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187 lines
4.9 KiB
187 lines
4.9 KiB
// SPDX-License-Identifier: GPL-2.0-or-later |
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/* |
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* pSeries firmware setup code. |
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* |
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* Portions from arch/powerpc/platforms/pseries/setup.c: |
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* Copyright (C) 1995 Linus Torvalds |
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* Adapted from 'alpha' version by Gary Thomas |
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* Modified by Cort Dougan ([email protected]) |
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* Modified by PPC64 Team, IBM Corp |
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* |
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* Portions from arch/powerpc/kernel/firmware.c |
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* Copyright (C) 2001 Ben. Herrenschmidt ([email protected]) |
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* Modifications for ppc64: |
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* Copyright (C) 2003 Dave Engebretsen <[email protected]> |
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* Copyright (C) 2005 Stephen Rothwell, IBM Corporation |
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* |
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* Copyright 2006 IBM Corporation. |
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*/ |
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#include <linux/of_fdt.h> |
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#include <asm/firmware.h> |
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#include <asm/prom.h> |
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#include <asm/udbg.h> |
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#include <asm/svm.h> |
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#include "pseries.h" |
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struct hypertas_fw_feature { |
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unsigned long val; |
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char * name; |
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}; |
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/* |
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* The names in this table match names in rtas/ibm,hypertas-functions. If the |
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* entry ends in a '*', only upto the '*' is matched. Otherwise the entire |
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* string must match. |
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*/ |
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static __initdata struct hypertas_fw_feature |
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hypertas_fw_features_table[] = { |
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{FW_FEATURE_PFT, "hcall-pft"}, |
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{FW_FEATURE_TCE, "hcall-tce"}, |
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{FW_FEATURE_SPRG0, "hcall-sprg0"}, |
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{FW_FEATURE_DABR, "hcall-dabr"}, |
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{FW_FEATURE_COPY, "hcall-copy"}, |
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{FW_FEATURE_ASR, "hcall-asr"}, |
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{FW_FEATURE_DEBUG, "hcall-debug"}, |
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{FW_FEATURE_PERF, "hcall-perf"}, |
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{FW_FEATURE_DUMP, "hcall-dump"}, |
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{FW_FEATURE_INTERRUPT, "hcall-interrupt"}, |
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{FW_FEATURE_MIGRATE, "hcall-migrate"}, |
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{FW_FEATURE_PERFMON, "hcall-perfmon"}, |
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{FW_FEATURE_CRQ, "hcall-crq"}, |
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{FW_FEATURE_VIO, "hcall-vio"}, |
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{FW_FEATURE_RDMA, "hcall-rdma"}, |
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{FW_FEATURE_LLAN, "hcall-lLAN"}, |
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{FW_FEATURE_BULK_REMOVE, "hcall-bulk"}, |
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{FW_FEATURE_XDABR, "hcall-xdabr"}, |
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{FW_FEATURE_PUT_TCE_IND | FW_FEATURE_STUFF_TCE, |
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"hcall-multi-tce"}, |
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{FW_FEATURE_SPLPAR, "hcall-splpar"}, |
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{FW_FEATURE_VPHN, "hcall-vphn"}, |
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{FW_FEATURE_SET_MODE, "hcall-set-mode"}, |
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{FW_FEATURE_BEST_ENERGY, "hcall-best-energy-1*"}, |
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{FW_FEATURE_HPT_RESIZE, "hcall-hpt-resize"}, |
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{FW_FEATURE_BLOCK_REMOVE, "hcall-block-remove"}, |
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{FW_FEATURE_PAPR_SCM, "hcall-scm"}, |
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{FW_FEATURE_RPT_INVALIDATE, "hcall-rpt-invalidate"}, |
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}; |
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/* Build up the firmware features bitmask using the contents of |
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* device-tree/ibm,hypertas-functions. Ultimately this functionality may |
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* be moved into prom.c prom_init(). |
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*/ |
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static void __init fw_hypertas_feature_init(const char *hypertas, |
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unsigned long len) |
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{ |
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const char *s; |
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int i; |
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pr_debug(" -> fw_hypertas_feature_init()\n"); |
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for (s = hypertas; s < hypertas + len; s += strlen(s) + 1) { |
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for (i = 0; i < ARRAY_SIZE(hypertas_fw_features_table); i++) { |
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const char *name = hypertas_fw_features_table[i].name; |
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size_t size; |
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/* |
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* If there is a '*' at the end of name, only check |
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* upto there |
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*/ |
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size = strlen(name); |
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if (size && name[size - 1] == '*') { |
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if (strncmp(name, s, size - 1)) |
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continue; |
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} else if (strcmp(name, s)) |
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continue; |
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/* we have a match */ |
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powerpc_firmware_features |= |
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hypertas_fw_features_table[i].val; |
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break; |
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} |
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} |
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if (is_secure_guest() && |
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(powerpc_firmware_features & FW_FEATURE_PUT_TCE_IND)) { |
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powerpc_firmware_features &= ~FW_FEATURE_PUT_TCE_IND; |
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pr_debug("SVM: disabling PUT_TCE_IND firmware feature\n"); |
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} |
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pr_debug(" <- fw_hypertas_feature_init()\n"); |
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} |
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struct vec5_fw_feature { |
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unsigned long val; |
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unsigned int feature; |
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}; |
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static __initdata struct vec5_fw_feature |
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vec5_fw_features_table[] = { |
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{FW_FEATURE_TYPE1_AFFINITY, OV5_TYPE1_AFFINITY}, |
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{FW_FEATURE_PRRN, OV5_PRRN}, |
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{FW_FEATURE_DRMEM_V2, OV5_DRMEM_V2}, |
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{FW_FEATURE_DRC_INFO, OV5_DRC_INFO}, |
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}; |
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static void __init fw_vec5_feature_init(const char *vec5, unsigned long len) |
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{ |
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unsigned int index, feat; |
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int i; |
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pr_debug(" -> fw_vec5_feature_init()\n"); |
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for (i = 0; i < ARRAY_SIZE(vec5_fw_features_table); i++) { |
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index = OV5_INDX(vec5_fw_features_table[i].feature); |
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feat = OV5_FEAT(vec5_fw_features_table[i].feature); |
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if (index < len && (vec5[index] & feat)) |
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powerpc_firmware_features |= |
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vec5_fw_features_table[i].val; |
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} |
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pr_debug(" <- fw_vec5_feature_init()\n"); |
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} |
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/* |
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* Called very early, MMU is off, device-tree isn't unflattened |
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*/ |
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static int __init probe_fw_features(unsigned long node, const char *uname, int |
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depth, void *data) |
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{ |
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const char *prop; |
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int len; |
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static int hypertas_found; |
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static int vec5_found; |
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if (depth != 1) |
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return 0; |
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if (!strcmp(uname, "rtas") || !strcmp(uname, "rtas@0")) { |
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prop = of_get_flat_dt_prop(node, "ibm,hypertas-functions", |
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&len); |
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if (prop) { |
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powerpc_firmware_features |= FW_FEATURE_LPAR; |
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fw_hypertas_feature_init(prop, len); |
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} |
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hypertas_found = 1; |
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} |
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if (!strcmp(uname, "chosen")) { |
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prop = of_get_flat_dt_prop(node, "ibm,architecture-vec-5", |
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&len); |
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if (prop) |
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fw_vec5_feature_init(prop, len); |
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vec5_found = 1; |
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} |
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return hypertas_found && vec5_found; |
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} |
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void __init pseries_probe_fw_features(void) |
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{ |
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of_scan_flat_dt(probe_fw_features, NULL); |
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}
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