From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-yb1-f202.google.com (mail-yb1-f202.google.com [209.85.219.202]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id D50A119DF5F for ; Tue, 27 Aug 2024 08:46:11 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.219.202 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1724748373; cv=none; b=bJqoci7lleCKv5pL3j9uiP96jojc9dR4MTm8wWiwdZCW9e3YFYkBb0kcYlFeolElVztJ6tzatC692oQc81LkYSNfnCGhdwhchm7HUdyG74luk0qLnOO6fa63cZgly8Fns1P5waE/xzsX8pi78uxmGvwAPBXgMbDOaKOJTYsKBg4= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1724748373; c=relaxed/simple; bh=W/gned1S2aEgveAzwGHcVts33uHXT+GTG81W6x5AeTc=; h=Date:In-Reply-To:Mime-Version:References:Message-ID:Subject:From: To:Cc:Content-Type; b=F4zCq//hxY2jJvR56xVXVUzPtKj32xemscU9W/cFYX+e7clzcpEpv005yuuXt0cSY+SA+PnfruQbThEk5w88483TEq6UCnnGaWWJZq2YXo3nRvEPSXsqUp28T96lw8lTrdhVFxaLgKFZlgn8iC2IKKY8tugLM6oSH7iLn1eZB0g= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=google.com; spf=pass smtp.mailfrom=flex--sebastianene.bounces.google.com; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b=0FNNyQJk; arc=none smtp.client-ip=209.85.219.202 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=google.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=flex--sebastianene.bounces.google.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b="0FNNyQJk" Received: by mail-yb1-f202.google.com with SMTP id 3f1490d57ef6-e035949cc4eso10158360276.1 for ; Tue, 27 Aug 2024 01:46:11 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20230601; t=1724748371; x=1725353171; darn=lists.linux.dev; h=cc:to:from:subject:message-id:references:mime-version:in-reply-to :date:from:to:cc:subject:date:message-id:reply-to; bh=ujfkbxajYNAV9coR+kUVXeI3lwos12vqL1v+iOvXT9g=; b=0FNNyQJkwMUIp7iYJm/RQ0vxKt3wZua7gtUaWQ9TgyC9aMVJR6drIhRxvYLsNGuA5f i/RGPZEPWvmvfu9ObjpqYgGDvrK4fwTIEas7kzzdVovH0TlOHg9EPWdd5OoXCn6t4FqA ir+CDEE8woKRKOKX5RbvxBmbTDR6OVskjyM8kOVSodFyAf5ry+WIZLTlcklv3gAW4sbU 3WxWVjE4nGt4S1Z4zUl7pM+uzWrMB68dQnnJ2Rr16PzIqEbbdItfrPmv0a/7WRZlNJn8 zuFBh1aHz6RadpkqCmc7wiSyyRaYmd8Ilq9kOqri4hfb0p2EGWwei1Rz/cXdshXX+GxS vEjw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1724748371; x=1725353171; h=cc:to:from:subject:message-id:references:mime-version:in-reply-to :date:x-gm-message-state:from:to:cc:subject:date:message-id:reply-to; bh=ujfkbxajYNAV9coR+kUVXeI3lwos12vqL1v+iOvXT9g=; b=gw2yi73+korUdeEOxL4digJvtXIwONpbBsoiRc3nchALbXpv2GZQ2JTQxYRGn0zHUt O5JjiHTJgD0thN2vgJF4GMqAdKqkwRw4Xfx+vJx9Bwory/b6LKbZvDjKi5tkYVl0qcGq NiicXV+Ydn9TVGEixgLV/n63fP5MnyEwYYKqs4KY/kFhEaY00+gf3W5qk5++XgNeIOjM MkLSc8gCv0+p4Z8tJo9EI9Em43+Cgp9n9lqc4X5jAZuLQEyxYrw9dI/phTkSlYMh3De/ Zq14X6SK4mHnW+1ti+CIKiWHaV3buRHjW5DswDnJa0y22JKRNXvWI2uGQT8t6ogryj9/ iKSg== X-Gm-Message-State: AOJu0YxxO8aBsxLO6OjWtm1B63Qq9OxefpRhaPZd7S5HUqM8o0FqY5DT nhWeqJzYWaPZs1elNiFcZUNnRb6muTyvhFuBMNDxtZleoR/C7gXjAaVMnIEVfbMavH0w1ziz7kl ckBYnPHGtaYTwTqax6XStCWpt3A== 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: kvmarm@lists.linux.dev 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-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 --- 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