From patchwork Sun Jul 21 21:40:28 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Helge Deller X-Patchwork-Id: 13738100 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (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 C00E48F5B for ; Sun, 21 Jul 2024 21:40:40 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1721598040; cv=none; b=G35qu7Ykt9RYRfxjX48/2S5QR/pMmlefK2BL6JTbAptD6lBLf9Z1+N14TSVER08qUFfMuqzWcx0rwLNbH17vHULynIHBKiIEdJgsHlVFkhjKoz+mljsrkazXFh6Q11Hn+i2dlfn8g4dhpmIdnwhmhPQtHqzbZPWO7N3jzzR1oXA= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1721598040; c=relaxed/simple; bh=+WvKUXTHzHRpIIK04rDPTtGFsCz+fpdIaij6HP/9x6s=; h=From:To:Cc:Subject:Date:Message-ID:MIME-Version; b=Wootqcnf/xrOMICnD+9GDhTAqALPQ3U4uMF2EvSBEhojDAE0k6md/x8Gq/tf2dHPtoo4gCFHEjzDqiVnoFmlZgYrkymqgeROuYlDbjG5koran0bmzOgEhZrgV91U02M/W2j8rLLDGnAPdp9IPgXBI2Z8jZcynvApICiQzO8W/Rg= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=KyacpAI1; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="KyacpAI1" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 7231AC116B1; Sun, 21 Jul 2024 21:40:39 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1721598040; bh=+WvKUXTHzHRpIIK04rDPTtGFsCz+fpdIaij6HP/9x6s=; h=From:To:Cc:Subject:Date:From; b=KyacpAI1na5axdU4vEi5iYhXuykqyjkjXbzTTfabkfkL5IEw0wONR/x+7g7IgGUk/ tSVuRuYiiZxHkhYbPudk93ghB8iWGgfyVCkaX6xWRPHmdIewIVAgDm9UJh8AZlDdkc C3clZx4YmQDp5ucVYoA5fT+skKQYDTe5b89+0sCncfrccY4NkzZ31Fs3t0X5eulsMI CsDobQdg4cHtlm3AKGW7qzcf5+Yyx7VH7CGAByMZ4svBC1a3VJqIynhUgHnWBbQnas cnBeELy2qRaF/nXmv3R7spH+bMEa+T3BhdWCgrQt/UOzEho/RgreuqV+hMlRCPigKn yy/iTWMunpBKw== From: deller@kernel.org To: linux-parisc@vger.kernel.org Cc: Helge Deller Subject: [PATCH] parisc: Add support for CONFIG_SYSCTL_ARCH_UNALIGN_NO_WARN Date: Sun, 21 Jul 2024 23:40:28 +0200 Message-ID: <20240721214028.22180-1-deller@kernel.org> X-Mailer: git-send-email 2.45.2 Precedence: bulk X-Mailing-List: linux-parisc@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 From: Helge Deller Allow users to disable kernel warnings for unaligned memory accesses from kernel via the /proc/sys/kernel/ignore-unaligned-usertrap procfs entry. That way users can disable those warnings in case they happen too often. Signed-off-by: Helge Deller --- Documentation/admin-guide/sysctl/kernel.rst | 2 +- arch/parisc/Kconfig | 1 + arch/parisc/kernel/unaligned.c | 2 ++ 3 files changed, 4 insertions(+), 1 deletion(-) diff --git a/Documentation/admin-guide/sysctl/kernel.rst b/Documentation/admin-guide/sysctl/kernel.rst index 7fd43947832f..f8bc1630eba0 100644 --- a/Documentation/admin-guide/sysctl/kernel.rst +++ b/Documentation/admin-guide/sysctl/kernel.rst @@ -454,7 +454,7 @@ ignore-unaligned-usertrap On architectures where unaligned accesses cause traps, and where this feature is supported (``CONFIG_SYSCTL_ARCH_UNALIGN_NO_WARN``; -currently, ``arc`` and ``loongarch``), controls whether all +currently, ``arc``, ``parisc`` and ``loongarch``), controls whether all unaligned traps are logged. = ============================================================= diff --git a/arch/parisc/Kconfig b/arch/parisc/Kconfig index 50735f3a772c..d815af5f1aeb 100644 --- a/arch/parisc/Kconfig +++ b/arch/parisc/Kconfig @@ -45,6 +45,7 @@ config PARISC select GENERIC_CPU_DEVICES if !SMP select GENERIC_LIB_DEVMEM_IS_ALLOWED select SYSCTL_ARCH_UNALIGN_ALLOW + select SYSCTL_ARCH_UNALIGN_NO_WARN select SYSCTL_EXCEPTION_TRACE select HAVE_MOD_ARCH_SPECIFIC select MODULES_USE_ELF_RELA diff --git a/arch/parisc/kernel/unaligned.c b/arch/parisc/kernel/unaligned.c index 71e596ca5a86..3e79e40e361d 100644 --- a/arch/parisc/kernel/unaligned.c +++ b/arch/parisc/kernel/unaligned.c @@ -104,6 +104,7 @@ #define ERR_NOTHANDLED -1 int unaligned_enabled __read_mostly = 1; +int no_unaligned_warning __read_mostly; static int emulate_ldh(struct pt_regs *regs, int toreg) { @@ -399,6 +400,7 @@ void handle_unaligned(struct pt_regs *regs) } else { static DEFINE_RATELIMIT_STATE(kernel_ratelimit, 5 * HZ, 5); if (!(current->thread.flags & PARISC_UAC_NOPRINT) && + !no_unaligned_warning && __ratelimit(&kernel_ratelimit)) pr_warn("Kernel: unaligned access to " RFMT " in %pS " "(iir " RFMT ")\n",