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-rw-r--r--arch/s390/kernel/early.c109
-rw-r--r--arch/s390/kernel/head31.S61
-rw-r--r--arch/s390/kernel/head64.S62
-rw-r--r--arch/s390/kernel/setup.c2
4 files changed, 107 insertions, 127 deletions
diff --git a/arch/s390/kernel/early.c b/arch/s390/kernel/early.c
index 68ec4083bf73..bd188f6bd0e2 100644
--- a/arch/s390/kernel/early.c
+++ b/arch/s390/kernel/early.c
@@ -139,15 +139,15 @@ static noinline __init void detect_machine_type(void)
139 139
140 /* Running under z/VM ? */ 140 /* Running under z/VM ? */
141 if (cpuinfo->cpu_id.version == 0xff) 141 if (cpuinfo->cpu_id.version == 0xff)
142 machine_flags |= 1; 142 machine_flags |= MACHINE_FLAG_VM;
143 143
144 /* Running on a P/390 ? */ 144 /* Running on a P/390 ? */
145 if (cpuinfo->cpu_id.machine == 0x7490) 145 if (cpuinfo->cpu_id.machine == 0x7490)
146 machine_flags |= 4; 146 machine_flags |= MACHINE_FLAG_P390;
147 147
148 /* Running under KVM ? */ 148 /* Running under KVM ? */
149 if (cpuinfo->cpu_id.version == 0xfe) 149 if (cpuinfo->cpu_id.version == 0xfe)
150 machine_flags |= 64; 150 machine_flags |= MACHINE_FLAG_KVM;
151} 151}
152 152
153#ifdef CONFIG_64BIT 153#ifdef CONFIG_64BIT
@@ -268,6 +268,103 @@ static noinline __init void setup_lowcore_early(void)
268 s390_base_pgm_handler_fn = early_pgm_check_handler; 268 s390_base_pgm_handler_fn = early_pgm_check_handler;
269} 269}
270 270
271static __init void detect_mvpg(void)
272{
273#ifndef CONFIG_64BIT
274 int rc;
275
276 asm volatile(
277 " la 0,0\n"
278 " mvpg %2,%2\n"
279 "0: la %0,0\n"
280 "1:\n"
281 EX_TABLE(0b,1b)
282 : "=d" (rc) : "0" (-EOPNOTSUPP), "a" (0) : "memory", "cc", "0");
283 if (!rc)
284 machine_flags |= MACHINE_FLAG_MVPG;
285#endif
286}
287
288static __init void detect_ieee(void)
289{
290#ifndef CONFIG_64BIT
291 int rc, tmp;
292
293 asm volatile(
294 " efpc %1,0\n"
295 "0: la %0,0\n"
296 "1:\n"
297 EX_TABLE(0b,1b)
298 : "=d" (rc), "=d" (tmp): "0" (-EOPNOTSUPP) : "cc");
299 if (!rc)
300 machine_flags |= MACHINE_FLAG_IEEE;
301#endif
302}
303
304static __init void detect_csp(void)
305{
306#ifndef CONFIG_64BIT
307 int rc;
308
309 asm volatile(
310 " la 0,0\n"
311 " la 1,0\n"
312 " la 2,4\n"
313 " csp 0,2\n"
314 "0: la %0,0\n"
315 "1:\n"
316 EX_TABLE(0b,1b)
317 : "=d" (rc) : "0" (-EOPNOTSUPP) : "cc", "0", "1", "2");
318 if (!rc)
319 machine_flags |= MACHINE_FLAG_CSP;
320#endif
321}
322
323static __init void detect_diag9c(void)
324{
325 unsigned int cpu_address;
326 int rc;
327
328 cpu_address = stap();
329 asm volatile(
330 " diag %2,0,0x9c\n"
331 "0: la %0,0\n"
332 "1:\n"
333 EX_TABLE(0b,1b)
334 : "=d" (rc) : "0" (-EOPNOTSUPP), "d" (cpu_address) : "cc");
335 if (!rc)
336 machine_flags |= MACHINE_FLAG_DIAG9C;
337}
338
339static __init void detect_diag44(void)
340{
341#ifdef CONFIG_64BIT
342 int rc;
343
344 asm volatile(
345 " diag 0,0,0x44\n"
346 "0: la %0,0\n"
347 "1:\n"
348 EX_TABLE(0b,1b)
349 : "=d" (rc) : "0" (-EOPNOTSUPP) : "cc");
350 if (!rc)
351 machine_flags |= MACHINE_FLAG_DIAG44;
352#endif
353}
354
355static __init void detect_machine_facilities(void)
356{
357#ifdef CONFIG_64BIT
358 unsigned int facilities;
359
360 facilities = stfl();
361 if (facilities & (1 << 28))
362 machine_flags |= MACHINE_FLAG_IDTE;
363 if (facilities & (1 << 4))
364 machine_flags |= MACHINE_FLAG_MVCOS;
365#endif
366}
367
271/* 368/*
272 * Save ipl parameters, clear bss memory, initialize storage keys 369 * Save ipl parameters, clear bss memory, initialize storage keys
273 * and create a kernel NSS at startup if the SAVESYS= parm is defined 370 * and create a kernel NSS at startup if the SAVESYS= parm is defined
@@ -285,6 +382,12 @@ void __init startup_init(void)
285 create_kernel_nss(); 382 create_kernel_nss();
286 sort_main_extable(); 383 sort_main_extable();
287 setup_lowcore_early(); 384 setup_lowcore_early();
385 detect_mvpg();
386 detect_ieee();
387 detect_csp();
388 detect_diag9c();
389 detect_diag44();
390 detect_machine_facilities();
288 sclp_read_info_early(); 391 sclp_read_info_early();
289 sclp_facilities_detect(); 392 sclp_facilities_detect();
290 memsize = sclp_memory_detect(); 393 memsize = sclp_memory_detect();
diff --git a/arch/s390/kernel/head31.S b/arch/s390/kernel/head31.S
index dc364c1419af..a816e2de32b9 100644
--- a/arch/s390/kernel/head31.S
+++ b/arch/s390/kernel/head31.S
@@ -57,61 +57,6 @@ startup_continue:
57# 57#
58 l %r14,.Lstartup_init-.LPG1(%r13) 58 l %r14,.Lstartup_init-.LPG1(%r13)
59 basr %r14,%r14 59 basr %r14,%r14
60
61 l %r12,.Lmflags-.LPG1(%r13) # get address of machine_flags
62#
63# find out if we have an IEEE fpu
64#
65 mvc __LC_PGM_NEW_PSW(8),.Lpcfpu-.LPG1(%r13)
66 efpc %r0,0 # test IEEE extract fpc instruction
67 oi 3(%r12),2 # set IEEE fpu flag
68.Lchkfpu:
69
70#
71# find out if we have the CSP instruction
72#
73 mvc __LC_PGM_NEW_PSW(8),.Lpccsp-.LPG1(%r13)
74 la %r0,0
75 lr %r1,%r0
76 la %r2,4
77 csp %r0,%r2 # Test CSP instruction
78 oi 3(%r12),8 # set CSP flag
79.Lchkcsp:
80
81#
82# find out if we have the MVPG instruction
83#
84 mvc __LC_PGM_NEW_PSW(8),.Lpcmvpg-.LPG1(%r13)
85 sr %r0,%r0
86 la %r1,0
87 la %r2,0
88 mvpg %r1,%r2 # Test CSP instruction
89 oi 3(%r12),16 # set MVPG flag
90.Lchkmvpg:
91
92#
93# find out if we have the IDTE instruction
94#
95 mvc __LC_PGM_NEW_PSW(8),.Lpcidte-.LPG1(%r13)
96 .long 0xb2b10000 # store facility list
97 tm 0xc8,0x08 # check bit for clearing-by-ASCE
98 bno .Lchkidte-.LPG1(%r13)
99 lhi %r1,2094
100 lhi %r2,0
101 .long 0xb98e2001
102 oi 3(%r12),0x80 # set IDTE flag
103.Lchkidte:
104
105#
106# find out if the diag 0x9c is available
107#
108 mvc __LC_PGM_NEW_PSW(8),.Lpcdiag9c-.LPG1(%r13)
109 stap __LC_CPUID+4 # store cpu address
110 lh %r1,__LC_CPUID+4
111 diag %r1,0,0x9c # test diag 0x9c
112 oi 2(%r12),1 # set diag9c flag
113.Lchkdiag9c:
114
115 lpsw .Lentry-.LPG1(13) # jump to _stext in primary-space, 60 lpsw .Lentry-.LPG1(13) # jump to _stext in primary-space,
116 # virtual and never return ... 61 # virtual and never return ...
117 .align 8 62 .align 8
@@ -132,13 +77,7 @@ startup_continue:
132 .long 0 # cr13: home space segment table 77 .long 0 # cr13: home space segment table
133 .long 0xc0000000 # cr14: machine check handling off 78 .long 0xc0000000 # cr14: machine check handling off
134 .long 0 # cr15: linkage stack operations 79 .long 0 # cr15: linkage stack operations
135.Lpcfpu:.long 0x00080000,0x80000000 + .Lchkfpu
136.Lpccsp:.long 0x00080000,0x80000000 + .Lchkcsp
137.Lpcmvpg:.long 0x00080000,0x80000000 + .Lchkmvpg
138.Lpcidte:.long 0x00080000,0x80000000 + .Lchkidte
139.Lpcdiag9c:.long 0x00080000,0x80000000 + .Lchkdiag9c
140.Lmchunk:.long memory_chunk 80.Lmchunk:.long memory_chunk
141.Lmflags:.long machine_flags
142.Lbss_bgn: .long __bss_start 81.Lbss_bgn: .long __bss_start
143.Lbss_end: .long _end 82.Lbss_end: .long _end
144.Lparmaddr: .long PARMAREA 83.Lparmaddr: .long PARMAREA
diff --git a/arch/s390/kernel/head64.S b/arch/s390/kernel/head64.S
index 79dccd206a6e..9c2c6f7d37e7 100644
--- a/arch/s390/kernel/head64.S
+++ b/arch/s390/kernel/head64.S
@@ -125,68 +125,6 @@ startup_continue:
125# and create a kernel NSS if the SAVESYS= parm is defined 125# and create a kernel NSS if the SAVESYS= parm is defined
126# 126#
127 brasl %r14,startup_init 127 brasl %r14,startup_init
128 # set program check new psw mask
129 mvc __LC_PGM_NEW_PSW(8),.Lpcmsk-.LPG1(%r13)
130 larl %r12,machine_flags
131#
132# find out if we have the MVPG instruction
133#
134 la %r1,0f-.LPG1(%r13) # set program check address
135 stg %r1,__LC_PGM_NEW_PSW+8
136 sgr %r0,%r0
137 lghi %r1,0
138 lghi %r2,0
139 mvpg %r1,%r2 # test MVPG instruction
140 oi 7(%r12),16 # set MVPG flag
1410:
142
143#
144# find out if the diag 0x44 works in 64 bit mode
145#
146 la %r1,0f-.LPG1(%r13) # set program check address
147 stg %r1,__LC_PGM_NEW_PSW+8
148 diag 0,0,0x44 # test diag 0x44
149 oi 7(%r12),32 # set diag44 flag
1500:
151
152#
153# find out if we have the IDTE instruction
154#
155 la %r1,0f-.LPG1(%r13) # set program check address
156 stg %r1,__LC_PGM_NEW_PSW+8
157 .long 0xb2b10000 # store facility list
158 tm 0xc8,0x08 # check bit for clearing-by-ASCE
159 bno 0f-.LPG1(%r13)
160 lhi %r1,2048
161 lhi %r2,0
162 .long 0xb98e2001
163 oi 7(%r12),0x80 # set IDTE flag
1640:
165
166#
167# find out if the diag 0x9c is available
168#
169 la %r1,0f-.LPG1(%r13) # set program check address
170 stg %r1,__LC_PGM_NEW_PSW+8
171 stap __LC_CPUID+4 # store cpu address
172 lh %r1,__LC_CPUID+4
173 diag %r1,0,0x9c # test diag 0x9c
174 oi 6(%r12),1 # set diag9c flag
1750:
176
177#
178# find out if we have the MVCOS instruction
179#
180 la %r1,0f-.LPG1(%r13) # set program check address
181 stg %r1,__LC_PGM_NEW_PSW+8
182 .short 0xc800 # mvcos 0(%r0),0(%r0),%r0
183 .short 0x0000
184 .short 0x0000
1850: tm 0x8f,0x13 # special-operation exception?
186 bno 1f-.LPG1(%r13) # if yes, MVCOS is present
187 oi 6(%r12),2 # set MVCOS flag
1881:
189
190 lpswe .Lentry-.LPG1(13) # jump to _stext in primary-space, 128 lpswe .Lentry-.LPG1(13) # jump to _stext in primary-space,
191 # virtual and never return ... 129 # virtual and never return ...
192 .align 16 130 .align 16
diff --git a/arch/s390/kernel/setup.c b/arch/s390/kernel/setup.c
index 024180e25e85..694c6546ce64 100644
--- a/arch/s390/kernel/setup.c
+++ b/arch/s390/kernel/setup.c
@@ -73,7 +73,7 @@ EXPORT_SYMBOL(uaccess);
73unsigned int console_mode = 0; 73unsigned int console_mode = 0;
74unsigned int console_devno = -1; 74unsigned int console_devno = -1;
75unsigned int console_irq = -1; 75unsigned int console_irq = -1;
76unsigned long machine_flags = 0; 76unsigned long machine_flags;
77unsigned long elf_hwcap = 0; 77unsigned long elf_hwcap = 0;
78char elf_platform[ELF_PLATFORM_SIZE]; 78char elf_platform[ELF_PLATFORM_SIZE];
79 79
generated by cgit v1.2.2 (git 2.25.0) at 2024-12-18 19:32:48 -0500