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| author | Vasant Hegde <hegdevasant@linux.vnet.ibm.com> | 2019-07-12 16:47:50 +0530 |
|---|---|---|
| committer | Oliver O'Halloran <oohall@gmail.com> | 2019-08-15 17:53:36 +1000 |
| commit | 8d0c8ae579e2b9802546f4bfd9c757d630645600 (patch) | |
| tree | 4dfeef61674b7bc1af069a8024d4e9a649f853e1 | |
| parent | ef6da5f6741c5d6d10407741382c5ed1ad71f791 (diff) | |
| download | skiboot-8d0c8ae579e2b9802546f4bfd9c757d630645600.zip skiboot-8d0c8ae579e2b9802546f4bfd9c757d630645600.tar.gz skiboot-8d0c8ae579e2b9802546f4bfd9c757d630645600.tar.bz2 | |
MPIPL: Add OPAL API to register tags
This patch adds new API to register tags.
opal_mpipl_register_tag(enum opal_mpipl_tags tag, uint64_t tag_val)
tag:
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 requests OPAL to provide 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 : Payload passed invalid tag
Signed-off-by: Vasant Hegde <hegdevasant@linux.vnet.ibm.com>
[oliver: rebased]
Signed-off-by: Oliver O'Halloran <oohall@gmail.com>
| -rw-r--r-- | core/opal-dump.c | 29 | ||||
| -rw-r--r-- | include/opal-api.h | 13 |
2 files changed, 41 insertions, 1 deletions
diff --git a/core/opal-dump.c b/core/opal-dump.c index 2db5775..775ec81 100644 --- a/core/opal-dump.c +++ b/core/opal-dump.c @@ -299,6 +299,34 @@ static int64_t opal_mpipl_update(enum opal_mpipl_ops ops, return rc; } +static int64_t opal_mpipl_register_tag(enum opal_mpipl_tags tag, + uint64_t tag_val) +{ + int rc = OPAL_SUCCESS; + + switch (tag) { + case OPAL_MPIPL_TAG_BOOT_MEM: + if (tag_val <= 0 || tag_val > top_of_ram) { + prlog(PR_DEBUG, "Payload sent invalid boot mem size" + " : 0x%llx\n", tag_val); + rc = OPAL_PARAMETER; + } else { + mpipl_metadata->boot_mem_size = tag_val; + prlog(PR_NOTICE, "Boot mem size : 0x%llx\n", tag_val); + } + break; + case OPAL_MPIPL_TAG_KERNEL: + mpipl_metadata->kernel_tag = tag_val; + prlog(PR_NOTICE, "Payload sent metadata tag : 0x%llx\n", tag_val); + break; + default: + prlog(PR_DEBUG, "Payload sent unsupported tag : 0x%x\n", tag); + rc = OPAL_PARAMETER; + break; + } + return rc; +} + void opal_mpipl_init(void) { void *mdst_base = (void *)MDST_TABLE_BASE; @@ -335,4 +363,5 @@ void opal_mpipl_init(void) /* OPAL API for MPIPL update */ opal_register(OPAL_MPIPL_UPDATE, opal_mpipl_update, 4); + opal_register(OPAL_MPIPL_REGISTER_TAG, opal_mpipl_register_tag, 2); } diff --git a/include/opal-api.h b/include/opal-api.h index e6b7c23..0134ee1 100644 --- a/include/opal-api.h +++ b/include/opal-api.h @@ -220,7 +220,8 @@ #define OPAL_NPU_MEM_ALLOC 171 #define OPAL_NPU_MEM_RELEASE 172 #define OPAL_MPIPL_UPDATE 173 -#define OPAL_LAST 173 +#define OPAL_MPIPL_REGISTER_TAG 174 +#define OPAL_LAST 174 #define QUIESCE_HOLD 1 /* Spin all calls at entry */ #define QUIESCE_REJECT 2 /* Fail all calls with OPAL_BUSY */ @@ -1211,6 +1212,16 @@ enum opal_mpipl_ops { OPAL_MPIPL_FREE_PRESERVED_MEMORY= 3, }; +/* Tag will point to various metadata area. Kernel will + * use tag to get metadata value. + */ +enum opal_mpipl_tags { + OPAL_MPIPL_TAG_CPU = 0, + OPAL_MPIPL_TAG_OPAL = 1, + OPAL_MPIPL_TAG_KERNEL = 2, + OPAL_MPIPL_TAG_BOOT_MEM = 3, +}; + #endif /* __ASSEMBLY__ */ #endif /* __OPAL_API_H */ |