summaryrefslogtreecommitdiffstats
path: root/arch/s390/kernel/switch_cpu.S
diff options
context:
space:
mode:
authorLinus Torvalds <torvalds@linux-foundation.org>2012-03-23 02:15:32 +0100
committerLinus Torvalds <torvalds@linux-foundation.org>2012-03-23 02:15:32 +0100
commitdb1417967959569599da2a4bd0ffb93b17ad795f (patch)
tree08751414d5f4a9e264af924154ed3543a8e573a9 /arch/s390/kernel/switch_cpu.S
parentsecurity: optimize avc_audit() common path (diff)
parent[S390] kernel: Pass correct stack for smp_call_ipl_cpu() (diff)
downloadlinux-db1417967959569599da2a4bd0ffb93b17ad795f.tar.xz
linux-db1417967959569599da2a4bd0ffb93b17ad795f.zip
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux
Pull s390 patches from Martin Schwidefsky: "The biggest patch is the rework of the smp code, something I wanted to do for some time. There are some patches for our various dump methods and one new thing: z/VM LGR detection. LGR stands for linux-guest- relocation and is the guest migration feature of z/VM. For debugging purposes we keep a log of the systems where a specific guest has lived." Fix up trivial conflict in arch/s390/kernel/smp.c due to the scheduler cleanup having removed some code next to removed s390 code. * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux: [S390] kernel: Pass correct stack for smp_call_ipl_cpu() [S390] Ensure that vmcore_info pointer is never accessed directly [S390] dasd: prevent validate server for offline devices [S390] Remove monolithic build option for zcrypt driver. [S390] stack dump: fix indentation in output [S390] kernel: Add OS info memory interface [S390] Use block_sigmask() [S390] kernel: Add z/VM LGR detection [S390] irq: external interrupt code passing [S390] irq: set __ARCH_IRQ_EXIT_IRQS_DISABLED [S390] zfcpdump: Implement async sdias event processing [S390] Use copy_to_absolute_zero() instead of "stura/sturg" [S390] rework idle code [S390] rework smp code [S390] rename lowcore field [S390] Fix gcc 4.6.0 compile warning
Diffstat (limited to 'arch/s390/kernel/switch_cpu.S')
-rw-r--r--arch/s390/kernel/switch_cpu.S58
1 files changed, 0 insertions, 58 deletions
diff --git a/arch/s390/kernel/switch_cpu.S b/arch/s390/kernel/switch_cpu.S
deleted file mode 100644
index bfe070bc7659..000000000000
--- a/arch/s390/kernel/switch_cpu.S
+++ /dev/null
@@ -1,58 +0,0 @@
-/*
- * 31-bit switch cpu code
- *
- * Copyright IBM Corp. 2009
- *
- */
-
-#include <linux/linkage.h>
-#include <asm/asm-offsets.h>
-#include <asm/ptrace.h>
-
-# smp_switch_to_cpu switches to destination cpu and executes the passed function
-# Parameter: %r2 - function to call
-# %r3 - function parameter
-# %r4 - stack poiner
-# %r5 - current cpu
-# %r6 - destination cpu
-
- .section .text
-ENTRY(smp_switch_to_cpu)
- stm %r6,%r15,__SF_GPRS(%r15)
- lr %r1,%r15
- ahi %r15,-STACK_FRAME_OVERHEAD
- st %r1,__SF_BACKCHAIN(%r15)
- basr %r13,0
-0: la %r1,.gprregs_addr-0b(%r13)
- l %r1,0(%r1)
- stm %r0,%r15,0(%r1)
-1: sigp %r0,%r6,__SIGP_RESTART /* start destination CPU */
- brc 2,1b /* busy, try again */
-2: sigp %r0,%r5,__SIGP_STOP /* stop current CPU */
- brc 2,2b /* busy, try again */
-3: j 3b
-
-ENTRY(smp_restart_cpu)
- basr %r13,0
-0: la %r1,.gprregs_addr-0b(%r13)
- l %r1,0(%r1)
- lm %r0,%r15,0(%r1)
-1: sigp %r0,%r5,__SIGP_SENSE /* Wait for calling CPU */
- brc 10,1b /* busy, accepted (status 0), running */
- tmll %r0,0x40 /* Test if calling CPU is stopped */
- jz 1b
- ltr %r4,%r4 /* New stack ? */
- jz 1f
- lr %r15,%r4
-1: lr %r14,%r2 /* r14: Function to call */
- lr %r2,%r3 /* r2 : Parameter for function*/
- basr %r14,%r14 /* Call function */
-
-.gprregs_addr:
- .long .gprregs
-
- .section .data,"aw",@progbits
-.gprregs:
- .rept 16
- .long 0
- .endr