x86/microcode/AMD: Increase microcode PATCH_MAX_SIZE
authorJohn Allen <john.allen@amd.com>
Thu, 9 Apr 2020 15:34:29 +0000 (10:34 -0500)
committerBorislav Petkov <bp@suse.de>
Tue, 14 Apr 2020 15:34:46 +0000 (17:34 +0200)
Future AMD CPUs will have microcode patches that exceed the default 4K
patch size. Raise our limit.

Signed-off-by: John Allen <john.allen@amd.com>
Signed-off-by: Borislav Petkov <bp@suse.de>
Cc: stable@vger.kernel.org # v4.14..
Link: https://lkml.kernel.org/r/20200409152931.GA685273@mojo.amd.com
arch/x86/include/asm/microcode_amd.h

index 6685e1218959d21b2c93ceb56992ef291e427ac0..7063b5a43220a96a363f97e3567fabd0fbc8be70 100644 (file)
@@ -41,7 +41,7 @@ struct microcode_amd {
        unsigned int                    mpb[0];
 };
 
-#define PATCH_MAX_SIZE PAGE_SIZE
+#define PATCH_MAX_SIZE (3 * PAGE_SIZE)
 
 #ifdef CONFIG_MICROCODE_AMD
 extern void __init load_ucode_amd_bsp(unsigned int family);