094d20585e
These interfaces manage the power domains that guest devices are assigned to and are used to power on/off devices. Currently we only utilize 1 power domain, the 'live-insertion' domain, which automates power management of plugged/unplugged devices, essentially making these calls no-ops, but the RTAS interfaces are still required by guest hotplug code and PAPR+. See docs/specs/ppc-spapr-hotplug.txt for a complete description of these interfaces. Signed-off-by: Nathan Fontenot <nfont@linux.vnet.ibm.com> Signed-off-by: Michael Roth <mdroth@linux.vnet.ibm.com> Reviewed-by: David Gibson <david@gibson.dropbear.id.au> Signed-off-by: David Gibson <david@gibson.dropbear.id.au> Signed-off-by: Alexander Graf <agraf@suse.de>
430 lines
14 KiB
C
430 lines
14 KiB
C
/*
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* QEMU PowerPC pSeries Logical Partition (aka sPAPR) hardware System Emulator
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*
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* Hypercall based emulated RTAS
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*
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* Copyright (c) 2010-2011 David Gibson, IBM Corporation.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*
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*/
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#include "cpu.h"
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#include "sysemu/sysemu.h"
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#include "sysemu/char.h"
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#include "hw/qdev.h"
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#include "sysemu/device_tree.h"
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#include "hw/ppc/spapr.h"
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#include "hw/ppc/spapr_vio.h"
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#include "qapi-event.h"
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#include <libfdt.h>
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static void rtas_display_character(PowerPCCPU *cpu, sPAPREnvironment *spapr,
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uint32_t token, uint32_t nargs,
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target_ulong args,
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uint32_t nret, target_ulong rets)
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{
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uint8_t c = rtas_ld(args, 0);
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VIOsPAPRDevice *sdev = vty_lookup(spapr, 0);
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if (!sdev) {
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rtas_st(rets, 0, RTAS_OUT_HW_ERROR);
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} else {
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vty_putchars(sdev, &c, sizeof(c));
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rtas_st(rets, 0, RTAS_OUT_SUCCESS);
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}
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}
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static void rtas_power_off(PowerPCCPU *cpu, sPAPREnvironment *spapr,
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uint32_t token, uint32_t nargs, target_ulong args,
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uint32_t nret, target_ulong rets)
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{
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if (nargs != 2 || nret != 1) {
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rtas_st(rets, 0, RTAS_OUT_PARAM_ERROR);
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return;
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}
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qemu_system_shutdown_request();
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rtas_st(rets, 0, RTAS_OUT_SUCCESS);
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}
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static void rtas_system_reboot(PowerPCCPU *cpu, sPAPREnvironment *spapr,
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uint32_t token, uint32_t nargs,
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target_ulong args,
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uint32_t nret, target_ulong rets)
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{
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if (nargs != 0 || nret != 1) {
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rtas_st(rets, 0, RTAS_OUT_PARAM_ERROR);
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return;
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}
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qemu_system_reset_request();
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rtas_st(rets, 0, RTAS_OUT_SUCCESS);
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}
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static void rtas_query_cpu_stopped_state(PowerPCCPU *cpu_,
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sPAPREnvironment *spapr,
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uint32_t token, uint32_t nargs,
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target_ulong args,
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uint32_t nret, target_ulong rets)
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{
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target_ulong id;
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PowerPCCPU *cpu;
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if (nargs != 1 || nret != 2) {
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rtas_st(rets, 0, RTAS_OUT_PARAM_ERROR);
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return;
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}
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id = rtas_ld(args, 0);
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cpu = ppc_get_vcpu_by_dt_id(id);
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if (cpu != NULL) {
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if (CPU(cpu)->halted) {
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rtas_st(rets, 1, 0);
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} else {
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rtas_st(rets, 1, 2);
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}
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rtas_st(rets, 0, RTAS_OUT_SUCCESS);
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return;
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}
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/* Didn't find a matching cpu */
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rtas_st(rets, 0, RTAS_OUT_PARAM_ERROR);
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}
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static void rtas_start_cpu(PowerPCCPU *cpu_, sPAPREnvironment *spapr,
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uint32_t token, uint32_t nargs,
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target_ulong args,
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uint32_t nret, target_ulong rets)
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{
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target_ulong id, start, r3;
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PowerPCCPU *cpu;
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if (nargs != 3 || nret != 1) {
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rtas_st(rets, 0, RTAS_OUT_PARAM_ERROR);
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return;
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}
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id = rtas_ld(args, 0);
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start = rtas_ld(args, 1);
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r3 = rtas_ld(args, 2);
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cpu = ppc_get_vcpu_by_dt_id(id);
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if (cpu != NULL) {
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CPUState *cs = CPU(cpu);
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CPUPPCState *env = &cpu->env;
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if (!cs->halted) {
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rtas_st(rets, 0, RTAS_OUT_HW_ERROR);
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return;
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}
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/* This will make sure qemu state is up to date with kvm, and
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* mark it dirty so our changes get flushed back before the
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* new cpu enters */
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kvm_cpu_synchronize_state(cs);
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env->msr = (1ULL << MSR_SF) | (1ULL << MSR_ME);
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env->nip = start;
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env->gpr[3] = r3;
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cs->halted = 0;
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qemu_cpu_kick(cs);
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rtas_st(rets, 0, RTAS_OUT_SUCCESS);
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return;
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}
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/* Didn't find a matching cpu */
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rtas_st(rets, 0, RTAS_OUT_PARAM_ERROR);
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}
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static void rtas_stop_self(PowerPCCPU *cpu, sPAPREnvironment *spapr,
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uint32_t token, uint32_t nargs,
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target_ulong args,
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uint32_t nret, target_ulong rets)
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{
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CPUState *cs = CPU(cpu);
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CPUPPCState *env = &cpu->env;
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cs->halted = 1;
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cpu_exit(cs);
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/*
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* While stopping a CPU, the guest calls H_CPPR which
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* effectively disables interrupts on XICS level.
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* However decrementer interrupts in TCG can still
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* wake the CPU up so here we disable interrupts in MSR
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* as well.
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* As rtas_start_cpu() resets the whole MSR anyway, there is
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* no need to bother with specific bits, we just clear it.
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*/
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env->msr = 0;
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}
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static void rtas_ibm_get_system_parameter(PowerPCCPU *cpu,
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sPAPREnvironment *spapr,
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uint32_t token, uint32_t nargs,
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target_ulong args,
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uint32_t nret, target_ulong rets)
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{
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target_ulong parameter = rtas_ld(args, 0);
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target_ulong buffer = rtas_ld(args, 1);
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target_ulong length = rtas_ld(args, 2);
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target_ulong ret = RTAS_OUT_SUCCESS;
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switch (parameter) {
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case RTAS_SYSPARM_SPLPAR_CHARACTERISTICS: {
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char *param_val = g_strdup_printf("MaxEntCap=%d,MaxPlatProcs=%d",
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max_cpus, smp_cpus);
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rtas_st_buffer(buffer, length, (uint8_t *)param_val, strlen(param_val));
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g_free(param_val);
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break;
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}
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case RTAS_SYSPARM_DIAGNOSTICS_RUN_MODE: {
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uint8_t param_val = DIAGNOSTICS_RUN_MODE_DISABLED;
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rtas_st_buffer(buffer, length, ¶m_val, sizeof(param_val));
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break;
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}
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case RTAS_SYSPARM_UUID:
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rtas_st_buffer(buffer, length, qemu_uuid, (qemu_uuid_set ? 16 : 0));
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break;
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default:
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ret = RTAS_OUT_NOT_SUPPORTED;
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}
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rtas_st(rets, 0, ret);
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}
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static void rtas_ibm_set_system_parameter(PowerPCCPU *cpu,
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sPAPREnvironment *spapr,
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uint32_t token, uint32_t nargs,
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target_ulong args,
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uint32_t nret, target_ulong rets)
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{
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target_ulong parameter = rtas_ld(args, 0);
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target_ulong ret = RTAS_OUT_NOT_SUPPORTED;
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switch (parameter) {
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case RTAS_SYSPARM_SPLPAR_CHARACTERISTICS:
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case RTAS_SYSPARM_DIAGNOSTICS_RUN_MODE:
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case RTAS_SYSPARM_UUID:
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ret = RTAS_OUT_NOT_AUTHORIZED;
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break;
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}
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rtas_st(rets, 0, ret);
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}
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static void rtas_ibm_os_term(PowerPCCPU *cpu,
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sPAPREnvironment *spapr,
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uint32_t token, uint32_t nargs,
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target_ulong args,
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uint32_t nret, target_ulong rets)
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{
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target_ulong ret = 0;
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qapi_event_send_guest_panicked(GUEST_PANIC_ACTION_PAUSE, &error_abort);
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rtas_st(rets, 0, ret);
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}
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static void rtas_set_power_level(PowerPCCPU *cpu, sPAPREnvironment *spapr,
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uint32_t token, uint32_t nargs,
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target_ulong args, uint32_t nret,
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target_ulong rets)
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{
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int32_t power_domain;
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if (nargs != 2 || nret != 2) {
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rtas_st(rets, 0, RTAS_OUT_PARAM_ERROR);
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return;
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}
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/* we currently only use a single, "live insert" powerdomain for
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* hotplugged/dlpar'd resources, so the power is always live/full (100)
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*/
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power_domain = rtas_ld(args, 0);
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if (power_domain != -1) {
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rtas_st(rets, 0, RTAS_OUT_NOT_SUPPORTED);
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return;
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}
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rtas_st(rets, 0, RTAS_OUT_SUCCESS);
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rtas_st(rets, 1, 100);
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}
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static void rtas_get_power_level(PowerPCCPU *cpu, sPAPREnvironment *spapr,
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uint32_t token, uint32_t nargs,
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target_ulong args, uint32_t nret,
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target_ulong rets)
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{
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int32_t power_domain;
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if (nargs != 1 || nret != 2) {
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rtas_st(rets, 0, RTAS_OUT_PARAM_ERROR);
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return;
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}
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/* we currently only use a single, "live insert" powerdomain for
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* hotplugged/dlpar'd resources, so the power is always live/full (100)
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*/
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power_domain = rtas_ld(args, 0);
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if (power_domain != -1) {
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rtas_st(rets, 0, RTAS_OUT_NOT_SUPPORTED);
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return;
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}
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rtas_st(rets, 0, RTAS_OUT_SUCCESS);
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rtas_st(rets, 1, 100);
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}
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static struct rtas_call {
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const char *name;
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spapr_rtas_fn fn;
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} rtas_table[RTAS_TOKEN_MAX - RTAS_TOKEN_BASE];
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target_ulong spapr_rtas_call(PowerPCCPU *cpu, sPAPREnvironment *spapr,
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uint32_t token, uint32_t nargs, target_ulong args,
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uint32_t nret, target_ulong rets)
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{
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if ((token >= RTAS_TOKEN_BASE) && (token < RTAS_TOKEN_MAX)) {
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struct rtas_call *call = rtas_table + (token - RTAS_TOKEN_BASE);
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if (call->fn) {
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call->fn(cpu, spapr, token, nargs, args, nret, rets);
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return H_SUCCESS;
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}
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}
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/* HACK: Some Linux early debug code uses RTAS display-character,
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* but assumes the token value is 0xa (which it is on some real
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* machines) without looking it up in the device tree. This
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* special case makes this work */
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if (token == 0xa) {
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rtas_display_character(cpu, spapr, 0xa, nargs, args, nret, rets);
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return H_SUCCESS;
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}
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hcall_dprintf("Unknown RTAS token 0x%x\n", token);
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rtas_st(rets, 0, RTAS_OUT_PARAM_ERROR);
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return H_PARAMETER;
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}
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void spapr_rtas_register(int token, const char *name, spapr_rtas_fn fn)
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{
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if (!((token >= RTAS_TOKEN_BASE) && (token < RTAS_TOKEN_MAX))) {
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fprintf(stderr, "RTAS invalid token 0x%x\n", token);
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exit(1);
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}
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token -= RTAS_TOKEN_BASE;
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if (rtas_table[token].name) {
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fprintf(stderr, "RTAS call \"%s\" is registered already as 0x%x\n",
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rtas_table[token].name, token);
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exit(1);
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}
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rtas_table[token].name = name;
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rtas_table[token].fn = fn;
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}
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int spapr_rtas_device_tree_setup(void *fdt, hwaddr rtas_addr,
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hwaddr rtas_size)
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{
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int ret;
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int i;
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ret = fdt_add_mem_rsv(fdt, rtas_addr, rtas_size);
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if (ret < 0) {
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fprintf(stderr, "Couldn't add RTAS reserve entry: %s\n",
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fdt_strerror(ret));
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return ret;
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}
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ret = qemu_fdt_setprop_cell(fdt, "/rtas", "linux,rtas-base",
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rtas_addr);
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if (ret < 0) {
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fprintf(stderr, "Couldn't add linux,rtas-base property: %s\n",
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fdt_strerror(ret));
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return ret;
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}
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ret = qemu_fdt_setprop_cell(fdt, "/rtas", "linux,rtas-entry",
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rtas_addr);
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if (ret < 0) {
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fprintf(stderr, "Couldn't add linux,rtas-entry property: %s\n",
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fdt_strerror(ret));
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return ret;
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}
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ret = qemu_fdt_setprop_cell(fdt, "/rtas", "rtas-size",
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rtas_size);
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if (ret < 0) {
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fprintf(stderr, "Couldn't add rtas-size property: %s\n",
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fdt_strerror(ret));
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return ret;
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}
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for (i = 0; i < RTAS_TOKEN_MAX - RTAS_TOKEN_BASE; i++) {
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struct rtas_call *call = &rtas_table[i];
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if (!call->name) {
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continue;
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}
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ret = qemu_fdt_setprop_cell(fdt, "/rtas", call->name,
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i + RTAS_TOKEN_BASE);
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if (ret < 0) {
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fprintf(stderr, "Couldn't add rtas token for %s: %s\n",
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call->name, fdt_strerror(ret));
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return ret;
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}
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}
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return 0;
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}
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static void core_rtas_register_types(void)
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{
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spapr_rtas_register(RTAS_DISPLAY_CHARACTER, "display-character",
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rtas_display_character);
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spapr_rtas_register(RTAS_POWER_OFF, "power-off", rtas_power_off);
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spapr_rtas_register(RTAS_SYSTEM_REBOOT, "system-reboot",
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rtas_system_reboot);
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spapr_rtas_register(RTAS_QUERY_CPU_STOPPED_STATE, "query-cpu-stopped-state",
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rtas_query_cpu_stopped_state);
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spapr_rtas_register(RTAS_START_CPU, "start-cpu", rtas_start_cpu);
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spapr_rtas_register(RTAS_STOP_SELF, "stop-self", rtas_stop_self);
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spapr_rtas_register(RTAS_IBM_GET_SYSTEM_PARAMETER,
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"ibm,get-system-parameter",
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rtas_ibm_get_system_parameter);
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spapr_rtas_register(RTAS_IBM_SET_SYSTEM_PARAMETER,
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"ibm,set-system-parameter",
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rtas_ibm_set_system_parameter);
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spapr_rtas_register(RTAS_IBM_OS_TERM, "ibm,os-term",
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rtas_ibm_os_term);
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spapr_rtas_register(RTAS_SET_POWER_LEVEL, "set-power-level",
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rtas_set_power_level);
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spapr_rtas_register(RTAS_GET_POWER_LEVEL, "get-power-level",
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rtas_get_power_level);
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}
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type_init(core_rtas_register_types)
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