[Linaro-open-discussions] Re: 回复：Re: 回复：Li =?utf-8?Q?naro-open-discussions_call_on_May___24th

Hi,

I am traveling, I am interested on the SPDM discussions, I did not think there is much left to do wrt IORT RMR (other than merging it and decide who does that) but we can talk on thursday, just use lorenzo.pieralisi@gmail.com please to send the invite.

If we can talk week starting July 4th honestly it would even be better.

Thanks, Lorenzo

________________________________________ From: joyce.qi--- via Linaro-open-discussions linaro-open-discussions@op-lists.linaro.org Sent: 24 June 2022 11:33 To: Shameerali Kolothum Thodi; Jonathan Cameron; Lorenzo Pieralisi Cc: Jonathon Burcham; yangyicong; Hesham Almatary; shenyang (M); tangchengchang; Dietmar Eggemann; linaro-open-discussions@op-lists.linaro.org Subject: [Linaro-open-discussions] 回复：Re: 回复：Li =?utf-8?Q?naro-open-discussions_call_on_May___24th

Hi Jonanthan，Shameerali， Thanks a lot for your input here：） @Lorenzo， Are you available on next Thuesday’s LOD meeting for checking the status on IORT RMR series Shameerali has brought up？ Thanks：） Joyce

-------- 原始邮件 -------- 发件人： Shameerali Kolothum Thodi shameerali.kolothum.thodi@huawei.com 日期： 2022年6月24日周五 傍晚5:24 收件人： Jonathan Cameron jonathan.cameron@huawei.com, joyce.qi@linaro.org, Lorenzo Pieralisi lpieralisi@kernel.org 抄送： Jonathon Burcham jon.burcham@linaro.org, yangyicong yangyicong@huawei.com, Hesham Almatary hesham.almatary@huawei.com, "shenyang (M)" shenyang39@huawei.com, tangchengchang tangchengchang@huawei.com, Dietmar Eggemann dietmar.eggemann@arm.com, linaro-open-discussions@op-lists.linaro.org 主 题： RE: [Linaro-open-discussions] Re: 回复：Li =?utf-8?Q?naro-open-discussions_call_on_May___24th

-----Original Message----- From: Jonathan Cameron via Linaro-open-discussions [mailto:linaro-open-discussions@op-lists.linaro.org] Sent: 24 June 2022 10:13 To: joyce.qi@linaro.org Cc: Jonathan Cameron via Linaro-open-discussions linaro-open-discussions@op-lists.linaro.org; Jonathon Burcham jon.burcham@linaro.org; yangyicong yangyicong@huawei.com; Hesham Almatary hesham.almatary@huawei.com; shenyang (M) shenyang39@huawei.com; tangchengchang tangchengchang@huawei.com; Dietmar Eggemann dietmar.eggemann@arm.com Subject: [Linaro-open-discussions] Re: 回复：Linaro-open-discussions

call on

May 24th

Hi Joyce,

Thanks for the reminder. I don’t think it is worth discussing at

LOD as not

the right people on the call, but I would like to draw attention to a

thread

discussing whether to propose a SPDM BoF at Linux Plumbers: https://lore.kernel.org/linux-cxl/20220609124702.000037b0@Huawei.com/

At the moment I plan to speculatively put in a proposal, but may

withdraw it

if not enough people would be involved to make useful progress. The big ‘discussion’ point is how much to do in kernel vs in

Userspace.

I’ve just polled some of my colleagues for any other topics they

would like to

raise on LOD, but for now I don’t have anything ready to talk about.

If Lorenzo is around, would like to check the status on IORT RMR series. I have sent out the v13 here, https://lore.kernel.org/linux-acpi/20220615101044.1972-8-shameerali.kol othum.thodi@huawei.com/T/ Thanks, Shameer

Thanks,

Jonathan

From: joyce.qi@linaro.org joyce.qi@linaro.org Sent: 24 June 2022 10:06 To: Jonathan Cameron jonathan.cameron@huawei.com Cc: Jonathan Cameron via Linaro-open-discussions linaro-open-discussions@op-lists.linaro.org; Lorenzo Pieralisi lorenzo.pieralisi@arm.com; Jonathon Burcham

jon.burcham@linaro.org;

yangyicong yangyicong@huawei.com; Hesham Almatary hesham.almatary@huawei.com; shenyang (M) shenyang39@huawei.com; tangchengchang tangchengchang@huawei.com; Dietmar Eggemann dietmar.eggemann@arm.com Subject: 回复：[Linaro-open-discussions] Linaro-open-discussions call on May 24th

Hi Jonanthan，all

Do you have anything to sync during next week's LOD meeting?

Thanks Joyce

-------- 原始邮件 -------- 发件人： Joyce Qi <joyce.qi@linaro.orgmailto:joyce.qi@linaro.org> 日期： 2022年5月24日周二 早上7:08 收件人： Jonathan Cameron <jonathan.cameron@huawei.commailto:jonathan.cameron@huawei.com> 抄送： Jonathan Cameron via Linaro-open-discussions

<linaro-open-discussions@op-lists.linaro.org<mailto:linaro-open-discuss ions

@op-lists.linaro.org>>, Lorenzo Pieralisi <lorenzo.pieralisi@arm.commailto:lorenzo.pieralisi@arm.com>,

Jonathon

Burcham <jon.burcham@linaro.orgmailto:jon.burcham@linaro.org>, yangyicong <yangyicong@huawei.commailto:yangyicong@huawei.com>, Hesham Almatary <hesham.almatary@huawei.commailto:hesham.almatary@huawei.com>, "shenyang (M)" <shenyang39@huawei.commailto:shenyang39@huawei.com>, tangchengchang <tangchengchang@huawei.commailto:tangchengchang@huawei.com>, Dietmar Eggemann <dietmar.eggemann@arm.commailto:dietmar.eggemann@arm.com> 主 题： Re: [Linaro-open-discussions] Linaro-open-discussions call on

May

24th Hi Jonathan,all

Thanks for the confirm. I will cancel today’s meeting since no topic:)

Thanks:) Joyce

在 2022年5月20日，下午7:10，Jonathan Cameron <jonathan.cameron@huawei.commailto:jonathan.cameron@huawei.com> 写道：

Hi Joyce,

Nothing to discuss from me. Anyone else have anything they want to

bring

up?

Thanks,

Jonathan

From: Joyce Qi <joyce.qi@linaro.orgmailto:joyce.qi@linaro.org> Sent: 18 May 2022 10:37 To: Jonathan Cameron <jonathan.cameron@huawei.commailto:jonathan.cameron@huawei.com> Cc: Jonathan Cameron via Linaro-open-discussions

<linaro-open-discussions@op-lists.linaro.org<mailto:linaro-open-discuss ions

@op-lists.linaro.org>>; Lorenzo Pieralisi <lorenzo.pieralisi@arm.commailto:lorenzo.pieralisi@arm.com>;

Jonathon

Burcham <jon.burcham@linaro.orgmailto:jon.burcham@linaro.org>; yangyicong <yangyicong@huawei.commailto:yangyicong@huawei.com>; Hesham Almatary <hesham.almatary@huawei.commailto:hesham.almatary@huawei.com>; shenyang (M) <shenyang39@huawei.commailto:shenyang39@huawei.com>; tangchengchang <tangchengchang@huawei.commailto:tangchengchang@huawei.com>; Dietmar Eggemann <dietmar.eggemann@arm.commailto:dietmar.eggemann@arm.com> Subject: Re: [Linaro-open-discussions] Linaro-open-discussions call

on May

24th

Hi Jonathan, Lorenz ,all,

Do you have any topic to discuss during the Linaro open discussions

next

Tuesday?

Thanks:) Joyce

在 2022年4月26日，上午1:45，Jonathan Cameron <Jonathan.Cameron@huawei.commailto:Jonathan.Cameron@huawei.com> 写道：

On Fri, 22 Apr 2022 14:00:06 +0100 Jonathan Cameron via Linaro-open-discussions

<linaro-open-discussions@op-lists.linaro.org<mailto:linaro-open-discuss ions

@op-lists.linaro.org>> wrote:

On Fri, 22 Apr 2022 11:33:29 +0100 Lorenzo Pieralisi <lorenzo.pieralisi@arm.commailto:lorenzo.pieralisi@arm.com> wrote:

On Fri, Apr 22, 2022 at 10:36:43AM +0100, Jonathan Cameron wrote: On Thu, 21 Apr 2022 21:32:01 +0800 Joyce Qi via Linaro-open-discussions

<linaro-open-discussions@op-lists.linaro.org<mailto:linaro-open-discuss ions

@op-lists.linaro.org>> wrote:

Hi Jonathon锟斤拷Lorenzo锟斤拷

Do we have some topic to discuss for the Linaro-open-disscussions

next

week?

Thanks:) Joyce

Hi Joyce,

Thanks for the reminder. So topics:

RMR: Nothing from our side

vCPUHP: we have a 'working' QEMU tree though it has some known problems (doesn't work with SVE for some reason - so some debugging

to

do). Should be able to upload that shortly for anyone else who wants to play with it. Any updates on progress of kernel patches from ARM side would be good but email is fine for that.

Could not work on them, I need to figure out a plan and quickly, we can talk about that though, I should be able to have a clearer picture by Tuesday.

I am still using your SPDM stack and there are a couple of things I don't get (eg CHALLENGE_AUTH signature verification, RSA path, spdm_asym_rsassa_3072 path in spdm_verify_signature() - just wanted to ask if you tested this path, I am struggling with signature verification - just wanted to ask in particular about the need for ASN.1 encoding to use verify_signature()).

Tested this again and it seems to be working (tm)

Here are the logs... Just in case you fancy hand decoding the

exchange.

Sig should be the very last bit of the last message (ignoring the 00

pad IIRC)

Platform Port Transmit Command: 00 00 00 01 Platform Port Transmit TransportType: 00 00 00 02 Platform Port Transmit Size: 00 00 00 0c Platform Port Transmit Buffer: 01 00 01 00 03 00 00 00 10 84 00 00 Platform Port Receive Command: 00 00 00 01 Platform Port Receive TransportType: 00 00 00 02 Platform Port Receive Size: 00 00 00 14 Platform Port Receive Buffer: 01 00 01 00 05 00 00 00 10 04 00 00 00

03 00

10 00 11 00 12 Platform Port Transmit Command: 00 00 00 01 Platform Port Transmit TransportType: 00 00 00 02 Platform Port Transmit Size: 00 00 00 0c Platform Port Transmit Buffer: 01 00 01 00 03 00 00 00 10 84 00 00 Platform Port Receive Command: 00 00 00 01 Platform Port Receive TransportType: 00 00 00 02 Platform Port Receive Size: 00 00 00 14 Platform Port Receive Buffer: 01 00 01 00 05 00 00 00 10 04 00 00 00

03 00

10 00 11 00 12 Platform Port Transmit Command: 00 00 00 01 Platform Port Transmit TransportType: 00 00 00 02 Platform Port Transmit Size: 00 00 00 14 Platform Port Transmit Buffer: 01 00 01 00 05 00 00 00 11 e1 00 00

00 02

00 00 c6 f7 00 00 Platform Port Receive Command: 00 00 00 01 Platform Port Receive TransportType: 00 00 00 02 Platform Port Receive Size: 00 00 00 14 Platform Port Receive Buffer: 01 00 01 00 05 00 00 00 11 61 00 00 00

00 00

00 f7 fb 00 00 Platform Port Transmit Command: 00 00 00 01 Platform Port Transmit TransportType: 00 00 00 02 Platform Port Transmit Size: 00 00 00 38 Platform Port Transmit Buffer: 01 00 01 00 0e 00 00 00 11 e3 04 00

30 00

01 00 94 00 00 00 03 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00

00

00 00 02 20 1b 00 03 20 06 00 04 20 94 00 05 20 01 00 Platform Port Receive Command: 00 00 00 01 Platform Port Receive TransportType: 00 00 00 02 Platform Port Receive Size: 00 00 00 3c Platform Port Receive Buffer: 01 00 01 00 0f 00 00 00 11 63 04 00 34

00

01 00 08 00 00 00 04 00 00 00 02 00 00 00 00 00 00 00 00 00 00 00 00

00

00 00 00 00 00 00 02 20 10 00 03 20 02 00 04 20 04 00 05 20 01 00 Platform Port Transmit Command: 00 00 00 01 Platform Port Transmit TransportType: 00 00 00 02 Platform Port Transmit Size: 00 00 00 0c Platform Port Transmit Buffer: 01 00 01 00 03 00 00 00 11 81 00 00 Platform Port Receive Command: 00 00 00 01 Platform Port Receive TransportType: 00 00 00 02 Platform Port Receive Size: 00 00 00 9c Platform Port Receive Buffer: 01 00 01 00 27 00 00 00 11 01 00 07 6b

3e 6a

85 12 30 ed ec 1e 27 0e 6e 96 b0 95 68 eb b0 1f 9a 7a 63 f6 bd 04 0d

04 cc

45 0a 03 b9 aa d6 e7 1b 7e 85 04 ae 18 55 8d 47 58 c4 cd 59 6b 3e 6a

85 12

30 ed ec 1e 27 0e 6e 96 b0 95 68 eb b0 1f 9a 7a 63 f6 bd 04 0d 04 cc

45 0a

03 b9 aa d6 e7 1b 7e 85 04 ae 18 55 8d 47 58 c4 cd 59 6b 3e 6a 85 12

30 ed

ec 1e 27 0e 6e 96 b0 95 68 eb b0 1f 9a 7a 63 f6 bd 04 0d 04 cc 45 0a

03 b9

aa d6 e7 1b 7e 85 04 ae 18 55 8d 47 58 c4 cd 59 Platform Port Transmit Command: 00 00 00 01 Platform Port Transmit TransportType: 00 00 00 02 Platform Port Transmit Size: 00 00 00 10 Platform Port Transmit Buffer: 01 00 01 00 04 00 00 00 11 82 00 00 00

00 00

80 Platform Port Receive Command: 00 00 00 01 Platform Port Receive TransportType: 00 00 00 02 Platform Port Receive Size: 00 00 04 10 Platform Port Receive Buffer: 01 00 01 00 04 01 00 00 11 02 00 00 00

04 64

0a 64 0e 00 00 99 e0 d4 22 35 22 e5 ba 58 24 e7 1e eb cf 9a 2c b5 b5

71 10

ce aa 50 f5 64 83 78 d8 2d 9e 3b 99 53 74 db 98 d0 6f 63 cd 84 35 c5

10 cc

21 f3 e0 30 82 05 19 30 82 03 01 a0 03 02 01 02 02 14 22 4d 06 18 d5

d4

a8 45 bf 5d f5 56 06 47 3f 90 a9 20 21 27 30 0d 06 09 2a 86 48 86 f7

0d 01

01 0c 05 00 30 1c 31 1a 30 18 06 03 55 04 03 0c 11 69 6e 74 65 6c 20

74 65

73 74 20 52 53 41 20 43 41 30 1e 17 0d 32 32 30 33 30 33 31 31 33 38

34

32 5a 17 0d 33 32 30 32 32 39 31 31 33 38 34 32 5a 30 1c 31 1a 30 18

06

03 55 04 03 0c 11 69 6e 74 65 6c 20 74 65 73 74 20 52 53 41 20 43 41

30

82 02 22 30 0d 06 09 2a 86 48 86 f7 0d 01 01 01 05 00 03 82 02 0f 00

30 82

02 0a 02 82 02 01 00 b6 80 53 6e c7 66 9e 23 0f e9 2a d4 68 59 54 ec

bc cd

dd 1d 37 52 f9 fb 48 ed 9b 8e e5 20 77 a0 57 26 ba a4 e4 44 95 9c 13

30 36

b8 03 39 33 58 4f 0f 19 5f 28 21 ee 52 f4 b0 4c 7b c1 86 94 ed 12 cf

1b 24

d2 20 d8 6a 7b 33 86 3e 84 b8 0e 57 06 14 fb ff a5 a7 05 ca 75 0c b2

f0 d7

58 d0 b5 92 de ff a5 82 54 90 35 60 f3 c8 8f 2f 16 5f 89 91 5b 42 14

04 23

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d3 7b

9a b4 0e 3a b7 08 19 6f c2 7c 14 0f a3 3e fa ad 99 71 35 a5 fc ef c1

31 93 ae

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55 42

4b 3c 8a 5e c9 bb 10 8a 6e 62 2d bc d6 29 de cf ae 2b f8 66 e0 a8 0e

9a 86

e5 dd fc 85 ae 9c a9 28 a0 7d e8 93 7f cf 1b e2 7a d0 d4 c0 3c 92 88

06 ba

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da 71

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35 4d

e1 a7 18 b9 d8 be fb 49 5f a7 51 20 08 e7 43 2b 81 ae da 7f 67 82 50

a7 4d

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72 37

2d 8d ca 57 10 d4 b5 cc 35 95 18 76 aa 20 dc 5f 45 b8 19 98 9f b7 94

8f 05

9e 3e f8 ee 51 7d 23 47 20 29 07 fa d4 d6 c2 28 4a 79 6a b3 3b ec c3

64 ee

78 4c d2 72 95 74 5b 8c 90 25 d4 11 68 89 fe bc 8e e4 a3 fa d6 b4 6c

46 63

31 99 25 06 5a 30 85 4a 0e 22 38 b7 33 07 65 11 1b 12 88 0b 71 37 20

2b

54 00 43 30 24 e9 22 98 1b 6d 6c da 98 02 8d 36 6b 08 1f 03 90 e4 bb

dc 0b

c4 3d b0 00 93 ab d9 11 6f da 04 32 48 3c 61 d0 d6 7b 5d 72 f8 3c 85

65 9f

b6 c0 5f 0d a7 1e d6 ad d8 0a a1 70 1f b8 3a f8 8b 4b 99 02 03 01 00

01 a3

53 30 51 30 1d 06 03 55 1d 0e 04 16 04 14 b3 c1 9a d7 32 bf 99 6b 9f

77 8a

11 f4 fc 24 92 43 f7 f7 ec 30 1f 06 03 55 1d 23 04 18 30 16 80 14 b3

c1 9a

d7 32 bf 99 6b 9f 77 8a 11 f4 fc 24 92 43 f7 f7 ec 30 0f 06 03 55 1d

13 01 01

ff 04 05 30 03 01 01 ff 30 0d 06 09 2a 86 48 86 f7 0d 01 01 0c 05 00

03 82

02 01 00 72 e2 8c aa 49 24 3f e9 53 a6 15 6d a0 da ed b8 ac d7 9b fd

9b 19

e3 e1 b4 27 36 79 24 63 03 0b f5 55 6c 22 cc 81 a7 1f 8c 90 d1 3e f8

cd f1

79 8a ae 1f 4c aa 2b 6a 1b a5 4d cf fe 71 44 96 f6 f1 c6 d7 6d 38 a5

fd 95 49

fb cb 0f c9 c6 6a 5f d1 85 ff ba e5 cb ef f8 43 de 7e ac 92 2c b3 2c

57 a6 39

f8 d2 ae c4 06 e8 3d 35 01 e7 30 51 74 e2 28 a2 6f 10 69 3d d8 96 d8

61 f5

ff d3 29 86 26 e2 57 23 dc 8d 77 1a 31 f0 6f df a7 50 34 28 4a e3 de

55 d0

a2 6f 8a db a1 54 7a ac 9f d3 e8 c5 1f 55 2c 2e fc 37 c9 4c a1 22 a4

e4 20 77

Platform Port Transmit Command: 00 00 00 01 Platform Port Transmit TransportType: 00 00 00 02 Platform Port Transmit Size: 00 00 00 10 Platform Port Transmit Buffer: 01 00 01 00 04 00 00 00 11 82 00 00 00

04 64

0a Platform Port Receive Command: 00 00 00 01 Platform Port Receive TransportType: 00 00 00 02 Platform Port Receive Size: 00 00 04 10 Platform Port Receive Buffer: 01 00 01 00 04 01 00 00 11 02 00 00 00

04 64

06 84 86 e0 3e 11 8b 72 c3 92 16 95 d5 32 0f 81 3d d1 0e d0 f8 3a e6

20 fe

d8 ae 5a c1 27 2c 18 1f 60 40 fa 89 10 05 33 f7 35 9d 5c 35 29 0d b3

26 94

48 eb 75 a3 d5 a8 74 22 80 56 40 cc 74 60 c1 03 d5 32 5d 3d 24 4c b3

5e b2

f5 5b 61 f1 d7 fa 40 71 45 af 67 c5 fc 5a ee 32 10 5f eb 6c 68 be 00

e1 0a e9

23 0d 06 6d fb b8 af 3a 9a 33 d1 b0 eb 89 5f c9 26 ba b8 91 ab cd 55

90 24

22 1b 3b 15 11 fe 61 22 de ae d7 19 45 b1 bf 09 09 2f c7 8f 57 b1 2b

37 b5

9d 4d f2 8b 2d ea 29 f5 17 bb 11 2f 5b 59 1b 43 65 d1 60 15 b9 ba ca

0b a4

bd 25 ec ba 5d 55 45 ab 02 2d fb 16 3e d6 82 01 a7 62 1a c7 77 77 da

5f 4d

f2 a2 f5 14 24 e8 ab 63 16 a4 5d f0 ec 5e 1c 9a 72 a2 86 dd 2b ba 88

d5 98

56 c7 1c 63 2e 59 eb 4a a7 df 55 7e 0c 77 ae de 9b 88 e2 93 47 27 62

c7 d4

0e 5d a4 16 05 ca 78 bd b9 67 d9 e7 c1 c8 41 23 94 de ae 5f e7 b6 50

76 d5

4d d5 ce d6 b5 d4 78 53 c0 18 6d 7f c5 f0 34 29 ba 9a 14 ba f2 13 07

4a 0f

e9 bd 1b fa 4e 20 4c 73 5e eb 9a 6d 3c bb 3b 61 e7 bf 71 cc c0 7a d2

bf a7

26 b9 9a bc 2d a0 22 18 12 1d 04 87 30 82 04 a0 30 82 02 88 a0 03 02

01

02 02 01 01 30 0d 06 09 2a 86 48 86 f7 0d 01 01 0c 05 00 30 1c 31 1a

30 18

06 03 55 04 03 0c 11 69 6e 74 65 6c 20 74 65 73 74 20 52 53 41 20 43

41

30 1e 17 0d 32 32 30 33 30 33 31 31 34 30 30 33 5a 17 0d 33 32 30 32

32

39 31 31 34 30 30 33 5a 30 2b 31 29 30 27 06 03 55 04 03 0c 20 69 6e

74

65 6c 20 74 65 73 74 20 52 53 41 20 69 6e 74 65 72 6d 65 64 69 61 74

65

20 63 65 72 74 30 82 01 a2 30 0d 06 09 2a 86 48 86 f7 0d 01 01 01 05

00

03 82 01 8f 00 30 82 01 8a 02 82 01 81 00 ab 97 02 85 a7 a4 8c 17 29

31 0c

b2 0d f6 e4 3d 76 00 ce e1 1b 19 9b e9 84 f5 36 10 1f d5 e6 60 fe 8a

e4 0a

53 63 23 7c f8 57 8d 7f 2b a8 10 78 dd 40 ef a8 65 33 47 a4 fc b6 f8

23 b3

4b 28 8e c8 98 29 02 55 93 54 35 5d 2c fd d8 a4 5d 02 bb c5 06 61 72

cb 77

a1 f6 ed 83 68 ec 4f a7 17 4b 29 89 52 40 9a f3 09 20 1e 4d e1 98 37

70 de

7c b9 77 2a 77 3d 41 e3 09 e4 d2 57 87 4b de 19 b9 c7 74 bc ec ac 98

b0 0e

2e 36 1e f7 8d 05 ab d4 a2 2b 0b fc a3 61 8d 08 bb ce 74 0a a1 d4 b6

38 80

ab a8 be f3 d1 5d 5f 6e cd c7 4b af 85 2f a5 e1 5e 74 0c c8 be a2 67

98 c7

61 45 d7 2a ee 88 93 4f d5 ef 83 11 dc 37 a0 38 20 97 c9 24 c3 3a 26

69 90

1e da 97 87 51 55 33 ef bc 13 b8 68 e8 da e0 68 53 90 11 03 83 43 85

f6 69

7c d7 07 d4 51 72 94 f5 44 02 7c cb bf 2e f0 1c d7 5b ac ab a7 ac 35

b7 f4

19 cc 78 86 b6 ac 38 17 b3 37 09 5d b5 3f 65 e1 a8 7e 7b 42 0d cb 24

e9 3d

fc d8 06 2e bc b3 1b 1c 2f 26 cf d2 24 f4 f7 7b 22 fd f1 6a 4e a9 73

0a ea c5

11 b9 d3 07 57 f6 b7 d4 df 66 2a 84 7b ec 0b 77 93 69 d6 06 e1 96 97

4c 7e

72 51 be a4 d1 d6 41 33 d8 69 41 f8 3f 57 44 48 82 ad 34 26 e1 2f f6

d4 fd

dd 6f a7 e1 55 69 5c 64 a6 a2 a1 70 aa 6f dd a0 cb 3c 9f ce 87 13 02

03 01

00 01 a3 5e 30 5c 30 0c 06 03 55 1d 13 04 05 30 03 01 01 ff 30 0b 06

03 55

1d 0f 04 04 03 02 01 fe 30 1d 06 03 55 1d 0e 04 16 04 14 c1 3f 34 2e

d9 40

de 6a 8d b4 45 ed 8a a0 6b b6 73 03 2b e5 30 20 06 03 55 1d 25 01 01

ff 04

16 30 14 06 08 2b 06 01 05 05 07 03 01 06 08 2b 06 01 05 05 07 03 02

30

0d 06 09 2a 86 48 86 f7 0d 01 01 0c 05 00 03 82 02 01 00 7d 96 9d 42

20 f4

5c 80 19 d9 31 Platform Port Transmit Command: 00 00 00 01 Platform Port Transmit TransportType: 00 00 00 02 Platform Port Transmit Size: 00 00 00 10 Platform Port Transmit Buffer: 01 00 01 00 04 00 00 00 11 82 00 00 00

08 64

06 Platform Port Receive Command: 00 00 00 01 Platform Port Receive TransportType: 00 00 00 02 Platform Port Receive Size: 00 00 04 10 Platform Port Receive Buffer: 01 00 01 00 04 01 00 00 11 02 00 00 00

04 64

02 d9 f4 22 2b c9 ea 52 0f 3e a8 e1 fb 87 b9 28 8a c6 70 32 5f a5 4e

a9 a2

22 ed 38 36 69 38 20 07 81 f2 b0 80 b6 05 5f b3 26 8b 60 08 ac fa db

78 08

20 c7 c5 3c 70 85 b8 e3 3c 81 45 3e 2b d9 6f e9 bf bf b9 d7 59 bd 80

46 87

08 f8 72 1e 44 b6 c4 17 2e 0e fe 51 28 d3 a5 d4 18 7e b6 64 ba 45 4f

bc 51

dd 38 70 e7 1f 0f 07 4d 75 b5 3e 2c 95 ca 11 0b a7 12 0f 25 8d ed 0a

4b 6f

96 e2 14 22 2d f7 96 64 6a c9 3a eb 09 71 89 ae 8d 82 2e 31 d6 46 58

6c 85

3b dc 14 1f c3 5c b3 02 fe ef 26 f1 8a d3 70 50 88 45 bd c8 f7 57 24

1b ef 01

8b 84 42 30 bb 1b 51 f4 e5 c2 02 6f ae 42 1d 4c a8 08 b2 75 c8 9b 6c

6f 75

e9 97 4a b3 f3 17 54 90 3b 1d c1 c7 e7 08 8a 88 5f 42 67 b5 04 4d 4f

b8 b9

5f 60 69 3a 1b 6a ee 39 3d 72 09 c4 80 5e 89 15 12 87 39 68 63 7c 65

ed b4

f1 12 d9 b9 82 30 74 0b aa 40 14 e0 33 f7 98 af 31 db e8 81 62 92 e6

fc 9b

6b 88 f9 cc c1 e4 6f 95 d2 86 f2 34 8f 48 c7 37 45 8e 25 07 26 f7 18

75 04

12 e6 16 6f 50 09 26 c9 8e 36 3e 41 6d 90 d0 31 13 e9 47 3c c9 c4 f3

c1 b0

1c 20 1c c8 95 4d 18 8d 46 83 35 fa 95 03 36 88 68 55 df a3 8d 79 9b

eb 16

bf 88 38 10 db 8c c2 f1 20 1b 36 a7 3b 44 26 bd c1 29 7f 02 98 a7 31

aa cd

60 c7 ee 15 a4 b2 be 66 07 47 ea 89 95 5f 32 c6 bf 2e b5 66 46 5a e1

79 f2

cd 4a 39 e0 9d f1 74 2f 00 6b e4 60 20 88 f0 53 83 26 6d ee ac a6 f6

54 47

e2 7a 58 a6 29 1d c7 50 a9 91 0c 68 ff fd 7b 25 a2 f3 34 b2 15 bd f4

7d cf 9e

f1 4c 0d 86 39 b2 3e 80 e9 94 15 55 c8 af 8c d2 a9 6e 61 ce e5 23 22

dc 4e

b8 1c 41 68 7a b2 30 23 1c f2 6e 22 2e bd cc 6a 99 0b 1b eb 58 05 1c

04 c3

30 82 04 6b 30 82 02 d3 a0 03 02 01 02 02 01 03 30 0d 06 09 2a 86 48

86

f7 0d 01 01 0c 05 00 30 2b 31 29 30 27 06 03 55 04 03 0c 20 69 6e 74

65 6c

20 74 65 73 74 20 52 53 41 20 69 6e 74 65 72 6d 65 64 69 61 74 65 20

63

65 72 74 30 1e 17 0d 32 32 30 33 30 33 31 31 34 30 32 34 5a 17 0d 33

32

30 32 32 39 31 31 34 30 32 34 5a 30 28 31 26 30 24 06 03 55 04 03 0c

1d

69 6e 74 65 6c 20 74 65 73 74 20 52 53 41 20 72 65 73 70 6f 6e 64 65

72 20

63 65 72 74 30 82 01 a2 30 0d 06 09 2a 86 48 86 f7 0d 01 01 01 05 00

03

82 01 8f 00 30 82 01 8a 02 82 01 81 00 a3 d7 6e f3 b7 4f 50 46 6c 67

7f 61

1a 30 85 a7 5a 8d b9 1f 29 76 86 57 5c cd 5c 20 fe b3 74 59 20 69 5e

8f de

22 cb a8 e9 f0 fb 3a 1a 45 be ef 50 46 b3 fc fe 74 ea e5 9d 0e 8d 3e

b8 13 a5

d2 7b 67 49 f6 6b 2d 7c 97 64 d1 24 ae c4 25 3f bf 67 9a 27 5d 72 df

23 87

d9 53 ba 8d de a7 3d cd e4 1c 9f 66 50 f4 e0 b7 96 97 36 2b 1a f6 38

d8 7e

0e c4 70 bc 7c 00 4a 74 89 9b 62 a5 82 d9 6a 69 b7 23 aa 74 9e ef 7c

b9 59

12 4c 8f 4e a2 42 5c d1 32 54 39 ea ca 64 e0 33 50 6c df f5 12 8e 1c

3d 51

fe da b8 57 6e 7b 42 2d b6 ec 21 92 af 08 f2 89 c8 19 a4 d5 32 56 62

c2 a3

f5 cc ec d4 eb 07 74 28 a5 5c 0b 1c 7a 4e 03 3a d5 c8 4e 39 25 4a 9b

ce 9a

63 1a 15 2c 98 4b 64 04 2c 9b 7d 92 32 36 33 60 8b ec 2c a8 5d 95 74

06 3f

83 cb 62 12 84 b8 dd 68 eb 1c 18 6b 84 cc b6 ef 4f a8 3b e1 0f 0a 09

46 c6

0f fe 24 55 8c 85 a1 3d 37 b1 ff 29 55 5b 23 f1 91 df cc 9d 38 48 72

0a 55

b7 45 42 25 c3 05 67 b4 bc 17 cd fd a3 7b 1c e4 d8 b1 8b 42 b2 47 1b

b7 99

4d 8a fd fe 52 80 94 58 e0 81 37 9a 91 61 93 e4 49 5e 69 16 32 4c 03

7c 42

2e d1 Platform Port Transmit Command: 00 00 00 01 Platform Port Transmit TransportType: 00 00 00 02 Platform Port Transmit Size: 00 00 00 10 Platform Port Transmit Buffer: 01 00 01 00 04 00 00 00 11 82 00 00 00

0c 64

02 Platform Port Receive Command: 00 00 00 01 Platform Port Receive TransportType: 00 00 00 02 Platform Port Receive Size: 00 00 02 74 Platform Port Receive Buffer: 01 00 01 00 9d 00 00 00 11 02 00 00 64

02 00

00 74 4f e8 47 58 28 7f 27 57 6b 66 80 29 5e cb b2 b2 a3 61 29 77 55

2f 44

6e 47 c8 c5 93 ec 90 96 55 fc 6b 27 03 2a 9e ef 28 b5 49 05 02 03 01

00 01

a3 81 9c 30 81 99 30 0c 06 03 55 1d 13 01 01 ff 04 02 30 00 30 0b 06

03 55

1d 0f 04 04 03 02 05 e0 30 1d 06 03 55 1d 0e 04 16 04 14 86 f9 ed fa

46 3d

7b 2b 5c 16 29 72 c6 b2 4b af b9 b2 8b df 30 31 06 03 55 1d 11 04 2a

30 28

a0 26 06 0a 2b 06 01 04 01 83 1c 82 12 01 a0 18 0c 16 41 43 4d 45 3a

57

49 44 47 45 54 3a 31 32 33 34 35 36 37 38 39 30 30 2a 06 03 55 1d 25

01

01 ff 04 20 30 1e 06 08 2b 06 01 05 05 07 03 01 06 08 2b 06 01 05 05

07 03

02 06 08 2b 06 01 05 05 07 03 09 30 0d 06 09 2a 86 48 86 f7 0d 01 01

0c

05 00 03 82 01 81 00 81 69 45 3a 56 b5 12 ee 27 57 12 e1 bd 60 b6 ca

c6 a4

d1 67 8c 8a e4 7c 9f e2 6f 9d b0 6e 6e e1 5d d8 b6 53 ac fb 68 d3 ee

55 fc

04 69 ba 33 8d a0 9b cd 2c 6e a4 fd 04 0e ac 5c d4 2f ce d1 89 d9 7e

a1 e1

b4 0c 7c 79 bd 2c 51 50 2a 01 7d 06 82 87 f0 1c f3 72 3b 14 6c 45 e0

6b 25

88 27 8e cb ec 21 98 c0 09 da 78 cc e7 39 10 0d d4 1a c2 0c 6d 31 2e

3a 5f

34 f9 ea 5c 10 c1 90 3a a1 ff 46 7d 16 77 a6 7c b7 f5 ce bf 57 6a 73

e0 bf f7

22 ba 57 d4 a0 b5 67 8c 1e 8c 9c 9b e6 ee 9a 0b 75 69 26 ce 78 de 24

21 85

99 22 95 c5 fd a3 8a 1d c8 96 80 6a 26 aa c3 59 d9 de a7 31 03 59 78

58 db

c3 7d 0e 3f 97 50 b4 0f 53 41 0d 4b dd 66 8d bb 57 b6 f7 f7 fb 43 9e

25 3c

bc fa 20 84 bc 5d f8 71 3b af 6a e1 b1 84 41 d5 17 00 1d 9d 83 59 b2

ce bd

40 5a ba c6 52 45 2c 49 ff 10 d4 a1 e9 19 11 b5 3a 87 cc 74 76 f6 4d

07 92

f1 98 53 07 96 89 9e 6c 70 cf 2e 2c 7d f1 dd d3 26 0a a8 39 23 1f 5c

60 e7

32 13 61 04 94 f9 ff 21 2a 00 9c c8 e7 e7 53 ef e0 73 25 be f0 7d f9

bd 49

08 dd c0 1b 68 67 87 a2 8f 8b ed 95 12 dd 01 fc ac 10 b7 d3 60 dc 03

2e 8d

ee 9b 85 1c 56 d5 a8 1d bb 0b 75 91 d7 b9 5d b5 f8 57 4f c5 4e 02 34

76 a4

cd b9 42 c4 58 de 57 dc 75 31 e3 6c 2e 65 d0 Platform Port Transmit Command: 00 00 00 01 Platform Port Transmit TransportType: 00 00 00 02 Platform Port Transmit Size: 00 00 00 2c

//This is the challenge auth. Platform Port Transmit Buffer: 01 00 01 00 0b 00 00 00 11 83 00 00 af

2c d9

aa cb 59 67 ce 3f 7b 8f a5 26 00 4e 1f 1c 4e c3 1e 31 06 be 0d 9e 4f

f8 b1 7c

2a 39 89 Platform Port Receive Command: 00 00 00 01 Platform Port Receive TransportType: 00 00 00 02 Platform Port Receive Size: 00 00 01 e0 Platform Port Receive Buffer: 01 00 01 00 78 00 00 00 11 03 80 01 6b

3e 6a

85 12 30 ed ec 1e 27 0e 6e 96 b0 95 68 eb b0 1f 9a 7a 63 f6 bd 04 0d

04 cc

45 0a 03 b9 aa d6 e7 1b 7e 85 04 ae 18 55 8d 47 58 c4 cd 59 61 17 8f

cf a6

2d 0d e2 aa 90 91 06 7c 8e 3b 8b a7 64 7c 72 09 b2 9c 89 5b f1 30 47

e7 5b

07 58 00 00 9c 43 d9 7b a3 ae c7 d4 bd 5e a8 db 74 b3 81 97 10 6e 2f

22 5a

26 c0 09 02 43 1d c1 3b dd cf e8 13 33 ff dc 02 39 15 2b 98 16 b5 eb

8e 63

32 5a 3e 2a 6a 00 96 8e 42 5d 11 46 a6 7e d5 a8 76 11 94 2c a8 2c c7

6d 48

94 80 a0 fd 9a 7e 4a 84 59 c0 25 17 7d 0f d5 0d 93 75 02 1e 61 ef 5e

5d 06

80 64 4d 6a 47 91 c7 b1 ca e3 d5 ab b3 6c 97 8a f0 56 39 e6 3d a0 ad

96 20

14 43 fc 83 5d 21 08 78 e8 85 69 a0 d2 e6 9a c9 a9 f6 96 66 ee 80 a6

06 a6

a6 ee cb 9b 7c e4 65 5f a5 0c 5a d9 5e de 50 d1 ab 73 8b c4 f7 3a f2

62 59

27 16 fa 42 1b e1 db 19 76 a8 40 06 25 d3 28 54 bf dd d4 75 1e 4f 40

d0 c4

3e 1e 60 e7 4b 9b c9 c8 98 db a4 74 8f 86 39 ae 76 9c f9 c9 fe 63 ef

34 ab

4d 0b 14 22 d0 d6 9e a3 fd 12 ab c3 7c 61 fd ea 09 dc 2d ad 78 6e ce

13 2b

95 36 83 34 3a 1b ef d3 fd 07 de b2 df c7 7a 83 bd 6e ab 51 70 99 4e

28 07

de 63 42 ab 81 96 79 7f 30 27 28 4a 3e a1 8f 42 5f 7d cd 8f ec 86 e0

ea 2b

fb 05 c2 ce ce 69 ae 4e 5c dd 95 85 11 23 a3 80 85 40 65 e3 a1 92 18

9a dc

31 ac 13 24 a3 a9 b9 5c 95 f5 b5 b5 08 ee 7d d8 ff 44 42 77 c4 09 25

35 7c

b4 0b 64 77 ea 74 19 b7 b0 c1 04 6d 42 7e ab 32 91 e5 b1 59 2d 60 31

11 5f

38 52 36 d0 ba c0 73 d5 fb 5c b6 82 a1 00 00

from spdm_emu last message is better formatted.

SpdmReceiveRequest[0] (0x24): 0000: 11 83 00 00 af 2c d9 aa cb 59 67 ce 3f 7b 8f a5 26 00 4e 1f 1c

4e c3

1e 31 06 be 0d 9e 4f f8 b1 0020: 7c 2a 39 89 SpdmSendResponse[0] ... m1m2 hash - 6b c2 91 d6 c1 fe 1c 5e c9 bf 04 f6 fd 0f b1 58 9d 56 d3

af 69

08 3b eb 06 ba 6d b0 d2 e2 33 46 8a d8 ff 4d 9a 44 13 d2 04 57 e9 b9

ce b7

b2 05 SpdmSendResponse[0] (0x1d6): 0000: 11 03 80 01 6b 3e 6a 85 12 30 ed ec 1e 27 0e 6e 96 b0 95 68 eb

b0 1f

9a 7a 63 f6 bd 04 0d 04 cc 0020: 45 0a 03 b9 aa d6 e7 1b 7e 85 04 ae 18 55 8d 47 58 c4 cd 59 61

17 8f

cf a6 2d 0d e2 aa 90 91 06 0040: 7c 8e 3b 8b a7 64 7c 72 09 b2 9c 89 5b f1 30 47 e7 5b 07 58 00

00 9c

43 d9 7b a3 ae c7 d4 bd 5e 0060: a8 db 74 b3 81 97 10 6e 2f 22 5a 26 c0 09 02 43 1d c1 3b dd cf

e8 13

33 ff dc 02 39 15 2b 98 16 0080: b5 eb 8e 63 32 5a 3e 2a 6a 00 96 8e 42 5d 11 46 a6 7e d5 a8 76

11 94

2c a8 2c c7 6d 48 94 80 a0 00a0: fd 9a 7e 4a 84 59 c0 25 17 7d 0f d5 0d 93 75 02 1e 61 ef 5e 5d

06 80

64 4d 6a 47 91 c7 b1 ca e3 00c0: d5 ab b3 6c 97 8a f0 56 39 e6 3d a0 ad 96 20 14 43 fc 83 5d 21

08 78

e8 85 69 a0 d2 e6 9a c9 a9 00e0: f6 96 66 ee 80 a6 06 a6 a6 ee cb 9b 7c e4 65 5f a5 0c 5a d9 5e

de 50

d1 ab 73 8b c4 f7 3a f2 62 0100: 59 27 16 fa 42 1b e1 db 19 76 a8 40 06 25 d3 28 54 bf dd d4 75

1e 4f

40 d0 c4 3e 1e 60 e7 4b 9b 0120: c9 c8 98 db a4 74 8f 86 39 ae 76 9c f9 c9 fe 63 ef 34 ab 4d 0b

14 22

d0 d6 9e a3 fd 12 ab c3 7c 0140: 61 fd ea 09 dc 2d ad 78 6e ce 13 2b 95 36 83 34 3a 1b ef d3 fd

07 de

b2 df c7 7a 83 bd 6e ab 51 0160: 70 99 4e 28 07 de 63 42 ab 81 96 79 7f 30 27 28 4a 3e a1 8f 42

5f 7d

cd 8f ec 86 e0 ea 2b fb 05 0180: c2 ce ce 69 ae 4e 5c dd 95 85 11 23 a3 80 85 40 65 e3 a1 92 18

9a dc

31 ac 13 24 a3 a9 b9 5c 95 01a0: f5 b5 b5 08 ee 7d d8 ff 44 42 77 c4 09 25 35 7c b4 0b 64 77 ea

74 19

b7 b0 c1 04 6d 42 7e ab 32 01c0: 91 e5 b1 59 2d 60 31 11 5f 38 52 36 d0 ba c0 73 d5 fb 5c b6 82

a1

I vaguely recall the running hash need for a challenge auth being

rather hard

to get right but I had the advantage of being able to compare how both sides built it up.

Jonathan

Ah. Been a while, but IIRC correctly the spec doesn't make it clear when signatures should be ASN.1. My basis for choosing combinations in that code were what libSPDM did at the time. I

remember

a bunch of trial and error and also hand decoding binary to try to figure out what the encodings were. I also enjoyed those places where various different ASN.1 encoded structures were concatenated rather that encoded in one go - hence no cheap way to index to the next one.

I'm reviewing a nice short 972 page spec draft this week (which will

remain

unnamed :) but if I get time I'll see if I can test that path before Tuesday.

I think I ran basic tests on all the protocol types, but it was a

long

time ago so possible I missed one.

I meant to seek a spec clarification but haven't gotten around to it

yet.

Request from DMTF people was to file tickets against he spec for

stuff

like that.

Jonathan

Thanks, Lorenzo

New Potential topic.

Scheduler Tuneables from NUMA topology.

This is yangyicong's topic but I'll attempt to summarize:

https://lore.kernel.org/lkml/ef3b3e55-8be9-595f-6d54-886d13a7e2fd@hisil

icon.com/

The scheduler contains a bunch of tunables including this one which

is

"migration cost" This value is used to make decisions in load balancing + to control

the

frequency of load balancing to avoid doing it too often. The default value has been fixed for a

long time

and systems have changed a lot in that time.

Currently the value is tunable via debugfs, but in the above thread

the

proposal to somehow base the value on the system topology was made.

We haven't yet proceeded very far with this but if we can get

appropriate

people for the call it may be a good opportunity to do some brainstorming,

particularly

as we don't have ready access to that many machine topologies so testing

any

proposal will be very challenging. Also I fear this space is only going to get

more

complex as systems get larger over the next year or two.

Next week may be too soon for such a discussion though given the

short

notice!

+CC Vincent and Dietmar, but please drag anyone else in who is

relevant to

this discussion.

I might also mention this topic at the LDCG meeting this week to see

if we

can interest from others who might be able to help with data + testing.

Thanks,

Jonathan

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Today's Topics:

1. Re: LOD Call notes: 22 March 2022 - vCPU Hotplug Update (Jonathan Cameron)

----------------------------------------------------------------------

Message: 1 Date: Wed, 13 Apr 2022 19:17:32 +0100 From: Jonathan Cameron <Jonathan.Cameron@Huawei.com<mailto:Jonathan.Cameron@Huawei.com

...

...

Subject: [Linaro-open-discussions] Re: LOD Call notes: 22 March 2022

-

vCPU Hotplug Update To: Ilkka Koskinen <ilkka@os.amperecomputing.commailto:ilkka@os.amperecomputing.com

...

Cc:

linaro-open-discussions@op-lists.linaro.org<mailto:linaro-open-discussi ons

@op-lists.linaro.org> Message-ID: <20220413191732.00000e4e@Huawei.commailto:20220413191732.0000 0e4e@Huawei.com> Content-Type: text/plain; charset="US-ASCII"

On Thu, 31 Mar 2022 11:47:26 -0700 (PDT) Ilkka Koskinen <ilkka@os.amperecomputing.commailto:ilkka@os.amperecomputing.com> wrote:

Hi everyone,

On Tue, 22 Mar 2022, Jonathan Cameron via Linaro-open-discussions

wrote:

Hi All,

A quick set of notes on the discussion on vCPU hotplug.

Great to have Ed join the discussion. If we are going to have further calls on this topic we may want to move the time to be more friendly for the US.

Current status

• ACPI spec change via code first route approved.
• Kernel patches being reworked / rebased by ARM. Expected to be sent

out in 5.19 cycle.

• QEMU patches being updated by Huawei. Will do at least some light

testing and then push out a public git tree so that others can test - will

aim

to do this so it aligns with kernel code availability.

• Ed (Ampere) gave an update to say they are interested in pushing

this

forwards ASAP and have customer / OS vendor engagement which will be very useful in moving towards a complete solution, particularly

ensuring

good test coverage etc.

Noted that current QEMU patches may not cover all corner cases, for example live migration of VMs that have vCPUs hotplugged. Might 'just work' but we haven't tested it yet so probably not.

Given we didn't really add anything on DOE / SPDM over previous

calls,

I don't plan to send out anything on that topic this time.

Thanks to Joyce for hosting the call. If I noted down anything

wrong,

or incomplete let the list know.

Jonathan

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Thanks for the great meeting and the update! As Ed mentioned (and you wrote above), we're interested in joining the vCPU Hotplug

development.

Hi Ilkka

Great to have you on board for this.

Status wise, on QEMU side we have the new interface up and running (it was a whole 2 lines of code once we'd dealt with some rebasing

related

issues).

Rather more changes were needed to make it work sensibly on top of

Gavin

Shan's QEMU topology configuration patch set. https://lore.kernel.org/qemu-devel/20220403145953.10522-1-gshan@redh at.com/ The code going through some light internal review before we put it up somewhere public. Note it's definitely not production quality code but it is

somewhere

to start from. Given Easter related vacations I doubt we'll get

enough

eyes on it until next week.

We were thrown briefly by the fact there is a recently added apcica/actbl2.h entry for MADT_ONLINE_CAPABLE but it's a different

bit.

Seems x86 folk wanted something similar last year. We'll have to do something ugly in ACPICA to mangle the name for the new bit to avoid that

collision.

Lorenzo, I'm assuming the ACPCIA one line patch to add that define is something the ARM team will deal with?

There are some known limitations though that we'll need to sort out

before

upstreaming the QEMU support. One of which is SVE currently breaks

things.

Plenty of time though as kernel needs to be upstream first anyway.

Testing wise we are using QEMU on top of QEMU so we can poke corners

of

the architecture don't have hardware for (e.g. SVE :). Even on a rubbish

x86

desktop it's not that slow :)

Lorenzo, any update on kernel side of things or expected time scale

for

more information?

Obviously we have some hacked patches based on Salil's original

proposal

that sanity check the QEMU side of things but I suspect the final

version

will look rather different :)

One question on the spec change for Lorenzo. It's not entirely clear but I think we should not be using _MAT when 'hotplugging' the vCPUs? For now the QEMU code provides the relevant entries anyway but it would be nice to drop that if not necessary (it's not a huge amount of code or complexity though so not a big thing either way).

Thanks and an early happy Easter to those celebrating on Sunday.

Jonathan

Br, Ilkka

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