From nobody Mon Feb 9 01:11:38 2026 Received: from mgamail.intel.com (mgamail.intel.com [192.198.163.10]) (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 658B4233721; Sun, 25 Jan 2026 03:36:11 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=192.198.163.10 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1769312174; cv=none; b=H3EYxxN3b/7OEOxN623AW7XX1YaDbEjv7NfOPNkmzOL9fDqj8ZYukTOvCLMCqY17gkybdDewnBAs56YDbW0CN72eYLvsOQQUWCjB4kjt0YCLsTwVLfhV0KeTHJa2mMdrxORdJQiV953+qd5Dj9k31JAe3zedRHEZeM/gpTdx+CI= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1769312174; c=relaxed/simple; bh=q1mVf0QKYvPJ+4NSUc+0SqCKPiVImrf5Dhf0M/kxVrY=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version; b=A1F61mgKAiLuA5aHOXv7yrujn1KtVQp5++l5puW/28ezXnuWwgPWw9OHUfUnjL5OlsLpSwFoa5GWPQobJR7O5YCTaOD+6ZvqW4bpPQiv3U/UBO0qltZ8OryixprIjmQUUSlXPYFx+7tLz+O88BVGn273gwHyS0k1H1Ge+ZDucow= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=intel.com; spf=pass smtp.mailfrom=intel.com; dkim=pass (2048-bit key) header.d=intel.com header.i=@intel.com header.b=OF9tUF/f; arc=none smtp.client-ip=192.198.163.10 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=intel.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=intel.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=intel.com header.i=@intel.com header.b="OF9tUF/f" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1769312171; x=1800848171; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=q1mVf0QKYvPJ+4NSUc+0SqCKPiVImrf5Dhf0M/kxVrY=; b=OF9tUF/fV2deo3aWMzPrN+49388Apg20IDlI4x+8UTtp64WJMHzP07eP kYtO2qQTBqRMe2MPv7AX4KxpYoum2CzRIK9fbPq1GrvKNZ0BgRakIFF7t dmQhoxz9b7lQ+Tp+Ol79o3pda85UVZYPn4yi+RY/I0lWq6S37n0z5QEba JIn3gxb0yb0BN8IH6eAIQBneUUc0BautOXrACII+SBu6syJDgq6tTLyyr 7QlQwTKzPXTUDYsdJJdE04DWnWBi+qLFQAuZ3r1twBSH5OAOMouY9kP8K rqcnsVufYkumiXMh+ZwGp3uvh8b0SAD4h5gAt3N+NdTeaf856gKMwuDwu Q==; X-CSE-ConnectionGUID: qBc2TNEHRu2LFfwj54V1GQ== X-CSE-MsgGUID: 7rjT7Jq7RfODPeQKOFTOGQ== X-IronPort-AV: E=McAfee;i="6800,10657,11681"; a="81887588" X-IronPort-AV: E=Sophos;i="6.21,252,1763452800"; d="scan'208";a="81887588" Received: from fmviesa003.fm.intel.com ([10.60.135.143]) by fmvoesa104.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 24 Jan 2026 19:36:06 -0800 X-CSE-ConnectionGUID: 5/eD9vAJTqqE4jtBlE15YQ== X-CSE-MsgGUID: COri05SvQWSM2HYSqWh0YQ== X-ExtLoop1: 1 Received: from jf5300-b11a338t.jf.intel.com ([10.242.51.115]) by fmviesa003.fm.intel.com with ESMTP; 24 Jan 2026 19:36:05 -0800 From: Kanchana P Sridhar To: linux-kernel@vger.kernel.org, linux-mm@kvack.org, hannes@cmpxchg.org, yosry.ahmed@linux.dev, nphamcs@gmail.com, chengming.zhou@linux.dev, usamaarif642@gmail.com, ryan.roberts@arm.com, 21cnbao@gmail.com, ying.huang@linux.alibaba.com, akpm@linux-foundation.org, senozhatsky@chromium.org, sj@kernel.org, kasong@tencent.com, linux-crypto@vger.kernel.org, herbert@gondor.apana.org.au, davem@davemloft.net, clabbe@baylibre.com, ardb@kernel.org, ebiggers@google.com, surenb@google.com, kristen.c.accardi@intel.com, vinicius.gomes@intel.com, giovanni.cabiddu@intel.com Cc: wajdi.k.feghali@intel.com, kanchana.p.sridhar@intel.com Subject: [PATCH v14 19/26] crypto: iaa - Enable async mode and make it the default. Date: Sat, 24 Jan 2026 19:35:30 -0800 Message-Id: <20260125033537.334628-20-kanchana.p.sridhar@intel.com> X-Mailer: git-send-email 2.27.0 In-Reply-To: <20260125033537.334628-1-kanchana.p.sridhar@intel.com> References: <20260125033537.334628-1-kanchana.p.sridhar@intel.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 Content-Type: text/plain; charset="utf-8" This patch enables the 'async' sync_mode in the driver. Further, it sets the default sync_mode to 'async', which makes it easier for IAA hardware acceleration in the iaa_crypto driver to be loaded by default in the most efficient/recommended 'async' mode for parallel compressions/decompressions, namely, asynchronous submission of descriptors, followed by polling for job completions. Earlier, the "sync" mode used to be the default. The iaa_crypto driver documentation has been updated with these changes. This way, anyone who wants to use IAA as a zswap compressor, can do so right after building the kernel. Specifically, they *do not* have to go through these steps to use async mode: 1) disable all the IAA device/wq bindings that happen at boot time 2) rmmod iaa_crypto 3) modprobe iaa_crypto 4) echo async > /sys/bus/dsa/drivers/crypto/sync_mode 5) re-run initialization of the IAA devices and wqs Signed-off-by: Kanchana P Sridhar --- Documentation/driver-api/crypto/iaa/iaa-crypto.rst | 11 ++--------- drivers/crypto/intel/iaa/iaa_crypto_main.c | 4 ++-- 2 files changed, 4 insertions(+), 11 deletions(-) diff --git a/Documentation/driver-api/crypto/iaa/iaa-crypto.rst b/Documenta= tion/driver-api/crypto/iaa/iaa-crypto.rst index 0ff4ec603b43..d5e610ef4612 100644 --- a/Documentation/driver-api/crypto/iaa/iaa-crypto.rst +++ b/Documentation/driver-api/crypto/iaa/iaa-crypto.rst @@ -272,7 +272,7 @@ The available attributes are: echo async_irq > /sys/bus/dsa/drivers/crypto/sync_mode =20 Async mode without interrupts (caller must poll) can be enabled by - writing 'async' to it (please see Caveat):: + writing 'async' to it:: =20 echo async > /sys/bus/dsa/drivers/crypto/sync_mode =20 @@ -281,14 +281,7 @@ The available attributes are: =20 echo sync > /sys/bus/dsa/drivers/crypto/sync_mode =20 - The default mode is 'sync'. - - Caveat: since the only mechanism that iaa_crypto currently implements - for async polling without interrupts is via the 'sync' mode as - described earlier, writing 'async' to - '/sys/bus/dsa/drivers/crypto/sync_mode' will internally enable the - 'sync' mode. This is to ensure correct iaa_crypto behavior until true - async polling without interrupts is enabled in iaa_crypto. + The default mode is 'async'. =20 - g_comp_wqs_per_iaa =20 diff --git a/drivers/crypto/intel/iaa/iaa_crypto_main.c b/drivers/crypto/in= tel/iaa/iaa_crypto_main.c index 915bf9b17b39..f6e18f458fbf 100644 --- a/drivers/crypto/intel/iaa/iaa_crypto_main.c +++ b/drivers/crypto/intel/iaa/iaa_crypto_main.c @@ -153,7 +153,7 @@ static bool iaa_verify_compress =3D true; */ =20 /* Use async mode */ -static bool async_mode; +static bool async_mode =3D true; /* Use interrupts */ static bool use_irq; =20 @@ -207,7 +207,7 @@ static int set_iaa_sync_mode(const char *name) async_mode =3D false; use_irq =3D false; } else if (sysfs_streq(name, "async")) { - async_mode =3D false; + async_mode =3D true; use_irq =3D false; } else if (sysfs_streq(name, "async_irq")) { async_mode =3D true; --=20 2.27.0