gen_facilities.c

  1// SPDX-License-Identifier: GPL-2.0
  2/*
  3 * Simple program to generate defines out of facility lists that use the bit
  4 * numbering scheme from the Princples of Operations: most significant bit
  5 * has bit number 0.
  6 *
  7 *    Copyright IBM Corp. 2015, 2018
  8 *
  9 */
 10
 11#include <strings.h>
 12#include <string.h>
 13#include <stdlib.h>
 14#include <stdio.h>
 15
 16struct facility_def {
 17	char *name;
 18	int *bits;
 19};
 20
 21static struct facility_def facility_defs[] = {
 22	{
 23		/*
 24		 * FACILITIES_ALS contains the list of facilities that are
 25		 * required to run a kernel that is compiled e.g. with
 26		 * -march=<machine>.
 27		 */
 28		.name = "FACILITIES_ALS",
 29		.bits = (int[]){
 30			0,  /* N3 instructions */
 31			1,  /* z/Arch mode installed */
 32			3,  /* dat-enhancement 1 */
 33			18, /* long displacement facility */
 34			21, /* extended-immediate facility */
 35			25, /* store clock fast */
 36			27, /* mvcos */
 37			32, /* compare and swap and store */
 38			33, /* compare and swap and store 2 */
 39			34, /* general instructions extension */
 40			35, /* execute extensions */
 41#ifdef CONFIG_HAVE_MARCH_Z196_FEATURES
 42			45, /* fast-BCR, etc. */
 43#endif
 44#ifdef CONFIG_HAVE_MARCH_ZEC12_FEATURES
 45			49, /* misc-instruction-extensions */
 46			52, /* interlocked facility 2 */
 47#endif
 48#ifdef CONFIG_HAVE_MARCH_Z13_FEATURES
 49			53, /* load-and-zero-rightmost-byte, etc. */
 50			129, /* vector */
 51#endif
 52#ifdef CONFIG_HAVE_MARCH_Z14_FEATURES
 53			58, /* miscellaneous-instruction-extension 2 */
 54#endif
 55#ifdef CONFIG_HAVE_MARCH_Z15_FEATURES
 56			61, /* miscellaneous-instruction-extension 3 */
 57#endif
 58#ifdef CONFIG_HAVE_MARCH_Z17_FEATURES
 59			84, /* miscellaneous-instruction-extension 4 */
 60#endif
 61			-1 /* END */
 62		}
 63	},
 64	{
 65		/*
 66		 * FACILITIES_KVM contains the list of facilities that are part
 67		 * of the default facility mask and list that are passed to the
 68		 * initial CPU model. If no CPU model is used, this, together
 69		 * with the non-hypervisor managed bits, is the maximum list of
 70		 * guest facilities supported by KVM.
 71		 */
 72		.name = "FACILITIES_KVM",
 73		.bits = (int[]){
 74			0,  /* N3 instructions */
 75			1,  /* z/Arch mode installed */
 76			2,  /* z/Arch mode active */
 77			3,  /* DAT-enhancement */
 78			4,  /* idte segment table */
 79			5,  /* idte region table */
 80			6,  /* ASN-and-LX reuse */
 81			7,  /* stfle */
 82			8,  /* enhanced-DAT 1 */
 83			9,  /* sense-running-status */
 84			10, /* conditional sske */
 85			13, /* ipte-range */
 86			14, /* nonquiescing key-setting */
 87			73, /* transactional execution */
 88			75, /* access-exception-fetch/store indication */
 89			76, /* msa extension 3 */
 90			77, /* msa extension 4 */
 91			78, /* enhanced-DAT 2 */
 92			130, /* instruction-execution-protection */
 93			131, /* enhanced-SOP 2 and side-effect */
 94			139, /* multiple epoch facility */
 95			146, /* msa extension 8 */
 96			150, /* enhanced sort */
 97			151, /* deflate conversion */
 98			155, /* msa extension 9 */
 99			-1  /* END */
100		}
101	},
102	{
103		/*
104		 * FACILITIES_KVM_CPUMODEL contains the list of facilities
105		 * that can be enabled by CPU model code if the host supports
106		 * it. These facilities are not passed to the guest without
107		 * CPU model support.
108		 */
109
110		.name = "FACILITIES_KVM_CPUMODEL",
111		.bits = (int[]){
112			12, /* AP Query Configuration Information */
113			15, /* AP Facilities Test */
114			156, /* etoken facility */
115			165, /* nnpa facility */
116			170, /* ineffective-nonconstrained-transaction facility */
117			193, /* bear enhancement facility */
118			194, /* rdp enhancement facility */
119			196, /* processor activity instrumentation facility */
120			197, /* processor activity instrumentation extension 1 */
121			201, /* concurrent-functions facility */
122			-1  /* END */
123		}
124	},
125};
126
127static void print_facility_list(struct facility_def *def)
128{
129	unsigned int high, bit, dword, i;
130	unsigned long long *array;
131
132	array = calloc(1, 8);
133	if (!array)
134		exit(EXIT_FAILURE);
135	high = 0;
136	for (i = 0; def->bits[i] != -1; i++) {
137		bit = 63 - (def->bits[i] & 63);
138		dword = def->bits[i] / 64;
139		if (dword > high) {
140			array = realloc(array, (dword + 1) * 8);
141			if (!array)
142				exit(EXIT_FAILURE);
143			memset(array + high + 1, 0, (dword - high) * 8);
144			high = dword;
145		}
146		array[dword] |= 1ULL << bit;
147	}
148	printf("#define %s ", def->name);
149	for (i = 0; i <= high; i++)
150		printf("_AC(0x%016llx,UL)%c", array[i], i < high ? ',' : '\n');
151	free(array);
152}
153
154static void print_facility_lists(void)
155{
156	unsigned int i;
157
158	for (i = 0; i < sizeof(facility_defs) / sizeof(facility_defs[0]); i++)
159		print_facility_list(&facility_defs[i]);
160}
161
162int main(int argc, char **argv)
163{
164	printf("#ifndef __ASM_S390_FACILITY_DEFS__\n");
165	printf("#define __ASM_S390_FACILITY_DEFS__\n");
166	printf("/*\n");
167	printf(" * DO NOT MODIFY.\n");
168	printf(" *\n");
169	printf(" * This file was generated by %s\n", __FILE__);
170	printf(" */\n\n");
171	printf("#include <linux/const.h>\n\n");
172	print_facility_lists();
173	printf("\n#endif\n");
174	return 0;
175}