From embedded-pv-devel-bounces@lists.xenproject.org Tue Jan 16 11:28:09 2018 Return-path: Envelope-to: archives@lists.xenproject.org Delivery-date: Tue, 16 Jan 2018 11:28:09 +0000 Received: from localhost ([127.0.0.1] helo=lists.xenproject.org) by lists.xenproject.org with esmtp (Exim 4.84_2) (envelope-from ) id 1ebPPU-00036I-Te; Tue, 16 Jan 2018 11:28:08 +0000 Received: from us1-rack-dfw2.inumbo.com ([104.130.134.6]) by lists.xenproject.org with esmtp (Exim 4.84_2) (envelope-from ) id 1ebL6V-0006Gc-Ay for embedded-pv-devel@lists.xenproject.org; Tue, 16 Jan 2018 06:52:15 +0000 X-Inumbo-ID: 9274346b-fa89-11e7-b4a6-bc764e045a96 Received: from APC01-PU1-obe.outbound.protection.outlook.com (unknown [2a01:111:f400:febe::724]) by us1-rack-dfw2.inumbo.com (Halon) with ESMTP id 9274346b-fa89-11e7-b4a6-bc764e045a96; Tue, 16 Jan 2018 07:50:43 +0100 (CET) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=tataelxsi.onmicrosoft.com; s=selector1-tataelxsi-co-in; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version; 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boundary="===============3250518590664708020==" Errors-To: embedded-pv-devel-bounces@lists.xenproject.org Sender: "Embedded-pv-devel" --===============3250518590664708020== Content-Language: en-US Content-Type: multipart/alternative; boundary="_000_HK2PR04MB162076BDCBFCBC19FA68CFD1CAEA0HK2PR04MB1620apcp_" --_000_HK2PR04MB162076BDCBFCBC19FA68CFD1CAEA0HK2PR04MB1620apcp_ Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable Hi, Does Xen support RCarH3 Starter Kit - https://elinux.org/R-Car/Boards/H3SK I followed the build procedures explained in this link for Salvator X - htt= ps://wiki.xenproject.org/wiki/Xen_ARM_with_Virtualization_Extensions/Salvat= or-X But the Yocto build instructions given in the link is for RcarH3 Starter ki= t.So I am unable to find Image-r8a7795-salvator-x-xen.dtb and xen-salvator-= x.uImage which is mentioned in the tutorial. Can anyone explain what can be the issue and the fix for it. Does the Xen d= tb and uImage for salvator will work on RCarH3 starter kit. Best Regards Ganesh.H --_000_HK2PR04MB162076BDCBFCBC19FA68CFD1CAEA0HK2PR04MB1620apcp_ Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable

Hi,

 

Does Xen support RCarH3 Starter Kit -  https://elinux.org/R-Car/Boards/H= 3SK

 

I followed the build procedures explained in this li= nk for Salvator X - https://wiki.xenproject.org/wiki/Xen_ARM_with_Virtualization_Extensions/Sal= vator-X

 

But the Yocto build instructions given in the link i= s for RcarH3 Starter kit.So I am unable to find Image-r8a7795-salvator-x-xe= n.dtb and xen-salvator-x.uImage which is mentioned in the tutorial.

Can anyone explain what can be the issue and the fix= for it. Does the Xen dtb and uImage for salvator will work on RCarH3 start= er kit.

 

Best Regards

Ganesh.H

 

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([2a02:c7f:ac18:da00:3d7c:a105:2ca9:a75c]) by smtp.gmail.com with ESMTPSA id 11sm2125710wmd.33.2018.01.16.06.46.20 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Tue, 16 Jan 2018 06:46:20 -0800 (PST) From: Lars Kurth Message-Id: Mime-Version: 1.0 (Mac OS X Mail 11.2 \(3445.5.20\)) Date: Tue, 16 Jan 2018 14:46:19 +0000 In-Reply-To: To: Saumya Rajesh References: X-Mailer: Apple Mail (2.3445.5.20) Cc: xen-devel , embedded-pv-devel@lists.xenproject.org, xen-users@lists.xenproject.org Subject: Re: [Embedded-pv-devel] [Xen-devel] Access I2C bus from guest/DomU on ARM board X-BeenThere: embedded-pv-devel@lists.xenproject.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Content-Type: multipart/mixed; boundary="===============1494991466273303865==" Errors-To: embedded-pv-devel-bounces@lists.xenproject.org Sender: "Embedded-pv-devel" --===============1494991466273303865== Content-Type: multipart/alternative; boundary="Apple-Mail=_3379ACE9-6F36-4F83-93F9-99801B2EC6F2" --Apple-Mail=_3379ACE9-6F36-4F83-93F9-99801B2EC6F2 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset=us-ascii Added embedded-pv-devel@lists.xenproject.org > On 16 Jan 2018, at 13:39, Saumya Rajesh = wrote: >=20 > Hi Xen community >=20 > I have built and brought up Xen 4.8 on Renesas RCar H3. For a specific = requirement, I need to use the I2C bus of the board from Domain U. Is = there a way to use the I2C bus from the guest? > I have looked into para-virtualization and passthrough [1][2] but = there isn't enough support or resources related to I2C bus sharing on = ARM. Any possible idea would be appreciated. >=20 > Regards > Saumya >=20 > [1] = https://lists.xenproject.org/archives/html/xen-users/2017-10/msg00019.html= = > [2] https://wiki.xenproject.org/wiki/File:DriverDomainonARM01.pdf = >=20 >=20 > _______________________________________________ > Xen-devel mailing list > Xen-devel@lists.xenproject.org > https://lists.xenproject.org/mailman/listinfo/xen-devel --Apple-Mail=_3379ACE9-6F36-4F83-93F9-99801B2EC6F2 Content-Transfer-Encoding: quoted-printable Content-Type: text/html; charset=us-ascii Added embedded-pv-devel@lists.xenproject.org

On 16 Jan 2018, at 13:39, Saumya Rajesh <saumyarajesh93@gmail.com> wrote:

Hi Xen community


I have = built and brought up Xen 4.8 on Renesas RCar H3. For a specific = requirement, I need to use the I2C bus of the board from Domain U. Is = there a way to use the I2C bus from the guest?
I have looked into = para-virtualization and passthrough [1][2] but there = isn't enough support or resources related to I2C bus sharing on = ARM. Any = possible idea would be appreciated.

Regards
Saumya

[1] https://lists.xenproject.org/archives/html/xen= -users/2017-10/msg00019.html
[2] https://wiki.xenproject.org/wiki/File:DriverDo= mainonARM01.pdf


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charset="utf-8" Content-Transfer-Encoding: base64 Errors-To: embedded-pv-devel-bounces@lists.xenproject.org Sender: "Embedded-pv-devel" RGVhciBBbmRyaWksDQoNClNvcnJ5IGZvciB0aGUgY29uZnVzaW9uLiBJIGFtIGhhdmluZyBhbiBS Q2FySDMgc3RhcnRlciBraXQuIElzIHRoZXJlIGEgWGVuIHBvcnQgYXZhaWxhYmxlIGZvciBSQ2Fy SDMgc3RhcnRlciBraXQgcmlnaHQgbm93Pw0KSWYgbm90IHdoYXQgYXJlIHRoZSBzdGVwcyB0byBj cmVhdGUgb25lPw0KDQpCZXN0IFJlZ2FyZHMNCkdhbmVzaC5IDQoNCg0KLS0tLS1PcmlnaW5hbCBN ZXNzYWdlLS0tLS0NCkZyb206IEFuZHJpaSBBbmlzb3YgW21haWx0bzphbmRyaWkuYW5pc292QGdt YWlsLmNvbV0gDQpTZW50OiBUdWVzZGF5LCBKYW51YXJ5IDE2LCAyMDE4IDc6MjIgUE0NClRvOiBH YW5lc2ggSCA8Z2FuZXNoLmhAdGF0YWVseHNpLmNvLmluPg0KQ2M6IHhlbi1kZXZlbEBsaXN0cy54 ZW5wcm9qZWN0Lm9yZzsgZW1iZWRkZWQtcHYtZGV2ZWxAbGlzdHMueGVucHJvamVjdC5vcmcNClN1 YmplY3Q6IFJlOiBbRW1iZWRkZWQtcHYtZGV2ZWxdIFhlbiBvbiBSQ2FySDMgU3RhcnRlciBLaXQN Cg0KRGVhciBHYW5lc2gsDQoNCkNvdWxkIHlvdSBwbGVhc2Ugc3BlY2lmeSB5b3VyIGV4YWN0IHRh cmdldCBib2FyZD8gSXMgaXQgc2FsdmF0b3IteCBvciBzdGFydGVyIGtpdCBwcmVtaWVyIChoM3Vs Y2IpPw0KQWN0dWFsbHkgUmVuZXNhcyBCU1AgMi4xOS4wIGlzIGVhc2lseSBiZWluZyBidWlsdCBm b3Igc2FsdmF0b3IteC4gSW4gc3RlcCA4IHlvdSBzaG91bGQgc2VsZWN0IGFuIGFwcHJvcHJpYXRl IGNvbmYgZnJvbSBgbWV0YS1yY2FyLWdlbjMvZG9jcy9zYW1wbGUvY29uZi9zYWx2YXRvci14L2Au DQoNCj4gQnV0IHRoZSBZb2N0byBidWlsZCBpbnN0cnVjdGlvbnMgZ2l2ZW4gaW4gdGhlIGxpbmsg aXMgZm9yIFJjYXJIMyANCj4gU3RhcnRlciBraXQuU28gSSBhbSB1bmFibGUgdG8gZmluZCBJbWFn ZS1yOGE3Nzk1LXNhbHZhdG9yLXgteGVuLmR0Yg0KWW91IHdvdWxkIG5vdCBmaW5kIGl0IGlmIHlv dSBidWlsZCBmb3IgdTN1bGNiIG1hY2hpbmUsIHRoaXMgaXMgcmVzdHJpY3RlZCBpbiB0aGUgcmVj aXBlIFsxXS4NCg0KPiBhbmQgeGVuLXNhbHZhdG9yLXgudUltYWdlIHdoaWNoIGlzIG1lbnRpb25l ZCBpbiB0aGUgdHV0b3JpYWwuDQpJIGd1ZXNzIGluIHlvdXIgYnVpbGQgaXQgaXMgbmFtZWQgeGVu LWgzdWxjYi51SW1hZ2UsIGl0IGlzIHNldCBpbiBhbm90aGVyIHJlY2lwZSBbMl0uDQoNCj4gRG9l cyB0aGUgWGVuIGR0YiBhbmQgdUltYWdlIGZvciBzYWx2YXRvciB3aWxsIHdvcmsgb24gUkNhckgz IHN0YXJ0ZXIga2l0Lg0KWGVuIGltYWdlIGlzIG1hY2hpbmUgYWdub3N0aWMuIFNhbHZhdG9yLVgg c3BlY2lmaWMgZHRiIGlzIG5vdCBzdWl0YWJsZSBmb3IgaDN1bGNiLg0KDQo+IENhbiBhbnlvbmUg ZXhwbGFpbiB3aGF0IGNhbiBiZSB0aGUgaXNzdWUgYW5kIHRoZSBmaXggZm9yIGl0Lg0KQWRkIGEg aDN1bGNiIGRldmljZSB0cmVlIHRvIFszXSwgdXBkYXRlIHJlY2lwZSBbMl0uDQpEbyBub3QgZm9y Z2V0IHRvIFBSIHRoZSBzdHVmZiB0byBvdXIgbWV0YS1kZW1vLg0KDQpbMV0gLSBodHRwczovL2dp dGh1Yi5jb20veGVuLXRyb29wcy9tZXRhLWRlbW8vYmxvYi9tYXN0ZXIvbWV0YS1yY2FyLWdlbjMt eGVuL3JlY2lwZXMta2VybmVsL2xpbnV4L2xpbnV4LXJlbmVzYXNfNC45LmJiYXBwZW5kI0wxMw0K DQpbMl0gLSBodHRwczovL2dpdGh1Yi5jb20veGVuLXRyb29wcy9tZXRhLWRlbW8vYmxvYi9tYXN0 ZXIvbWV0YS1yY2FyLWdlbjMteGVuL3JlY2lwZXMtZXh0ZW5kZWQveGVuL3hlbl9naXQuYmJhcHBl bmQjTDE3DQoNClszXSAtIGh0dHBzOi8vZ2l0aHViLmNvbS94ZW4tdHJvb3BzL21ldGEtZGVtby90 cmVlL21hc3Rlci9tZXRhLXJjYXItZ2VuMy14ZW4vcmVjaXBlcy1rZXJuZWwvbGludXgvbGludXgt cmVuZXNhcw0KDQpTaW5jZXJlbHksDQpBbmRyaWkgQW5pc292Lg0KDQoNCjIwMTgtMDEtMTYgODo1 MiBHTVQrMDI6MDAgR2FuZXNoICBIIDxnYW5lc2guaEB0YXRhZWx4c2kuY28uaW4+Og0KPiBIaSwN Cj4NCj4NCj4NCj4gRG9lcyBYZW4gc3VwcG9ydCBSQ2FySDMgU3RhcnRlciBLaXQgLSAgDQo+IGh0 dHBzOi8vZWxpbnV4Lm9yZy9SLUNhci9Cb2FyZHMvSDNTSw0KPg0KPg0KPg0KPiBJIGZvbGxvd2Vk IHRoZSBidWlsZCBwcm9jZWR1cmVzIGV4cGxhaW5lZCBpbiB0aGlzIGxpbmsgZm9yIFNhbHZhdG9y IFggDQo+IC0gDQo+IGh0dHBzOi8vd2lraS54ZW5wcm9qZWN0Lm9yZy93aWtpL1hlbl9BUk1fd2l0 aF9WaXJ0dWFsaXphdGlvbl9FeHRlbnNpb24NCj4gcy9TYWx2YXRvci1YDQo+DQo+DQo+DQoNCj4N Cj4gQ2FuIGFueW9uZSBleHBsYWluIHdoYXQgY2FuIGJlIHRoZSBpc3N1ZSBhbmQgdGhlIGZpeCBm b3IgaXQuIERvZXMgdGhlIA0KPiBYZW4gZHRiIGFuZCB1SW1hZ2UgZm9yIHNhbHZhdG9yIHdpbGwg d29yayBvbiBSQ2FySDMgc3RhcnRlciBraXQuDQo+DQo+DQo+DQo+IEJlc3QgUmVnYXJkcw0KPg0K PiBHYW5lc2guSA0KPg0KPg0KPg0KPg0KPiBfX19fX19fX19fX19fX19fX19fX19fX19fX19fX19f X19fX19fX19fX19fX19fXw0KPiBFbWJlZGRlZC1wdi1kZXZlbCBtYWlsaW5nIGxpc3QNCj4gRW1i ZWRkZWQtcHYtZGV2ZWxAbGlzdHMueGVucHJvamVjdC5vcmcNCj4gaHR0cHM6Ly9saXN0cy54ZW5w cm9qZWN0Lm9yZy9tYWlsbWFuL2xpc3RpbmZvL2VtYmVkZGVkLXB2LWRldmVsDQpfX19fX19fX19f X19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fXwpFbWJlZGRlZC1wdi1kZXZlbCBt YWlsaW5nIGxpc3QKRW1iZWRkZWQtcHYtZGV2ZWxAbGlzdHMueGVucHJvamVjdC5vcmcKaHR0cHM6 Ly9saXN0cy54ZW5wcm9qZWN0Lm9yZy9tYWlsbWFuL2xpc3RpbmZvL2VtYmVkZGVkLXB2LWRldmVs From embedded-pv-devel-bounces@lists.xenproject.org Wed Jan 17 15:18:46 2018 Return-path: Envelope-to: archives@lists.xenproject.org Delivery-date: Wed, 17 Jan 2018 15:18:46 +0000 Received: from localhost ([127.0.0.1] helo=lists.xenproject.org) by lists.xenproject.org with esmtp (Exim 4.84_2) (envelope-from ) id 1ebpUE-00024x-O4; 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boundary="===============5937674793921811398==" Errors-To: embedded-pv-devel-bounces@lists.xenproject.org Sender: "Embedded-pv-devel" --===============5937674793921811398== Content-Type: multipart/alternative; boundary="001a114eb4601ac9820562f95016" --001a114eb4601ac9820562f95016 Content-Type: text/plain; charset="UTF-8" On Tue, Jan 16, 2018 at 9:22 PM, Andrii Anisov wrote: > Dear Rajesh, > > > You can try to get an I2C bus controller in DomU in PIO mode following > [1], keeping in mind [2]. > > If you want it DMA capable you need Renesas IPMMU support in XEN [3], [4] > to be incorporated. > > > [1] - https://xenbits.xen.org/docs/unstable/misc/arm/passthrough.txt > > [2] - https://lists.xenproject.org/archives/html/xen-users/2017-10 > /msg00031.html > > [3] - https://lists.xenproject.org/archives/html/xen-devel/2017-07 > /msg02545.html > > [4] - https://lists.xenproject.org/archives/html/xen-devel/2017-07 > /msg02679.html > > > -- > > *Andrii Anisov* > > > Thank you Andrii for replying. I will try the device passthrough way of using I2C bus from guest and post the updates. Just out of curiosity, is it possible to split the Driver for the Renesas RCar I2C unit [1] into frontend and backend to use the i2c bus from guest? Or to do something similar to PCI passthrough? Please forgive me if I sound illogical. I'm just curious. Regards Saumya [1] https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable.git/tree/drivers/i2c/busses/i2c-rcar.c?h=v4.14.13 --001a114eb4601ac9820562f95016 Content-Type: text/html; charset="UTF-8" Content-Transfer-Encoding: quoted-printable
On T= ue, Jan 16, 2018 at 9:22 PM, Andrii Anisov <andrii_anisov@epam.com> wrote:
De= ar Rajesh,


You can try to get an I2C bus controller in DomU in PIO mode following [1],= keeping in mind [2].

If you want it DMA capable you need Renesas IPMMU support in XEN [3], [4] t= o be incorporated.


[1] - https://xenbits.xen.org/docs/unstable/misc/arm/passthrough.txt

[2] - https://lists.xenpro= ject.org/archives/html/xen-users/2017-10/msg00031.html

[3] - https://lists.xenpro= ject.org/archives/html/xen-devel/2017-07/msg02545.html

[4] - https://lists.xenpro= ject.org/archives/html/xen-devel/2017-07/msg02679.html


--

*Andrii Anisov*



Thank you Andrii fo= r replying. I will try the device passthrough way of using I2C bus from gue= st and post the updates.=C2=A0

Just out of curiosity, is it possible to sp= lit the Driver for the Renesas RCar I2C unit [1] into frontend and backend = to use the i2c bus from guest? Or to do something similar to PCI passthroug= h? Please forgive me if I sound illogical. I'm just curious.

<= /div>
Regards
Sau= mya
[1] https://g= it.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable.git/tree/drivers= /i2c/busses/i2c-rcar.c?h=3Dv4.14.13
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Please forgive me if I so= und >> illogical. I'm just curious. >> > I guess you could implement PV I2C using FE/BE scheme. With enormous > efforts and unpredictable results. > But I'm sure it is not what you really need. > > -- > > *Andrii Anisov* > > > =E2=80=8BHi Andrii Actually I am planning to set up Android as guest in Xen. In order to enable sound in the Android guest, I need to passthrough the audio codec device which communicates through the I2C bus. For BE/FE scheme, I think sharing the internal DMA and clock would pose problems. So I'm going to go ahead with the device passthrough way. Any thoughts or inputs you can possibly give regarding this use case will be very helpful and valuable. Regards Saumya=E2=80=8B --001a113e410c4d6053056308368b Content-Type: text/html; charset="UTF-8" Content-Transfer-Encoding: quoted-printable
On Wed, Jan 17, 201= 8 at 9:06 PM, Andrii Anisov <andrii_anisov@epam.com> wrote:
Rajesh,<= span class=3D"gmail-">

On 17.01.18 16:03, Saumya Rajesh wrote:
Just out of curiosity, is it possible to split the Driver for the Renesas R= Car I2C unit [1] into frontend and backend to use the i2c bus from guest? O= r to do something similar to PCI passthrough? Please forgive me if I sound = illogical. I'm just curious.
I guess you could implement PV I2C using FE/BE scheme. With enormous effort= s and unpredictable results.
But I'm sure it is not what you really need.

--

*Andrii Anisov*



=E2= =80=8BHi Andrii

<= div class=3D"gmail_default">Actually I am= planning to set up Android as guest in Xen. In order to enable sound in th= e Android guest, I need to passthrough the audio codec device which communi= cates through the I2C bus. For BE/FE scheme, I think sharing the internal D= MA and clock would pose problems. So I'm going to go ahead with the dev= ice passthrough way.=C2=A0

Any thoughts or inputs you can possibly giv= e regarding this use case will be very helpful and valuable.

Regards
S= aumya=E2=80=8B<= /div>
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Wed, 31 Jan 2018 15:06:27 +0000 X-Inumbo-ID: 4620b44b-0698-11e8-ba59-bc764e045a96 Received: from EUR03-AM5-obe.outbound.protection.outlook.com (unknown [2a01:111:f400:fe08::60c]) by us1-rack-dfw2.inumbo.com (Halon) with ESMTP id 4620b44b-0698-11e8-ba59-bc764e045a96; Wed, 31 Jan 2018 16:06:12 +0100 (CET) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=epam.com; s=selector1; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version; bh=34H6OYe2UhixyZzIDyiVUYnu07Q6Ao5WyBovDJlK1eM=; b=kWzcwEVuyqpl0gIm8ROJEAqXwoVud7VVoJcBJuoOr5j8HYOgJ3xT5hhfTz6khF77jOLVfCw7OfY/XU5ikYhXqEg6vqO8GXBFA+4779E3MWmvl+OAlE5He37j7j+rbeKLmMj9/2VmCmv0GQp6k4EU0LDHFVDFOIpdegbSsL04bAM= Authentication-Results: spf=none (sender IP is ) smtp.mailfrom=Andrii_Anisov@epam.com; Received: from [10.17.180.109] (85.223.209.51) by DB6PR0301MB2408.eurprd03.prod.outlook.com (2603:10a6:4:59::13) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA384_P256) id 15.20.444.14; Wed, 31 Jan 2018 15:06:19 +0000 To: Saumya Rajesh References: <37217807-7f20-bdbf-f852-033fcae1bd01@epam.com> From: Andrii Anisov Message-ID: <74fb0cae-875a-d93b-233c-8819b3d89d8e@epam.com> Date: Wed, 31 Jan 2018 17:06:10 +0200 User-Agent: Mozilla/5.0 (X11; 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