linux-kernel - [tip:x86/urgent] x86/umip: Print a line in the boot log that UMIP has been enabled

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Message-ID: <tip-770c77557757873808a474016a3cae4b37690cb2@git.kernel.org>
Date:   Tue, 14 Nov 2017 01:31:21 -0800
From:   tip-bot for Ricardo Neri <tipbot@...or.com>
To:     linux-tip-commits@...r.kernel.org
Cc:     tony.luck@...el.com, pbonzini@...hat.com,
        ricardo.neri-calderon@...ux.intel.com, bp@...e.de,
        linux-kernel@...r.kernel.org, hpa@...or.com, peterz@...radead.org,
        mingo@...nel.org, ravi.v.shankar@...el.com, tglx@...utronix.de,
        luto@...nel.org, torvalds@...ux-foundation.org
Subject: [tip:x86/urgent] x86/umip: Print a line in the boot log that UMIP
 has been enabled

Commit-ID:  770c77557757873808a474016a3cae4b37690cb2
Gitweb:     https://git.kernel.org/tip/770c77557757873808a474016a3cae4b37690cb2
Author:     Ricardo Neri <ricardo.neri-calderon@...ux.intel.com>
AuthorDate: Mon, 13 Nov 2017 22:29:43 -0800
Committer:  Ingo Molnar <mingo@...nel.org>
CommitDate: Tue, 14 Nov 2017 08:38:09 +0100

x86/umip: Print a line in the boot log that UMIP has been enabled

Indicate that this feature has been enabled.

Suggested-by: Ingo Molnar <mingo@...nel.org>
Signed-off-by: Ricardo Neri <ricardo.neri-calderon@...ux.intel.com>
Cc: Andy Lutomirski <luto@...nel.org>
Cc: Borislav Petkov <bp@...e.de>
Cc: Linus Torvalds <torvalds@...ux-foundation.org>
Cc: Paolo Bonzini <pbonzini@...hat.com>
Cc: Peter Zijlstra <peterz@...radead.org>
Cc: Ravi V. Shankar <ravi.v.shankar@...el.com>
Cc: Thomas Gleixner <tglx@...utronix.de>
Cc: Tony Luck <tony.luck@...el.com>
Cc: ricardo.neri@...el.com
Link: http://lkml.kernel.org/r/1510640985-18412-3-git-send-email-ricardo.neri-calderon@linux.intel.com
[ Changelog tweaks. ]
Signed-off-by: Ingo Molnar <mingo@...nel.org>
---
 arch/x86/kernel/cpu/common.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/arch/x86/kernel/cpu/common.c b/arch/x86/kernel/cpu/common.c
index 13ae9e5..fa998ca 100644
--- a/arch/x86/kernel/cpu/common.c
+++ b/arch/x86/kernel/cpu/common.c
@@ -341,6 +341,8 @@ static __always_inline void setup_umip(struct cpuinfo_x86 *c)
 
 	cr4_set_bits(X86_CR4_UMIP);
 
+	pr_info("x86/cpu: Activated the Intel User Mode Instruction Prevention (UMIP) CPU feature\n");
+
 	return;
 
 out: