linux-kernel - [PATCH 06/15] x86/cpu: Remove the CONFIG_X86_INVD

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Message-ID: <20250515085708.2510123-7-mingo@kernel.org>
Date: Thu, 15 May 2025 10:56:56 +0200
From: Ingo Molnar <mingo@...nel.org>
To: linux-kernel@...r.kernel.org
Cc: Ingo Molnar <mingo@...nel.org>,
	"Ahmed S . Darwish" <darwi@...utronix.de>,
	Andrew Cooper <andrew.cooper3@...rix.com>,
	Ard Biesheuvel <ardb@...nel.org>,
	Arnd Bergmann <arnd@...nel.org>,
	Borislav Petkov <bp@...en8.de>,
	Dave Hansen <dave.hansen@...ux.intel.com>,
	"H . Peter Anvin" <hpa@...or.com>,
	John Ogness <john.ogness@...utronix.de>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Peter Zijlstra <peterz@...radead.org>,
	Thomas Gleixner <tglx@...utronix.de>,
	Arnd Bergmann <arnd@...db.de>
Subject: [PATCH 06/15] x86/cpu: Remove the CONFIG_X86_INVD_BUG quirk

Now that support for 486 CPUs is gone, remove this
quirk as well.

Signed-off-by: Ingo Molnar <mingo@...nel.org>
Reviewed-by: Arnd Bergmann <arnd@...db.de>
Cc: Ahmed S . Darwish <darwi@...utronix.de>
Cc: Andrew Cooper <andrew.cooper3@...rix.com>
Cc: Ard Biesheuvel <ardb@...nel.org>
Cc: H . Peter Anvin <hpa@...or.com>
Cc: John Ogness <john.ogness@...utronix.de>
Cc: Linus Torvalds <torvalds@...ux-foundation.org>
Cc: Peter Zijlstra <peterz@...radead.org>
Link: https://lore.kernel.org/r/20250425084216.3913608-7-mingo@kernel.org
---
 arch/x86/Kconfig.cpu    | 4 ----
 arch/x86/kernel/traps.c | 7 -------
 2 files changed, 11 deletions(-)

diff --git a/arch/x86/Kconfig.cpu b/arch/x86/Kconfig.cpu
index abe4596ffa47..246a221c32e2 100644
--- a/arch/x86/Kconfig.cpu
+++ b/arch/x86/Kconfig.cpu
@@ -224,10 +224,6 @@ config X86_F00F_BUG
 	def_bool y
 	depends on M586MMX || M586TSC || M586
 
-config X86_INVD_BUG
-	def_bool y
-	depends on M486SX || M486
-
 config X86_ALIGNMENT_16
 	def_bool y
 	depends on MCYRIXIII || MK6 || M586MMX || M586TSC || M586 || MVIAC3_2 || MGEODEGX1
diff --git a/arch/x86/kernel/traps.c b/arch/x86/kernel/traps.c
index 94c0236963c6..8d08c58b3fe2 100644
--- a/arch/x86/kernel/traps.c
+++ b/arch/x86/kernel/traps.c
@@ -1346,13 +1346,6 @@ DEFINE_IDTENTRY(exc_coprocessor_error)
 
 DEFINE_IDTENTRY(exc_simd_coprocessor_error)
 {
-	if (IS_ENABLED(CONFIG_X86_INVD_BUG)) {
-		/* AMD 486 bug: INVD in CPL 0 raises #XF instead of #GP */
-		if (!static_cpu_has(X86_FEATURE_XMM)) {
-			__exc_general_protection(regs, 0);
-			return;
-		}
-	}
 	math_error(regs, X86_TRAP_XF);
 }
 
-- 
2.45.2