From nobody Sun Feb 8 20:36:48 2026 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 405B218C31 for ; Mon, 20 Jan 2025 02:41:33 +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=1737340894; cv=none; b=uYq4Yh9KnwhRJJ9iuLGpUXO4jdno0/rsPX67Lmy7aTrIOe+iSRV02nW0rQfMC2jkYDcNP5XtNVbndI8LAnX2ZUgm0hrR5GD3zg5LSlNrlCUZtnRyZdO0iyjhfn6b1RIwByc0awa94UYUlx22ZeCAcqHooxQ8t+L+LEc72wL03sw= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1737340894; c=relaxed/simple; bh=VJPS002xdvadLwLBRGebSLeOCS4qEZ8vpC1XZTR7mIE=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=XgM3yPfUgsKtNwDODWd6NQZ5L/VAAaGSyoz3opQvbKJfuH6pOANJFTbDXR0QIAlQi0WnlgZLmbh8ejzMu5vz0OUFcmIjPNogRuzM2Vsk70xUV8SvGdQU1Q3S7SfncZwW9rwVFe7Vd4eZROWSX7hBDF2s4vVNOoiVxNCN5GyMI2s= 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 1tZhis-000000002w5-1D2R; Sun, 19 Jan 2025 21:41:06 -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, mhklinux@outlook.com, andrew.cooper3@citrix.com, Rik van Riel Subject: [PATCH v6 07/12] x86/tlb: use INVLPGB in flush_tlb_all Date: Sun, 19 Jan 2025 21:40:15 -0500 Message-ID: <20250120024104.1924753-8-riel@surriel.com> X-Mailer: git-send-email 2.47.1 In-Reply-To: <20250120024104.1924753-1-riel@surriel.com> References: <20250120024104.1924753-1-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: quoted-printable Sender: riel@surriel.com Content-Type: text/plain; charset="utf-8" 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 | 15 +++++++++++++++ 1 file changed, 15 insertions(+) diff --git a/arch/x86/mm/tlb.c b/arch/x86/mm/tlb.c index 2c9e9b7482dd..e2a0b7fc5fed 100644 --- a/arch/x86/mm/tlb.c +++ b/arch/x86/mm/tlb.c @@ -1065,6 +1065,19 @@ void flush_tlb_mm_range(struct mm_struct *mm, unsign= ed long start, } =20 =20 +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 +1086,8 @@ static void do_flush_tlb_all(void *info) =20 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); } --=20 2.47.1