From: "H.J. Lu" <hjl.tools@gmail.com>
To: libc-alpha@sourceware.org
Subject: [PATCH] x86: Disable OSXSAVE related features [BZ #27605]
Date: Fri, 19 Mar 2021 06:27:51 -0700 [thread overview]
Message-ID: <20210319132751.3845006-1-hjl.tools@gmail.com> (raw)
If OSXSAVE is disabled by glibc tunables, disable features which depend
on OSXSAVE.
---
sysdeps/x86/cpu-features.c | 40 ++++++++++++++++++++++++++++++++++++++
1 file changed, 40 insertions(+)
diff --git a/sysdeps/x86/cpu-features.c b/sysdeps/x86/cpu-features.c
index d7248cbb45..804e9a879b 100644
--- a/sysdeps/x86/cpu-features.c
+++ b/sysdeps/x86/cpu-features.c
@@ -654,6 +654,46 @@ no_cpuid:
#if HAVE_TUNABLES
TUNABLE_GET (hwcaps, tunable_val_t *, TUNABLE_CALLBACK (set_hwcaps));
+
+ if (!CPU_FEATURE_USABLE_P (cpu_features, OSXSAVE))
+ {
+ /* These features are usable only if OSXSAVE is usable. */
+ cpu_features->xsave_state_size = 0;
+ CPU_FEATURE_UNSET (cpu_features, AVX);
+ CPU_FEATURE_UNSET (cpu_features, AVX2);
+ CPU_FEATURE_UNSET (cpu_features, AVX_VNNI);
+ CPU_FEATURE_UNSET (cpu_features, FMA);
+ CPU_FEATURE_UNSET (cpu_features, VAES);
+ CPU_FEATURE_UNSET (cpu_features, VPCLMULQDQ);
+ CPU_FEATURE_UNSET (cpu_features, XOP);
+ CPU_FEATURE_UNSET (cpu_features, F16C);
+ CPU_FEATURE_UNSET (cpu_features, AVX512F);
+ CPU_FEATURE_UNSET (cpu_features, AVX512CD);
+ CPU_FEATURE_UNSET (cpu_features, AVX512ER);
+ CPU_FEATURE_UNSET (cpu_features, AVX512PF);
+ CPU_FEATURE_UNSET (cpu_features, AVX512VL);
+ CPU_FEATURE_UNSET (cpu_features, AVX512DQ);
+ CPU_FEATURE_UNSET (cpu_features, AVX512BW);
+ CPU_FEATURE_UNSET (cpu_features, AVX512_4FMAPS);
+ CPU_FEATURE_UNSET (cpu_features, AVX512_4VNNIW);
+ CPU_FEATURE_UNSET (cpu_features, AVX512_BITALG);
+ CPU_FEATURE_UNSET (cpu_features, AVX512_IFMA);
+ CPU_FEATURE_UNSET (cpu_features, AVX512_VBMI);
+ CPU_FEATURE_UNSET (cpu_features, AVX512_VBMI2);
+ CPU_FEATURE_UNSET (cpu_features, AVX512_VNNI);
+ CPU_FEATURE_UNSET (cpu_features, AVX512_VPOPCNTDQ);
+ CPU_FEATURE_UNSET (cpu_features, AVX512_VP2INTERSECT);
+ CPU_FEATURE_UNSET (cpu_features, AVX512_BF16);
+ CPU_FEATURE_UNSET (cpu_features, AVX512_FP16);
+ CPU_FEATURE_UNSET (cpu_features, AMX_BF16);
+ CPU_FEATURE_UNSET (cpu_features, AMX_TILE);
+ CPU_FEATURE_UNSET (cpu_features, AMX_INT8);
+ CPU_FEATURE_UNSET (cpu_features, XSAVE);
+ CPU_FEATURE_UNSET (cpu_features, XSAVEOPT);
+ CPU_FEATURE_UNSET (cpu_features, XSAVEC);
+ CPU_FEATURE_UNSET (cpu_features, XGETBV_ECX_1);
+ CPU_FEATURE_UNSET (cpu_features, XFD);
+ }
#elif defined SHARED
/* Reuse dl_platform, dl_hwcap and dl_hwcap_mask for x86. The
glibc.cpu.hwcap_mask tunable is initialized already, so no
--
2.30.2
next reply other threads:[~2021-03-19 13:27 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-03-19 13:27 H.J. Lu [this message]
2021-03-19 21:42 ` DJ Delorie
2021-03-19 22:22 ` [PATCH v2] " H.J. Lu
2021-03-20 0:06 ` [PATCH v3] x86: Properly disable XSAVE " H.J. Lu
2021-03-22 18:32 ` DJ Delorie
2021-03-22 18:38 ` H.J. Lu
2021-03-22 18:42 ` DJ Delorie
2021-03-23 13:08 ` H.J. Lu
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