From nobody Wed Feb 5 18:02:29 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 0397425A63B for ; Wed, 5 Feb 2025 01:40:58 +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=1738719660; cv=none; b=dHTitQzzT6Jbs8G4yPUf2zMbNCMQJqDSEsIsFpSVpiGfsz+Q2g45xtbKGlXmvV/9kY4nWqIhbOGvVexVhYKyEf02f/EB4heeH0HHiZa4y3hY8RdyfSm3YGfL5eXK2X6Ldu38+LpaPSRgDasyIq8Z/vmH9BHRtdQyE9JXO7/H5T0= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1738719660; c=relaxed/simple; bh=3SFxMz0K0PqIXMlsTApWhf8YE9GEYsdOvjVuc9EJzl4=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=mAYkLKq6vk28+xYllaz1dL65du7hLIs9oBDGuD68SlDPi9Q+VdFJ53jzx+OaGRo5qdMkuiAahiyNFGDnT5/fLcWL39uRSFSGQkr43rbEY+vrLzQfVDxBan4lIloVVY2CggUpbRYxpvyvA9HbOfQcx+6W+SLBEUxk5QQaLtb5jYQ= 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 1tfUP4-000000004Cs-2zwB; Tue, 04 Feb 2025 20:40:34 -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 , Manali Shukla Subject: [PATCH v8 07/12] x86/mm: use INVLPGB in flush_tlb_all Date: Tue, 4 Feb 2025 20:39:56 -0500 Message-ID: <20250205014033.3626204-8-riel@surriel.com> X-Mailer: git-send-email 2.47.1 In-Reply-To: <20250205014033.3626204-1-riel@surriel.com> References: <20250205014033.3626204-1-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 --- 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 7945624afc98..43e1abd4bcb0 100644 --- a/arch/x86/mm/tlb.c +++ b/arch/x86/mm/tlb.c @@ -1070,6 +1070,19 @@ 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); @@ -1078,6 +1091,8 @@ 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