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[PATCH v2 5/5] x86/xsave: Using generic CPUID clearing when disabling XSAVE

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From: Andi Kleen <ak@linux.intel.com>

Now that the generic CPUID clearing understands dependencies,
it's enough to clear the XSAVE CPUID bit to clear all depending
features when XSAVE gets disabled.

So we don't need this hard to maintain explicit list
of features depending on XSAVE anymore. Just call the generic
clear_cpu_cap() function for XSAVE.

Signed-off-by: Andi Kleen <ak@linux.intel.com>
---
 arch/x86/kernel/fpu/xstate.c | 20 --------------------
 1 file changed, 20 deletions(-)

diff --git a/arch/x86/kernel/fpu/xstate.c b/arch/x86/kernel/fpu/xstate.c
index 8f0b96320cc9..73c4fda76d32 100644
--- a/arch/x86/kernel/fpu/xstate.c
+++ b/arch/x86/kernel/fpu/xstate.c
@@ -73,26 +73,6 @@ unsigned int fpu_user_xstate_size;
 void fpu__xstate_clear_all_cpu_caps(void)
 {
 	setup_clear_cpu_cap(X86_FEATURE_XSAVE);
-	setup_clear_cpu_cap(X86_FEATURE_XSAVEOPT);
-	setup_clear_cpu_cap(X86_FEATURE_XSAVEC);
-	setup_clear_cpu_cap(X86_FEATURE_XSAVES);
-	setup_clear_cpu_cap(X86_FEATURE_AVX);
-	setup_clear_cpu_cap(X86_FEATURE_AVX2);
-	setup_clear_cpu_cap(X86_FEATURE_AVX512F);
-	setup_clear_cpu_cap(X86_FEATURE_AVX512IFMA);
-	setup_clear_cpu_cap(X86_FEATURE_AVX512PF);
-	setup_clear_cpu_cap(X86_FEATURE_AVX512ER);
-	setup_clear_cpu_cap(X86_FEATURE_AVX512CD);
-	setup_clear_cpu_cap(X86_FEATURE_AVX512DQ);
-	setup_clear_cpu_cap(X86_FEATURE_AVX512BW);
-	setup_clear_cpu_cap(X86_FEATURE_AVX512VL);
-	setup_clear_cpu_cap(X86_FEATURE_MPX);
-	setup_clear_cpu_cap(X86_FEATURE_XGETBV1);
-	setup_clear_cpu_cap(X86_FEATURE_AVX512VBMI);
-	setup_clear_cpu_cap(X86_FEATURE_PKU);
-	setup_clear_cpu_cap(X86_FEATURE_AVX512_4VNNIW);
-	setup_clear_cpu_cap(X86_FEATURE_AVX512_4FMAPS);
-	setup_clear_cpu_cap(X86_FEATURE_AVX512_VPOPCNTDQ);
 }
 
 /*
-- 
2.9.4

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Thread

Support generic disabling of all XSAVE features Andi Kleen <andi@firstfloor.org> - 2017-06-08 01:40 +0200
  [PATCH v2 5/5] x86/xsave: Using generic CPUID clearing when disabling XSAVE Andi Kleen <andi@firstfloor.org> - 2017-06-08 01:40 +0200
  [PATCH v2 4/5] x86/xsave: Make XSAVE check the base CPUID features before enabling Andi Kleen <andi@firstfloor.org> - 2017-06-08 01:40 +0200
  Re: Support generic disabling of all XSAVE features Andi Kleen <andi@firstfloor.org> - 2017-06-13 02:20 +0200

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