lib/glibc
1
0
Fork 0
mirror of https://sourceware.org/git/glibc.git synced 2025-07-30 22:43:12 +03:00
Code Activity

x86: Fix tst-cpu-features-cpuinfo on Ryzen 9 (BZ #27873)

Browse Source 
AMD define different flags for IRPB, IBRS, and STIPBP [1], so new
x86_64_cpu are added and IBRS_IBPB is only tested for Intel.

The SSDB is also defined and implemented different on AMD [2],
and also a new AMD_SSDB flag is added.  It should map to the
cpuinfo 'ssdb' on recent AMD cpus.

It fixes tst-cpu-features-cpuinfo and tst-cpu-features-cpuinfo-static
on recent AMD cpus.

Checked on x86_64-linux-gnu on AMD Ryzen 9 5900X.

[1] https://developer.amd.com/wp-content/resources/Architecture_Guidelines_Update_Indirect_Branch_Control.pdf
[2] https://bugzilla.kernel.org/show_bug.cgi?id=199889

Reviewed-by: H.J. Lu <hjl.tools@gmail.com>
This commit is contained in:
Adhemerval Zanella
2021-06-22 16:41:28 -03:00
parent ea26ff0322
commit e3e3eb0a2e
4 changed files with 46 additions and 4 deletions
Download Patch File Download Diff File Expand all files Collapse all files

22
sysdeps/x86/tst-cpu-features-cpuinfo.c
View File

@ -16,10 +16,11 @@
License along with the GNU C Library; if not, see
<https://www.gnu.org/licenses/>. */
#include <sys/platform/x86.h>
#include <cpu-features.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <stdbool.h>
static char *cpu_flags;
@ -99,6 +100,7 @@ static int
do_test (int argc, char **argv)
{
int fails = 0;
const struct cpu_features *cpu_features = __get_cpu_features ();
get_cpuinfo ();
fails += CHECK_PROC (acpi, ACPI);
@ -159,7 +161,17 @@ do_test (int argc, char **argv)
fails += CHECK_PROC (hle, HLE);
fails += CHECK_PROC (ht, HTT);
fails += CHECK_PROC (hybrid, HYBRID);
fails += CHECK_PROC (ibrs, IBRS_IBPB);
if (cpu_features->basic.kind == arch_kind_intel)
{
fails += CHECK_PROC (ibrs, IBRS_IBPB);
fails += CHECK_PROC (stibp, STIBP);
}
else if (cpu_features->basic.kind == arch_kind_amd)
{
fails += CHECK_PROC (ibpb, AMD_IBPB);
fails += CHECK_PROC (ibrs, AMD_IBRS);
fails += CHECK_PROC (stibp, AMD_STIBP);
}
fails += CHECK_PROC (ibt, IBT);
fails += CHECK_PROC (invariant_tsc, INVARIANT_TSC);
fails += CHECK_PROC (invpcid, INVPCID);
@ -221,7 +233,10 @@ do_test (int argc, char **argv)
fails += CHECK_PROC (smep, SMEP);
fails += CHECK_PROC (smx, SMX);
fails += CHECK_PROC (ss, SS);
fails += CHECK_PROC (ssbd, SSBD);
if (cpu_features->basic.kind == arch_kind_intel)
fails += CHECK_PROC (ssbd, SSBD);
else if (cpu_features->basic.kind == arch_kind_amd)
fails += CHECK_PROC (ssbd, AMD_SSBD);
fails += CHECK_PROC (sse, SSE);
fails += CHECK_PROC (sse2, SSE2);
fails += CHECK_PROC (pni, SSE3);
@ -229,7 +244,6 @@ do_test (int argc, char **argv)
fails += CHECK_PROC (sse4_2, SSE4_2);
fails += CHECK_PROC (sse4a, SSE4A);
fails += CHECK_PROC (ssse3, SSSE3);
fails += CHECK_PROC (stibp, STIBP);
fails += CHECK_PROC (svm, SVM);
#ifdef __x86_64__
/* NB: SYSCALL_SYSRET is 64-bit only. */