From fb90dc8513f67d1cc0578452aee3459e9b9ab626 Mon Sep 17 00:00:00 2001 From: "H.J. Lu" Date: Wed, 5 Apr 2023 09:21:32 -0700 Subject: [PATCH] : Add LBR support Add architectural LBR support to . Reviewed-by: Noah Goldstein --- manual/platform.texi | 3 +++ sysdeps/x86/bits/platform/x86.h | 2 +- sysdeps/x86/tst-get-cpu-features.c | 1 + 3 files changed, 5 insertions(+), 1 deletion(-) diff --git a/manual/platform.texi b/manual/platform.texi index 2ab687c..b72518e 100644 --- a/manual/platform.texi +++ b/manual/platform.texi @@ -407,6 +407,9 @@ the indirect branch predictor barrier (IBPB). @code{LAM} -- Linear Address Masking. @item +@code{LBR} -- Architectural LBR. + +@item @code{LM} -- Long mode. @item diff --git a/sysdeps/x86/bits/platform/x86.h b/sysdeps/x86/bits/platform/x86.h index 6d9dd6d..1040c2a 100644 --- a/sysdeps/x86/bits/platform/x86.h +++ b/sysdeps/x86/bits/platform/x86.h @@ -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, diff --git a/sysdeps/x86/tst-get-cpu-features.c b/sysdeps/x86/tst-get-cpu-features.c index 8b7e70ae..cfc8692 100644 --- a/sysdeps/x86/tst-get-cpu-features.c +++ b/sysdeps/x86/tst-get-cpu-features.c @@ -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); -- 2.7.4