ext_int_handler
ext_int_handler:
- SAVE_ALL_BASE __LC_EXT_OLD_PSW,__LC_SAVE_AREA+16,0
- SAVE_ALL __LC_EXT_OLD_PSW,__LC_SAVE_AREA+16,0
stck __LC_INT_CLOCK
- CHECK_CRITICAL
- GET_THREAD_INFO # load pointer to task_struct to R9
+ SAVE_ALL_BASE __LC_SAVE_AREA+16
+ SAVE_ALL __LC_EXT_OLD_PSW,__LC_SAVE_AREA+16,0
+ l %r9,__LC_THREAD_INFO # load pointer to thread_info struct
la %r2,SP_PTREGS(%r15) # address of register-save area
lh %r3,__LC_EXT_INT_CODE # get interruption code
l %r1,BASED(.Ldo_extint)
@@ -633,12 +573,12 @@ ext_int_handler:
.globl mcck_int_handler
mcck_int_handler:
- SAVE_ALL_BASE __LC_MCK_OLD_PSW,__LC_SAVE_AREA+32,0
+ SAVE_ALL_BASE __LC_SAVE_AREA+32
SAVE_ALL __LC_MCK_OLD_PSW,__LC_SAVE_AREA+32,0
l %r1,BASED(.Ls390_mcck)
basr %r14,%r1 # call machine check handler
mcck_return:
- RESTORE_ALL
+ RESTORE_ALL 0
#ifdef CONFIG_SMP
/*
@@ -671,50 +611,68 @@ restart_crash:
restart_go:
#endif
-cleanup_table:
- .long system_call, sysc_enter, cleanup_sysc_enter
- .long sysc_return, sysc_leave, cleanup_sysc_return
- .long sysc_leave, sysc_work_loop, cleanup_sysc_leave
- .long sysc_work_loop, sysc_reschedule, cleanup_sysc_return
-cleanup_table_entries=(.-cleanup_table) / 12
+cleanup_table_system_call:
+ .long system_call + 0x80000000, sysc_do_svc + 0x80000000
+cleanup_table_sysc_return:
+ .long sysc_return + 0x80000000, sysc_leave + 0x80000000
+cleanup_table_sysc_leave:
+ .long sysc_leave + 0x80000000, sysc_work_loop + 0x80000000
+cleanup_table_sysc_work_loop:
+ .long sysc_work_loop + 0x80000000, sysc_reschedule + 0x80000000
cleanup_critical:
- lhi %r0,cleanup_table_entries
- la %r1,BASED(cleanup_table)
- l %r2,SP_PSW+4(%r15)
- la %r2,0(%r2)
-cleanup_loop:
- cl %r2,0(%r1)
- bl BASED(cleanup_cont)
- cl %r2,4(%r1)
- bl BASED(cleanup_found)
-cleanup_cont:
- la %r1,12(%r1)
- bct %r0,BASED(cleanup_loop)
+ clc 4(4,%r12),BASED(cleanup_table_system_call)
+ bl BASED(0f)
+ clc 4(4,%r12),BASED(cleanup_table_system_call+4)
+ bl BASED(cleanup_system_call)
+0:
+ clc 4(4,%r12),BASED(cleanup_table_sysc_return)
+ bl BASED(0f)
+ clc 4(4,%r12),BASED(cleanup_table_sysc_return+4)
+ bl BASED(cleanup_sysc_return)
+0:
+ clc 4(4,%r12),BASED(cleanup_table_sysc_leave)
+ bl BASED(0f)
+ clc 4(4,%r12),BASED(cleanup_table_sysc_leave+4)
+ bl BASED(cleanup_sysc_leave)
+0:
+ clc 4(4,%r12),BASED(cleanup_table_sysc_work_loop)
+ bl BASED(0f)
+ clc 4(4,%r12),BASED(cleanup_table_sysc_work_loop+4)
+ bl BASED(cleanup_sysc_leave)
+0:
br %r14
-cleanup_found:
- l %r1,8(%r1)
- br %r1
-cleanup_sysc_enter:
- CLEANUP_SAVE_ALL_BASE __LC_SVC_OLD_PSW,__LC_SAVE_AREA,1
- CLEANUP_SAVE_ALL __LC_SVC_OLD_PSW,__LC_SAVE_AREA,1
- lh %r0,0x8a
- st %r0,SP_R7(%r15)
- la %r1,BASED(sysc_enter)
- o %r1,BASED(.Lamode)
- st %r1,SP_PSW+4(%r15)
+cleanup_system_call:
+ mvc __LC_RETURN_PSW(4),0(%r12)
+ clc 4(4,%r12),BASED(cleanup_table_system_call)
+ bne BASED(0f)
+ mvc __LC_SAVE_AREA(16),__LC_SAVE_AREA+16
+0: st %r13,__LC_SAVE_AREA+20
+ SAVE_ALL __LC_SVC_OLD_PSW,__LC_SAVE_AREA,1
+ st %r15,__LC_SAVE_AREA+28
+ lh %r7,0x8a
+ mvc __LC_RETURN_PSW+4(4),BASED(cleanup_table_system_call+4)
+ la %r12,__LC_RETURN_PSW
br %r14
cleanup_sysc_return:
- la %r1,BASED(sysc_return)
- o %r1,BASED(.Lamode)
- st %r1,SP_PSW+4(%r15)
+ mvc __LC_RETURN_PSW(4),0(%r12)
+ mvc __LC_RETURN_PSW+4(4),BASED(cleanup_table_sysc_return)
+ la %r12,__LC_RETURN_PSW
br %r14
cleanup_sysc_leave:
- CLEANUP_RESTORE_ALL
+ clc 4(4,%r12),BASED(cleanup_sysc_leave_lpsw)
+ be BASED(0f)
+ mvc __LC_RETURN_PSW(8),SP_PSW(%r15)
+ mvc __LC_SAVE_AREA+16(16),SP_R12(%r15)
+ lm %r0,%r11,SP_R0(%r15)
+ l %r15,SP_R15(%r15)
+0: la %r12,__LC_RETURN_PSW
br %r14
+cleanup_sysc_leave_lpsw:
+ .long sysc_leave + 10 + 0x80000000
/*
* Integer constants
@@ -724,12 +682,11 @@ cleanup_sysc_leave:
.Lc_overhead: .long STACK_FRAME_OVERHEAD
.Lc_pactive: .long PREEMPT_ACTIVE
.Lnr_syscalls: .long NR_syscalls
-.L0x018: .long 0x018
-.L0x020: .long 0x020
-.L0x028: .long 0x028
-.L0x030: .long 0x030
-.L0x038: .long 0x038
-.Lamode: .long 0x80000000
+.L0x018: .short 0x018
+.L0x020: .short 0x020
+.L0x028: .short 0x028
+.L0x030: .short 0x030
+.L0x038: .short 0x038
/*
* Symbol constants
diff -puN drivers/s390/cio/device_ops.c~s390-core-changes drivers/s390/cio/device_ops.c
--- 25/drivers/s390/cio/device_ops.c~s390-core-changes Tue Jul 27 14:12:52 2004
+++ 25-akpm/drivers/s390/cio/device_ops.c Tue Jul 27 14:12:52 2004
@@ -1,7 +1,7 @@
/*
* drivers/s390/cio/device_ops.c
*
- * $Revision: 1.47 $
+ * $Revision: 1.49 $
*
* Copyright (C) 2002 IBM Deutschland Entwicklung GmbH,
* IBM Corporation
@@ -15,6 +15,7 @@
#include <linux/slab.h>
#include <linux/list.h>
#include <linux/device.h>
+#include <linux/delay.h>
#include <asm/ccwdev.h>
#include <asm/idals.h>
@@ -268,7 +269,7 @@ __ccw_device_retry_loop(struct ccw_devic
if ((ret == -EBUSY) || (ret == -EACCES)) {
/* Try again later. */
spin_unlock_irq(&sch->lock);
- schedule_timeout(1);
+ msleep(10);
spin_lock_irq(&sch->lock);
continue;
}
_