From: David Kaplan Date: Mon, 7 Jul 2025 18:32:58 +0000 (-0500) Subject: x86/Kconfig: Add arch attack vector support X-Git-Tag: io_uring-6.17-20250808~21^2~18 X-Git-Url: https://git.kernel.dk/?a=commitdiff_plain;h=735e59204b5eb5aa55ba64be5d8ff4223b197816;p=linux-block.git x86/Kconfig: Add arch attack vector support ARCH_HAS_CPU_ATTACK_VECTORS should be set for architectures which implement the new attack-vector based controls for CPU mitigations. If an arch does not support attack-vector based controls then an attempt to use them results in a warning. Signed-off-by: David Kaplan Signed-off-by: Borislav Petkov (AMD) Link: https://lore.kernel.org/20250707183316.1349127-4-david.kaplan@amd.com --- diff --git a/arch/Kconfig b/arch/Kconfig index a3308a220f86..7d8a4e7066a6 100644 --- a/arch/Kconfig +++ b/arch/Kconfig @@ -1763,4 +1763,7 @@ config ARCH_WANTS_PRE_LINK_VMLINUX An architecture can select this if it provides arch//tools/Makefile with .arch.vmlinux.o target to be linked into vmlinux. +config ARCH_HAS_CPU_ATTACK_VECTORS + bool + endmenu diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig index 71dfe7d7c786..6c20adb0fe7c 100644 --- a/arch/x86/Kconfig +++ b/arch/x86/Kconfig @@ -75,6 +75,7 @@ config X86 select ARCH_ENABLE_SPLIT_PMD_PTLOCK if (PGTABLE_LEVELS > 2) && (X86_64 || X86_PAE) select ARCH_ENABLE_THP_MIGRATION if X86_64 && TRANSPARENT_HUGEPAGE select ARCH_HAS_ACPI_TABLE_UPGRADE if ACPI + select ARCH_HAS_CPU_ATTACK_VECTORS if CPU_MITIGATIONS select ARCH_HAS_CACHE_LINE_SIZE select ARCH_HAS_CPU_CACHE_INVALIDATE_MEMREGION select ARCH_HAS_CPU_FINALIZE_INIT