This is a note to let you know that I've just added the patch titled

x86/microcode/AMD: Add support for fam17h microcode loading

to the 4.4-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git%3Ba=su...

The filename of the patch is: x86-microcode-amd-add-support-for-fam17h-microcode-loading.patch and it can be found in the queue-4.4 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree, please let stable@vger.kernel.org know about it.

From f4e9b7af0cd58dd039a0fb2cd67d57cea4889abf Mon Sep 17 00:00:00 2001

From: Tom Lendacky thomas.lendacky@amd.com Date: Thu, 30 Nov 2017 16:46:40 -0600 Subject: x86/microcode/AMD: Add support for fam17h microcode loading

From: Tom Lendacky thomas.lendacky@amd.com

commit f4e9b7af0cd58dd039a0fb2cd67d57cea4889abf upstream.

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@amd.com Signed-off-by: Thomas Gleixner tglx@linutronix.de Reviewed-by: Borislav Petkov bp@alien8.de Link: https://lkml.kernel.org/r/20171130224640.15391.40247.stgit@tlendack-t1.amdof... Signed-off-by: Ingo Molnar mingo@kernel.org Cc: Alice Ferrazzi alicef@gentoo.org Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org

--- arch/x86/kernel/cpu/microcode/amd.c | 4 ++++ 1 file changed, 4 insertions(+)

--- a/arch/x86/kernel/cpu/microcode/amd.c +++ b/arch/x86/kernel/cpu/microcode/amd.c @@ -580,6 +580,7 @@ static unsigned int verify_patch_size(u8 #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: @@ -591,6 +592,9 @@ static unsigned int verify_patch_size(u8 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;

Patches currently in stable-queue which might be from thomas.lendacky@amd.com are

queue-4.4/x86-microcode-amd-add-support-for-fam17h-microcode-loading.patch