Commit f0778475 authored by Christian Borntraeger's avatar Christian Borntraeger
Browse files

s390: Implement load normal reset 



kdump on s390 uses a load normal reset to bring the system in a defined
state by doing a subsystem reset. The issuing CPUs will have an initial
CPU reset, all other CPUs will have a CPU reset as defined in POP (no
register content will change).

Implement this as architectured.

Signed-off-by: default avatarChristian Borntraeger <borntraeger@de.ibm.com>
parent f5ae2a4f

target-s390x/misc_helper.c

+30 −0
Original line number Diff line number Diff line
@@ -31,6 +31,7 @@ 


#if !defined(CONFIG_USER_ONLY)

#include "exec/softmmu_exec.h"

#include "sysemu/cpus.h"

#include "sysemu/sysemu.h"

#endif
@@ -180,6 +181,32 @@ uint32_t HELPER(servc)(CPUS390XState *env, uint64_t r1, uint64_t r2) 
}



#ifndef CONFIG_USER_ONLY

static void cpu_reset_all(void)

{

    CPUState *cpu;

    S390CPUClass *scc;



    for (cpu = first_cpu; cpu; cpu = cpu->next_cpu) {

        scc = S390_CPU_GET_CLASS(CPU(cpu));

        scc->cpu_reset(CPU(cpu));

    }

}



static int load_normal_reset(S390CPU *cpu)

{

    S390CPUClass *scc = S390_CPU_GET_CLASS(cpu);



    pause_all_vcpus();

    cpu_synchronize_all_states();

    cpu_reset_all();

    io_subsystem_reset();

    scc->initial_cpu_reset(CPU(cpu));

    scc->load_normal(CPU(cpu));

    cpu_synchronize_all_post_reset();

    resume_all_vcpus();

    return 0;

}



#define DIAG_308_RC_NO_CONF         0x0102

#define DIAG_308_RC_INVALID         0x0402

void handle_diag_308(CPUS390XState *env, uint64_t r1, uint64_t r3)
@@ -198,6 +225,9 @@ void handle_diag_308(CPUS390XState *env, uint64_t r1, uint64_t r3) 
    }



    switch (subcode) {

    case 1:

        load_normal_reset(s390_env_get_cpu(env));

        break;

    case 5:

        if ((r1 & 1) || (addr & 0x0fffULL)) {

            program_interrupt(env, PGM_SPECIFICATION, ILEN_LATER_INC);