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| author |  Nayna Jain <nayna@linux.ibm.com>
| 2023-02-10 19:03:52 +1100 |
|---|---|---|
| committer |  Michael Ellerman <mpe@ellerman.id.au>
| 2023-02-12 22:12:38 +1100 |
| commit | 899d9b8fee66da820eadc60b2a70090eb83db761 (patch) | |
| tree | f3ef8f030c7b4b3d254c0f703360a91f55b1fa63 /arch/powerpc/include | |
| parent | powerpc/pseries: Expose PLPKS config values, support additional fields (diff) | |
| download | linux-899d9b8fee66da820eadc60b2a70090eb83db761.tar.gz linux-899d9b8fee66da820eadc60b2a70090eb83db761.tar.bz2 linux-899d9b8fee66da820eadc60b2a70090eb83db761.zip | |
powerpc/pseries: Implement signed update for PLPKS objects
The Platform Keystore provides a signed update interface which can be used
to create, replace or append to certain variables in the PKS in a secure
fashion, with the hypervisor requiring that the update be signed using the
Platform Key.
Implement an interface to the H_PKS_SIGNED_UPDATE hcall in the plpks
driver to allow signed updates to PKS objects.
(The plpks driver doesn't need to do any cryptography or otherwise handle
the actual signed variable contents - that will be handled by userspace
tooling.)
Signed-off-by: Nayna Jain <nayna@linux.ibm.com>
[ajd: split patch, add timeout handling and misc cleanups]
Co-developed-by: Andrew Donnellan <ajd@linux.ibm.com>
Signed-off-by: Andrew Donnellan <ajd@linux.ibm.com>
Signed-off-by: Russell Currey <ruscur@russell.cc>
Reviewed-by: Stefan Berger <stefanb@linux.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20230210080401.345462-18-ajd@linux.ibm.com
Diffstat (limited to 'arch/powerpc/include')
| -rw-r--r-- | arch/powerpc/include/asm/hvcall.h | 1 | ||||
| -rw-r--r-- | arch/powerpc/include/asm/plpks.h | 5 |
2 files changed, 6 insertions, 0 deletions
diff --git a/arch/powerpc/include/asm/hvcall.h b/arch/powerpc/include/asm/hvcall.h index 95fd7f9485d5..c099780385dd 100644 --- a/arch/powerpc/include/asm/hvcall.h +++ b/arch/powerpc/include/asm/hvcall.h @@ -335,6 +335,7 @@ #define H_RPT_INVALIDATE 0x448 #define H_SCM_FLUSH 0x44C #define H_GET_ENERGY_SCALE_INFO 0x450 +#define H_PKS_SIGNED_UPDATE 0x454 #define H_WATCHDOG 0x45C #define MAX_HCALL_OPCODE H_WATCHDOG diff --git a/arch/powerpc/include/asm/plpks.h b/arch/powerpc/include/asm/plpks.h index 7c5f51a9af7c..e7204e6c0ca4 100644 --- a/arch/powerpc/include/asm/plpks.h +++ b/arch/powerpc/include/asm/plpks.h @@ -69,6 +69,11 @@ struct plpks_var_name_list { }; /** + * Updates the authenticated variable. It expects NULL as the component. + */ +int plpks_signed_update_var(struct plpks_var *var, u64 flags); + +/** * Writes the specified var and its data to PKS. * Any caller of PKS driver should present a valid component type for * their variable. |