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authorPeter Zijlstra <peterz@infradead.org>2021-11-15 17:46:39 +0100
committerPeter Zijlstra <peterz@infradead.org>2021-12-11 09:09:45 +0100
commitc6dbd3e5e69cf3ca47a3864115d4cbdd44619243 (patch)
tree1b0c415e73a50ff8f0e036856c325ceccf0db483 /tools/arch
parentbff8c3848e071d387d8b0784dc91fa49cd563774 (diff)
x86/mmx_32: Remove X86_USE_3DNOW
This code puts an exception table entry on the PREFETCH instruction to overwrite it with a JMP.d8 when it triggers an exception. Except of course, our code is no longer writable, also SMP. Instead of fixing this broken mess, simply take it out. Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Acked-by: Borislav Petkov <bp@suse.de> Link: https://lkml.kernel.org/r/YZKQzUmeNuwyvZpk@hirez.programming.kicks-ass.net
Diffstat (limited to 'tools/arch')
-rw-r--r--tools/arch/x86/include/asm/required-features.h4
1 files changed, 0 insertions, 4 deletions
diff --git a/tools/arch/x86/include/asm/required-features.h b/tools/arch/x86/include/asm/required-features.h
index b2d504f11937..aff774775c67 100644
--- a/tools/arch/x86/include/asm/required-features.h
+++ b/tools/arch/x86/include/asm/required-features.h
@@ -35,11 +35,7 @@
# define NEED_CMOV 0
#endif
-#ifdef CONFIG_X86_USE_3DNOW
-# define NEED_3DNOW (1<<(X86_FEATURE_3DNOW & 31))
-#else
# define NEED_3DNOW 0
-#endif
#if defined(CONFIG_X86_P6_NOP) || defined(CONFIG_X86_64)
# define NEED_NOPL (1<<(X86_FEATURE_NOPL & 31))