Merge tag 'tsm-for-6.16' of git://git.kernel.org/pub/scm/linux/kernel/git/devsec/tsm

Pull trusted security manager (TSM) updates from Dan Williams:

- Add a general sysfs scheme for publishing "Mea

Merge tag 'tsm-for-6.16' of git://git.kernel.org/pub/scm/linux/kernel/git/devsec/tsm

Pull trusted security manager (TSM) updates from Dan Williams:

- Add a general sysfs scheme for publishing "Measurement" values
provided by the architecture's TEE Security Manager. Use it to
publish TDX "Runtime Measurement Registers" ("RTMRs") that either
maintain a hash of stored values (similar to a TPM PCR) or provide
statically provisioned data. These measurements are validated by a
relying party.

- Reorganize the drivers/virt/coco/ directory for "host" and "guest"
shared infrastructure.

- Fix a configfs-tsm-report unregister bug

- With CONFIG_TSM_MEASUREMENTS joining CONFIG_TSM_REPORTS and in
anticipation of more shared "TSM" infrastructure arriving, rename the
maintainer entry to "TRUSTED SECURITY MODULE (TSM) INFRASTRUCTURE".

* tag 'tsm-for-6.16' of git://git.kernel.org/pub/scm/linux/kernel/git/devsec/tsm:
tsm-mr: Fix init breakage after bin_attrs constification by scoping non-const pointers to init phase
sample/tsm-mr: Fix missing static for sample_report
virt: tdx-guest: Transition to scoped_cond_guard for mutex operations
virt: tdx-guest: Refactor and streamline TDREPORT generation
virt: tdx-guest: Expose TDX MRs as sysfs attributes
x86/tdx: tdx_mcall_get_report0: Return -EBUSY on TDCALL_OPERAND_BUSY error
x86/tdx: Add tdx_mcall_extend_rtmr() interface
tsm-mr: Add tsm-mr sample code
tsm-mr: Add TVM Measurement Register support
configfs-tsm-report: Fix NULL dereference of tsm_ops
coco/guest: Move shared guest CC infrastructure to drivers/virt/coco/guest/
configfs-tsm: Namespace TSM report symbols

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Merge branch 'for-6.16/tsm-mr' into tsm-next

Pick up a couple fixes for issues noticed in linux-next (constification
of bin_attrs and missing 'static').

sample/tsm-mr: Fix missing static for sample_report

0day robot reports 'sample_report' can be static, fix it up.

Reported-by: kernel test robot <lkp@intel.com>
Closes: https://lore.kernel.org/oe-kb

sample/tsm-mr: Fix missing static for sample_report

0day robot reports 'sample_report' can be static, fix it up.

Reported-by: kernel test robot <lkp@intel.com>
Closes: https://lore.kernel.org/oe-kbuild-all/202505090938.avfIhLsl-lkp@intel.com/
Signed-off-by: Cedric Xing <cedric.xing@intel.com>
Link: https://patch.msgid.link/20250509030350.22363-1-cedric.xing@intel.com
Signed-off-by: Dan Williams <dan.j.williams@intel.com>

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Merge branch 'for-6.16/tsm-mr' into tsm-next

Merge measurement-register infrastructure for v6.16. Resolve conflicts
with the establishment of drivers/virt/coco/guest/ for cross-vendor
common TSM fun

Merge branch 'for-6.16/tsm-mr' into tsm-next

Merge measurement-register infrastructure for v6.16. Resolve conflicts
with the establishment of drivers/virt/coco/guest/ for cross-vendor
common TSM functionality.

Address a mis-merge with a fixup from Lukas:

Link: http://lore.kernel.org/20250509134031.70559-1-lukas.bulwahn@redhat.com

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tsm-mr: Add tsm-mr sample code

This sample kernel module demonstrates how to make MRs accessible to user
mode through the tsm-mr library.

Once loaded, this module registers a `miscdevice` that host

tsm-mr: Add tsm-mr sample code

This sample kernel module demonstrates how to make MRs accessible to user
mode through the tsm-mr library.

Once loaded, this module registers a `miscdevice` that host a set of
emulated measurement registers as shown in the directory tree below.

/sys/class/misc/tsm_mr_sample
└── measurements
├── config_mr
├── report_digest:sha512
├── rtmr0:sha256
├── rtmr1:sha384
├── rtmr_crypto_agile:sha256
├── rtmr_crypto_agile:sha384
└── static_mr:sha384

Among the MRs in this example:

- `config_mr` demonstrates a hashless MR, like MRCONFIGID in Intel TDX or
HOSTDATA in AMD SEV.
- `static_mr` demonstrates a static MR. The suffix `:sha384` indicates its
value is a sha384 digest.
- `rtmr0` is an RTMR with `TSM_MR_F_WRITABLE` **cleared**, preventing
direct extensions; as a result, the attribute `rtmr0:sha256` is
read-only.
- `rtmr1` is an RTMR with `TSM_MR_F_WRITABLE` **set**, permitting direct
extensions; thus, the attribute `rtmr1:sha384` is writable.
- `rtmr_crypto_agile` demonstrates a "single" MR that supports multiple
hash algorithms. Each supported algorithm has a corresponding digest,
usually referred to as a "bank" in TCG terminology. In this specific
sample, the 2 banks are aliased to `rtmr0` and `rtmr1`, respectively.
- `report_digest` contains the digest of the internal report structure
living in this sample module's memory. It is to demonstrate the use of
the `TSM_MR_F_LIVE` flag. Its value changes each time an RTMR is
extended.

Signed-off-by: Cedric Xing <cedric.xing@intel.com>
Reviewed-by: Dan Williams <dan.j.williams@intel.com>
Acked-by: Dionna Amalie Glaze <dionnaglaze@google.com>
Link: https://patch.msgid.link/20250506-tdx-rtmr-v6-2-ac6ff5e9d58a@intel.com
Signed-off-by: Dan Williams <dan.j.williams@intel.com>

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