forked from Minki/linux
916cda1aa1
This adds a new system call to enable the use of guarded storage for
user space processes. The system call takes two arguments, a command
and pointer to a guarded storage control block:
s390_guarded_storage(int command, struct gs_cb *gs_cb);
The second argument is relevant only for the GS_SET_BC_CB command.
The commands in detail:
0 - GS_ENABLE
Enable the guarded storage facility for the current task. The
initial content of the guarded storage control block will be
all zeros. After the enablement the user space code can use
load-guarded-storage-controls instruction (LGSC) to load an
arbitrary control block. While a task is enabled the kernel
will save and restore the current content of the guarded
storage registers on context switch.
1 - GS_DISABLE
Disables the use of the guarded storage facility for the current
task. The kernel will cease to save and restore the content of
the guarded storage registers, the task specific content of
these registers is lost.
2 - GS_SET_BC_CB
Set a broadcast guarded storage control block. This is called
per thread and stores a specific guarded storage control block
in the task struct of the current task. This control block will
be used for the broadcast event GS_BROADCAST.
3 - GS_CLEAR_BC_CB
Clears the broadcast guarded storage control block. The guarded-
storage control block is removed from the task struct that was
established by GS_SET_BC_CB.
4 - GS_BROADCAST
Sends a broadcast to all thread siblings of the current task.
Every sibling that has established a broadcast guarded storage
control block will load this control block and will be enabled
for guarded storage. The broadcast guarded storage control block
is used up, a second broadcast without a refresh of the stored
control block with GS_SET_BC_CB will not have any effect.
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
198 lines
8.6 KiB
C
198 lines
8.6 KiB
C
/*
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* Generate definitions needed by assembly language modules.
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* This code generates raw asm output which is post-processed to extract
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* and format the required data.
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*/
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#define ASM_OFFSETS_C
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#include <linux/kbuild.h>
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#include <linux/kvm_host.h>
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#include <linux/sched.h>
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#include <asm/idle.h>
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#include <asm/vdso.h>
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#include <asm/pgtable.h>
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#include <asm/gmap.h>
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/*
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* Make sure that the compiler is new enough. We want a compiler that
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* is known to work with the "Q" assembler constraint.
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*/
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#if __GNUC__ < 4 || (__GNUC__ == 4 && __GNUC_MINOR__ < 3)
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#error Your compiler is too old; please use version 4.3 or newer
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#endif
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int main(void)
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{
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/* task struct offsets */
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OFFSET(__TASK_stack, task_struct, stack);
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OFFSET(__TASK_thread, task_struct, thread);
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OFFSET(__TASK_pid, task_struct, pid);
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BLANK();
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/* thread struct offsets */
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OFFSET(__THREAD_ksp, thread_struct, ksp);
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OFFSET(__THREAD_sysc_table, thread_struct, sys_call_table);
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OFFSET(__THREAD_last_break, thread_struct, last_break);
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OFFSET(__THREAD_FPU_fpc, thread_struct, fpu.fpc);
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OFFSET(__THREAD_FPU_regs, thread_struct, fpu.regs);
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OFFSET(__THREAD_per_cause, thread_struct, per_event.cause);
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OFFSET(__THREAD_per_address, thread_struct, per_event.address);
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OFFSET(__THREAD_per_paid, thread_struct, per_event.paid);
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OFFSET(__THREAD_trap_tdb, thread_struct, trap_tdb);
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BLANK();
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/* thread info offsets */
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OFFSET(__TI_flags, task_struct, thread_info.flags);
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BLANK();
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/* pt_regs offsets */
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OFFSET(__PT_ARGS, pt_regs, args);
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OFFSET(__PT_PSW, pt_regs, psw);
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OFFSET(__PT_GPRS, pt_regs, gprs);
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OFFSET(__PT_ORIG_GPR2, pt_regs, orig_gpr2);
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OFFSET(__PT_INT_CODE, pt_regs, int_code);
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OFFSET(__PT_INT_PARM, pt_regs, int_parm);
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OFFSET(__PT_INT_PARM_LONG, pt_regs, int_parm_long);
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OFFSET(__PT_FLAGS, pt_regs, flags);
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DEFINE(__PT_SIZE, sizeof(struct pt_regs));
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BLANK();
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/* stack_frame offsets */
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OFFSET(__SF_BACKCHAIN, stack_frame, back_chain);
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OFFSET(__SF_GPRS, stack_frame, gprs);
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OFFSET(__SF_EMPTY, stack_frame, empty1);
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BLANK();
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/* timeval/timezone offsets for use by vdso */
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OFFSET(__VDSO_UPD_COUNT, vdso_data, tb_update_count);
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OFFSET(__VDSO_XTIME_STAMP, vdso_data, xtime_tod_stamp);
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OFFSET(__VDSO_XTIME_SEC, vdso_data, xtime_clock_sec);
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OFFSET(__VDSO_XTIME_NSEC, vdso_data, xtime_clock_nsec);
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OFFSET(__VDSO_XTIME_CRS_SEC, vdso_data, xtime_coarse_sec);
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OFFSET(__VDSO_XTIME_CRS_NSEC, vdso_data, xtime_coarse_nsec);
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OFFSET(__VDSO_WTOM_SEC, vdso_data, wtom_clock_sec);
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OFFSET(__VDSO_WTOM_NSEC, vdso_data, wtom_clock_nsec);
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OFFSET(__VDSO_WTOM_CRS_SEC, vdso_data, wtom_coarse_sec);
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OFFSET(__VDSO_WTOM_CRS_NSEC, vdso_data, wtom_coarse_nsec);
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OFFSET(__VDSO_TIMEZONE, vdso_data, tz_minuteswest);
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OFFSET(__VDSO_ECTG_OK, vdso_data, ectg_available);
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OFFSET(__VDSO_TK_MULT, vdso_data, tk_mult);
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OFFSET(__VDSO_TK_SHIFT, vdso_data, tk_shift);
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OFFSET(__VDSO_TS_DIR, vdso_data, ts_dir);
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OFFSET(__VDSO_TS_END, vdso_data, ts_end);
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OFFSET(__VDSO_ECTG_BASE, vdso_per_cpu_data, ectg_timer_base);
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OFFSET(__VDSO_ECTG_USER, vdso_per_cpu_data, ectg_user_time);
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OFFSET(__VDSO_CPU_NR, vdso_per_cpu_data, cpu_nr);
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OFFSET(__VDSO_NODE_ID, vdso_per_cpu_data, node_id);
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BLANK();
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/* constants used by the vdso */
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DEFINE(__CLOCK_REALTIME, CLOCK_REALTIME);
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DEFINE(__CLOCK_MONOTONIC, CLOCK_MONOTONIC);
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DEFINE(__CLOCK_REALTIME_COARSE, CLOCK_REALTIME_COARSE);
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DEFINE(__CLOCK_MONOTONIC_COARSE, CLOCK_MONOTONIC_COARSE);
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DEFINE(__CLOCK_THREAD_CPUTIME_ID, CLOCK_THREAD_CPUTIME_ID);
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DEFINE(__CLOCK_REALTIME_RES, MONOTONIC_RES_NSEC);
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DEFINE(__CLOCK_COARSE_RES, LOW_RES_NSEC);
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BLANK();
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/* idle data offsets */
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OFFSET(__CLOCK_IDLE_ENTER, s390_idle_data, clock_idle_enter);
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OFFSET(__CLOCK_IDLE_EXIT, s390_idle_data, clock_idle_exit);
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OFFSET(__TIMER_IDLE_ENTER, s390_idle_data, timer_idle_enter);
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OFFSET(__TIMER_IDLE_EXIT, s390_idle_data, timer_idle_exit);
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BLANK();
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/* hardware defined lowcore locations 0x000 - 0x1ff */
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OFFSET(__LC_EXT_PARAMS, lowcore, ext_params);
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OFFSET(__LC_EXT_CPU_ADDR, lowcore, ext_cpu_addr);
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OFFSET(__LC_EXT_INT_CODE, lowcore, ext_int_code);
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OFFSET(__LC_SVC_ILC, lowcore, svc_ilc);
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OFFSET(__LC_SVC_INT_CODE, lowcore, svc_code);
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OFFSET(__LC_PGM_ILC, lowcore, pgm_ilc);
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OFFSET(__LC_PGM_INT_CODE, lowcore, pgm_code);
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OFFSET(__LC_DATA_EXC_CODE, lowcore, data_exc_code);
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OFFSET(__LC_MON_CLASS_NR, lowcore, mon_class_num);
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OFFSET(__LC_PER_CODE, lowcore, per_code);
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OFFSET(__LC_PER_ATMID, lowcore, per_atmid);
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OFFSET(__LC_PER_ADDRESS, lowcore, per_address);
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OFFSET(__LC_EXC_ACCESS_ID, lowcore, exc_access_id);
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OFFSET(__LC_PER_ACCESS_ID, lowcore, per_access_id);
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OFFSET(__LC_OP_ACCESS_ID, lowcore, op_access_id);
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OFFSET(__LC_AR_MODE_ID, lowcore, ar_mode_id);
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OFFSET(__LC_TRANS_EXC_CODE, lowcore, trans_exc_code);
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OFFSET(__LC_MON_CODE, lowcore, monitor_code);
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OFFSET(__LC_SUBCHANNEL_ID, lowcore, subchannel_id);
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OFFSET(__LC_SUBCHANNEL_NR, lowcore, subchannel_nr);
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OFFSET(__LC_IO_INT_PARM, lowcore, io_int_parm);
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OFFSET(__LC_IO_INT_WORD, lowcore, io_int_word);
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OFFSET(__LC_STFL_FAC_LIST, lowcore, stfl_fac_list);
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OFFSET(__LC_STFLE_FAC_LIST, lowcore, stfle_fac_list);
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OFFSET(__LC_MCCK_CODE, lowcore, mcck_interruption_code);
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OFFSET(__LC_EXT_DAMAGE_CODE, lowcore, external_damage_code);
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OFFSET(__LC_MCCK_FAIL_STOR_ADDR, lowcore, failing_storage_address);
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OFFSET(__LC_LAST_BREAK, lowcore, breaking_event_addr);
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OFFSET(__LC_RST_OLD_PSW, lowcore, restart_old_psw);
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OFFSET(__LC_EXT_OLD_PSW, lowcore, external_old_psw);
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OFFSET(__LC_SVC_OLD_PSW, lowcore, svc_old_psw);
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OFFSET(__LC_PGM_OLD_PSW, lowcore, program_old_psw);
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OFFSET(__LC_MCK_OLD_PSW, lowcore, mcck_old_psw);
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OFFSET(__LC_IO_OLD_PSW, lowcore, io_old_psw);
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OFFSET(__LC_RST_NEW_PSW, lowcore, restart_psw);
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OFFSET(__LC_EXT_NEW_PSW, lowcore, external_new_psw);
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OFFSET(__LC_SVC_NEW_PSW, lowcore, svc_new_psw);
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OFFSET(__LC_PGM_NEW_PSW, lowcore, program_new_psw);
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OFFSET(__LC_MCK_NEW_PSW, lowcore, mcck_new_psw);
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OFFSET(__LC_IO_NEW_PSW, lowcore, io_new_psw);
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/* software defined lowcore locations 0x200 - 0xdff*/
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OFFSET(__LC_SAVE_AREA_SYNC, lowcore, save_area_sync);
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OFFSET(__LC_SAVE_AREA_ASYNC, lowcore, save_area_async);
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OFFSET(__LC_SAVE_AREA_RESTART, lowcore, save_area_restart);
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OFFSET(__LC_CPU_FLAGS, lowcore, cpu_flags);
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OFFSET(__LC_RETURN_PSW, lowcore, return_psw);
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OFFSET(__LC_RETURN_MCCK_PSW, lowcore, return_mcck_psw);
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OFFSET(__LC_SYNC_ENTER_TIMER, lowcore, sync_enter_timer);
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OFFSET(__LC_ASYNC_ENTER_TIMER, lowcore, async_enter_timer);
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OFFSET(__LC_MCCK_ENTER_TIMER, lowcore, mcck_enter_timer);
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OFFSET(__LC_EXIT_TIMER, lowcore, exit_timer);
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OFFSET(__LC_USER_TIMER, lowcore, user_timer);
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OFFSET(__LC_SYSTEM_TIMER, lowcore, system_timer);
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OFFSET(__LC_STEAL_TIMER, lowcore, steal_timer);
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OFFSET(__LC_LAST_UPDATE_TIMER, lowcore, last_update_timer);
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OFFSET(__LC_LAST_UPDATE_CLOCK, lowcore, last_update_clock);
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OFFSET(__LC_INT_CLOCK, lowcore, int_clock);
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OFFSET(__LC_MCCK_CLOCK, lowcore, mcck_clock);
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OFFSET(__LC_CURRENT, lowcore, current_task);
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OFFSET(__LC_KERNEL_STACK, lowcore, kernel_stack);
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OFFSET(__LC_ASYNC_STACK, lowcore, async_stack);
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OFFSET(__LC_PANIC_STACK, lowcore, panic_stack);
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OFFSET(__LC_RESTART_STACK, lowcore, restart_stack);
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OFFSET(__LC_RESTART_FN, lowcore, restart_fn);
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OFFSET(__LC_RESTART_DATA, lowcore, restart_data);
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OFFSET(__LC_RESTART_SOURCE, lowcore, restart_source);
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OFFSET(__LC_USER_ASCE, lowcore, user_asce);
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OFFSET(__LC_LPP, lowcore, lpp);
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OFFSET(__LC_CURRENT_PID, lowcore, current_pid);
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OFFSET(__LC_PERCPU_OFFSET, lowcore, percpu_offset);
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OFFSET(__LC_VDSO_PER_CPU, lowcore, vdso_per_cpu_data);
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OFFSET(__LC_MACHINE_FLAGS, lowcore, machine_flags);
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OFFSET(__LC_PREEMPT_COUNT, lowcore, preempt_count);
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OFFSET(__LC_GMAP, lowcore, gmap);
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OFFSET(__LC_PASTE, lowcore, paste);
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/* software defined ABI-relevant lowcore locations 0xe00 - 0xe20 */
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OFFSET(__LC_DUMP_REIPL, lowcore, ipib);
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/* hardware defined lowcore locations 0x1000 - 0x18ff */
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OFFSET(__LC_MCESAD, lowcore, mcesad);
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OFFSET(__LC_EXT_PARAMS2, lowcore, ext_params2);
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OFFSET(__LC_FPREGS_SAVE_AREA, lowcore, floating_pt_save_area);
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OFFSET(__LC_GPREGS_SAVE_AREA, lowcore, gpregs_save_area);
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OFFSET(__LC_PSW_SAVE_AREA, lowcore, psw_save_area);
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OFFSET(__LC_PREFIX_SAVE_AREA, lowcore, prefixreg_save_area);
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OFFSET(__LC_FP_CREG_SAVE_AREA, lowcore, fpt_creg_save_area);
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OFFSET(__LC_TOD_PROGREG_SAVE_AREA, lowcore, tod_progreg_save_area);
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OFFSET(__LC_CPU_TIMER_SAVE_AREA, lowcore, cpu_timer_save_area);
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OFFSET(__LC_CLOCK_COMP_SAVE_AREA, lowcore, clock_comp_save_area);
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OFFSET(__LC_AREGS_SAVE_AREA, lowcore, access_regs_save_area);
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OFFSET(__LC_CREGS_SAVE_AREA, lowcore, cregs_save_area);
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OFFSET(__LC_PGM_TDB, lowcore, pgm_tdb);
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BLANK();
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/* gmap/sie offsets */
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OFFSET(__GMAP_ASCE, gmap, asce);
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OFFSET(__SIE_PROG0C, kvm_s390_sie_block, prog0c);
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OFFSET(__SIE_PROG20, kvm_s390_sie_block, prog20);
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return 0;
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}
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