[PATCH] ppc64: add/forward port of lparcfg, from Will Schmidt

From: Anton Blanchard <anton@samba.org>

add/forward port of lparcfg, from Will Schmidt

arch/ppc64/Kconfig

@@ -142,6 +142,13 @@ config RTAS_FLASH
 config SCANLOG
 	tristate "Scanlog dump interface"
 	depends on PPC_RTAS
+
+config LPARCFG
+	bool "LPAR Configuration Data"
+	help
+	Provide system capacity information via human readable 
+	<key word>=<value> pairs through a /proc/ppc64/lparcfg interface.
+
 endmenu
 
 

arch/ppc64/kernel/Makefile

@@ -38,5 +38,7 @@ obj-$(CONFIG_MODULES)		+= module.o ppc_ksyms.o
 obj-$(CONFIG_PPC_RTAS)		+= rtas-proc.o
 obj-$(CONFIG_SCANLOG)		+= scanlog.o
 obj-$(CONFIG_VIOPATH)		+= viopath.o
+obj-$(CONFIG_LPARCFG)		+= lparcfg.o
+
 
 CFLAGS_ioctl32.o += -Ifs/

arch/ppc64/kernel/pSeries_hvCall.S

@@ -103,3 +103,41 @@ _GLOBAL(plpar_hcall_8arg_2ret)
 	ld	r0,-8(r1)
 	mtcrf	0xff,r0
 	blr                     /* return r3 = status */
+
+
+/* long plpar_hcall_4out(unsigned long opcode,	 R3 
+		 unsigned long arg1,		 R4 
+		 unsigned long arg2,		 R5 
+		 unsigned long arg3,		 R6 
+		 unsigned long arg4,		 R7 
+		 unsigned long *out1,	(r4)	 R8 
+		 unsigned long *out2,	(r5)	 R9
+		 unsigned long *out3,   (r6)     R10
+		 unsigned long *out4);	(r7)	 112(R1). From Parameter save area. 
+ */
+_GLOBAL(plpar_hcall_4out)
+	mfcr	r0
+	std	r0,-8(r1)
+	ld      r14,112(r1)
+	stdu	r1,-48(r1) 
+
+	std     r8,32(r1)       /* Save out ptrs. */
+	std     r9,24(r1)
+	std     r10,16(r1)
+	std     r14,8(r1)
+	
+	HSC                    /* invoke the hypervisor */
+
+	ld      r14,32(r1)      /* Fetch r4-r7 ret args. */
+	std     r4,0(r14)
+	ld      r14,24(r1)
+	std     r5,0(r14)
+	ld      r14,16(r1)
+	std     r6,0(r14)
+	ld      r14,8(r1)
+	std     r7,0(r14)
+
+	ld	r1,0(r1) 
+	ld	r0,-8(r1)
+	mtcrf	0xff,r0
+	blr                     /* return r3 = status */

include/asm-ppc64/hvcall.h

@@ -121,3 +121,20 @@ long plpar_hcall_8arg_2ret(unsigned long opcode,
 			   unsigned long *out1);
 
 
+ 
+ 
+/* plpar_hcall_4out()
+ *
+ * same as plpar_hcall except with 4 output arguments.  
+ * 
+ */
+long plpar_hcall_4out(unsigned long opcode,
+		      unsigned long arg1,
+		      unsigned long arg2,
+		      unsigned long arg3,
+		      unsigned long arg4,
+		      unsigned long *out1,
+		      unsigned long *out2,
+		      unsigned long *out3,
+		      unsigned long *out4);
+