From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-14.8 required=3.0 tests=BAYES_00,DKIM_INVALID, DKIM_SIGNED,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI, MENTIONS_GIT_HOSTING,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 112F9C433E3 for ; Sat, 15 Aug 2020 21:52:05 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id DFFED2053B for ; Sat, 15 Aug 2020 21:52:04 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (2048-bit key) header.d=linutronix.de header.i=@linutronix.de header.b="E9kn2F4k"; dkim=permerror (0-bit key) header.d=linutronix.de header.i=@linutronix.de header.b="e9IIohao" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728975AbgHOVwC (ORCPT ); Sat, 15 Aug 2020 17:52:02 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:45636 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728111AbgHOVvx (ORCPT ); Sat, 15 Aug 2020 17:51:53 -0400 Received: from galois.linutronix.de (Galois.linutronix.de [IPv6:2a0a:51c0:0:12e:550::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 45092C09B04F; Sat, 15 Aug 2020 08:47:01 -0700 (PDT) Date: Sat, 15 Aug 2020 15:46:49 -0000 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linutronix.de; s=2020; t=1597506410; h=from:from:sender:sender:reply-to:reply-to:subject:subject:date:date: message-id:message-id:to:to:cc:cc:mime-version:mime-version: content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=hJiOU8mAJuAeFjX4cBj1OC2CmBz/7FhgRkAnQxo82Hk=; b=E9kn2F4kyUoVWmQbz6l28Fm1ZIMo4c2kzD+OtlDQBq30xN6MpR98cEEa5S+0ixdZCh/f6V lOBwDbTusoU9hMxiQc3yYOCNCBa8YUvDD/+fPDTYn07ALmfNPlqEtL2TDsDo+aysCdnH00 rAXTSNdwMoJK5EnzVp5rkSje3RIdS7q3VxKxaFC0mJsLsn32uVvmZYwkxY4sib4pzpxUsU ABElAh9JG8pNO7hGa3mpmHRlgRjiFhVP6uXTMbFoefiwtlWEFTAnnZhtUemY1/sbr8VZQu k91TrHspeXMM3vLmQVxPDHbh6YPv81kahBgEgMRrJM0LH0OWDsI1u7M1HIebSQ== DKIM-Signature: v=1; a=ed25519-sha256; c=relaxed/relaxed; d=linutronix.de; s=2020e; t=1597506410; h=from:from:sender:sender:reply-to:reply-to:subject:subject:date:date: message-id:message-id:to:to:cc:cc:mime-version:mime-version: content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=hJiOU8mAJuAeFjX4cBj1OC2CmBz/7FhgRkAnQxo82Hk=; b=e9IIohao6B9Rf9caOvcab9Awg1OvRNLKPfwj54plIq4/Moo5hej7VwlTKLfKTfG6x3JKae Wvv+HHwUwaNl9nAQ== From: "tip-bot2 for Juergen Gross" Reply-to: linux-kernel@vger.kernel.org To: linux-tip-commits@vger.kernel.org Subject: [tip: x86/paravirt] x86/paravirt: Avoid needless paravirt step clearing page table entries Cc: Juergen Gross , Ingo Molnar , x86 , LKML In-Reply-To: <20200815100641.26362-7-jgross@suse.com> References: <20200815100641.26362-7-jgross@suse.com> MIME-Version: 1.0 Message-ID: <159750640968.3192.2279401610614202728.tip-bot2@tip-bot2> Robot-ID: Robot-Unsubscribe: Contact to get blacklisted from these emails Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org The following commit has been merged into the x86/paravirt branch of tip: Commit-ID: 7c9f80cb76ec9f14c3b25509168b1a2f7942e418 Gitweb: https://git.kernel.org/tip/7c9f80cb76ec9f14c3b25509168b1a2f7942e418 Author: Juergen Gross AuthorDate: Sat, 15 Aug 2020 12:06:41 +02:00 Committer: Ingo Molnar CommitterDate: Sat, 15 Aug 2020 13:52:12 +02:00 x86/paravirt: Avoid needless paravirt step clearing page table entries pte_clear() et al are based on two paravirt steps today: one step to create a page table entry with all zeroes, and one step to write this entry value. Drop the first step as it is completely useless. Signed-off-by: Juergen Gross Signed-off-by: Ingo Molnar Link: https://lore.kernel.org/r/20200815100641.26362-7-jgross@suse.com --- arch/x86/include/asm/paravirt.h | 12 ++++++------ 1 file changed, 6 insertions(+), 6 deletions(-) diff --git a/arch/x86/include/asm/paravirt.h b/arch/x86/include/asm/paravirt.h index f0464b8..d25cc68 100644 --- a/arch/x86/include/asm/paravirt.h +++ b/arch/x86/include/asm/paravirt.h @@ -448,7 +448,7 @@ static inline pudval_t pud_val(pud_t pud) static inline void pud_clear(pud_t *pudp) { - set_pud(pudp, __pud(0)); + set_pud(pudp, native_make_pud(0)); } static inline void set_p4d(p4d_t *p4dp, p4d_t p4d) @@ -485,15 +485,15 @@ static inline void __set_pgd(pgd_t *pgdp, pgd_t pgd) } while (0) #define pgd_clear(pgdp) do { \ - if (pgtable_l5_enabled()) \ - set_pgd(pgdp, __pgd(0)); \ + if (pgtable_l5_enabled()) \ + set_pgd(pgdp, native_make_pgd(0)); \ } while (0) #endif /* CONFIG_PGTABLE_LEVELS == 5 */ static inline void p4d_clear(p4d_t *p4dp) { - set_p4d(p4dp, __p4d(0)); + set_p4d(p4dp, native_make_p4d(0)); } static inline void set_pte_atomic(pte_t *ptep, pte_t pte) @@ -504,12 +504,12 @@ static inline void set_pte_atomic(pte_t *ptep, pte_t pte) static inline void pte_clear(struct mm_struct *mm, unsigned long addr, pte_t *ptep) { - set_pte(ptep, __pte(0)); + set_pte(ptep, native_make_pte(0)); } static inline void pmd_clear(pmd_t *pmdp) { - set_pmd(pmdp, __pmd(0)); + set_pmd(pmdp, native_make_pmd(0)); } #define __HAVE_ARCH_START_CONTEXT_SWITCH