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[src/trunk]: src/usr.sbin/cpuctl/arch Get CPU topology data for AMD processors.
details: https://anonhg.NetBSD.org/src/rev/c13276b6e920
branches: trunk
changeset: 451221:c13276b6e920
user: mlelstv <mlelstv%NetBSD.org@localhost>
date: Fri May 10 16:42:57 2019 +0000
description:
Get CPU topology data for AMD processors.
diffstat:
usr.sbin/cpuctl/arch/cpuctl_i386.h | 3 +-
usr.sbin/cpuctl/arch/i386-asm.S | 14 ++++++-
usr.sbin/cpuctl/arch/i386.c | 81 +++++++++++++++++++++++++++++++++++++-
usr.sbin/cpuctl/arch/x86_64-asm.S | 14 ++++++-
4 files changed, 107 insertions(+), 5 deletions(-)
diffs (201 lines):
diff -r 113c64eae761 -r c13276b6e920 usr.sbin/cpuctl/arch/cpuctl_i386.h
--- a/usr.sbin/cpuctl/arch/cpuctl_i386.h Fri May 10 16:28:00 2019 +0000
+++ b/usr.sbin/cpuctl/arch/cpuctl_i386.h Fri May 10 16:42:57 2019 +0000
@@ -1,4 +1,4 @@
-/* $NetBSD: cpuctl_i386.h,v 1.2 2013/01/07 23:20:42 dsl Exp $ */
+/* $NetBSD: cpuctl_i386.h,v 1.3 2019/05/10 16:42:57 mlelstv Exp $ */
/* Interfaces to code in i386-asm.S */
@@ -7,3 +7,4 @@
void x86_cpuid2(uint32_t, uint32_t, uint32_t *);
uint32_t x86_identify(void);
uint32_t x86_xgetbv(void);
+uint64_t rdmsr(u_int);
diff -r 113c64eae761 -r c13276b6e920 usr.sbin/cpuctl/arch/i386-asm.S
--- a/usr.sbin/cpuctl/arch/i386-asm.S Fri May 10 16:28:00 2019 +0000
+++ b/usr.sbin/cpuctl/arch/i386-asm.S Fri May 10 16:42:57 2019 +0000
@@ -1,4 +1,4 @@
-/* $NetBSD: i386-asm.S,v 1.4 2015/03/01 18:02:42 tnn Exp $ */
+/* $NetBSD: i386-asm.S,v 1.5 2019/05/10 16:42:57 mlelstv Exp $ */
/*-
* Copyright (c) 1998, 2000, 2004, 2006, 2007 The NetBSD Foundation, Inc.
@@ -30,6 +30,9 @@
#include <machine/cputypes.h>
#include <machine/psl.h>
+/* From sys/arch/x86/include/cpufunc.h */
+#define OPTERON_MSR_PASSCODE 0x9c5a203aU
+
.text
ENTRY(x86_cpuid2)
@@ -160,3 +163,12 @@
is486dlc:
movl $CPU_486DLC,%eax
ret
+
+ENTRY(rdmsr_locked)
+ movl 4(%esp), %ecx
+ pushl %edi
+ movl $OPTERON_MSR_PASSCODE, %edi
+ rdmsr
+ popl %edi
+ ret
+END(rdmsr_locked)
diff -r 113c64eae761 -r c13276b6e920 usr.sbin/cpuctl/arch/i386.c
--- a/usr.sbin/cpuctl/arch/i386.c Fri May 10 16:28:00 2019 +0000
+++ b/usr.sbin/cpuctl/arch/i386.c Fri May 10 16:42:57 2019 +0000
@@ -1,4 +1,4 @@
-/* $NetBSD: i386.c,v 1.95 2019/03/24 04:43:54 msaitoh Exp $ */
+/* $NetBSD: i386.c,v 1.96 2019/05/10 16:42:57 mlelstv Exp $ */
/*-
* Copyright (c) 1999, 2000, 2001, 2006, 2007, 2008 The NetBSD Foundation, Inc.
@@ -57,7 +57,7 @@
#include <sys/cdefs.h>
#ifndef lint
-__RCSID("$NetBSD: i386.c,v 1.95 2019/03/24 04:43:54 msaitoh Exp $");
+__RCSID("$NetBSD: i386.c,v 1.96 2019/05/10 16:42:57 mlelstv Exp $");
#endif /* not lint */
#include <sys/types.h>
@@ -119,6 +119,7 @@
uint8_t ci_coreid;
uint8_t ci_smtid;
uint32_t ci_initapicid;
+ uint32_t ci_max_ext_cpuid;
uint32_t ci_cur_xsave;
uint32_t ci_max_xsave;
@@ -1925,6 +1926,76 @@
}
static void
+identifycpu_cpuids_amd(struct cpu_info *ci)
+{
+ const char *cpuname = ci->ci_dev;
+ u_int lp_max, core_max;
+ int n, cpu_family, apic_id, smt_bits, core_bits = 0;
+ uint32_t descs[4];
+
+ apic_id = ci->ci_initapicid;
+ cpu_family = CPUID_TO_FAMILY(ci->ci_signature);
+
+ if (cpu_family < 0xf)
+ return;
+
+ if ((ci->ci_feat_val[0] & CPUID_HTT) != 0) {
+ x86_cpuid(1, descs);
+ lp_max = __SHIFTOUT(descs[1], CPUID_HTT_CORES);
+
+ if (cpu_family >= 0x10 && ci->ci_max_ext_cpuid >= 0x8000008) {
+ x86_cpuid(0x8000008, descs);
+ core_max = (descs[2] & 0xff) + 1;
+ n = (descs[2] >> 12) & 0x0f;
+ if (n != 0)
+ core_bits = n;
+ }
+ } else {
+ lp_max = 1;
+ }
+ core_max = lp_max;
+
+ smt_bits = ilog2((lp_max / core_max) - 1) + 1;
+ if (core_bits == 0)
+ core_bits = ilog2(core_max - 1) + 1;
+
+ if (cpu_family < 0x11) {
+ const uint64_t reg = rdmsr(MSR_NB_CFG);
+ if ((reg & NB_CFG_INITAPICCPUIDLO) == 0) {
+ const u_int node_id = apic_id & __BITS(0, 2);
+ apic_id = (cpu_family == 0xf) ?
+ (apic_id >> core_bits) | (node_id << core_bits) :
+ (apic_id >> 5) | (node_id << 2);
+ }
+ }
+
+ if (cpu_family == 0x17) {
+ x86_cpuid(0x8000001e, descs);
+ const u_int threads = ((descs[1] >> 8) & 0xff) + 1;
+ smt_bits = ilog2(threads);
+ core_bits -= smt_bits;
+ }
+
+ if (smt_bits + core_bits) {
+ if (smt_bits + core_bits < 32)
+ ci->ci_packageid = 0;
+ }
+ if (core_bits) {
+ u_int core_mask = __BITS(smt_bits, smt_bits + core_bits - 1);
+ ci->ci_coreid = __SHIFTOUT(apic_id, core_mask);
+ }
+ if (smt_bits) {
+ u_int smt_mask = __BITS(0, smt_bits - 1);
+ ci->ci_smtid = __SHIFTOUT(apic_id, smt_mask);
+ }
+
+ aprint_verbose("%s: Cluster/Package ID %u\n", cpuname,
+ ci->ci_packageid);
+ aprint_verbose("%s: Core ID %u\n", cpuname, ci->ci_coreid);
+ aprint_verbose("%s: SMT ID %u\n", cpuname, ci->ci_smtid);
+}
+
+static void
identifycpu_cpuids(struct cpu_info *ci)
{
const char *cpuname = ci->ci_dev;
@@ -1936,6 +2007,8 @@
if (cpu_vendor == CPUVENDOR_INTEL)
identifycpu_cpuids_intel(ci);
+ else if (cpu_vendor == CPUVENDOR_AMD)
+ identifycpu_cpuids_amd(ci);
}
void
@@ -2213,6 +2286,10 @@
if (cpu_vendor == CPUVENDOR_AMD) {
x86_cpuid(0x80000000, descs);
+ if (descs[0] >= 0x80000000)
+ ci->ci_max_ext_cpuid = descs[0];
+ else
+ ci->ci_max_ext_cpuid = 0;
if (descs[0] >= 0x80000007)
powernow_probe(ci);
diff -r 113c64eae761 -r c13276b6e920 usr.sbin/cpuctl/arch/x86_64-asm.S
--- a/usr.sbin/cpuctl/arch/x86_64-asm.S Fri May 10 16:28:00 2019 +0000
+++ b/usr.sbin/cpuctl/arch/x86_64-asm.S Fri May 10 16:42:57 2019 +0000
@@ -1,4 +1,4 @@
-/* $NetBSD: x86_64-asm.S,v 1.5 2015/03/01 18:02:42 tnn Exp $ */
+/* $NetBSD: x86_64-asm.S,v 1.6 2019/05/10 16:42:57 mlelstv Exp $ */
/*-
* Copyright (c) 2007 The NetBSD Foundation, Inc.
@@ -28,6 +28,9 @@
#include <machine/asm.h>
+/* From sys/arch/x86/include/cpufunc.h */
+#define OPTERON_MSR_PASSCODE 0x9c5a203aU
+
.text
ENTRY(x86_cpuid2)
@@ -51,3 +54,12 @@
ENTRY(x86_identify)
movl $-1,%eax
ret
+
+ENTRY(rdmsr)
+ movq %rdi, %rcx
+ xorq %rax, %rax
+ movl $OPTERON_MSR_PASSCODE, %edi
+ rdmsr
+ shlq $32, %rdx
+ orq %rdx, %rax
+ ret
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