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Diffstat (limited to 'arch/powerpc/platforms/pseries/firmware.c')
| -rw-r--r-- | arch/powerpc/platforms/pseries/firmware.c | 188 |
1 files changed, 188 insertions, 0 deletions
diff --git a/arch/powerpc/platforms/pseries/firmware.c b/arch/powerpc/platforms/pseries/firmware.c new file mode 100644 index 000000000..f162156b7 --- /dev/null +++ b/arch/powerpc/platforms/pseries/firmware.c @@ -0,0 +1,188 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* + * pSeries firmware setup code. + * + * Portions from arch/powerpc/platforms/pseries/setup.c: + * Copyright (C) 1995 Linus Torvalds + * Adapted from 'alpha' version by Gary Thomas + * Modified by Cort Dougan (cort@cs.nmt.edu) + * Modified by PPC64 Team, IBM Corp + * + * Portions from arch/powerpc/kernel/firmware.c + * Copyright (C) 2001 Ben. Herrenschmidt (benh@kernel.crashing.org) + * Modifications for ppc64: + * Copyright (C) 2003 Dave Engebretsen <engebret@us.ibm.com> + * Copyright (C) 2005 Stephen Rothwell, IBM Corporation + * + * Copyright 2006 IBM Corporation. + */ + + +#include <linux/of_fdt.h> +#include <asm/firmware.h> +#include <asm/prom.h> +#include <asm/udbg.h> +#include <asm/svm.h> + +#include "pseries.h" + +struct hypertas_fw_feature { + unsigned long val; + char * name; +}; + +/* + * The names in this table match names in rtas/ibm,hypertas-functions. If the + * entry ends in a '*', only upto the '*' is matched. Otherwise the entire + * string must match. + */ +static __initdata struct hypertas_fw_feature +hypertas_fw_features_table[] = { + {FW_FEATURE_PFT, "hcall-pft"}, + {FW_FEATURE_TCE, "hcall-tce"}, + {FW_FEATURE_SPRG0, "hcall-sprg0"}, + {FW_FEATURE_DABR, "hcall-dabr"}, + {FW_FEATURE_COPY, "hcall-copy"}, + {FW_FEATURE_ASR, "hcall-asr"}, + {FW_FEATURE_DEBUG, "hcall-debug"}, + {FW_FEATURE_PERF, "hcall-perf"}, + {FW_FEATURE_DUMP, "hcall-dump"}, + {FW_FEATURE_INTERRUPT, "hcall-interrupt"}, + {FW_FEATURE_MIGRATE, "hcall-migrate"}, + {FW_FEATURE_PERFMON, "hcall-perfmon"}, + {FW_FEATURE_CRQ, "hcall-crq"}, + {FW_FEATURE_VIO, "hcall-vio"}, + {FW_FEATURE_RDMA, "hcall-rdma"}, + {FW_FEATURE_LLAN, "hcall-lLAN"}, + {FW_FEATURE_BULK_REMOVE, "hcall-bulk"}, + {FW_FEATURE_XDABR, "hcall-xdabr"}, + {FW_FEATURE_PUT_TCE_IND | FW_FEATURE_STUFF_TCE, + "hcall-multi-tce"}, + {FW_FEATURE_SPLPAR, "hcall-splpar"}, + {FW_FEATURE_VPHN, "hcall-vphn"}, + {FW_FEATURE_SET_MODE, "hcall-set-mode"}, + {FW_FEATURE_BEST_ENERGY, "hcall-best-energy-1*"}, + {FW_FEATURE_HPT_RESIZE, "hcall-hpt-resize"}, + {FW_FEATURE_BLOCK_REMOVE, "hcall-block-remove"}, + {FW_FEATURE_PAPR_SCM, "hcall-scm"}, + {FW_FEATURE_RPT_INVALIDATE, "hcall-rpt-invalidate"}, +}; + +/* Build up the firmware features bitmask using the contents of + * device-tree/ibm,hypertas-functions. Ultimately this functionality may + * be moved into prom.c prom_init(). + */ +static void __init fw_hypertas_feature_init(const char *hypertas, + unsigned long len) +{ + const char *s; + int i; + + pr_debug(" -> fw_hypertas_feature_init()\n"); + + for (s = hypertas; s < hypertas + len; s += strlen(s) + 1) { + for (i = 0; i < ARRAY_SIZE(hypertas_fw_features_table); i++) { + const char *name = hypertas_fw_features_table[i].name; + size_t size; + + /* + * If there is a '*' at the end of name, only check + * upto there + */ + size = strlen(name); + if (size && name[size - 1] == '*') { + if (strncmp(name, s, size - 1)) + continue; + } else if (strcmp(name, s)) + continue; + + /* we have a match */ + powerpc_firmware_features |= + hypertas_fw_features_table[i].val; + break; + } + } + + if (is_secure_guest() && + (powerpc_firmware_features & FW_FEATURE_PUT_TCE_IND)) { + powerpc_firmware_features &= ~FW_FEATURE_PUT_TCE_IND; + pr_debug("SVM: disabling PUT_TCE_IND firmware feature\n"); + } + + pr_debug(" <- fw_hypertas_feature_init()\n"); +} + +struct vec5_fw_feature { + unsigned long val; + unsigned int feature; +}; + +static __initdata struct vec5_fw_feature +vec5_fw_features_table[] = { + {FW_FEATURE_FORM1_AFFINITY, OV5_FORM1_AFFINITY}, + {FW_FEATURE_PRRN, OV5_PRRN}, + {FW_FEATURE_DRMEM_V2, OV5_DRMEM_V2}, + {FW_FEATURE_DRC_INFO, OV5_DRC_INFO}, + {FW_FEATURE_FORM2_AFFINITY, OV5_FORM2_AFFINITY}, +}; + +static void __init fw_vec5_feature_init(const char *vec5, unsigned long len) +{ + unsigned int index, feat; + int i; + + pr_debug(" -> fw_vec5_feature_init()\n"); + + for (i = 0; i < ARRAY_SIZE(vec5_fw_features_table); i++) { + index = OV5_INDX(vec5_fw_features_table[i].feature); + feat = OV5_FEAT(vec5_fw_features_table[i].feature); + + if (index < len && (vec5[index] & feat)) + powerpc_firmware_features |= + vec5_fw_features_table[i].val; + } + + pr_debug(" <- fw_vec5_feature_init()\n"); +} + +/* + * Called very early, MMU is off, device-tree isn't unflattened + */ +static int __init probe_fw_features(unsigned long node, const char *uname, int + depth, void *data) +{ + const char *prop; + int len; + static int hypertas_found; + static int vec5_found; + + if (depth != 1) + return 0; + + if (!strcmp(uname, "rtas") || !strcmp(uname, "rtas@0")) { + prop = of_get_flat_dt_prop(node, "ibm,hypertas-functions", + &len); + if (prop) { + powerpc_firmware_features |= FW_FEATURE_LPAR; + fw_hypertas_feature_init(prop, len); + } + + hypertas_found = 1; + } + + if (!strcmp(uname, "chosen")) { + prop = of_get_flat_dt_prop(node, "ibm,architecture-vec-5", + &len); + if (prop) + fw_vec5_feature_init(prop, len); + + vec5_found = 1; + } + + return hypertas_found && vec5_found; +} + +void __init pseries_probe_fw_features(void) +{ + of_scan_flat_dt(probe_fw_features, NULL); +} |