---

yaml
---
r: 5151
b: refs/heads/master
c: 488f849
h: refs/heads/master
i:
  5149: 4a48069
  5147: a4e259c
  5143: d648a68
  5135: 4c1c901
  5119: 836927c
v: v3

[refs]

@@ -1,2 +1,2 @@
 ---
-refs/heads/master: 533f08172e21521a74e15cdef8a13c929596d506
+refs/heads/master: 488f84994c55927eef587a0827dc957c908a0bad

trunk/arch/ppc64/kernel/LparData.c

@@ -33,24 +33,100 @@
  * 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 */
 	.xVrmName = { 0xd3, 0x89, 0x95, 0xa4,	/* "Linux 2.4.64" ebcdic */
 		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);

trunk/arch/ppc64/kernel/head.S

@@ -522,36 +522,9 @@ __end_interrupts:
 #ifdef CONFIG_PPC_ISERIES
 	.globl naca
 naca:
-	.llong itVpdAreas
-
-	/*
-	 * The iSeries LPAR map is at this fixed address
-	 * so that the HvReleaseData structure can address
-	 * it with a 32-bit offset.
-	 *
-	 * The VSID values below are dependent on the
-	 * VSID generation algorithm.  See include/asm/mmu_context.h.
-	 */
-
-	. = 0x4800
-
-	.llong	2		/* # ESIDs to be mapped by hypervisor	 */
-	.llong	1		/* # memory ranges to be mapped by hypervisor */
-	.llong	STAB0_PAGE	/* Page # of segment table within load area	*/
-	.llong	0		/* Reserved */
-	.llong	0		/* Reserved */
-	.llong	0		/* Reserved */
-	.llong	0		/* Reserved */
-	.llong	0		/* Reserved */
-	.llong	(KERNELBASE>>SID_SHIFT)
-	.llong	0x408f92c94	/* KERNELBASE VSID */
-	/* We have to list the bolted VMALLOC segment here, too, so that it
-	 * will be restored on shared processor switch */
-	.llong	(VMALLOCBASE>>SID_SHIFT)
-	.llong	0xf09b89af5	/* VMALLOCBASE VSID */
-	.llong	8192		/* # pages to map (32 MB) */
-	.llong	0		/* Offset from start of loadarea to start of map */
-	.llong	0x408f92c940000	/* VPN of first page to map */
+	.llong	itVpdAreas
+	.llong	0		/* xRamDisk */
+	.llong	0		/* xRamDiskSize */
 
 	. = 0x6100
 

trunk/include/asm-ppc64/iSeries/HvReleaseData.h

@@ -39,18 +39,19 @@
  * know that this PLIC does not support running an OS "that old".
  */
 
+#define	HVREL_TAGSINACTIVE	0x8000
+#define HVREL_32BIT		0x4000
+#define HVREL_NOSHAREDPROCS	0x2000
+#define HVREL_NOHMT		0x1000
+
 struct HvReleaseData {
 	u32	xDesc;		/* Descriptor "HvRD" ebcdic	x00-x03 */
 	u16	xSize;		/* Size of this control block	x04-x05 */
 	u16	xVpdAreasPtrOffset; /* Offset in NACA of ItVpdAreas x06-x07 */
 	struct  naca_struct	*xSlicNacaAddr; /* Virt addr of SLIC NACA x08-x0F */
 	u32	xMsNucDataOffset; /* Offset of Linux Mapping Data x10-x13 */
 	u32	xRsvd1;		/* Reserved			x14-x17 */
-	u16	xTagsMode:1;	/* 0 == tags active, 1 == tags inactive */
-	u16	xAddressSize:1;	/* 0 == 64-bit, 1 == 32-bit */
-	u16	xNoSharedProcs:1; /* 0 == shared procs, 1 == no shared */
-	u16	xNoHMT:1;	/* 0 == allow HMT, 1 == no HMT */
-	u16	xRsvd2:12;	/* Reserved			x18-x19 */
+	u16	xFlags;
 	u16	xVrmIndex;	/* VRM Index of OS image	x1A-x1B */
 	u16	xMinSupportedPlicVrmIndex; /* Min PLIC level  (soft) x1C-x1D */
 	u16	xMinCompatablePlicVrmIndex; /* Min PLIC levelP (hard) x1E-x1F */

trunk/include/asm-ppc64/iSeries/LparMap.h

@@ -49,19 +49,26 @@
  * entry to map the Esid to the Vsid.
 */
 
+#define HvEsidsToMap	2
+#define HvRangesToMap	1
+
 /* Hypervisor initially maps 32MB of the load area */
 #define HvPagesToMap	8192
 
 struct LparMap {
-	u64	xNumberEsids;	// Number of ESID/VSID pairs (1)
-	u64	xNumberRanges;	// Number of VA ranges to map (1)
-	u64	xSegmentTableOffs; // Page number within load area of seg table (0)
+	u64	xNumberEsids;	// Number of ESID/VSID pairs
+	u64	xNumberRanges;	// Number of VA ranges to map
+	u64	xSegmentTableOffs; // Page number within load area of seg table
 	u64	xRsvd[5];
-	u64	xKernelEsid;	// Esid used to map kernel load (0x0C00000000)
-	u64	xKernelVsid;	// Vsid used to map kernel load (0x0C00000000)
-	u64	xPages;		// Number of pages to be mapped	(8192)
-	u64	xOffset;	// Offset from start of load area (0)
-	u64	xVPN;		// Virtual Page Number (0x000C000000000000)
+	struct {
+		u64	xKernelEsid;	// Esid used to map kernel load
+		u64	xKernelVsid;	// Vsid used to map kernel load
+	} xEsids[HvEsidsToMap];
+	struct {
+		u64	xPages;		// Number of pages to be mapped
+		u64	xOffset;	// Offset from start of load area
+		u64	xVPN;		// Virtual Page Number
+	} xRanges[HvRangesToMap];
 };
 
 extern struct LparMap		xLparMap;

trunk/include/asm-ppc64/mmu.h

@@ -338,6 +338,9 @@ static inline unsigned long get_vsid(unsigned long context, unsigned long ea)
 			     | (ea >> SID_SHIFT));
 }
 
+#define VSID_SCRAMBLE(pvsid)	(((pvsid) * VSID_MULTIPLIER) % VSID_MODULUS)
+#define KERNEL_VSID(ea)		VSID_SCRAMBLE(GET_ESID(ea))
+
 #endif /* __ASSEMBLY */
 
 #endif /* _PPC64_MMU_H_ */