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[src/trunk]: src - AMD CPUID Fn8000_0001d Cache Topology Information leaf is ...
details: https://anonhg.NetBSD.org/src/rev/586727ab2ede
branches: trunk
changeset: 457997:586727ab2ede
user: msaitoh <msaitoh%NetBSD.org@localhost>
date: Fri Jul 26 10:03:40 2019 +0000
description:
- AMD CPUID Fn8000_0001d Cache Topology Information leaf is almost the same as
Intel Deterministic Cache Parameter Leaf(0x04), so make new
cpu_dcp_cacheinfo() and share it.
- AMD's L2 and L3's cache descriptor's definition is the same, so use one
common definition.
- KNF.
XXX Split some common functions to new identcpu_subr.c or use #ifdef _KERNEK
... #endif in identcpu.c to share from both kernel and cpuctl?
diffstat:
sys/arch/x86/include/cacheinfo.h | 21 +---
sys/arch/x86/include/specialreg.h | 10 +-
sys/arch/x86/x86/identcpu.c | 174 ++++++++++++++++-----------------
usr.sbin/cpuctl/arch/i386.c | 193 ++++++++++++++++++-------------------
4 files changed, 193 insertions(+), 205 deletions(-)
diffs (truncated from 692 to 300 lines):
diff -r 65a5e4e64a00 -r 586727ab2ede sys/arch/x86/include/cacheinfo.h
--- a/sys/arch/x86/include/cacheinfo.h Fri Jul 26 09:26:56 2019 +0000
+++ b/sys/arch/x86/include/cacheinfo.h Fri Jul 26 10:03:40 2019 +0000
@@ -1,4 +1,4 @@
-/* $NetBSD: cacheinfo.h,v 1.27 2019/07/24 10:45:47 msaitoh Exp $ */
+/* $NetBSD: cacheinfo.h,v 1.28 2019/07/26 10:03:40 msaitoh Exp $ */
#ifndef _X86_CACHEINFO_H_
#define _X86_CACHEINFO_H_
@@ -339,7 +339,7 @@
__CI_TBL(0, 0, 0, 0, 0, NULL) \
}
-#define AMD_L2CACHE_INFO { \
+#define AMD_L2L3CACHE_INFO { \
__CI_TBL(0, 0x01, 1, 0, 0, NULL), \
__CI_TBL(0, 0x02, 2, 0, 0, NULL), \
__CI_TBL(0, 0x03, 3, 0, 0, NULL), \
@@ -347,22 +347,7 @@
__CI_TBL(0, 0x05, 6, 0, 0, NULL), \
__CI_TBL(0, 0x06, 8, 0, 0, NULL), \
__CI_TBL(0, 0x08, 16, 0, 0, NULL), \
-__CI_TBL(0, 0x0a, 32, 0, 0, NULL), \
-__CI_TBL(0, 0x0b, 48, 0, 0, NULL), \
-__CI_TBL(0, 0x0c, 64, 0, 0, NULL), \
-__CI_TBL(0, 0x0d, 96, 0, 0, NULL), \
-__CI_TBL(0, 0x0e, 128, 0, 0, NULL), \
-__CI_TBL(0, 0x0f, 0xff, 0, 0, NULL), \
-__CI_TBL(0, 0x00, 0, 0, 0, NULL) \
-}
-
-#define AMD_L3CACHE_INFO { \
-__CI_TBL(0, 0x01, 1, 0, 0, NULL), \
-__CI_TBL(0, 0x02, 2, 0, 0, NULL), \
-__CI_TBL(0, 0x04, 4, 0, 0, NULL), \
-__CI_TBL(0, 0x06, 8, 0, 0, NULL), \
-__CI_TBL(0, 0x08, 16, 0, 0, NULL), \
-__CI_TBL(0, 0x09, 16, 0, 0, NULL), \
+ /* 0x09:Use Fn8000_001D */ \
__CI_TBL(0, 0x0a, 32, 0, 0, NULL), \
__CI_TBL(0, 0x0b, 48, 0, 0, NULL), \
__CI_TBL(0, 0x0c, 64, 0, 0, NULL), \
diff -r 65a5e4e64a00 -r 586727ab2ede sys/arch/x86/include/specialreg.h
--- a/sys/arch/x86/include/specialreg.h Fri Jul 26 09:26:56 2019 +0000
+++ b/sys/arch/x86/include/specialreg.h Fri Jul 26 10:03:40 2019 +0000
@@ -1,4 +1,4 @@
-/* $NetBSD: specialreg.h,v 1.149 2019/07/13 09:28:03 msaitoh Exp $ */
+/* $NetBSD: specialreg.h,v 1.150 2019/07/26 10:03:40 msaitoh Exp $ */
/*
* Copyright (c) 2014-2019 The NetBSD Foundation, Inc.
@@ -736,6 +736,14 @@
"\21" "VGIF"
/*
+ * AMD Fn8000_0001d Cache Topology Information.
+ * It's almost the same as Intel Deterministic Cache Parameter Leaf(0x04)
+ * except the following:
+ * No Cores/package (%eax bit 31..26)
+ * No Complex cache indexing (%edx bit 2)
+ */
+
+/*
* Centaur Extended Feature flags
*/
#define CPUID_VIA_HAS_RNG 0x00000004 /* Random number generator */
diff -r 65a5e4e64a00 -r 586727ab2ede sys/arch/x86/x86/identcpu.c
--- a/sys/arch/x86/x86/identcpu.c Fri Jul 26 09:26:56 2019 +0000
+++ b/sys/arch/x86/x86/identcpu.c Fri Jul 26 10:03:40 2019 +0000
@@ -1,4 +1,4 @@
-/* $NetBSD: identcpu.c,v 1.92 2019/06/26 12:29:01 mgorny Exp $ */
+/* $NetBSD: identcpu.c,v 1.93 2019/07/26 10:03:40 msaitoh Exp $ */
/*-
* Copyright (c) 1999, 2000, 2001, 2006, 2007, 2008 The NetBSD Foundation, Inc.
@@ -30,7 +30,7 @@
*/
#include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: identcpu.c,v 1.92 2019/06/26 12:29:01 mgorny Exp $");
+__KERNEL_RCSID(0, "$NetBSD: identcpu.c,v 1.93 2019/07/26 10:03:40 msaitoh Exp $");
#include "opt_xen.h"
@@ -62,11 +62,8 @@
static const struct x86_cache_info intel_cpuid_cache_info[] = INTEL_CACHE_INFO;
-static const struct x86_cache_info amd_cpuid_l2cache_assoc_info[] =
- AMD_L2CACHE_INFO;
-
-static const struct x86_cache_info amd_cpuid_l3cache_assoc_info[] =
- AMD_L3CACHE_INFO;
+static const struct x86_cache_info amd_cpuid_l2l3cache_assoc_info[] =
+ AMD_L2L3CACHE_INFO;
int cpu_vendor;
char cpu_brand_string[49];
@@ -109,6 +106,66 @@
return (NULL);
}
+/*
+ * Get cache info from one of the following:
+ * Intel Deterministic Cache Parameter Leaf (0x04)
+ * AMD Cache Topology Information Leaf (0x8000001d)
+ */
+static void
+cpu_dcp_cacheinfo(struct cpu_info *ci, uint32_t leaf)
+{
+ u_int descs[4];
+ int type, level, ways, partitions, linesize, sets, totalsize;
+ int caitype = -1;
+ int i;
+
+ for (i = 0; ; i++) {
+ x86_cpuid2(leaf, i, descs);
+ type = __SHIFTOUT(descs[0], CPUID_DCP_CACHETYPE);
+ if (type == CPUID_DCP_CACHETYPE_N)
+ break;
+ level = __SHIFTOUT(descs[0], CPUID_DCP_CACHELEVEL);
+ switch (level) {
+ case 1:
+ if (type == CPUID_DCP_CACHETYPE_I)
+ caitype = CAI_ICACHE;
+ else if (type == CPUID_DCP_CACHETYPE_D)
+ caitype = CAI_DCACHE;
+ else
+ caitype = -1;
+ break;
+ case 2:
+ if (type == CPUID_DCP_CACHETYPE_U)
+ caitype = CAI_L2CACHE;
+ else
+ caitype = -1;
+ break;
+ case 3:
+ if (type == CPUID_DCP_CACHETYPE_U)
+ caitype = CAI_L3CACHE;
+ else
+ caitype = -1;
+ break;
+ default:
+ caitype = -1;
+ break;
+ }
+ if (caitype == -1)
+ continue;
+
+ ways = __SHIFTOUT(descs[1], CPUID_DCP_WAYS) + 1;
+ partitions =__SHIFTOUT(descs[1], CPUID_DCP_PARTITIONS)
+ + 1;
+ linesize = __SHIFTOUT(descs[1], CPUID_DCP_LINESIZE)
+ + 1;
+ sets = descs[2] + 1;
+ totalsize = ways * partitions * linesize * sets;
+ ci->ci_cinfo[caitype].cai_totalsize = totalsize;
+ ci->ci_cinfo[caitype].cai_associativity = ways;
+ ci->ci_cinfo[caitype].cai_linesize = linesize;
+ }
+}
+
static void
cpu_probe_intel_cache(struct cpu_info *ci)
{
@@ -142,59 +199,11 @@
}
}
- if (cpuid_level >= 4) {
- int type, level;
- int ways, partitions, linesize, sets;
- int caitype = -1;
- int totalsize;
+ if (cpuid_level < 4)
+ return;
- /* Parse the cache info from `cpuid leaf 4', if we have it. */
- for (i = 0; ; i++) {
- x86_cpuid2(4, i, descs);
- type = __SHIFTOUT(descs[0], CPUID_DCP_CACHETYPE);
- if (type == CPUID_DCP_CACHETYPE_N)
- break;
- level = __SHIFTOUT(descs[0], CPUID_DCP_CACHELEVEL);
- switch (level) {
- case 1:
- if (type == CPUID_DCP_CACHETYPE_I)
- caitype = CAI_ICACHE;
- else if (type == CPUID_DCP_CACHETYPE_D)
- caitype = CAI_DCACHE;
- else
- caitype = -1;
- break;
- case 2:
- if (type == CPUID_DCP_CACHETYPE_U)
- caitype = CAI_L2CACHE;
- else
- caitype = -1;
- break;
- case 3:
- if (type == CPUID_DCP_CACHETYPE_U)
- caitype = CAI_L3CACHE;
- else
- caitype = -1;
- break;
- default:
- caitype = -1;
- break;
- }
- if (caitype == -1)
- continue;
-
- ways = __SHIFTOUT(descs[1], CPUID_DCP_WAYS) + 1;
- partitions =__SHIFTOUT(descs[1], CPUID_DCP_PARTITIONS)
- + 1;
- linesize = __SHIFTOUT(descs[1], CPUID_DCP_LINESIZE)
- + 1;
- sets = descs[2] + 1;
- totalsize = ways * partitions * linesize * sets;
- ci->ci_cinfo[caitype].cai_totalsize = totalsize;
- ci->ci_cinfo[caitype].cai_associativity = ways;
- ci->ci_cinfo[caitype].cai_linesize = linesize;
- }
- }
+ /* Parse the cache info from `cpuid leaf 4', if we have it. */
+ cpu_dcp_cacheinfo(ci, 4);
}
static void
@@ -238,31 +247,21 @@
family = CPUID_TO_FAMILY(ci->ci_signature);
model = CPUID_TO_MODEL(ci->ci_signature);
- /*
- * K5 model 0 has none of this info.
- */
+ /* K5 model 0 has none of this info. */
if (family == 5 && model == 0)
return;
- /*
- * Determine the largest extended function value.
- */
+ /* Determine the largest extended function value. */
x86_cpuid(0x80000000, descs);
lfunc = descs[0];
- /*
- * Determine L1 cache/TLB info.
- */
- if (lfunc < 0x80000005) {
- /* No L1 cache info available. */
+ if (lfunc < 0x80000005)
return;
- }
+ /* Determine L1 cache/TLB info. */
x86_cpuid(0x80000005, descs);
- /*
- * K6-III and higher have large page TLBs.
- */
+ /* K6-III and higher have large page TLBs. */
if ((family == 5 && model >= 9) || family >= 6) {
cai = &ci->ci_cinfo[CAI_ITLB2];
cai->cai_totalsize = AMD_L1_EAX_ITLB_ENTRIES(descs[0]);
@@ -295,14 +294,10 @@
cai->cai_associativity = AMD_L1_EDX_IC_ASSOC(descs[3]);
cai->cai_linesize = AMD_L1_EDX_IC_LS(descs[3]);
- /*
- * Determine L2 cache/TLB info.
- */
- if (lfunc < 0x80000006) {
- /* No L2 cache info available. */
+ if (lfunc < 0x80000006)
return;
- }
+ /* Determine L2 cache/TLB info. */
x86_cpuid(0x80000006, descs);
cai = &ci->ci_cinfo[CAI_L2CACHE];
@@ -310,35 +305,33 @@
cai->cai_associativity = AMD_L2_ECX_C_ASSOC(descs[2]);
cai->cai_linesize = AMD_L2_ECX_C_LS(descs[2]);
- cp = cache_info_lookup(amd_cpuid_l2cache_assoc_info,
+ cp = cache_info_lookup(amd_cpuid_l2l3cache_assoc_info,
cai->cai_associativity);
if (cp != NULL)
cai->cai_associativity = cp->cai_associativity;
else
cai->cai_associativity = 0; /* XXX Unknown/reserved */
- if (family < 0xf) {
- /* No L3 cache info available. */
+ if (family < 0xf)
return;
- }
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