sgi-xp: support runtime selection of xp_max_npartitions
Support runtime selection of the max number of partitions based on the
hardware being run on.
Signed-off-by: Dean Nelson <dcn@sgi.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
diff --git a/drivers/misc/sgi-xp/xpc.h b/drivers/misc/sgi-xp/xpc.h
index 11ac267..0f2affd 100644
--- a/drivers/misc/sgi-xp/xpc.h
+++ b/drivers/misc/sgi-xp/xpc.h
@@ -210,7 +210,7 @@
* the XPC running on the remote partition).
*/
#define XPC_NOTIFY_IRQ_AMOS 0
-#define XPC_ACTIVATE_IRQ_AMOS (XPC_NOTIFY_IRQ_AMOS + XP_MAX_PARTITIONS)
+#define XPC_ACTIVATE_IRQ_AMOS (XPC_NOTIFY_IRQ_AMOS + XP_MAX_NPARTITIONS_SN2)
#define XPC_ENGAGED_PARTITIONS_AMO (XPC_ACTIVATE_IRQ_AMOS + XP_NASID_MASK_WORDS)
#define XPC_DISENGAGE_REQUEST_AMO (XPC_ENGAGED_PARTITIONS_AMO + 1)
@@ -285,7 +285,7 @@
};
#define XPC_GP_SIZE \
- L1_CACHE_ALIGN(sizeof(struct xpc_gp) * XPC_NCHANNELS)
+ L1_CACHE_ALIGN(sizeof(struct xpc_gp) * XPC_MAX_NCHANNELS)
/*
* Define a structure that contains arguments associated with opening and
@@ -300,7 +300,8 @@
};
#define XPC_OPENCLOSE_ARGS_SIZE \
- L1_CACHE_ALIGN(sizeof(struct xpc_openclose_args) * XPC_NCHANNELS)
+ L1_CACHE_ALIGN(sizeof(struct xpc_openclose_args) * \
+ XPC_MAX_NCHANNELS)
/* struct xpc_msg flags */
@@ -637,7 +638,7 @@
extern struct xpc_vars *xpc_vars;
extern struct xpc_rsvd_page *xpc_rsvd_page;
extern struct xpc_vars_part *xpc_vars_part;
-extern struct xpc_partition xpc_partitions[XP_MAX_PARTITIONS + 1];
+extern struct xpc_partition *xpc_partitions;
extern char *xpc_remote_copy_buffer;
extern void *xpc_remote_copy_buffer_base;
extern void *xpc_kmalloc_cacheline_aligned(size_t, gfp_t, void **);
@@ -1104,13 +1105,14 @@
}
/*
+>>> this block comment needs to be moved and re-written.
* Memory for XPC's AMO variables is allocated by the MSPEC driver. These
* pages are located in the lowest granule. The lowest granule uses 4k pages
* for cached references and an alternate TLB handler to never provide a
* cacheable mapping for the entire region. This will prevent speculative
* reading of cached copies of our lines from being issued which will cause
* a PI FSB Protocol error to be generated by the SHUB. For XPC, we need 64
- * AMO variables (based on XP_MAX_PARTITIONS) for message notification and an
+ * AMO variables (based on xp_max_npartitions) for message notification and an
* additional 128 AMO variables (based on XP_NASID_MASK_WORDS) for partition
* activation and 2 AMO variables for partition deactivation.
*/