From: Chuck Anderson <chuck.anderson@oracle.com>
Date: Sat, 18 Feb 2017 06:15:35 +0000 (-0800)
Subject: sparc64: add mcd_on_by_default
X-Git-Tag: v4.1.12-92~1^2~4
X-Git-Url: https://www.infradead.org/git/?a=commitdiff_plain;h=5ab7ad35eaac0aac0456fd3b95e117380f02cf79;p=users%2Fjedix%2Flinux-maple.git

sparc64: add mcd_on_by_default

Add the global variable mcd_on_by_default and support for the kernel boot arg
"mcd_on_by_default" which causes mcd_on_by_default = 1 if the kernel is
adi_capable().

Based on the code in commit:
    sparc64: Enable Application Data Integrity for m7 and newer processors
Required by commit:
    sparc64: Add proc files specific to ADI

Orabug: 22713162
Signed-off-by: Chuck Anderson <chuck.anderson@oracle.com>
---

diff --git a/arch/sparc/kernel/process_64.c b/arch/sparc/kernel/process_64.c
index 87a27fd5aa003..6ea1a3ebe9c8a 100644
--- a/arch/sparc/kernel/process_64.c
+++ b/arch/sparc/kernel/process_64.c
@@ -803,6 +803,16 @@ out:
 	return ret;
 }
 
+int mcd_on_by_default;
+
+static int __init setup_mcd_default(char *str)
+{
+	if (adi_capable())
+		mcd_on_by_default = 1;
+	return 1;
+}
+__setup("mcd_on_by_default", setup_mcd_default);
+
 void sparc64_elf_core_copy_regs(elf_gregset_t dst, struct pt_regs *regs)
 {
 	memcpy(&dst[0], regs->u_regs, 8 * sizeof(unsigned long));