From nobody Fri Dec 19 17:01:53 2025 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 5F97C1DAC46; Wed, 4 Sep 2024 13:18:13 +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=1725455893; cv=none; b=BPigS4Ypk8FyxDoODvUg2cQC24avUOHi2fBIxm5c4mhe8wkoC2Yb1jvrp3KTYx3jBP2jYf8/vC+Q7x9fXzJEUla3r+mXAJlhphurYJPDvD/tLC4Wio+ReYsm5+9Kk+rOaPDdjMIrD+Mr+KIktz6JpnXUeec60Id9lu7sRlFKxYQ= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1725455893; c=relaxed/simple; bh=ZQzu5Awk7csrIQP8WA5EilsMPXyklmrTn+/ECQpc/IE=; h=From:Date:Subject:MIME-Version:Content-Type:Message-Id:References: In-Reply-To:To:Cc; b=p4Ztb2BEln1OQWAI6V/Zok4zt2NN0GS573xrFXx5WPhO8n1paz1WYTCKyMyBJnOHhUyikGTnlV/GE4yXdYI+eFD9N+WUF6q0DiXyDM+PesYgEfEPKvRtJpjX4j8zWVdVDevrc1nbPzcJvpnUiYu+URnqwC3Fb5pu1WBSWNwVkEI= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=WfcIuRxc; 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="WfcIuRxc" Received: by smtp.kernel.org (Postfix) with ESMTPS id 11B7AC4CED2; Wed, 4 Sep 2024 13:18:13 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1725455893; bh=ZQzu5Awk7csrIQP8WA5EilsMPXyklmrTn+/ECQpc/IE=; h=From:Date:Subject:References:In-Reply-To:To:Cc:Reply-To:From; b=WfcIuRxcmVKJvYDlPNuC/F/wjV/Oci38S3Dg/CJfmLZLkQl3jDyxJLcpSW2Vp1sKs 9vn/0mwhQsGFfnOmesIGNGtpLp6G7FDkwV+wwX30l4rznmLqsAt3KqRUmo0/eeQmuh +61gkHOrlKfu8YrAS/HWXmD7bWKXd84js7tHRkIii2KpKpCd52YO2+8mzn+nPTpLA4 xdJqWr/16lSrOz3azXYSY+aay5xmfdN+S6ZS7u/xh9ps4OVcutpyc7oU6IwE3JORyk PIs0pmRCxULEG5yt7P9z7Vj/xJ/+nReZZyKgvQIa7b4ax49pd0NjFhoVV7HZ/TQkOP f1sk+XDKbdZPA== Received: from aws-us-west-2-korg-lkml-1.web.codeaurora.org (localhost.localdomain [127.0.0.1]) by smtp.lore.kernel.org (Postfix) with ESMTP id 08017CD37B4; Wed, 4 Sep 2024 13:18:13 +0000 (UTC) From: Joel Granados via B4 Relay Date: Wed, 04 Sep 2024 15:17:17 +0200 Subject: [PATCH 6/6] iommu/vt-d: drop pasid requirement for prq initialization Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable Message-Id: <20240904-jag-iopfv8-v1-6-e3549920adf3@samsung.com> References: <20240904-jag-iopfv8-v1-0-e3549920adf3@samsung.com> In-Reply-To: <20240904-jag-iopfv8-v1-0-e3549920adf3@samsung.com> To: David Woodhouse , Lu Baolu , Joerg Roedel , Will Deacon , Robin Murphy , Jason Gunthorpe , Kevin Tian , Klaus Jensen Cc: linux-kernel@vger.kernel.org, iommu@lists.linux.dev, Joel Granados , Klaus Jensen X-Mailer: b4 0.15-dev-00a43 X-Developer-Signature: v=1; a=openpgp-sha256; l=1454; i=j.granados@samsung.com; h=from:subject:message-id; bh=GQ979ruQ4vAANRiiIGnsASOC26gBsL07Le0pjm1OYPs=; b=owJ4nAHtARL+kA0DAAoBupfNUreWQU8ByyZiAGbYXhKOqYL08HTDL5U1FS6YKVJeseJUwf3VA Vyg9JiqiavFWYkBswQAAQoAHRYhBK5HCVcl5jElzssnkLqXzVK3lkFPBQJm2F4SAAoJELqXzVK3 lkFPhwEMAJc0ezgHDa2U5drkdjhqFE9iQKVk3KUkm+9m70jbOA8N+95R9S36RYtpryTYFwjSTxS K3HNBVSj5Dfm1iz/uLNGPW71ImEuyoD+f9JveefAD8sN93nSlSykCrlFxmzKhVoM7rl9ZNJQ6Bq 6uIRRXA36olvwExRfh4pzkSA0IkNgj7ZRo690ffXGX7kY6BZkNHwTzWvrhswLPNUuL0UHCTi5LL D3O57Rq1BNiXC+/qUiYHKqmOdvHY9j7P1iYeXF1ZRqJG4G26BssP3kXmKkqP5bN0Isvk28PF16n F3QwHAW2KXPG+qOdm4JTI6/HZF+xBNjoJfq/sTkIKrJ5eo1NLMKacQA4SGqIR6YtEra0SlWb+w9 IvzME5R8OQuzOvnYhsfW6Fzwm2COK9juCNiITfiDH11K2h60XZ+48dYiTrs0Lq2BQ9hxRyPzpUe vlwFzoPVwkBXhUnA9kmWOa8FcbpKyKJ/ZsOVlLhBz38EpWnBlm4779t0Ic0hvwiyUeckIp4wj94 W8= X-Developer-Key: i=j.granados@samsung.com; a=openpgp; fpr=F1F8E46D30F0F6C4A45FF4465895FAAC338C6E77 X-Endpoint-Received: by B4 Relay for j.granados@samsung.com/default with auth_id=70 X-Original-From: Joel Granados Reply-To: j.granados@samsung.com From: Klaus Jensen PASID support within the IOMMU is not required to enable the Page Request Queue, only the PRS capability. Signed-off-by: Klaus Jensen Signed-off-by: Joel Granados --- drivers/iommu/intel/iommu.c | 10 ++++------ 1 file changed, 4 insertions(+), 6 deletions(-) diff --git a/drivers/iommu/intel/iommu.c b/drivers/iommu/intel/iommu.c index 3d1c971eb9e5..9f3bbdbd6372 100644 --- a/drivers/iommu/intel/iommu.c +++ b/drivers/iommu/intel/iommu.c @@ -1487,10 +1487,8 @@ static void free_dmar_iommu(struct intel_iommu *iomm= u) /* free context mapping */ free_context_table(iommu); =20 - if (pasid_supported(iommu)) { - if (ecap_prs(iommu->ecap)) - intel_finish_prq(iommu); - } + if (ecap_prs(iommu->ecap)) + intel_finish_prq(iommu); } =20 /* @@ -2480,7 +2478,7 @@ static int __init init_dmars(void) =20 iommu_flush_write_buffer(iommu); =20 - if (pasid_supported(iommu) && ecap_prs(iommu->ecap)) { + if (ecap_prs(iommu->ecap)) { /* * Call dmar_alloc_hwirq() with dmar_global_lock held, * could cause possible lock race condition. @@ -2921,7 +2919,7 @@ static int intel_iommu_add(struct dmar_drhd_unit *dma= ru) intel_iommu_init_qi(iommu); iommu_flush_write_buffer(iommu); =20 - if (pasid_supported(iommu) && ecap_prs(iommu->ecap)) { + if (ecap_prs(iommu->ecap)) { ret =3D intel_enable_prq(iommu); if (ret) goto disable_iommu; --=20 2.43.0