From: Dave Hansen <dave.hansen@linux.intel.com>
Date: Fri, 13 Dec 2024 20:50:38 +0000 (-0800)
Subject: x86/fpu: Remove unnecessary CPUID level check
X-Git-Tag: v6.14-rc1~190^2~1
X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=588e148d8babeb2fd863fb152b80548e18971caf;p=thirdparty%2Flinux.git

x86/fpu: Remove unnecessary CPUID level check

The CPUID level dependency table will entirely zap X86_FEATURE_XSAVE
if the CPUID level is too low.  This code is unreachable.  Kill it.

Signed-off-by: Dave Hansen <dave.hansen@linux.intel.com>
Reviewed-by: Chang S. Bae <chang.seok.bae@intel.com>
Link: https://lore.kernel.org/all/20241213205038.6E71F9A4%40davehans-spike.ostc.intel.com
---

diff --git a/arch/x86/kernel/fpu/xstate.c b/arch/x86/kernel/fpu/xstate.c
index bf38b3e754258..edacd34c1a228 100644
--- a/arch/x86/kernel/fpu/xstate.c
+++ b/arch/x86/kernel/fpu/xstate.c
@@ -764,11 +764,6 @@ void __init fpu__init_system_xstate(unsigned int legacy_size)
 		return;
 	}
 
-	if (boot_cpu_data.cpuid_level < XSTATE_CPUID) {
-		WARN_ON_FPU(1);
-		return;
-	}
-
 	/*
 	 * Find user xstates supported by the processor.
 	 */