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| author | Vasant Hegde <hegdevasant@linux.vnet.ibm.com> | 2019-07-12 16:47:58 +0530 |
|---|---|---|
| committer | Oliver O'Halloran <oohall@gmail.com> | 2019-08-15 17:54:15 +1000 |
| commit | 19a8694fb204d7532f0d9de33fa6334535733bed (patch) | |
| tree | 3911cc0afe0c503ab970cc809245f6c0e81b7264 /include | |
| parent | 3d85abd9d3e15885ef4c2be08d2e89d4d4247d6d (diff) | |
| download | skiboot-19a8694fb204d7532f0d9de33fa6334535733bed.zip skiboot-19a8694fb204d7532f0d9de33fa6334535733bed.tar.gz skiboot-19a8694fb204d7532f0d9de33fa6334535733bed.tar.bz2 | |
MPIPL: Add OPAL API to query saved tags
Pre-MPIPL kernel saves various information required to create vmcore in
metadata area and passes metadata area pointer to OPAL. OPAL will preserve
this pointer across MPIPL. Post MPIPL kernel will request for saved tags
via this API. Kernel also needs below tags:
- Saved CPU registers data to access CPU registers
- OPAL metadata area to create opalcore
Format:
opal_mpipl_query_tag(enum opal_mpipl_tags tag, uint64_t *tag_val)
tag :
OPAL_MPIPL_TAG_CPU
Pointer to CPU register data content metadata area
OPAL_MPIPL_TAG_OPAL
Pointer to OPAL metadata area
OPAL_MPIPL_TAG_KERNEL
During first boot, kernel will setup its metadata area and asks
OPAL to preserve metadata area pointer across MPIPL. Post MPIPL
kernel calls this API to get metadata pointer and it will use
that pointer to retrieve metadata and create dump.
OPAL_MPIPL_TAG_BOOT_MEM
During MPIPL registration kernel will specify how much memory
firmware can use for Post MPIPL load. Post MPIPL petitboot kernel
will query for this tag to get boot memory size.
Return values:
OPAL_SUCCESS : Operation success
OPAL_PARAMETER : Invalid parameter
Signed-off-by: Vasant Hegde <hegdevasant@linux.vnet.ibm.com>
[oliver: rebased]
Signed-off-by: Oliver O'Halloran <oohall@gmail.com>
Diffstat (limited to 'include')
| -rw-r--r-- | include/opal-api.h | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/include/opal-api.h b/include/opal-api.h index 7d8e046..ee66bbb 100644 --- a/include/opal-api.h +++ b/include/opal-api.h @@ -221,7 +221,8 @@ #define OPAL_NPU_MEM_RELEASE 172 #define OPAL_MPIPL_UPDATE 173 #define OPAL_MPIPL_REGISTER_TAG 174 -#define OPAL_LAST 174 +#define OPAL_MPIPL_QUERY_TAG 175 +#define OPAL_LAST 175 #define QUIESCE_HOLD 1 /* Spin all calls at entry */ #define QUIESCE_REJECT 2 /* Fail all calls with OPAL_BUSY */ |