Re: [PATCH v5 00/10] TEE mediator (and OP-TEE) support in XEN

[Julien Grall <julien.grall@arm.com>]

Hi Volodymyr,

I tried to apply the patches to staging but fail because the patches 
contains =20. Do you have a tree with the series applied?

Cheers,

On 5/21/19 10:25 PM, Volodymyr Babchuk wrote:
> Hello community,
> 
> This is the fifth version of OP-TEE mediator in XEN.
> 
> OP-TEE 3.5.0 was released when I worked on this version of the
> pathes. This is the first release where virtualization support is
> available. This release includes both original virtualization patches
> and new SMC that retrevies number of threads from OP-TEE.
> 
> Many thanks to both OP-TEE and Xen communities for reviewing and helping
> with my changes to the both projects.
> 
> Global changes from v4:
>   - Substantial rework of OP-TEE mediator. Now it tries to return meaningful
>     error codes back to the guest.
>   - OP-TEE mediator does not use struct cpu_user_regs as a storage for
>     parameters and return values when calling OP-TEE. This makes it
>     compatbile with requirement from SMCCC.
>   - tee=native option replaced with tee=optee
>   - Authorship and s-o-b tag reset to my EPAM mail address
> 
> Overall changes from v3:
> 
>   - Patch "arm: add tee_enabled flag to xen_arch_domainconfig" was
>     squashed into "xen/arm: add generic TEE mediator framework"
>   - I implemented more elaborate error repoting to a guest. Now guest
>     will get meaningful error codes instead of generic
>     ARM_SMCCC_ERR_UNKNOWN_FUNCTION.
> 
> Per-patch changes are described in corresponding emails.
> 
> Changes from v2:
> 
>   - Use domain flags insted of domctl interface to enable optee for guests
>   - Remove patch "libxc: add xc_dom_tee_enable(...) function" because
>     of previous change
>   - Mediator now stores own context in arch part of struct domain, so
>     I removed patch "optee: add domain contexts"
> 
> Per-patch changes are described in corresponding emails.
> 
> ====
> v2:
> 
> This is v2 of patch series for OP-TEE mediator support in XEN. Changes from v1:
> 
>   - Added domctl interface, so now xl decides what domain should work with TEE
>   - Removed XSM support due to change described above
>   - Patch with OP-TEE mediator was splited to 7 separate patches
>   - Removed patch with call_smccc() function. Now this series depend on
>     Julien Grall's series "xen/arm: SMCCC fixup and improvement" [3]
> 
> =====
> v1:
> 
> This is follow for patch series [1]. There was lots of discussions
> for that series and I tried to address all of them in this new patchset.
> 
> Currently, I had a working solution for OP-TEE virtualization and it is being
> upstreamed right now ([2]). So, I think it is a good time to introduce support
> in XEN as well.
> 
> This series include generic TEE mediator framework and full-scale OP-TEE mediator
> which is working with mentioned chages in OP-TEE. So, multiple domains can
> work simultaneously with OP-TEE.
> 
> I added XSM support, so now it is possible to control which domains can work
> with TEEs. Also I changed way how TEE discovery is done. Now  it is very
> generic and should support any platform.
> 
> [1] https://lists.xenproject.org/archives/html/xen-devel/2017-10/msg01451.html
> [2] https://github.com/OP-TEE/optee_os/pull/2370
> [3] https://lists.xenproject.org/archives/html/xen-devel/2018-08/msg02138.html
> 
> 
> Volodymyr Babchuk (10):
>    xen/arm: add generic TEE mediator framework
>    xen/arm: optee: add OP-TEE header files
>    xen/arm: optee: add OP-TEE mediator skeleton
>    xen/arm: optee: add fast calls handling
>    xen/arm: optee: add std call handling
>    xen/arm: optee: add support for RPC SHM buffers
>    xen/arm: optee: add support for arbitrary shared memory
>    xen/arm: optee: add support for RPC commands
>    tools/arm: tee: add "tee" option for xl.cfg
>    tools/arm: optee: create optee firmware node in DT if tee=optee
> 
>   MAINTAINERS                         |    6 +
>   docs/man/xl.cfg.5.pod.in            |   19 +
>   tools/libxl/libxl.h                 |    5 +
>   tools/libxl/libxl_arm.c             |   42 +
>   tools/libxl/libxl_types.idl         |    6 +
>   tools/xl/xl_parse.c                 |    9 +
>   xen/arch/arm/Kconfig                |    9 +
>   xen/arch/arm/Makefile               |    1 +
>   xen/arch/arm/domain.c               |   19 +
>   xen/arch/arm/setup.c                |    2 +
>   xen/arch/arm/tee/Kconfig            |    4 +
>   xen/arch/arm/tee/Makefile           |    2 +
>   xen/arch/arm/tee/optee.c            | 1536 +++++++++++++++++++++++++++
>   xen/arch/arm/tee/tee.c              |   93 ++
>   xen/arch/arm/vsmc.c                 |    5 +
>   xen/arch/arm/xen.lds.S              |    7 +
>   xen/include/asm-arm/domain.h        |    4 +
>   xen/include/asm-arm/tee/optee_msg.h |  444 ++++++++
>   xen/include/asm-arm/tee/optee_smc.h |  556 ++++++++++
>   xen/include/asm-arm/tee/tee.h       |  109 ++
>   xen/include/public/arch-arm.h       |    4 +
>   21 files changed, 2882 insertions(+)
>   create mode 100644 xen/arch/arm/tee/Kconfig
>   create mode 100644 xen/arch/arm/tee/Makefile
>   create mode 100644 xen/arch/arm/tee/optee.c
>   create mode 100644 xen/arch/arm/tee/tee.c
>   create mode 100644 xen/include/asm-arm/tee/optee_msg.h
>   create mode 100644 xen/include/asm-arm/tee/optee_smc.h
>   create mode 100644 xen/include/asm-arm/tee/tee.h
> 

-- 
Julien Grall

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