From: Dave Hansen <dave.hansen@linux.intel.com>
To: linux-kernel@vger.kernel.org
Cc: x86@kernel.org,tglx@linutronix.de,bp@alien8.de,rafael@kernel.org,lenb@kernel.org,dave.jiang@intel.com,irenic.rajneesh@gmail.com,david.e.box@intel.com,Dave
Hansen <dave.hansen@linux.intel.com>
Subject: [PATCH 09/10] x86/fpu: Remove unnecessary CPUID level check
Date: Fri, 13 Dec 2024 12:50:38 -0800 [thread overview]
Message-ID: <20241213205038.6E71F9A4@davehans-spike.ostc.intel.com> (raw)
In-Reply-To: <20241213205026.25B1D283@davehans-spike.ostc.intel.com>
From: Dave Hansen <dave.hansen@linux.intel.com>
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>
---
b/arch/x86/kernel/fpu/xstate.c | 5 -----
1 file changed, 5 deletions(-)
diff -puN arch/x86/kernel/fpu/xstate.c~xsave-leaf-checks-2 arch/x86/kernel/fpu/xstate.c
--- a/arch/x86/kernel/fpu/xstate.c~xsave-leaf-checks-2 2024-12-13 12:45:36.903226562 -0800
+++ b/arch/x86/kernel/fpu/xstate.c 2024-12-13 12:45:36.907226732 -0800
@@ -764,11 +764,6 @@ void __init fpu__init_system_xstate(unsi
return;
}
- if (boot_cpu_data.cpuid_level < XSTATE_CPUID) {
- WARN_ON_FPU(1);
- return;
- }
-
/*
* Find user xstates supported by the processor.
*/
_
next prev parent reply other threads:[~2024-12-13 20:50 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-12-13 20:50 [PATCH 00/10] [v2] x86/cpu: Centralize and standardize CPUID leaf naming Dave Hansen
2024-12-13 20:50 ` [PATCH 01/10] x86/cpu: Move MWAIT leaf definition to common header Dave Hansen
2024-12-13 20:50 ` [PATCH 02/10] x86/cpu: Use MWAIT leaf definition Dave Hansen
2024-12-13 20:50 ` [PATCH 03/10] x86/cpu: Remove unnecessary MwAIT leaf checks Dave Hansen
2024-12-13 20:50 ` [PATCH 04/10] x86/cpu: Refresh DCA leaf reading code Dave Hansen
2024-12-13 20:50 ` [PATCH 05/10] x86/cpu: Move TSC CPUID leaf definition Dave Hansen
2024-12-13 20:50 ` [PATCH 06/10] x86/tsc: Move away from TSC leaf magic numbers Dave Hansen
2024-12-13 20:50 ` [PATCH 07/10] x86/tsc: Remove CPUID "frequency" " Dave Hansen
2024-12-13 20:50 ` [PATCH 08/10] x86/fpu: Move CPUID leaf definitions to common code Dave Hansen
2024-12-13 20:50 ` Dave Hansen [this message]
2024-12-16 19:05 ` [PATCH 09/10] x86/fpu: Remove unnecessary CPUID level check Chang S. Bae
2024-12-16 21:23 ` Dave Hansen
2024-12-13 20:50 ` [PATCH 10/10] x86/cpu: Make all all CPUID leaf names consistent Dave Hansen
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