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AJvYcCX8uvB9QiV/wsQvSHzWOQ9PiUnccm9VEOGqN7tHhekkfoZaZpkUTtmpJoCU7nzJ02nLKz2ZHtlISXRuFKo=@vger.kernel.org X-Gm-Message-State: AOJu0Yyff28AgO5V8SoZGWCCzTLbCjTccvbe21OpAZUlgyHezlje/Q8c xCHU6O/SwRwkU/ofqnxNj6VxzTJoH6Zk/natNELfpd8fHwUfIcNBUcq7X7sSZuALkIkUxT8RW/3 en3Fboj6nokvq2p5tok6KoYW8nQ== X-Google-Smtp-Source: AGHT+IHOHuHbuOJF/L350TjQeQOZv00E2Fvna1Z8JsFoQh3TFmDrKS4V7q2AmDtj+RMoJ+girhVAzT4/oTPRZmzkCgA= X-Received: from sebkvm.c.googlers.com ([fda3:e722:ac3:cc00:28:9cb1:c0a8:cd5]) (user=sebastianene job=sendgmr) by 2002:a25:a4a2:0:b0:e16:6d88:b8c2 with SMTP id 3f1490d57ef6-e1a2a5a6addmr54600276.4.1724748370673; Tue, 27 Aug 2024 01:46:10 -0700 (PDT) Date: Tue, 27 Aug 2024 08:45:48 +0000 In-Reply-To: <20240827084549.45731-1-sebastianene@google.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: Mime-Version: 1.0 References: <20240827084549.45731-1-sebastianene@google.com> X-Mailer: git-send-email 2.46.0.295.g3b9ea8a38a-goog Message-ID: <20240827084549.45731-6-sebastianene@google.com> Subject: [PATCH v9 5/5] KVM: arm64: Introduce the PTDUMP_STAGE2_DEBUGFS config From: Sebastian Ene To: akpm@linux-foundation.org, alexghiti@rivosinc.com, ankita@nvidia.com, ardb@kernel.org, catalin.marinas@arm.com, christophe.leroy@csgroup.eu, james.morse@arm.com, vdonnefort@google.com, mark.rutland@arm.com, maz@kernel.org, oliver.upton@linux.dev, rananta@google.com, ryan.roberts@arm.com, sebastianene@google.com, shahuang@redhat.com, suzuki.poulose@arm.com, will@kernel.org, yuzenghui@huawei.com Cc: kvmarm@lists.linux.dev, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, kernel-team@android.com Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" When this config is enabled, it exposes the stage-2 pagetable layout through a debugfs file. Signed-off-by: Sebastian Ene Reviewed-by: Vincent Donnefort --- 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 =20 If unsure, or not using protected nVHE (pKVM), say N. =20 +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 de= velopers + 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 --=20 2.46.0.295.g3b9ea8a38a-goog