398 lines
12 KiB
C
398 lines
12 KiB
C
/*
|
|
* QEMU PowerPC pSeries Logical Partition (aka sPAPR) hardware System Emulator
|
|
*
|
|
* Hypercall based emulated RTAS
|
|
*
|
|
* Copyright (c) 2010-2011 David Gibson, IBM Corporation.
|
|
*
|
|
* Permission is hereby granted, free of charge, to any person obtaining a copy
|
|
* of this software and associated documentation files (the "Software"), to deal
|
|
* in the Software without restriction, including without limitation the rights
|
|
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
|
|
* copies of the Software, and to permit persons to whom the Software is
|
|
* furnished to do so, subject to the following conditions:
|
|
*
|
|
* The above copyright notice and this permission notice shall be included in
|
|
* all copies or substantial portions of the Software.
|
|
*
|
|
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
|
|
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
|
|
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
|
|
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
|
|
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
|
|
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
|
|
* THE SOFTWARE.
|
|
*
|
|
*/
|
|
#include "cpu.h"
|
|
#include "sysemu/sysemu.h"
|
|
#include "sysemu/char.h"
|
|
#include "hw/qdev.h"
|
|
#include "sysemu/device_tree.h"
|
|
|
|
#include "hw/ppc/spapr.h"
|
|
#include "hw/ppc/spapr_vio.h"
|
|
|
|
#include <libfdt.h>
|
|
|
|
#define TOKEN_BASE 0x2000
|
|
#define TOKEN_MAX 0x100
|
|
|
|
static void rtas_display_character(PowerPCCPU *cpu, sPAPREnvironment *spapr,
|
|
uint32_t token, uint32_t nargs,
|
|
target_ulong args,
|
|
uint32_t nret, target_ulong rets)
|
|
{
|
|
uint8_t c = rtas_ld(args, 0);
|
|
VIOsPAPRDevice *sdev = vty_lookup(spapr, 0);
|
|
|
|
if (!sdev) {
|
|
rtas_st(rets, 0, RTAS_OUT_HW_ERROR);
|
|
} else {
|
|
vty_putchars(sdev, &c, sizeof(c));
|
|
rtas_st(rets, 0, RTAS_OUT_SUCCESS);
|
|
}
|
|
}
|
|
|
|
static void rtas_get_time_of_day(PowerPCCPU *cpu, sPAPREnvironment *spapr,
|
|
uint32_t token, uint32_t nargs,
|
|
target_ulong args,
|
|
uint32_t nret, target_ulong rets)
|
|
{
|
|
struct tm tm;
|
|
|
|
if (nret != 8) {
|
|
rtas_st(rets, 0, RTAS_OUT_PARAM_ERROR);
|
|
return;
|
|
}
|
|
|
|
qemu_get_timedate(&tm, spapr->rtc_offset);
|
|
|
|
rtas_st(rets, 0, RTAS_OUT_SUCCESS);
|
|
rtas_st(rets, 1, tm.tm_year + 1900);
|
|
rtas_st(rets, 2, tm.tm_mon + 1);
|
|
rtas_st(rets, 3, tm.tm_mday);
|
|
rtas_st(rets, 4, tm.tm_hour);
|
|
rtas_st(rets, 5, tm.tm_min);
|
|
rtas_st(rets, 6, tm.tm_sec);
|
|
rtas_st(rets, 7, 0); /* we don't do nanoseconds */
|
|
}
|
|
|
|
static void rtas_set_time_of_day(PowerPCCPU *cpu, sPAPREnvironment *spapr,
|
|
uint32_t token, uint32_t nargs,
|
|
target_ulong args,
|
|
uint32_t nret, target_ulong rets)
|
|
{
|
|
struct tm tm;
|
|
|
|
tm.tm_year = rtas_ld(args, 0) - 1900;
|
|
tm.tm_mon = rtas_ld(args, 1) - 1;
|
|
tm.tm_mday = rtas_ld(args, 2);
|
|
tm.tm_hour = rtas_ld(args, 3);
|
|
tm.tm_min = rtas_ld(args, 4);
|
|
tm.tm_sec = rtas_ld(args, 5);
|
|
|
|
/* Just generate a monitor event for the change */
|
|
rtc_change_mon_event(&tm);
|
|
spapr->rtc_offset = qemu_timedate_diff(&tm);
|
|
|
|
rtas_st(rets, 0, RTAS_OUT_SUCCESS);
|
|
}
|
|
|
|
static void rtas_power_off(PowerPCCPU *cpu, sPAPREnvironment *spapr,
|
|
uint32_t token, uint32_t nargs, target_ulong args,
|
|
uint32_t nret, target_ulong rets)
|
|
{
|
|
if (nargs != 2 || nret != 1) {
|
|
rtas_st(rets, 0, RTAS_OUT_PARAM_ERROR);
|
|
return;
|
|
}
|
|
qemu_system_shutdown_request();
|
|
rtas_st(rets, 0, RTAS_OUT_SUCCESS);
|
|
}
|
|
|
|
static void rtas_system_reboot(PowerPCCPU *cpu, sPAPREnvironment *spapr,
|
|
uint32_t token, uint32_t nargs,
|
|
target_ulong args,
|
|
uint32_t nret, target_ulong rets)
|
|
{
|
|
if (nargs != 0 || nret != 1) {
|
|
rtas_st(rets, 0, RTAS_OUT_PARAM_ERROR);
|
|
return;
|
|
}
|
|
qemu_system_reset_request();
|
|
rtas_st(rets, 0, RTAS_OUT_SUCCESS);
|
|
}
|
|
|
|
static void rtas_query_cpu_stopped_state(PowerPCCPU *cpu_,
|
|
sPAPREnvironment *spapr,
|
|
uint32_t token, uint32_t nargs,
|
|
target_ulong args,
|
|
uint32_t nret, target_ulong rets)
|
|
{
|
|
target_ulong id;
|
|
PowerPCCPU *cpu;
|
|
|
|
if (nargs != 1 || nret != 2) {
|
|
rtas_st(rets, 0, RTAS_OUT_PARAM_ERROR);
|
|
return;
|
|
}
|
|
|
|
id = rtas_ld(args, 0);
|
|
cpu = ppc_get_vcpu_by_dt_id(id);
|
|
if (cpu != NULL) {
|
|
if (CPU(cpu)->halted) {
|
|
rtas_st(rets, 1, 0);
|
|
} else {
|
|
rtas_st(rets, 1, 2);
|
|
}
|
|
|
|
rtas_st(rets, 0, RTAS_OUT_SUCCESS);
|
|
return;
|
|
}
|
|
|
|
/* Didn't find a matching cpu */
|
|
rtas_st(rets, 0, RTAS_OUT_PARAM_ERROR);
|
|
}
|
|
|
|
static void rtas_start_cpu(PowerPCCPU *cpu_, sPAPREnvironment *spapr,
|
|
uint32_t token, uint32_t nargs,
|
|
target_ulong args,
|
|
uint32_t nret, target_ulong rets)
|
|
{
|
|
target_ulong id, start, r3;
|
|
PowerPCCPU *cpu;
|
|
|
|
if (nargs != 3 || nret != 1) {
|
|
rtas_st(rets, 0, RTAS_OUT_PARAM_ERROR);
|
|
return;
|
|
}
|
|
|
|
id = rtas_ld(args, 0);
|
|
start = rtas_ld(args, 1);
|
|
r3 = rtas_ld(args, 2);
|
|
|
|
cpu = ppc_get_vcpu_by_dt_id(id);
|
|
if (cpu != NULL) {
|
|
CPUState *cs = CPU(cpu);
|
|
CPUPPCState *env = &cpu->env;
|
|
|
|
if (!cs->halted) {
|
|
rtas_st(rets, 0, RTAS_OUT_HW_ERROR);
|
|
return;
|
|
}
|
|
|
|
/* This will make sure qemu state is up to date with kvm, and
|
|
* mark it dirty so our changes get flushed back before the
|
|
* new cpu enters */
|
|
kvm_cpu_synchronize_state(cs);
|
|
|
|
env->msr = (1ULL << MSR_SF) | (1ULL << MSR_ME);
|
|
env->nip = start;
|
|
env->gpr[3] = r3;
|
|
cs->halted = 0;
|
|
|
|
qemu_cpu_kick(cs);
|
|
|
|
rtas_st(rets, 0, RTAS_OUT_SUCCESS);
|
|
return;
|
|
}
|
|
|
|
/* Didn't find a matching cpu */
|
|
rtas_st(rets, 0, RTAS_OUT_PARAM_ERROR);
|
|
}
|
|
|
|
static void rtas_stop_self(PowerPCCPU *cpu, sPAPREnvironment *spapr,
|
|
uint32_t token, uint32_t nargs,
|
|
target_ulong args,
|
|
uint32_t nret, target_ulong rets)
|
|
{
|
|
CPUState *cs = CPU(cpu);
|
|
CPUPPCState *env = &cpu->env;
|
|
|
|
cs->halted = 1;
|
|
cpu_exit(cs);
|
|
/*
|
|
* While stopping a CPU, the guest calls H_CPPR which
|
|
* effectively disables interrupts on XICS level.
|
|
* However decrementer interrupts in TCG can still
|
|
* wake the CPU up so here we disable interrupts in MSR
|
|
* as well.
|
|
* As rtas_start_cpu() resets the whole MSR anyway, there is
|
|
* no need to bother with specific bits, we just clear it.
|
|
*/
|
|
env->msr = 0;
|
|
}
|
|
|
|
#define DIAGNOSTICS_RUN_MODE 42
|
|
|
|
static void rtas_ibm_get_system_parameter(PowerPCCPU *cpu,
|
|
sPAPREnvironment *spapr,
|
|
uint32_t token, uint32_t nargs,
|
|
target_ulong args,
|
|
uint32_t nret, target_ulong rets)
|
|
{
|
|
target_ulong parameter = rtas_ld(args, 0);
|
|
target_ulong buffer = rtas_ld(args, 1);
|
|
target_ulong length = rtas_ld(args, 2);
|
|
target_ulong ret = RTAS_OUT_NOT_SUPPORTED;
|
|
|
|
switch (parameter) {
|
|
case DIAGNOSTICS_RUN_MODE:
|
|
if (length == 1) {
|
|
rtas_st(buffer, 0, 0);
|
|
ret = RTAS_OUT_SUCCESS;
|
|
}
|
|
break;
|
|
}
|
|
|
|
rtas_st(rets, 0, ret);
|
|
}
|
|
|
|
static void rtas_ibm_set_system_parameter(PowerPCCPU *cpu,
|
|
sPAPREnvironment *spapr,
|
|
uint32_t token, uint32_t nargs,
|
|
target_ulong args,
|
|
uint32_t nret, target_ulong rets)
|
|
{
|
|
target_ulong parameter = rtas_ld(args, 0);
|
|
target_ulong ret = RTAS_OUT_NOT_SUPPORTED;
|
|
|
|
switch (parameter) {
|
|
case DIAGNOSTICS_RUN_MODE:
|
|
ret = RTAS_OUT_NOT_AUTHORIZED;
|
|
break;
|
|
}
|
|
|
|
rtas_st(rets, 0, ret);
|
|
}
|
|
|
|
static struct rtas_call {
|
|
const char *name;
|
|
spapr_rtas_fn fn;
|
|
} rtas_table[TOKEN_MAX];
|
|
|
|
static struct rtas_call *rtas_next = rtas_table;
|
|
|
|
target_ulong spapr_rtas_call(PowerPCCPU *cpu, sPAPREnvironment *spapr,
|
|
uint32_t token, uint32_t nargs, target_ulong args,
|
|
uint32_t nret, target_ulong rets)
|
|
{
|
|
if ((token >= TOKEN_BASE)
|
|
&& ((token - TOKEN_BASE) < TOKEN_MAX)) {
|
|
struct rtas_call *call = rtas_table + (token - TOKEN_BASE);
|
|
|
|
if (call->fn) {
|
|
call->fn(cpu, spapr, token, nargs, args, nret, rets);
|
|
return H_SUCCESS;
|
|
}
|
|
}
|
|
|
|
/* HACK: Some Linux early debug code uses RTAS display-character,
|
|
* but assumes the token value is 0xa (which it is on some real
|
|
* machines) without looking it up in the device tree. This
|
|
* special case makes this work */
|
|
if (token == 0xa) {
|
|
rtas_display_character(cpu, spapr, 0xa, nargs, args, nret, rets);
|
|
return H_SUCCESS;
|
|
}
|
|
|
|
hcall_dprintf("Unknown RTAS token 0x%x\n", token);
|
|
rtas_st(rets, 0, RTAS_OUT_PARAM_ERROR);
|
|
return H_PARAMETER;
|
|
}
|
|
|
|
int spapr_rtas_register(const char *name, spapr_rtas_fn fn)
|
|
{
|
|
int i;
|
|
|
|
for (i = 0; i < (rtas_next - rtas_table); i++) {
|
|
if (strcmp(name, rtas_table[i].name) == 0) {
|
|
fprintf(stderr, "RTAS call \"%s\" registered twice\n", name);
|
|
exit(1);
|
|
}
|
|
}
|
|
|
|
assert(rtas_next < (rtas_table + TOKEN_MAX));
|
|
|
|
rtas_next->name = name;
|
|
rtas_next->fn = fn;
|
|
|
|
return (rtas_next++ - rtas_table) + TOKEN_BASE;
|
|
}
|
|
|
|
int spapr_rtas_device_tree_setup(void *fdt, hwaddr rtas_addr,
|
|
hwaddr rtas_size)
|
|
{
|
|
int ret;
|
|
int i;
|
|
|
|
ret = fdt_add_mem_rsv(fdt, rtas_addr, rtas_size);
|
|
if (ret < 0) {
|
|
fprintf(stderr, "Couldn't add RTAS reserve entry: %s\n",
|
|
fdt_strerror(ret));
|
|
return ret;
|
|
}
|
|
|
|
ret = qemu_fdt_setprop_cell(fdt, "/rtas", "linux,rtas-base",
|
|
rtas_addr);
|
|
if (ret < 0) {
|
|
fprintf(stderr, "Couldn't add linux,rtas-base property: %s\n",
|
|
fdt_strerror(ret));
|
|
return ret;
|
|
}
|
|
|
|
ret = qemu_fdt_setprop_cell(fdt, "/rtas", "linux,rtas-entry",
|
|
rtas_addr);
|
|
if (ret < 0) {
|
|
fprintf(stderr, "Couldn't add linux,rtas-entry property: %s\n",
|
|
fdt_strerror(ret));
|
|
return ret;
|
|
}
|
|
|
|
ret = qemu_fdt_setprop_cell(fdt, "/rtas", "rtas-size",
|
|
rtas_size);
|
|
if (ret < 0) {
|
|
fprintf(stderr, "Couldn't add rtas-size property: %s\n",
|
|
fdt_strerror(ret));
|
|
return ret;
|
|
}
|
|
|
|
for (i = 0; i < TOKEN_MAX; i++) {
|
|
struct rtas_call *call = &rtas_table[i];
|
|
|
|
if (!call->name) {
|
|
continue;
|
|
}
|
|
|
|
ret = qemu_fdt_setprop_cell(fdt, "/rtas", call->name,
|
|
i + TOKEN_BASE);
|
|
if (ret < 0) {
|
|
fprintf(stderr, "Couldn't add rtas token for %s: %s\n",
|
|
call->name, fdt_strerror(ret));
|
|
return ret;
|
|
}
|
|
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static void core_rtas_register_types(void)
|
|
{
|
|
spapr_rtas_register("display-character", rtas_display_character);
|
|
spapr_rtas_register("get-time-of-day", rtas_get_time_of_day);
|
|
spapr_rtas_register("set-time-of-day", rtas_set_time_of_day);
|
|
spapr_rtas_register("power-off", rtas_power_off);
|
|
spapr_rtas_register("system-reboot", rtas_system_reboot);
|
|
spapr_rtas_register("query-cpu-stopped-state",
|
|
rtas_query_cpu_stopped_state);
|
|
spapr_rtas_register("start-cpu", rtas_start_cpu);
|
|
spapr_rtas_register("stop-self", rtas_stop_self);
|
|
spapr_rtas_register("ibm,get-system-parameter",
|
|
rtas_ibm_get_system_parameter);
|
|
spapr_rtas_register("ibm,set-system-parameter",
|
|
rtas_ibm_set_system_parameter);
|
|
}
|
|
|
|
type_init(core_rtas_register_types)
|