Re: [PATCH 4.19] x86/CPU/AMD: Fix disabling XSAVES on AMD family 0x17 due to erratum

[Greg Kroah-Hartman <gregkh@linuxfoundation.org>]

On Thu, Jan 25, 2024 at 07:06:54PM +0100, Maciej S. Szmigiero wrote:
> From: "Maciej S. Szmigiero" <maciej.szmigiero@oracle.com>
> 
> The stable kernel version backport of the patch disabling XSAVES on AMD
> Zen family 0x17 applied this change to the wrong function (init_amd_k6()),
> one which isn't called for Zen CPUs.
> 
> Move the erratum to the init_amd_zn() function instead.
> 
> Add an explicit family 0x17 check to the erratum so nothing will break if
> someone naively makes this kernel version call init_amd_zn() also for
> family 0x19 in the future (as the current upstream code does).
> 
> Fixes: f028a7db9824 ("x86/CPU/AMD: Disable XSAVES on AMD family 0x17")
> Signed-off-by: Maciej S. Szmigiero <maciej.szmigiero@oracle.com>
> ---
>  arch/x86/kernel/cpu/amd.c | 20 +++++++++++---------
>  1 file changed, 11 insertions(+), 9 deletions(-)
> 

Both fixes now queued up, thanks.

greg k-h