From nobody Thu Dec 18 20:34:27 2025 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 188122641E8 for ; Tue, 11 Feb 2025 21:08:32 +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=1739308114; cv=none; b=kY3/KhNH63C0wrp71X7w+qM3Li3ZfVFCy2dJmVG4PIJ05I8mVjPLnvne8ia/TqcZzDgmTwFzEOOtK4r6VVhPRyXoU5CbsSXBReenYYzEOvvCWOlDXITu+a53Em9m5LjfjfZr6VJczMC7bVskTZhUFiykxAaxxHenjJUl6riuyM8= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1739308114; c=relaxed/simple; bh=Vwmve58dF7GFpv3pyTR6PvKjLpFmn5NnPVLBU+kAhx4=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=uRO1q+9nJaAre07RNDW6LPVbVL6G94JVxXmopjEZG3sotriS/8eDo4oY5L1yOIxcxl9sF+LXRJY11px99Plpx6c/SpAku/aAE1gcPBJo3jskBpAVTjGJ2hOMcBQgU9/6AdVZasY6L5bMimjhsjjdwH+sZDMwOcpsnioC1/vGLKE= 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 1thxUX-000000008HU-36py; Tue, 11 Feb 2025 16:08:25 -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, jackmanb@google.com, jannh@google.com, mhklinux@outlook.com, andrew.cooper3@citrix.com, Rik van Riel , Manali Shukla Subject: [PATCH v10 07/12] x86/mm: use INVLPGB in flush_tlb_all Date: Tue, 11 Feb 2025 16:08:02 -0500 Message-ID: <20250211210823.242681-8-riel@surriel.com> X-Mailer: git-send-email 2.47.1 In-Reply-To: <20250211210823.242681-1-riel@surriel.com> References: <20250211210823.242681-1-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 Tested-by: Manali Shukla Tested-by: Brendan Jackman --- arch/x86/mm/tlb.c | 12 ++++++++++++ 1 file changed, 12 insertions(+) diff --git a/arch/x86/mm/tlb.c b/arch/x86/mm/tlb.c index 54a118b22e59..62b4eaf4e851 100644 --- a/arch/x86/mm/tlb.c +++ b/arch/x86/mm/tlb.c @@ -1065,6 +1065,16 @@ void flush_tlb_mm_range(struct mm_struct *mm, unsign= ed long start, } =20 =20 +static bool broadcast_flush_tlb_all(void) +{ + 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 +1083,8 @@ 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