[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]
Message-ID: <20250310164023.779191-20-david.kaplan@amd.com>
Date: Mon, 10 Mar 2025 11:40:06 -0500
From: David Kaplan <david.kaplan@....com>
To: Thomas Gleixner <tglx@...utronix.de>, Borislav Petkov <bp@...en8.de>,
Peter Zijlstra <peterz@...radead.org>, Josh Poimboeuf <jpoimboe@...nel.org>,
Pawan Gupta <pawan.kumar.gupta@...ux.intel.com>, Ingo Molnar
<mingo@...hat.com>, Dave Hansen <dave.hansen@...ux.intel.com>,
<x86@...nel.org>, "H . Peter Anvin" <hpa@...or.com>
CC: <linux-kernel@...r.kernel.org>, Brendan Jackman <jackmanb@...gle.com>,
Derek Manwaring <derekmn@...zon.com>
Subject: [PATCH v4 19/36] x86/Kconfig: 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 <david.kaplan@....com>
---
arch/Kconfig | 3 +++
arch/x86/Kconfig | 1 +
2 files changed, 4 insertions(+)
diff --git a/arch/Kconfig b/arch/Kconfig
index 9f6eb09ef12d..cfa65367a08b 100644
--- a/arch/Kconfig
+++ b/arch/Kconfig
@@ -1748,4 +1748,7 @@ config ARCH_WANTS_PRE_LINK_VMLINUX
An architecture can select this if it provides arch/<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 1665ebaba251..cb1c03021683 100644
--- a/arch/x86/Kconfig
+++ b/arch/x86/Kconfig
@@ -72,6 +72,7 @@ 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
--
2.34.1
Powered by blists - more mailing lists