powerpc fixes for 4.12 #4

Fix running SPU programs on Cell, and a few other minor fixes.
 
 Thanks to:
   Alistair Popple, Jeremy Kerr, Michael Neuling, Nicholas Piggin.
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Merge tag 'powerpc-4.12-4' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux

Pull powerpc fixes from Michael Ellerman:
 "Fix running SPU programs on Cell, and a few other minor fixes.

  Thanks to Alistair Popple, Jeremy Kerr, Michael Neuling, Nicholas
  Piggin"

* tag 'powerpc-4.12-4' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux:
  powerpc: Add PPC_FEATURE userspace bits for SCV and DARN instructions
  powerpc/spufs: Fix hash faults for kernel regions
  powerpc: Fix booting P9 hash with CONFIG_PPC_RADIX_MMU=N
  powerpc/powernv/npu-dma.c: Fix opal_npu_destroy_context() call
  selftests/powerpc: Fix TM resched DSCR test with some compilers

arch/powerpc/include/uapi/asm/cputable.h

@@ -46,6 +46,8 @@
 #define PPC_FEATURE2_HTM_NOSC		0x01000000
 #define PPC_FEATURE2_ARCH_3_00		0x00800000 /* ISA 3.00 */
 #define PPC_FEATURE2_HAS_IEEE128	0x00400000 /* VSX IEEE Binary Float 128-bit */
+#define PPC_FEATURE2_DARN		0x00200000 /* darn random number insn */
+#define PPC_FEATURE2_SCV		0x00100000 /* scv syscall */
 
 /*
  * IMPORTANT!

arch/powerpc/kernel/cputable.c

@@ -124,7 +124,8 @@ extern void __restore_cpu_e6500(void);
 #define COMMON_USER_POWER9	COMMON_USER_POWER8
 #define COMMON_USER2_POWER9	(COMMON_USER2_POWER8 | \
 				 PPC_FEATURE2_ARCH_3_00 | \
-				 PPC_FEATURE2_HAS_IEEE128)
+				 PPC_FEATURE2_HAS_IEEE128 | \
+				 PPC_FEATURE2_DARN )
 
 #ifdef CONFIG_PPC_BOOK3E_64
 #define COMMON_USER_BOOKE	(COMMON_USER_PPC64 | PPC_FEATURE_BOOKE)

arch/powerpc/kernel/prom.c

@@ -161,7 +161,9 @@ static struct ibm_pa_feature {
 	{ .pabyte = 0,  .pabit = 3, .cpu_features  = CPU_FTR_CTRL },
 	{ .pabyte = 0,  .pabit = 6, .cpu_features  = CPU_FTR_NOEXECUTE },
 	{ .pabyte = 1,  .pabit = 2, .mmu_features  = MMU_FTR_CI_LARGE_PAGE },
+#ifdef CONFIG_PPC_RADIX_MMU
 	{ .pabyte = 40, .pabit = 0, .mmu_features  = MMU_FTR_TYPE_RADIX },
+#endif
 	{ .pabyte = 1,  .pabit = 1, .invert = 1, .cpu_features = CPU_FTR_NODSISRALIGN },
 	{ .pabyte = 5,  .pabit = 0, .cpu_features  = CPU_FTR_REAL_LE,
 				    .cpu_user_ftrs = PPC_FEATURE_TRUE_LE },

arch/powerpc/platforms/cell/spu_base.c

@@ -197,7 +197,9 @@ static int __spu_trap_data_map(struct spu *spu, unsigned long ea, u64 dsisr)
 	    (REGION_ID(ea) != USER_REGION_ID)) {
 
 		spin_unlock(&spu->register_lock);
-		ret = hash_page(ea, _PAGE_PRESENT | _PAGE_READ, 0x300, dsisr);
+		ret = hash_page(ea,
+				_PAGE_PRESENT | _PAGE_READ | _PAGE_PRIVILEGED,
+				0x300, dsisr);
 		spin_lock(&spu->register_lock);
 
 		if (!ret) {

arch/powerpc/platforms/powernv/npu-dma.c

@@ -714,7 +714,7 @@ static void pnv_npu2_release_context(struct kref *kref)
 void pnv_npu2_destroy_context(struct npu_context *npu_context,
 			struct pci_dev *gpdev)
 {
-	struct pnv_phb *nphb, *phb;
+	struct pnv_phb *nphb;
 	struct npu *npu;
 	struct pci_dev *npdev = pnv_pci_get_npu_dev(gpdev, 0);
 	struct device_node *nvlink_dn;
@@ -728,13 +728,12 @@ void pnv_npu2_destroy_context(struct npu_context *npu_context,
 
 	nphb = pci_bus_to_host(npdev->bus)->private_data;
 	npu = &nphb->npu;
-	phb = pci_bus_to_host(gpdev->bus)->private_data;
 	nvlink_dn = of_parse_phandle(npdev->dev.of_node, "ibm,nvlink", 0);
 	if (WARN_ON(of_property_read_u32(nvlink_dn, "ibm,npu-link-index",
 							&nvlink_index)))
 		return;
 	npu_context->npdev[npu->index][nvlink_index] = NULL;
-	opal_npu_destroy_context(phb->opal_id, npu_context->mm->context.id,
+	opal_npu_destroy_context(nphb->opal_id, npu_context->mm->context.id,
 				PCI_DEVID(gpdev->bus->number, gpdev->devfn));
 	kref_put(&npu_context->kref, pnv_npu2_release_context);
 }

tools/testing/selftests/powerpc/tm/tm-resched-dscr.c

@@ -42,12 +42,12 @@ int test_body(void)
 	printf("Check DSCR TM context switch: ");
 	fflush(stdout);
 	for (;;) {
-		rv = 1;
 		asm __volatile__ (
 			/* set a known value into the DSCR */
 			"ld      3, %[dscr1];"
 			"mtspr   %[sprn_dscr], 3;"
 
+			"li      %[rv], 1;"
 			/* start and suspend a transaction */
 			"tbegin.;"
 			"beq     1f;"