From nobody Mon Feb 9 10:24:26 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 7A03314AD0D; Wed, 29 Jan 2025 14:04:14 +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=1738159454; cv=none; b=IXmfNoVEAGHSmc3v9b72SONXm7CJH2hxNjL7WLEBIuVcYlbiY0vKncQKxXT45oDqXdHze3+6K9E5k/9JWEzMyrTKGUOPQSPcjmxq0524aF6fYFxKyK8eSol9g7EIPRSX0kArosLOFFGrB/8VYUQ0oVz0vGqSeeKMDqvLde5GqiM= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1738159454; c=relaxed/simple; bh=6uHuE31SFgCh8Tk5sWIhV+CwlgPPY3qcX2ZkNicPk1M=; h=From:To:Cc:Subject:Date:Message-Id:MIME-Version; b=lQfnXB/U2I6yJR7DwpVCD3yeI4sli5Sl8DZKhbvLZLalJ4KRomNytn5i4UDY0Bak44OWsdfiE1uhDUurc3dIYy5ULcFGaddm2mBlchRMo25oP2FibROlbRrkIxTqFmzI61COIs+hlsW8VfxqgVB8GnekMlpr6XRU4YwaQsmwyKQ= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=NBo8ZZeM; 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="NBo8ZZeM" Received: by smtp.kernel.org (Postfix) with ESMTPSA id A81EAC4CED1; Wed, 29 Jan 2025 14:04:11 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1738159454; bh=6uHuE31SFgCh8Tk5sWIhV+CwlgPPY3qcX2ZkNicPk1M=; h=From:To:Cc:Subject:Date:From; b=NBo8ZZeMfKwapvBpHo2tLE1gbJv0qH4qVRcDb40Wyd8PbkNwiHSuoGt0T3rLX1v2c cWANpPkFLKiZivazf9g6wvOJbY00ON0LOr9YBYVANVjkIuKBpNk5E7qWlSrk6FpjK+ HgKoJFHDtUeFrWjXtkYsytRBk09Qxz/+bYSV2dtl08rvnIT9oV9Vi7eBGuR4kAUF70 DeixB1QFgbM7AUF03Ew9dnPA/vH8sGy15VCutLPA2WSSD25/PPsDFlkkjc/qsINC+C upBWYT+qCHqeSPOPduLUb3X3+PgjnmE3cr+FQAbtW3vKfe96YPUVBu7iRxlDxrsESY vHZ8LD6uE2gnw== From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Ramesh Thomas , Jason Gunthorpe , Alex Williamson , Sasha Levin , jgg@ziepe.ca, Yunxiang.Li@amd.com, gbayer@linux.ibm.com, bpsegal@us.ibm.com, ankita@nvidia.com, kvm@vger.kernel.org Subject: [PATCH AUTOSEL 5.4] vfio/pci: Enable iowrite64 and ioread64 for vfio pci Date: Wed, 29 Jan 2025 08:00:29 -0500 Message-Id: <20250129130031.1273301-1-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 5.4.289 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 83f81d24df78e..94e3fb9f42243 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 "vfio_pci_private.h" =20 --=20 2.39.5