1fc8c745dSAlexey Kardashevskiy /* 2fc8c745dSAlexey Kardashevskiy * SPAPR machine hooks to Virtual Open Firmware, 3fc8c745dSAlexey Kardashevskiy * 4fc8c745dSAlexey Kardashevskiy * SPDX-License-Identifier: GPL-2.0-or-later 5fc8c745dSAlexey Kardashevskiy */ 6fc8c745dSAlexey Kardashevskiy #include "qemu/osdep.h" 7fc8c745dSAlexey Kardashevskiy #include "qemu-common.h" 8fc8c745dSAlexey Kardashevskiy #include "qapi/error.h" 9fc8c745dSAlexey Kardashevskiy #include "hw/ppc/spapr.h" 10fc8c745dSAlexey Kardashevskiy #include "hw/ppc/spapr_vio.h" 11*21bde1ecSAlexey Kardashevskiy #include "hw/ppc/spapr_cpu_core.h" 12fc8c745dSAlexey Kardashevskiy #include "hw/ppc/fdt.h" 13fc8c745dSAlexey Kardashevskiy #include "hw/ppc/vof.h" 14fc8c745dSAlexey Kardashevskiy #include "sysemu/sysemu.h" 15fc8c745dSAlexey Kardashevskiy #include "qom/qom-qobject.h" 16fc8c745dSAlexey Kardashevskiy #include "trace.h" 17fc8c745dSAlexey Kardashevskiy 18fc8c745dSAlexey Kardashevskiy target_ulong spapr_h_vof_client(PowerPCCPU *cpu, SpaprMachineState *spapr, 19fc8c745dSAlexey Kardashevskiy target_ulong opcode, target_ulong *_args) 20fc8c745dSAlexey Kardashevskiy { 21fc8c745dSAlexey Kardashevskiy int ret = vof_client_call(MACHINE(spapr), spapr->vof, spapr->fdt_blob, 22fc8c745dSAlexey Kardashevskiy ppc64_phys_to_real(_args[0])); 23fc8c745dSAlexey Kardashevskiy 24fc8c745dSAlexey Kardashevskiy if (ret) { 25fc8c745dSAlexey Kardashevskiy return H_PARAMETER; 26fc8c745dSAlexey Kardashevskiy } 27fc8c745dSAlexey Kardashevskiy return H_SUCCESS; 28fc8c745dSAlexey Kardashevskiy } 29fc8c745dSAlexey Kardashevskiy 30fc8c745dSAlexey Kardashevskiy void spapr_vof_client_dt_finalize(SpaprMachineState *spapr, void *fdt) 31fc8c745dSAlexey Kardashevskiy { 32fc8c745dSAlexey Kardashevskiy char *stdout_path = spapr_vio_stdout_path(spapr->vio_bus); 33fc8c745dSAlexey Kardashevskiy 34fc8c745dSAlexey Kardashevskiy vof_build_dt(fdt, spapr->vof); 35fc8c745dSAlexey Kardashevskiy 36*21bde1ecSAlexey Kardashevskiy if (spapr->vof->bootargs) { 37*21bde1ecSAlexey Kardashevskiy int chosen; 38*21bde1ecSAlexey Kardashevskiy 39fc8c745dSAlexey Kardashevskiy _FDT(chosen = fdt_path_offset(fdt, "/chosen")); 40*21bde1ecSAlexey Kardashevskiy /* 41*21bde1ecSAlexey Kardashevskiy * If the client did not change "bootargs", spapr_dt_chosen() must have 42*21bde1ecSAlexey Kardashevskiy * stored machine->kernel_cmdline in it before getting here. 43*21bde1ecSAlexey Kardashevskiy */ 44*21bde1ecSAlexey Kardashevskiy _FDT(fdt_setprop_string(fdt, chosen, "bootargs", spapr->vof->bootargs)); 45*21bde1ecSAlexey Kardashevskiy } 46fc8c745dSAlexey Kardashevskiy 47fc8c745dSAlexey Kardashevskiy /* 48fc8c745dSAlexey Kardashevskiy * SLOF-less setup requires an open instance of stdout for early 49fc8c745dSAlexey Kardashevskiy * kernel printk. By now all phandles are settled so we can open 50fc8c745dSAlexey Kardashevskiy * the default serial console. 51fc8c745dSAlexey Kardashevskiy */ 52fc8c745dSAlexey Kardashevskiy if (stdout_path) { 53fc8c745dSAlexey Kardashevskiy _FDT(vof_client_open_store(fdt, spapr->vof, "/chosen", "stdout", 54fc8c745dSAlexey Kardashevskiy stdout_path)); 55fc8c745dSAlexey Kardashevskiy } 56fc8c745dSAlexey Kardashevskiy } 57fc8c745dSAlexey Kardashevskiy 58*21bde1ecSAlexey Kardashevskiy void spapr_vof_reset(SpaprMachineState *spapr, void *fdt, Error **errp) 59fc8c745dSAlexey Kardashevskiy { 60*21bde1ecSAlexey Kardashevskiy target_ulong stack_ptr; 61fc8c745dSAlexey Kardashevskiy Vof *vof = spapr->vof; 62*21bde1ecSAlexey Kardashevskiy PowerPCCPU *first_ppc_cpu = POWERPC_CPU(first_cpu); 63fc8c745dSAlexey Kardashevskiy 64fc8c745dSAlexey Kardashevskiy vof_init(vof, spapr->rma_size, errp); 65fc8c745dSAlexey Kardashevskiy 66*21bde1ecSAlexey Kardashevskiy stack_ptr = vof_claim(vof, 0, VOF_STACK_SIZE, VOF_STACK_SIZE); 67*21bde1ecSAlexey Kardashevskiy if (stack_ptr == -1) { 68fc8c745dSAlexey Kardashevskiy error_setg(errp, "Memory allocation for stack failed"); 69fc8c745dSAlexey Kardashevskiy return; 70fc8c745dSAlexey Kardashevskiy } 71fc8c745dSAlexey Kardashevskiy /* Stack grows downwards plus reserve space for the minimum stack frame */ 72*21bde1ecSAlexey Kardashevskiy stack_ptr += VOF_STACK_SIZE - 0x20; 73fc8c745dSAlexey Kardashevskiy 74fc8c745dSAlexey Kardashevskiy if (spapr->kernel_size && 75fc8c745dSAlexey Kardashevskiy vof_claim(vof, spapr->kernel_addr, spapr->kernel_size, 0) == -1) { 76fc8c745dSAlexey Kardashevskiy error_setg(errp, "Memory for kernel is in use"); 77fc8c745dSAlexey Kardashevskiy return; 78fc8c745dSAlexey Kardashevskiy } 79fc8c745dSAlexey Kardashevskiy 80fc8c745dSAlexey Kardashevskiy if (spapr->initrd_size && 81fc8c745dSAlexey Kardashevskiy vof_claim(vof, spapr->initrd_base, spapr->initrd_size, 0) == -1) { 82fc8c745dSAlexey Kardashevskiy error_setg(errp, "Memory for initramdisk is in use"); 83fc8c745dSAlexey Kardashevskiy return; 84fc8c745dSAlexey Kardashevskiy } 85fc8c745dSAlexey Kardashevskiy 86fc8c745dSAlexey Kardashevskiy spapr_vof_client_dt_finalize(spapr, fdt); 87fc8c745dSAlexey Kardashevskiy 88*21bde1ecSAlexey Kardashevskiy spapr_cpu_set_entry_state(first_ppc_cpu, SPAPR_ENTRY_POINT, 89*21bde1ecSAlexey Kardashevskiy stack_ptr, spapr->initrd_base, 90*21bde1ecSAlexey Kardashevskiy spapr->initrd_size); 91*21bde1ecSAlexey Kardashevskiy /* VOF is 32bit BE so enforce MSR here */ 92*21bde1ecSAlexey Kardashevskiy first_ppc_cpu->env.msr &= ~((1ULL << MSR_SF) | (1ULL << MSR_LE)); 93*21bde1ecSAlexey Kardashevskiy 94fc8c745dSAlexey Kardashevskiy /* 95fc8c745dSAlexey Kardashevskiy * At this point the expected allocation map is: 96fc8c745dSAlexey Kardashevskiy * 97fc8c745dSAlexey Kardashevskiy * 0..c38 - the initial firmware 98fc8c745dSAlexey Kardashevskiy * 8000..10000 - stack 99fc8c745dSAlexey Kardashevskiy * 400000.. - kernel 100fc8c745dSAlexey Kardashevskiy * 3ea0000.. - initramdisk 101fc8c745dSAlexey Kardashevskiy * 102fc8c745dSAlexey Kardashevskiy * We skip writing FDT as nothing expects it; OF client interface is 103fc8c745dSAlexey Kardashevskiy * going to be used for reading the device tree. 104fc8c745dSAlexey Kardashevskiy */ 105fc8c745dSAlexey Kardashevskiy } 106fc8c745dSAlexey Kardashevskiy 107fc8c745dSAlexey Kardashevskiy void spapr_vof_quiesce(MachineState *ms) 108fc8c745dSAlexey Kardashevskiy { 109fc8c745dSAlexey Kardashevskiy SpaprMachineState *spapr = SPAPR_MACHINE(ms); 110fc8c745dSAlexey Kardashevskiy 111fc8c745dSAlexey Kardashevskiy spapr->fdt_size = fdt_totalsize(spapr->fdt_blob); 112fc8c745dSAlexey Kardashevskiy spapr->fdt_initial_size = spapr->fdt_size; 113fc8c745dSAlexey Kardashevskiy } 114fc8c745dSAlexey Kardashevskiy 115fc8c745dSAlexey Kardashevskiy bool spapr_vof_setprop(MachineState *ms, const char *path, const char *propname, 116fc8c745dSAlexey Kardashevskiy void *val, int vallen) 117fc8c745dSAlexey Kardashevskiy { 118fc8c745dSAlexey Kardashevskiy SpaprMachineState *spapr = SPAPR_MACHINE(ms); 119fc8c745dSAlexey Kardashevskiy 120fc8c745dSAlexey Kardashevskiy /* 121fc8c745dSAlexey Kardashevskiy * We only allow changing properties which we know how to update in QEMU 122fc8c745dSAlexey Kardashevskiy * OR 123fc8c745dSAlexey Kardashevskiy * the ones which we know that they need to survive during "quiesce". 124fc8c745dSAlexey Kardashevskiy */ 125fc8c745dSAlexey Kardashevskiy 126fc8c745dSAlexey Kardashevskiy if (strcmp(path, "/rtas") == 0) { 127fc8c745dSAlexey Kardashevskiy if (strcmp(propname, "linux,rtas-base") == 0 || 128fc8c745dSAlexey Kardashevskiy strcmp(propname, "linux,rtas-entry") == 0) { 129fc8c745dSAlexey Kardashevskiy /* These need to survive quiesce so let them store in the FDT */ 130fc8c745dSAlexey Kardashevskiy return true; 131fc8c745dSAlexey Kardashevskiy } 132fc8c745dSAlexey Kardashevskiy } 133fc8c745dSAlexey Kardashevskiy 134fc8c745dSAlexey Kardashevskiy if (strcmp(path, "/chosen") == 0) { 135fc8c745dSAlexey Kardashevskiy if (strcmp(propname, "bootargs") == 0) { 136fc8c745dSAlexey Kardashevskiy Vof *vof = spapr->vof; 137fc8c745dSAlexey Kardashevskiy 138fc8c745dSAlexey Kardashevskiy g_free(vof->bootargs); 139fc8c745dSAlexey Kardashevskiy vof->bootargs = g_strndup(val, vallen); 140fc8c745dSAlexey Kardashevskiy return true; 141fc8c745dSAlexey Kardashevskiy } 142fc8c745dSAlexey Kardashevskiy if (strcmp(propname, "linux,initrd-start") == 0) { 143fc8c745dSAlexey Kardashevskiy if (vallen == sizeof(uint32_t)) { 144fc8c745dSAlexey Kardashevskiy spapr->initrd_base = ldl_be_p(val); 145fc8c745dSAlexey Kardashevskiy return true; 146fc8c745dSAlexey Kardashevskiy } 147fc8c745dSAlexey Kardashevskiy if (vallen == sizeof(uint64_t)) { 148fc8c745dSAlexey Kardashevskiy spapr->initrd_base = ldq_be_p(val); 149fc8c745dSAlexey Kardashevskiy return true; 150fc8c745dSAlexey Kardashevskiy } 151fc8c745dSAlexey Kardashevskiy return false; 152fc8c745dSAlexey Kardashevskiy } 153fc8c745dSAlexey Kardashevskiy if (strcmp(propname, "linux,initrd-end") == 0) { 154fc8c745dSAlexey Kardashevskiy if (vallen == sizeof(uint32_t)) { 155fc8c745dSAlexey Kardashevskiy spapr->initrd_size = ldl_be_p(val) - spapr->initrd_base; 156fc8c745dSAlexey Kardashevskiy return true; 157fc8c745dSAlexey Kardashevskiy } 158fc8c745dSAlexey Kardashevskiy if (vallen == sizeof(uint64_t)) { 159fc8c745dSAlexey Kardashevskiy spapr->initrd_size = ldq_be_p(val) - spapr->initrd_base; 160fc8c745dSAlexey Kardashevskiy return true; 161fc8c745dSAlexey Kardashevskiy } 162fc8c745dSAlexey Kardashevskiy return false; 163fc8c745dSAlexey Kardashevskiy } 164fc8c745dSAlexey Kardashevskiy } 165fc8c745dSAlexey Kardashevskiy 166fc8c745dSAlexey Kardashevskiy return true; 167fc8c745dSAlexey Kardashevskiy } 168