From 6f5f193e84d3d7b55d406ecc7ac4ea1ef1d1876f Mon Sep 17 00:00:00 2001
From: Hari Bathini <hbathini@linux.ibm.com>
Date: Wed, 11 Sep 2019 20:20:12 +0530
Subject: [PATCH] powerpc/opal: add MPIPL interface definitions
References: jsc#PM-1318 jsc#SLE-9099 jsc#SLE-9176
Patch-mainline: v5.4-rc1
Git-commit: 6f5f193e84d3d7b55d406ecc7ac4ea1ef1d1876f
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
Acked-by: Michal Suchanek <msuchanek@suse.de>
---
arch/powerpc/include/asm/opal-api.h | 44 +++++++++++++++++++++-
arch/powerpc/include/asm/opal.h | 5 +++
arch/powerpc/platforms/powernv/opal-call.c | 3 ++
3 files changed, 51 insertions(+), 1 deletion(-)
diff --git a/arch/powerpc/include/asm/opal-api.h b/arch/powerpc/include/asm/opal-api.h
index 1cad413e1e0e..378e3997845a 100644
--- a/arch/powerpc/include/asm/opal-api.h
+++ b/arch/powerpc/include/asm/opal-api.h
@@ -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 */
diff --git a/arch/powerpc/include/asm/opal.h b/arch/powerpc/include/asm/opal.h
index d5a0807d21db..a0cf8fba4d12 100644
--- a/arch/powerpc/include/asm/opal.h
+++ b/arch/powerpc/include/asm/opal.h
@@ -39,6 +39,7 @@ int64_t opal_npu_spa_clear_cache(uint64_t phb_id, uint32_t bdfn,
uint64_t PE_handle);
int64_t opal_npu_tl_set(uint64_t phb_id, uint32_t bdfn, long cap,
uint64_t rate_phys, uint32_t size);
+
int64_t opal_console_write(int64_t term_number, __be64 *length,
const uint8_t *buffer);
int64_t opal_console_read(int64_t term_number, __be64 *length,
@@ -297,6 +298,10 @@ int opal_sensor_group_clear(u32 group_hndl, int token);
int opal_sensor_group_enable(u32 group_hndl, int token, bool enable);
int opal_nx_coproc_init(uint32_t chip_id, uint32_t ct);
+s64 opal_mpipl_update(enum opal_mpipl_ops op, u64 src, u64 dest, u64 size);
+s64 opal_mpipl_register_tag(enum opal_mpipl_tags tag, u64 addr);
+s64 opal_mpipl_query_tag(enum opal_mpipl_tags tag, u64 *addr);
+
s64 opal_signal_system_reset(s32 cpu);
s64 opal_quiesce(u64 shutdown_type, s32 cpu);
diff --git a/arch/powerpc/platforms/powernv/opal-call.c b/arch/powerpc/platforms/powernv/opal-call.c
index dccdc9df5213..a2aa5e433ac8 100644
--- a/arch/powerpc/platforms/powernv/opal-call.c
+++ b/arch/powerpc/platforms/powernv/opal-call.c
@@ -287,3 +287,6 @@ OPAL_CALL(opal_pci_set_pbcq_tunnel_bar, OPAL_PCI_SET_PBCQ_TUNNEL_BAR);
OPAL_CALL(opal_sensor_read_u64, OPAL_SENSOR_READ_U64);
OPAL_CALL(opal_sensor_group_enable, OPAL_SENSOR_GROUP_ENABLE);
OPAL_CALL(opal_nx_coproc_init, OPAL_NX_COPROC_INIT);
+OPAL_CALL(opal_mpipl_update, OPAL_MPIPL_UPDATE);
+OPAL_CALL(opal_mpipl_register_tag, OPAL_MPIPL_REGISTER_TAG);
+OPAL_CALL(opal_mpipl_query_tag, OPAL_MPIPL_QUERY_TAG);
--
2.23.0