[PATCH 4.14 32/38] x86/microcode/AMD: Add support for fam17h microcode loading

From: Greg Kroah-Hartman
Date: Mon Jan 08 2018 - 08:01:00 EST


4.14-stable review patch. If anyone has any objections, please let me know.

------------------

From: Tom Lendacky <thomas.lendacky@xxxxxxx>

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@xxxxxxx>
Signed-off-by: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
Reviewed-by: Borislav Petkov <bp@xxxxxxxxx>
Link: https://lkml.kernel.org/r/20171130224640.15391.40247.stgit@xxxxxxxxxxxxxxxxxxxxxxxxx
Signed-off-by: Ingo Molnar <mingo@xxxxxxxxxx>
Cc: Alice Ferrazzi <alicef@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>

---
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
@@ -470,6 +470,7 @@ 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:
@@ -481,6 +482,9 @@ 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;