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x86/percpu: Enable named address spaces with known compiler version

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Enable named address spaces with known compiler versions
(GCC 12.1 and later) in order to avoid possible issues with named
address spaces with older compilers. Set CC_HAS_NAMED_AS when the
compiler satisfies version requirements and set USE_X86_SEG_SUPPORT
to signal when segment qualifiers could be used.

Signed-off-by: Uros Bizjak <ubizjak@gmail.com>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Cc: Andy Lutomirski <luto@kernel.org>
Cc: Brian Gerst <brgerst@gmail.com>
Cc: Denys Vlasenko <dvlasenk@redhat.com>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Josh Poimboeuf <jpoimboe@redhat.com>
Link: https://lore.kernel.org/r/20231004145137.86537-3-ubizjak@gmail.com
This commit is contained in:
Uros Bizjak
2023-10-04 16:49:42 +02:00
committed by Ingo Molnar
parent 8ae292c66d
commit 1ca3683cc6
1 changed files with 7 additions and 0 deletions
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7
arch/x86/Kconfig
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@@ -2388,6 +2388,13 @@ source "kernel/livepatch/Kconfig"
endmenu
config CC_HAS_NAMED_AS
def_bool CC_IS_GCC && GCC_VERSION >= 120100
config USE_X86_SEG_SUPPORT
def_bool y
depends on CC_HAS_NAMED_AS && SMP
config CC_HAS_SLS
def_bool $(cc-option,-mharden-sls=all)