1 files changed, 84 insertions, 15 deletions

diff --git a/arch/ppc64/kernel/LparData.c b/arch/ppc64/kernel/LparData.c
index badc5a44361..76cfd1449d5 100644
--- a/arch/ppc64/kernel/LparData.c
+++ b/arch/ppc64/kernel/LparData.c
@@ -28,29 +28,41 @@
 #include <asm/iSeries/IoHriProcessorVpd.h>
 #include <asm/iSeries/ItSpCommArea.h>
 
-/* The LpQueue is used to pass event data from the hypervisor to
- * the partition.  This is where I/O interrupt events are communicated.
- */
-
-/* May be filled in by the hypervisor so cannot end up in the BSS */
-struct ItLpQueue xItLpQueue __attribute__((__section__(".data")));
-
 
 /* The HvReleaseData is the root of the information shared between 
  * the hypervisor and Linux.  
  */
 
+/*
+ * WARNING - magic here
+ *
+ * Ok, this is a horrid hack below, but marginally better than the
+ * alternatives.  What we really want is just to initialize
+ * hvReleaseData in C as in the #if 0 section here.  However, gcc
+ * refuses to believe that (u32)&x is a constant expression, so will
+ * not allow the xMsNucDataOffset field to be properly initialized.
+ * So, we declare hvReleaseData in inline asm instead.  We use inline
+ * asm, rather than a .S file, because the assembler won't generate
+ * the necessary relocation for the LparMap either, unless that symbol
+ * is declared in the same source file.  Finally, we put the asm in a
+ * dummy, attribute-used function, instead of at file scope, because
+ * file scope asms don't allow contraints.  We want to use the "i"
+ * constraints to put sizeof() and offsetof() expressions in there,
+ * because including asm/offsets.h in C code then stringifying causes
+ * all manner of warnings.
+ */
+#if 0
 struct HvReleaseData hvReleaseData = {
 	.xDesc = 0xc8a5d9c4,	/* "HvRD" ebcdic */
 	.xSize = sizeof(struct HvReleaseData),
 	.xVpdAreasPtrOffset = offsetof(struct naca_struct, xItVpdAreas),
 	.xSlicNacaAddr = &naca,		/* 64-bit Naca address */
-	.xMsNucDataOffset = 0x4800,	/* offset of LparMap within loadarea (see head.S) */
-	.xTagsMode = 1,			/* tags inactive       */
-	.xAddressSize = 0,		/* 64 bit              */
-	.xNoSharedProcs = 0,		/* shared processors   */
-	.xNoHMT = 0,			/* HMT allowed         */
-	.xRsvd2 = 6,			/* TEMP: This allows non-GA driver */
+	.xMsNucDataOffset = (u32)((unsigned long)&xLparMap - KERNELBASE),
+	.xFlags = HVREL_TAGSINACTIVE	/* tags inactive       */
+					/* 64 bit              */
+					/* shared processors   */
+					/* HMT allowed         */
+		  | 6,			/* TEMP: This allows non-GA driver */
 	.xVrmIndex = 4,			/* We are v5r2m0               */
 	.xMinSupportedPlicVrmIndex = 3,		/* v5r1m0 */
 	.xMinCompatablePlicVrmIndex = 3,	/* v5r1m0 */
@@ -58,6 +70,63 @@ struct HvReleaseData hvReleaseData = {
 		0xa7, 0x40, 0xf2, 0x4b,
 		0xf4, 0x4b, 0xf6, 0xf4 },
 };
+#endif
+
+
+extern struct HvReleaseData hvReleaseData;
+
+static void __attribute_used__ hvReleaseData_wrapper(void)
+{
+	/* This doesn't appear to need any alignment (even 4 byte) */
+	asm volatile (
+		"	lparMapPhys = xLparMap - %3\n"
+		"	.data\n"
+		"	.globl	hvReleaseData\n"
+		"hvReleaseData:\n"
+		"	.long	0xc8a5d9c4\n"	/* xDesc */
+						/* "HvRD" in ebcdic */
+		"	.short	%0\n"		/* xSize */
+		"	.short	%1\n"		/* xVpdAreasPtrOffset */
+		"	.llong	naca\n"		/* xSlicNacaAddr */
+		"	.long	lparMapPhys\n"	/* xMsNucDataOffset */
+		"	.long	0\n"		/* xRsvd1 */
+		"	.short	%2\n"		/* xFlags */
+		"	.short	4\n"	/* xVrmIndex  - v5r2m0 */
+		"	.short	3\n"	/* xMinSupportedPlicVrmIndex - v5r1m0 */
+		"	.short	3\n"	/* xMinCompatablePlicVrmIndex - v5r1m0 */
+		"	.long	0xd38995a4\n"	/* xVrmName */
+		"	.long	0xa740f24b\n"	/*   "Linux 2.4.64" ebcdic */
+		"	.long	0xf44bf6f4\n"
+		"	. = hvReleaseData + %0\n"
+		"	.previous\n"
+		: : "i"(sizeof(hvReleaseData)),
+		"i"(offsetof(struct naca_struct, xItVpdAreas)),
+		"i"(HVREL_TAGSINACTIVE /* tags inactive, 64 bit, */
+				       /* shared processors, HMT allowed */
+		    | 6), /* TEMP: This allows non-GA drivers */
+		"i"(KERNELBASE)
+		);
+}
+
+struct LparMap __attribute__((aligned (16))) xLparMap = {
+	.xNumberEsids = HvEsidsToMap,
+	.xNumberRanges = HvRangesToMap,
+	.xSegmentTableOffs = STAB0_PAGE,
+
+	.xEsids = {
+		{ .xKernelEsid = GET_ESID(KERNELBASE),
+		  .xKernelVsid = KERNEL_VSID(KERNELBASE), },
+		{ .xKernelEsid = GET_ESID(VMALLOCBASE),
+		  .xKernelVsid = KERNEL_VSID(VMALLOCBASE), },
+	},
+
+	.xRanges = {
+		{ .xPages = HvPagesToMap,
+		  .xOffset = 0,
+		  .xVPN = KERNEL_VSID(KERNELBASE) << (SID_SHIFT - PAGE_SHIFT),
+		},
+	},
+};
 
 extern void system_reset_iSeries(void);
 extern void machine_check_iSeries(void);
@@ -200,7 +269,7 @@ struct ItVpdAreas itVpdAreas = {
 		0,0,0,			/* 13 - 15 */
 		sizeof(struct IoHriProcessorVpd),/* 16 length of Proc Vpd */
 		0,0,0,0,0,0,		/* 17 - 22  */
-		sizeof(struct ItLpQueue),/*     23 length of Lp Queue */
+		sizeof(struct hvlpevent_queue),	/* 23 length of Lp Queue */
 		0,0			/* 24 - 25 */
 		},
 	.xSlicVpdAdrs = {			/* VPD addresses */
@@ -218,7 +287,7 @@ struct ItVpdAreas itVpdAreas = {
 		0,0,0,			/* 13 - 15 */
 		&xIoHriProcessorVpd,	/*      16 Proc Vpd */
 		0,0,0,0,0,0,		/* 17 - 22 */
-		&xItLpQueue,		/*      23 Lp Queue */
+		&hvlpevent_queue,	/*      23 Lp Queue */
 		0,0
 	}
 };