Documentation: Move L1TF to separate directory

commit 65fd4cb65b2dad97feb8330b6690445910b56d6a upstream.

Move L!TF to a separate directory so the MDS stuff can be added at the
side. Otherwise the all hardware vulnerabilites have their own top level
entry. Should have done that right away.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Reviewed-by: Jon Masters <jcm@redhat.com>
[bwh: Backported to 4.9: adjust filenames, context]
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

7 files changed, 24 insertions, 6 deletions

diff --git a/Documentation/ABI/testing/sysfs-devices-system-cpu b/Documentation/ABI/testing/sysfs-devices-system-cpu
index b4ba4f1..1f5d22b 100644
--- a/Documentation/ABI/testing/sysfs-devices-system-cpu
+++ b/Documentation/ABI/testing/sysfs-devices-system-cpu
@@ -371,7 +371,7 @@ Description:	Information about CPU vulnerabilities
 		"Mitigation: $M"  CPU is affected and mitigation $M is in effect
 
 		Details about the l1tf file can be found in
-		Documentation/admin-guide/l1tf.rst
+		Documentation/hw-vuln/l1tf.rst
 
 What:		/sys/devices/system/cpu/smt
 		/sys/devices/system/cpu/smt/active
diff --git a/Documentation/hw-vuln/index.rst b/Documentation/hw-vuln/index.rst
new file mode 100644
index 0000000..8ce2009
--- a/dev/null
+++ b/Documentation/hw-vuln/index.rst
@@ -0,0 +1,12 @@
+========================
+Hardware vulnerabilities
+========================
+
+This section describes CPU vulnerabilities and provides an overview of the
+possible mitigations along with guidance for selecting mitigations if they
+are configurable at compile, boot or run time.
+
+.. toctree::
+   :maxdepth: 1
+
+   l1tf
diff --git a/Documentation/l1tf.rst b/Documentation/hw-vuln/l1tf.rst
index 9af9773..9af9773 100644
--- a/Documentation/l1tf.rst
+++ b/Documentation/hw-vuln/l1tf.rst
diff --git a/Documentation/index.rst b/Documentation/index.rst
index 18b2484..f95c58d 100644
--- a/Documentation/index.rst
+++ b/Documentation/index.rst
@@ -12,7 +12,6 @@ Contents:
    :maxdepth: 2
 
    kernel-documentation
-   l1tf
    development-process/index
    dev-tools/tools
    driver-api/index
@@ -20,6 +19,13 @@ Contents:
    gpu/index
    80211/index
 
+This section describes CPU vulnerabilities and their mitigations.
+
+.. toctree::
+   :maxdepth: 1
+
+   hw-vuln/index
+
 Architecture-specific documentation
 -----------------------------------
 
diff --git a/Documentation/kernel-parameters.txt b/Documentation/kernel-parameters.txt
index 3dcc0af..12c33e5 100644
--- a/Documentation/kernel-parameters.txt
+++ b/Documentation/kernel-parameters.txt
@@ -2082,7 +2082,7 @@ bytes respectively. Such letter suffixes can also be entirely omitted.
 
 			Default is 'flush'.
 
-			For details see: Documentation/admin-guide/l1tf.rst
+			For details see: Documentation/hw-vuln/l1tf.rst
 
 	l2cr=		[PPC]
 
diff --git a/arch/x86/kernel/cpu/bugs.c b/arch/x86/kernel/cpu/bugs.c
index 1d6b7e9..e0c77a4 100644
--- a/arch/x86/kernel/cpu/bugs.c
+++ b/arch/x86/kernel/cpu/bugs.c
@@ -1097,7 +1097,7 @@ static void __init l1tf_select_mitigation(void)
 		pr_info("You may make it effective by booting the kernel with mem=%llu parameter.\n",
 				half_pa);
 		pr_info("However, doing so will make a part of your RAM unusable.\n");
-		pr_info("Reading https://www.kernel.org/doc/html/latest/admin-guide/l1tf.html might help you decide.\n");
+		pr_info("Reading https://www.kernel.org/doc/html/latest/admin-guide/hw-vuln/l1tf.html might help you decide.\n");
 		return;
 	}
 
diff --git a/arch/x86/kvm/vmx.c b/arch/x86/kvm/vmx.c
index 5e44c25..8feb4f7 100644
--- a/arch/x86/kvm/vmx.c
+++ b/arch/x86/kvm/vmx.c
@@ -9569,8 +9569,8 @@ free_vcpu:
 	return ERR_PTR(err);
 }
 
-#define L1TF_MSG_SMT "L1TF CPU bug present and SMT on, data leak possible. See CVE-2018-3646 and https://www.kernel.org/doc/html/latest/admin-guide/l1tf.html for details.\n"
-#define L1TF_MSG_L1D "L1TF CPU bug present and virtualization mitigation disabled, data leak possible. See CVE-2018-3646 and https://www.kernel.org/doc/html/latest/admin-guide/l1tf.html for details.\n"
+#define L1TF_MSG_SMT "L1TF CPU bug present and SMT on, data leak possible. See CVE-2018-3646 and https://www.kernel.org/doc/html/latest/admin-guide/hw-vuln/l1tf.html for details.\n"
+#define L1TF_MSG_L1D "L1TF CPU bug present and virtualization mitigation disabled, data leak possible. See CVE-2018-3646 and https://www.kernel.org/doc/html/latest/admin-guide/hw-vuln/l1tf.html for details.\n"
 
 static int vmx_vm_init(struct kvm *kvm)
 {