From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S933728AbdKGMW1 (ORCPT ); Tue, 7 Nov 2017 07:22:27 -0500 Received: from terminus.zytor.com ([65.50.211.136]:48595 "EHLO terminus.zytor.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S933692AbdKGMWZ (ORCPT ); Tue, 7 Nov 2017 07:22:25 -0500 Date: Tue, 7 Nov 2017 04:18:45 -0800 From: tip-bot for Tom Lendacky Message-ID: Cc: thomas.lendacky@amd.com, tglx@linutronix.de, mingo@kernel.org, dave.hansen@intel.com, peterz@infradead.org, linux-kernel@vger.kernel.org, hpa@zytor.com, bp@alien8.de Reply-To: tglx@linutronix.de, thomas.lendacky@amd.com, bp@alien8.de, peterz@infradead.org, hpa@zytor.com, linux-kernel@vger.kernel.org, dave.hansen@intel.com, mingo@kernel.org In-Reply-To: <20171101165426.1388.24866.stgit@tlendack-t1.amdoffice.net> References: <20171101165426.1388.24866.stgit@tlendack-t1.amdoffice.net> To: linux-tip-commits@vger.kernel.org Subject: [tip:x86/urgent] x86/mm: Remove unneeded TLB flush for in-place encryption Git-Commit-ID: f1f31404c2f7fa168445d9c5ccb6a7caa53e2b78 X-Mailer: tip-git-log-daemon Robot-ID: Robot-Unsubscribe: Contact to get blacklisted from these emails MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Content-Type: text/plain; charset=UTF-8 Content-Disposition: inline Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Commit-ID: f1f31404c2f7fa168445d9c5ccb6a7caa53e2b78 Gitweb: https://git.kernel.org/tip/f1f31404c2f7fa168445d9c5ccb6a7caa53e2b78 Author: Tom Lendacky AuthorDate: Wed, 1 Nov 2017 11:54:26 -0500 Committer: Thomas Gleixner CommitDate: Tue, 7 Nov 2017 13:13:45 +0100 x86/mm: Remove unneeded TLB flush for in-place encryption A TLB flush is not required when doing in-place encryption or decryption since the area's pagetable attributes are not being altered. To avoid confusion between what the routine is doing and what is documented in the AMD APM, delete the local_flush_tlb() call. Suggested-by: Dave Hansen Signed-off-by: Tom Lendacky Signed-off-by: Thomas Gleixner Cc: Peter Zijlstra Cc: Borislav Petkov Link: https://lkml.kernel.org/r/20171101165426.1388.24866.stgit@tlendack-t1.amdoffice.net --- arch/x86/mm/mem_encrypt.c | 1 - 1 file changed, 1 deletion(-) diff --git a/arch/x86/mm/mem_encrypt.c b/arch/x86/mm/mem_encrypt.c index 16c5f37..53680a9 100644 --- a/arch/x86/mm/mem_encrypt.c +++ b/arch/x86/mm/mem_encrypt.c @@ -63,7 +63,6 @@ static void __init __sme_early_enc_dec(resource_size_t paddr, if (!sme_me_mask) return; - local_flush_tlb(); wbinvd(); /*