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x86 atomic instructions are used for um on UML_X86, therefore atomics on UML_X86 support native atomic RmW as x86 does, hence select ARCH_SUPPORTS_ATOMIC_RMW. Reviewed-by: FUJITA Tomonori <fujita.tomonori@gmail.com> Acked-by: Richard Weinberger <richard@nod.at> Signed-off-by: Boqun Feng <boqun.feng@gmail.com> Link: https://patch.msgid.link/20260106034034.60074-1-boqun.feng@gmail.com
40 lines
778 B
Plaintext
40 lines
778 B
Plaintext
# SPDX-License-Identifier: GPL-2.0
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menu "Host processor type and features"
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source "arch/x86/Kconfig.cpu"
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endmenu
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config UML_X86
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def_bool y
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select ARCH_USE_QUEUED_RWLOCKS
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select ARCH_SUPPORTS_ATOMIC_RMW
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select ARCH_USE_QUEUED_SPINLOCKS
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select DCACHE_WORD_ACCESS
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select HAVE_EFFICIENT_UNALIGNED_ACCESS
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select UML_SUBARCH_SUPPORTS_SMP if X86_CX8
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config 64BIT
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bool "64-bit kernel" if "$(SUBARCH)" = "x86"
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default "$(SUBARCH)" != "i386"
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config X86_32
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def_bool !64BIT
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select ARCH_32BIT_OFF_T
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select ARCH_WANT_IPC_PARSE_VERSION
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select MODULES_USE_ELF_REL
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select CLONE_BACKWARDS
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select OLD_SIGSUSPEND3
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select OLD_SIGACTION
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config X86_64
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def_bool 64BIT
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select MODULES_USE_ELF_RELA
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config ARCH_HAS_SC_SIGNALS
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def_bool !64BIT
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config GENERIC_HWEIGHT
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def_bool y
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