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3ad4c05a53
Aligning struct lowcore to double page size allows to get rid of this
gcc warning:
In file included from ./arch/s390/include/asm/setup.h:56,
from ./arch/s390/include/asm/page.h:36,
from ./arch/s390/include/asm/user.h:11,
from ./include/linux/user.h:1,
from ./include/linux/elfcore.h:5,
from ./include/linux/crash_core.h:6,
from ./include/linux/kexec.h:18,
from arch/s390/purgatory/purgatory.c:10:
./arch/s390/include/asm/lowcore.h:189:1: warning: alignment 1 of 'struct
lowcore' is less than 8 [-Wpacked-not-aligned]
} __packed;
Acked-by: Christian Borntraeger <borntraeger@de.ibm.com>
Reviewed-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
208 lines
6.3 KiB
C
208 lines
6.3 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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/*
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* Copyright IBM Corp. 1999, 2012
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* Author(s): Hartmut Penner <hp@de.ibm.com>,
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* Martin Schwidefsky <schwidefsky@de.ibm.com>,
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* Denis Joseph Barrow,
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*/
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#ifndef _ASM_S390_LOWCORE_H
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#define _ASM_S390_LOWCORE_H
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#include <linux/types.h>
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#include <asm/ptrace.h>
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#include <asm/cpu.h>
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#include <asm/types.h>
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#define LC_ORDER 1
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#define LC_PAGES 2
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struct lowcore {
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__u8 pad_0x0000[0x0014-0x0000]; /* 0x0000 */
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__u32 ipl_parmblock_ptr; /* 0x0014 */
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__u8 pad_0x0018[0x0080-0x0018]; /* 0x0018 */
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__u32 ext_params; /* 0x0080 */
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__u16 ext_cpu_addr; /* 0x0084 */
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__u16 ext_int_code; /* 0x0086 */
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__u16 svc_ilc; /* 0x0088 */
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__u16 svc_code; /* 0x008a */
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__u16 pgm_ilc; /* 0x008c */
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__u16 pgm_code; /* 0x008e */
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__u32 data_exc_code; /* 0x0090 */
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__u16 mon_class_num; /* 0x0094 */
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__u8 per_code; /* 0x0096 */
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__u8 per_atmid; /* 0x0097 */
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__u64 per_address; /* 0x0098 */
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__u8 exc_access_id; /* 0x00a0 */
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__u8 per_access_id; /* 0x00a1 */
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__u8 op_access_id; /* 0x00a2 */
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__u8 ar_mode_id; /* 0x00a3 */
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__u8 pad_0x00a4[0x00a8-0x00a4]; /* 0x00a4 */
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__u64 trans_exc_code; /* 0x00a8 */
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__u64 monitor_code; /* 0x00b0 */
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__u16 subchannel_id; /* 0x00b8 */
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__u16 subchannel_nr; /* 0x00ba */
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__u32 io_int_parm; /* 0x00bc */
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__u32 io_int_word; /* 0x00c0 */
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__u8 pad_0x00c4[0x00c8-0x00c4]; /* 0x00c4 */
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__u32 stfl_fac_list; /* 0x00c8 */
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__u8 pad_0x00cc[0x00e8-0x00cc]; /* 0x00cc */
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__u64 mcck_interruption_code; /* 0x00e8 */
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__u8 pad_0x00f0[0x00f4-0x00f0]; /* 0x00f0 */
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__u32 external_damage_code; /* 0x00f4 */
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__u64 failing_storage_address; /* 0x00f8 */
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__u8 pad_0x0100[0x0110-0x0100]; /* 0x0100 */
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__u64 breaking_event_addr; /* 0x0110 */
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__u8 pad_0x0118[0x0120-0x0118]; /* 0x0118 */
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psw_t restart_old_psw; /* 0x0120 */
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psw_t external_old_psw; /* 0x0130 */
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psw_t svc_old_psw; /* 0x0140 */
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psw_t program_old_psw; /* 0x0150 */
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psw_t mcck_old_psw; /* 0x0160 */
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psw_t io_old_psw; /* 0x0170 */
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__u8 pad_0x0180[0x01a0-0x0180]; /* 0x0180 */
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psw_t restart_psw; /* 0x01a0 */
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psw_t external_new_psw; /* 0x01b0 */
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psw_t svc_new_psw; /* 0x01c0 */
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psw_t program_new_psw; /* 0x01d0 */
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psw_t mcck_new_psw; /* 0x01e0 */
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psw_t io_new_psw; /* 0x01f0 */
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/* Save areas. */
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__u64 save_area_sync[8]; /* 0x0200 */
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__u64 save_area_async[8]; /* 0x0240 */
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__u64 save_area_restart[1]; /* 0x0280 */
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/* CPU flags. */
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__u64 cpu_flags; /* 0x0288 */
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/* Return psws. */
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psw_t return_psw; /* 0x0290 */
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psw_t return_mcck_psw; /* 0x02a0 */
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/* CPU accounting and timing values. */
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__u64 sync_enter_timer; /* 0x02b0 */
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__u64 async_enter_timer; /* 0x02b8 */
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__u64 mcck_enter_timer; /* 0x02c0 */
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__u64 exit_timer; /* 0x02c8 */
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__u64 user_timer; /* 0x02d0 */
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__u64 guest_timer; /* 0x02d8 */
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__u64 system_timer; /* 0x02e0 */
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__u64 hardirq_timer; /* 0x02e8 */
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__u64 softirq_timer; /* 0x02f0 */
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__u64 steal_timer; /* 0x02f8 */
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__u64 last_update_timer; /* 0x0300 */
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__u64 last_update_clock; /* 0x0308 */
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__u64 int_clock; /* 0x0310 */
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__u64 mcck_clock; /* 0x0318 */
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__u64 clock_comparator; /* 0x0320 */
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__u64 boot_clock[2]; /* 0x0328 */
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/* Current process. */
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__u64 current_task; /* 0x0338 */
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__u64 kernel_stack; /* 0x0340 */
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/* Interrupt, panic and restart stack. */
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__u64 async_stack; /* 0x0348 */
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__u64 panic_stack; /* 0x0350 */
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__u64 restart_stack; /* 0x0358 */
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/* Restart function and parameter. */
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__u64 restart_fn; /* 0x0360 */
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__u64 restart_data; /* 0x0368 */
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__u64 restart_source; /* 0x0370 */
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/* Address space pointer. */
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__u64 kernel_asce; /* 0x0378 */
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__u64 user_asce; /* 0x0380 */
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__u64 vdso_asce; /* 0x0388 */
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/*
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* The lpp and current_pid fields form a
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* 64-bit value that is set as program
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* parameter with the LPP instruction.
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*/
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__u32 lpp; /* 0x0390 */
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__u32 current_pid; /* 0x0394 */
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/* SMP info area */
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__u32 cpu_nr; /* 0x0398 */
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__u32 softirq_pending; /* 0x039c */
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__u32 preempt_count; /* 0x03a0 */
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__u32 spinlock_lockval; /* 0x03a4 */
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__u32 spinlock_index; /* 0x03a8 */
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__u32 fpu_flags; /* 0x03ac */
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__u64 percpu_offset; /* 0x03b0 */
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__u64 vdso_per_cpu_data; /* 0x03b8 */
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__u64 machine_flags; /* 0x03c0 */
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__u64 gmap; /* 0x03c8 */
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__u8 pad_0x03d0[0x0400-0x03d0]; /* 0x03d0 */
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/* br %r1 trampoline */
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__u16 br_r1_trampoline; /* 0x0400 */
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__u8 pad_0x0402[0x0e00-0x0402]; /* 0x0402 */
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/*
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* 0xe00 contains the address of the IPL Parameter Information
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* block. Dump tools need IPIB for IPL after dump.
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* Note: do not change the position of any fields in 0x0e00-0x0f00
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*/
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__u64 ipib; /* 0x0e00 */
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__u32 ipib_checksum; /* 0x0e08 */
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__u64 vmcore_info; /* 0x0e0c */
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__u8 pad_0x0e14[0x0e18-0x0e14]; /* 0x0e14 */
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__u64 os_info; /* 0x0e18 */
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__u8 pad_0x0e20[0x0f00-0x0e20]; /* 0x0e20 */
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/* Extended facility list */
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__u64 stfle_fac_list[16]; /* 0x0f00 */
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__u64 alt_stfle_fac_list[16]; /* 0x0f80 */
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__u8 pad_0x1000[0x11b0-0x1000]; /* 0x1000 */
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/* Pointer to the machine check extended save area */
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__u64 mcesad; /* 0x11b0 */
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/* 64 bit extparam used for pfault/diag 250: defined by architecture */
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__u64 ext_params2; /* 0x11B8 */
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__u8 pad_0x11c0[0x1200-0x11C0]; /* 0x11C0 */
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/* CPU register save area: defined by architecture */
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__u64 floating_pt_save_area[16]; /* 0x1200 */
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__u64 gpregs_save_area[16]; /* 0x1280 */
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psw_t psw_save_area; /* 0x1300 */
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__u8 pad_0x1310[0x1318-0x1310]; /* 0x1310 */
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__u32 prefixreg_save_area; /* 0x1318 */
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__u32 fpt_creg_save_area; /* 0x131c */
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__u8 pad_0x1320[0x1324-0x1320]; /* 0x1320 */
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__u32 tod_progreg_save_area; /* 0x1324 */
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__u32 cpu_timer_save_area[2]; /* 0x1328 */
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__u32 clock_comp_save_area[2]; /* 0x1330 */
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__u8 pad_0x1338[0x1340-0x1338]; /* 0x1338 */
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__u32 access_regs_save_area[16]; /* 0x1340 */
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__u64 cregs_save_area[16]; /* 0x1380 */
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__u8 pad_0x1400[0x1800-0x1400]; /* 0x1400 */
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/* Transaction abort diagnostic block */
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__u8 pgm_tdb[256]; /* 0x1800 */
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__u8 pad_0x1900[0x2000-0x1900]; /* 0x1900 */
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} __packed __aligned(8192);
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#define S390_lowcore (*((struct lowcore *) 0))
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extern struct lowcore *lowcore_ptr[];
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static inline void set_prefix(__u32 address)
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{
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asm volatile("spx %0" : : "Q" (address) : "memory");
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}
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static inline __u32 store_prefix(void)
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{
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__u32 address;
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asm volatile("stpx %0" : "=Q" (address));
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return address;
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}
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#endif /* _ASM_S390_LOWCORE_H */
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