f5bfa159d2
Because the vmcore_info pointer is not 8 byte aligned it never should not be accessed directly. The reason is that the compiler assumes that 64 bit pointer are always double word aligned. To ensure save access, the vmcore_info type in struct lowcore is changed from u64 to an u8[8] array and a comment is added. Signed-off-by: Michael Holzheu <holzheu@linux.vnet.ibm.com> Reported-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
361 lines
11 KiB
C
361 lines
11 KiB
C
/*
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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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#ifdef CONFIG_32BIT
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#define LC_ORDER 0
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#define LC_PAGES 1
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struct save_area {
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u32 ext_save;
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u64 timer;
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u64 clk_cmp;
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u8 pad1[24];
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u8 psw[8];
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u32 pref_reg;
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u8 pad2[20];
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u32 acc_regs[16];
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u64 fp_regs[4];
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u32 gp_regs[16];
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u32 ctrl_regs[16];
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} __packed;
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struct _lowcore {
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psw_t restart_psw; /* 0x0000 */
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psw_t restart_old_psw; /* 0x0008 */
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__u8 pad_0x0010[0x0014-0x0010]; /* 0x0010 */
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__u32 ipl_parmblock_ptr; /* 0x0014 */
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psw_t external_old_psw; /* 0x0018 */
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psw_t svc_old_psw; /* 0x0020 */
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psw_t program_old_psw; /* 0x0028 */
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psw_t mcck_old_psw; /* 0x0030 */
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psw_t io_old_psw; /* 0x0038 */
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__u8 pad_0x0040[0x0058-0x0040]; /* 0x0040 */
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psw_t external_new_psw; /* 0x0058 */
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psw_t svc_new_psw; /* 0x0060 */
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psw_t program_new_psw; /* 0x0068 */
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psw_t mcck_new_psw; /* 0x0070 */
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psw_t io_new_psw; /* 0x0078 */
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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 trans_exc_code; /* 0x0090 */
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__u16 mon_class_num; /* 0x0094 */
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__u16 per_perc_atmid; /* 0x0096 */
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__u32 per_address; /* 0x0098 */
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__u32 monitor_code; /* 0x009c */
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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_access_id; /* 0x00a3 */
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__u8 pad_0x00a4[0x00b8-0x00a4]; /* 0x00a4 */
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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[0x00d4-0x00cc]; /* 0x00cc */
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__u32 extended_save_area_addr; /* 0x00d4 */
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__u32 cpu_timer_save_area[2]; /* 0x00d8 */
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__u32 clock_comp_save_area[2]; /* 0x00e0 */
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__u32 mcck_interruption_code[2]; /* 0x00e8 */
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__u8 pad_0x00f0[0x00f4-0x00f0]; /* 0x00f0 */
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__u32 external_damage_code; /* 0x00f4 */
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__u32 failing_storage_address; /* 0x00f8 */
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__u8 pad_0x00fc[0x0100-0x00fc]; /* 0x00fc */
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psw_t psw_save_area; /* 0x0100 */
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__u32 prefixreg_save_area; /* 0x0108 */
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__u8 pad_0x010c[0x0120-0x010c]; /* 0x010c */
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/* CPU register save area: defined by architecture */
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__u32 access_regs_save_area[16]; /* 0x0120 */
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__u32 floating_pt_save_area[8]; /* 0x0160 */
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__u32 gpregs_save_area[16]; /* 0x0180 */
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__u32 cregs_save_area[16]; /* 0x01c0 */
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/* Save areas. */
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__u32 save_area_sync[8]; /* 0x0200 */
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__u32 save_area_async[8]; /* 0x0220 */
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__u32 save_area_restart[1]; /* 0x0240 */
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__u8 pad_0x0244[0x0248-0x0244]; /* 0x0244 */
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/* Return psws. */
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psw_t return_psw; /* 0x0248 */
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psw_t return_mcck_psw; /* 0x0250 */
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/* CPU time accounting values */
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__u64 sync_enter_timer; /* 0x0258 */
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__u64 async_enter_timer; /* 0x0260 */
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__u64 mcck_enter_timer; /* 0x0268 */
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__u64 exit_timer; /* 0x0270 */
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__u64 user_timer; /* 0x0278 */
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__u64 system_timer; /* 0x0280 */
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__u64 steal_timer; /* 0x0288 */
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__u64 last_update_timer; /* 0x0290 */
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__u64 last_update_clock; /* 0x0298 */
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__u64 int_clock; /* 0x02a0 */
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__u64 mcck_clock; /* 0x02a8 */
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__u64 clock_comparator; /* 0x02b0 */
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/* Current process. */
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__u32 current_task; /* 0x02b8 */
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__u32 thread_info; /* 0x02bc */
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__u32 kernel_stack; /* 0x02c0 */
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/* Interrupt, panic and restart stack. */
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__u32 async_stack; /* 0x02c4 */
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__u32 panic_stack; /* 0x02c8 */
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__u32 restart_stack; /* 0x02cc */
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/* Restart function and parameter. */
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__u32 restart_fn; /* 0x02d0 */
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__u32 restart_data; /* 0x02d4 */
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__u32 restart_source; /* 0x02d8 */
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/* Address space pointer. */
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__u32 kernel_asce; /* 0x02dc */
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__u32 user_asce; /* 0x02e0 */
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__u32 current_pid; /* 0x02e4 */
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/* SMP info area */
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__u32 cpu_nr; /* 0x02e8 */
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__u32 softirq_pending; /* 0x02ec */
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__u32 percpu_offset; /* 0x02f0 */
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__u32 machine_flags; /* 0x02f4 */
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__u32 ftrace_func; /* 0x02f8 */
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__u8 pad_0x02fc[0x0300-0x02fc]; /* 0x02fc */
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/* Interrupt response block */
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__u8 irb[64]; /* 0x0300 */
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__u8 pad_0x0340[0x0e00-0x0340]; /* 0x0340 */
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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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__u32 ipib; /* 0x0e00 */
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__u32 ipib_checksum; /* 0x0e04 */
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__u32 vmcore_info; /* 0x0e08 */
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__u8 pad_0x0e0c[0x0e18-0x0e0c]; /* 0x0e0c */
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__u32 os_info; /* 0x0e18 */
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__u8 pad_0x0e1c[0x0f00-0x0e1c]; /* 0x0e1c */
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/* Extended facility list */
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__u64 stfle_fac_list[32]; /* 0x0f00 */
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} __packed;
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#else /* CONFIG_32BIT */
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#define LC_ORDER 1
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#define LC_PAGES 2
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struct save_area {
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u64 fp_regs[16];
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u64 gp_regs[16];
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u8 psw[16];
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u8 pad1[8];
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u32 pref_reg;
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u32 fp_ctrl_reg;
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u8 pad2[4];
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u32 tod_reg;
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u64 timer;
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u64 clk_cmp;
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u8 pad3[8];
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u32 acc_regs[16];
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u64 ctrl_regs[16];
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} __packed;
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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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__u16 per_perc_atmid; /* 0x0096 */
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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_access_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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__u32 mcck_interruption_code[2]; /* 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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__u8 pad_0x0288[0x0290-0x0288]; /* 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 system_timer; /* 0x02d8 */
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__u64 steal_timer; /* 0x02e0 */
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__u64 last_update_timer; /* 0x02e8 */
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__u64 last_update_clock; /* 0x02f0 */
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__u64 int_clock; /* 0x02f8 */
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__u64 mcck_clock; /* 0x0300 */
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__u64 clock_comparator; /* 0x0308 */
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/* Current process. */
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__u64 current_task; /* 0x0310 */
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__u64 thread_info; /* 0x0318 */
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__u64 kernel_stack; /* 0x0320 */
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/* Interrupt, panic and restart stack. */
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__u64 async_stack; /* 0x0328 */
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__u64 panic_stack; /* 0x0330 */
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__u64 restart_stack; /* 0x0338 */
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/* Restart function and parameter. */
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__u64 restart_fn; /* 0x0340 */
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__u64 restart_data; /* 0x0348 */
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__u64 restart_source; /* 0x0350 */
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/* Address space pointer. */
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__u64 kernel_asce; /* 0x0358 */
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__u64 user_asce; /* 0x0360 */
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__u64 current_pid; /* 0x0368 */
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/* SMP info area */
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__u32 cpu_nr; /* 0x0370 */
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__u32 softirq_pending; /* 0x0374 */
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__u64 percpu_offset; /* 0x0378 */
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__u64 vdso_per_cpu_data; /* 0x0380 */
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__u64 machine_flags; /* 0x0388 */
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__u64 ftrace_func; /* 0x0390 */
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__u64 gmap; /* 0x0398 */
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__u8 pad_0x03a0[0x0400-0x03a0]; /* 0x03a0 */
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/* Interrupt response block. */
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__u8 irb[64]; /* 0x0400 */
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/* Per cpu primary space access list */
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__u32 paste[16]; /* 0x0440 */
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__u8 pad_0x0480[0x0e00-0x0480]; /* 0x0480 */
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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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/*
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* Because the vmcore_info pointer is not 8 byte aligned it never
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* should not be accessed directly. For accessing the pointer, first
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* copy it to a local pointer variable.
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*/
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__u8 vmcore_info[8]; /* 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[32]; /* 0x0f00 */
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__u8 pad_0x1000[0x11b8-0x1000]; /* 0x1000 */
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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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/* align to the top of the prefix area */
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__u8 pad_0x1400[0x2000-0x1400]; /* 0x1400 */
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} __packed;
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#endif /* CONFIG_32BIT */
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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" : : "m" (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" : "=m" (address));
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return address;
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}
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#endif /* _ASM_S390_LOWCORE_H */
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