* [PATCH 2.6.7-mm2] New procfs feature : cpuflags
@ 2004-06-26 12:26 "Fabian LoneStar Frédérick"
0 siblings, 0 replies; only message in thread
From: "Fabian LoneStar Frédérick" @ 2004-06-26 12:26 UTC (permalink / raw)
To: linux-kernel
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Hi,
This patch displays x86 flags in /proc/cpuflags :
e.g.
flag1 :yes
flag2 :no
flagx :yes
...
PS:It works on x86 evaluating first processor flags (generic?).
PS2:Why ? current cpuinfo displays all _available_ flags only and in queue
mode.
Regards,
FabF
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diff -Naur orig~cpuflags/arch/i386/kernel/cpu/proc.c edited~cpuflags/arch/i386/kernel/cpu/proc.c
--- orig~cpuflags/arch/i386/kernel/cpu/proc.c 2004-06-25 00:52:24.000000000 +0200
+++ edited~cpuflags/arch/i386/kernel/cpu/proc.c 2004-06-26 14:11:31.000000000 +0200
@@ -4,57 +4,57 @@
#include <asm/semaphore.h>
#include <linux/seq_file.h>
+/*
+ * These flag bits must match the definitions in <asm/cpufeature.h>.
+ * NULL means this bit is undefined or reserved; either way it doesn't
+ * have meaning as far as Linux is concerned. Note that it's important
+ * to realize there is a difference between this table and CPUID -- if
+ * applications want to get the raw CPUID data, they should access
+ * /dev/cpu/<cpu_nr>/cpuid instead.
+ */
+static char *x86_cap_flags[] = {
+ /* Intel-defined */
+ "fpu", "vme", "de", "pse", "tsc", "msr", "pae", "mce",
+ "cx8", "apic", NULL, "sep", "mtrr", "pge", "mca", "cmov",
+ "pat", "pse36", "pn", "clflush", NULL, "dts", "acpi", "mmx",
+ "fxsr", "sse", "sse2", "ss", "ht", "tm", "ia64", "pbe",
+
+ /* AMD-defined */
+ NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
+ NULL, NULL, NULL, "syscall", NULL, NULL, NULL, NULL,
+ NULL, NULL, NULL, "mp", "nx", NULL, "mmxext", NULL,
+ NULL, NULL, NULL, NULL, NULL, "lm", "3dnowext", "3dnow",
+
+ /* Transmeta-defined */
+ "recovery", "longrun", NULL, "lrti", NULL, NULL, NULL, NULL,
+ NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
+ NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
+ NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
+
+ /* Other (Linux-defined) */
+ "cxmmx", "k6_mtrr", "cyrix_arr", "centaur_mcr",
+ NULL, NULL, NULL, NULL,
+ NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
+ NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
+ NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
+
+ /* Intel-defined (#2) */
+ "pni", NULL, NULL, "monitor", "ds_cpl", NULL, NULL, "tm2",
+ "est", NULL, "cid", NULL, NULL, NULL, NULL, NULL,
+ NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
+ NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
+
+ /* VIA/Cyrix/Centaur-defined */
+ NULL, NULL, "rng", "rng_en", NULL, NULL, "ace", "ace_en",
+ NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
+ NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
+ NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
+};
/*
* Get CPU information for use by the procfs.
*/
static int show_cpuinfo(struct seq_file *m, void *v)
{
- /*
- * These flag bits must match the definitions in <asm/cpufeature.h>.
- * NULL means this bit is undefined or reserved; either way it doesn't
- * have meaning as far as Linux is concerned. Note that it's important
- * to realize there is a difference between this table and CPUID -- if
- * applications want to get the raw CPUID data, they should access
- * /dev/cpu/<cpu_nr>/cpuid instead.
- */
- static char *x86_cap_flags[] = {
- /* Intel-defined */
- "fpu", "vme", "de", "pse", "tsc", "msr", "pae", "mce",
- "cx8", "apic", NULL, "sep", "mtrr", "pge", "mca", "cmov",
- "pat", "pse36", "pn", "clflush", NULL, "dts", "acpi", "mmx",
- "fxsr", "sse", "sse2", "ss", "ht", "tm", "ia64", "pbe",
-
- /* AMD-defined */
- NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
- NULL, NULL, NULL, "syscall", NULL, NULL, NULL, NULL,
- NULL, NULL, NULL, "mp", "nx", NULL, "mmxext", NULL,
- NULL, NULL, NULL, NULL, NULL, "lm", "3dnowext", "3dnow",
-
- /* Transmeta-defined */
- "recovery", "longrun", NULL, "lrti", NULL, NULL, NULL, NULL,
- NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
- NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
- NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
-
- /* Other (Linux-defined) */
- "cxmmx", "k6_mtrr", "cyrix_arr", "centaur_mcr",
- NULL, NULL, NULL, NULL,
- NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
- NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
- NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
-
- /* Intel-defined (#2) */
- "pni", NULL, NULL, "monitor", "ds_cpl", NULL, NULL, "tm2",
- "est", NULL, "cid", NULL, NULL, NULL, NULL, NULL,
- NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
- NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
-
- /* VIA/Cyrix/Centaur-defined */
- NULL, NULL, "rng", "rng_en", NULL, NULL, "ace", "ace_en",
- NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
- NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
- NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
- };
struct cpuinfo_x86 *c = v;
int i, n = c - cpu_data;
int fpu_exception;
@@ -144,3 +144,15 @@
.stop = c_stop,
.show = show_cpuinfo,
};
+int show_cpuflags(char *page)
+{
+ int i,len=0;
+ for ( i = 0 ; i < 32*NCAPINTS ; i++ )
+ if ( x86_cap_flags[i] != NULL ){
+ len+=sprintf(page+len, " %s\t: ", x86_cap_flags[i]);
+ if ( test_bit(i, cpu_data[0].x86_capability) )
+ len+=sprintf(page+len, "yes\n");
+ else len+=sprintf(page+len, "no\n");
+ }
+ return len;
+}
diff -Naur orig~cpuflags/fs/proc/proc_misc.c edited~cpuflags/fs/proc/proc_misc.c
--- orig~cpuflags/fs/proc/proc_misc.c 2004-06-25 00:53:20.000000000 +0200
+++ edited~cpuflags/fs/proc/proc_misc.c 2004-06-26 13:54:22.000000000 +0200
@@ -66,6 +66,7 @@
extern int get_exec_domain_list(char *);
extern int get_dma_list(char *);
extern int get_locks_status (char *, char **, off_t, int);
+extern int show_cpuflags (char *);
static int proc_calc_metrics(char *page, char **start, off_t off,
int count, int *eof, int len)
@@ -149,6 +150,18 @@
return proc_calc_metrics(page, start, off, count, eof, len);
}
+static int cpuflags_read_proc(char *page, char **start, off_t off,
+ int count, int *eof, void *data)
+{
+ int len;
+#ifdef CONFIG_X86
+ len=show_cpuflags(page);
+ return proc_calc_metrics(page, start, off, count, eof, len);
+#endif
+ return 0;
+
+}
+
static int meminfo_read_proc(char *page, char **start, off_t off,
int count, int *eof, void *data)
{
@@ -677,6 +690,7 @@
{"loadavg", loadavg_read_proc},
{"uptime", uptime_read_proc},
{"meminfo", meminfo_read_proc},
+ {"cpuflags", cpuflags_read_proc},
{"version", version_read_proc},
#ifdef CONFIG_PROC_HARDWARE
{"hardware", hardware_read_proc},
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