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/asm-offsets.h>
18 #include <asm/ptrace.h>
19 #include <asm/thread_info.h>
21 _TIF_EXIT_SIE = (_TIF_SIGPENDING | _TIF_NEED_RESCHED | _TIF_MCCK_PENDING)
24 * offsets into stackframe
25 * SP_ = offsets into stack sie64 is called with
26 * SPI_ = offsets into irq stack
29 SP_HOOK = __SF_EMPTY+8
30 SP_GPP = __SF_EMPTY+16
31 SPI_PSW = STACK_FRAME_OVERHEAD + __PT_PSW
35 #ifdef CONFIG_KVM_AWARE_CMF
36 tm __LC_MACHINE_FLAGS+6,0x20 # MACHINE_FLAG_SPP
38 .insn s,0xb2800000,\newpp
44 SPP __LC_CMF_HPP # set host id
46 clg %r2,SPI_PSW+8(0,%r15) # intercepted sie
48 xc __LC_SIE_HOOK(8),__LC_SIE_HOOK
49 lg %r2,__LC_THREAD_INFO # pointer thread_info struct
50 tm __TI_flags+7(%r2),_TIF_EXIT_SIE
52 larl %r2,sie_exit # work pending, leave sie
53 stg %r2,__LC_RETURN_PSW+8
55 0: larl %r2,sie_reenter # re-enter with guest id
56 stg %r2,__LC_RETURN_PSW+8
60 * sie64a calling convention:
61 * %r2 pointer to sie control block
62 * %r3 guest register save area
66 stg %r3,SP_GREGS(%r15) # save guest register save area
67 stmg %r6,%r14,__SF_GPRS(%r15) # save registers on entry
68 lgr %r14,%r2 # pointer to sie control block
69 larl %r5,sie_irq_handler
71 stg %r5,SP_HOOK(%r15) # save hook target
72 lmg %r0,%r13,0(%r3) # load guest gprs 0-13
74 mvc __LC_SIE_HOOK(8),SP_HOOK(%r15)
75 SPP SP_GPP(%r15) # set guest id
78 xc __LC_SIE_HOOK(8),__LC_SIE_HOOK
79 SPP __LC_CMF_HPP # set host id
81 lg %r14,SP_GREGS(%r15)
82 stmg %r0,%r13,0(%r14) # save guest gprs 0-13
84 lmg %r6,%r14,__SF_GPRS(%r15)
88 xc __LC_SIE_HOOK(8),__LC_SIE_HOOK
89 SPP __LC_CMF_HPP # set host id
90 lg %r14,SP_GREGS(%r15)
91 stmg %r0,%r13,0(%r14) # save guest gprs 0-13
93 lmg %r6,%r14,__SF_GPRS(%r15)
96 .section __ex_table,"a"
97 .quad sie_inst,sie_err