rtas_start_cpu() calls spapr_cpu_update_tb_offset() and spapr_cpu_set_endianness() to initialize certain things in the new cpu's state. This is the only caller of those helpers, and they're each only a few lines long, so we might as well just fold them into the caller. In addition, those helpers initialize state on the new cpu to match that of the first cpu. That will generally work, but might be at least logically incorrect if the first cpu has been set offline by the guest. So, instead base the state on that of the cpu invoking the RTAS call, which is obviously active already. Signed-off-by: David Gibson <david@gibson.dropbear.id.au> Reviewed-by: Cédric Le Goater <clg@kaod.org> Tested-by: Cédric Le Goater <clg@kaod.org> Reviewed-by: Greg Kurz <groug@kaod.org>
483 lines
15 KiB
C
483 lines
15 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 "qemu/osdep.h"
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#include "cpu.h"
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#include "qemu/log.h"
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#include "qemu/error-report.h"
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#include "sysemu/sysemu.h"
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#include "hw/qdev.h"
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#include "sysemu/device_tree.h"
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#include "sysemu/cpus.h"
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#include "sysemu/hw_accel.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 "hw/ppc/spapr_rtas.h"
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#include "hw/ppc/ppc.h"
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#include "hw/boards.h"
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#include <libfdt.h>
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#include "hw/ppc/spapr_drc.h"
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#include "qemu/cutils.h"
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#include "trace.h"
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#include "hw/ppc/fdt.h"
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#include "target/ppc/mmu-hash64.h"
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static void rtas_display_character(PowerPCCPU *cpu, sPAPRMachineState *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, sPAPRMachineState *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(SHUTDOWN_CAUSE_GUEST_SHUTDOWN);
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cpu_stop_current();
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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, sPAPRMachineState *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(SHUTDOWN_CAUSE_GUEST_RESET);
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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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sPAPRMachineState *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 = spapr_find_cpu(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 *callcpu, sPAPRMachineState *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 *newcpu;
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CPUPPCState *env;
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PowerPCCPUClass *pcc;
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target_ulong lpcr;
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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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newcpu = spapr_find_cpu(id);
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if (!newcpu) {
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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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return;
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}
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env = &newcpu->env;
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pcc = POWERPC_CPU_GET_CLASS(newcpu);
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if (!CPU(newcpu)->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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cpu_synchronize_state(CPU(newcpu));
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env->msr = (1ULL << MSR_SF) | (1ULL << MSR_ME);
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/* Enable Power-saving mode Exit Cause exceptions for the new CPU */
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lpcr = env->spr[SPR_LPCR] | pcc->lpcr_pm;
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if (!pcc->interrupts_big_endian(callcpu)) {
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lpcr |= LPCR_ILE;
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}
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ppc_store_lpcr(newcpu, lpcr);
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/*
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* Set the timebase offset of the new CPU to that of the invoking
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* CPU. This helps hotplugged CPU to have the correct timebase
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* offset.
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*/
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newcpu->env.tb_env->tb_offset = callcpu->env.tb_env->tb_offset;
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env->nip = start;
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env->gpr[3] = r3;
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CPU(newcpu)->halted = 0;
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qemu_cpu_kick(CPU(newcpu));
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rtas_st(rets, 0, RTAS_OUT_SUCCESS);
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}
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static void rtas_stop_self(PowerPCCPU *cpu, sPAPRMachineState *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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PowerPCCPUClass *pcc = POWERPC_CPU_GET_CLASS(cpu);
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/* Disable Power-saving mode Exit Cause exceptions for the CPU.
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* This could deliver an interrupt on a dying CPU and crash the
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* guest */
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ppc_store_lpcr(cpu, env->spr[SPR_LPCR] & ~pcc->lpcr_pm);
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cs->halted = 1;
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qemu_cpu_kick(cs);
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}
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static inline int sysparm_st(target_ulong addr, target_ulong len,
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const void *val, uint16_t vallen)
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{
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hwaddr phys = ppc64_phys_to_real(addr);
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if (len < 2) {
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return RTAS_OUT_SYSPARM_PARAM_ERROR;
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}
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stw_be_phys(&address_space_memory, phys, vallen);
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cpu_physical_memory_write(phys + 2, val, MIN(len - 2, vallen));
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return RTAS_OUT_SUCCESS;
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}
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static void rtas_ibm_get_system_parameter(PowerPCCPU *cpu,
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sPAPRMachineState *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;
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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,"
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"DesMem=%llu,"
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"DesProcs=%d,"
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"MaxPlatProcs=%d",
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max_cpus,
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current_machine->ram_size / M_BYTE,
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smp_cpus,
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max_cpus);
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ret = sysparm_st(buffer, length, param_val, strlen(param_val) + 1);
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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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ret = sysparm_st(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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ret = sysparm_st(buffer, length, (unsigned char *)&qemu_uuid,
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(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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sPAPRMachineState *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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sPAPRMachineState *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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qemu_system_guest_panicked(NULL);
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rtas_st(rets, 0, RTAS_OUT_SUCCESS);
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}
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static void rtas_set_power_level(PowerPCCPU *cpu, sPAPRMachineState *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, sPAPRMachineState *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, sPAPRMachineState *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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uint64_t qtest_rtas_call(char *cmd, uint32_t nargs, uint64_t args,
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uint32_t nret, uint64_t rets)
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{
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int token;
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for (token = 0; token < RTAS_TOKEN_MAX - RTAS_TOKEN_BASE; token++) {
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if (strcmp(cmd, rtas_table[token].name) == 0) {
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sPAPRMachineState *spapr = SPAPR_MACHINE(qdev_get_machine());
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PowerPCCPU *cpu = POWERPC_CPU(first_cpu);
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rtas_table[token].fn(cpu, spapr, token + RTAS_TOKEN_BASE,
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nargs, args, nret, rets);
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return H_SUCCESS;
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}
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}
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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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assert((token >= RTAS_TOKEN_BASE) && (token < RTAS_TOKEN_MAX));
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token -= RTAS_TOKEN_BASE;
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assert(!rtas_table[token].name);
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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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void spapr_dt_rtas_tokens(void *fdt, int rtas)
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{
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int i;
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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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_FDT(fdt_setprop_cell(fdt, rtas, call->name, i + RTAS_TOKEN_BASE));
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}
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}
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void spapr_load_rtas(sPAPRMachineState *spapr, void *fdt, hwaddr addr)
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{
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int rtas_node;
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int ret;
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/* Copy RTAS blob into guest RAM */
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cpu_physical_memory_write(addr, spapr->rtas_blob, spapr->rtas_size);
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ret = fdt_add_mem_rsv(fdt, addr, spapr->rtas_size);
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if (ret < 0) {
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error_report("Couldn't add RTAS reserve entry: %s",
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fdt_strerror(ret));
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exit(1);
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}
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/* Update the device tree with the blob's location */
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rtas_node = fdt_path_offset(fdt, "/rtas");
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assert(rtas_node >= 0);
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ret = fdt_setprop_cell(fdt, rtas_node, "linux,rtas-base", addr);
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if (ret < 0) {
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error_report("Couldn't add linux,rtas-base property: %s",
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fdt_strerror(ret));
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exit(1);
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}
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ret = fdt_setprop_cell(fdt, rtas_node, "linux,rtas-entry", addr);
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if (ret < 0) {
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error_report("Couldn't add linux,rtas-entry property: %s",
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fdt_strerror(ret));
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exit(1);
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}
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ret = fdt_setprop_cell(fdt, rtas_node, "rtas-size", spapr->rtas_size);
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if (ret < 0) {
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error_report("Couldn't add rtas-size property: %s",
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fdt_strerror(ret));
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exit(1);
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}
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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);
|
|
spapr_rtas_register(RTAS_STOP_SELF, "stop-self", rtas_stop_self);
|
|
spapr_rtas_register(RTAS_IBM_GET_SYSTEM_PARAMETER,
|
|
"ibm,get-system-parameter",
|
|
rtas_ibm_get_system_parameter);
|
|
spapr_rtas_register(RTAS_IBM_SET_SYSTEM_PARAMETER,
|
|
"ibm,set-system-parameter",
|
|
rtas_ibm_set_system_parameter);
|
|
spapr_rtas_register(RTAS_IBM_OS_TERM, "ibm,os-term",
|
|
rtas_ibm_os_term);
|
|
spapr_rtas_register(RTAS_SET_POWER_LEVEL, "set-power-level",
|
|
rtas_set_power_level);
|
|
spapr_rtas_register(RTAS_GET_POWER_LEVEL, "get-power-level",
|
|
rtas_get_power_level);
|
|
}
|
|
|
|
type_init(core_rtas_register_types)
|