From bcc9d04e749a8cbdbe1b26285f0f69e315c70821 Mon Sep 17 00:00:00 2001 From: Mark Brown Date: Tue, 1 Oct 2024 23:58:40 +0100 Subject: mm: Introduce ARCH_HAS_USER_SHADOW_STACK Since multiple architectures have support for shadow stacks and we need to select support for this feature in several places in the generic code provide a generic config option that the architectures can select. Suggested-by: David Hildenbrand Acked-by: David Hildenbrand Reviewed-by: Deepak Gupta Reviewed-by: Rick Edgecombe Reviewed-by: Mike Rapoport (IBM) Reviewed-by: Catalin Marinas Reviewed-by: Kees Cook Tested-by: Kees Cook Acked-by: Shuah Khan Reviewed-by: Thiago Jung Bauermann Signed-off-by: Mark Brown Link: https://lore.kernel.org/r/20241001-arm64-gcs-v13-1-222b78d87eee@kernel.org Signed-off-by: Catalin Marinas --- mm/Kconfig | 6 ++++++ 1 file changed, 6 insertions(+) (limited to 'mm') diff --git a/mm/Kconfig b/mm/Kconfig index 4c9f5ea13271..4b2a1ef9a161 100644 --- a/mm/Kconfig +++ b/mm/Kconfig @@ -1296,6 +1296,12 @@ config NUMA_EMU into virtual nodes when booted with "numa=fake=N", where N is the number of nodes. This is only useful for debugging. +config ARCH_HAS_USER_SHADOW_STACK + bool + help + The architecture has hardware support for userspace shadow call + stacks (eg, x86 CET, arm64 GCS or RISC-V Zicfiss). + source "mm/damon/Kconfig" endmenu -- cgit v1.2.3