Author: kib
Date: Sun Jan 21 10:38:38 2018
New Revision: 328214
URL: https://svnweb.freebsd.org/changeset/base/328214
Log:
MFC r323822 (by cem):
x86: Decode AMD "Extended Feature Extensions ID EBX" bits.
Modified:
stable/11/sys/x86/include/specialreg.h
stable/11/sys/x86/include/x86_var.h
stable/11/sys/x86/x86/identcpu.c
Directory Properties:
stable/11/ (props changed)
Modified: stable/11/sys/x86/include/specialreg.h
==============================================================================
--- stable/11/sys/x86/include/specialreg.h Sun Jan 21 10:35:17 2018
(r328213)
+++ stable/11/sys/x86/include/specialreg.h Sun Jan 21 10:38:38 2018
(r328214)
@@ -323,6 +323,13 @@
#define AMDPM_CPB 0x00000200
/*
+ * AMD extended function 8000_0008h ebx info (amd_extended_feature_extensions)
+ */
+#define AMDFEID_CLZERO 0x00000001
+#define AMDFEID_IRPERF 0x00000002
+#define AMDFEID_XSAVEERPTR 0x00000004
+
+/*
* AMD extended function 8000_0008h ecx info
*/
#define AMDID_CMP_CORES 0x000000ff
Modified: stable/11/sys/x86/include/x86_var.h
==============================================================================
--- stable/11/sys/x86/include/x86_var.h Sun Jan 21 10:35:17 2018
(r328213)
+++ stable/11/sys/x86/include/x86_var.h Sun Jan 21 10:38:38 2018
(r328214)
@@ -45,6 +45,7 @@ extern u_int cpu_feature2;
extern u_int amd_feature;
extern u_int amd_feature2;
extern u_int amd_pminfo;
+extern u_int amd_extended_feature_extensions;
extern u_int via_feature_rng;
extern u_int via_feature_xcrypt;
extern u_int cpu_clflush_line_size;
Modified: stable/11/sys/x86/x86/identcpu.c
==============================================================================
--- stable/11/sys/x86/x86/identcpu.c Sun Jan 21 10:35:17 2018
(r328213)
+++ stable/11/sys/x86/x86/identcpu.c Sun Jan 21 10:38:38 2018
(r328214)
@@ -92,6 +92,7 @@ u_int cpu_feature2; /* Feature flags */
u_int amd_feature; /* AMD feature flags */
u_int amd_feature2; /* AMD feature flags */
u_int amd_pminfo; /* AMD advanced power management info */
+u_int amd_extended_feature_extensions;
u_int via_feature_rng; /* VIA RNG features */
u_int via_feature_xcrypt; /* VIA ACE features */
u_int cpu_high; /* Highest arg to CPUID */
@@ -992,6 +993,16 @@ printcpuinfo(void)
}
}
+ if (amd_extended_feature_extensions != 0) {
+ printf("\n "
+ "AMD Extended Feature Extensions ID EBX="
+ "0x%b", amd_extended_feature_extensions,
+ "\020"
+ "\001CLZERO"
+ "\002IRPerf"
+ "\003XSaveErPtr");
+ }
+
if (via_feature_rng != 0 || via_feature_xcrypt != 0)
print_via_padlock_info();
@@ -1473,6 +1484,7 @@ finishidentcpu(void)
if (cpu_exthigh >= 0x80000008) {
do_cpuid(0x80000008, regs);
cpu_maxphyaddr = regs[0] & 0xff;
+ amd_extended_feature_extensions = regs[1];
cpu_procinfo2 = regs[2];
} else {
cpu_maxphyaddr = (cpu_feature & CPUID_PAE) != 0 ? 36 : 32;
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