[PATCH v9 5/5] KVM: arm64: Introduce the PTDUMP_STAGE2_DEBUGFS config

From: Sebastian Ene
Date: Tue Aug 27 2024 - 04:47:30 EST


When this config is enabled, it exposes the stage-2 pagetable layout
through a debugfs file.

Signed-off-by: Sebastian Ene <sebastianene@xxxxxxxxxx>
---
arch/arm64/kvm/Kconfig | 17 +++++++++++++++++
1 file changed, 17 insertions(+)

diff --git a/arch/arm64/kvm/Kconfig b/arch/arm64/kvm/Kconfig
index 8304eb342be9..ead632ad01b4 100644
--- a/arch/arm64/kvm/Kconfig
+++ b/arch/arm64/kvm/Kconfig
@@ -66,4 +66,21 @@ config PROTECTED_NVHE_STACKTRACE

If unsure, or not using protected nVHE (pKVM), say N.

+config PTDUMP_STAGE2_DEBUGFS
+ bool "Present the stage-2 pagetables to debugfs"
+ depends on KVM
+ depends on DEBUG_KERNEL
+ depends on DEBUG_FS
+ depends on GENERIC_PTDUMP
+ select PTDUMP_CORE
+ default n
+ help
+ Say Y here if you want to show the stage-2 kernel pagetables
+ layout in a debugfs file. This information is only useful for kernel developers
+ who are working in architecture specific areas of the kernel.
+ It is probably not a good idea to enable this feature in a production
+ kernel.
+
+ If in doubt, say N.
+
endif # VIRTUALIZATION
--
2.46.0.295.g3b9ea8a38a-goog