linux-kernel - [tip:x86/asm] x86/mm: Include SEV for encryption memory attribute changes

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Date:   Tue, 7 Nov 2017 06:44:53 -0800
From:   tip-bot for Tom Lendacky <tipbot@...or.com>
To:     linux-tip-commits@...r.kernel.org
Cc:     brijesh.singh@....com, kirill.shutemov@...ux.intel.com,
        mingo@...nel.org, thomas.lendacky@....com, tglx@...utronix.de,
        matt@...eblueprint.co.uk, john.ogness@...utronix.de,
        dan.j.williams@...el.com, labbott@...hat.com, luto@...nel.org,
        bp@...e.de, bp@...en8.de, linux-kernel@...r.kernel.org,
        hpa@...or.com
Subject: [tip:x86/asm] x86/mm: Include SEV for encryption memory attribute
 changes

Commit-ID:  a72ec5a34dca3b635eb2de3b485d0a1b2e591a5c
Gitweb:     https://git.kernel.org/tip/a72ec5a34dca3b635eb2de3b485d0a1b2e591a5c
Author:     Tom Lendacky <thomas.lendacky@....com>
AuthorDate: Fri, 20 Oct 2017 09:30:48 -0500
Committer:  Thomas Gleixner <tglx@...utronix.de>
CommitDate: Tue, 7 Nov 2017 15:35:56 +0100

x86/mm: Include SEV for encryption memory attribute changes

The current code checks only for sme_active() when determining whether
to perform the encryption attribute change.  Include sev_active() in this
check so that memory attribute changes can occur under SME and SEV.

Signed-off-by: Tom Lendacky <thomas.lendacky@....com>
Signed-off-by: Brijesh Singh <brijesh.singh@....com>
Signed-off-by: Thomas Gleixner <tglx@...utronix.de>
Reviewed-by: Borislav Petkov <bp@...e.de>
Tested-by: Borislav Petkov <bp@...e.de>
Cc: Laura Abbott <labbott@...hat.com>
Cc: John Ogness <john.ogness@...utronix.de>
Cc: kvm@...r.kernel.org
Cc: Matt Fleming <matt@...eblueprint.co.uk>
Cc: Borislav Petkov <bp@...en8.de>
Cc: Andy Lutomirski <luto@...nel.org>
Cc: Dan Williams <dan.j.williams@...el.com>
Cc: "Kirill A. Shutemov" <kirill.shutemov@...ux.intel.com>
Link: https://lkml.kernel.org/r/20171020143059.3291-7-brijesh.singh@amd.com

---
 arch/x86/mm/pageattr.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/arch/x86/mm/pageattr.c b/arch/x86/mm/pageattr.c
index dfb7d65..3fe6848 100644
--- a/arch/x86/mm/pageattr.c
+++ b/arch/x86/mm/pageattr.c
@@ -1781,8 +1781,8 @@ static int __set_memory_enc_dec(unsigned long addr, int numpages, bool enc)
 	unsigned long start;
 	int ret;

-	/* Nothing to do if the SME is not active */
-	if (!sme_active())
+	/* Nothing to do if memory encryption is not active */
+	if (!mem_encrypt_active())
 		return 0;

 	/* Should not be working on unaligned addresses */