Documentation: Add nospectre_v1 parameter

commit 26cb1f36c43ee6e89d2a9f48a5a7500d5248f836 upstream.

Currently only supported on powerpc.

Signed-off-by: Diana Craciun <diana.craciun@nxp.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/Documentation/kernel-parameters.txt b/Documentation/kernel-parameters.txt
index f0bdf78..ef729a1 100644 (file)
--- a/Documentation/kernel-parameters.txt
+++ b/Documentation/kernel-parameters.txt
@@ -2450,6 +2450,10 @@ bytes respectively. Such letter suffixes can also be entirely omitted.
 
        nohugeiomap     [KNL,x86] Disable kernel huge I/O mappings.
 
+       nospectre_v1    [PPC] Disable mitigations for Spectre Variant 1 (bounds
+                       check bypass). With this option data leaks are possible
+                       in the system.
+
        nospectre_v2    [X86,PPC_FSL_BOOK3E] Disable all mitigations for the Spectre variant 2
                        (indirect branch prediction) vulnerability. System may
                        allow data leaks with this option, which is equivalent