Re: [PATCH v1 0/6] Add TDX Guest Attestation support

[Aubrey Li]

On 2022/2/23 上午7:17, Kuppuswamy Sathyanarayanan wrote:
> Hi All,
> 
> Intel's Trust Domain Extensions (TDX) protect guest VMs from malicious
> hosts and some physical attacks. VM guest with TDX support is called
> as TD Guest.
> 
> In TD Guest, the attestation process is used to verify the 
> trustworthiness of TD guest to the 3rd party servers. Such attestation
> process is required by 3rd party servers before sending sensitive
> information to TD guests. One usage example is to get encryption keys
> from the key server for mounting the encrypted rootfs or secondary drive.
>     
> Following patches add the attestation support to TDX guest which
> includes attestation user interface driver, user agent example, and
> related hypercall support.
> 
> In this series, only following patches are in arch/x86 and are
> intended for x86 maintainers review.
> 
> * x86/tdx: Add TDREPORT TDX Module call support
> * x86/tdx: Add GetQuote TDX hypercall support
> * x86/tdx: Add SetupEventNotifyInterrupt TDX hypercall support
> * x86/tdx: Add TDX Guest event notify interrupt vector support
> 
> Patch titled "platform/x86: intel_tdx_attest: Add TDX Guest attestation
> interface driver" adds the attestation driver support. This is supposed
> to be reviewed by platform-x86 maintainers.
> 
> Also, patch titled "tools/tdx: Add a sample attestation user app" adds
> a testing app for attestation feature which needs review from
> bpf@xxxxxxxxxxxxxxx.
> 
> Dependencies:
> --------------
> 
> This feature has dependency on TDX guest core patch set series.
> 
> https://lore.kernel.org/all/20220218161718.67148-1-kirill.shutemov@xxxxxxxxxxxxxxx/T/

Does this feature also have dependency on QEMU tdx support?

> 
> History:
> ----------
> 
> Previously this patch set was sent under title "Add TDX Guest
> Support (Attestation support)". In the previous version, only the
> attestation driver patch was reviewed and got acked. Rest of the
> patches need to be reviewed freshly.
> 
> https://lore.kernel.org/bpf/20210806000946.2951441-1-sathyanarayanan.kuppuswamy@xxxxxxxxxxxxxxx/
> 
> Changes since previous submission:
>  * Updated commit log and error handling in TDREPORT, GetQuote and
>    SetupEventNotifyInterrupt support patches.
>  * Added locking support in attestation driver.
> 
> Kuppuswamy Sathyanarayanan (6):
>   x86/tdx: Add tdx_mcall_tdreport() API support
>   x86/tdx: Add tdx_hcall_get_quote() API support
>   x86/tdx: Add SetupEventNotifyInterrupt TDX hypercall support
>   platform/x86: intel_tdx_attest: Add TDX Guest attestation interface
>     driver
>   x86/tdx: Add TDX Guest event notify interrupt vector support
>   tools/tdx: Add a sample attestation user app
> 
>  arch/x86/coco/tdx.c                           | 170 ++++++++++++
>  arch/x86/include/asm/hardirq.h                |   4 +
>  arch/x86/include/asm/idtentry.h               |   4 +
>  arch/x86/include/asm/irq_vectors.h            |   7 +-
>  arch/x86/include/asm/tdx.h                    |   5 +
>  arch/x86/kernel/irq.c                         |   7 +
>  drivers/platform/x86/intel/Kconfig            |   1 +
>  drivers/platform/x86/intel/Makefile           |   1 +
>  drivers/platform/x86/intel/tdx/Kconfig        |  13 +
>  drivers/platform/x86/intel/tdx/Makefile       |   3 +
>  .../platform/x86/intel/tdx/intel_tdx_attest.c | 241 ++++++++++++++++++
>  include/uapi/misc/tdx.h                       |  37 +++
>  tools/Makefile                                |  13 +-
>  tools/tdx/Makefile                            |  19 ++
>  tools/tdx/attest/.gitignore                   |   2 +
>  tools/tdx/attest/Makefile                     |  24 ++
>  tools/tdx/attest/tdx-attest-test.c            | 240 +++++++++++++++++
>  17 files changed, 784 insertions(+), 7 deletions(-)
>  create mode 100644 drivers/platform/x86/intel/tdx/Kconfig
>  create mode 100644 drivers/platform/x86/intel/tdx/Makefile
>  create mode 100644 drivers/platform/x86/intel/tdx/intel_tdx_attest.c
>  create mode 100644 include/uapi/misc/tdx.h
>  create mode 100644 tools/tdx/Makefile
>  create mode 100644 tools/tdx/attest/.gitignore
>  create mode 100644 tools/tdx/attest/Makefile
>  create mode 100644 tools/tdx/attest/tdx-attest-test.c
>