blob: 8d32a6145b3ab36b97842aeb8468be485da37741 [file] [log] [blame]
From f9cbcdf7ae0f9ecba3b9ca7626a152cac4d5fc44 Mon Sep 17 00:00:00 2001
From: John Allen <john.allen@amd.com>
Date: Thu, 9 Apr 2020 10:34:29 -0500
Subject: [PATCH] x86/microcode/AMD: Increase microcode PATCH_MAX_SIZE
commit bdf89df3c54518eed879d8fac7577fcfb220c67e upstream.
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
Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
diff --git a/arch/x86/include/asm/microcode_amd.h b/arch/x86/include/asm/microcode_amd.h
index 209492849566..5c524d4f71cd 100644
--- a/arch/x86/include/asm/microcode_amd.h
+++ b/arch/x86/include/asm/microcode_amd.h
@@ -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);
--
2.7.4