x86/cpu: Make CONFIG_X86_CX8 unconditional

I.e. from now on it's a boot time requirement for the CPU to support it.

( This was preceded by the removal of all non-CX8 platform build
  options, so it should have no functional effects in theory. )

Signed-off-by: Ingo Molnar <mingo@kernel.org>
Reviewed-by: Arnd Bergmann <arnd@arndb.de>
Acked-by: Dave Hansen <dave.hansen@linux.intel.com>
Cc: Ahmed S . Darwish <darwi@linutronix.de>
Cc: Andrew Cooper <andrew.cooper3@citrix.com>
Cc: Ard Biesheuvel <ardb@kernel.org>
Cc: H . Peter Anvin <hpa@zytor.com>
Cc: John Ogness <john.ogness@linutronix.de>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: https://lore.kernel.org/r/20250425084216.3913608-14-mingo@kernel.org

diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig
index f4b8722ba1064bf62ff7f4b73e80cde280bbed17..bd548dc1df5c184bcce4dffd0fb53744cf7b7860 100644 (file)
--- a/arch/x86/Kconfig
+++ b/arch/x86/Kconfig
@@ -133,7 +133,7 @@ config X86
        select ARCH_SUPPORTS_AUTOFDO_CLANG
        select ARCH_SUPPORTS_PROPELLER_CLANG    if X86_64
        select ARCH_USE_BUILTIN_BSWAP
-       select ARCH_USE_CMPXCHG_LOCKREF         if X86_CX8
+       select ARCH_USE_CMPXCHG_LOCKREF
        select ARCH_USE_MEMTEST
        select ARCH_USE_QUEUED_RWLOCKS
        select ARCH_USE_QUEUED_SPINLOCKS

diff --git a/arch/x86/Kconfig.cpu b/arch/x86/Kconfig.cpu
index 678fdc10daef21a38cd25c19ee93acf339142963..66111446624b8ab04fb4f2584544d567d5ee7eaf 100644 (file)
--- a/arch/x86/Kconfig.cpu
+++ b/arch/x86/Kconfig.cpu
@@ -269,7 +269,6 @@ config X86_HAVE_PAE
 
 config X86_CX8
        def_bool y
-       depends on X86_HAVE_PAE || M586TSC || M586MMX || MK6 || MK7 || MGEODEGX1 || MGEODE_LX
 
 # this should be set for all -march=.. options where the compiler
 # generates cmov.

diff --git a/arch/x86/Kconfig.cpufeatures b/arch/x86/Kconfig.cpufeatures
index 89cbf8f572aeec02b13866714aa6bfd220dc1c79..09833c88f9ff46853f05f4399a693579e702eb88 100644 (file)
--- a/arch/x86/Kconfig.cpufeatures
+++ b/arch/x86/Kconfig.cpufeatures
@@ -42,7 +42,6 @@ config X86_REQUIRED_FEATURE_NOPL
 
 config X86_REQUIRED_FEATURE_CX8
        def_bool y
-       depends on X86_CX8
 
 # this should be set for all -march=.. options where the compiler
 # generates cmov.