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/*
* S390x DIAG instruction helper functions
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*/
#include "qemu/osdep.h"
#include "cpu.h"
#include "s390x-internal.h"
#include "hw/watchdog/wdt_diag288.h"
#include "sysemu/cpus.h"
#include "hw/s390x/ipl.h"
#include "hw/s390x/s390-virtio-ccw.h"
#include "hw/s390x/pv.h"
#include "sysemu/kvm.h"
#include "kvm/kvm_s390x.h"
int handle_diag_288(CPUS390XState *env, uint64_t r1, uint64_t r3)
{
uint64_t func = env->regs[r1];
uint64_t timeout = env->regs[r1 + 1];
uint64_t action = env->regs[r3];
Object *obj;
DIAG288State *diag288;
DIAG288Class *diag288_class;
if (r1 % 2 || action != 0) {
return -1;
}
/* Timeout must be more than 15 seconds except for timer deletion */
if (func != WDT_DIAG288_CANCEL && timeout < 15) {
return -1;
}
obj = object_resolve_path_type("", TYPE_WDT_DIAG288, NULL);
if (!obj) {
return -1;
}
diag288 = DIAG288(obj);
diag288_class = DIAG288_GET_CLASS(diag288);
return diag288_class->handle_timer(diag288, func, timeout);
}
static int diag308_parm_check(CPUS390XState *env, uint64_t r1, uint64_t addr,
uintptr_t ra, bool write)
{
/* Handled by the Ultravisor */
if (s390_is_pv()) {
return 0;
}
if ((r1 & 1) || (addr & ~TARGET_PAGE_MASK)) {
s390_program_interrupt(env, PGM_SPECIFICATION, ra);
return -1;
}
if (!address_space_access_valid(&address_space_memory, addr,
sizeof(IplParameterBlock), write,
MEMTXATTRS_UNSPECIFIED)) {
s390_program_interrupt(env, PGM_ADDRESSING, ra);
return -1;
}
return 0;
}
void handle_diag_308(CPUS390XState *env, uint64_t r1, uint64_t r3, uintptr_t ra)
{
bool valid;
CPUState *cs = env_cpu(env);
S390CPU *cpu = S390_CPU(cs);
uint64_t addr = env->regs[r1];
uint64_t subcode = env->regs[r3];
IplParameterBlock *iplb;
if (env->psw.mask & PSW_MASK_PSTATE) {
s390_program_interrupt(env, PGM_PRIVILEGED, ra);
return;
}
if (subcode & ~0x0ffffULL) {
s390_program_interrupt(env, PGM_SPECIFICATION, ra);
return;
}
if (subcode >= DIAG308_PV_SET && !s390_has_feat(S390_FEAT_UNPACK)) {
s390_program_interrupt(env, PGM_SPECIFICATION, ra);
return;
}
switch (subcode) {
case DIAG308_RESET_MOD_CLR:
s390_ipl_reset_request(cs, S390_RESET_MODIFIED_CLEAR);
break;
case DIAG308_RESET_LOAD_NORM:
s390_ipl_reset_request(cs, S390_RESET_LOAD_NORMAL);
break;
case DIAG308_LOAD_CLEAR:
/* Well we still lack the clearing bit... */
s390_ipl_reset_request(cs, S390_RESET_REIPL);
break;
case DIAG308_SET:
case DIAG308_PV_SET:
if (diag308_parm_check(env, r1, addr, ra, false)) {
return;
}
iplb = g_new0(IplParameterBlock, 1);
if (!s390_is_pv()) {
cpu_physical_memory_read(addr, iplb, sizeof(iplb->len));
} else {
s390_cpu_pv_mem_read(cpu, 0, iplb, sizeof(iplb->len));
}
if (!iplb_valid_len(iplb)) {
env->regs[r1 + 1] = DIAG_308_RC_INVALID;
goto out;
}
if (!s390_is_pv()) {
cpu_physical_memory_read(addr, iplb, be32_to_cpu(iplb->len));
} else {
s390_cpu_pv_mem_read(cpu, 0, iplb, be32_to_cpu(iplb->len));
}
valid = subcode == DIAG308_PV_SET ? iplb_valid_pv(iplb) : iplb_valid(iplb);
if (!valid) {
env->regs[r1 + 1] = DIAG_308_RC_INVALID;
goto out;
}
s390_ipl_update_diag308(iplb);
env->regs[r1 + 1] = DIAG_308_RC_OK;
out:
g_free(iplb);
return;
case DIAG308_STORE:
case DIAG308_PV_STORE:
if (diag308_parm_check(env, r1, addr, ra, true)) {
return;
}
if (subcode == DIAG308_PV_STORE) {
iplb = s390_ipl_get_iplb_pv();
} else {
iplb = s390_ipl_get_iplb();
}
if (!iplb) {
env->regs[r1 + 1] = DIAG_308_RC_NO_CONF;
return;
}
if (!s390_is_pv()) {
cpu_physical_memory_write(addr, iplb, be32_to_cpu(iplb->len));
} else {
s390_cpu_pv_mem_write(cpu, 0, iplb, be32_to_cpu(iplb->len));
}
env->regs[r1 + 1] = DIAG_308_RC_OK;
return;
case DIAG308_PV_START:
iplb = s390_ipl_get_iplb_pv();
if (!iplb) {
env->regs[r1 + 1] = DIAG_308_RC_NO_PV_CONF;
return;
}
if (kvm_enabled() && kvm_s390_get_hpage_1m()) {
error_report("Protected VMs can currently not be backed with "
"huge pages");
env->regs[r1 + 1] = DIAG_308_RC_INVAL_FOR_PV;
return;
}
s390_ipl_reset_request(cs, S390_RESET_PV);
break;
default:
s390_program_interrupt(env, PGM_SPECIFICATION, ra);
break;
}
}
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