ref: 53d55013598d7cd214d01cbf0b026844fe7ca8d2
dir: /sys/src/cmd/aux/cpuid.c/
#include <u.h>
#include <libc.h>
#include <bio.h>
#define CUT(x, a, b) (((x)&((1<<((b)+1))-1))>>(a))
typedef struct Res {
ulong ax, bx, cx, dx;
} Res;
Biobuf *out;
uchar _cpuid[] = {
0x5E, /* POP SI (PC) */
0x5D, /* POP BP (Res&) */
0x58, /* POP AX */
0x59, /* POP CX */
0x51, /* PUSH CX */
0x50, /* PUSH AX */
0x55, /* PUSH BP */
0x56, /* PUSH SI */
0x31, 0xDB, /* XOR BX, BX */
0x31, 0xD2, /* XOR DX, DX */
0x0F, 0xA2, /* CPUID */
0x89, 0x45, 0x00, /* MOV AX, 0(BP) */
0x89, 0x5d, 0x04, /* MOV BX, 4(BP) */
0x89, 0x4d, 0x08, /* MOV CX, 8(BP) */
0x89, 0x55, 0x0C, /* MOV DX, 12(BP) */
0xC3, /* RET */
};
Res (*cpuid)(ulong ax, ulong cx) = (Res(*)(ulong, ulong)) _cpuid;
void
func0(ulong)
{
Res r;
char buf[13];
r = cpuid(0, 0);
((ulong *) buf)[0] = r.bx;
((ulong *) buf)[1] = r.dx;
((ulong *) buf)[2] = r.cx;
buf[12] = 0;
Bprint(out, "vendor %s\n", buf);
}
void
printbits(char *id, ulong x, char **s)
{
int i, j;
for(i = 0, j = 0; i < 32; i++)
if((x & (1<<i)) != 0 && s[i] != nil){
if(j++ % 16 == 0){
if(j != 1)
Bprint(out, "\n");
Bprint(out, "%s ", id);
}
Bprint(out, "%s ", s[i]);
}
if(j != 0)
Bprint(out, "\n");
}
void
func1(ulong)
{
Res r;
int family, model;
static char *bitsdx[32] = {
[0] "fpu", "vme", "de", "pse",
[4] "tsc", "msr", "pae", "mce",
[8] "cx8", "apic", nil, "sep",
[12] "mtrr", "pge", "mca", "cmov",
[16] "pat", "pse36", "pn", "clflush",
[20] nil, "dts", "acpi", "mmx",
[24] "fxsr", "sse", "sse2", "ss",
[28] "ht", "tm", "ia64", "pbe",
};
static char *bitscx[32] = {
[0] "pni", "pclmulqdq", "dtes64", "monitor",
[4] "ds_cpl", "vmx", "smx", "est",
[8] "tm2", "ssse3", "cid", nil,
[12] "fma", "cx16", "xtpr", "pdcm",
[16] nil, "pcid", "dca", "sse4_1",
[20] "sse4_2", "x2apic", "movbe", "popcnt",
[24] "tscdeadline", "aes", "xsave", "osxsave",
[28] "avx", "f16c", "rdrnd", "hypervisor",
};
r = cpuid(1, 0);
Bprint(out, "procmodel %.8ulx / %.8ulx\n", r.ax, r.bx);
family = r.ax >> 8 & 0xf;
model = r.ax >> 8 & 0xf;
if(family == 15)
family += r.ax >> 20 & 0xff;
if(family == 6 || family == 15)
model += r.ax >> 12 & 0xf0;
Bprint(out, "typefammod %.1x %.2x %.3x %.1x\n", (int)(r.ax >> 12 & 3), family, model, (int)(r.ax & 0xf));
printbits("features", r.dx, bitsdx);
printbits("features", r.cx, bitscx);
}
void
func7(ulong)
{
Res r;
static char *bitebx[32] = {
[0] "fsgsbase", nil, "sgx", "bmi1",
[4] "hle", "avx2", nil, "smep",
[8] "bmi2", "erms", "invpcid", "rtm",
[12] "pqm", nil, "mpx", "pqe",
[16] "avx512", "avx512dq", "rdseed", "adx",
[20] "smap", "avx512ifma", "pcommit", "clflushopt",
[24] "clwb", "intelpt", "avx512pf", "avx512er",
[28] "avx512cd", "sha", "avx512bw", "avx512vl",
};
static char *bitecx[32] = {
[0] "prefetchwt1", "avx512vbmi", "umip", "pku",
[4] "ospke", "waitpkg", "avx512vbmi2", "cetss",
[8] "gfni", "vaes", "vpclmulqdq", "avx512vnni",
[12] "avx512bitalg", nil, "avx512vpopcntdq", nil,
[16] nil, nil, nil, nil,
[20] nil, nil, "rdpid", nil,
[24] nil, "cldemote", nil, "movdiri",
[28] "movdir64b", "enqcmd", "sgxlc", "pks",
};
static char *bitedx[32] = {
[0] nil, nil, "avx512vnniw4", "avx512fmaps4",
[4] "fsrm", nil, nil, nil,
[8] "avx512vp2i", nil, nil, nil,
};
static char *biteax[32] = {
[0] nil, nil, nil, nil,
[4] nil, "avx512bf16", nil, nil,
};
r = cpuid(7, 0);
printbits("features", r.bx, bitebx);
printbits("features", r.cx, bitecx);
printbits("features", r.dx, bitedx);
r = cpuid(7, 1);
printbits("features", r.ax, biteax);
}
void
func13(ulong)
{
Res r;
static char *bitsax[32] = {
[0] "xsaveopt", "xsavec", "xgetbv1", "xsaves",
};
r = cpuid(13, 1);
printbits("features", r.ax, bitsax);
}
void
extfunc1(ulong ax)
{
Res r;
static char *bitsdx[32] = {
[0] "fpu", "vme", "de", "pse",
[4] "tsc", "msr", "pae", "mce",
[8] "cx8", "apic", nil, "syscall",
[12] "mtrr", "pge", "mca", "cmov",
[16] "pat", "pse36", nil, "mp",
[20] "nx", nil, "mmx+", "mmx",
[24] "fxsr", "ffxsr", "pg1g", "tscp",
[28] nil, "lm", "3dnow!+", "3dnow!",
};
static char *bitscx[32] = {
[0] "ahf64", "cmp", "svm", "eas",
[4] "cr8d", "lzcnt", "sse4a", "msse",
[8] "3dnow!p", "osvw", "ibs", "xop",
[12] "skinit", "wdt", nil, "lwp",
[16] "fma4", "tce", nil, "nodeid",
[20] nil, "tbm", "topx", "pcx_core",
[24] "pcx_nb", nil, nil, nil,
[28] nil, nil, nil, nil,
};
r = cpuid(ax, 0);
Bprint(out, "extmodel %.8ulx / %.8ulx\n", r.ax, r.bx);
printbits("extfeatures", r.dx, bitsdx);
printbits("extfeatures", r.cx, bitscx);
}
void
extfunc2(ulong ax)
{
char buf[49];
int i;
Res r;
char *p;
if(ax != 0x80000004)
return;
buf[48] = 0;
for(i = 0; i < 3; i++){
r = cpuid(0x80000002 + i, 0);
((ulong *) buf)[4 * i + 0] = r.ax;
((ulong *) buf)[4 * i + 1] = r.bx;
((ulong *) buf)[4 * i + 2] = r.cx;
((ulong *) buf)[4 * i + 3] = r.dx;
}
p = buf;
while(*p == ' ')
p++;
Bprint(out, "procname %s\n", p);
}
void
extfunc8(ulong ax)
{
Res r;
r = cpuid(ax, 0);
Bprint(out, "physbits %uld\n", CUT(r.ax, 0, 7));
Bprint(out, "virtbits %uld\n", CUT(r.ax, 8, 15));
if(CUT(r.ax, 16, 23) != 0)
Bprint(out, "guestbits %uld\n", CUT(r.ax, 16, 23));
}
void (*funcs[])(ulong) = {
[0] func0,
[1] func1,
[7] func7,
[13] func13,
};
void (*extfuncs[])(ulong) = {
[1] extfunc1,
[2] extfunc2,
[3] extfunc2,
[4] extfunc2,
[8] extfunc8,
};
void
stdfunc(ulong ax)
{
Res r;
r = cpuid(ax, 0);
Bprint(out, "%.8ulx %.8ulx %.8ulx %.8ulx %.8ulx\n", ax, r.ax, r.bx, r.cx, r.dx);
}
char Egreg[] = "this information is classified";
void
notehand(void *, char *s)
{
if(strncmp(s, "sys:", 4) == 0)
sysfatal(Egreg);
noted(NDFLT);
}
void
main(int argc, char **argv)
{
Res r;
int i, rflag, aflag;
ulong w;
static Biobuf buf;
rflag = aflag = 0;
ARGBEGIN {
case 'r': rflag++; break;
case 'a': aflag++; break;
} ARGEND;
notify(notehand);
/* first long in a.out header */
w = *(ulong *)(((uintptr)main)&~0xfff);
notify(nil);
switch(w){
default:
sysfatal(Egreg);
case 0x978a0000: /* amd64 */
/* patch out POP BP -> POP AX */
_cpuid[1] = 0x58;
case 0xeb010000: /* 386 */
break;
}
segflush(_cpuid, sizeof(_cpuid));
Binit(&buf, 1, OWRITE);
out = &buf;
r = cpuid(0, 0);
for(i = 0; i <= r.ax; i++)
if(i >= nelem(funcs) || funcs[i] == nil || rflag){
if(rflag || aflag)
stdfunc(i);
}else
funcs[i](i);
r = cpuid(0x80000000, 0);
if(r.ax < 0x80000000)
exits(nil);
r.ax -= 0x80000000;
for(i = 0; i <= r.ax; i++)
if(i >= nelem(extfuncs) || extfuncs[i] == nil || rflag){
if(rflag || aflag)
stdfunc(0x80000000 | i);
}else
extfuncs[i](0x80000000 | i);
exits(nil);
}