From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752662AbeB1PBr (ORCPT ); Wed, 28 Feb 2018 10:01:47 -0500 Received: from mga12.intel.com ([192.55.52.136]:56134 "EHLO mga12.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752485AbeB1PBq (ORCPT ); Wed, 28 Feb 2018 10:01:46 -0500 X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.47,406,1515484800"; d="scan'208";a="33517419" From: "Kirill A. Shutemov" To: Ingo Molnar , x86@kernel.org, Thomas Gleixner , "H. Peter Anvin" Cc: Fengguang Wu , linux-kernel@vger.kernel.org, "Kirill A. Shutemov" Subject: [PATCH] x86/mm: Avoid paravirtualization calls in native_set_p4d() Date: Wed, 28 Feb 2018 18:00:22 +0300 Message-Id: <20180228150022.88560-1-kirill.shutemov@linux.intel.com> X-Mailer: git-send-email 2.16.1 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org p4d_val() and pgd_val() are paravirtualized and we should avoid using them in native_set_p4d(). Let's replace them with native_p4d_val() and native_pgd_val(). Signed-off-by: Kirill A. Shutemov Reported-by: Fengguang Wu Fixes: 91f606a8fa68 ("x86/mm: Replace compile-time checks for 5-level paging with runtime-time checks") --- arch/x86/include/asm/pgtable_64.h | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/arch/x86/include/asm/pgtable_64.h b/arch/x86/include/asm/pgtable_64.h index 81dda8d1d0bd..163e01a0631d 100644 --- a/arch/x86/include/asm/pgtable_64.h +++ b/arch/x86/include/asm/pgtable_64.h @@ -224,9 +224,9 @@ static inline void native_set_p4d(p4d_t *p4dp, p4d_t p4d) return; } - pgd = native_make_pgd(p4d_val(p4d)); + pgd = native_make_pgd(native_p4d_val(p4d)); pgd = pti_set_user_pgd((pgd_t *)p4dp, pgd); - *p4dp = native_make_p4d(pgd_val(pgd)); + *p4dp = native_make_p4d(native_pgd_val(pgd)); } static inline void native_p4d_clear(p4d_t *p4d) -- 2.16.1