[PATCH] ppc64: Move initialisation of xItLpQueue into ItLpQueue.c

The xItLpQueue is initalised manually in iSeries_setup_arch().  Move
this code into ItLpQueue.c for a cleaner separation.

Signed-off-by: Michael Ellerman <michael@ellerman.id.au>
Acked-by: Stephen Rothwell <sfr@canb.auug.org.au>
Signed-off-by: Paul Mackerras <paulus@samba.org>

1 files changed, 22 insertions, 0 deletions

diff --git a/arch/ppc64/kernel/ItLpQueue.c b/arch/ppc64/kernel/ItLpQueue.c
index 35f6deac0b99..091aaed4842c 100644
--- a/arch/ppc64/kernel/ItLpQueue.c
+++ b/arch/ppc64/kernel/ItLpQueue.c
@@ -11,6 +11,7 @@
 #include <linux/stddef.h>
 #include <linux/kernel.h>
 #include <linux/sched.h>
+#include <linux/bootmem.h>
 #include <asm/system.h>
 #include <asm/paca.h>
 #include <asm/iSeries/ItLpQueue.h>
@@ -186,3 +187,24 @@ static int set_spread_lpevents(char *str)
 }
 __setup("spread_lpevents=", set_spread_lpevents);
 
+void setup_hvlpevent_queue(void)
+{
+        void *eventStack;
+
+        /*
+         * Allocate a page for the Event Stack. The Hypervisor needs the
+         * absolute real address, so we subtract out the KERNELBASE and add
+         * in the absolute real address of the kernel load area.
+         */
+        eventStack = alloc_bootmem_pages(LpEventStackSize);
+        memset(eventStack, 0, LpEventStackSize);
+
+        /* Invoke the hypervisor to initialize the event stack */
+        HvCallEvent_setLpEventStack(0, eventStack, LpEventStackSize);
+
+        xItLpQueue.xSlicEventStackPtr = (char *)eventStack;
+        xItLpQueue.xSlicCurEventPtr = (char *)eventStack;
+        xItLpQueue.xSlicLastValidEventPtr = (char *)eventStack +
+                                        (LpEventStackSize - LpEventMaxSize);
+        xItLpQueue.xIndex = 0;
+}