d/freebsd-nq
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity
freebsd-nq/sys/amd64/amd64/identcpu.c
John Baldwin 355d8a2f91 Add definitions for more structured extended features as well as 
XSAVE Extended Features for AVX512 and MPX (Memory Protection Extensions).

Obtained from:	Intel's Instruction Set Extensions Programming Reference
                (March 2014)
2014-05-16 17:45:09 +00:00

725 lines
20 KiB
C
Raw Blame History

/*-
* Copyright (c) 1992 Terrence R. Lambert.
* Copyright (c) 1982, 1987, 1990 The Regents of the University of California.
* Copyright (c) 1997 KATO Takenori.
* All rights reserved.
*
* This code is derived from software contributed to Berkeley by
* William Jolitz.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Berkeley and its contributors.
* 4. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* from: Id: machdep.c,v 1.193 1996/06/18 01:22:04 bde Exp
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include "opt_cpu.h"
#include <sys/param.h>
#include <sys/bus.h>
#include <sys/cpu.h>
#include <sys/eventhandler.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/sysctl.h>
#include <sys/power.h>
#include <machine/asmacros.h>
#include <machine/clock.h>
#include <machine/cputypes.h>
#include <machine/frame.h>
#include <machine/intr_machdep.h>
#include <machine/segments.h>
#include <machine/specialreg.h>
#include <machine/md_var.h>
#include <x86/isa/icu.h>
/* XXX - should be in header file: */
void printcpuinfo(void);
void identify_cpu(void);
void earlysetcpuclass(void);
void panicifcpuunsupported(void);
static u_int find_cpu_vendor_id(void);
static void print_AMD_info(void);
static void print_AMD_assoc(int i);
static void print_via_padlock_info(void);
int cpu_class;
char machine[] = "amd64";
#ifdef SCTL_MASK32
extern int adaptive_machine_arch;
#endif
static int
sysctl_hw_machine(SYSCTL_HANDLER_ARGS)
{
#ifdef SCTL_MASK32
static const char machine32[] = "i386";
#endif
int error;
#ifdef SCTL_MASK32
if ((req->flags & SCTL_MASK32) != 0 && adaptive_machine_arch)
error = SYSCTL_OUT(req, machine32, sizeof(machine32));
else
#endif
error = SYSCTL_OUT(req, machine, sizeof(machine));
return (error);
}
SYSCTL_PROC(_hw, HW_MACHINE, machine, CTLTYPE_STRING | CTLFLAG_RD,
NULL, 0, sysctl_hw_machine, "A", "Machine class");
static char cpu_model[128];
SYSCTL_STRING(_hw, HW_MODEL, model, CTLFLAG_RD,
cpu_model, 0, "Machine model");
static int hw_clockrate;
SYSCTL_INT(_hw, OID_AUTO, clockrate, CTLFLAG_RD,
&hw_clockrate, 0, "CPU instruction clock rate");
static eventhandler_tag tsc_post_tag;
static char cpu_brand[48];
static struct {
char *cpu_name;
int cpu_class;
} amd64_cpus[] = {
{ "Clawhammer", CPUCLASS_K8 }, /* CPU_CLAWHAMMER */
{ "Sledgehammer", CPUCLASS_K8 }, /* CPU_SLEDGEHAMMER */
};
static struct {
char *vendor;
u_int vendor_id;
} cpu_vendors[] = {
{ INTEL_VENDOR_ID, CPU_VENDOR_INTEL }, /* GenuineIntel */
{ AMD_VENDOR_ID, CPU_VENDOR_AMD }, /* AuthenticAMD */
{ CENTAUR_VENDOR_ID, CPU_VENDOR_CENTAUR }, /* CentaurHauls */
};
void
printcpuinfo(void)
{
u_int regs[4], i;
char *brand;
cpu_class = amd64_cpus[cpu].cpu_class;
printf("CPU: ");
strncpy(cpu_model, amd64_cpus[cpu].cpu_name, sizeof (cpu_model));
/* Check for extended CPUID information and a processor name. */
if (cpu_exthigh >= 0x80000004) {
brand = cpu_brand;
for (i = 0x80000002; i < 0x80000005; i++) {
do_cpuid(i, regs);
memcpy(brand, regs, sizeof(regs));
brand += sizeof(regs);
}
}
switch (cpu_vendor_id) {
case CPU_VENDOR_INTEL:
/* Please make up your mind folks! */
strcat(cpu_model, "EM64T");
break;
case CPU_VENDOR_AMD:
/*
* Values taken from AMD Processor Recognition
* http://www.amd.com/K6/k6docs/pdf/20734g.pdf
* (also describes ``Features'' encodings.
*/
strcpy(cpu_model, "AMD ");
if ((cpu_id & 0xf00) == 0xf00)
strcat(cpu_model, "AMD64 Processor");
else
strcat(cpu_model, "Unknown");
break;
case CPU_VENDOR_CENTAUR:
strcpy(cpu_model, "VIA ");
if ((cpu_id & 0xff0) == 0x6f0)
strcat(cpu_model, "Nano Processor");
else
strcat(cpu_model, "Unknown");
break;
default:
strcat(cpu_model, "Unknown");
break;
}
/*
* Replace cpu_model with cpu_brand minus leading spaces if
* we have one.
*/
brand = cpu_brand;
while (*brand == ' ')
++brand;
if (*brand != '\0')
strcpy(cpu_model, brand);
printf("%s (", cpu_model);
switch(cpu_class) {
case CPUCLASS_K8:
if (tsc_freq != 0) {
hw_clockrate = (tsc_freq + 5000) / 1000000;
printf("%jd.%02d-MHz ",
(intmax_t)(tsc_freq + 4999) / 1000000,
(u_int)((tsc_freq + 4999) / 10000) % 100);
}
printf("K8");
break;
default:
printf("Unknown"); /* will panic below... */
}
printf("-class CPU)\n");
if (*cpu_vendor)
printf(" Origin=\"%s\"", cpu_vendor);
if (cpu_id)
printf(" Id=0x%x", cpu_id);
if (cpu_vendor_id == CPU_VENDOR_INTEL ||
cpu_vendor_id == CPU_VENDOR_AMD ||
cpu_vendor_id == CPU_VENDOR_CENTAUR) {
printf(" Family=0x%x", CPUID_TO_FAMILY(cpu_id));
printf(" Model=0x%x", CPUID_TO_MODEL(cpu_id));
printf(" Stepping=%u", cpu_id & CPUID_STEPPING);
/*
* AMD CPUID Specification
* http://support.amd.com/us/Embedded_TechDocs/25481.pdf
*
* Intel Processor Identification and CPUID Instruction
* http://www.intel.com/assets/pdf/appnote/241618.pdf
*/
if (cpu_high > 0) {
/*
* Here we should probably set up flags indicating
* whether or not various features are available.
* The interesting ones are probably VME, PSE, PAE,
* and PGE. The code already assumes without bothering
* to check that all CPUs >= Pentium have a TSC and
* MSRs.
*/
printf("\n Features=0x%b", cpu_feature,
"\020"
"\001FPU" /* Integral FPU */
"\002VME" /* Extended VM86 mode support */
"\003DE" /* Debugging Extensions (CR4.DE) */
"\004PSE" /* 4MByte page tables */
"\005TSC" /* Timestamp counter */
"\006MSR" /* Machine specific registers */
"\007PAE" /* Physical address extension */
"\010MCE" /* Machine Check support */
"\011CX8" /* CMPEXCH8 instruction */
"\012APIC" /* SMP local APIC */
"\013oldMTRR" /* Previous implementation of MTRR */
"\014SEP" /* Fast System Call */
"\015MTRR" /* Memory Type Range Registers */
"\016PGE" /* PG_G (global bit) support */
"\017MCA" /* Machine Check Architecture */
"\020CMOV" /* CMOV instruction */
"\021PAT" /* Page attributes table */
"\022PSE36" /* 36 bit address space support */
"\023PN" /* Processor Serial number */
"\024CLFLUSH" /* Has the CLFLUSH instruction */
"\025<b20>"
"\026DTS" /* Debug Trace Store */
"\027ACPI" /* ACPI support */
"\030MMX" /* MMX instructions */
"\031FXSR" /* FXSAVE/FXRSTOR */
"\032SSE" /* Streaming SIMD Extensions */
"\033SSE2" /* Streaming SIMD Extensions #2 */
"\034SS" /* Self snoop */
"\035HTT" /* Hyperthreading (see EBX bit 16-23) */
"\036TM" /* Thermal Monitor clock slowdown */
"\037IA64" /* CPU can execute IA64 instructions */
"\040PBE" /* Pending Break Enable */
);
if (cpu_feature2 != 0) {
printf("\n Features2=0x%b", cpu_feature2,
"\020"
"\001SSE3" /* SSE3 */
"\002PCLMULQDQ" /* Carry-Less Mul Quadword */
"\003DTES64" /* 64-bit Debug Trace */
"\004MON" /* MONITOR/MWAIT Instructions */
"\005DS_CPL" /* CPL Qualified Debug Store */
"\006VMX" /* Virtual Machine Extensions */
"\007SMX" /* Safer Mode Extensions */
"\010EST" /* Enhanced SpeedStep */
"\011TM2" /* Thermal Monitor 2 */
"\012SSSE3" /* SSSE3 */
"\013CNXT-ID" /* L1 context ID available */
"\014<b11>"
"\015FMA" /* Fused Multiply Add */
"\016CX16" /* CMPXCHG16B Instruction */
"\017xTPR" /* Send Task Priority Messages*/
"\020PDCM" /* Perf/Debug Capability MSR */
"\021<b16>"
"\022PCID" /* Process-context Identifiers*/
"\023DCA" /* Direct Cache Access */
"\024SSE4.1" /* SSE 4.1 */
"\025SSE4.2" /* SSE 4.2 */
"\026x2APIC" /* xAPIC Extensions */
"\027MOVBE" /* MOVBE Instruction */
"\030POPCNT" /* POPCNT Instruction */
"\031TSCDLT" /* TSC-Deadline Timer */
"\032AESNI" /* AES Crypto */
"\033XSAVE" /* XSAVE/XRSTOR States */
"\034OSXSAVE" /* OS-Enabled State Management*/
"\035AVX" /* Advanced Vector Extensions */
"\036F16C" /* Half-precision conversions */
"\037RDRAND" /* RDRAND Instruction */
"\040HV" /* Hypervisor */
);
}
if (amd_feature != 0) {
printf("\n AMD Features=0x%b", amd_feature,
"\020" /* in hex */
"\001<s0>" /* Same */
"\002<s1>" /* Same */
"\003<s2>" /* Same */
"\004<s3>" /* Same */
"\005<s4>" /* Same */
"\006<s5>" /* Same */
"\007<s6>" /* Same */
"\010<s7>" /* Same */
"\011<s8>" /* Same */
"\012<s9>" /* Same */
"\013<b10>" /* Undefined */
"\014SYSCALL" /* Have SYSCALL/SYSRET */
"\015<s12>" /* Same */
"\016<s13>" /* Same */
"\017<s14>" /* Same */
"\020<s15>" /* Same */
"\021<s16>" /* Same */
"\022<s17>" /* Same */
"\023<b18>" /* Reserved, unknown */
"\024MP" /* Multiprocessor Capable */
"\025NX" /* Has EFER.NXE, NX */
"\026<b21>" /* Undefined */
"\027MMX+" /* AMD MMX Extensions */
"\030<s23>" /* Same */
"\031<s24>" /* Same */
"\032FFXSR" /* Fast FXSAVE/FXRSTOR */
"\033Page1GB" /* 1-GB large page support */
"\034RDTSCP" /* RDTSCP */
"\035<b28>" /* Undefined */
"\036LM" /* 64 bit long mode */
"\0373DNow!+" /* AMD 3DNow! Extensions */
"\0403DNow!" /* AMD 3DNow! */
);
}
if (amd_feature2 != 0) {
printf("\n AMD Features2=0x%b", amd_feature2,
"\020"
"\001LAHF" /* LAHF/SAHF in long mode */
"\002CMP" /* CMP legacy */
"\003SVM" /* Secure Virtual Mode */
"\004ExtAPIC" /* Extended APIC register */
"\005CR8" /* CR8 in legacy mode */
"\006ABM" /* LZCNT instruction */
"\007SSE4A" /* SSE4A */
"\010MAS" /* Misaligned SSE mode */
"\011Prefetch" /* 3DNow! Prefetch/PrefetchW */
"\012OSVW" /* OS visible workaround */
"\013IBS" /* Instruction based sampling */
"\014XOP" /* XOP extended instructions */
"\015SKINIT" /* SKINIT/STGI */
"\016WDT" /* Watchdog timer */
"\017<b14>"
"\020LWP" /* Lightweight Profiling */
"\021FMA4" /* 4-operand FMA instructions */
"\022TCE" /* Translation Cache Extension */
"\023<b18>"
"\024NodeId" /* NodeId MSR support */
"\025<b20>"
"\026TBM" /* Trailing Bit Manipulation */
"\027Topology" /* Topology Extensions */
"\030PCXC" /* Core perf count */
"\031PNXC" /* NB perf count */
"\032<b25>"
"\033DBE" /* Data Breakpoint extension */
"\034PTSC" /* Performance TSC */
"\035PL2I" /* L2I perf count */
"\036<b29>"
"\037<b30>"
"\040<b31>"
);
}
if (cpu_stdext_feature != 0) {
printf("\n Structured Extended Features=0x%b",
cpu_stdext_feature,
"\020"
/* RDFSBASE/RDGSBASE/WRFSBASE/WRGSBASE */
"\001FSGSBASE"
"\002TSCADJ"
/* Bit Manipulation Instructions */
"\004BMI1"
/* Hardware Lock Elision */
"\005HLE"
/* Advanced Vector Instructions 2 */
"\006AVX2"
/* Supervisor Mode Execution Prot. */
"\010SMEP"
/* Bit Manipulation Instructions */
"\011BMI2"
"\012ERMS"
/* Invalidate Processor Context ID */
"\013INVPCID"
/* Restricted Transactional Memory */
"\014RTM"
/* Intel Memory Protection Extensions */
"\017MPX"
/* AVX512 Foundation */
"\021AVX512F"
/* Enhanced NRBG */
"\023RDSEED"
/* ADCX + ADOX */
"\024ADX"
/* Supervisor Mode Access Prevention */
"\025SMAP"
"\030CLFLUSHOPT"
"\032PROCTRACE"
"\033AVX512PF"
"\034AVX512ER"
"\035AVX512CD"
"\036SHA"
);
}
if (via_feature_rng != 0 || via_feature_xcrypt != 0)
print_via_padlock_info();
if ((cpu_feature & CPUID_HTT) &&
cpu_vendor_id == CPU_VENDOR_AMD)
cpu_feature &= ~CPUID_HTT;
/*
* If this CPU supports P-state invariant TSC then
* mention the capability.
*/
if (tsc_is_invariant) {
printf("\n TSC: P-state invariant");
if (tsc_perf_stat)
printf(", performance statistics");
}
}
}
/* Avoid ugly blank lines: only print newline when we have to. */
if (*cpu_vendor || cpu_id)
printf("\n");
if (!bootverbose)
return;
if (cpu_vendor_id == CPU_VENDOR_AMD)
print_AMD_info();
}
void
panicifcpuunsupported(void)
{
#ifndef HAMMER
#error "You need to specify a cpu type"
#endif
/*
* Now that we have told the user what they have,
* let them know if that machine type isn't configured.
*/
switch (cpu_class) {
case CPUCLASS_X86:
#ifndef HAMMER
case CPUCLASS_K8:
#endif
panic("CPU class not configured");
default:
break;
}
}
/* Update TSC freq with the value indicated by the caller. */
static void
tsc_freq_changed(void *arg __unused, const struct cf_level *level, int status)
{
/* If there was an error during the transition, don't do anything. */
if (status != 0)
return;
/* Total setting for this level gives the new frequency in MHz. */
hw_clockrate = level->total_set.freq;
}
static void
hook_tsc_freq(void *arg __unused)
{
if (tsc_is_invariant)
return;
tsc_post_tag = EVENTHANDLER_REGISTER(cpufreq_post_change,
tsc_freq_changed, NULL, EVENTHANDLER_PRI_ANY);
}
SYSINIT(hook_tsc_freq, SI_SUB_CONFIGURE, SI_ORDER_ANY, hook_tsc_freq, NULL);
/*
* Final stage of CPU identification.
*/
void
identify_cpu(void)
{
u_int regs[4], cpu_stdext_disable;
do_cpuid(0, regs);
cpu_high = regs[0];
((u_int *)&cpu_vendor)[0] = regs[1];
((u_int *)&cpu_vendor)[1] = regs[3];
((u_int *)&cpu_vendor)[2] = regs[2];
cpu_vendor[12] = '\0';
cpu_vendor_id = find_cpu_vendor_id();
do_cpuid(1, regs);
cpu_id = regs[0];
cpu_procinfo = regs[1];
cpu_feature = regs[3];
cpu_feature2 = regs[2];
/*
* Clear "Limit CPUID Maxval" bit and get the largest standard CPUID
* function number again if it is set from BIOS. It is necessary
* for probing correct CPU topology later.
* XXX This is only done on the BSP package.
*/
if (cpu_vendor_id == CPU_VENDOR_INTEL && cpu_high > 0 && cpu_high < 4) {
uint64_t msr;
msr = rdmsr(MSR_IA32_MISC_ENABLE);
if ((msr & 0x400000ULL) != 0) {
wrmsr(MSR_IA32_MISC_ENABLE, msr & ~0x400000ULL);
do_cpuid(0, regs);
cpu_high = regs[0];
}
}
if (cpu_high >= 5 && (cpu_feature2 & CPUID2_MON) != 0) {
do_cpuid(5, regs);
cpu_mon_mwait_flags = regs[2];
cpu_mon_min_size = regs[0] & CPUID5_MON_MIN_SIZE;
cpu_mon_max_size = regs[1] & CPUID5_MON_MAX_SIZE;
}
if (cpu_high >= 7) {
cpuid_count(7, 0, regs);
cpu_stdext_feature = regs[1];
/*
* Some hypervisors fail to filter out unsupported
* extended features. For now, disable the
* extensions, activation of which requires setting a
* bit in CR4, and which VM monitors do not support.
*/
if (cpu_feature2 & CPUID2_HV) {
cpu_stdext_disable = CPUID_STDEXT_FSGSBASE |
CPUID_STDEXT_SMEP;
} else
cpu_stdext_disable = 0;
TUNABLE_INT_FETCH("hw.cpu_stdext_disable", &cpu_stdext_disable);
cpu_stdext_feature &= ~cpu_stdext_disable;
}
if (cpu_vendor_id == CPU_VENDOR_INTEL ||
cpu_vendor_id == CPU_VENDOR_AMD ||
cpu_vendor_id == CPU_VENDOR_CENTAUR) {
do_cpuid(0x80000000, regs);
cpu_exthigh = regs[0];
}
if (cpu_exthigh >= 0x80000001) {
do_cpuid(0x80000001, regs);
amd_feature = regs[3] & ~(cpu_feature & 0x0183f3ff);
amd_feature2 = regs[2];
}
if (cpu_exthigh >= 0x80000007) {
do_cpuid(0x80000007, regs);
amd_pminfo = regs[3];
}
if (cpu_exthigh >= 0x80000008) {
do_cpuid(0x80000008, regs);
cpu_procinfo2 = regs[2];
}
/* XXX */
cpu = CPU_CLAWHAMMER;
}
static u_int
find_cpu_vendor_id(void)
{
int i;
for (i = 0; i < sizeof(cpu_vendors) / sizeof(cpu_vendors[0]); i++)
if (strcmp(cpu_vendor, cpu_vendors[i].vendor) == 0)
return (cpu_vendors[i].vendor_id);
return (0);
}
static void
print_AMD_assoc(int i)
{
if (i == 255)
printf(", fully associative\n");
else
printf(", %d-way associative\n", i);
}
static void
print_AMD_l2_assoc(int i)
{
switch (i & 0x0f) {
case 0: printf(", disabled/not present\n"); break;
case 1: printf(", direct mapped\n"); break;
case 2: printf(", 2-way associative\n"); break;
case 4: printf(", 4-way associative\n"); break;
case 6: printf(", 8-way associative\n"); break;
case 8: printf(", 16-way associative\n"); break;
case 15: printf(", fully associative\n"); break;
default: printf(", reserved configuration\n"); break;
}
}
static void
print_AMD_info(void)
{
u_int regs[4];
if (cpu_exthigh < 0x80000005)
return;
do_cpuid(0x80000005, regs);
printf("L1 2MB data TLB: %d entries", (regs[0] >> 16) & 0xff);
print_AMD_assoc(regs[0] >> 24);
printf("L1 2MB instruction TLB: %d entries", regs[0] & 0xff);
print_AMD_assoc((regs[0] >> 8) & 0xff);
printf("L1 4KB data TLB: %d entries", (regs[1] >> 16) & 0xff);
print_AMD_assoc(regs[1] >> 24);
printf("L1 4KB instruction TLB: %d entries", regs[1] & 0xff);
print_AMD_assoc((regs[1] >> 8) & 0xff);
printf("L1 data cache: %d kbytes", regs[2] >> 24);
printf(", %d bytes/line", regs[2] & 0xff);
printf(", %d lines/tag", (regs[2] >> 8) & 0xff);
print_AMD_assoc((regs[2] >> 16) & 0xff);
printf("L1 instruction cache: %d kbytes", regs[3] >> 24);
printf(", %d bytes/line", regs[3] & 0xff);
printf(", %d lines/tag", (regs[3] >> 8) & 0xff);
print_AMD_assoc((regs[3] >> 16) & 0xff);
if (cpu_exthigh >= 0x80000006) {
do_cpuid(0x80000006, regs);
if ((regs[0] >> 16) != 0) {
printf("L2 2MB data TLB: %d entries",
(regs[0] >> 16) & 0xfff);
print_AMD_l2_assoc(regs[0] >> 28);
printf("L2 2MB instruction TLB: %d entries",
regs[0] & 0xfff);
print_AMD_l2_assoc((regs[0] >> 28) & 0xf);
} else {
printf("L2 2MB unified TLB: %d entries",
regs[0] & 0xfff);
print_AMD_l2_assoc((regs[0] >> 28) & 0xf);
}
if ((regs[1] >> 16) != 0) {
printf("L2 4KB data TLB: %d entries",
(regs[1] >> 16) & 0xfff);
print_AMD_l2_assoc(regs[1] >> 28);
printf("L2 4KB instruction TLB: %d entries",
(regs[1] >> 16) & 0xfff);
print_AMD_l2_assoc((regs[1] >> 28) & 0xf);
} else {
printf("L2 4KB unified TLB: %d entries",
(regs[1] >> 16) & 0xfff);
print_AMD_l2_assoc((regs[1] >> 28) & 0xf);
}
printf("L2 unified cache: %d kbytes", regs[2] >> 16);
printf(", %d bytes/line", regs[2] & 0xff);
printf(", %d lines/tag", (regs[2] >> 8) & 0x0f);
print_AMD_l2_assoc((regs[2] >> 12) & 0x0f);
}
/*
* Opteron Rev E shows a bug as in very rare occasions a read memory
* barrier is not performed as expected if it is followed by a
* non-atomic read-modify-write instruction.
* As long as that bug pops up very rarely (intensive machine usage
* on other operating systems generally generates one unexplainable
* crash any 2 months) and as long as a model specific fix would be
* impratical at this stage, print out a warning string if the broken
* model and family are identified.
*/
if (CPUID_TO_FAMILY(cpu_id) == 0xf && CPUID_TO_MODEL(cpu_id) >= 0x20 &&
CPUID_TO_MODEL(cpu_id) <= 0x3f)
printf("WARNING: This architecture revision has known SMP "
"hardware bugs which may cause random instability\n");
}
static void
print_via_padlock_info(void)
{
u_int regs[4];
do_cpuid(0xc0000001, regs);
printf("\n VIA Padlock Features=0x%b", regs[3],
"\020"
"\003RNG" /* RNG */
"\007AES" /* ACE */
"\011AES-CTR" /* ACE2 */
"\013SHA1,SHA256" /* PHE */
"\015RSA" /* PMM */
);
}
Reference in New Issue View Git Blame Copy Permalink