1 files changed, 82 insertions, 6 deletions

diff --git a/arch/ppc64/kernel/LparData.c b/arch/ppc64/kernel/LparData.c
index 6ffcf67dd507..76cfd1449d52 100644
--- a/arch/ppc64/kernel/LparData.c
+++ b/arch/ppc64/kernel/LparData.c
@@ -33,17 +33,36 @@
  * 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 */
@@ -51,6 +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);