[09/19] <sys/platform/x86.h>: Add LASS support
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Commit Message
Add Linear Address Space Separation (LASS) support to <sys/platform/x86.h>.
---
manual/platform.texi | 3 +++
sysdeps/x86/bits/platform/x86.h | 1 +
sysdeps/x86/tst-get-cpu-features.c | 1 +
3 files changed, 5 insertions(+)
Comments
On Wed, Apr 5, 2023 at 11:26 AM H.J. Lu via Libc-alpha
<libc-alpha@sourceware.org> wrote:
>
> Add Linear Address Space Separation (LASS) support to <sys/platform/x86.h>.
> ---
> manual/platform.texi | 3 +++
> sysdeps/x86/bits/platform/x86.h | 1 +
> sysdeps/x86/tst-get-cpu-features.c | 1 +
> 3 files changed, 5 insertions(+)
>
> diff --git a/manual/platform.texi b/manual/platform.texi
> index a6e33b1572..be04194c88 100644
> --- a/manual/platform.texi
> +++ b/manual/platform.texi
> @@ -406,6 +406,9 @@ the indirect branch predictor barrier (IBPB).
> @item
> @code{LAM} -- Linear Address Masking.
>
> +@item
> +@code{LASS} -- Linear Address Space Separation.
> +
> @item
> @code{LBR} -- Architectural LBR.
>
> diff --git a/sysdeps/x86/bits/platform/x86.h b/sysdeps/x86/bits/platform/x86.h
> index 6fc3b69651..c9ee8fcf90 100644
> --- a/sysdeps/x86/bits/platform/x86.h
> +++ b/sysdeps/x86/bits/platform/x86.h
> @@ -291,6 +291,7 @@ enum
> x86_cpu_RAO_INT = x86_cpu_index_7_ecx_1_eax + 3,
> x86_cpu_AVX_VNNI = x86_cpu_index_7_ecx_1_eax + 4,
> x86_cpu_AVX512_BF16 = x86_cpu_index_7_ecx_1_eax + 5,
> + x86_cpu_LASS = x86_cpu_index_7_ecx_1_eax + 6,
> x86_cpu_FZLRM = x86_cpu_index_7_ecx_1_eax + 10,
> x86_cpu_FSRS = x86_cpu_index_7_ecx_1_eax + 11,
> x86_cpu_FSRCS = x86_cpu_index_7_ecx_1_eax + 12,
> diff --git a/sysdeps/x86/tst-get-cpu-features.c b/sysdeps/x86/tst-get-cpu-features.c
> index 6a3f29db98..9da561a559 100644
> --- a/sysdeps/x86/tst-get-cpu-features.c
> +++ b/sysdeps/x86/tst-get-cpu-features.c
> @@ -203,6 +203,7 @@ do_test (void)
> CHECK_CPU_FEATURE_PRESENT (RAO_INT);
> CHECK_CPU_FEATURE_PRESENT (AVX_VNNI);
> CHECK_CPU_FEATURE_PRESENT (AVX512_BF16);
> + CHECK_CPU_FEATURE_PRESENT (LASS);
> CHECK_CPU_FEATURE_PRESENT (FZLRM);
> CHECK_CPU_FEATURE_PRESENT (FSRS);
> CHECK_CPU_FEATURE_PRESENT (FSRCS);
> --
> 2.39.2
>
LGTM
Reviewed-by: Noah Goldstein <goldstein.w.n@gmail.com>
@@ -406,6 +406,9 @@ the indirect branch predictor barrier (IBPB).
@item
@code{LAM} -- Linear Address Masking.
+@item
+@code{LASS} -- Linear Address Space Separation.
+
@item
@code{LBR} -- Architectural LBR.
@@ -291,6 +291,7 @@ enum
x86_cpu_RAO_INT = x86_cpu_index_7_ecx_1_eax + 3,
x86_cpu_AVX_VNNI = x86_cpu_index_7_ecx_1_eax + 4,
x86_cpu_AVX512_BF16 = x86_cpu_index_7_ecx_1_eax + 5,
+ x86_cpu_LASS = x86_cpu_index_7_ecx_1_eax + 6,
x86_cpu_FZLRM = x86_cpu_index_7_ecx_1_eax + 10,
x86_cpu_FSRS = x86_cpu_index_7_ecx_1_eax + 11,
x86_cpu_FSRCS = x86_cpu_index_7_ecx_1_eax + 12,
@@ -203,6 +203,7 @@ do_test (void)
CHECK_CPU_FEATURE_PRESENT (RAO_INT);
CHECK_CPU_FEATURE_PRESENT (AVX_VNNI);
CHECK_CPU_FEATURE_PRESENT (AVX512_BF16);
+ CHECK_CPU_FEATURE_PRESENT (LASS);
CHECK_CPU_FEATURE_PRESENT (FZLRM);
CHECK_CPU_FEATURE_PRESENT (FSRS);
CHECK_CPU_FEATURE_PRESENT (FSRCS);