linux-kernel - [tip:x86/urgent] x86/microcode/AMD: Add support for fam17h microcode loading

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Message-ID: <tip-f4e9b7af0cd58dd039a0fb2cd67d57cea4889abf@git.kernel.org>
Date:   Wed, 6 Dec 2017 03:35:20 -0800
From:   tip-bot for Tom Lendacky <tipbot@...or.com>
To:     linux-tip-commits@...r.kernel.org
Cc:     mingo@...nel.org, tglx@...utronix.de, bp@...en8.de,
        thomas.lendacky@....com, linux-kernel@...r.kernel.org,
        hpa@...or.com
Subject: [tip:x86/urgent] x86/microcode/AMD: Add support for fam17h
 microcode loading

Commit-ID:  f4e9b7af0cd58dd039a0fb2cd67d57cea4889abf
Gitweb:     https://git.kernel.org/tip/f4e9b7af0cd58dd039a0fb2cd67d57cea4889abf
Author:     Tom Lendacky <thomas.lendacky@....com>
AuthorDate: Thu, 30 Nov 2017 16:46:40 -0600
Committer:  Ingo Molnar <mingo@...nel.org>
CommitDate: Wed, 6 Dec 2017 12:27:24 +0100

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

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@....com>
Signed-off-by: Thomas Gleixner <tglx@...utronix.de>
Reviewed-by: Borislav Petkov <bp@...en8.de>
Link: https://lkml.kernel.org/r/20171130224640.15391.40247.stgit@tlendack-t1.amdoffice.net
Signed-off-by: Ingo Molnar <mingo@...nel.org>
---
 arch/x86/kernel/cpu/microcode/amd.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/arch/x86/kernel/cpu/microcode/amd.c b/arch/x86/kernel/cpu/microcode/amd.c
index c6daec4..330b846 100644
--- a/arch/x86/kernel/cpu/microcode/amd.c
+++ b/arch/x86/kernel/cpu/microcode/amd.c
@@ -470,6 +470,7 @@ 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:
@@ -481,6 +482,9 @@ 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;