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powerpc/opal: add MPIPL interface definitions

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MPIPL is Memory Preserving IPL supported from POWER9. This enables the
kernel to reset the system with memory 'preserved'. Also, it supports
copying memory from a source address to some destination address during
MPIPL boot. Add MPIPL interface definitions here to leverage these f/w
features in adding FADump support for PowerNV platform.

Signed-off-by: Hari Bathini <hbathini@linux.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/156821340710.5656.10071829040515662624.stgit@hbathini.in.ibm.com
This commit is contained in:
Hari Bathini 2019-09-11 20:20:12 +05:30 • committed by Michael Ellerman
parent 1679b96e69
commit 6f5f193e84
3 changed files with 51 additions and 1 deletions
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44
arch/powerpc/include/asm/opal-api.h
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@ -208,7 +208,10 @@
#define OPAL_HANDLE_HMI2 166
#define OPAL_NX_COPROC_INIT 167
#define OPAL_XIVE_GET_VP_STATE 170
#define OPAL_LAST 170
#define OPAL_MPIPL_UPDATE 173
#define OPAL_MPIPL_REGISTER_TAG 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 */
@ -1060,6 +1063,7 @@ enum {
OPAL_REBOOT_NORMAL = 0,
OPAL_REBOOT_PLATFORM_ERROR = 1,
OPAL_REBOOT_FULL_IPL = 2,
OPAL_REBOOT_MPIPL = 3,
};
/* Argument to OPAL_PCI_TCE_KILL */
@ -1136,6 +1140,44 @@ enum {
#define OPAL_PCI_P2P_LOAD 0x2
#define OPAL_PCI_P2P_STORE 0x4
/* MPIPL update operations */
enum opal_mpipl_ops {
OPAL_MPIPL_ADD_RANGE = 0,
OPAL_MPIPL_REMOVE_RANGE = 1,
OPAL_MPIPL_REMOVE_ALL = 2,
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,
};
/* Preserved memory details */
struct opal_mpipl_region {
__be64 src;
__be64 dest;
__be64 size;
};
/* Structure version */
#define OPAL_MPIPL_VERSION 0x01
struct opal_mpipl_fadump {
u8 version;
u8 reserved[7];
__be32 crashing_pir; /* OPAL crashing CPU PIR */
__be32 cpu_data_version;
__be32 cpu_data_size;
__be32 region_cnt;
struct opal_mpipl_region region[];
} __packed;
#endif /* __ASSEMBLY__ */
#endif /* __OPAL_API_H */