From: Julien Grall <julien.grall@arm.com>
To: Volodymyr Babchuk <Volodymyr_Babchuk@epam.com>,
"xen-devel@lists.xenproject.org" <xen-devel@lists.xenproject.org>
Cc: "tee-dev@lists.linaro.org" <tee-dev@lists.linaro.org>,
Stefano Stabellini <sstabellini@kernel.org>
Subject: Re: [PATCH v5 04/10] xen/arm: optee: add fast calls handling
Date: Mon, 3 Jun 2019 13:34:32 +0100 [thread overview]
Message-ID: <50261dec-9f1d-de25-78ba-a5eb6fef54ed@arm.com> (raw)
In-Reply-To: <20190521212530.12706-5-volodymyr_babchuk@epam.com>
Hi Volodymyr,
On 21/05/2019 22:25, Volodymyr Babchuk wrote:
> This patch adds handling for the fast SMCs. As name suggests, those
> calls can't be preempted and are used for auxiliary tasks such as
> information retrieval. Most handlers are quite trivial, with exception
> for capabilities information.
>
> Capabilities exchange should be filtered out, so only caps
> known to mediator are used. Also mediator disables static SHM
> memory capability, because it can't share OP-TEE memory with a domain.
> Only domain can share memory with OP-TEE, so it ensures that OP-TEE
> supports dynamic SHM.
>
> Basically, static SHM is a reserved memory region which is always
> mapped into OP-TEE address space. It belongs to OP-TEE. Normally,
> NW is allowed to access there, so it can communicate with OP-TEE.
>
> On other hand, dynamic SHM is NW's own memory, which it can share
> with OP-TEE. OP-TEE maps this memory dynamically, when it wants to
> access it.
>
> Because mediator can't share one static SHM region with all guests, it
> just disables it for all of them. It is possible to make exception for
> Dom0, but it requires separate handling for buffers allocated from
> that region. Thus, it is not implemented yet.
>
> Signed-off-by: Volodymyr Babchuk <volodymyr_babchuk@epam.com>
Acked-by: Julien Gral <julien.grall@arm.com>
Cheers,
--
Julien Grall
_______________________________________________
Xen-devel mailing list
Xen-devel@lists.xenproject.org
https://lists.xenproject.org/mailman/listinfo/xen-devel
WARNING: multiple messages have this Message-ID (diff)
From: Julien Grall <julien.grall@arm.com>
To: Volodymyr Babchuk <Volodymyr_Babchuk@epam.com>,
"xen-devel@lists.xenproject.org" <xen-devel@lists.xenproject.org>
Cc: "tee-dev@lists.linaro.org" <tee-dev@lists.linaro.org>,
Stefano Stabellini <sstabellini@kernel.org>
Subject: Re: [Xen-devel] [PATCH v5 04/10] xen/arm: optee: add fast calls handling
Date: Mon, 3 Jun 2019 13:34:32 +0100 [thread overview]
Message-ID: <50261dec-9f1d-de25-78ba-a5eb6fef54ed@arm.com> (raw)
Message-ID: <20190603123432.XkyapFrdMWS04FM0W_iXM1eWOXx5pMiuA-iOKfI-f7U@z> (raw)
In-Reply-To: <20190521212530.12706-5-volodymyr_babchuk@epam.com>
Hi Volodymyr,
On 21/05/2019 22:25, Volodymyr Babchuk wrote:
> This patch adds handling for the fast SMCs. As name suggests, those
> calls can't be preempted and are used for auxiliary tasks such as
> information retrieval. Most handlers are quite trivial, with exception
> for capabilities information.
>
> Capabilities exchange should be filtered out, so only caps
> known to mediator are used. Also mediator disables static SHM
> memory capability, because it can't share OP-TEE memory with a domain.
> Only domain can share memory with OP-TEE, so it ensures that OP-TEE
> supports dynamic SHM.
>
> Basically, static SHM is a reserved memory region which is always
> mapped into OP-TEE address space. It belongs to OP-TEE. Normally,
> NW is allowed to access there, so it can communicate with OP-TEE.
>
> On other hand, dynamic SHM is NW's own memory, which it can share
> with OP-TEE. OP-TEE maps this memory dynamically, when it wants to
> access it.
>
> Because mediator can't share one static SHM region with all guests, it
> just disables it for all of them. It is possible to make exception for
> Dom0, but it requires separate handling for buffers allocated from
> that region. Thus, it is not implemented yet.
>
> Signed-off-by: Volodymyr Babchuk <volodymyr_babchuk@epam.com>
Acked-by: Julien Gral <julien.grall@arm.com>
Cheers,
--
Julien Grall
_______________________________________________
Xen-devel mailing list
Xen-devel@lists.xenproject.org
https://lists.xenproject.org/mailman/listinfo/xen-devel
next prev parent reply other threads:[~2019-06-03 12:34 UTC|newest]
Thread overview: 68+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-05-21 21:25 [PATCH v5 00/10] TEE mediator (and OP-TEE) support in XEN Volodymyr Babchuk
2019-05-21 21:25 ` [Xen-devel] " Volodymyr Babchuk
2019-05-21 21:25 ` [PATCH v5 01/10] xen/arm: add generic TEE mediator framework Volodymyr Babchuk
2019-05-21 21:25 ` [Xen-devel] " Volodymyr Babchuk
2019-05-22 8:45 ` Jan Beulich
2019-05-22 8:45 ` [Xen-devel] " Jan Beulich
2019-05-22 9:27 ` Julien Grall
2019-05-22 9:27 ` [Xen-devel] " Julien Grall
2019-05-22 10:02 ` Jan Beulich
2019-05-22 10:02 ` [Xen-devel] " Jan Beulich
2019-05-22 12:04 ` Julien Grall
2019-05-22 12:04 ` [Xen-devel] " Julien Grall
2019-06-03 11:46 ` Julien Grall
2019-06-03 11:46 ` [Xen-devel] " Julien Grall
2019-06-03 11:48 ` Julien Grall
2019-06-03 11:48 ` [Xen-devel] " Julien Grall
2019-06-06 16:02 ` Julien Grall
2019-06-07 9:36 ` Julien Grall
2019-06-11 18:18 ` Volodymyr Babchuk
2019-06-11 18:26 ` Julien Grall
2019-05-21 21:25 ` [PATCH v5 02/10] xen/arm: optee: add OP-TEE header files Volodymyr Babchuk
2019-05-21 21:25 ` [Xen-devel] " Volodymyr Babchuk
2019-06-03 11:49 ` Julien Grall
2019-06-03 11:49 ` [Xen-devel] " Julien Grall
2019-06-10 18:20 ` Volodymyr Babchuk
2019-06-10 18:53 ` Julien Grall
2019-05-21 21:25 ` [PATCH v5 03/10] xen/arm: optee: add OP-TEE mediator skeleton Volodymyr Babchuk
2019-05-21 21:25 ` [Xen-devel] " Volodymyr Babchuk
2019-06-03 12:34 ` Julien Grall
2019-06-03 12:34 ` [Xen-devel] " Julien Grall
2019-05-21 21:25 ` [PATCH v5 04/10] xen/arm: optee: add fast calls handling Volodymyr Babchuk
2019-05-21 21:25 ` [Xen-devel] " Volodymyr Babchuk
2019-06-03 12:34 ` Julien Grall [this message]
2019-06-03 12:34 ` Julien Grall
2019-05-21 21:26 ` [PATCH v5 05/10] xen/arm: optee: add std call handling Volodymyr Babchuk
2019-05-21 21:26 ` [Xen-devel] " Volodymyr Babchuk
2019-06-03 12:34 ` Julien Grall
2019-06-03 12:34 ` [Xen-devel] " Julien Grall
2019-05-21 21:26 ` [PATCH v5 06/10] xen/arm: optee: add support for RPC SHM buffers Volodymyr Babchuk
2019-05-21 21:26 ` [Xen-devel] " Volodymyr Babchuk
2019-06-03 12:33 ` Julien Grall
2019-06-03 12:33 ` [Xen-devel] " Julien Grall
2019-05-21 21:26 ` [PATCH v5 07/10] xen/arm: optee: add support for arbitrary shared memory Volodymyr Babchuk
2019-05-21 21:26 ` [Xen-devel] " Volodymyr Babchuk
2019-06-03 12:29 ` Julien Grall
2019-06-03 12:29 ` [Xen-devel] " Julien Grall
2019-05-21 21:26 ` [PATCH v5 08/10] xen/arm: optee: add support for RPC commands Volodymyr Babchuk
2019-05-21 21:26 ` [Xen-devel] " Volodymyr Babchuk
2019-06-03 12:33 ` Julien Grall
2019-06-03 12:33 ` [Xen-devel] " Julien Grall
2019-05-21 21:26 ` [PATCH v5 09/10] tools/arm: tee: add "tee" option for xl.cfg Volodymyr Babchuk
2019-05-21 21:26 ` [Xen-devel] " Volodymyr Babchuk
2019-06-03 12:44 ` Julien Grall
2019-06-03 12:44 ` [Xen-devel] " Julien Grall
2019-06-03 14:47 ` Ian Jackson
2019-06-03 14:47 ` [Xen-devel] " Ian Jackson
2019-05-21 21:26 ` [PATCH v5 10/10] tools/arm: optee: create optee firmware node in DT if tee=optee Volodymyr Babchuk
2019-05-21 21:26 ` [Xen-devel] " Volodymyr Babchuk
2019-06-03 14:50 ` Ian Jackson
2019-06-03 14:50 ` [Xen-devel] " Ian Jackson
2019-06-01 14:50 ` [PATCH v5 00/10] TEE mediator (and OP-TEE) support in XEN Julien Grall
2019-06-01 14:50 ` [Xen-devel] " Julien Grall
2019-06-01 16:07 ` Volodymyr Babchuk
2019-06-01 16:07 ` [Xen-devel] " Volodymyr Babchuk
2019-06-01 16:55 ` Julien Grall
2019-06-01 16:55 ` [Xen-devel] " Julien Grall
2019-06-04 13:31 ` Volodymyr Babchuk
2019-06-06 15:33 ` Julien Grall
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=50261dec-9f1d-de25-78ba-a5eb6fef54ed@arm.com \
--to=julien.grall@arm.com \
--cc=Volodymyr_Babchuk@epam.com \
--cc=sstabellini@kernel.org \
--cc=tee-dev@lists.linaro.org \
--cc=xen-devel@lists.xenproject.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.