From nobody Mon Feb 9 10:24:08 2026 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 983A21DF974; Wed, 29 Jan 2025 14:03:58 +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=1738159438; cv=none; b=hQPmkP5Y25CyYDQRCJx8ERw/C+AAZEi07blDlRIHnPLDUPjiNO+i5xTpQybvIsJFnPr0haJtfaYV0FwQ+QLvREptImelNRAUQnKjaGF/kjHzAcYpNjX824p3zcDAUR4nstkHCi2ckXPOc0LRQtLmtVjmHcDrSRdt0eaB/G0aOD4= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1738159438; c=relaxed/simple; bh=+BbjqapLWgwNwtRu+pif92ucwcNIIB21ijmEwEHHLks=; h=From:To:Cc:Subject:Date:Message-Id:MIME-Version; b=D/LDK7RUYFoWe5hbmmxIpLd276dYHPjcvhDRcdmSEFN00bt6qNIv+xxzP8y8xI0VdMUgW0gLEgQthz3iui/lRJ12VMBNfmvWA/hpA8BeCu6NL67gp+gboWPRQo/9dJkfDVd3B2CKMi0fB7fGt1LYGq79jHdim8zBAQoolPCOjJY= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=nLYZ+7H8; 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="nLYZ+7H8" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 44282C4CED1; Wed, 29 Jan 2025 14:03:56 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1738159438; bh=+BbjqapLWgwNwtRu+pif92ucwcNIIB21ijmEwEHHLks=; h=From:To:Cc:Subject:Date:From; b=nLYZ+7H8nn4WeVGhniA4lGk8B1nfWc3EAEIamTYS9vGwh3e6vIFsGgiq59WNvD9jr ndoKi8Y0qcIac4Z1CtDs18HIv7ZVpHpWk/U1eDiBaQjMiw6ab07g/EzCui+KhuNuSt O9XDn+NrvsDX7/do5LDMlSZPssGZs9liB4z+Zo3IGIkaKaC8yANf0nUH309KWZjORu rPs+F+1qSXMUaPwDw+B3947oEjo53/5tgZs3u9P36szNvJM8qMiNsOz3W2u9Rqke1a 0CpeLHI53jrZoSa3i4k//SzTn+3h0MZrxcUlR6Ybbt3uiioC12rcY8X5VChOsdph2a TMVQHX7Ehw0hQ== From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Ramesh Thomas , Jason Gunthorpe , Alex Williamson , Sasha Levin , gbayer@linux.ibm.com, Yunxiang.Li@amd.com, jgg@ziepe.ca, ankita@nvidia.com, bpsegal@us.ibm.com, kvm@vger.kernel.org Subject: [PATCH AUTOSEL 5.15] vfio/pci: Enable iowrite64 and ioread64 for vfio pci Date: Wed, 29 Jan 2025 08:00:13 -0500 Message-Id: <20250129130015.1273244-1-sashal@kernel.org> X-Mailer: git-send-email 2.39.5 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-stable: review X-Patchwork-Hint: Ignore X-stable-base: Linux 5.15.177 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" From: Ramesh Thomas [ Upstream commit 2b938e3db335e3670475e31a722c2bee34748c5a ] Definitions of ioread64 and iowrite64 macros in asm/io.h called by vfio pci implementations are enclosed inside check for CONFIG_GENERIC_IOMAP. They don't get defined if CONFIG_GENERIC_IOMAP is defined. Include linux/io-64-nonatomic-lo-hi.h to define iowrite64 and ioread64 macros when they are not defined. io-64-nonatomic-lo-hi.h maps the macros to generic implementation in lib/iomap.c. The generic implementation does 64 bit rw if readq/writeq is defined for the architecture, otherwise it would do 32 bit back to back rw. Note that there are two versions of the generic implementation that differs in the order the 32 bit words are written if 64 bit support is not present. This is not the little/big endian ordering, which is handled separately. This patch uses the lo followed by hi word ordering which is consistent with current back to back implementation in the vfio/pci code. Signed-off-by: Ramesh Thomas Reviewed-by: Jason Gunthorpe Link: https://lore.kernel.org/r/20241210131938.303500-2-ramesh.thomas@intel= .com Signed-off-by: Alex Williamson Signed-off-by: Sasha Levin --- drivers/vfio/pci/vfio_pci_rdwr.c | 1 + 1 file changed, 1 insertion(+) diff --git a/drivers/vfio/pci/vfio_pci_rdwr.c b/drivers/vfio/pci/vfio_pci_r= dwr.c index 82ac1569deb05..e45c15e210ffd 100644 --- a/drivers/vfio/pci/vfio_pci_rdwr.c +++ b/drivers/vfio/pci/vfio_pci_rdwr.c @@ -16,6 +16,7 @@ #include #include #include +#include =20 #include =20 --=20 2.39.5