[glibc] <sys/platform/x86.h>: Add MSRLIST support

[glibc] <sys/platform/x86.h>: Add MSRLIST support

[H.J. Lu]

https://sourceware.org/git/gitweb.cgi?p=glibc.git;h=b39741b45f3de7090a7f7fdd8bc487382d53b848

commit b39741b45f3de7090a7f7fdd8bc487382d53b848
Author: H.J. Lu <hjl.tools@gmail.com>
Date:   Wed Apr 5 09:21:40 2023 -0700

    <sys/platform/x86.h>: Add MSRLIST support
    
    Add MSRLIST support to <sys/platform/x86.h>.
    Reviewed-by: Noah Goldstein <goldstein.w.n@gmail.com>

Diff:
---
 manual/platform.texi               | 4 ++++
 sysdeps/x86/bits/platform/x86.h    | 1 +
 sysdeps/x86/tst-get-cpu-features.c | 1 +
 3 files changed, 6 insertions(+)

diff --git a/manual/platform.texi b/manual/platform.texi
index af75e5c413..bfccd024a5 100644
--- a/manual/platform.texi
+++ b/manual/platform.texi
@@ -464,6 +464,10 @@ the indirect branch predictor barrier (IBPB).
 @item
 @code{MSR} -- Model Specific Registers RDMSR and WRMSR instructions.
 
+@item
+@code{MSRLIST} -- RDMSRLIST/WRMSRLIST instructions and IA32_BARRIER
+MSR.
+
 @item
 @code{MTRR} -- Memory Type Range Registers.
 
diff --git a/sysdeps/x86/bits/platform/x86.h b/sysdeps/x86/bits/platform/x86.h
index abc0116607..57973e9a6c 100644
--- a/sysdeps/x86/bits/platform/x86.h
+++ b/sysdeps/x86/bits/platform/x86.h
@@ -302,6 +302,7 @@ enum
   x86_cpu_HRESET		= x86_cpu_index_7_ecx_1_eax + 22,
   x86_cpu_AVX_IFMA		= x86_cpu_index_7_ecx_1_eax + 23,
   x86_cpu_LAM			= x86_cpu_index_7_ecx_1_eax + 26,
+  x86_cpu_MSRLIST		= x86_cpu_index_7_ecx_1_eax + 27,
 
   x86_cpu_index_19_ebx
     = (CPUID_INDEX_19 * 8 * 4 * sizeof (unsigned int)
diff --git a/sysdeps/x86/tst-get-cpu-features.c b/sysdeps/x86/tst-get-cpu-features.c
index 3a2d4671ec..0c948c2b04 100644
--- a/sysdeps/x86/tst-get-cpu-features.c
+++ b/sysdeps/x86/tst-get-cpu-features.c
@@ -214,6 +214,7 @@ do_test (void)
   CHECK_CPU_FEATURE_PRESENT (HRESET);
   CHECK_CPU_FEATURE_PRESENT (AVX_IFMA);
   CHECK_CPU_FEATURE_PRESENT (LAM);
+  CHECK_CPU_FEATURE_PRESENT (MSRLIST);
   CHECK_CPU_FEATURE_PRESENT (AESKLE);
   CHECK_CPU_FEATURE_PRESENT (WIDE_KL);
   CHECK_CPU_FEATURE_PRESENT (PTWRITE);