Re: [PATCH v2 stable v4.4 2/2] Documentation: Add nospectre_v1 parameter

[Greg KH <gregkh@linuxfoundation.org>]

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@nxp.com>
> Signed-off-by: Michael Ellerman <mpe@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