From patchwork Tue Mar 11 17:05:09 2025 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Nam Cao X-Patchwork-Id: 14012385 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 4DC7EC28B2F for ; Tue, 11 Mar 2025 17:09:00 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:References:In-Reply-To: Message-Id:Date:Subject:Cc:To:From:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=wtQ8ELcm50qcAPgQVfiVu6nwHWmGRlnoMPxvWZt4vqU=; b=cONKGW5bU77LGF EUJjvJcy/GcJooAbJt0e80LuTriaUGhQ1BjZRnJF5VDFIMVdLv8h7NzeQBk4lOEuvB9F3NKTKJYa9 Ucp+Fp1Jl7tSG7dR65G7DUqgcsyUUrZcgElJlhQXv+K8oo1rmufS9mxMcxbMVDu41TeNvBd5dKHWY WAFnTFb3NNuL22X59D+vIIBEQ4gHJ9AV/JrueOCieTCGPEPHhVQGSGpwzQGp9SCskjxKyGFj28/QV Z2Y9NReo896FsvV8BAi9Kjp9w8WIXR0VaQ0pe5KjwGGg4TL+4pit3feZaErQpo4M5QHDbVpBZz8Wu MLBa8FklFto7czO5a6Ww==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.98 #2 (Red Hat Linux)) id 1ts366-00000006PSf-30yh; Tue, 11 Mar 2025 17:08:54 +0000 Received: from galois.linutronix.de ([193.142.43.55]) by bombadil.infradead.org with esmtps (Exim 4.98 #2 (Red Hat Linux)) id 1ts32p-00000006OUO-0Axs for linux-riscv@lists.infradead.org; Tue, 11 Mar 2025 17:05:32 +0000 From: Nam Cao DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linutronix.de; s=2020; t=1741712729; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=eXShVdGyHkymBrWxSB5AB2Yn4Vhhr4p3inDGKP7lxQo=; b=ucOxcmo7pEPwLOMGH7ybPgvjYUP/Y4xGR5SiB3jj/JBwJNlD+UccQbnovZXYlhW817Myit 2jU86mFch5dc5nautbPZJCwOqTTBgJtWnLGGLxjSRsV89yFJf65ZQ6qXmy6bCJLBxYpuVE KxATNAu2yKbBq/xeFBi3pdyqQSC5//+xj/2ryCEOpiCdPQAng10Bwb+rbk/2Ixy8os90PP 1rPe2Q6I67Nv7ljX6Sf0bmq4WBqgMfHv0JYjB1pcoDHnBslVQhn99hSkh/VgSUamd8oMpi u3z/j44cXQjeeTN6nlXf2BH2LfLke52vGCRSjWj/AZjNoquXDE3aW6Ns5owV0Q== DKIM-Signature: v=1; a=ed25519-sha256; c=relaxed/relaxed; d=linutronix.de; s=2020e; t=1741712729; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=eXShVdGyHkymBrWxSB5AB2Yn4Vhhr4p3inDGKP7lxQo=; b=R5Bt5FmJjoZpm+N1aXSQOGGFhU1AyycnUhZhcJsDD75Hk7fUKjaNBCBSe1aYf6P0hE2/N3 gkwbrceCot64dkCw== To: Steven Rostedt , Gabriele Monaco , john.ogness@linutronix.de, linux-trace-kernel@vger.kernel.org, linux-kernel@vger.kernel.org Cc: Nam Cao , Paul Walmsley , Palmer Dabbelt , Albert Ou , Alexandre Ghiti , linux-riscv@lists.infradead.org Subject: [PATCH 08/10] riscv: mm: Add page fault trace points Date: Tue, 11 Mar 2025 18:05:09 +0100 Message-Id: <672e2bed604c307c807f546627ba5a9454ef10eb.1741708239.git.namcao@linutronix.de> In-Reply-To: References: MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20250311_100531_221942_5D174663 X-CRM114-Status: UNSURE ( 7.19 ) X-CRM114-Notice: Please train this message. X-BeenThere: linux-riscv@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-riscv" Errors-To: linux-riscv-bounces+linux-riscv=archiver.kernel.org@lists.infradead.org Add page fault trace points, which are useful to implement RV monitor that watches page faults. Signed-off-by: Nam Cao --- Cc: Paul Walmsley Cc: Palmer Dabbelt Cc: Albert Ou Cc: Alexandre Ghiti Cc: linux-riscv@lists.infradead.org --- arch/riscv/mm/fault.c | 8 ++++++++ 1 file changed, 8 insertions(+) diff --git a/arch/riscv/mm/fault.c b/arch/riscv/mm/fault.c index 0194324a0c50..04ed6f8acae4 100644 --- a/arch/riscv/mm/fault.c +++ b/arch/riscv/mm/fault.c @@ -20,6 +20,9 @@ #include #include +#define CREATE_TRACE_POINTS +#include + #include "../kernel/head.h" static void show_pte(unsigned long addr) @@ -291,6 +294,11 @@ void handle_page_fault(struct pt_regs *regs) if (kprobe_page_fault(regs, cause)) return; + if (user_mode(regs)) + trace_page_fault_user(addr, regs, cause); + else + trace_page_fault_kernel(addr, regs, cause); + /* * Fault-in kernel-space virtual memory on-demand. * The 'reference' page table is init_mm.pgd.