From nobody Sun Feb 8 22:08:30 2026 Received: from galois.linutronix.de (Galois.linutronix.de [193.142.43.55]) (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 F2F3D2D193B; Tue, 29 Apr 2025 12:01:39 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=193.142.43.55 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1745928102; cv=none; b=WfvM7IjVFwDRgbgM54c80FS1HYUMCNbjw/vcq9TfBh8t/EBlcTaTue4BI/z7AE3z/Nc1aW97ZrF79lyuljuk47Ufb7CNNYpYMZ+Nw+fKSUXD5SM2qGCGiPWJJNgYPwpS4LWNJXIlfARyeovAIzAFt0YRbZXpZfbH0JNEDHLMLn8= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1745928102; c=relaxed/simple; bh=eX5oXC+HBcw1mu0TCAHq5i0a+I/QmsXUI8/vYm8odp4=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version; b=kypJOYfUPQ3rAjVSxJtzzHy4cT7FMzDkRj2CH7meoGG6y2mXL+KdDKHxGYpgk8uF9wntxXkeEpw3b5zu8iB1RIfWidiIS6idt4JipMewuoxkL3wZyJfm/gnVcL83Hof8X0IKo1IBUQfSXwfHLFYkOxMn9ZYUgDQXSHxJEKS8gCg= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linutronix.de; spf=pass smtp.mailfrom=linutronix.de; dkim=pass (2048-bit key) header.d=linutronix.de header.i=@linutronix.de header.b=zs50VbMd; dkim=permerror (0-bit key) header.d=linutronix.de header.i=@linutronix.de header.b=kUuJdrB1; arc=none smtp.client-ip=193.142.43.55 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linutronix.de Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=linutronix.de Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=linutronix.de header.i=@linutronix.de header.b="zs50VbMd"; dkim=permerror (0-bit key) header.d=linutronix.de header.i=@linutronix.de header.b="kUuJdrB1" From: Nam Cao DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linutronix.de; s=2020; t=1745928092; 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=GRN84yAGCbJ9jXd7YMFr0fN4dU5tvyZpKeky5D5bT9k=; b=zs50VbMd5RPwPLLoES8n9vP5JDBeTma5SNNlVGcRoV8H+HTZB9R7c3aP96Cx9Mdk16UBvw RNBgsv4/UFu6erZ5g3/N5FznYjJ+j9VDtBaL/2Xp3d4bHLZxM4p5RPk1QBLHFQRNAUPded ZAvHlTtx0pMZtriVVtm/hXnjV/XbgvGa/dwybOQ9sxFsuIWG5Mkute9JbKpeXdOWtq1bEz xIowuDFUr1928UvbunJnQ7VloI3F2d413tNzi2CVfU47z/FICZOHp0BMSN5ut9KsCz1lRY JgFrPAIRedLPGsyCQwVlTHg4L6cfFlfj6ENHb+ybgKbD/F9vdItQo1jkpIVMLg== DKIM-Signature: v=1; a=ed25519-sha256; c=relaxed/relaxed; d=linutronix.de; s=2020e; t=1745928092; 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=GRN84yAGCbJ9jXd7YMFr0fN4dU5tvyZpKeky5D5bT9k=; b=kUuJdrB1DQ5Z21gxVBukh/xivxxLllH4B3gcRA6T9DaPj9+cx0CMQe51sKURkyfvet4IL7 IsRe9NUtI2CELhCA== To: Steven Rostedt , Gabriele Monaco , linux-trace-kernel@vger.kernel.org, linux-kernel@vger.kernel.org Cc: john.ogness@linutronix.de, Nam Cao , Alexandre Ghiti , Paul Walmsley , Palmer Dabbelt , Albert Ou , linux-riscv@lists.infradead.org Subject: [PATCH v5 18/23] riscv: mm: Add page fault trace points Date: Tue, 29 Apr 2025 14:01:03 +0200 Message-Id: In-Reply-To: References: 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 Content-Type: text/plain; charset="utf-8" Add page fault trace points, which are useful to implement RV monitor that watches page faults. Signed-off-by: Nam Cao Acked-by: Alexandre Ghiti --- Cc: Paul Walmsley Cc: Palmer Dabbelt Cc: Albert Ou 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 =20 +#define CREATE_TRACE_POINTS +#include + #include "../kernel/head.h" =20 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; =20 + 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. --=20 2.39.5