566 lines
16 KiB
C
566 lines
16 KiB
C
/*
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* S/390 misc helper routines
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*
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* Copyright (c) 2009 Ulrich Hecht
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* Copyright (c) 2009 Alexander Graf
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, see <http://www.gnu.org/licenses/>.
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*/
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#include "qemu/osdep.h"
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#include "qemu/main-loop.h"
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#include "cpu.h"
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#include "internal.h"
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#include "exec/memory.h"
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#include "qemu/host-utils.h"
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#include "exec/helper-proto.h"
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#include "qemu/timer.h"
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#include "exec/address-spaces.h"
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#include "exec/exec-all.h"
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#include "exec/cpu_ldst.h"
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#if !defined(CONFIG_USER_ONLY)
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#include "sysemu/cpus.h"
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#include "sysemu/sysemu.h"
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#include "hw/s390x/ebcdic.h"
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#include "hw/s390x/s390-virtio-hcall.h"
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#include "hw/s390x/sclp.h"
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#endif
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/* #define DEBUG_HELPER */
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#ifdef DEBUG_HELPER
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#define HELPER_LOG(x...) qemu_log(x)
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#else
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#define HELPER_LOG(x...)
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#endif
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/* Raise an exception dynamically from a helper function. */
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void QEMU_NORETURN runtime_exception(CPUS390XState *env, int excp,
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uintptr_t retaddr)
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{
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CPUState *cs = CPU(s390_env_get_cpu(env));
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cs->exception_index = EXCP_PGM;
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env->int_pgm_code = excp;
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env->int_pgm_ilen = ILEN_AUTO;
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/* Use the (ultimate) callers address to find the insn that trapped. */
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cpu_restore_state(cs, retaddr);
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cpu_loop_exit(cs);
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}
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/* Raise an exception statically from a TB. */
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void HELPER(exception)(CPUS390XState *env, uint32_t excp)
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{
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CPUState *cs = CPU(s390_env_get_cpu(env));
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HELPER_LOG("%s: exception %d\n", __func__, excp);
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cs->exception_index = excp;
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cpu_loop_exit(cs);
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}
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#ifndef CONFIG_USER_ONLY
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/* SCLP service call */
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uint32_t HELPER(servc)(CPUS390XState *env, uint64_t r1, uint64_t r2)
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{
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qemu_mutex_lock_iothread();
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int r = sclp_service_call(env, r1, r2);
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if (r < 0) {
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program_interrupt(env, -r, 4);
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r = 0;
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}
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qemu_mutex_unlock_iothread();
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return r;
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}
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void HELPER(diag)(CPUS390XState *env, uint32_t r1, uint32_t r3, uint32_t num)
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{
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uint64_t r;
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switch (num) {
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case 0x500:
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/* KVM hypercall */
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qemu_mutex_lock_iothread();
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r = s390_virtio_hypercall(env);
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qemu_mutex_unlock_iothread();
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break;
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case 0x44:
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/* yield */
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r = 0;
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break;
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case 0x308:
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/* ipl */
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handle_diag_308(env, r1, r3);
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r = 0;
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break;
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case 0x288:
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/* time bomb (watchdog) */
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r = handle_diag_288(env, r1, r3);
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break;
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default:
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r = -1;
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break;
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}
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if (r) {
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program_interrupt(env, PGM_SPECIFICATION, ILEN_AUTO);
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}
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}
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/* Set Prefix */
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void HELPER(spx)(CPUS390XState *env, uint64_t a1)
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{
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CPUState *cs = CPU(s390_env_get_cpu(env));
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uint32_t prefix = a1 & 0x7fffe000;
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env->psa = prefix;
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HELPER_LOG("prefix: %#x\n", prefix);
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tlb_flush_page(cs, 0);
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tlb_flush_page(cs, TARGET_PAGE_SIZE);
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}
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/* Store Clock */
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uint64_t HELPER(stck)(CPUS390XState *env)
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{
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uint64_t time;
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time = env->tod_offset +
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time2tod(qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL) - env->tod_basetime);
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return time;
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}
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/* Set Clock Comparator */
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void HELPER(sckc)(CPUS390XState *env, uint64_t time)
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{
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if (time == -1ULL) {
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return;
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}
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env->ckc = time;
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/* difference between origins */
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time -= env->tod_offset;
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/* nanoseconds */
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time = tod2time(time);
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timer_mod(env->tod_timer, env->tod_basetime + time);
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}
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/* Store Clock Comparator */
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uint64_t HELPER(stckc)(CPUS390XState *env)
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{
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return env->ckc;
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}
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/* Set CPU Timer */
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void HELPER(spt)(CPUS390XState *env, uint64_t time)
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{
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if (time == -1ULL) {
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return;
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}
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/* nanoseconds */
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time = tod2time(time);
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env->cputm = qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL) + time;
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timer_mod(env->cpu_timer, env->cputm);
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}
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/* Store CPU Timer */
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uint64_t HELPER(stpt)(CPUS390XState *env)
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{
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return time2tod(env->cputm - qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL));
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}
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/* Store System Information */
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uint32_t HELPER(stsi)(CPUS390XState *env, uint64_t a0,
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uint64_t r0, uint64_t r1)
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{
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S390CPU *cpu = s390_env_get_cpu(env);
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int cc = 0;
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int sel1, sel2;
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if ((r0 & STSI_LEVEL_MASK) <= STSI_LEVEL_3 &&
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((r0 & STSI_R0_RESERVED_MASK) || (r1 & STSI_R1_RESERVED_MASK))) {
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/* valid function code, invalid reserved bits */
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program_interrupt(env, PGM_SPECIFICATION, 4);
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}
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sel1 = r0 & STSI_R0_SEL1_MASK;
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sel2 = r1 & STSI_R1_SEL2_MASK;
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/* XXX: spec exception if sysib is not 4k-aligned */
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switch (r0 & STSI_LEVEL_MASK) {
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case STSI_LEVEL_1:
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if ((sel1 == 1) && (sel2 == 1)) {
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/* Basic Machine Configuration */
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struct sysib_111 sysib;
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char type[5] = {};
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memset(&sysib, 0, sizeof(sysib));
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ebcdic_put(sysib.manuf, "QEMU ", 16);
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/* same as machine type number in STORE CPU ID, but in EBCDIC */
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snprintf(type, ARRAY_SIZE(type), "%X", cpu->model->def->type);
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ebcdic_put(sysib.type, type, 4);
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/* model number (not stored in STORE CPU ID for z/Architecure) */
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ebcdic_put(sysib.model, "QEMU ", 16);
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ebcdic_put(sysib.sequence, "QEMU ", 16);
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ebcdic_put(sysib.plant, "QEMU", 4);
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cpu_physical_memory_write(a0, &sysib, sizeof(sysib));
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} else if ((sel1 == 2) && (sel2 == 1)) {
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/* Basic Machine CPU */
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struct sysib_121 sysib;
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memset(&sysib, 0, sizeof(sysib));
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/* XXX make different for different CPUs? */
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ebcdic_put(sysib.sequence, "QEMUQEMUQEMUQEMU", 16);
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ebcdic_put(sysib.plant, "QEMU", 4);
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stw_p(&sysib.cpu_addr, env->core_id);
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cpu_physical_memory_write(a0, &sysib, sizeof(sysib));
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} else if ((sel1 == 2) && (sel2 == 2)) {
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/* Basic Machine CPUs */
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struct sysib_122 sysib;
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memset(&sysib, 0, sizeof(sysib));
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stl_p(&sysib.capability, 0x443afc29);
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/* XXX change when SMP comes */
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stw_p(&sysib.total_cpus, 1);
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stw_p(&sysib.active_cpus, 1);
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stw_p(&sysib.standby_cpus, 0);
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stw_p(&sysib.reserved_cpus, 0);
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cpu_physical_memory_write(a0, &sysib, sizeof(sysib));
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} else {
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cc = 3;
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}
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break;
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case STSI_LEVEL_2:
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{
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if ((sel1 == 2) && (sel2 == 1)) {
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/* LPAR CPU */
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struct sysib_221 sysib;
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memset(&sysib, 0, sizeof(sysib));
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/* XXX make different for different CPUs? */
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ebcdic_put(sysib.sequence, "QEMUQEMUQEMUQEMU", 16);
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ebcdic_put(sysib.plant, "QEMU", 4);
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stw_p(&sysib.cpu_addr, env->core_id);
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stw_p(&sysib.cpu_id, 0);
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cpu_physical_memory_write(a0, &sysib, sizeof(sysib));
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} else if ((sel1 == 2) && (sel2 == 2)) {
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/* LPAR CPUs */
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struct sysib_222 sysib;
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memset(&sysib, 0, sizeof(sysib));
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stw_p(&sysib.lpar_num, 0);
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sysib.lcpuc = 0;
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/* XXX change when SMP comes */
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stw_p(&sysib.total_cpus, 1);
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stw_p(&sysib.conf_cpus, 1);
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stw_p(&sysib.standby_cpus, 0);
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stw_p(&sysib.reserved_cpus, 0);
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ebcdic_put(sysib.name, "QEMU ", 8);
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stl_p(&sysib.caf, 1000);
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stw_p(&sysib.dedicated_cpus, 0);
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stw_p(&sysib.shared_cpus, 0);
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cpu_physical_memory_write(a0, &sysib, sizeof(sysib));
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} else {
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cc = 3;
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}
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break;
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}
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case STSI_LEVEL_3:
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{
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if ((sel1 == 2) && (sel2 == 2)) {
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/* VM CPUs */
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struct sysib_322 sysib;
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memset(&sysib, 0, sizeof(sysib));
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sysib.count = 1;
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/* XXX change when SMP comes */
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stw_p(&sysib.vm[0].total_cpus, 1);
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stw_p(&sysib.vm[0].conf_cpus, 1);
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stw_p(&sysib.vm[0].standby_cpus, 0);
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stw_p(&sysib.vm[0].reserved_cpus, 0);
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ebcdic_put(sysib.vm[0].name, "KVMguest", 8);
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stl_p(&sysib.vm[0].caf, 1000);
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ebcdic_put(sysib.vm[0].cpi, "KVM/Linux ", 16);
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cpu_physical_memory_write(a0, &sysib, sizeof(sysib));
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} else {
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cc = 3;
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}
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break;
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}
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case STSI_LEVEL_CURRENT:
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env->regs[0] = STSI_LEVEL_3;
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break;
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default:
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cc = 3;
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break;
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}
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return cc;
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}
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uint32_t HELPER(sigp)(CPUS390XState *env, uint64_t order_code, uint32_t r1,
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uint64_t cpu_addr)
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{
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int cc = SIGP_CC_ORDER_CODE_ACCEPTED;
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HELPER_LOG("%s: %016" PRIx64 " %08x %016" PRIx64 "\n",
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__func__, order_code, r1, cpu_addr);
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/* Remember: Use "R1 or R1 + 1, whichever is the odd-numbered register"
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as parameter (input). Status (output) is always R1. */
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switch (order_code & SIGP_ORDER_MASK) {
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case SIGP_SET_ARCH:
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/* switch arch */
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break;
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case SIGP_SENSE:
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/* enumerate CPU status */
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if (cpu_addr) {
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/* XXX implement when SMP comes */
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return 3;
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}
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env->regs[r1] &= 0xffffffff00000000ULL;
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cc = 1;
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break;
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#if !defined(CONFIG_USER_ONLY)
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case SIGP_RESTART:
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qemu_system_reset_request(SHUTDOWN_CAUSE_GUEST_RESET);
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cpu_loop_exit(CPU(s390_env_get_cpu(env)));
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break;
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case SIGP_STOP:
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qemu_system_shutdown_request(SHUTDOWN_CAUSE_GUEST_SHUTDOWN);
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cpu_loop_exit(CPU(s390_env_get_cpu(env)));
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break;
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#endif
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default:
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/* unknown sigp */
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fprintf(stderr, "XXX unknown sigp: 0x%" PRIx64 "\n", order_code);
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cc = SIGP_CC_NOT_OPERATIONAL;
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}
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return cc;
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}
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#endif
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#ifndef CONFIG_USER_ONLY
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void HELPER(xsch)(CPUS390XState *env, uint64_t r1)
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{
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S390CPU *cpu = s390_env_get_cpu(env);
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qemu_mutex_lock_iothread();
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ioinst_handle_xsch(cpu, r1);
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qemu_mutex_unlock_iothread();
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}
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void HELPER(csch)(CPUS390XState *env, uint64_t r1)
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{
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S390CPU *cpu = s390_env_get_cpu(env);
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qemu_mutex_lock_iothread();
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ioinst_handle_csch(cpu, r1);
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qemu_mutex_unlock_iothread();
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}
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void HELPER(hsch)(CPUS390XState *env, uint64_t r1)
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{
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S390CPU *cpu = s390_env_get_cpu(env);
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qemu_mutex_lock_iothread();
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ioinst_handle_hsch(cpu, r1);
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qemu_mutex_unlock_iothread();
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}
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void HELPER(msch)(CPUS390XState *env, uint64_t r1, uint64_t inst)
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{
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S390CPU *cpu = s390_env_get_cpu(env);
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qemu_mutex_lock_iothread();
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ioinst_handle_msch(cpu, r1, inst >> 16);
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qemu_mutex_unlock_iothread();
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}
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void HELPER(rchp)(CPUS390XState *env, uint64_t r1)
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{
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S390CPU *cpu = s390_env_get_cpu(env);
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qemu_mutex_lock_iothread();
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ioinst_handle_rchp(cpu, r1);
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qemu_mutex_unlock_iothread();
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}
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void HELPER(rsch)(CPUS390XState *env, uint64_t r1)
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{
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S390CPU *cpu = s390_env_get_cpu(env);
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qemu_mutex_lock_iothread();
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ioinst_handle_rsch(cpu, r1);
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qemu_mutex_unlock_iothread();
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}
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void HELPER(ssch)(CPUS390XState *env, uint64_t r1, uint64_t inst)
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{
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S390CPU *cpu = s390_env_get_cpu(env);
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qemu_mutex_lock_iothread();
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ioinst_handle_ssch(cpu, r1, inst >> 16);
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qemu_mutex_unlock_iothread();
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}
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void HELPER(stsch)(CPUS390XState *env, uint64_t r1, uint64_t inst)
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{
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S390CPU *cpu = s390_env_get_cpu(env);
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qemu_mutex_lock_iothread();
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ioinst_handle_stsch(cpu, r1, inst >> 16);
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qemu_mutex_unlock_iothread();
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}
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void HELPER(tsch)(CPUS390XState *env, uint64_t r1, uint64_t inst)
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{
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S390CPU *cpu = s390_env_get_cpu(env);
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qemu_mutex_lock_iothread();
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ioinst_handle_tsch(cpu, r1, inst >> 16);
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qemu_mutex_unlock_iothread();
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}
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void HELPER(chsc)(CPUS390XState *env, uint64_t inst)
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{
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S390CPU *cpu = s390_env_get_cpu(env);
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qemu_mutex_lock_iothread();
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ioinst_handle_chsc(cpu, inst >> 16);
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qemu_mutex_unlock_iothread();
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}
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#endif
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|
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#ifndef CONFIG_USER_ONLY
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void HELPER(per_check_exception)(CPUS390XState *env)
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{
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uint32_t ilen;
|
|
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if (env->per_perc_atmid) {
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/*
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* FIXME: ILEN_AUTO is most probably the right thing to use. ilen
|
|
* always has to match the instruction referenced in the PSW. E.g.
|
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* if a PER interrupt is triggered via EXECUTE, we have to use ilen
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* of EXECUTE, while per_address contains the target of EXECUTE.
|
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*/
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ilen = get_ilen(cpu_ldub_code(env, env->per_address));
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program_interrupt(env, PGM_PER, ilen);
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}
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}
|
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|
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/* Check if an address is within the PER starting address and the PER
|
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ending address. The address range might loop. */
|
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static inline bool get_per_in_range(CPUS390XState *env, uint64_t addr)
|
|
{
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if (env->cregs[10] <= env->cregs[11]) {
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return env->cregs[10] <= addr && addr <= env->cregs[11];
|
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} else {
|
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return env->cregs[10] <= addr || addr <= env->cregs[11];
|
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}
|
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}
|
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|
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void HELPER(per_branch)(CPUS390XState *env, uint64_t from, uint64_t to)
|
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{
|
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if ((env->cregs[9] & PER_CR9_EVENT_BRANCH)) {
|
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if (!(env->cregs[9] & PER_CR9_CONTROL_BRANCH_ADDRESS)
|
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|| get_per_in_range(env, to)) {
|
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env->per_address = from;
|
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env->per_perc_atmid = PER_CODE_EVENT_BRANCH | get_per_atmid(env);
|
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}
|
|
}
|
|
}
|
|
|
|
void HELPER(per_ifetch)(CPUS390XState *env, uint64_t addr)
|
|
{
|
|
if ((env->cregs[9] & PER_CR9_EVENT_IFETCH) && get_per_in_range(env, addr)) {
|
|
env->per_address = addr;
|
|
env->per_perc_atmid = PER_CODE_EVENT_IFETCH | get_per_atmid(env);
|
|
|
|
/* If the instruction has to be nullified, trigger the
|
|
exception immediately. */
|
|
if (env->cregs[9] & PER_CR9_EVENT_NULLIFICATION) {
|
|
CPUState *cs = CPU(s390_env_get_cpu(env));
|
|
|
|
env->per_perc_atmid |= PER_CODE_EVENT_NULLIFICATION;
|
|
env->int_pgm_code = PGM_PER;
|
|
env->int_pgm_ilen = get_ilen(cpu_ldub_code(env, addr));
|
|
|
|
cs->exception_index = EXCP_PGM;
|
|
cpu_loop_exit(cs);
|
|
}
|
|
}
|
|
}
|
|
#endif
|
|
|
|
/* The maximum bit defined at the moment is 129. */
|
|
#define MAX_STFL_WORDS 3
|
|
|
|
/* Canonicalize the current cpu's features into the 64-bit words required
|
|
by STFLE. Return the index-1 of the max word that is non-zero. */
|
|
static unsigned do_stfle(CPUS390XState *env, uint64_t words[MAX_STFL_WORDS])
|
|
{
|
|
S390CPU *cpu = s390_env_get_cpu(env);
|
|
const unsigned long *features = cpu->model->features;
|
|
unsigned max_bit = 0;
|
|
S390Feat feat;
|
|
|
|
memset(words, 0, sizeof(uint64_t) * MAX_STFL_WORDS);
|
|
|
|
if (test_bit(S390_FEAT_ZARCH, features)) {
|
|
/* z/Architecture is always active if around */
|
|
words[0] = 1ull << (63 - 2);
|
|
}
|
|
|
|
for (feat = find_first_bit(features, S390_FEAT_MAX);
|
|
feat < S390_FEAT_MAX;
|
|
feat = find_next_bit(features, S390_FEAT_MAX, feat + 1)) {
|
|
const S390FeatDef *def = s390_feat_def(feat);
|
|
if (def->type == S390_FEAT_TYPE_STFL) {
|
|
unsigned bit = def->bit;
|
|
if (bit > max_bit) {
|
|
max_bit = bit;
|
|
}
|
|
assert(bit / 64 < MAX_STFL_WORDS);
|
|
words[bit / 64] |= 1ULL << (63 - bit % 64);
|
|
}
|
|
}
|
|
|
|
return max_bit / 64;
|
|
}
|
|
|
|
void HELPER(stfl)(CPUS390XState *env)
|
|
{
|
|
uint64_t words[MAX_STFL_WORDS];
|
|
|
|
do_stfle(env, words);
|
|
cpu_stl_data(env, 200, words[0] >> 32);
|
|
}
|
|
|
|
uint32_t HELPER(stfle)(CPUS390XState *env, uint64_t addr)
|
|
{
|
|
uint64_t words[MAX_STFL_WORDS];
|
|
unsigned count_m1 = env->regs[0] & 0xff;
|
|
unsigned max_m1 = do_stfle(env, words);
|
|
unsigned i;
|
|
|
|
for (i = 0; i <= count_m1; ++i) {
|
|
cpu_stq_data(env, addr + 8 * i, words[i]);
|
|
}
|
|
|
|
env->regs[0] = deposit64(env->regs[0], 0, 8, max_m1);
|
|
return (count_m1 >= max_m1 ? 0 : 3);
|
|
}
|