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| author | Sebastian Ene <sebastianene@google.com> | 2024-09-09 15:47:21 +0300 |
|---|---|---|
| committer | Marc Zyngier <maz@kernel.org> | 2024-09-10 23:32:51 +0300 |
| commit | 7c4f73548ed15476daf1101f66648085eda65067 (patch) | |
| tree | bff6a61499f134c4c03039205afb99944af58614 /arch/arm64/include | |
| parent | 79c4c7284f92d5e780c8532c343ca2cacfaf5125 (diff) | |
| download | linux-7c4f73548ed15476daf1101f66648085eda65067.tar.xz | |
KVM: arm64: Register ptdump with debugfs on guest creation
While arch/*/mem/ptdump handles the kernel pagetable dumping code,
introduce KVM/ptdump to show the guest stage-2 pagetables. The
separation is necessary because most of the definitions from the
stage-2 pagetable reside in the KVM path and we will be invoking
functionality specific to KVM. Introduce the PTDUMP_STAGE2_DEBUGFS config.
When a guest is created, register a new file entry under the guest
debugfs dir which allows userspace to show the contents of the guest
stage-2 pagetables when accessed.
[maz: moved function prototypes from kvm_host.h to kvm_mmu.h]
Signed-off-by: Sebastian Ene <sebastianene@google.com>
Reviewed-by: Vincent Donnefort <vdonnefort@google.com>
Link: https://lore.kernel.org/r/20240909124721.1672199-6-sebastianene@google.com
Signed-off-by: Marc Zyngier <maz@kernel.org>
Diffstat (limited to 'arch/arm64/include')
| -rw-r--r-- | arch/arm64/include/asm/kvm_mmu.h | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/arch/arm64/include/asm/kvm_mmu.h b/arch/arm64/include/asm/kvm_mmu.h index 216ca424bb16..cd4087fbda9a 100644 --- a/arch/arm64/include/asm/kvm_mmu.h +++ b/arch/arm64/include/asm/kvm_mmu.h @@ -352,5 +352,11 @@ static inline bool kvm_is_nested_s2_mmu(struct kvm *kvm, struct kvm_s2_mmu *mmu) return &kvm->arch.mmu != mmu; } +#ifdef CONFIG_PTDUMP_STAGE2_DEBUGFS +void kvm_s2_ptdump_create_debugfs(struct kvm *kvm); +#else +static inline void kvm_s2_ptdump_create_debugfs(struct kvm *kvm) {} +#endif /* CONFIG_PTDUMP_STAGE2_DEBUGFS */ + #endif /* __ASSEMBLY__ */ #endif /* __ARM64_KVM_MMU_H__ */ |