2 * sie64a.S - low level sie call
4 * Copyright IBM Corp. 2008,2010
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License (version 2 only)
8 * as published by the Free Software Foundation.
10 * Author(s): Heiko Carstens <heiko.carstens@de.ibm.com>
11 * Christian Ehrhardt <ehrhardt@linux.vnet.ibm.com>
14 #include <linux/errno.h>
15 #include <asm/asm-offsets.h>
16 #include <asm/setup.h>
17 #include <asm/ptrace.h>
18 #include <asm/thread_info.h>
20 _TIF_EXIT_SIE = (_TIF_SIGPENDING | _TIF_NEED_RESCHED | _TIF_MCCK_PENDING)
23 * offsets into stackframe
24 * SP_ = offsets into stack sie64 is called with
25 * SPI_ = offsets into irq stack
28 SP_HOOK = __SF_EMPTY+8
29 SP_GPP = __SF_EMPTY+16
30 SPI_PSW = STACK_FRAME_OVERHEAD + __PT_PSW
34 tm __LC_MACHINE_FLAGS+6,0x20 # MACHINE_FLAG_SPP
36 .insn s,0xb2800000,\newpp
41 SPP __LC_CMF_HPP # set host id
43 clg %r2,SPI_PSW+8(0,%r15) # intercepted sie
45 xc __LC_SIE_HOOK(8),__LC_SIE_HOOK
46 lg %r2,__LC_THREAD_INFO # pointer thread_info struct
47 tm __TI_flags+7(%r2),_TIF_EXIT_SIE
49 larl %r2,sie_exit # work pending, leave sie
50 stg %r2,SPI_PSW+8(0,%r15)
52 0: larl %r2,sie_reenter # re-enter with guest id
53 stg %r2,SPI_PSW+8(0,%r15)
57 * sie64a calling convention:
58 * %r2 pointer to sie control block
59 * %r3 guest register save area
63 stg %r3,SP_GREGS(%r15) # save guest register save area
64 stmg %r6,%r14,__SF_GPRS(%r15) # save registers on entry
65 lgr %r14,%r2 # pointer to sie control block
66 larl %r5,sie_irq_handler
68 stg %r5,SP_HOOK(%r15) # save hook target
69 lmg %r0,%r13,0(%r3) # load guest gprs 0-13
71 mvc __LC_SIE_HOOK(8),SP_HOOK(%r15)
72 SPP SP_GPP(%r15) # set guest id
75 xc __LC_SIE_HOOK(8),__LC_SIE_HOOK
76 SPP __LC_CMF_HPP # set host id
78 lg %r14,SP_GREGS(%r15)
79 stmg %r0,%r13,0(%r14) # save guest gprs 0-13
81 lmg %r6,%r14,__SF_GPRS(%r15)
85 xc __LC_SIE_HOOK(8),__LC_SIE_HOOK
86 SPP __LC_CMF_HPP # set host id
87 lg %r14,SP_GREGS(%r15)
88 stmg %r0,%r13,0(%r14) # save guest gprs 0-13
90 lmg %r6,%r14,__SF_GPRS(%r15)
93 .section __ex_table,"a"
94 .quad sie_inst,sie_err
95 .quad sie_exit,sie_err
96 .quad sie_reenter,sie_err