Signed-off-by: Richard Henderson <richard.henderson@linaro.org> Message-Id: <20210315184615.1985590-16-richard.henderson@linaro.org> Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
636 lines
20 KiB
C
636 lines
20 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 "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 "sysemu/runstate.h"
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#include "kvm_ppc.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/spapr_cpu_core.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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#include "target/ppc/mmu-book3s-v3.h"
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#include "migration/blocker.h"
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#include "helper_regs.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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SpaprVioDevice *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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hreg_compute_hflags(env);
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/* Enable Power-saving mode Exit Cause exceptions for the new CPU */
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lpcr = env->spr[SPR_LPCR];
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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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if (env->mmu_model == POWERPC_MMU_3_00) {
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/*
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* New cpus are expected to start in the same radix/hash mode
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* as the existing CPUs
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*/
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if (ppc64_v3_radix(callcpu)) {
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lpcr |= LPCR_UPRT | LPCR_GTSE | LPCR_HR;
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} else {
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lpcr &= ~(LPCR_UPRT | LPCR_GTSE | LPCR_HR);
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}
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env->spr[SPR_PSSCR] &= ~PSSCR_EC;
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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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spapr_cpu_set_entry_state(newcpu, start, 0, r3, 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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* For the same reason, set PSSCR_EC.
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*/
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ppc_store_lpcr(cpu, env->spr[SPR_LPCR] & ~pcc->lpcr_pm);
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env->spr[SPR_PSSCR] |= PSSCR_EC;
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cs->halted = 1;
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kvmppc_set_reg_ppc_online(cpu, 0);
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qemu_cpu_kick(cs);
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}
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static void rtas_ibm_suspend_me(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;
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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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CPU_FOREACH(cs) {
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PowerPCCPU *c = POWERPC_CPU(cs);
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CPUPPCState *e = &c->env;
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if (c == cpu) {
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continue;
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}
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/* See h_join */
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if (!cs->halted || (e->msr & (1ULL << MSR_EE))) {
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rtas_st(rets, 0, H_MULTI_THREADS_ACTIVE);
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return;
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}
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}
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qemu_system_suspend_request();
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rtas_st(rets, 0, RTAS_OUT_SUCCESS);
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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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PowerPCCPUClass *pcc = POWERPC_CPU_GET_CLASS(cpu);
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MachineState *ms = MACHINE(spapr);
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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=%" PRIu64 ","
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"DesProcs=%d,"
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"MaxPlatProcs=%d",
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ms->smp.max_cpus,
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ms->ram_size / MiB,
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ms->smp.cpus,
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ms->smp.max_cpus);
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if (pcc->n_host_threads > 0) {
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char *hostthr_val, *old = param_val;
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/*
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* Add HostThrs property. This property is not present in PAPR but
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* is expected by some guests to communicate the number of physical
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* host threads per core on the system so that they can scale
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* information which varies based on the thread configuration.
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*/
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hostthr_val = g_strdup_printf(",HostThrs=%d", pcc->n_host_threads);
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param_val = g_strconcat(param_val, hostthr_val, NULL);
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g_free(hostthr_val);
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g_free(old);
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}
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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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target_ulong msgaddr = rtas_ld(args, 0);
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char msg[512];
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cpu_physical_memory_read(msgaddr, msg, sizeof(msg) - 1);
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msg[sizeof(msg) - 1] = 0;
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error_report("OS terminated: %s", msg);
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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 void rtas_ibm_nmi_register(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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hwaddr rtas_addr;
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target_ulong sreset_addr, mce_addr;
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if (spapr_get_cap(spapr, SPAPR_CAP_FWNMI) == SPAPR_CAP_OFF) {
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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_addr = spapr_get_rtas_addr();
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if (!rtas_addr) {
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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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sreset_addr = rtas_ld(args, 0);
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mce_addr = rtas_ld(args, 1);
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/* PAPR requires these are in the first 32M of memory and within RMA */
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if (sreset_addr >= 32 * MiB || sreset_addr >= spapr->rma_size ||
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mce_addr >= 32 * MiB || mce_addr >= spapr->rma_size) {
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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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if (kvm_enabled()) {
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if (kvmppc_set_fwnmi(cpu) < 0) {
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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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}
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spapr->fwnmi_system_reset_addr = sreset_addr;
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spapr->fwnmi_machine_check_addr = mce_addr;
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rtas_st(rets, 0, RTAS_OUT_SUCCESS);
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}
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static void rtas_ibm_nmi_interlock(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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if (spapr_get_cap(spapr, SPAPR_CAP_FWNMI) == SPAPR_CAP_OFF) {
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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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if (spapr->fwnmi_machine_check_addr == -1) {
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qemu_log_mask(LOG_GUEST_ERROR,
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"FWNMI: ibm,nmi-interlock RTAS called with FWNMI not registered.\n");
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/* NMI register not called */
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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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if (spapr->fwnmi_machine_check_interlock != cpu->vcpu_id) {
|
|
/*
|
|
* The vCPU that hit the NMI should invoke "ibm,nmi-interlock"
|
|
* This should be PARAM_ERROR, but Linux calls "ibm,nmi-interlock"
|
|
* for system reset interrupts, despite them not being interlocked.
|
|
* PowerVM silently ignores this and returns success here. Returning
|
|
* failure causes Linux to print the error "FWNMI: nmi-interlock
|
|
* failed: -3", although no other apparent ill effects, this is a
|
|
* regression for the user when enabling FWNMI. So for now, match
|
|
* PowerVM. When most Linux clients are fixed, this could be
|
|
* changed.
|
|
*/
|
|
rtas_st(rets, 0, RTAS_OUT_SUCCESS);
|
|
return;
|
|
}
|
|
|
|
/*
|
|
* vCPU issuing "ibm,nmi-interlock" is done with NMI handling,
|
|
* hence unset fwnmi_machine_check_interlock.
|
|
*/
|
|
spapr->fwnmi_machine_check_interlock = -1;
|
|
qemu_cond_signal(&spapr->fwnmi_machine_check_interlock_cond);
|
|
rtas_st(rets, 0, RTAS_OUT_SUCCESS);
|
|
migrate_del_blocker(spapr->fwnmi_migration_blocker);
|
|
}
|
|
|
|
static struct rtas_call {
|
|
const char *name;
|
|
spapr_rtas_fn fn;
|
|
} rtas_table[RTAS_TOKEN_MAX - RTAS_TOKEN_BASE];
|
|
|
|
target_ulong spapr_rtas_call(PowerPCCPU *cpu, SpaprMachineState *spapr,
|
|
uint32_t token, uint32_t nargs, target_ulong args,
|
|
uint32_t nret, target_ulong rets)
|
|
{
|
|
if ((token >= RTAS_TOKEN_BASE) && (token < RTAS_TOKEN_MAX)) {
|
|
struct rtas_call *call = rtas_table + (token - RTAS_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;
|
|
}
|
|
|
|
uint64_t qtest_rtas_call(char *cmd, uint32_t nargs, uint64_t args,
|
|
uint32_t nret, uint64_t rets)
|
|
{
|
|
int token;
|
|
|
|
for (token = 0; token < RTAS_TOKEN_MAX - RTAS_TOKEN_BASE; token++) {
|
|
if (strcmp(cmd, rtas_table[token].name) == 0) {
|
|
SpaprMachineState *spapr = SPAPR_MACHINE(qdev_get_machine());
|
|
PowerPCCPU *cpu = POWERPC_CPU(first_cpu);
|
|
|
|
rtas_table[token].fn(cpu, spapr, token + RTAS_TOKEN_BASE,
|
|
nargs, args, nret, rets);
|
|
return H_SUCCESS;
|
|
}
|
|
}
|
|
return H_PARAMETER;
|
|
}
|
|
|
|
void spapr_rtas_register(int token, const char *name, spapr_rtas_fn fn)
|
|
{
|
|
assert((token >= RTAS_TOKEN_BASE) && (token < RTAS_TOKEN_MAX));
|
|
|
|
token -= RTAS_TOKEN_BASE;
|
|
|
|
assert(!name || !rtas_table[token].name);
|
|
|
|
rtas_table[token].name = name;
|
|
rtas_table[token].fn = fn;
|
|
}
|
|
|
|
void spapr_dt_rtas_tokens(void *fdt, int rtas)
|
|
{
|
|
int i;
|
|
|
|
for (i = 0; i < RTAS_TOKEN_MAX - RTAS_TOKEN_BASE; i++) {
|
|
struct rtas_call *call = &rtas_table[i];
|
|
|
|
if (!call->name) {
|
|
continue;
|
|
}
|
|
|
|
_FDT(fdt_setprop_cell(fdt, rtas, call->name, i + RTAS_TOKEN_BASE));
|
|
}
|
|
}
|
|
|
|
hwaddr spapr_get_rtas_addr(void)
|
|
{
|
|
SpaprMachineState *spapr = SPAPR_MACHINE(qdev_get_machine());
|
|
int rtas_node;
|
|
const fdt32_t *rtas_data;
|
|
void *fdt = spapr->fdt_blob;
|
|
|
|
/* fetch rtas addr from fdt */
|
|
rtas_node = fdt_path_offset(fdt, "/rtas");
|
|
if (rtas_node < 0) {
|
|
return 0;
|
|
}
|
|
|
|
rtas_data = fdt_getprop(fdt, rtas_node, "linux,rtas-base", NULL);
|
|
if (!rtas_data) {
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* We assume that the OS called RTAS instantiate-rtas, but some other
|
|
* OS might call RTAS instantiate-rtas-64 instead. This fine as of now
|
|
* as SLOF only supports 32-bit variant.
|
|
*/
|
|
return (hwaddr)fdt32_to_cpu(*rtas_data);
|
|
}
|
|
|
|
static void core_rtas_register_types(void)
|
|
{
|
|
spapr_rtas_register(RTAS_DISPLAY_CHARACTER, "display-character",
|
|
rtas_display_character);
|
|
spapr_rtas_register(RTAS_POWER_OFF, "power-off", rtas_power_off);
|
|
spapr_rtas_register(RTAS_SYSTEM_REBOOT, "system-reboot",
|
|
rtas_system_reboot);
|
|
spapr_rtas_register(RTAS_QUERY_CPU_STOPPED_STATE, "query-cpu-stopped-state",
|
|
rtas_query_cpu_stopped_state);
|
|
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_SUSPEND_ME, "ibm,suspend-me",
|
|
rtas_ibm_suspend_me);
|
|
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);
|
|
spapr_rtas_register(RTAS_IBM_NMI_REGISTER, "ibm,nmi-register",
|
|
rtas_ibm_nmi_register);
|
|
spapr_rtas_register(RTAS_IBM_NMI_INTERLOCK, "ibm,nmi-interlock",
|
|
rtas_ibm_nmi_interlock);
|
|
}
|
|
|
|
type_init(core_rtas_register_types)
|