| 1 | /* |
| 2 | * SPAPR machine hooks to Virtual Open Firmware, |
| 3 | * |
| 4 | * SPDX-License-Identifier: GPL-2.0-or-later |
| 5 | */ |
| 6 | #include "qemu/osdep.h" |
| 7 | #include "qapi/error.h" |
| 8 | #include "hw/ppc/spapr.h" |
| 9 | #include "hw/ppc/spapr_vio.h" |
| 10 | #include "hw/ppc/spapr_cpu_core.h" |
| 11 | #include "hw/ppc/fdt.h" |
| 12 | #include "hw/ppc/vof.h" |
| 13 | #include "system/system.h" |
| 14 | #include "qom/qom-qobject.h" |
| 15 | #include "trace.h" |
| 16 | |
| 17 | target_ulong spapr_h_vof_client(PowerPCCPU *cpu, SpaprMachineState *spapr, |
| 18 | target_ulong opcode, target_ulong *_args) |
| 19 | { |
| 20 | int ret = vof_client_call(MACHINE(spapr), spapr->vof, spapr->fdt_blob, |
| 21 | ppc64_phys_to_real(_args[0])); |
| 22 | |
| 23 | if (ret) { |
| 24 | return H_PARAMETER; |
| 25 | } |
| 26 | return H_SUCCESS; |
| 27 | } |
| 28 | |
| 29 | void spapr_vof_client_dt_finalize(SpaprMachineState *spapr, void *fdt) |
| 30 | { |
| 31 | g_autofree char *stdout_path = spapr_vio_stdout_path(spapr->vio_bus); |
| 32 | |
| 33 | vof_build_dt(fdt, spapr->vof); |
| 34 | |
| 35 | if (spapr->vof->bootargs) { |
| 36 | int chosen; |
| 37 | |
| 38 | _FDT(chosen = fdt_path_offset(fdt, "/chosen")); |
| 39 | /* |
| 40 | * If the client did not change "bootargs", spapr_dt_chosen() must have |
| 41 | * stored machine->kernel_cmdline in it before getting here. |
| 42 | */ |
| 43 | _FDT(fdt_setprop_string(fdt, chosen, "bootargs", spapr->vof->bootargs)); |
| 44 | } |
| 45 | |
| 46 | /* |
| 47 | * SLOF-less setup requires an open instance of stdout for early |
| 48 | * kernel printk. By now all phandles are settled so we can open |
| 49 | * the default serial console. |
| 50 | */ |
| 51 | if (stdout_path) { |
| 52 | _FDT(vof_client_open_store(fdt, spapr->vof, "/chosen", "stdout", |
| 53 | stdout_path)); |
| 54 | } |
| 55 | } |
| 56 | |
| 57 | void spapr_vof_reset(SpaprMachineState *spapr, void *fdt, Error **errp) |
| 58 | { |
| 59 | target_ulong stack_ptr; |
| 60 | Vof *vof = spapr->vof; |
| 61 | PowerPCCPU *first_ppc_cpu = POWERPC_CPU(first_cpu); |
| 62 | |
| 63 | vof_init(vof, spapr->rma_size, errp); |
| 64 | |
| 65 | stack_ptr = vof_claim(vof, 0, VOF_STACK_SIZE, VOF_STACK_SIZE); |
| 66 | if (stack_ptr == -1) { |
| 67 | error_setg(errp, "Memory allocation for stack failed"); |
| 68 | return; |
| 69 | } |
| 70 | /* Stack grows downwards plus reserve space for the minimum stack frame */ |
| 71 | stack_ptr += VOF_STACK_SIZE - 0x20; |
| 72 | |
| 73 | if (spapr->kernel_size && |
| 74 | vof_claim(vof, spapr->kernel_addr, spapr->kernel_size, 0) == -1) { |
| 75 | error_setg(errp, "Memory for kernel is in use"); |
| 76 | return; |
| 77 | } |
| 78 | |
| 79 | if (spapr->initrd_size && |
| 80 | vof_claim(vof, spapr->initrd_base, spapr->initrd_size, 0) == -1) { |
| 81 | error_setg(errp, "Memory for initramdisk is in use"); |
| 82 | return; |
| 83 | } |
| 84 | |
| 85 | spapr_vof_client_dt_finalize(spapr, fdt); |
| 86 | |
| 87 | spapr_cpu_set_entry_state(first_ppc_cpu, SPAPR_ENTRY_POINT, |
| 88 | stack_ptr, spapr->initrd_base, |
| 89 | spapr->initrd_size); |
| 90 | |
| 91 | /* |
| 92 | * At this point the expected allocation map is: |
| 93 | * |
| 94 | * 0..c38 - the initial firmware |
| 95 | * 8000..10000 - stack |
| 96 | * 400000.. - kernel |
| 97 | * 3ea0000.. - initramdisk |
| 98 | * |
| 99 | * We skip writing FDT as nothing expects it; OF client interface is |
| 100 | * going to be used for reading the device tree. |
| 101 | */ |
| 102 | } |
| 103 | |
| 104 | void spapr_vof_quiesce(MachineState *ms) |
| 105 | { |
| 106 | SpaprMachineState *spapr = SPAPR_MACHINE(ms); |
| 107 | |
| 108 | spapr->fdt_size = fdt_totalsize(spapr->fdt_blob); |
| 109 | spapr->fdt_initial_size = spapr->fdt_size; |
| 110 | } |
| 111 | |
| 112 | bool spapr_vof_setprop(MachineState *ms, const char *path, const char *propname, |
| 113 | void *val, int vallen) |
| 114 | { |
| 115 | SpaprMachineState *spapr = SPAPR_MACHINE(ms); |
| 116 | |
| 117 | /* |
| 118 | * We only allow changing properties which we know how to update in QEMU |
| 119 | * OR |
| 120 | * the ones which we know that they need to survive during "quiesce". |
| 121 | */ |
| 122 | |
| 123 | if (strcmp(path, "/rtas") == 0) { |
| 124 | if (strcmp(propname, "linux,rtas-base") == 0 || |
| 125 | strcmp(propname, "linux,rtas-entry") == 0) { |
| 126 | /* These need to survive quiesce so let them store in the FDT */ |
| 127 | return true; |
| 128 | } |
| 129 | } |
| 130 | |
| 131 | if (strcmp(path, "/chosen") == 0) { |
| 132 | if (strcmp(propname, "bootargs") == 0) { |
| 133 | Vof *vof = spapr->vof; |
| 134 | |
| 135 | g_free(vof->bootargs); |
| 136 | vof->bootargs = g_strndup(val, vallen); |
| 137 | return true; |
| 138 | } |
| 139 | if (strcmp(propname, "linux,initrd-start") == 0) { |
| 140 | if (vallen == sizeof(uint32_t)) { |
| 141 | spapr->initrd_base = ldl_be_p(val); |
| 142 | return true; |
| 143 | } |
| 144 | if (vallen == sizeof(uint64_t)) { |
| 145 | spapr->initrd_base = ldq_be_p(val); |
| 146 | return true; |
| 147 | } |
| 148 | return false; |
| 149 | } |
| 150 | if (strcmp(propname, "linux,initrd-end") == 0) { |
| 151 | if (vallen == sizeof(uint32_t)) { |
| 152 | spapr->initrd_size = ldl_be_p(val) - spapr->initrd_base; |
| 153 | return true; |
| 154 | } |
| 155 | if (vallen == sizeof(uint64_t)) { |
| 156 | spapr->initrd_size = ldq_be_p(val) - spapr->initrd_base; |
| 157 | return true; |
| 158 | } |
| 159 | return false; |
| 160 | } |
| 161 | } |
| 162 | |
| 163 | return true; |
| 164 | } |