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<sys/platform/x86.h>: Add LBR support

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Add architectural LBR support to <sys/platform/x86.h>.
Reviewed-by: Noah Goldstein <goldstein.w.n@gmail.com>
This commit is contained in:
H.J. Lu 2023-04-05 09:21:32 -07:00
parent f47b7d96fb
commit fb90dc8513
3 changed files with 5 additions and 1 deletions
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3
manual/platform.texi
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@ -406,6 +406,9 @@ the indirect branch predictor barrier (IBPB).
@item
@code{LAM} -- Linear Address Masking.
@item
@code{LBR} -- Architectural LBR.
@item
@code{LM} -- Long mode.

2
sysdeps/x86/bits/platform/x86.h
View file

@ -219,7 +219,7 @@ enum
x86_cpu_TSXLDTRK = x86_cpu_index_7_edx + 16,
x86_cpu_INDEX_7_EDX_17 = x86_cpu_index_7_edx + 17,
x86_cpu_PCONFIG = x86_cpu_index_7_edx + 18,
x86_cpu_INDEX_7_EDX_19 = x86_cpu_index_7_edx + 19,
x86_cpu_LBR = x86_cpu_index_7_edx + 19,
x86_cpu_IBT = x86_cpu_index_7_edx + 20,
x86_cpu_INDEX_7_EDX_21 = x86_cpu_index_7_edx + 21,
x86_cpu_AMX_BF16 = x86_cpu_index_7_edx + 22,

1
sysdeps/x86/tst-get-cpu-features.c
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@ -166,6 +166,7 @@ do_test (void)
CHECK_CPU_FEATURE_PRESENT (SERIALIZE);
CHECK_CPU_FEATURE_PRESENT (HYBRID);
CHECK_CPU_FEATURE_PRESENT (TSXLDTRK);
CHECK_CPU_FEATURE_PRESENT (LBR);
CHECK_CPU_FEATURE_PRESENT (PCONFIG);
CHECK_CPU_FEATURE_PRESENT (IBT);
CHECK_CPU_FEATURE_PRESENT (AMX_BF16);