14bfc86ceSHeiko Carstens/* 24bfc86ceSHeiko Carstens * S390 low-level entry points. 34bfc86ceSHeiko Carstens * 44bfc86ceSHeiko Carstens * Copyright IBM Corp. 1999, 2012 54bfc86ceSHeiko Carstens * Author(s): Martin Schwidefsky (schwidefsky@de.ibm.com), 64bfc86ceSHeiko Carstens * Hartmut Penner (hp@de.ibm.com), 74bfc86ceSHeiko Carstens * Denis Joseph Barrow (djbarrow@de.ibm.com,barrow_dj@yahoo.com), 84bfc86ceSHeiko Carstens * Heiko Carstens <heiko.carstens@de.ibm.com> 94bfc86ceSHeiko Carstens */ 104bfc86ceSHeiko Carstens 114bfc86ceSHeiko Carstens#include <linux/init.h> 124bfc86ceSHeiko Carstens#include <linux/linkage.h> 134bfc86ceSHeiko Carstens#include <asm/processor.h> 144bfc86ceSHeiko Carstens#include <asm/cache.h> 154bfc86ceSHeiko Carstens#include <asm/errno.h> 164bfc86ceSHeiko Carstens#include <asm/ptrace.h> 174bfc86ceSHeiko Carstens#include <asm/thread_info.h> 184bfc86ceSHeiko Carstens#include <asm/asm-offsets.h> 194bfc86ceSHeiko Carstens#include <asm/unistd.h> 204bfc86ceSHeiko Carstens#include <asm/page.h> 214bfc86ceSHeiko Carstens#include <asm/sigp.h> 224bfc86ceSHeiko Carstens#include <asm/irq.h> 239977e886SHendrik Brueckner#include <asm/vx-insn.h> 2483abeffbSHendrik Brueckner#include <asm/setup.h> 2583abeffbSHendrik Brueckner#include <asm/nmi.h> 26711f5df7SAl Viro#include <asm/export.h> 274bfc86ceSHeiko Carstens 284bfc86ceSHeiko Carstens__PT_R0 = __PT_GPRS 294bfc86ceSHeiko Carstens__PT_R1 = __PT_GPRS + 8 304bfc86ceSHeiko Carstens__PT_R2 = __PT_GPRS + 16 314bfc86ceSHeiko Carstens__PT_R3 = __PT_GPRS + 24 324bfc86ceSHeiko Carstens__PT_R4 = __PT_GPRS + 32 334bfc86ceSHeiko Carstens__PT_R5 = __PT_GPRS + 40 344bfc86ceSHeiko Carstens__PT_R6 = __PT_GPRS + 48 354bfc86ceSHeiko Carstens__PT_R7 = __PT_GPRS + 56 364bfc86ceSHeiko Carstens__PT_R8 = __PT_GPRS + 64 374bfc86ceSHeiko Carstens__PT_R9 = __PT_GPRS + 72 384bfc86ceSHeiko Carstens__PT_R10 = __PT_GPRS + 80 394bfc86ceSHeiko Carstens__PT_R11 = __PT_GPRS + 88 404bfc86ceSHeiko Carstens__PT_R12 = __PT_GPRS + 96 414bfc86ceSHeiko Carstens__PT_R13 = __PT_GPRS + 104 424bfc86ceSHeiko Carstens__PT_R14 = __PT_GPRS + 112 434bfc86ceSHeiko Carstens__PT_R15 = __PT_GPRS + 120 444bfc86ceSHeiko Carstens 453a890380SHeiko CarstensSTACK_SHIFT = PAGE_SHIFT + THREAD_SIZE_ORDER 464bfc86ceSHeiko CarstensSTACK_SIZE = 1 << STACK_SHIFT 474bfc86ceSHeiko CarstensSTACK_INIT = STACK_SIZE - STACK_FRAME_OVERHEAD - __PT_SIZE 484bfc86ceSHeiko Carstens 494bfc86ceSHeiko Carstens_TIF_WORK = (_TIF_SIGPENDING | _TIF_NOTIFY_RESUME | _TIF_NEED_RESCHED | \ 5076f1948aSLinus Torvalds _TIF_UPROBE | _TIF_GUARDED_STORAGE | _TIF_PATCH_PENDING) 514bfc86ceSHeiko Carstens_TIF_TRACE = (_TIF_SYSCALL_TRACE | _TIF_SYSCALL_AUDIT | _TIF_SECCOMP | \ 524bfc86ceSHeiko Carstens _TIF_SYSCALL_TRACEPOINT) 53b5a882fcSHeiko Carstens_CIF_WORK = (_CIF_MCCK_PENDING | _CIF_ASCE_PRIMARY | \ 54b5a882fcSHeiko Carstens _CIF_ASCE_SECONDARY | _CIF_FPU) 554bfc86ceSHeiko Carstens_PIF_WORK = (_PIF_PER_TRAP) 564bfc86ceSHeiko Carstens 579977e886SHendrik Brueckner#define BASED(name) name-cleanup_critical(%r13) 584bfc86ceSHeiko Carstens 594bfc86ceSHeiko Carstens .macro TRACE_IRQS_ON 604bfc86ceSHeiko Carstens#ifdef CONFIG_TRACE_IRQFLAGS 614bfc86ceSHeiko Carstens basr %r2,%r0 624bfc86ceSHeiko Carstens brasl %r14,trace_hardirqs_on_caller 634bfc86ceSHeiko Carstens#endif 644bfc86ceSHeiko Carstens .endm 654bfc86ceSHeiko Carstens 664bfc86ceSHeiko Carstens .macro TRACE_IRQS_OFF 674bfc86ceSHeiko Carstens#ifdef CONFIG_TRACE_IRQFLAGS 684bfc86ceSHeiko Carstens basr %r2,%r0 694bfc86ceSHeiko Carstens brasl %r14,trace_hardirqs_off_caller 704bfc86ceSHeiko Carstens#endif 714bfc86ceSHeiko Carstens .endm 724bfc86ceSHeiko Carstens 734bfc86ceSHeiko Carstens .macro LOCKDEP_SYS_EXIT 744bfc86ceSHeiko Carstens#ifdef CONFIG_LOCKDEP 754bfc86ceSHeiko Carstens tm __PT_PSW+1(%r11),0x01 # returning to user ? 764bfc86ceSHeiko Carstens jz .+10 774bfc86ceSHeiko Carstens brasl %r14,lockdep_sys_exit 784bfc86ceSHeiko Carstens#endif 794bfc86ceSHeiko Carstens .endm 804bfc86ceSHeiko Carstens 814bfc86ceSHeiko Carstens .macro CHECK_STACK stacksize,savearea 824bfc86ceSHeiko Carstens#ifdef CONFIG_CHECK_STACK 834bfc86ceSHeiko Carstens tml %r15,\stacksize - CONFIG_STACK_GUARD 844bfc86ceSHeiko Carstens lghi %r14,\savearea 854bfc86ceSHeiko Carstens jz stack_overflow 864bfc86ceSHeiko Carstens#endif 874bfc86ceSHeiko Carstens .endm 884bfc86ceSHeiko Carstens 892acb94f4SMartin Schwidefsky .macro SWITCH_ASYNC savearea,timer 904bfc86ceSHeiko Carstens tmhh %r8,0x0001 # interrupting from user ? 914bfc86ceSHeiko Carstens jnz 1f 924bfc86ceSHeiko Carstens lgr %r14,%r9 934bfc86ceSHeiko Carstens slg %r14,BASED(.Lcritical_start) 944bfc86ceSHeiko Carstens clg %r14,BASED(.Lcritical_length) 954bfc86ceSHeiko Carstens jhe 0f 964bfc86ceSHeiko Carstens lghi %r11,\savearea # inside critical section, do cleanup 974bfc86ceSHeiko Carstens brasl %r14,cleanup_critical 984bfc86ceSHeiko Carstens tmhh %r8,0x0001 # retest problem state after cleanup 994bfc86ceSHeiko Carstens jnz 1f 1002acb94f4SMartin Schwidefsky0: lg %r14,__LC_ASYNC_STACK # are we already on the async stack? 1014bfc86ceSHeiko Carstens slgr %r14,%r15 1022acb94f4SMartin Schwidefsky srag %r14,%r14,STACK_SHIFT 103a359bb11SMartin Schwidefsky jnz 2f 1042acb94f4SMartin Schwidefsky CHECK_STACK 1<<STACK_SHIFT,\savearea 1054bfc86ceSHeiko Carstens aghi %r15,-(STACK_FRAME_OVERHEAD + __PT_SIZE) 106a359bb11SMartin Schwidefsky j 3f 10734525e1fSMartin Schwidefsky1: UPDATE_VTIME %r14,%r15,\timer 1082acb94f4SMartin Schwidefsky2: lg %r15,__LC_ASYNC_STACK # load async stack 109a359bb11SMartin Schwidefsky3: la %r11,STACK_FRAME_OVERHEAD(%r15) 1104bfc86ceSHeiko Carstens .endm 1114bfc86ceSHeiko Carstens 112a359bb11SMartin Schwidefsky .macro UPDATE_VTIME w1,w2,enter_timer 113a359bb11SMartin Schwidefsky lg \w1,__LC_EXIT_TIMER 114a359bb11SMartin Schwidefsky lg \w2,__LC_LAST_UPDATE_TIMER 115a359bb11SMartin Schwidefsky slg \w1,\enter_timer 116a359bb11SMartin Schwidefsky slg \w2,__LC_EXIT_TIMER 117a359bb11SMartin Schwidefsky alg \w1,__LC_USER_TIMER 118a359bb11SMartin Schwidefsky alg \w2,__LC_SYSTEM_TIMER 119a359bb11SMartin Schwidefsky stg \w1,__LC_USER_TIMER 120a359bb11SMartin Schwidefsky stg \w2,__LC_SYSTEM_TIMER 1214bfc86ceSHeiko Carstens mvc __LC_LAST_UPDATE_TIMER(8),\enter_timer 1224bfc86ceSHeiko Carstens .endm 1234bfc86ceSHeiko Carstens 1244bfc86ceSHeiko Carstens .macro REENABLE_IRQS 1254bfc86ceSHeiko Carstens stg %r8,__LC_RETURN_PSW 1264bfc86ceSHeiko Carstens ni __LC_RETURN_PSW,0xbf 1274bfc86ceSHeiko Carstens ssm __LC_RETURN_PSW 1284bfc86ceSHeiko Carstens .endm 1294bfc86ceSHeiko Carstens 1304bfc86ceSHeiko Carstens .macro STCK savearea 1314bfc86ceSHeiko Carstens#ifdef CONFIG_HAVE_MARCH_Z9_109_FEATURES 1324bfc86ceSHeiko Carstens .insn s,0xb27c0000,\savearea # store clock fast 1334bfc86ceSHeiko Carstens#else 1344bfc86ceSHeiko Carstens .insn s,0xb2050000,\savearea # store clock 1354bfc86ceSHeiko Carstens#endif 1364bfc86ceSHeiko Carstens .endm 1374bfc86ceSHeiko Carstens 13883abeffbSHendrik Brueckner /* 13983abeffbSHendrik Brueckner * The TSTMSK macro generates a test-under-mask instruction by 14083abeffbSHendrik Brueckner * calculating the memory offset for the specified mask value. 14183abeffbSHendrik Brueckner * Mask value can be any constant. The macro shifts the mask 14283abeffbSHendrik Brueckner * value to calculate the memory offset for the test-under-mask 14383abeffbSHendrik Brueckner * instruction. 14483abeffbSHendrik Brueckner */ 14583abeffbSHendrik Brueckner .macro TSTMSK addr, mask, size=8, bytepos=0 14683abeffbSHendrik Brueckner .if (\bytepos < \size) && (\mask >> 8) 14783abeffbSHendrik Brueckner .if (\mask & 0xff) 14883abeffbSHendrik Brueckner .error "Mask exceeds byte boundary" 14983abeffbSHendrik Brueckner .endif 15083abeffbSHendrik Brueckner TSTMSK \addr, "(\mask >> 8)", \size, "(\bytepos + 1)" 15183abeffbSHendrik Brueckner .exitm 15283abeffbSHendrik Brueckner .endif 15383abeffbSHendrik Brueckner .ifeq \mask 15483abeffbSHendrik Brueckner .error "Mask must not be zero" 15583abeffbSHendrik Brueckner .endif 15683abeffbSHendrik Brueckner off = \size - \bytepos - 1 15783abeffbSHendrik Brueckner tm off+\addr, \mask 15883abeffbSHendrik Brueckner .endm 15983abeffbSHendrik Brueckner 1604bfc86ceSHeiko Carstens .section .kprobes.text, "ax" 16146210c44SHeiko Carstens.Ldummy: 16246210c44SHeiko Carstens /* 16346210c44SHeiko Carstens * This nop exists only in order to avoid that __switch_to starts at 16446210c44SHeiko Carstens * the beginning of the kprobes text section. In that case we would 16546210c44SHeiko Carstens * have several symbols at the same address. E.g. objdump would take 16646210c44SHeiko Carstens * an arbitrary symbol name when disassembling this code. 16746210c44SHeiko Carstens * With the added nop in between the __switch_to symbol is unique 16846210c44SHeiko Carstens * again. 16946210c44SHeiko Carstens */ 17046210c44SHeiko Carstens nop 0 1714bfc86ceSHeiko Carstens 1724bfc86ceSHeiko Carstens/* 1734bfc86ceSHeiko Carstens * Scheduler resume function, called by switch_to 1744bfc86ceSHeiko Carstens * gpr2 = (task_struct *) prev 1754bfc86ceSHeiko Carstens * gpr3 = (task_struct *) next 1764bfc86ceSHeiko Carstens * Returns: 1774bfc86ceSHeiko Carstens * gpr2 = prev 1784bfc86ceSHeiko Carstens */ 1794bfc86ceSHeiko CarstensENTRY(__switch_to) 1804bfc86ceSHeiko Carstens stmg %r6,%r15,__SF_GPRS(%r15) # store gprs of prev task 1813827ec3dSMartin Schwidefsky lgr %r1,%r2 1823827ec3dSMartin Schwidefsky aghi %r1,__TASK_thread # thread_struct of prev task 183d5c352cdSHeiko Carstens lg %r5,__TASK_stack(%r3) # start of kernel stack of next 1843827ec3dSMartin Schwidefsky stg %r15,__THREAD_ksp(%r1) # store kernel stack of prev 1853827ec3dSMartin Schwidefsky lgr %r1,%r3 1863827ec3dSMartin Schwidefsky aghi %r1,__TASK_thread # thread_struct of next task 1874bfc86ceSHeiko Carstens lgr %r15,%r5 1884bfc86ceSHeiko Carstens aghi %r15,STACK_INIT # end of kernel stack of next 1894bfc86ceSHeiko Carstens stg %r3,__LC_CURRENT # store task struct of next 1904bfc86ceSHeiko Carstens stg %r15,__LC_KERNEL_STACK # store end of kernel stack 1913827ec3dSMartin Schwidefsky lg %r15,__THREAD_ksp(%r1) # load kernel stack of next 192e22cf8caSChristian Borntraeger mvc __LC_CURRENT_PID(4,%r0),__TASK_pid(%r3) # store pid of next 1934bfc86ceSHeiko Carstens lmg %r6,%r15,__SF_GPRS(%r15) # load gprs of next task 194e22cf8caSChristian Borntraeger TSTMSK __LC_MACHINE_FLAGS,MACHINE_FLAG_LPP 195e22cf8caSChristian Borntraeger bzr %r14 196e22cf8caSChristian Borntraeger .insn s,0xb2800000,__LC_LPP # set program parameter 1974bfc86ceSHeiko Carstens br %r14 1984bfc86ceSHeiko Carstens 1994bfc86ceSHeiko Carstens.L__critical_start: 200d0fc4107SMartin Schwidefsky 201d0fc4107SMartin Schwidefsky#if IS_ENABLED(CONFIG_KVM) 202d0fc4107SMartin Schwidefsky/* 203d0fc4107SMartin Schwidefsky * sie64a calling convention: 204d0fc4107SMartin Schwidefsky * %r2 pointer to sie control block 205d0fc4107SMartin Schwidefsky * %r3 guest register save area 206d0fc4107SMartin Schwidefsky */ 207d0fc4107SMartin SchwidefskyENTRY(sie64a) 208d0fc4107SMartin Schwidefsky stmg %r6,%r14,__SF_GPRS(%r15) # save kernel registers 209d0fc4107SMartin Schwidefsky stg %r2,__SF_EMPTY(%r15) # save control block pointer 210d0fc4107SMartin Schwidefsky stg %r3,__SF_EMPTY+8(%r15) # save guest register save area 211e22cf8caSChristian Borntraeger xc __SF_EMPTY+16(8,%r15),__SF_EMPTY+16(%r15) # reason code = 0 21283abeffbSHendrik Brueckner TSTMSK __LC_CPU_FLAGS,_CIF_FPU # load guest fp/vx registers ? 213d0fc4107SMartin Schwidefsky jno .Lsie_load_guest_gprs 214d0fc4107SMartin Schwidefsky brasl %r14,load_fpu_regs # load guest fp/vx regs 215d0fc4107SMartin Schwidefsky.Lsie_load_guest_gprs: 216d0fc4107SMartin Schwidefsky lmg %r0,%r13,0(%r3) # load guest gprs 0-13 217d0fc4107SMartin Schwidefsky lg %r14,__LC_GMAP # get gmap pointer 218d0fc4107SMartin Schwidefsky ltgr %r14,%r14 219d0fc4107SMartin Schwidefsky jz .Lsie_gmap 220d0fc4107SMartin Schwidefsky lctlg %c1,%c1,__GMAP_ASCE(%r14) # load primary asce 221d0fc4107SMartin Schwidefsky.Lsie_gmap: 222d0fc4107SMartin Schwidefsky lg %r14,__SF_EMPTY(%r15) # get control block pointer 223d0fc4107SMartin Schwidefsky oi __SIE_PROG0C+3(%r14),1 # we are going into SIE now 224d0fc4107SMartin Schwidefsky tm __SIE_PROG20+3(%r14),3 # last exit... 225d0fc4107SMartin Schwidefsky jnz .Lsie_skip 22683abeffbSHendrik Brueckner TSTMSK __LC_CPU_FLAGS,_CIF_FPU 227d0fc4107SMartin Schwidefsky jo .Lsie_skip # exit if fp/vx regs changed 228d0fc4107SMartin Schwidefsky sie 0(%r14) 229d0fc4107SMartin Schwidefsky.Lsie_skip: 230d0fc4107SMartin Schwidefsky ni __SIE_PROG0C+3(%r14),0xfe # no longer in SIE 231d0fc4107SMartin Schwidefsky lctlg %c1,%c1,__LC_USER_ASCE # load primary asce 232d0fc4107SMartin Schwidefsky.Lsie_done: 233d0fc4107SMartin Schwidefsky# some program checks are suppressing. C code (e.g. do_protection_exception) 234d0fc4107SMartin Schwidefsky# will rewind the PSW by the ILC, which is 4 bytes in case of SIE. Other 235d0fc4107SMartin Schwidefsky# instructions between sie64a and .Lsie_done should not cause program 236d0fc4107SMartin Schwidefsky# interrupts. So lets use a nop (47 00 00 00) as a landing pad. 237d0fc4107SMartin Schwidefsky# See also .Lcleanup_sie 238d0fc4107SMartin Schwidefsky.Lrewind_pad: 239d0fc4107SMartin Schwidefsky nop 0 240d0fc4107SMartin Schwidefsky .globl sie_exit 241d0fc4107SMartin Schwidefskysie_exit: 242d0fc4107SMartin Schwidefsky lg %r14,__SF_EMPTY+8(%r15) # load guest register save area 243d0fc4107SMartin Schwidefsky stmg %r0,%r13,0(%r14) # save guest gprs 0-13 244d0fc4107SMartin Schwidefsky lmg %r6,%r14,__SF_GPRS(%r15) # restore kernel registers 245e22cf8caSChristian Borntraeger lg %r2,__SF_EMPTY+16(%r15) # return exit reason code 246d0fc4107SMartin Schwidefsky br %r14 247d0fc4107SMartin Schwidefsky.Lsie_fault: 248d0fc4107SMartin Schwidefsky lghi %r14,-EFAULT 249e22cf8caSChristian Borntraeger stg %r14,__SF_EMPTY+16(%r15) # set exit reason code 250d0fc4107SMartin Schwidefsky j sie_exit 251d0fc4107SMartin Schwidefsky 252d0fc4107SMartin Schwidefsky EX_TABLE(.Lrewind_pad,.Lsie_fault) 253d0fc4107SMartin Schwidefsky EX_TABLE(sie_exit,.Lsie_fault) 254711f5df7SAl ViroEXPORT_SYMBOL(sie64a) 255711f5df7SAl ViroEXPORT_SYMBOL(sie_exit) 256d0fc4107SMartin Schwidefsky#endif 257d0fc4107SMartin Schwidefsky 2584bfc86ceSHeiko Carstens/* 2594bfc86ceSHeiko Carstens * SVC interrupt handler routine. System calls are synchronous events and 2604bfc86ceSHeiko Carstens * are executed with interrupts enabled. 2614bfc86ceSHeiko Carstens */ 2624bfc86ceSHeiko Carstens 2634bfc86ceSHeiko CarstensENTRY(system_call) 2644bfc86ceSHeiko Carstens stpt __LC_SYNC_ENTER_TIMER 2654bfc86ceSHeiko Carstens.Lsysc_stmg: 2664bfc86ceSHeiko Carstens stmg %r8,%r15,__LC_SAVE_AREA_SYNC 267d5c352cdSHeiko Carstens lg %r12,__LC_CURRENT 26834525e1fSMartin Schwidefsky lghi %r13,__TASK_thread 2694bfc86ceSHeiko Carstens lghi %r14,_PIF_SYSCALL 2704bfc86ceSHeiko Carstens.Lsysc_per: 2714bfc86ceSHeiko Carstens lg %r15,__LC_KERNEL_STACK 2724bfc86ceSHeiko Carstens la %r11,STACK_FRAME_OVERHEAD(%r15) # pointer to pt_regs 273a359bb11SMartin Schwidefsky.Lsysc_vtime: 27434525e1fSMartin Schwidefsky UPDATE_VTIME %r8,%r9,__LC_SYNC_ENTER_TIMER 2754bfc86ceSHeiko Carstens stmg %r0,%r7,__PT_R0(%r11) 2764bfc86ceSHeiko Carstens mvc __PT_R8(64,%r11),__LC_SAVE_AREA_SYNC 2774bfc86ceSHeiko Carstens mvc __PT_PSW(16,%r11),__LC_SVC_OLD_PSW 2784bfc86ceSHeiko Carstens mvc __PT_INT_CODE(4,%r11),__LC_SVC_ILC 2794bfc86ceSHeiko Carstens stg %r14,__PT_FLAGS(%r11) 2804bfc86ceSHeiko Carstens.Lsysc_do_svc: 281ef280c85SMartin Schwidefsky # load address of system call table 282ef280c85SMartin Schwidefsky lg %r10,__THREAD_sysc_table(%r13,%r12) 2834bfc86ceSHeiko Carstens llgh %r8,__PT_INT_CODE+2(%r11) 2844bfc86ceSHeiko Carstens slag %r8,%r8,2 # shift and test for svc 0 2854bfc86ceSHeiko Carstens jnz .Lsysc_nr_ok 2864bfc86ceSHeiko Carstens # svc 0: system call number in %r1 2874bfc86ceSHeiko Carstens llgfr %r1,%r1 # clear high word in r1 2884bfc86ceSHeiko Carstens cghi %r1,NR_syscalls 2894bfc86ceSHeiko Carstens jnl .Lsysc_nr_ok 2904bfc86ceSHeiko Carstens sth %r1,__PT_INT_CODE+2(%r11) 2914bfc86ceSHeiko Carstens slag %r8,%r1,2 2924bfc86ceSHeiko Carstens.Lsysc_nr_ok: 2934bfc86ceSHeiko Carstens xc __SF_BACKCHAIN(8,%r15),__SF_BACKCHAIN(%r15) 2944bfc86ceSHeiko Carstens stg %r2,__PT_ORIG_GPR2(%r11) 2954bfc86ceSHeiko Carstens stg %r7,STACK_FRAME_OVERHEAD(%r15) 2964bfc86ceSHeiko Carstens lgf %r9,0(%r8,%r10) # get system call add. 29783abeffbSHendrik Brueckner TSTMSK __TI_flags(%r12),_TIF_TRACE 2984bfc86ceSHeiko Carstens jnz .Lsysc_tracesys 2994bfc86ceSHeiko Carstens basr %r14,%r9 # call sys_xxxx 3004bfc86ceSHeiko Carstens stg %r2,__PT_R2(%r11) # store return value 3014bfc86ceSHeiko Carstens 3024bfc86ceSHeiko Carstens.Lsysc_return: 3034bfc86ceSHeiko Carstens LOCKDEP_SYS_EXIT 3044bfc86ceSHeiko Carstens.Lsysc_tif: 30583abeffbSHendrik Brueckner TSTMSK __PT_FLAGS(%r11),_PIF_WORK 3064bfc86ceSHeiko Carstens jnz .Lsysc_work 30783abeffbSHendrik Brueckner TSTMSK __TI_flags(%r12),_TIF_WORK 3084bfc86ceSHeiko Carstens jnz .Lsysc_work # check for work 30983abeffbSHendrik Brueckner TSTMSK __LC_CPU_FLAGS,_CIF_WORK 3104bfc86ceSHeiko Carstens jnz .Lsysc_work 3114bfc86ceSHeiko Carstens.Lsysc_restore: 3124bfc86ceSHeiko Carstens lg %r14,__LC_VDSO_PER_CPU 3134bfc86ceSHeiko Carstens lmg %r0,%r10,__PT_R0(%r11) 3144bfc86ceSHeiko Carstens mvc __LC_RETURN_PSW(16),__PT_PSW(%r11) 315*07a63cbeSMartin Schwidefsky.Lsysc_exit_timer: 3164bfc86ceSHeiko Carstens stpt __LC_EXIT_TIMER 3174bfc86ceSHeiko Carstens mvc __VDSO_ECTG_BASE(16,%r14),__LC_EXIT_TIMER 3184bfc86ceSHeiko Carstens lmg %r11,%r15,__PT_R11(%r11) 3194bfc86ceSHeiko Carstens lpswe __LC_RETURN_PSW 3204bfc86ceSHeiko Carstens.Lsysc_done: 3214bfc86ceSHeiko Carstens 3224bfc86ceSHeiko Carstens# 3234bfc86ceSHeiko Carstens# One of the work bits is on. Find out which one. 3244bfc86ceSHeiko Carstens# 3254bfc86ceSHeiko Carstens.Lsysc_work: 32683abeffbSHendrik Brueckner TSTMSK __LC_CPU_FLAGS,_CIF_MCCK_PENDING 3274bfc86ceSHeiko Carstens jo .Lsysc_mcck_pending 32883abeffbSHendrik Brueckner TSTMSK __TI_flags(%r12),_TIF_NEED_RESCHED 3294bfc86ceSHeiko Carstens jo .Lsysc_reschedule 3304bfc86ceSHeiko Carstens#ifdef CONFIG_UPROBES 33183abeffbSHendrik Brueckner TSTMSK __TI_flags(%r12),_TIF_UPROBE 3324bfc86ceSHeiko Carstens jo .Lsysc_uprobe_notify 3334bfc86ceSHeiko Carstens#endif 334916cda1aSMartin Schwidefsky TSTMSK __TI_flags(%r12),_TIF_GUARDED_STORAGE 335916cda1aSMartin Schwidefsky jo .Lsysc_guarded_storage 33683abeffbSHendrik Brueckner TSTMSK __PT_FLAGS(%r11),_PIF_PER_TRAP 3374bfc86ceSHeiko Carstens jo .Lsysc_singlestep 3382f09ca60SMiroslav Benes#ifdef CONFIG_LIVEPATCH 3392f09ca60SMiroslav Benes TSTMSK __TI_flags(%r12),_TIF_PATCH_PENDING 3402f09ca60SMiroslav Benes jo .Lsysc_patch_pending # handle live patching just before 3412f09ca60SMiroslav Benes # signals and possible syscall restart 3422f09ca60SMiroslav Benes#endif 34383abeffbSHendrik Brueckner TSTMSK __TI_flags(%r12),_TIF_SIGPENDING 3444bfc86ceSHeiko Carstens jo .Lsysc_sigpending 34583abeffbSHendrik Brueckner TSTMSK __TI_flags(%r12),_TIF_NOTIFY_RESUME 3464bfc86ceSHeiko Carstens jo .Lsysc_notify_resume 34783abeffbSHendrik Brueckner TSTMSK __LC_CPU_FLAGS,_CIF_FPU 3489977e886SHendrik Brueckner jo .Lsysc_vxrs 349b5a882fcSHeiko Carstens TSTMSK __LC_CPU_FLAGS,(_CIF_ASCE_PRIMARY|_CIF_ASCE_SECONDARY) 350b5a882fcSHeiko Carstens jnz .Lsysc_asce 3514bfc86ceSHeiko Carstens j .Lsysc_return # beware of critical section cleanup 3524bfc86ceSHeiko Carstens 3534bfc86ceSHeiko Carstens# 3544bfc86ceSHeiko Carstens# _TIF_NEED_RESCHED is set, call schedule 3554bfc86ceSHeiko Carstens# 3564bfc86ceSHeiko Carstens.Lsysc_reschedule: 3574bfc86ceSHeiko Carstens larl %r14,.Lsysc_return 3584bfc86ceSHeiko Carstens jg schedule 3594bfc86ceSHeiko Carstens 3604bfc86ceSHeiko Carstens# 3614bfc86ceSHeiko Carstens# _CIF_MCCK_PENDING is set, call handler 3624bfc86ceSHeiko Carstens# 3634bfc86ceSHeiko Carstens.Lsysc_mcck_pending: 3644bfc86ceSHeiko Carstens larl %r14,.Lsysc_return 3654bfc86ceSHeiko Carstens jg s390_handle_mcck # TIF bit will be cleared by handler 3664bfc86ceSHeiko Carstens 3674bfc86ceSHeiko Carstens# 368b5a882fcSHeiko Carstens# _CIF_ASCE_PRIMARY and/or CIF_ASCE_SECONDARY set, load user space asce 3694bfc86ceSHeiko Carstens# 370b5a882fcSHeiko Carstens.Lsysc_asce: 371606aa4aaSHeiko Carstens ni __LC_CPU_FLAGS+7,255-_CIF_ASCE_PRIMARY 3724bfc86ceSHeiko Carstens lctlg %c1,%c1,__LC_USER_ASCE # load primary asce 373b5a882fcSHeiko Carstens TSTMSK __LC_CPU_FLAGS,_CIF_ASCE_SECONDARY 374b5a882fcSHeiko Carstens jz .Lsysc_return 375b5a882fcSHeiko Carstens larl %r14,.Lsysc_return 376b5a882fcSHeiko Carstens jg set_fs_fixup 3774bfc86ceSHeiko Carstens 3784bfc86ceSHeiko Carstens# 3799977e886SHendrik Brueckner# CIF_FPU is set, restore floating-point controls and floating-point registers. 3809977e886SHendrik Brueckner# 3819977e886SHendrik Brueckner.Lsysc_vxrs: 3829977e886SHendrik Brueckner larl %r14,.Lsysc_return 3839977e886SHendrik Brueckner jg load_fpu_regs 3849977e886SHendrik Brueckner 3859977e886SHendrik Brueckner# 3864bfc86ceSHeiko Carstens# _TIF_SIGPENDING is set, call do_signal 3874bfc86ceSHeiko Carstens# 3884bfc86ceSHeiko Carstens.Lsysc_sigpending: 3894bfc86ceSHeiko Carstens lgr %r2,%r11 # pass pointer to pt_regs 3904bfc86ceSHeiko Carstens brasl %r14,do_signal 39183abeffbSHendrik Brueckner TSTMSK __PT_FLAGS(%r11),_PIF_SYSCALL 3924bfc86ceSHeiko Carstens jno .Lsysc_return 39357d7f939SMartin Schwidefsky.Lsysc_do_syscall: 39457d7f939SMartin Schwidefsky lghi %r13,__TASK_thread 3954bfc86ceSHeiko Carstens lmg %r2,%r7,__PT_R2(%r11) # load svc arguments 39657d7f939SMartin Schwidefsky lghi %r1,0 # svc 0 returns -ENOSYS 39757d7f939SMartin Schwidefsky j .Lsysc_do_svc 3984bfc86ceSHeiko Carstens 3994bfc86ceSHeiko Carstens# 4004bfc86ceSHeiko Carstens# _TIF_NOTIFY_RESUME is set, call do_notify_resume 4014bfc86ceSHeiko Carstens# 4024bfc86ceSHeiko Carstens.Lsysc_notify_resume: 4034bfc86ceSHeiko Carstens lgr %r2,%r11 # pass pointer to pt_regs 4044bfc86ceSHeiko Carstens larl %r14,.Lsysc_return 4054bfc86ceSHeiko Carstens jg do_notify_resume 4064bfc86ceSHeiko Carstens 4074bfc86ceSHeiko Carstens# 4084bfc86ceSHeiko Carstens# _TIF_UPROBE is set, call uprobe_notify_resume 4094bfc86ceSHeiko Carstens# 4104bfc86ceSHeiko Carstens#ifdef CONFIG_UPROBES 4114bfc86ceSHeiko Carstens.Lsysc_uprobe_notify: 4124bfc86ceSHeiko Carstens lgr %r2,%r11 # pass pointer to pt_regs 4134bfc86ceSHeiko Carstens larl %r14,.Lsysc_return 4144bfc86ceSHeiko Carstens jg uprobe_notify_resume 4154bfc86ceSHeiko Carstens#endif 4164bfc86ceSHeiko Carstens 4174bfc86ceSHeiko Carstens# 418916cda1aSMartin Schwidefsky# _TIF_GUARDED_STORAGE is set, call guarded_storage_load 419916cda1aSMartin Schwidefsky# 420916cda1aSMartin Schwidefsky.Lsysc_guarded_storage: 421916cda1aSMartin Schwidefsky lgr %r2,%r11 # pass pointer to pt_regs 422916cda1aSMartin Schwidefsky larl %r14,.Lsysc_return 423916cda1aSMartin Schwidefsky jg gs_load_bc_cb 42476f1948aSLinus Torvalds# 4252f09ca60SMiroslav Benes# _TIF_PATCH_PENDING is set, call klp_update_patch_state 4262f09ca60SMiroslav Benes# 4272f09ca60SMiroslav Benes#ifdef CONFIG_LIVEPATCH 4282f09ca60SMiroslav Benes.Lsysc_patch_pending: 4292f09ca60SMiroslav Benes lg %r2,__LC_CURRENT # pass pointer to task struct 4302f09ca60SMiroslav Benes larl %r14,.Lsysc_return 4312f09ca60SMiroslav Benes jg klp_update_patch_state 4322f09ca60SMiroslav Benes#endif 433916cda1aSMartin Schwidefsky 434916cda1aSMartin Schwidefsky# 4354bfc86ceSHeiko Carstens# _PIF_PER_TRAP is set, call do_per_trap 4364bfc86ceSHeiko Carstens# 4374bfc86ceSHeiko Carstens.Lsysc_singlestep: 4384bfc86ceSHeiko Carstens ni __PT_FLAGS+7(%r11),255-_PIF_PER_TRAP 4394bfc86ceSHeiko Carstens lgr %r2,%r11 # pass pointer to pt_regs 4404bfc86ceSHeiko Carstens larl %r14,.Lsysc_return 4414bfc86ceSHeiko Carstens jg do_per_trap 4424bfc86ceSHeiko Carstens 4434bfc86ceSHeiko Carstens# 4444bfc86ceSHeiko Carstens# call tracehook_report_syscall_entry/tracehook_report_syscall_exit before 4454bfc86ceSHeiko Carstens# and after the system call 4464bfc86ceSHeiko Carstens# 4474bfc86ceSHeiko Carstens.Lsysc_tracesys: 4484bfc86ceSHeiko Carstens lgr %r2,%r11 # pass pointer to pt_regs 4494bfc86ceSHeiko Carstens la %r3,0 4504bfc86ceSHeiko Carstens llgh %r0,__PT_INT_CODE+2(%r11) 4514bfc86ceSHeiko Carstens stg %r0,__PT_R2(%r11) 4524bfc86ceSHeiko Carstens brasl %r14,do_syscall_trace_enter 4534bfc86ceSHeiko Carstens lghi %r0,NR_syscalls 4544bfc86ceSHeiko Carstens clgr %r0,%r2 4554bfc86ceSHeiko Carstens jnh .Lsysc_tracenogo 4564bfc86ceSHeiko Carstens sllg %r8,%r2,2 4574bfc86ceSHeiko Carstens lgf %r9,0(%r8,%r10) 4584bfc86ceSHeiko Carstens.Lsysc_tracego: 4594bfc86ceSHeiko Carstens lmg %r3,%r7,__PT_R3(%r11) 4604bfc86ceSHeiko Carstens stg %r7,STACK_FRAME_OVERHEAD(%r15) 4614bfc86ceSHeiko Carstens lg %r2,__PT_ORIG_GPR2(%r11) 4624bfc86ceSHeiko Carstens basr %r14,%r9 # call sys_xxx 4634bfc86ceSHeiko Carstens stg %r2,__PT_R2(%r11) # store return value 4644bfc86ceSHeiko Carstens.Lsysc_tracenogo: 46583abeffbSHendrik Brueckner TSTMSK __TI_flags(%r12),_TIF_TRACE 4664bfc86ceSHeiko Carstens jz .Lsysc_return 4674bfc86ceSHeiko Carstens lgr %r2,%r11 # pass pointer to pt_regs 4684bfc86ceSHeiko Carstens larl %r14,.Lsysc_return 4694bfc86ceSHeiko Carstens jg do_syscall_trace_exit 4704bfc86ceSHeiko Carstens 4714bfc86ceSHeiko Carstens# 4724bfc86ceSHeiko Carstens# a new process exits the kernel with ret_from_fork 4734bfc86ceSHeiko Carstens# 4744bfc86ceSHeiko CarstensENTRY(ret_from_fork) 4754bfc86ceSHeiko Carstens la %r11,STACK_FRAME_OVERHEAD(%r15) 476d5c352cdSHeiko Carstens lg %r12,__LC_CURRENT 4774bfc86ceSHeiko Carstens brasl %r14,schedule_tail 4784bfc86ceSHeiko Carstens TRACE_IRQS_ON 4794bfc86ceSHeiko Carstens ssm __LC_SVC_NEW_PSW # reenable interrupts 4804bfc86ceSHeiko Carstens tm __PT_PSW+1(%r11),0x01 # forking a kernel thread ? 4814bfc86ceSHeiko Carstens jne .Lsysc_tracenogo 4824bfc86ceSHeiko Carstens # it's a kernel thread 4834bfc86ceSHeiko Carstens lmg %r9,%r10,__PT_R9(%r11) # load gprs 4844bfc86ceSHeiko CarstensENTRY(kernel_thread_starter) 4854bfc86ceSHeiko Carstens la %r2,0(%r10) 4864bfc86ceSHeiko Carstens basr %r14,%r9 4874bfc86ceSHeiko Carstens j .Lsysc_tracenogo 4884bfc86ceSHeiko Carstens 4894bfc86ceSHeiko Carstens/* 4904bfc86ceSHeiko Carstens * Program check handler routine 4914bfc86ceSHeiko Carstens */ 4924bfc86ceSHeiko Carstens 4934bfc86ceSHeiko CarstensENTRY(pgm_check_handler) 4944bfc86ceSHeiko Carstens stpt __LC_SYNC_ENTER_TIMER 4954bfc86ceSHeiko Carstens stmg %r8,%r15,__LC_SAVE_AREA_SYNC 4964bfc86ceSHeiko Carstens lg %r10,__LC_LAST_BREAK 497d5c352cdSHeiko Carstens lg %r12,__LC_CURRENT 4989977e886SHendrik Brueckner larl %r13,cleanup_critical 4994bfc86ceSHeiko Carstens lmg %r8,%r9,__LC_PGM_OLD_PSW 5004bfc86ceSHeiko Carstens tmhh %r8,0x0001 # test problem state bit 501d0fc4107SMartin Schwidefsky jnz 2f # -> fault in user space 502d0fc4107SMartin Schwidefsky#if IS_ENABLED(CONFIG_KVM) 503d0fc4107SMartin Schwidefsky # cleanup critical section for sie64a 504d0fc4107SMartin Schwidefsky lgr %r14,%r9 505d0fc4107SMartin Schwidefsky slg %r14,BASED(.Lsie_critical_start) 506d0fc4107SMartin Schwidefsky clg %r14,BASED(.Lsie_critical_length) 507d0fc4107SMartin Schwidefsky jhe 0f 508d0fc4107SMartin Schwidefsky brasl %r14,.Lcleanup_sie 509d0fc4107SMartin Schwidefsky#endif 510d0fc4107SMartin Schwidefsky0: tmhh %r8,0x4000 # PER bit set in old PSW ? 511d0fc4107SMartin Schwidefsky jnz 1f # -> enabled, can't be a double fault 5124bfc86ceSHeiko Carstens tm __LC_PGM_ILC+3,0x80 # check for per exception 5134bfc86ceSHeiko Carstens jnz .Lpgm_svcper # -> single stepped svc 514d0fc4107SMartin Schwidefsky1: CHECK_STACK STACK_SIZE,__LC_SAVE_AREA_SYNC 5154bfc86ceSHeiko Carstens aghi %r15,-(STACK_FRAME_OVERHEAD + __PT_SIZE) 516d9fcf2a1SMartin Schwidefsky j 4f 51734525e1fSMartin Schwidefsky2: UPDATE_VTIME %r14,%r15,__LC_SYNC_ENTER_TIMER 5184bfc86ceSHeiko Carstens lg %r15,__LC_KERNEL_STACK 519d5c352cdSHeiko Carstens lgr %r14,%r12 5203827ec3dSMartin Schwidefsky aghi %r14,__TASK_thread # pointer to thread_struct 5214bfc86ceSHeiko Carstens lghi %r13,__LC_PGM_TDB 5224bfc86ceSHeiko Carstens tm __LC_PGM_ILC+2,0x02 # check for transaction abort 523d0fc4107SMartin Schwidefsky jz 3f 5244bfc86ceSHeiko Carstens mvc __THREAD_trap_tdb(256,%r14),0(%r13) 525d9fcf2a1SMartin Schwidefsky3: stg %r10,__THREAD_last_break(%r14) 526d9fcf2a1SMartin Schwidefsky4: la %r11,STACK_FRAME_OVERHEAD(%r15) 5274bfc86ceSHeiko Carstens stmg %r0,%r7,__PT_R0(%r11) 5284bfc86ceSHeiko Carstens mvc __PT_R8(64,%r11),__LC_SAVE_AREA_SYNC 5294bfc86ceSHeiko Carstens stmg %r8,%r9,__PT_PSW(%r11) 5304bfc86ceSHeiko Carstens mvc __PT_INT_CODE(4,%r11),__LC_PGM_ILC 5314bfc86ceSHeiko Carstens mvc __PT_INT_PARM_LONG(8,%r11),__LC_TRANS_EXC_CODE 5324bfc86ceSHeiko Carstens xc __PT_FLAGS(8,%r11),__PT_FLAGS(%r11) 5334bfc86ceSHeiko Carstens stg %r10,__PT_ARGS(%r11) 5344bfc86ceSHeiko Carstens tm __LC_PGM_ILC+3,0x80 # check for per exception 535d9fcf2a1SMartin Schwidefsky jz 5f 5364bfc86ceSHeiko Carstens tmhh %r8,0x0001 # kernel per event ? 5374bfc86ceSHeiko Carstens jz .Lpgm_kprobe 5384bfc86ceSHeiko Carstens oi __PT_FLAGS+7(%r11),_PIF_PER_TRAP 5394bfc86ceSHeiko Carstens mvc __THREAD_per_address(8,%r14),__LC_PER_ADDRESS 5404bfc86ceSHeiko Carstens mvc __THREAD_per_cause(2,%r14),__LC_PER_CODE 5414bfc86ceSHeiko Carstens mvc __THREAD_per_paid(1,%r14),__LC_PER_ACCESS_ID 542d9fcf2a1SMartin Schwidefsky5: REENABLE_IRQS 5434bfc86ceSHeiko Carstens xc __SF_BACKCHAIN(8,%r15),__SF_BACKCHAIN(%r15) 5444bfc86ceSHeiko Carstens larl %r1,pgm_check_table 5454bfc86ceSHeiko Carstens llgh %r10,__PT_INT_CODE+2(%r11) 5464bfc86ceSHeiko Carstens nill %r10,0x007f 5474bfc86ceSHeiko Carstens sll %r10,2 548a359bb11SMartin Schwidefsky je .Lpgm_return 5494bfc86ceSHeiko Carstens lgf %r1,0(%r10,%r1) # load address of handler routine 5504bfc86ceSHeiko Carstens lgr %r2,%r11 # pass pointer to pt_regs 5514bfc86ceSHeiko Carstens basr %r14,%r1 # branch to interrupt-handler 552a359bb11SMartin Schwidefsky.Lpgm_return: 553a359bb11SMartin Schwidefsky LOCKDEP_SYS_EXIT 554a359bb11SMartin Schwidefsky tm __PT_PSW+1(%r11),0x01 # returning to user ? 555a359bb11SMartin Schwidefsky jno .Lsysc_restore 55657d7f939SMartin Schwidefsky TSTMSK __PT_FLAGS(%r11),_PIF_SYSCALL 55757d7f939SMartin Schwidefsky jo .Lsysc_do_syscall 558a359bb11SMartin Schwidefsky j .Lsysc_tif 5594bfc86ceSHeiko Carstens 5604bfc86ceSHeiko Carstens# 5614bfc86ceSHeiko Carstens# PER event in supervisor state, must be kprobes 5624bfc86ceSHeiko Carstens# 5634bfc86ceSHeiko Carstens.Lpgm_kprobe: 5644bfc86ceSHeiko Carstens REENABLE_IRQS 5654bfc86ceSHeiko Carstens xc __SF_BACKCHAIN(8,%r15),__SF_BACKCHAIN(%r15) 5664bfc86ceSHeiko Carstens lgr %r2,%r11 # pass pointer to pt_regs 5674bfc86ceSHeiko Carstens brasl %r14,do_per_trap 568a359bb11SMartin Schwidefsky j .Lpgm_return 5694bfc86ceSHeiko Carstens 5704bfc86ceSHeiko Carstens# 5714bfc86ceSHeiko Carstens# single stepped system call 5724bfc86ceSHeiko Carstens# 5734bfc86ceSHeiko Carstens.Lpgm_svcper: 5744bfc86ceSHeiko Carstens mvc __LC_RETURN_PSW(8),__LC_SVC_NEW_PSW 575d24b98e3SMartin Schwidefsky lghi %r13,__TASK_thread 5764bfc86ceSHeiko Carstens larl %r14,.Lsysc_per 5774bfc86ceSHeiko Carstens stg %r14,__LC_RETURN_PSW+8 5784bfc86ceSHeiko Carstens lghi %r14,_PIF_SYSCALL | _PIF_PER_TRAP 5794bfc86ceSHeiko Carstens lpswe __LC_RETURN_PSW # branch to .Lsysc_per and enable irqs 5804bfc86ceSHeiko Carstens 5814bfc86ceSHeiko Carstens/* 5824bfc86ceSHeiko Carstens * IO interrupt handler routine 5834bfc86ceSHeiko Carstens */ 5844bfc86ceSHeiko CarstensENTRY(io_int_handler) 5854bfc86ceSHeiko Carstens STCK __LC_INT_CLOCK 5864bfc86ceSHeiko Carstens stpt __LC_ASYNC_ENTER_TIMER 5874bfc86ceSHeiko Carstens stmg %r8,%r15,__LC_SAVE_AREA_ASYNC 588d5c352cdSHeiko Carstens lg %r12,__LC_CURRENT 5899977e886SHendrik Brueckner larl %r13,cleanup_critical 5904bfc86ceSHeiko Carstens lmg %r8,%r9,__LC_IO_OLD_PSW 5912acb94f4SMartin Schwidefsky SWITCH_ASYNC __LC_SAVE_AREA_ASYNC,__LC_ASYNC_ENTER_TIMER 5924bfc86ceSHeiko Carstens stmg %r0,%r7,__PT_R0(%r11) 5934bfc86ceSHeiko Carstens mvc __PT_R8(64,%r11),__LC_SAVE_AREA_ASYNC 5944bfc86ceSHeiko Carstens stmg %r8,%r9,__PT_PSW(%r11) 5954bfc86ceSHeiko Carstens mvc __PT_INT_CODE(12,%r11),__LC_SUBCHANNEL_ID 5964bfc86ceSHeiko Carstens xc __PT_FLAGS(8,%r11),__PT_FLAGS(%r11) 597db7e007fSHeiko Carstens TSTMSK __LC_CPU_FLAGS,_CIF_IGNORE_IRQ 598db7e007fSHeiko Carstens jo .Lio_restore 5994bfc86ceSHeiko Carstens TRACE_IRQS_OFF 6004bfc86ceSHeiko Carstens xc __SF_BACKCHAIN(8,%r15),__SF_BACKCHAIN(%r15) 6014bfc86ceSHeiko Carstens.Lio_loop: 6024bfc86ceSHeiko Carstens lgr %r2,%r11 # pass pointer to pt_regs 6034bfc86ceSHeiko Carstens lghi %r3,IO_INTERRUPT 6044bfc86ceSHeiko Carstens tm __PT_INT_CODE+8(%r11),0x80 # adapter interrupt ? 6054bfc86ceSHeiko Carstens jz .Lio_call 6064bfc86ceSHeiko Carstens lghi %r3,THIN_INTERRUPT 6074bfc86ceSHeiko Carstens.Lio_call: 6084bfc86ceSHeiko Carstens brasl %r14,do_IRQ 60983abeffbSHendrik Brueckner TSTMSK __LC_MACHINE_FLAGS,MACHINE_FLAG_LPAR 6104bfc86ceSHeiko Carstens jz .Lio_return 6114bfc86ceSHeiko Carstens tpi 0 6124bfc86ceSHeiko Carstens jz .Lio_return 6134bfc86ceSHeiko Carstens mvc __PT_INT_CODE(12,%r11),__LC_SUBCHANNEL_ID 6144bfc86ceSHeiko Carstens j .Lio_loop 6154bfc86ceSHeiko Carstens.Lio_return: 6164bfc86ceSHeiko Carstens LOCKDEP_SYS_EXIT 6174bfc86ceSHeiko Carstens TRACE_IRQS_ON 6184bfc86ceSHeiko Carstens.Lio_tif: 61983abeffbSHendrik Brueckner TSTMSK __TI_flags(%r12),_TIF_WORK 6204bfc86ceSHeiko Carstens jnz .Lio_work # there is work to do (signals etc.) 62183abeffbSHendrik Brueckner TSTMSK __LC_CPU_FLAGS,_CIF_WORK 6224bfc86ceSHeiko Carstens jnz .Lio_work 6234bfc86ceSHeiko Carstens.Lio_restore: 6244bfc86ceSHeiko Carstens lg %r14,__LC_VDSO_PER_CPU 6254bfc86ceSHeiko Carstens lmg %r0,%r10,__PT_R0(%r11) 6264bfc86ceSHeiko Carstens mvc __LC_RETURN_PSW(16),__PT_PSW(%r11) 627*07a63cbeSMartin Schwidefsky.Lio_exit_timer: 6284bfc86ceSHeiko Carstens stpt __LC_EXIT_TIMER 6294bfc86ceSHeiko Carstens mvc __VDSO_ECTG_BASE(16,%r14),__LC_EXIT_TIMER 6304bfc86ceSHeiko Carstens lmg %r11,%r15,__PT_R11(%r11) 6314bfc86ceSHeiko Carstens lpswe __LC_RETURN_PSW 6324bfc86ceSHeiko Carstens.Lio_done: 6334bfc86ceSHeiko Carstens 6344bfc86ceSHeiko Carstens# 6354bfc86ceSHeiko Carstens# There is work todo, find out in which context we have been interrupted: 6364bfc86ceSHeiko Carstens# 1) if we return to user space we can do all _TIF_WORK work 6374bfc86ceSHeiko Carstens# 2) if we return to kernel code and kvm is enabled check if we need to 6384bfc86ceSHeiko Carstens# modify the psw to leave SIE 6394bfc86ceSHeiko Carstens# 3) if we return to kernel code and preemptive scheduling is enabled check 6404bfc86ceSHeiko Carstens# the preemption counter and if it is zero call preempt_schedule_irq 6414bfc86ceSHeiko Carstens# Before any work can be done, a switch to the kernel stack is required. 6424bfc86ceSHeiko Carstens# 6434bfc86ceSHeiko Carstens.Lio_work: 6444bfc86ceSHeiko Carstens tm __PT_PSW+1(%r11),0x01 # returning to user ? 6454bfc86ceSHeiko Carstens jo .Lio_work_user # yes -> do resched & signal 6464bfc86ceSHeiko Carstens#ifdef CONFIG_PREEMPT 6474bfc86ceSHeiko Carstens # check for preemptive scheduling 648c360192bSMartin Schwidefsky icm %r0,15,__LC_PREEMPT_COUNT 6494bfc86ceSHeiko Carstens jnz .Lio_restore # preemption is disabled 65083abeffbSHendrik Brueckner TSTMSK __TI_flags(%r12),_TIF_NEED_RESCHED 6514bfc86ceSHeiko Carstens jno .Lio_restore 6524bfc86ceSHeiko Carstens # switch to kernel stack 6534bfc86ceSHeiko Carstens lg %r1,__PT_R15(%r11) 6544bfc86ceSHeiko Carstens aghi %r1,-(STACK_FRAME_OVERHEAD + __PT_SIZE) 6554bfc86ceSHeiko Carstens mvc STACK_FRAME_OVERHEAD(__PT_SIZE,%r1),0(%r11) 6564bfc86ceSHeiko Carstens xc __SF_BACKCHAIN(8,%r1),__SF_BACKCHAIN(%r1) 6574bfc86ceSHeiko Carstens la %r11,STACK_FRAME_OVERHEAD(%r1) 6584bfc86ceSHeiko Carstens lgr %r15,%r1 6594bfc86ceSHeiko Carstens # TRACE_IRQS_ON already done at .Lio_return, call 6604bfc86ceSHeiko Carstens # TRACE_IRQS_OFF to keep things symmetrical 6614bfc86ceSHeiko Carstens TRACE_IRQS_OFF 6624bfc86ceSHeiko Carstens brasl %r14,preempt_schedule_irq 6634bfc86ceSHeiko Carstens j .Lio_return 6644bfc86ceSHeiko Carstens#else 6654bfc86ceSHeiko Carstens j .Lio_restore 6664bfc86ceSHeiko Carstens#endif 6674bfc86ceSHeiko Carstens 6684bfc86ceSHeiko Carstens# 6694bfc86ceSHeiko Carstens# Need to do work before returning to userspace, switch to kernel stack 6704bfc86ceSHeiko Carstens# 6714bfc86ceSHeiko Carstens.Lio_work_user: 6724bfc86ceSHeiko Carstens lg %r1,__LC_KERNEL_STACK 6734bfc86ceSHeiko Carstens mvc STACK_FRAME_OVERHEAD(__PT_SIZE,%r1),0(%r11) 6744bfc86ceSHeiko Carstens xc __SF_BACKCHAIN(8,%r1),__SF_BACKCHAIN(%r1) 6754bfc86ceSHeiko Carstens la %r11,STACK_FRAME_OVERHEAD(%r1) 6764bfc86ceSHeiko Carstens lgr %r15,%r1 6774bfc86ceSHeiko Carstens 6784bfc86ceSHeiko Carstens# 6794bfc86ceSHeiko Carstens# One of the work bits is on. Find out which one. 6804bfc86ceSHeiko Carstens# 6814bfc86ceSHeiko Carstens.Lio_work_tif: 68283abeffbSHendrik Brueckner TSTMSK __LC_CPU_FLAGS,_CIF_MCCK_PENDING 6834bfc86ceSHeiko Carstens jo .Lio_mcck_pending 68483abeffbSHendrik Brueckner TSTMSK __TI_flags(%r12),_TIF_NEED_RESCHED 6854bfc86ceSHeiko Carstens jo .Lio_reschedule 6862f09ca60SMiroslav Benes#ifdef CONFIG_LIVEPATCH 6872f09ca60SMiroslav Benes TSTMSK __TI_flags(%r12),_TIF_PATCH_PENDING 6882f09ca60SMiroslav Benes jo .Lio_patch_pending 6892f09ca60SMiroslav Benes#endif 69083abeffbSHendrik Brueckner TSTMSK __TI_flags(%r12),_TIF_SIGPENDING 6914bfc86ceSHeiko Carstens jo .Lio_sigpending 69283abeffbSHendrik Brueckner TSTMSK __TI_flags(%r12),_TIF_NOTIFY_RESUME 6934bfc86ceSHeiko Carstens jo .Lio_notify_resume 694916cda1aSMartin Schwidefsky TSTMSK __TI_flags(%r12),_TIF_GUARDED_STORAGE 695916cda1aSMartin Schwidefsky jo .Lio_guarded_storage 69683abeffbSHendrik Brueckner TSTMSK __LC_CPU_FLAGS,_CIF_FPU 6979977e886SHendrik Brueckner jo .Lio_vxrs 698b5a882fcSHeiko Carstens TSTMSK __LC_CPU_FLAGS,(_CIF_ASCE_PRIMARY|_CIF_ASCE_SECONDARY) 699b5a882fcSHeiko Carstens jnz .Lio_asce 7004bfc86ceSHeiko Carstens j .Lio_return # beware of critical section cleanup 7014bfc86ceSHeiko Carstens 7024bfc86ceSHeiko Carstens# 7034bfc86ceSHeiko Carstens# _CIF_MCCK_PENDING is set, call handler 7044bfc86ceSHeiko Carstens# 7054bfc86ceSHeiko Carstens.Lio_mcck_pending: 7064bfc86ceSHeiko Carstens # TRACE_IRQS_ON already done at .Lio_return 7074bfc86ceSHeiko Carstens brasl %r14,s390_handle_mcck # TIF bit will be cleared by handler 7084bfc86ceSHeiko Carstens TRACE_IRQS_OFF 7094bfc86ceSHeiko Carstens j .Lio_return 7104bfc86ceSHeiko Carstens 7114bfc86ceSHeiko Carstens# 712b5a882fcSHeiko Carstens# _CIF_ASCE_PRIMARY and/or CIF_ASCE_SECONDARY set, load user space asce 7134bfc86ceSHeiko Carstens# 714b5a882fcSHeiko Carstens.Lio_asce: 715606aa4aaSHeiko Carstens ni __LC_CPU_FLAGS+7,255-_CIF_ASCE_PRIMARY 7164bfc86ceSHeiko Carstens lctlg %c1,%c1,__LC_USER_ASCE # load primary asce 717b5a882fcSHeiko Carstens TSTMSK __LC_CPU_FLAGS,_CIF_ASCE_SECONDARY 718b5a882fcSHeiko Carstens jz .Lio_return 719b5a882fcSHeiko Carstens larl %r14,.Lio_return 720b5a882fcSHeiko Carstens jg set_fs_fixup 7214bfc86ceSHeiko Carstens 7224bfc86ceSHeiko Carstens# 7239977e886SHendrik Brueckner# CIF_FPU is set, restore floating-point controls and floating-point registers. 7249977e886SHendrik Brueckner# 7259977e886SHendrik Brueckner.Lio_vxrs: 7269977e886SHendrik Brueckner larl %r14,.Lio_return 7279977e886SHendrik Brueckner jg load_fpu_regs 7289977e886SHendrik Brueckner 7299977e886SHendrik Brueckner# 730916cda1aSMartin Schwidefsky# _TIF_GUARDED_STORAGE is set, call guarded_storage_load 731916cda1aSMartin Schwidefsky# 732916cda1aSMartin Schwidefsky.Lio_guarded_storage: 733916cda1aSMartin Schwidefsky # TRACE_IRQS_ON already done at .Lio_return 734916cda1aSMartin Schwidefsky ssm __LC_SVC_NEW_PSW # reenable interrupts 735916cda1aSMartin Schwidefsky lgr %r2,%r11 # pass pointer to pt_regs 736916cda1aSMartin Schwidefsky brasl %r14,gs_load_bc_cb 737916cda1aSMartin Schwidefsky ssm __LC_PGM_NEW_PSW # disable I/O and ext. interrupts 738916cda1aSMartin Schwidefsky TRACE_IRQS_OFF 739916cda1aSMartin Schwidefsky j .Lio_return 740916cda1aSMartin Schwidefsky 741916cda1aSMartin Schwidefsky# 7424bfc86ceSHeiko Carstens# _TIF_NEED_RESCHED is set, call schedule 7434bfc86ceSHeiko Carstens# 7444bfc86ceSHeiko Carstens.Lio_reschedule: 7454bfc86ceSHeiko Carstens # TRACE_IRQS_ON already done at .Lio_return 7464bfc86ceSHeiko Carstens ssm __LC_SVC_NEW_PSW # reenable interrupts 7474bfc86ceSHeiko Carstens brasl %r14,schedule # call scheduler 7484bfc86ceSHeiko Carstens ssm __LC_PGM_NEW_PSW # disable I/O and ext. interrupts 7494bfc86ceSHeiko Carstens TRACE_IRQS_OFF 7504bfc86ceSHeiko Carstens j .Lio_return 7514bfc86ceSHeiko Carstens 7524bfc86ceSHeiko Carstens# 7532f09ca60SMiroslav Benes# _TIF_PATCH_PENDING is set, call klp_update_patch_state 7542f09ca60SMiroslav Benes# 7552f09ca60SMiroslav Benes#ifdef CONFIG_LIVEPATCH 7562f09ca60SMiroslav Benes.Lio_patch_pending: 7572f09ca60SMiroslav Benes lg %r2,__LC_CURRENT # pass pointer to task struct 7582f09ca60SMiroslav Benes larl %r14,.Lio_return 7592f09ca60SMiroslav Benes jg klp_update_patch_state 7602f09ca60SMiroslav Benes#endif 7612f09ca60SMiroslav Benes 7622f09ca60SMiroslav Benes# 7634bfc86ceSHeiko Carstens# _TIF_SIGPENDING or is set, call do_signal 7644bfc86ceSHeiko Carstens# 7654bfc86ceSHeiko Carstens.Lio_sigpending: 7664bfc86ceSHeiko Carstens # TRACE_IRQS_ON already done at .Lio_return 7674bfc86ceSHeiko Carstens ssm __LC_SVC_NEW_PSW # reenable interrupts 7684bfc86ceSHeiko Carstens lgr %r2,%r11 # pass pointer to pt_regs 7694bfc86ceSHeiko Carstens brasl %r14,do_signal 7704bfc86ceSHeiko Carstens ssm __LC_PGM_NEW_PSW # disable I/O and ext. interrupts 7714bfc86ceSHeiko Carstens TRACE_IRQS_OFF 7724bfc86ceSHeiko Carstens j .Lio_return 7734bfc86ceSHeiko Carstens 7744bfc86ceSHeiko Carstens# 7754bfc86ceSHeiko Carstens# _TIF_NOTIFY_RESUME or is set, call do_notify_resume 7764bfc86ceSHeiko Carstens# 7774bfc86ceSHeiko Carstens.Lio_notify_resume: 7784bfc86ceSHeiko Carstens # TRACE_IRQS_ON already done at .Lio_return 7794bfc86ceSHeiko Carstens ssm __LC_SVC_NEW_PSW # reenable interrupts 7804bfc86ceSHeiko Carstens lgr %r2,%r11 # pass pointer to pt_regs 7814bfc86ceSHeiko Carstens brasl %r14,do_notify_resume 7824bfc86ceSHeiko Carstens ssm __LC_PGM_NEW_PSW # disable I/O and ext. interrupts 7834bfc86ceSHeiko Carstens TRACE_IRQS_OFF 7844bfc86ceSHeiko Carstens j .Lio_return 7854bfc86ceSHeiko Carstens 7864bfc86ceSHeiko Carstens/* 7874bfc86ceSHeiko Carstens * External interrupt handler routine 7884bfc86ceSHeiko Carstens */ 7894bfc86ceSHeiko CarstensENTRY(ext_int_handler) 7904bfc86ceSHeiko Carstens STCK __LC_INT_CLOCK 7914bfc86ceSHeiko Carstens stpt __LC_ASYNC_ENTER_TIMER 7924bfc86ceSHeiko Carstens stmg %r8,%r15,__LC_SAVE_AREA_ASYNC 793d5c352cdSHeiko Carstens lg %r12,__LC_CURRENT 7949977e886SHendrik Brueckner larl %r13,cleanup_critical 7954bfc86ceSHeiko Carstens lmg %r8,%r9,__LC_EXT_OLD_PSW 7962acb94f4SMartin Schwidefsky SWITCH_ASYNC __LC_SAVE_AREA_ASYNC,__LC_ASYNC_ENTER_TIMER 7974bfc86ceSHeiko Carstens stmg %r0,%r7,__PT_R0(%r11) 7984bfc86ceSHeiko Carstens mvc __PT_R8(64,%r11),__LC_SAVE_AREA_ASYNC 7994bfc86ceSHeiko Carstens stmg %r8,%r9,__PT_PSW(%r11) 8004bfc86ceSHeiko Carstens lghi %r1,__LC_EXT_PARAMS2 8014bfc86ceSHeiko Carstens mvc __PT_INT_CODE(4,%r11),__LC_EXT_CPU_ADDR 8024bfc86ceSHeiko Carstens mvc __PT_INT_PARM(4,%r11),__LC_EXT_PARAMS 8034bfc86ceSHeiko Carstens mvc __PT_INT_PARM_LONG(8,%r11),0(%r1) 8044bfc86ceSHeiko Carstens xc __PT_FLAGS(8,%r11),__PT_FLAGS(%r11) 805db7e007fSHeiko Carstens TSTMSK __LC_CPU_FLAGS,_CIF_IGNORE_IRQ 806db7e007fSHeiko Carstens jo .Lio_restore 8074bfc86ceSHeiko Carstens TRACE_IRQS_OFF 8084bfc86ceSHeiko Carstens xc __SF_BACKCHAIN(8,%r15),__SF_BACKCHAIN(%r15) 8094bfc86ceSHeiko Carstens lgr %r2,%r11 # pass pointer to pt_regs 8104bfc86ceSHeiko Carstens lghi %r3,EXT_INTERRUPT 8114bfc86ceSHeiko Carstens brasl %r14,do_IRQ 8124bfc86ceSHeiko Carstens j .Lio_return 8134bfc86ceSHeiko Carstens 8144bfc86ceSHeiko Carstens/* 8154bfc86ceSHeiko Carstens * Load idle PSW. The second "half" of this function is in .Lcleanup_idle. 8164bfc86ceSHeiko Carstens */ 8174bfc86ceSHeiko CarstensENTRY(psw_idle) 8184bfc86ceSHeiko Carstens stg %r3,__SF_EMPTY(%r15) 8194bfc86ceSHeiko Carstens larl %r1,.Lpsw_idle_lpsw+4 8204bfc86ceSHeiko Carstens stg %r1,__SF_EMPTY+8(%r15) 82172d38b19SMartin Schwidefsky#ifdef CONFIG_SMP 82272d38b19SMartin Schwidefsky larl %r1,smp_cpu_mtid 82372d38b19SMartin Schwidefsky llgf %r1,0(%r1) 82472d38b19SMartin Schwidefsky ltgr %r1,%r1 82572d38b19SMartin Schwidefsky jz .Lpsw_idle_stcctm 82672d38b19SMartin Schwidefsky .insn rsy,0xeb0000000017,%r1,5,__SF_EMPTY+16(%r15) 82772d38b19SMartin Schwidefsky.Lpsw_idle_stcctm: 82872d38b19SMartin Schwidefsky#endif 829419123f9SMartin Schwidefsky oi __LC_CPU_FLAGS+7,_CIF_ENABLED_WAIT 8304bfc86ceSHeiko Carstens STCK __CLOCK_IDLE_ENTER(%r2) 8314bfc86ceSHeiko Carstens stpt __TIMER_IDLE_ENTER(%r2) 8324bfc86ceSHeiko Carstens.Lpsw_idle_lpsw: 8334bfc86ceSHeiko Carstens lpswe __SF_EMPTY(%r15) 8344bfc86ceSHeiko Carstens br %r14 8354bfc86ceSHeiko Carstens.Lpsw_idle_end: 8364bfc86ceSHeiko Carstens 837b5510d9bSHendrik Brueckner/* 838b5510d9bSHendrik Brueckner * Store floating-point controls and floating-point or vector register 839b5510d9bSHendrik Brueckner * depending whether the vector facility is available. A critical section 840b5510d9bSHendrik Brueckner * cleanup assures that the registers are stored even if interrupted for 841b5510d9bSHendrik Brueckner * some other work. The CIF_FPU flag is set to trigger a lazy restore 842b5510d9bSHendrik Brueckner * of the register contents at return from io or a system call. 8439977e886SHendrik Brueckner */ 8449977e886SHendrik BruecknerENTRY(save_fpu_regs) 845d0164ee2SHendrik Brueckner lg %r2,__LC_CURRENT 846d0164ee2SHendrik Brueckner aghi %r2,__TASK_thread 84783abeffbSHendrik Brueckner TSTMSK __LC_CPU_FLAGS,_CIF_FPU 8489977e886SHendrik Brueckner bor %r14 849d0164ee2SHendrik Brueckner stfpc __THREAD_FPU_fpc(%r2) 850d0164ee2SHendrik Brueckner lg %r3,__THREAD_FPU_regs(%r2) 85183abeffbSHendrik Brueckner TSTMSK __LC_MACHINE_FLAGS,MACHINE_FLAG_VX 8529977e886SHendrik Brueckner jz .Lsave_fpu_regs_fp # no -> store FP regs 8539977e886SHendrik Brueckner VSTM %v0,%v15,0,%r3 # vstm 0,15,0(3) 8549977e886SHendrik Brueckner VSTM %v16,%v31,256,%r3 # vstm 16,31,256(3) 8559977e886SHendrik Brueckner j .Lsave_fpu_regs_done # -> set CIF_FPU flag 8569977e886SHendrik Brueckner.Lsave_fpu_regs_fp: 8579977e886SHendrik Brueckner std 0,0(%r3) 8589977e886SHendrik Brueckner std 1,8(%r3) 8599977e886SHendrik Brueckner std 2,16(%r3) 8609977e886SHendrik Brueckner std 3,24(%r3) 8619977e886SHendrik Brueckner std 4,32(%r3) 8629977e886SHendrik Brueckner std 5,40(%r3) 8639977e886SHendrik Brueckner std 6,48(%r3) 8649977e886SHendrik Brueckner std 7,56(%r3) 8659977e886SHendrik Brueckner std 8,64(%r3) 8669977e886SHendrik Brueckner std 9,72(%r3) 8679977e886SHendrik Brueckner std 10,80(%r3) 8689977e886SHendrik Brueckner std 11,88(%r3) 8699977e886SHendrik Brueckner std 12,96(%r3) 8709977e886SHendrik Brueckner std 13,104(%r3) 8719977e886SHendrik Brueckner std 14,112(%r3) 8729977e886SHendrik Brueckner std 15,120(%r3) 8739977e886SHendrik Brueckner.Lsave_fpu_regs_done: 8749977e886SHendrik Brueckner oi __LC_CPU_FLAGS+7,_CIF_FPU 8759977e886SHendrik Brueckner br %r14 8769977e886SHendrik Brueckner.Lsave_fpu_regs_end: 877711f5df7SAl Viro#if IS_ENABLED(CONFIG_KVM) 878711f5df7SAl ViroEXPORT_SYMBOL(save_fpu_regs) 879711f5df7SAl Viro#endif 8809977e886SHendrik Brueckner 881b5510d9bSHendrik Brueckner/* 882b5510d9bSHendrik Brueckner * Load floating-point controls and floating-point or vector registers. 883b5510d9bSHendrik Brueckner * A critical section cleanup assures that the register contents are 884b5510d9bSHendrik Brueckner * loaded even if interrupted for some other work. 8859977e886SHendrik Brueckner * 8869977e886SHendrik Brueckner * There are special calling conventions to fit into sysc and io return work: 8879977e886SHendrik Brueckner * %r15: <kernel stack> 8889977e886SHendrik Brueckner * The function requires: 889b5510d9bSHendrik Brueckner * %r4 8909977e886SHendrik Brueckner */ 8919977e886SHendrik Bruecknerload_fpu_regs: 892d0164ee2SHendrik Brueckner lg %r4,__LC_CURRENT 893d0164ee2SHendrik Brueckner aghi %r4,__TASK_thread 89483abeffbSHendrik Brueckner TSTMSK __LC_CPU_FLAGS,_CIF_FPU 8959977e886SHendrik Brueckner bnor %r14 896d0164ee2SHendrik Brueckner lfpc __THREAD_FPU_fpc(%r4) 89783abeffbSHendrik Brueckner TSTMSK __LC_MACHINE_FLAGS,MACHINE_FLAG_VX 898d0164ee2SHendrik Brueckner lg %r4,__THREAD_FPU_regs(%r4) # %r4 <- reg save area 899b5510d9bSHendrik Brueckner jz .Lload_fpu_regs_fp # -> no VX, load FP regs 9009977e886SHendrik Brueckner VLM %v0,%v15,0,%r4 9019977e886SHendrik Brueckner VLM %v16,%v31,256,%r4 9029977e886SHendrik Brueckner j .Lload_fpu_regs_done 9039977e886SHendrik Brueckner.Lload_fpu_regs_fp: 9049977e886SHendrik Brueckner ld 0,0(%r4) 9059977e886SHendrik Brueckner ld 1,8(%r4) 9069977e886SHendrik Brueckner ld 2,16(%r4) 9079977e886SHendrik Brueckner ld 3,24(%r4) 9089977e886SHendrik Brueckner ld 4,32(%r4) 9099977e886SHendrik Brueckner ld 5,40(%r4) 9109977e886SHendrik Brueckner ld 6,48(%r4) 9119977e886SHendrik Brueckner ld 7,56(%r4) 9129977e886SHendrik Brueckner ld 8,64(%r4) 9139977e886SHendrik Brueckner ld 9,72(%r4) 9149977e886SHendrik Brueckner ld 10,80(%r4) 9159977e886SHendrik Brueckner ld 11,88(%r4) 9169977e886SHendrik Brueckner ld 12,96(%r4) 9179977e886SHendrik Brueckner ld 13,104(%r4) 9189977e886SHendrik Brueckner ld 14,112(%r4) 9199977e886SHendrik Brueckner ld 15,120(%r4) 9209977e886SHendrik Brueckner.Lload_fpu_regs_done: 9219977e886SHendrik Brueckner ni __LC_CPU_FLAGS+7,255-_CIF_FPU 9229977e886SHendrik Brueckner br %r14 9239977e886SHendrik Brueckner.Lload_fpu_regs_end: 9249977e886SHendrik Brueckner 9254bfc86ceSHeiko Carstens.L__critical_end: 9264bfc86ceSHeiko Carstens 9274bfc86ceSHeiko Carstens/* 9284bfc86ceSHeiko Carstens * Machine check handler routines 9294bfc86ceSHeiko Carstens */ 9304bfc86ceSHeiko CarstensENTRY(mcck_int_handler) 9314bfc86ceSHeiko Carstens STCK __LC_MCCK_CLOCK 9324bfc86ceSHeiko Carstens la %r1,4095 # revalidate r1 9334bfc86ceSHeiko Carstens spt __LC_CPU_TIMER_SAVE_AREA-4095(%r1) # revalidate cpu timer 9344bfc86ceSHeiko Carstens lmg %r0,%r15,__LC_GPREGS_SAVE_AREA-4095(%r1)# revalidate gprs 935d5c352cdSHeiko Carstens lg %r12,__LC_CURRENT 9369977e886SHendrik Brueckner larl %r13,cleanup_critical 9374bfc86ceSHeiko Carstens lmg %r8,%r9,__LC_MCK_OLD_PSW 93883abeffbSHendrik Brueckner TSTMSK __LC_MCCK_CODE,MCCK_CODE_SYSTEM_DAMAGE 9394bfc86ceSHeiko Carstens jo .Lmcck_panic # yes -> rest of mcck code invalid 9404bfc86ceSHeiko Carstens lghi %r14,__LC_CPU_TIMER_SAVE_AREA 9414bfc86ceSHeiko Carstens mvc __LC_MCCK_ENTER_TIMER(8),0(%r14) 94283abeffbSHendrik Brueckner TSTMSK __LC_MCCK_CODE,MCCK_CODE_CPU_TIMER_VALID 9434bfc86ceSHeiko Carstens jo 3f 9444bfc86ceSHeiko Carstens la %r14,__LC_SYNC_ENTER_TIMER 9454bfc86ceSHeiko Carstens clc 0(8,%r14),__LC_ASYNC_ENTER_TIMER 9464bfc86ceSHeiko Carstens jl 0f 9474bfc86ceSHeiko Carstens la %r14,__LC_ASYNC_ENTER_TIMER 9484bfc86ceSHeiko Carstens0: clc 0(8,%r14),__LC_EXIT_TIMER 9494bfc86ceSHeiko Carstens jl 1f 9504bfc86ceSHeiko Carstens la %r14,__LC_EXIT_TIMER 9514bfc86ceSHeiko Carstens1: clc 0(8,%r14),__LC_LAST_UPDATE_TIMER 9524bfc86ceSHeiko Carstens jl 2f 9534bfc86ceSHeiko Carstens la %r14,__LC_LAST_UPDATE_TIMER 9544bfc86ceSHeiko Carstens2: spt 0(%r14) 9554bfc86ceSHeiko Carstens mvc __LC_MCCK_ENTER_TIMER(8),0(%r14) 95683abeffbSHendrik Brueckner3: TSTMSK __LC_MCCK_CODE,(MCCK_CODE_PSW_MWP_VALID|MCCK_CODE_PSW_IA_VALID) 9574bfc86ceSHeiko Carstens jno .Lmcck_panic # no -> skip cleanup critical 9582acb94f4SMartin Schwidefsky SWITCH_ASYNC __LC_GPREGS_SAVE_AREA+64,__LC_MCCK_ENTER_TIMER 9594bfc86ceSHeiko Carstens.Lmcck_skip: 9604bfc86ceSHeiko Carstens lghi %r14,__LC_GPREGS_SAVE_AREA+64 9614bfc86ceSHeiko Carstens stmg %r0,%r7,__PT_R0(%r11) 9624bfc86ceSHeiko Carstens mvc __PT_R8(64,%r11),0(%r14) 9634bfc86ceSHeiko Carstens stmg %r8,%r9,__PT_PSW(%r11) 9644bfc86ceSHeiko Carstens xc __PT_FLAGS(8,%r11),__PT_FLAGS(%r11) 9654bfc86ceSHeiko Carstens xc __SF_BACKCHAIN(8,%r15),__SF_BACKCHAIN(%r15) 9664bfc86ceSHeiko Carstens lgr %r2,%r11 # pass pointer to pt_regs 9674bfc86ceSHeiko Carstens brasl %r14,s390_do_machine_check 9684bfc86ceSHeiko Carstens tm __PT_PSW+1(%r11),0x01 # returning to user ? 9694bfc86ceSHeiko Carstens jno .Lmcck_return 9704bfc86ceSHeiko Carstens lg %r1,__LC_KERNEL_STACK # switch to kernel stack 9714bfc86ceSHeiko Carstens mvc STACK_FRAME_OVERHEAD(__PT_SIZE,%r1),0(%r11) 9724bfc86ceSHeiko Carstens xc __SF_BACKCHAIN(8,%r1),__SF_BACKCHAIN(%r1) 9734bfc86ceSHeiko Carstens la %r11,STACK_FRAME_OVERHEAD(%r1) 9744bfc86ceSHeiko Carstens lgr %r15,%r1 9754bfc86ceSHeiko Carstens ssm __LC_PGM_NEW_PSW # turn dat on, keep irqs off 97683abeffbSHendrik Brueckner TSTMSK __LC_CPU_FLAGS,_CIF_MCCK_PENDING 9774bfc86ceSHeiko Carstens jno .Lmcck_return 9784bfc86ceSHeiko Carstens TRACE_IRQS_OFF 9794bfc86ceSHeiko Carstens brasl %r14,s390_handle_mcck 9804bfc86ceSHeiko Carstens TRACE_IRQS_ON 9814bfc86ceSHeiko Carstens.Lmcck_return: 9824bfc86ceSHeiko Carstens lg %r14,__LC_VDSO_PER_CPU 9834bfc86ceSHeiko Carstens lmg %r0,%r10,__PT_R0(%r11) 9844bfc86ceSHeiko Carstens mvc __LC_RETURN_MCCK_PSW(16),__PT_PSW(%r11) # move return PSW 9854bfc86ceSHeiko Carstens tm __LC_RETURN_MCCK_PSW+1,0x01 # returning to user ? 9864bfc86ceSHeiko Carstens jno 0f 9874bfc86ceSHeiko Carstens stpt __LC_EXIT_TIMER 9884bfc86ceSHeiko Carstens mvc __VDSO_ECTG_BASE(16,%r14),__LC_EXIT_TIMER 9894bfc86ceSHeiko Carstens0: lmg %r11,%r15,__PT_R11(%r11) 9904bfc86ceSHeiko Carstens lpswe __LC_RETURN_MCCK_PSW 9914bfc86ceSHeiko Carstens 9924bfc86ceSHeiko Carstens.Lmcck_panic: 9934bfc86ceSHeiko Carstens lg %r15,__LC_PANIC_STACK 994ce4dda3fSMartin Schwidefsky la %r11,STACK_FRAME_OVERHEAD(%r15) 9954bfc86ceSHeiko Carstens j .Lmcck_skip 9964bfc86ceSHeiko Carstens 9974bfc86ceSHeiko Carstens# 9984bfc86ceSHeiko Carstens# PSW restart interrupt handler 9994bfc86ceSHeiko Carstens# 10004bfc86ceSHeiko CarstensENTRY(restart_int_handler) 1001e22cf8caSChristian Borntraeger TSTMSK __LC_MACHINE_FLAGS,MACHINE_FLAG_LPP 1002e22cf8caSChristian Borntraeger jz 0f 1003e22cf8caSChristian Borntraeger .insn s,0xb2800000,__LC_LPP 1004e22cf8caSChristian Borntraeger0: stg %r15,__LC_SAVE_AREA_RESTART 10054bfc86ceSHeiko Carstens lg %r15,__LC_RESTART_STACK 10064bfc86ceSHeiko Carstens aghi %r15,-__PT_SIZE # create pt_regs on stack 10074bfc86ceSHeiko Carstens xc 0(__PT_SIZE,%r15),0(%r15) 10084bfc86ceSHeiko Carstens stmg %r0,%r14,__PT_R0(%r15) 10094bfc86ceSHeiko Carstens mvc __PT_R15(8,%r15),__LC_SAVE_AREA_RESTART 10104bfc86ceSHeiko Carstens mvc __PT_PSW(16,%r15),__LC_RST_OLD_PSW # store restart old psw 10114bfc86ceSHeiko Carstens aghi %r15,-STACK_FRAME_OVERHEAD # create stack frame on stack 10124bfc86ceSHeiko Carstens xc 0(STACK_FRAME_OVERHEAD,%r15),0(%r15) 10134bfc86ceSHeiko Carstens lg %r1,__LC_RESTART_FN # load fn, parm & source cpu 10144bfc86ceSHeiko Carstens lg %r2,__LC_RESTART_DATA 10154bfc86ceSHeiko Carstens lg %r3,__LC_RESTART_SOURCE 10164bfc86ceSHeiko Carstens ltgr %r3,%r3 # test source cpu address 10174bfc86ceSHeiko Carstens jm 1f # negative -> skip source stop 10184bfc86ceSHeiko Carstens0: sigp %r4,%r3,SIGP_SENSE # sigp sense to source cpu 10194bfc86ceSHeiko Carstens brc 10,0b # wait for status stored 10204bfc86ceSHeiko Carstens1: basr %r14,%r1 # call function 10214bfc86ceSHeiko Carstens stap __SF_EMPTY(%r15) # store cpu address 10224bfc86ceSHeiko Carstens llgh %r3,__SF_EMPTY(%r15) 10234bfc86ceSHeiko Carstens2: sigp %r4,%r3,SIGP_STOP # sigp stop to current cpu 10244bfc86ceSHeiko Carstens brc 2,2b 10254bfc86ceSHeiko Carstens3: j 3b 10264bfc86ceSHeiko Carstens 10274bfc86ceSHeiko Carstens .section .kprobes.text, "ax" 10284bfc86ceSHeiko Carstens 10294bfc86ceSHeiko Carstens#ifdef CONFIG_CHECK_STACK 10304bfc86ceSHeiko Carstens/* 10314bfc86ceSHeiko Carstens * The synchronous or the asynchronous stack overflowed. We are dead. 10324bfc86ceSHeiko Carstens * No need to properly save the registers, we are going to panic anyway. 10334bfc86ceSHeiko Carstens * Setup a pt_regs so that show_trace can provide a good call trace. 10344bfc86ceSHeiko Carstens */ 10354bfc86ceSHeiko Carstensstack_overflow: 10364bfc86ceSHeiko Carstens lg %r15,__LC_PANIC_STACK # change to panic stack 10374bfc86ceSHeiko Carstens la %r11,STACK_FRAME_OVERHEAD(%r15) 10384bfc86ceSHeiko Carstens stmg %r0,%r7,__PT_R0(%r11) 10394bfc86ceSHeiko Carstens stmg %r8,%r9,__PT_PSW(%r11) 10404bfc86ceSHeiko Carstens mvc __PT_R8(64,%r11),0(%r14) 10414bfc86ceSHeiko Carstens stg %r10,__PT_ORIG_GPR2(%r11) # store last break to orig_gpr2 10424bfc86ceSHeiko Carstens xc __SF_BACKCHAIN(8,%r15),__SF_BACKCHAIN(%r15) 10434bfc86ceSHeiko Carstens lgr %r2,%r11 # pass pointer to pt_regs 10444bfc86ceSHeiko Carstens jg kernel_stack_overflow 10454bfc86ceSHeiko Carstens#endif 10464bfc86ceSHeiko Carstens 10474bfc86ceSHeiko Carstenscleanup_critical: 1048d0fc4107SMartin Schwidefsky#if IS_ENABLED(CONFIG_KVM) 1049d0fc4107SMartin Schwidefsky clg %r9,BASED(.Lcleanup_table_sie) # .Lsie_gmap 1050d0fc4107SMartin Schwidefsky jl 0f 1051d0fc4107SMartin Schwidefsky clg %r9,BASED(.Lcleanup_table_sie+8)# .Lsie_done 1052d0fc4107SMartin Schwidefsky jl .Lcleanup_sie 1053d0fc4107SMartin Schwidefsky#endif 10544bfc86ceSHeiko Carstens clg %r9,BASED(.Lcleanup_table) # system_call 10554bfc86ceSHeiko Carstens jl 0f 10564bfc86ceSHeiko Carstens clg %r9,BASED(.Lcleanup_table+8) # .Lsysc_do_svc 10574bfc86ceSHeiko Carstens jl .Lcleanup_system_call 10584bfc86ceSHeiko Carstens clg %r9,BASED(.Lcleanup_table+16) # .Lsysc_tif 10594bfc86ceSHeiko Carstens jl 0f 10604bfc86ceSHeiko Carstens clg %r9,BASED(.Lcleanup_table+24) # .Lsysc_restore 10614bfc86ceSHeiko Carstens jl .Lcleanup_sysc_tif 10624bfc86ceSHeiko Carstens clg %r9,BASED(.Lcleanup_table+32) # .Lsysc_done 10634bfc86ceSHeiko Carstens jl .Lcleanup_sysc_restore 10644bfc86ceSHeiko Carstens clg %r9,BASED(.Lcleanup_table+40) # .Lio_tif 10654bfc86ceSHeiko Carstens jl 0f 10664bfc86ceSHeiko Carstens clg %r9,BASED(.Lcleanup_table+48) # .Lio_restore 10674bfc86ceSHeiko Carstens jl .Lcleanup_io_tif 10684bfc86ceSHeiko Carstens clg %r9,BASED(.Lcleanup_table+56) # .Lio_done 10694bfc86ceSHeiko Carstens jl .Lcleanup_io_restore 10704bfc86ceSHeiko Carstens clg %r9,BASED(.Lcleanup_table+64) # psw_idle 10714bfc86ceSHeiko Carstens jl 0f 10724bfc86ceSHeiko Carstens clg %r9,BASED(.Lcleanup_table+72) # .Lpsw_idle_end 10734bfc86ceSHeiko Carstens jl .Lcleanup_idle 10749977e886SHendrik Brueckner clg %r9,BASED(.Lcleanup_table+80) # save_fpu_regs 10759977e886SHendrik Brueckner jl 0f 10769977e886SHendrik Brueckner clg %r9,BASED(.Lcleanup_table+88) # .Lsave_fpu_regs_end 10779977e886SHendrik Brueckner jl .Lcleanup_save_fpu_regs 10789977e886SHendrik Brueckner clg %r9,BASED(.Lcleanup_table+96) # load_fpu_regs 10799977e886SHendrik Brueckner jl 0f 10809977e886SHendrik Brueckner clg %r9,BASED(.Lcleanup_table+104) # .Lload_fpu_regs_end 10819977e886SHendrik Brueckner jl .Lcleanup_load_fpu_regs 10824bfc86ceSHeiko Carstens0: br %r14 10834bfc86ceSHeiko Carstens 1084d0fc4107SMartin Schwidefsky .align 8 1085d0fc4107SMartin Schwidefsky.Lcleanup_table: 1086d0fc4107SMartin Schwidefsky .quad system_call 1087d0fc4107SMartin Schwidefsky .quad .Lsysc_do_svc 1088d0fc4107SMartin Schwidefsky .quad .Lsysc_tif 1089d0fc4107SMartin Schwidefsky .quad .Lsysc_restore 1090d0fc4107SMartin Schwidefsky .quad .Lsysc_done 1091d0fc4107SMartin Schwidefsky .quad .Lio_tif 1092d0fc4107SMartin Schwidefsky .quad .Lio_restore 1093d0fc4107SMartin Schwidefsky .quad .Lio_done 1094d0fc4107SMartin Schwidefsky .quad psw_idle 1095d0fc4107SMartin Schwidefsky .quad .Lpsw_idle_end 1096d0fc4107SMartin Schwidefsky .quad save_fpu_regs 1097d0fc4107SMartin Schwidefsky .quad .Lsave_fpu_regs_end 1098d0fc4107SMartin Schwidefsky .quad load_fpu_regs 1099d0fc4107SMartin Schwidefsky .quad .Lload_fpu_regs_end 1100d0fc4107SMartin Schwidefsky 1101d0fc4107SMartin Schwidefsky#if IS_ENABLED(CONFIG_KVM) 1102d0fc4107SMartin Schwidefsky.Lcleanup_table_sie: 1103d0fc4107SMartin Schwidefsky .quad .Lsie_gmap 1104d0fc4107SMartin Schwidefsky .quad .Lsie_done 1105d0fc4107SMartin Schwidefsky 1106d0fc4107SMartin Schwidefsky.Lcleanup_sie: 1107d0fc4107SMartin Schwidefsky lg %r9,__SF_EMPTY(%r15) # get control block pointer 1108e22cf8caSChristian Borntraeger ni __SIE_PROG0C+3(%r9),0xfe # no longer in SIE 1109d0fc4107SMartin Schwidefsky lctlg %c1,%c1,__LC_USER_ASCE # load primary asce 1110d0fc4107SMartin Schwidefsky larl %r9,sie_exit # skip forward to sie_exit 1111d0fc4107SMartin Schwidefsky br %r14 1112d0fc4107SMartin Schwidefsky#endif 11134bfc86ceSHeiko Carstens 11144bfc86ceSHeiko Carstens.Lcleanup_system_call: 11154bfc86ceSHeiko Carstens # check if stpt has been executed 11164bfc86ceSHeiko Carstens clg %r9,BASED(.Lcleanup_system_call_insn) 11174bfc86ceSHeiko Carstens jh 0f 11184bfc86ceSHeiko Carstens mvc __LC_SYNC_ENTER_TIMER(8),__LC_ASYNC_ENTER_TIMER 11194bfc86ceSHeiko Carstens cghi %r11,__LC_SAVE_AREA_ASYNC 11204bfc86ceSHeiko Carstens je 0f 11214bfc86ceSHeiko Carstens mvc __LC_SYNC_ENTER_TIMER(8),__LC_MCCK_ENTER_TIMER 11224bfc86ceSHeiko Carstens0: # check if stmg has been executed 11234bfc86ceSHeiko Carstens clg %r9,BASED(.Lcleanup_system_call_insn+8) 11244bfc86ceSHeiko Carstens jh 0f 11254bfc86ceSHeiko Carstens mvc __LC_SAVE_AREA_SYNC(64),0(%r11) 11264bfc86ceSHeiko Carstens0: # check if base register setup + TIF bit load has been done 11274bfc86ceSHeiko Carstens clg %r9,BASED(.Lcleanup_system_call_insn+16) 11284bfc86ceSHeiko Carstens jhe 0f 112934525e1fSMartin Schwidefsky # set up saved register r12 task struct pointer 113034525e1fSMartin Schwidefsky stg %r12,32(%r11) 113134525e1fSMartin Schwidefsky # set up saved register r13 __TASK_thread offset 113234525e1fSMartin Schwidefsky mvc 40(8,%r11),BASED(.Lcleanup_system_call_const) 11334bfc86ceSHeiko Carstens0: # check if the user time update has been done 11344bfc86ceSHeiko Carstens clg %r9,BASED(.Lcleanup_system_call_insn+24) 11354bfc86ceSHeiko Carstens jh 0f 11364bfc86ceSHeiko Carstens lg %r15,__LC_EXIT_TIMER 11374bfc86ceSHeiko Carstens slg %r15,__LC_SYNC_ENTER_TIMER 11384bfc86ceSHeiko Carstens alg %r15,__LC_USER_TIMER 11394bfc86ceSHeiko Carstens stg %r15,__LC_USER_TIMER 11404bfc86ceSHeiko Carstens0: # check if the system time update has been done 11414bfc86ceSHeiko Carstens clg %r9,BASED(.Lcleanup_system_call_insn+32) 11424bfc86ceSHeiko Carstens jh 0f 11434bfc86ceSHeiko Carstens lg %r15,__LC_LAST_UPDATE_TIMER 11444bfc86ceSHeiko Carstens slg %r15,__LC_EXIT_TIMER 11454bfc86ceSHeiko Carstens alg %r15,__LC_SYSTEM_TIMER 11464bfc86ceSHeiko Carstens stg %r15,__LC_SYSTEM_TIMER 11474bfc86ceSHeiko Carstens0: # update accounting time stamp 11484bfc86ceSHeiko Carstens mvc __LC_LAST_UPDATE_TIMER(8),__LC_SYNC_ENTER_TIMER 114934525e1fSMartin Schwidefsky # set up saved register r11 11504bfc86ceSHeiko Carstens lg %r15,__LC_KERNEL_STACK 11514bfc86ceSHeiko Carstens la %r9,STACK_FRAME_OVERHEAD(%r15) 11524bfc86ceSHeiko Carstens stg %r9,24(%r11) # r11 pt_regs pointer 11534bfc86ceSHeiko Carstens # fill pt_regs 11544bfc86ceSHeiko Carstens mvc __PT_R8(64,%r9),__LC_SAVE_AREA_SYNC 11554bfc86ceSHeiko Carstens stmg %r0,%r7,__PT_R0(%r9) 11564bfc86ceSHeiko Carstens mvc __PT_PSW(16,%r9),__LC_SVC_OLD_PSW 11574bfc86ceSHeiko Carstens mvc __PT_INT_CODE(4,%r9),__LC_SVC_ILC 11584bfc86ceSHeiko Carstens xc __PT_FLAGS(8,%r9),__PT_FLAGS(%r9) 11594bfc86ceSHeiko Carstens mvi __PT_FLAGS+7(%r9),_PIF_SYSCALL 11604bfc86ceSHeiko Carstens # setup saved register r15 11614bfc86ceSHeiko Carstens stg %r15,56(%r11) # r15 stack pointer 11624bfc86ceSHeiko Carstens # set new psw address and exit 11634bfc86ceSHeiko Carstens larl %r9,.Lsysc_do_svc 11644bfc86ceSHeiko Carstens br %r14 11654bfc86ceSHeiko Carstens.Lcleanup_system_call_insn: 11664bfc86ceSHeiko Carstens .quad system_call 11674bfc86ceSHeiko Carstens .quad .Lsysc_stmg 11684bfc86ceSHeiko Carstens .quad .Lsysc_per 1169a359bb11SMartin Schwidefsky .quad .Lsysc_vtime+36 11704bfc86ceSHeiko Carstens .quad .Lsysc_vtime+42 117134525e1fSMartin Schwidefsky.Lcleanup_system_call_const: 117234525e1fSMartin Schwidefsky .quad __TASK_thread 11734bfc86ceSHeiko Carstens 11744bfc86ceSHeiko Carstens.Lcleanup_sysc_tif: 11754bfc86ceSHeiko Carstens larl %r9,.Lsysc_tif 11764bfc86ceSHeiko Carstens br %r14 11774bfc86ceSHeiko Carstens 11784bfc86ceSHeiko Carstens.Lcleanup_sysc_restore: 1179*07a63cbeSMartin Schwidefsky # check if stpt has been executed 11804bfc86ceSHeiko Carstens clg %r9,BASED(.Lcleanup_sysc_restore_insn) 1181*07a63cbeSMartin Schwidefsky jh 0f 1182*07a63cbeSMartin Schwidefsky mvc __LC_EXIT_TIMER(8),__LC_ASYNC_ENTER_TIMER 1183*07a63cbeSMartin Schwidefsky cghi %r11,__LC_SAVE_AREA_ASYNC 11844bfc86ceSHeiko Carstens je 0f 1185*07a63cbeSMartin Schwidefsky mvc __LC_EXIT_TIMER(8),__LC_MCCK_ENTER_TIMER 1186*07a63cbeSMartin Schwidefsky0: clg %r9,BASED(.Lcleanup_sysc_restore_insn+8) 1187*07a63cbeSMartin Schwidefsky je 1f 11884bfc86ceSHeiko Carstens lg %r9,24(%r11) # get saved pointer to pt_regs 11894bfc86ceSHeiko Carstens mvc __LC_RETURN_PSW(16),__PT_PSW(%r9) 11904bfc86ceSHeiko Carstens mvc 0(64,%r11),__PT_R8(%r9) 11914bfc86ceSHeiko Carstens lmg %r0,%r7,__PT_R0(%r9) 1192*07a63cbeSMartin Schwidefsky1: lmg %r8,%r9,__LC_RETURN_PSW 11934bfc86ceSHeiko Carstens br %r14 11944bfc86ceSHeiko Carstens.Lcleanup_sysc_restore_insn: 1195*07a63cbeSMartin Schwidefsky .quad .Lsysc_exit_timer 11964bfc86ceSHeiko Carstens .quad .Lsysc_done - 4 11974bfc86ceSHeiko Carstens 11984bfc86ceSHeiko Carstens.Lcleanup_io_tif: 11994bfc86ceSHeiko Carstens larl %r9,.Lio_tif 12004bfc86ceSHeiko Carstens br %r14 12014bfc86ceSHeiko Carstens 12024bfc86ceSHeiko Carstens.Lcleanup_io_restore: 1203*07a63cbeSMartin Schwidefsky # check if stpt has been executed 12044bfc86ceSHeiko Carstens clg %r9,BASED(.Lcleanup_io_restore_insn) 1205*07a63cbeSMartin Schwidefsky jh 0f 1206*07a63cbeSMartin Schwidefsky mvc __LC_EXIT_TIMER(8),__LC_MCCK_ENTER_TIMER 1207*07a63cbeSMartin Schwidefsky0: clg %r9,BASED(.Lcleanup_io_restore_insn+8) 1208*07a63cbeSMartin Schwidefsky je 1f 12094bfc86ceSHeiko Carstens lg %r9,24(%r11) # get saved r11 pointer to pt_regs 12104bfc86ceSHeiko Carstens mvc __LC_RETURN_PSW(16),__PT_PSW(%r9) 12114bfc86ceSHeiko Carstens mvc 0(64,%r11),__PT_R8(%r9) 12124bfc86ceSHeiko Carstens lmg %r0,%r7,__PT_R0(%r9) 1213*07a63cbeSMartin Schwidefsky1: lmg %r8,%r9,__LC_RETURN_PSW 12144bfc86ceSHeiko Carstens br %r14 12154bfc86ceSHeiko Carstens.Lcleanup_io_restore_insn: 1216*07a63cbeSMartin Schwidefsky .quad .Lio_exit_timer 12174bfc86ceSHeiko Carstens .quad .Lio_done - 4 12184bfc86ceSHeiko Carstens 12194bfc86ceSHeiko Carstens.Lcleanup_idle: 1220419123f9SMartin Schwidefsky ni __LC_CPU_FLAGS+7,255-_CIF_ENABLED_WAIT 12214bfc86ceSHeiko Carstens # copy interrupt clock & cpu timer 12224bfc86ceSHeiko Carstens mvc __CLOCK_IDLE_EXIT(8,%r2),__LC_INT_CLOCK 12234bfc86ceSHeiko Carstens mvc __TIMER_IDLE_EXIT(8,%r2),__LC_ASYNC_ENTER_TIMER 12244bfc86ceSHeiko Carstens cghi %r11,__LC_SAVE_AREA_ASYNC 12254bfc86ceSHeiko Carstens je 0f 12264bfc86ceSHeiko Carstens mvc __CLOCK_IDLE_EXIT(8,%r2),__LC_MCCK_CLOCK 12274bfc86ceSHeiko Carstens mvc __TIMER_IDLE_EXIT(8,%r2),__LC_MCCK_ENTER_TIMER 12284bfc86ceSHeiko Carstens0: # check if stck & stpt have been executed 12294bfc86ceSHeiko Carstens clg %r9,BASED(.Lcleanup_idle_insn) 12304bfc86ceSHeiko Carstens jhe 1f 12314bfc86ceSHeiko Carstens mvc __CLOCK_IDLE_ENTER(8,%r2),__CLOCK_IDLE_EXIT(%r2) 12324bfc86ceSHeiko Carstens mvc __TIMER_IDLE_ENTER(8,%r2),__TIMER_IDLE_EXIT(%r2) 123372d38b19SMartin Schwidefsky1: # calculate idle cycles 123472d38b19SMartin Schwidefsky#ifdef CONFIG_SMP 123572d38b19SMartin Schwidefsky clg %r9,BASED(.Lcleanup_idle_insn) 123672d38b19SMartin Schwidefsky jl 3f 123772d38b19SMartin Schwidefsky larl %r1,smp_cpu_mtid 123872d38b19SMartin Schwidefsky llgf %r1,0(%r1) 123972d38b19SMartin Schwidefsky ltgr %r1,%r1 124072d38b19SMartin Schwidefsky jz 3f 124172d38b19SMartin Schwidefsky .insn rsy,0xeb0000000017,%r1,5,__SF_EMPTY+80(%r15) 124272d38b19SMartin Schwidefsky larl %r3,mt_cycles 124372d38b19SMartin Schwidefsky ag %r3,__LC_PERCPU_OFFSET 124472d38b19SMartin Schwidefsky la %r4,__SF_EMPTY+16(%r15) 124572d38b19SMartin Schwidefsky2: lg %r0,0(%r3) 124672d38b19SMartin Schwidefsky slg %r0,0(%r4) 124772d38b19SMartin Schwidefsky alg %r0,64(%r4) 124872d38b19SMartin Schwidefsky stg %r0,0(%r3) 124972d38b19SMartin Schwidefsky la %r3,8(%r3) 125072d38b19SMartin Schwidefsky la %r4,8(%r4) 125172d38b19SMartin Schwidefsky brct %r1,2b 125272d38b19SMartin Schwidefsky#endif 125372d38b19SMartin Schwidefsky3: # account system time going idle 12544bfc86ceSHeiko Carstens lg %r9,__LC_STEAL_TIMER 12554bfc86ceSHeiko Carstens alg %r9,__CLOCK_IDLE_ENTER(%r2) 12564bfc86ceSHeiko Carstens slg %r9,__LC_LAST_UPDATE_CLOCK 12574bfc86ceSHeiko Carstens stg %r9,__LC_STEAL_TIMER 12584bfc86ceSHeiko Carstens mvc __LC_LAST_UPDATE_CLOCK(8),__CLOCK_IDLE_EXIT(%r2) 12594bfc86ceSHeiko Carstens lg %r9,__LC_SYSTEM_TIMER 12604bfc86ceSHeiko Carstens alg %r9,__LC_LAST_UPDATE_TIMER 12614bfc86ceSHeiko Carstens slg %r9,__TIMER_IDLE_ENTER(%r2) 12624bfc86ceSHeiko Carstens stg %r9,__LC_SYSTEM_TIMER 12634bfc86ceSHeiko Carstens mvc __LC_LAST_UPDATE_TIMER(8),__TIMER_IDLE_EXIT(%r2) 12644bfc86ceSHeiko Carstens # prepare return psw 12654bfc86ceSHeiko Carstens nihh %r8,0xfcfd # clear irq & wait state bits 12664bfc86ceSHeiko Carstens lg %r9,48(%r11) # return from psw_idle 12674bfc86ceSHeiko Carstens br %r14 12684bfc86ceSHeiko Carstens.Lcleanup_idle_insn: 12694bfc86ceSHeiko Carstens .quad .Lpsw_idle_lpsw 12704bfc86ceSHeiko Carstens 12719977e886SHendrik Brueckner.Lcleanup_save_fpu_regs: 1272e370e476SMartin Schwidefsky larl %r9,save_fpu_regs 12739977e886SHendrik Brueckner br %r14 12749977e886SHendrik Brueckner 12759977e886SHendrik Brueckner.Lcleanup_load_fpu_regs: 1276e370e476SMartin Schwidefsky larl %r9,load_fpu_regs 12779977e886SHendrik Brueckner br %r14 12789977e886SHendrik Brueckner 12794bfc86ceSHeiko Carstens/* 12804bfc86ceSHeiko Carstens * Integer constants 12814bfc86ceSHeiko Carstens */ 12824bfc86ceSHeiko Carstens .align 8 12834bfc86ceSHeiko Carstens.Lcritical_start: 12844bfc86ceSHeiko Carstens .quad .L__critical_start 12854bfc86ceSHeiko Carstens.Lcritical_length: 12864bfc86ceSHeiko Carstens .quad .L__critical_end - .L__critical_start 12874bfc86ceSHeiko Carstens#if IS_ENABLED(CONFIG_KVM) 1288d0fc4107SMartin Schwidefsky.Lsie_critical_start: 12894bfc86ceSHeiko Carstens .quad .Lsie_gmap 12904bfc86ceSHeiko Carstens.Lsie_critical_length: 12914bfc86ceSHeiko Carstens .quad .Lsie_done - .Lsie_gmap 12924bfc86ceSHeiko Carstens#endif 12934bfc86ceSHeiko Carstens 12944bfc86ceSHeiko Carstens .section .rodata, "a" 1295a876cb3fSHeiko Carstens#define SYSCALL(esame,emu) .long esame 12964bfc86ceSHeiko Carstens .globl sys_call_table 12974bfc86ceSHeiko Carstenssys_call_table: 12984bfc86ceSHeiko Carstens#include "syscalls.S" 12994bfc86ceSHeiko Carstens#undef SYSCALL 13004bfc86ceSHeiko Carstens 13014bfc86ceSHeiko Carstens#ifdef CONFIG_COMPAT 13024bfc86ceSHeiko Carstens 1303a876cb3fSHeiko Carstens#define SYSCALL(esame,emu) .long emu 13044bfc86ceSHeiko Carstens .globl sys_call_table_emu 13054bfc86ceSHeiko Carstenssys_call_table_emu: 13064bfc86ceSHeiko Carstens#include "syscalls.S" 13074bfc86ceSHeiko Carstens#undef SYSCALL 13084bfc86ceSHeiko Carstens#endif 1309