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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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5d88aa85c0
Platform events such as partition migration or the new PRRN firmware feature can cause the NUMA characteristics of a CPU to change, and these changes will be reflected in the device tree nodes for the affected CPUs. This patch registers a handler for Open Firmware device tree updates and reconfigures the CPU and node maps whenever the associativity changes. Currently, this is accomplished by marking the affected CPUs in the cpu_associativity_changes_mask and allowing arch_update_cpu_topology() to retrieve the new associativity information using hcall_vphn(). Protecting the NUMA cpu maps from concurrent access during an update operation will be addressed in a subsequent patch in this series. Signed-off-by: Nathan Fontenot <nfont@linux.vnet.ibm.com> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
134 lines
3.7 KiB
C
134 lines
3.7 KiB
C
/*
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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 (cort@cs.nmt.edu)
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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 (benh@kernel.crashing.org)
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* Modifications for ppc64:
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* Copyright (C) 2003 Dave Engebretsen <engebret@us.ibm.com>
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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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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version
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* 2 of the License, or (at your option) any later version.
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*/
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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 "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_MULTITCE, "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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};
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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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void __init fw_hypertas_feature_init(const char *hypertas, 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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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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};
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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 (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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