* [tip: x86/cpu] x86/fpu: Remove unnecessary CPUID level check
@ 2024-12-18 14:03 tip-bot2 for Dave Hansen
0 siblings, 0 replies; 2+ messages in thread
From: tip-bot2 for Dave Hansen @ 2024-12-18 14:03 UTC (permalink / raw)
To: linux-tip-commits; +Cc: Dave Hansen, Chang S. Bae, x86, linux-kernel
The following commit has been merged into the x86/cpu branch of tip:
Commit-ID: 74ccf55c81c96e0674d7b66bae98dabbce589d57
Gitweb: https://git.kernel.org/tip/74ccf55c81c96e0674d7b66bae98dabbce589d57
Author: Dave Hansen <dave.hansen@linux.intel.com>
AuthorDate: Fri, 13 Dec 2024 12:50:38 -08:00
Committer: Dave Hansen <dave.hansen@linux.intel.com>
CommitterDate: Wed, 18 Dec 2024 05:24:43 -08:00
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>
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
---
arch/x86/kernel/fpu/xstate.c | 5 -----
1 file changed, 5 deletions(-)
diff --git a/arch/x86/kernel/fpu/xstate.c b/arch/x86/kernel/fpu/xstate.c
index bf38b3e..edacd34 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.
*/
^ permalink raw reply [flat|nested] 2+ messages in thread
* [tip: x86/cpu] x86/fpu: Remove unnecessary CPUID level check
@ 2024-12-18 14:22 tip-bot2 for Dave Hansen
0 siblings, 0 replies; 2+ messages in thread
From: tip-bot2 for Dave Hansen @ 2024-12-18 14:22 UTC (permalink / raw)
To: linux-tip-commits; +Cc: Dave Hansen, Chang S. Bae, x86, linux-kernel
The following commit has been merged into the x86/cpu branch of tip:
Commit-ID: 588e148d8babeb2fd863fb152b80548e18971caf
Gitweb: https://git.kernel.org/tip/588e148d8babeb2fd863fb152b80548e18971caf
Author: Dave Hansen <dave.hansen@linux.intel.com>
AuthorDate: Fri, 13 Dec 2024 12:50:38 -08:00
Committer: Dave Hansen <dave.hansen@linux.intel.com>
CommitterDate: Wed, 18 Dec 2024 06:17:45 -08:00
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
---
arch/x86/kernel/fpu/xstate.c | 5 -----
1 file changed, 5 deletions(-)
diff --git a/arch/x86/kernel/fpu/xstate.c b/arch/x86/kernel/fpu/xstate.c
index bf38b3e..edacd34 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.
*/
^ permalink raw reply [flat|nested] 2+ messages in thread
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