[PATCH v2 stable v4.4 2/2] Documentation: Add nospectre_v1 parameter
Greg KH
gregkh at linuxfoundation.org
Tue Apr 30 23:25:23 AEST 2019
On Tue, Apr 30, 2019 at 03:42:27PM +0300, Diana Craciun wrote:
> commit 26cb1f36c43ee6e89d2a9f48a5a7500d5248f836 upstream.
>
> Currently only supported on powerpc.
>
> Signed-off-by: Diana Craciun <diana.craciun at nxp.com>
> Signed-off-by: Michael Ellerman <mpe at ellerman.id.au>
> ---
> Documentation/kernel-parameters.txt | 4 ++++
> 1 file changed, 4 insertions(+)
>
> diff --git a/Documentation/kernel-parameters.txt b/Documentation/kernel-parameters.txt
> index f0bdf78420a0..3ff87d5d6fea 100644
> --- a/Documentation/kernel-parameters.txt
> +++ b/Documentation/kernel-parameters.txt
> @@ -2449,6 +2449,10 @@ bytes respectively. Such letter suffixes can also be entirely omitted.
> legacy floating-point registers on task switch.
>
> 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
> --
> 2.17.1
>
Both of these patches needed to be added to a bunch of the stable trees,
so I've now done that.
thanks,
greg k-h
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