[Acked] [PATCH][SRU][T] x86/microcode/AMD: Add support for fam17h microcode loading

[Andy Whitcroft]

On Wed, May 30, 2018 at 04:32:32AM +0000, Tyler Hicks wrote:
> From: Tom Lendacky <thomas.lendacky at amd.com>
> 
> BugLink: https://launchpad.net/bugs/1774082
> 
> The size for the Microcode Patch Block (MPB) for an AMD family 17h
> processor is 3200 bytes.  Add a #define for fam17h so that it does
> not default to 2048 bytes and fail a microcode load/update.
> 
> Signed-off-by: Tom Lendacky <thomas.lendacky at amd.com>
> Signed-off-by: Thomas Gleixner <tglx at linutronix.de>
> Reviewed-by: Borislav Petkov <bp at alien8.de>
> Link: https://lkml.kernel.org/r/20171130224640.15391.40247.stgit@tlendack-t1.amdoffice.net
> Signed-off-by: Ingo Molnar <mingo at kernel.org>
> (backported from commit f4e9b7af0cd58dd039a0fb2cd67d57)
> [tyhicks: Adjust the patched file path]
> Signed-off-by: Tyler Hicks <tyhicks at canonical.com>
> ---
>  arch/x86/kernel/microcode_amd.c | 4 ++++
>  1 file changed, 4 insertions(+)
> 
> diff --git a/arch/x86/kernel/microcode_amd.c b/arch/x86/kernel/microcode_amd.c
> index c3d4cc972eca..09b9cafb216e 100644
> --- a/arch/x86/kernel/microcode_amd.c
> +++ b/arch/x86/kernel/microcode_amd.c
> @@ -154,6 +154,7 @@ static unsigned int verify_patch_size(u8 family, u32 patch_size,
>  #define F14H_MPB_MAX_SIZE 1824
>  #define F15H_MPB_MAX_SIZE 4096
>  #define F16H_MPB_MAX_SIZE 3458
> +#define F17H_MPB_MAX_SIZE 3200
>  
>  	switch (family) {
>  	case 0x14:
> @@ -165,6 +166,9 @@ static unsigned int verify_patch_size(u8 family, u32 patch_size,
>  	case 0x16:
>  		max_size = F16H_MPB_MAX_SIZE;
>  		break;
> +	case 0x17:
> +		max_size = F17H_MPB_MAX_SIZE;
> +		break;
>  	default:
>  		max_size = F1XH_MPB_MAX_SIZE;
>  		break;

Looks to do what is claimed.

Acked-by: Andy Whitcroft <apw at canonical.com>

-apw