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Fri, 7 Oct 2022 06:41:57 +0000 (UTC) Received: from dovecot-director2.suse.de ([192.168.254.65]) by imap2.suse-dmz.suse.de with ESMTPSA id VkUHCDXKP2P2SQAAMHmgww (envelope-from ); Fri, 07 Oct 2022 06:41:57 +0000 X-Outflank-Mailman: Message body and most headers restored to incoming version X-BeenThere: xen-devel@lists.xenproject.org List-Id: Xen developer discussion List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Errors-To: xen-devel-bounces@lists.xenproject.org Precedence: list Sender: "Xen-devel" X-Inumbo-ID: 237b29e6-460b-11ed-964a-05401a9f4f97 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=suse.com; s=susede1; t=1665124917; h=from:from:reply-to:date:date:message-id:message-id:to:to:cc:cc: mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=ubZ+4Ck86Ph/G26SuwNF8h0CjJlNbh0F0U0WIgCgLNk=; b=u0B1gOZKRfVtDSiWXK3FHZ+7ZuhS2wNNXD2scXaLTkjdp0U2MWi81cz5CIcqR4f3bUYv8g jBnNrjXqx/FvjTozEfvlu2sla1YODh2H6SsLXM8Wx9NXvu+jcHK0gNago1wWy0qFR2qe/S z8XGz3kjUOzbP5zxy3/AUWO6neU04g0= From: Juergen Gross To: linux-kernel@vger.kernel.org Cc: Juergen Gross , Stefano Stabellini , Oleksandr Tyshchenko , xen-devel@lists.xenproject.org Subject: [PATCH v2 2/3] xen/virtio: use dom0 as default backend for CONFIG_XEN_VIRTIO_FORCE_GRANT Date: Fri, 7 Oct 2022 08:41:42 +0200 Message-Id: <20221007064143.10049-3-jgross@suse.com> X-Mailer: git-send-email 2.35.3 In-Reply-To: <20221007064143.10049-1-jgross@suse.com> References: <20221007064143.10049-1-jgross@suse.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-ZohoMail-DKIM: pass (identity @suse.com) X-ZM-MESSAGEID: 1665124939329100003 Content-Type: text/plain; charset="utf-8" With CONFIG_XEN_VIRTIO_FORCE_GRANT set the default backend domid to 0, enabling to use xen_grant_dma_ops for those devices. Signed-off-by: Juergen Gross Reviewed-by: Oleksandr Tyshchenko Acked-by: Stefano Stabellini --- drivers/xen/grant-dma-ops.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/drivers/xen/grant-dma-ops.c b/drivers/xen/grant-dma-ops.c index 646ca913c05c..c703b77b33c9 100644 --- a/drivers/xen/grant-dma-ops.c +++ b/drivers/xen/grant-dma-ops.c @@ -349,6 +349,9 @@ void xen_grant_setup_dma_ops(struct device *dev) if (dev->of_node) { if (xen_dt_grant_init_backend_domid(dev, data)) goto err; + } else if (IS_ENABLED(CONFIG_XEN_VIRTIO_FORCE_GRANT)) { + dev_info(dev, "Using dom0 as backend\n"); + data->backend_domid =3D 0; } else { /* XXX ACPI device unsupported for now */ goto err; --=20 2.35.3