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

[Tyler Hicks]

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;
-- 
2.7.4