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e2741f1758
The __cpuinit type of throwaway sections might have made sense
some time ago when RAM was more constrained, but now the savings
do not offset the cost and complications. For example, the fix in
commit 5e427ec2d0
("x86: Fix bit corruption at CPU resume time")
is a good example of the nasty type of bugs that can be created
with improper use of the various __init prefixes.
After a discussion on LKML[1] it was decided that cpuinit should go
the way of devinit and be phased out. Once all the users are gone,
we can then finally remove the macros themselves from linux/init.h.
Note that some harmless section mismatch warnings may result, since
notify_cpu_starting() and cpu_up() are arch independent (kernel/cpu.c)
are flagged as __cpuinit -- so if we remove the __cpuinit from
arch specific callers, we will also get section mismatch warnings.
As an intermediate step, we intend to turn the linux/init.h cpuinit
content into no-ops as early as possible, since that will get rid
of these warnings. In any case, they are temporary and harmless.
This removes all the arch/s390 uses of the __cpuinit macros from
all C files. Currently s390 does not have any __CPUINIT used in
assembly files.
[1] https://lkml.org/lkml/2013/5/20/589
Cc: Martin Schwidefsky <schwidefsky@de.ibm.com>
Cc: Heiko Carstens <heiko.carstens@de.ibm.com>
Cc: linux390@de.ibm.com
Cc: linux-s390@vger.kernel.org
Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
429 lines
12 KiB
C
429 lines
12 KiB
C
/*
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* Copyright IBM Corp. 2001, 2009
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* Author(s): Ulrich Weigand <Ulrich.Weigand@de.ibm.com>,
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* Martin Schwidefsky <schwidefsky@de.ibm.com>,
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*/
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#include <linux/kernel.h>
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#include <linux/mm.h>
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#include <linux/proc_fs.h>
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#include <linux/seq_file.h>
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#include <linux/init.h>
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#include <linux/delay.h>
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#include <linux/module.h>
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#include <linux/slab.h>
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#include <asm/ebcdic.h>
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#include <asm/sysinfo.h>
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#include <asm/cpcmd.h>
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#include <asm/topology.h>
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/* Sigh, math-emu. Don't ask. */
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#include <asm/sfp-util.h>
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#include <math-emu/soft-fp.h>
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#include <math-emu/single.h>
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int topology_max_mnest;
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/*
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* stsi - store system information
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*
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* Returns the current configuration level if function code 0 was specified.
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* Otherwise returns 0 on success or a negative value on error.
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*/
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int stsi(void *sysinfo, int fc, int sel1, int sel2)
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{
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register int r0 asm("0") = (fc << 28) | sel1;
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register int r1 asm("1") = sel2;
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int rc = 0;
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asm volatile(
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" stsi 0(%3)\n"
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"0: jz 2f\n"
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"1: lhi %1,%4\n"
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"2:\n"
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EX_TABLE(0b, 1b)
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: "+d" (r0), "+d" (rc)
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: "d" (r1), "a" (sysinfo), "K" (-EOPNOTSUPP)
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: "cc", "memory");
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if (rc)
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return rc;
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return fc ? 0 : ((unsigned int) r0) >> 28;
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}
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EXPORT_SYMBOL(stsi);
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static void stsi_1_1_1(struct seq_file *m, struct sysinfo_1_1_1 *info)
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{
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int i;
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if (stsi(info, 1, 1, 1))
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return;
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EBCASC(info->manufacturer, sizeof(info->manufacturer));
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EBCASC(info->type, sizeof(info->type));
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EBCASC(info->model, sizeof(info->model));
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EBCASC(info->sequence, sizeof(info->sequence));
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EBCASC(info->plant, sizeof(info->plant));
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EBCASC(info->model_capacity, sizeof(info->model_capacity));
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EBCASC(info->model_perm_cap, sizeof(info->model_perm_cap));
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EBCASC(info->model_temp_cap, sizeof(info->model_temp_cap));
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seq_printf(m, "Manufacturer: %-16.16s\n", info->manufacturer);
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seq_printf(m, "Type: %-4.4s\n", info->type);
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/*
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* Sigh: the model field has been renamed with System z9
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* to model_capacity and a new model field has been added
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* after the plant field. To avoid confusing older programs
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* the "Model:" prints "model_capacity model" or just
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* "model_capacity" if the model string is empty .
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*/
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seq_printf(m, "Model: %-16.16s", info->model_capacity);
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if (info->model[0] != '\0')
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seq_printf(m, " %-16.16s", info->model);
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seq_putc(m, '\n');
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seq_printf(m, "Sequence Code: %-16.16s\n", info->sequence);
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seq_printf(m, "Plant: %-4.4s\n", info->plant);
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seq_printf(m, "Model Capacity: %-16.16s %08u\n",
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info->model_capacity, info->model_cap_rating);
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if (info->model_perm_cap_rating)
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seq_printf(m, "Model Perm. Capacity: %-16.16s %08u\n",
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info->model_perm_cap,
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info->model_perm_cap_rating);
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if (info->model_temp_cap_rating)
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seq_printf(m, "Model Temp. Capacity: %-16.16s %08u\n",
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info->model_temp_cap,
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info->model_temp_cap_rating);
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if (info->ncr)
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seq_printf(m, "Nominal Cap. Rating: %08u\n", info->ncr);
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if (info->npr)
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seq_printf(m, "Nominal Perm. Rating: %08u\n", info->npr);
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if (info->ntr)
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seq_printf(m, "Nominal Temp. Rating: %08u\n", info->ntr);
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if (info->cai) {
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seq_printf(m, "Capacity Adj. Ind.: %d\n", info->cai);
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seq_printf(m, "Capacity Ch. Reason: %d\n", info->ccr);
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seq_printf(m, "Capacity Transient: %d\n", info->t);
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}
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if (info->p) {
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for (i = 1; i <= ARRAY_SIZE(info->typepct); i++) {
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seq_printf(m, "Type %d Percentage: %d\n",
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i, info->typepct[i - 1]);
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}
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}
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}
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static void stsi_15_1_x(struct seq_file *m, struct sysinfo_15_1_x *info)
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{
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static int max_mnest;
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int i, rc;
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seq_putc(m, '\n');
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if (!MACHINE_HAS_TOPOLOGY)
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return;
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if (stsi(info, 15, 1, topology_max_mnest))
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return;
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seq_printf(m, "CPU Topology HW: ");
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for (i = 0; i < TOPOLOGY_NR_MAG; i++)
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seq_printf(m, " %d", info->mag[i]);
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seq_putc(m, '\n');
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#ifdef CONFIG_SCHED_MC
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store_topology(info);
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seq_printf(m, "CPU Topology SW: ");
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for (i = 0; i < TOPOLOGY_NR_MAG; i++)
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seq_printf(m, " %d", info->mag[i]);
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seq_putc(m, '\n');
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#endif
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}
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static void stsi_1_2_2(struct seq_file *m, struct sysinfo_1_2_2 *info)
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{
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struct sysinfo_1_2_2_extension *ext;
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int i;
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if (stsi(info, 1, 2, 2))
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return;
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ext = (struct sysinfo_1_2_2_extension *)
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((unsigned long) info + info->acc_offset);
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seq_printf(m, "CPUs Total: %d\n", info->cpus_total);
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seq_printf(m, "CPUs Configured: %d\n", info->cpus_configured);
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seq_printf(m, "CPUs Standby: %d\n", info->cpus_standby);
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seq_printf(m, "CPUs Reserved: %d\n", info->cpus_reserved);
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/*
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* Sigh 2. According to the specification the alternate
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* capability field is a 32 bit floating point number
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* if the higher order 8 bits are not zero. Printing
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* a floating point number in the kernel is a no-no,
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* always print the number as 32 bit unsigned integer.
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* The user-space needs to know about the strange
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* encoding of the alternate cpu capability.
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*/
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seq_printf(m, "Capability: %u", info->capability);
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if (info->format == 1)
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seq_printf(m, " %u", ext->alt_capability);
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seq_putc(m, '\n');
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if (info->nominal_cap)
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seq_printf(m, "Nominal Capability: %d\n", info->nominal_cap);
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if (info->secondary_cap)
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seq_printf(m, "Secondary Capability: %d\n", info->secondary_cap);
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for (i = 2; i <= info->cpus_total; i++) {
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seq_printf(m, "Adjustment %02d-way: %u",
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i, info->adjustment[i-2]);
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if (info->format == 1)
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seq_printf(m, " %u", ext->alt_adjustment[i-2]);
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seq_putc(m, '\n');
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}
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}
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static void stsi_2_2_2(struct seq_file *m, struct sysinfo_2_2_2 *info)
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{
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if (stsi(info, 2, 2, 2))
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return;
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EBCASC(info->name, sizeof(info->name));
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seq_putc(m, '\n');
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seq_printf(m, "LPAR Number: %d\n", info->lpar_number);
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seq_printf(m, "LPAR Characteristics: ");
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if (info->characteristics & LPAR_CHAR_DEDICATED)
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seq_printf(m, "Dedicated ");
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if (info->characteristics & LPAR_CHAR_SHARED)
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seq_printf(m, "Shared ");
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if (info->characteristics & LPAR_CHAR_LIMITED)
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seq_printf(m, "Limited ");
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seq_putc(m, '\n');
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seq_printf(m, "LPAR Name: %-8.8s\n", info->name);
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seq_printf(m, "LPAR Adjustment: %d\n", info->caf);
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seq_printf(m, "LPAR CPUs Total: %d\n", info->cpus_total);
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seq_printf(m, "LPAR CPUs Configured: %d\n", info->cpus_configured);
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seq_printf(m, "LPAR CPUs Standby: %d\n", info->cpus_standby);
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seq_printf(m, "LPAR CPUs Reserved: %d\n", info->cpus_reserved);
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seq_printf(m, "LPAR CPUs Dedicated: %d\n", info->cpus_dedicated);
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seq_printf(m, "LPAR CPUs Shared: %d\n", info->cpus_shared);
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}
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static void stsi_3_2_2(struct seq_file *m, struct sysinfo_3_2_2 *info)
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{
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int i;
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if (stsi(info, 3, 2, 2))
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return;
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for (i = 0; i < info->count; i++) {
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EBCASC(info->vm[i].name, sizeof(info->vm[i].name));
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EBCASC(info->vm[i].cpi, sizeof(info->vm[i].cpi));
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seq_putc(m, '\n');
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seq_printf(m, "VM%02d Name: %-8.8s\n", i, info->vm[i].name);
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seq_printf(m, "VM%02d Control Program: %-16.16s\n", i, info->vm[i].cpi);
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seq_printf(m, "VM%02d Adjustment: %d\n", i, info->vm[i].caf);
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seq_printf(m, "VM%02d CPUs Total: %d\n", i, info->vm[i].cpus_total);
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seq_printf(m, "VM%02d CPUs Configured: %d\n", i, info->vm[i].cpus_configured);
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seq_printf(m, "VM%02d CPUs Standby: %d\n", i, info->vm[i].cpus_standby);
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seq_printf(m, "VM%02d CPUs Reserved: %d\n", i, info->vm[i].cpus_reserved);
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}
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}
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static int sysinfo_show(struct seq_file *m, void *v)
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{
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void *info = (void *)get_zeroed_page(GFP_KERNEL);
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int level;
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if (!info)
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return 0;
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level = stsi(NULL, 0, 0, 0);
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if (level >= 1)
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stsi_1_1_1(m, info);
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if (level >= 1)
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stsi_15_1_x(m, info);
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if (level >= 1)
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stsi_1_2_2(m, info);
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if (level >= 2)
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stsi_2_2_2(m, info);
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if (level >= 3)
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stsi_3_2_2(m, info);
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free_page((unsigned long)info);
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return 0;
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}
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static int sysinfo_open(struct inode *inode, struct file *file)
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{
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return single_open(file, sysinfo_show, NULL);
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}
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static const struct file_operations sysinfo_fops = {
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.open = sysinfo_open,
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.read = seq_read,
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.llseek = seq_lseek,
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.release = single_release,
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};
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static int __init sysinfo_create_proc(void)
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{
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proc_create("sysinfo", 0444, NULL, &sysinfo_fops);
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return 0;
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}
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device_initcall(sysinfo_create_proc);
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/*
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* Service levels interface.
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*/
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static DECLARE_RWSEM(service_level_sem);
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static LIST_HEAD(service_level_list);
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int register_service_level(struct service_level *slr)
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{
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struct service_level *ptr;
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down_write(&service_level_sem);
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list_for_each_entry(ptr, &service_level_list, list)
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if (ptr == slr) {
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up_write(&service_level_sem);
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return -EEXIST;
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}
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list_add_tail(&slr->list, &service_level_list);
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up_write(&service_level_sem);
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return 0;
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}
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EXPORT_SYMBOL(register_service_level);
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int unregister_service_level(struct service_level *slr)
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{
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struct service_level *ptr, *next;
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int rc = -ENOENT;
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down_write(&service_level_sem);
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list_for_each_entry_safe(ptr, next, &service_level_list, list) {
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if (ptr != slr)
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continue;
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list_del(&ptr->list);
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rc = 0;
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break;
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}
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up_write(&service_level_sem);
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return rc;
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}
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EXPORT_SYMBOL(unregister_service_level);
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static void *service_level_start(struct seq_file *m, loff_t *pos)
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{
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down_read(&service_level_sem);
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return seq_list_start(&service_level_list, *pos);
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}
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static void *service_level_next(struct seq_file *m, void *p, loff_t *pos)
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{
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return seq_list_next(p, &service_level_list, pos);
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}
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static void service_level_stop(struct seq_file *m, void *p)
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{
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up_read(&service_level_sem);
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}
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static int service_level_show(struct seq_file *m, void *p)
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{
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struct service_level *slr;
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slr = list_entry(p, struct service_level, list);
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slr->seq_print(m, slr);
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return 0;
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}
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static const struct seq_operations service_level_seq_ops = {
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.start = service_level_start,
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.next = service_level_next,
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.stop = service_level_stop,
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.show = service_level_show
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};
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static int service_level_open(struct inode *inode, struct file *file)
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{
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return seq_open(file, &service_level_seq_ops);
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}
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static const struct file_operations service_level_ops = {
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.open = service_level_open,
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.read = seq_read,
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.llseek = seq_lseek,
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.release = seq_release
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};
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static void service_level_vm_print(struct seq_file *m,
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struct service_level *slr)
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{
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char *query_buffer, *str;
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query_buffer = kmalloc(1024, GFP_KERNEL | GFP_DMA);
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if (!query_buffer)
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return;
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cpcmd("QUERY CPLEVEL", query_buffer, 1024, NULL);
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str = strchr(query_buffer, '\n');
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if (str)
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*str = 0;
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seq_printf(m, "VM: %s\n", query_buffer);
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kfree(query_buffer);
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}
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static struct service_level service_level_vm = {
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.seq_print = service_level_vm_print
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};
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static __init int create_proc_service_level(void)
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{
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proc_create("service_levels", 0, NULL, &service_level_ops);
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if (MACHINE_IS_VM)
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register_service_level(&service_level_vm);
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return 0;
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}
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subsys_initcall(create_proc_service_level);
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/*
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* CPU capability might have changed. Therefore recalculate loops_per_jiffy.
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*/
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void s390_adjust_jiffies(void)
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{
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struct sysinfo_1_2_2 *info;
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const unsigned int fmil = 0x4b189680; /* 1e7 as 32-bit float. */
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FP_DECL_S(SA); FP_DECL_S(SB); FP_DECL_S(SR);
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FP_DECL_EX;
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unsigned int capability;
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info = (void *) get_zeroed_page(GFP_KERNEL);
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if (!info)
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return;
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if (stsi(info, 1, 2, 2) == 0) {
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/*
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* Major sigh. The cpu capability encoding is "special".
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* If the first 9 bits of info->capability are 0 then it
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* is a 32 bit unsigned integer in the range 0 .. 2^23.
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* If the first 9 bits are != 0 then it is a 32 bit float.
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* In addition a lower value indicates a proportionally
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* higher cpu capacity. Bogomips are the other way round.
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* To get to a halfway suitable number we divide 1e7
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* by the cpu capability number. Yes, that means a floating
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* point division .. math-emu here we come :-)
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*/
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FP_UNPACK_SP(SA, &fmil);
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if ((info->capability >> 23) == 0)
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FP_FROM_INT_S(SB, (long) info->capability, 64, long);
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else
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FP_UNPACK_SP(SB, &info->capability);
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FP_DIV_S(SR, SA, SB);
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FP_TO_INT_S(capability, SR, 32, 0);
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} else
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/*
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* Really old machine without stsi block for basic
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* cpu information. Report 42.0 bogomips.
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*/
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capability = 42;
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loops_per_jiffy = capability * (500000/HZ);
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free_page((unsigned long) info);
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}
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/*
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* calibrate the delay loop
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*/
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void calibrate_delay(void)
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{
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s390_adjust_jiffies();
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/* Print the good old Bogomips line .. */
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printk(KERN_DEBUG "Calibrating delay loop (skipped)... "
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"%lu.%02lu BogoMIPS preset\n", loops_per_jiffy/(500000/HZ),
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(loops_per_jiffy/(5000/HZ)) % 100);
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}
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