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-rw-r--r--arch/powerpc/platforms/pseries/Makefile1
-rw-r--r--arch/powerpc/platforms/pseries/hvCall.S72
-rw-r--r--arch/powerpc/platforms/pseries/hvCall_inst.c129
3 files changed, 202 insertions, 0 deletions
diff --git a/arch/powerpc/platforms/pseries/Makefile b/arch/powerpc/platforms/pseries/Makefile
index e5e0ff466904..997243a91be8 100644
--- a/arch/powerpc/platforms/pseries/Makefile
+++ b/arch/powerpc/platforms/pseries/Makefile
@@ -12,3 +12,4 @@ obj-$(CONFIG_EEH) += eeh.o eeh_cache.o eeh_driver.o eeh_event.o
12 12
13obj-$(CONFIG_HVC_CONSOLE) += hvconsole.o 13obj-$(CONFIG_HVC_CONSOLE) += hvconsole.o
14obj-$(CONFIG_HVCS) += hvcserver.o 14obj-$(CONFIG_HVCS) += hvcserver.o
15obj-$(CONFIG_HCALL_STATS) += hvCall_inst.o
diff --git a/arch/powerpc/platforms/pseries/hvCall.S b/arch/powerpc/platforms/pseries/hvCall.S
index 9a99b056bd27..c00cfed7af2c 100644
--- a/arch/powerpc/platforms/pseries/hvCall.S
+++ b/arch/powerpc/platforms/pseries/hvCall.S
@@ -10,9 +10,69 @@
10#include <asm/hvcall.h> 10#include <asm/hvcall.h>
11#include <asm/processor.h> 11#include <asm/processor.h>
12#include <asm/ppc_asm.h> 12#include <asm/ppc_asm.h>
13#include <asm/asm-offsets.h>
13 14
14#define STK_PARM(i) (48 + ((i)-3)*8) 15#define STK_PARM(i) (48 + ((i)-3)*8)
15 16
17#ifdef CONFIG_HCALL_STATS
18/*
19 * precall must preserve all registers. use unused STK_PARM()
20 * areas to save snapshots and opcode.
21 */
22#define HCALL_INST_PRECALL \
23 std r3,STK_PARM(r3)(r1); /* save opcode */ \
24 mftb r0; /* get timebase and */ \
25 std r0,STK_PARM(r5)(r1); /* save for later */ \
26BEGIN_FTR_SECTION; \
27 mfspr r0,SPRN_PURR; /* get PURR and */ \
28 std r0,STK_PARM(r6)(r1); /* save for later */ \
29END_FTR_SECTION_IFCLR(CPU_FTR_PURR);
30
31/*
32 * postcall is performed immediately before function return which
33 * allows liberal use of volatile registers.
34 */
35#define HCALL_INST_POSTCALL \
36 ld r4,STK_PARM(r3)(r1); /* validate opcode */ \
37 cmpldi cr7,r4,MAX_HCALL_OPCODE; \
38 bgt- cr7,1f; \
39 \
40 /* get time and PURR snapshots after hcall */ \
41 mftb r7; /* timebase after */ \
42BEGIN_FTR_SECTION; \
43 mfspr r8,SPRN_PURR; /* PURR after */ \
44 ld r6,STK_PARM(r6)(r1); /* PURR before */ \
45 subf r6,r6,r8; /* delta */ \
46END_FTR_SECTION_IFCLR(CPU_FTR_PURR); \
47 ld r5,STK_PARM(r5)(r1); /* timebase before */ \
48 subf r5,r5,r7; /* time delta */ \
49 \
50 /* calculate address of stat structure r4 = opcode */ \
51 srdi r4,r4,2; /* index into array */ \
52 mulli r4,r4,HCALL_STAT_SIZE; \
53 LOAD_REG_ADDR(r7, per_cpu__hcall_stats); \
54 add r4,r4,r7; \
55 ld r7,PACA_DATA_OFFSET(r13); /* per cpu offset */ \
56 add r4,r4,r7; \
57 \
58 /* update stats */ \
59 ld r7,HCALL_STAT_CALLS(r4); /* count */ \
60 addi r7,r7,1; \
61 std r7,HCALL_STAT_CALLS(r4); \
62 ld r7,HCALL_STAT_TB(r4); /* timebase */ \
63 add r7,r7,r5; \
64 std r7,HCALL_STAT_TB(r4); \
65BEGIN_FTR_SECTION; \
66 ld r7,HCALL_STAT_PURR(r4); /* PURR */ \
67 add r7,r7,r6; \
68 std r7,HCALL_STAT_PURR(r4); \
69END_FTR_SECTION_IFCLR(CPU_FTR_PURR); \
701:
71#else
72#define HCALL_INST_PRECALL
73#define HCALL_INST_POSTCALL
74#endif
75
16 .text 76 .text
17 77
18_GLOBAL(plpar_hcall_norets) 78_GLOBAL(plpar_hcall_norets)
@@ -21,8 +81,12 @@ _GLOBAL(plpar_hcall_norets)
21 mfcr r0 81 mfcr r0
22 stw r0,8(r1) 82 stw r0,8(r1)
23 83
84 HCALL_INST_PRECALL
85
24 HVSC /* invoke the hypervisor */ 86 HVSC /* invoke the hypervisor */
25 87
88 HCALL_INST_POSTCALL
89
26 lwz r0,8(r1) 90 lwz r0,8(r1)
27 mtcrf 0xff,r0 91 mtcrf 0xff,r0
28 blr /* return r3 = status */ 92 blr /* return r3 = status */
@@ -33,6 +97,8 @@ _GLOBAL(plpar_hcall)
33 mfcr r0 97 mfcr r0
34 stw r0,8(r1) 98 stw r0,8(r1)
35 99
100 HCALL_INST_PRECALL
101
36 std r4,STK_PARM(r4)(r1) /* Save ret buffer */ 102 std r4,STK_PARM(r4)(r1) /* Save ret buffer */
37 103
38 mr r4,r5 104 mr r4,r5
@@ -50,6 +116,8 @@ _GLOBAL(plpar_hcall)
50 std r6, 16(r12) 116 std r6, 16(r12)
51 std r7, 24(r12) 117 std r7, 24(r12)
52 118
119 HCALL_INST_POSTCALL
120
53 lwz r0,8(r1) 121 lwz r0,8(r1)
54 mtcrf 0xff,r0 122 mtcrf 0xff,r0
55 123
@@ -61,6 +129,8 @@ _GLOBAL(plpar_hcall9)
61 mfcr r0 129 mfcr r0
62 stw r0,8(r1) 130 stw r0,8(r1)
63 131
132 HCALL_INST_PRECALL
133
64 std r4,STK_PARM(r4)(r1) /* Save ret buffer */ 134 std r4,STK_PARM(r4)(r1) /* Save ret buffer */
65 135
66 mr r4,r5 136 mr r4,r5
@@ -86,6 +156,8 @@ _GLOBAL(plpar_hcall9)
86 std r11,56(r12) 156 std r11,56(r12)
87 std r12,64(r12) 157 std r12,64(r12)
88 158
159 HCALL_INST_POSTCALL
160
89 lwz r0,8(r1) 161 lwz r0,8(r1)
90 mtcrf 0xff,r0 162 mtcrf 0xff,r0
91 163
diff --git a/arch/powerpc/platforms/pseries/hvCall_inst.c b/arch/powerpc/platforms/pseries/hvCall_inst.c
new file mode 100644
index 000000000000..641e6511cf06
--- /dev/null
+++ b/arch/powerpc/platforms/pseries/hvCall_inst.c
@@ -0,0 +1,129 @@
1/*
2 * Copyright (C) 2006 Mike Kravetz IBM Corporation
3 *
4 * Hypervisor Call Instrumentation
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
10 *
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
15 *
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software
18 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
19 */
20
21#include <linux/kernel.h>
22#include <linux/percpu.h>
23#include <linux/debugfs.h>
24#include <linux/seq_file.h>
25#include <linux/cpumask.h>
26#include <asm/hvcall.h>
27#include <asm/firmware.h>
28#include <asm/cputable.h>
29
30DEFINE_PER_CPU(struct hcall_stats[HCALL_STAT_ARRAY_SIZE], hcall_stats);
31
32/*
33 * Routines for displaying the statistics in debugfs
34 */
35static void *hc_start(struct seq_file *m, loff_t *pos)
36{
37 if ((int)*pos < HCALL_STAT_ARRAY_SIZE)
38 return (void *)(unsigned long)(*pos + 1);
39
40 return NULL;
41}
42
43static void *hc_next(struct seq_file *m, void *p, loff_t * pos)
44{
45 ++*pos;
46
47 return hc_start(m, pos);
48}
49
50static void hc_stop(struct seq_file *m, void *p)
51{
52}
53
54static int hc_show(struct seq_file *m, void *p)
55{
56 unsigned long h_num = (unsigned long)p;
57 struct hcall_stats *hs = (struct hcall_stats *)m->private;
58
59 if (hs[h_num].num_calls) {
60 if (!cpu_has_feature(CPU_FTR_PURR))
61 seq_printf(m, "%lu %lu %lu %lu\n", h_num<<2,
62 hs[h_num].num_calls,
63 hs[h_num].tb_total,
64 hs[h_num].purr_total);
65 else
66 seq_printf(m, "%lu %lu %lu\n", h_num<<2,
67 hs[h_num].num_calls,
68 hs[h_num].tb_total);
69 }
70
71 return 0;
72}
73
74static struct seq_operations hcall_inst_seq_ops = {
75 .start = hc_start,
76 .next = hc_next,
77 .stop = hc_stop,
78 .show = hc_show
79};
80
81static int hcall_inst_seq_open(struct inode *inode, struct file *file)
82{
83 int rc;
84 struct seq_file *seq;
85
86 rc = seq_open(file, &hcall_inst_seq_ops);
87 seq = file->private_data;
88 seq->private = file->f_dentry->d_inode->u.generic_ip;
89
90 return rc;
91}
92
93static struct file_operations hcall_inst_seq_fops = {
94 .open = hcall_inst_seq_open,
95 .read = seq_read,
96 .llseek = seq_lseek,
97 .release = seq_release,
98};
99
100#define HCALL_ROOT_DIR "hcall_inst"
101#define CPU_NAME_BUF_SIZE 32
102
103static int __init hcall_inst_init(void)
104{
105 struct dentry *hcall_root;
106 struct dentry *hcall_file;
107 char cpu_name_buf[CPU_NAME_BUF_SIZE];
108 int cpu;
109
110 if (!firmware_has_feature(FW_FEATURE_LPAR))
111 return 0;
112
113 hcall_root = debugfs_create_dir(HCALL_ROOT_DIR, NULL);
114 if (!hcall_root)
115 return -ENOMEM;
116
117 for_each_possible_cpu(cpu) {
118 snprintf(cpu_name_buf, CPU_NAME_BUF_SIZE, "cpu%d", cpu);
119 hcall_file = debugfs_create_file(cpu_name_buf, S_IRUGO,
120 hcall_root,
121 per_cpu(hcall_stats, cpu),
122 &hcall_inst_seq_fops);
123 if (!hcall_file)
124 return -ENOMEM;
125 }
126
127 return 0;
128}
129__initcall(hcall_inst_init);
generated by cgit v1.2.2 (git 2.25.0) at 2025-02-05 13:31:59 -0500