From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from shelob.surriel.com (shelob.surriel.com [96.67.55.147]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 8F37A1BCA05 for ; Sun, 12 Jan 2025 15:55:11 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=96.67.55.147 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1736697313; cv=none; b=kudCSZSqXz3mJzcv1kd8ziII/PNfGpUaKdZ9LwxaIYRzQyYGEtlLdJeOipzFGlFV7hmML73//7Rdp1mdL82JQMZo+AFcPkdpU412mSgdGAq2ZO4hwDeBBnySoGWECkti/xgBgbHVV2SVaM2UCuTTF/LbbyQaC++rKtO6CiTOrbo= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1736697313; c=relaxed/simple; bh=IDiQ9mXSHtaZ8CmiZNcqjqzY0JHHB3s8lyAjx3TKrjM=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=Yq37Ud/Cqa+7hKuSn/iImfiLL/Kt+1GSWIZ51HI3g56p+Tfb3g81fx9VEHNdncUoaXPxBRDWD+ersAXqox3hgLWGlE/8YiXS0AHop4TBLTbesrE17LxB9e+aZMLPHm6pYR9K1GqlZfPdnPFbVfX3A3NXPQVISQt8/zbDahr8FvI= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=surriel.com; spf=pass smtp.mailfrom=shelob.surriel.com; arc=none smtp.client-ip=96.67.55.147 Authentication-Results: smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=surriel.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=shelob.surriel.com Received: from fangorn.home.surriel.com ([10.0.13.7]) by shelob.surriel.com with esmtpsa (TLS1.2) tls TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 (Exim 4.97.1) (envelope-from ) id 1tX0Ii-0000000010W-3An5; Sun, 12 Jan 2025 10:54:56 -0500 From: Rik van Riel To: x86@kernel.org Cc: linux-kernel@vger.kernel.org, bp@alien8.de, peterz@infradead.org, dave.hansen@linux.intel.com, zhengqi.arch@bytedance.com, nadav.amit@gmail.com, thomas.lendacky@amd.com, kernel-team@meta.com, linux-mm@kvack.org, akpm@linux-foundation.org, jannh@google.com, Rik van Riel Subject: [PATCH v4 07/12] x86/tlb: use INVLPGB in flush_tlb_all Date: Sun, 12 Jan 2025 10:53:51 -0500 Message-ID: <20250112155453.1104139-8-riel@surriel.com> X-Mailer: git-send-email 2.47.1 In-Reply-To: <20250112155453.1104139-1-riel@surriel.com> References: <20250112155453.1104139-1-riel@surriel.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Sender: riel@surriel.com The flush_tlb_all() function is not used a whole lot, but we might as well use broadcast TLB flushing there, too. Signed-off-by: Rik van Riel --- arch/x86/mm/tlb.c | 14 ++++++++++++++ 1 file changed, 14 insertions(+) diff --git a/arch/x86/mm/tlb.c b/arch/x86/mm/tlb.c index 45c7b84f6f80..56634c735351 100644 --- a/arch/x86/mm/tlb.c +++ b/arch/x86/mm/tlb.c @@ -1065,6 +1065,18 @@ void flush_tlb_mm_range(struct mm_struct *mm, unsigned long start, } +static bool broadcast_flush_tlb_all(void) { + if (!IS_ENABLED(CONFIG_X86_BROADCAST_TLB_FLUSH)) + return false; + + if (!cpu_feature_enabled(X86_FEATURE_INVLPGB)) + return false; + + guard(preempt)(); + invlpgb_flush_all(); + return true; +} + static void do_flush_tlb_all(void *info) { count_vm_tlb_event(NR_TLB_REMOTE_FLUSH_RECEIVED); @@ -1073,6 +1085,8 @@ static void do_flush_tlb_all(void *info) void flush_tlb_all(void) { + if (broadcast_flush_tlb_all()) + return; count_vm_tlb_event(NR_TLB_REMOTE_FLUSH); on_each_cpu(do_flush_tlb_all, NULL, 1); } -- 2.47.1