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 "sysemu/sysemu.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 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 } 165