Merge tag 'v3.10' into sdk-kernel-3.10

git rebase --continue

Linux 3.10

Conflicts:
	Documentation/virtual/kvm/api.txt
	arch/ia64/kvm/Makefile
	arch/powerpc/Kconfig
	arch/powerpc/Makefile
	arch/powerpc/boot/dts/b4420qds.dts
	arch/powerpc/boot/dts/b4860qds.dts
	arch/powerpc/boot/dts/b4qds.dts
	arch/powerpc/boot/dts/fsl/b4420si-post.dtsi
	arch/powerpc/boot/dts/fsl/b4420si-pre.dtsi
	arch/powerpc/boot/dts/fsl/b4860si-post.dtsi
	arch/powerpc/boot/dts/fsl/b4860si-pre.dtsi
	arch/powerpc/boot/dts/fsl/b4si-post.dtsi
	arch/powerpc/boot/dts/fsl/p1010si-post.dtsi
	arch/powerpc/boot/dts/fsl/p2041si-post.dtsi
	arch/powerpc/boot/dts/fsl/p3041si-post.dtsi
	arch/powerpc/boot/dts/fsl/p4080si-post.dtsi
	arch/powerpc/boot/dts/fsl/p5020si-post.dtsi
	arch/powerpc/boot/dts/fsl/p5040si-post.dtsi
	arch/powerpc/boot/dts/fsl/qonverge-usb2-dr-0.dtsi
	arch/powerpc/boot/dts/fsl/qoriq-sec5.0-0.dtsi
	arch/powerpc/boot/dts/fsl/t4240si-post.dtsi
	arch/powerpc/boot/dts/fsl/t4240si-pre.dtsi
	arch/powerpc/boot/dts/p1025rdb_36b.dts
	arch/powerpc/boot/dts/t4240qds.dts
	arch/powerpc/configs/corenet64_smp_defconfig
	arch/powerpc/configs/mpc85xx_defconfig
	arch/powerpc/configs/mpc85xx_smp_defconfig
	arch/powerpc/include/asm/cputable.h
	arch/powerpc/include/asm/kvm_host.h
	arch/powerpc/include/asm/kvm_ppc.h
	arch/powerpc/include/asm/machdep.h
	arch/powerpc/include/uapi/asm/kvm.h
	arch/powerpc/kernel/cpu_setup_fsl_booke.S
	arch/powerpc/kernel/cputable.c
	arch/powerpc/kernel/idle.c
	arch/powerpc/kernel/pci-common.c
	arch/powerpc/kvm/Kconfig
	arch/powerpc/kvm/book3s.c
	arch/powerpc/kvm/booke.c
	arch/powerpc/kvm/e500.c
	arch/powerpc/kvm/e500_mmu.c
	arch/powerpc/kvm/e500_mmu_host.c
	arch/powerpc/kvm/e500mc.c
	arch/powerpc/kvm/emulate.c
	arch/powerpc/kvm/irq.h
	arch/powerpc/kvm/mpic.c
	arch/powerpc/kvm/powerpc.c
	arch/powerpc/mm/tlb_nohash.c
	arch/powerpc/platforms/85xx/Kconfig
	arch/powerpc/platforms/85xx/b4_qds.c
	arch/powerpc/platforms/85xx/t4240_qds.c
	arch/powerpc/platforms/pseries/smp.c
	arch/powerpc/sysdev/fsl_85xx_l2ctlr.c
	arch/powerpc/sysdev/fsl_msi.c
	arch/powerpc/sysdev/fsl_pci.c
	arch/powerpc/sysdev/fsl_pci.h
	arch/powerpc/sysdev/mpic.c
	arch/x86/kvm/Makefile
	arch/x86/kvm/x86.c
	drivers/Kconfig
	drivers/clk/Kconfig
	drivers/cpufreq/Makefile
	drivers/crypto/caam/caamalg.c
	drivers/crypto/caam/intern.h
	drivers/crypto/caam/jr.c
	drivers/crypto/caam/regs.h
	drivers/infiniband/ulp/ipoib/ipoib_ethtool.c
	drivers/iommu/Makefile
	drivers/iommu/amd_iommu.c
	drivers/iommu/exynos-iommu.c
	drivers/iommu/intel-iommu.c
	drivers/iommu/iommu.c
	drivers/iommu/msm_iommu.c
	drivers/iommu/omap-iommu.c
	drivers/iommu/tegra-gart.c
	drivers/iommu/tegra-smmu.c
	drivers/misc/Makefile
	drivers/mmc/card/block.c
	drivers/mmc/card/queue.c
	drivers/mmc/core/core.c
	drivers/mtd/nand/fsl_ifc_nand.c
	drivers/net/ethernet/3com/3c501.c
	drivers/net/ethernet/8390/3c503.c
	drivers/net/ethernet/dec/ewrk3.c
	drivers/net/ethernet/freescale/fec.c
	drivers/net/ethernet/freescale/gianfar.c
	drivers/net/ethernet/freescale/gianfar.h
	drivers/net/ethernet/i825xx/3c505.c
	drivers/net/ethernet/i825xx/3c507.c
	drivers/rtc/rtc-ds3232.c
	drivers/s390/net/qeth_core_main.c
	drivers/staging/Kconfig
	drivers/staging/Makefile
	drivers/staging/ccg/u_ether.c
	drivers/usb/gadget/fsl_udc_core.c
	drivers/usb/otg/fsl_otg.c
	drivers/vfio/vfio.c
	drivers/watchdog/Kconfig
	include/linux/iommu.h
	include/linux/kvm_host.h
	include/linux/mmc/sdhci.h
	include/linux/msi.h
	include/linux/netdev_features.h
	include/linux/pci.h
	include/linux/skbuff.h
	include/net/ip6_route.h
	include/net/sch_generic.h
	include/net/xfrm.h
	include/uapi/linux/kvm.h
	net/core/netpoll.c
	virt/kvm/irqchip.c
	virt/kvm/kvm_main.c

1 files changed, 158 insertions, 40 deletions

diff --git a/arch/powerpc/mm/hugetlbpage.c b/arch/powerpc/mm/hugetlbpage.c
index 1a6de0a..77fdd2c 100644
--- a/arch/powerpc/mm/hugetlbpage.c
+++ b/arch/powerpc/mm/hugetlbpage.c
@@ -48,30 +48,71 @@ static u64 gpage_freearray[MAX_NUMBER_GPAGES];
 static unsigned nr_gpages;
 #endif
 
-static inline int shift_to_mmu_psize(unsigned int shift)
+#define hugepd_none(hpd)	((hpd).pd == 0)
+
+#ifdef CONFIG_PPC_BOOK3S_64
+/*
+ * At this point we do the placement change only for BOOK3S 64. This would
+ * possibly work on other subarchs.
+ */
+
+/*
+ * We have PGD_INDEX_SIZ = 12 and PTE_INDEX_SIZE = 8, so that we can have
+ * 16GB hugepage pte in PGD and 16MB hugepage pte at PMD;
+ */
+int pmd_huge(pmd_t pmd)
 {
-	int psize;
+	/*
+	 * leaf pte for huge page, bottom two bits != 00
+	 */
+	return ((pmd_val(pmd) & 0x3) != 0x0);
+}
 
-	for (psize = 0; psize < MMU_PAGE_COUNT; ++psize)
-		if (mmu_psize_defs[psize].shift == shift)
-			return psize;
-	return -1;
+int pud_huge(pud_t pud)
+{
+	/*
+	 * leaf pte for huge page, bottom two bits != 00
+	 */
+	return ((pud_val(pud) & 0x3) != 0x0);
 }
 
-static inline unsigned int mmu_psize_to_shift(unsigned int mmu_psize)
+int pgd_huge(pgd_t pgd)
 {
-	if (mmu_psize_defs[mmu_psize].shift)
-		return mmu_psize_defs[mmu_psize].shift;
-	BUG();
+	/*
+	 * leaf pte for huge page, bottom two bits != 00
+	 */
+	return ((pgd_val(pgd) & 0x3) != 0x0);
+}
+#else
+int pmd_huge(pmd_t pmd)
+{
+	return 0;
 }
 
-#define hugepd_none(hpd)	((hpd).pd == 0)
+int pud_huge(pud_t pud)
+{
+	return 0;
+}
 
+int pgd_huge(pgd_t pgd)
+{
+	return 0;
+}
+#endif
+
+/*
+ * We have 4 cases for pgds and pmds:
+ * (1) invalid (all zeroes)
+ * (2) pointer to next table, as normal; bottom 6 bits == 0
+ * (3) leaf pte for huge page, bottom two bits != 00
+ * (4) hugepd pointer, bottom two bits == 00, next 4 bits indicate size of table
+ */
 pte_t *find_linux_pte_or_hugepte(pgd_t *pgdir, unsigned long ea, unsigned *shift)
 {
 	pgd_t *pg;
 	pud_t *pu;
 	pmd_t *pm;
+	pte_t *ret_pte;
 	hugepd_t *hpdp = NULL;
 	unsigned pdshift = PGDIR_SHIFT;
 
@@ -79,30 +120,43 @@ pte_t *find_linux_pte_or_hugepte(pgd_t *pgdir, unsigned long ea, unsigned *shift
 		*shift = 0;
 
 	pg = pgdir + pgd_index(ea);
-	if (is_hugepd(pg)) {
+
+	if (pgd_huge(*pg)) {
+		ret_pte = (pte_t *) pg;
+		goto out;
+	} else if (is_hugepd(pg))
 		hpdp = (hugepd_t *)pg;
-	} else if (!pgd_none(*pg)) {
+	else if (!pgd_none(*pg)) {
 		pdshift = PUD_SHIFT;
 		pu = pud_offset(pg, ea);
-		if (is_hugepd(pu))
+
+		if (pud_huge(*pu)) {
+			ret_pte = (pte_t *) pu;
+			goto out;
+		} else if (is_hugepd(pu))
 			hpdp = (hugepd_t *)pu;
 		else if (!pud_none(*pu)) {
 			pdshift = PMD_SHIFT;
 			pm = pmd_offset(pu, ea);
-			if (is_hugepd(pm))
+
+			if (pmd_huge(*pm)) {
+				ret_pte = (pte_t *) pm;
+				goto out;
+			} else if (is_hugepd(pm))
 				hpdp = (hugepd_t *)pm;
-			else if (!pmd_none(*pm)) {
+			else if (!pmd_none(*pm))
 				return pte_offset_kernel(pm, ea);
-			}
 		}
 	}
-
 	if (!hpdp)
 		return NULL;
 
+	ret_pte = hugepte_offset(hpdp, ea, pdshift);
+	pdshift = hugepd_shift(*hpdp);
+out:
 	if (shift)
-		*shift = hugepd_shift(*hpdp);
-	return hugepte_offset(hpdp, ea, pdshift);
+		*shift = pdshift;
+	return ret_pte;
 }
 EXPORT_SYMBOL_GPL(find_linux_pte_or_hugepte);
 
@@ -145,6 +199,7 @@ static int __hugepte_alloc(struct mm_struct *mm, hugepd_t *hpdp,
 		if (unlikely(!hugepd_none(*hpdp)))
 			break;
 		else
+			/* We use the old format for PPC_FSL_BOOK3E */
 			hpdp->pd = ((unsigned long)new & ~PD_HUGE) | pshift;
 	}
 	/* If we bailed from the for loop early, an error occurred, clean up */
@@ -156,9 +211,15 @@ static int __hugepte_alloc(struct mm_struct *mm, hugepd_t *hpdp,
 #else
 	if (!hugepd_none(*hpdp))
 		kmem_cache_free(cachep, new);
-	else
+	else {
+#ifdef CONFIG_PPC_BOOK3S_64
+		hpdp->pd = (unsigned long)new |
+			    (shift_to_mmu_psize(pshift) << 2);
+#else
 		hpdp->pd = ((unsigned long)new & ~PD_HUGE) | pshift;
 #endif
+	}
+#endif
 	spin_unlock(&mm->page_table_lock);
 	return 0;
 }
@@ -175,6 +236,61 @@ static int __hugepte_alloc(struct mm_struct *mm, hugepd_t *hpdp,
 #define HUGEPD_PUD_SHIFT PMD_SHIFT
 #endif
 
+#ifdef CONFIG_PPC_BOOK3S_64
+/*
+ * At this point we do the placement change only for BOOK3S 64. This would
+ * possibly work on other subarchs.
+ */
+pte_t *huge_pte_alloc(struct mm_struct *mm, unsigned long addr, unsigned long sz)
+{
+	pgd_t *pg;
+	pud_t *pu;
+	pmd_t *pm;
+	hugepd_t *hpdp = NULL;
+	unsigned pshift = __ffs(sz);
+	unsigned pdshift = PGDIR_SHIFT;
+
+	addr &= ~(sz-1);
+	pg = pgd_offset(mm, addr);
+
+	if (pshift == PGDIR_SHIFT)
+		/* 16GB huge page */
+		return (pte_t *) pg;
+	else if (pshift > PUD_SHIFT)
+		/*
+		 * We need to use hugepd table
+		 */
+		hpdp = (hugepd_t *)pg;
+	else {
+		pdshift = PUD_SHIFT;
+		pu = pud_alloc(mm, pg, addr);
+		if (pshift == PUD_SHIFT)
+			return (pte_t *)pu;
+		else if (pshift > PMD_SHIFT)
+			hpdp = (hugepd_t *)pu;
+		else {
+			pdshift = PMD_SHIFT;
+			pm = pmd_alloc(mm, pu, addr);
+			if (pshift == PMD_SHIFT)
+				/* 16MB hugepage */
+				return (pte_t *)pm;
+			else
+				hpdp = (hugepd_t *)pm;
+		}
+	}
+	if (!hpdp)
+		return NULL;
+
+	BUG_ON(!hugepd_none(*hpdp) && !hugepd_ok(*hpdp));
+
+	if (hugepd_none(*hpdp) && __hugepte_alloc(mm, hpdp, addr, pdshift, pshift))
+		return NULL;
+
+	return hugepte_offset(hpdp, addr, pdshift);
+}
+
+#else
+
 pte_t *huge_pte_alloc(struct mm_struct *mm, unsigned long addr, unsigned long sz)
 {
 	pgd_t *pg;
@@ -212,6 +328,7 @@ pte_t *huge_pte_alloc(struct mm_struct *mm, unsigned long addr, unsigned long sz
 
 	return hugepte_offset(hpdp, addr, pdshift);
 }
+#endif
 
 #ifdef CONFIG_PPC_FSL_BOOK3E
 /* Build list of addresses of gigantic pages.  This function is used in early
@@ -475,8 +592,14 @@ static void hugetlb_free_pmd_range(struct mmu_gather *tlb, pud_t *pud,
 	do {
 		pmd = pmd_offset(pud, addr);
 		next = pmd_addr_end(addr, end);
-		if (pmd_none(*pmd))
+		if (!is_hugepd(pmd)) {
+			/*
+			 * if it is not hugepd pointer, we should already find
+			 * it cleared.
+			 */
+			WARN_ON(!pmd_none_or_clear_bad(pmd));
 			continue;
+		}
 #ifdef CONFIG_PPC_FSL_BOOK3E
 		/*
 		 * Increment next by the size of the huge mapping since
@@ -628,16 +751,6 @@ follow_huge_addr(struct mm_struct *mm, unsigned long address, int write)
 	return page;
 }
 
-int pmd_huge(pmd_t pmd)
-{
-	return 0;
-}
-
-int pud_huge(pud_t pud)
-{
-	return 0;
-}
-
 struct page *
 follow_huge_pmd(struct mm_struct *mm, unsigned long address,
 		pmd_t *pmd, int write)
@@ -646,8 +759,8 @@ follow_huge_pmd(struct mm_struct *mm, unsigned long address,
 	return NULL;
 }
 
-static noinline int gup_hugepte(pte_t *ptep, unsigned long sz, unsigned long addr,
-		       unsigned long end, int write, struct page **pages, int *nr)
+int gup_hugepte(pte_t *ptep, unsigned long sz, unsigned long addr,
+		unsigned long end, int write, struct page **pages, int *nr)
 {
 	unsigned long mask;
 	unsigned long pte_end;
@@ -742,7 +855,7 @@ unsigned long hugetlb_get_unmapped_area(struct file *file, unsigned long addr,
 	struct hstate *hstate = hstate_file(file);
 	int mmu_psize = shift_to_mmu_psize(huge_page_shift(hstate));
 
-	return slice_get_unmapped_area(addr, len, flags, mmu_psize, 1, 0);
+	return slice_get_unmapped_area(addr, len, flags, mmu_psize, 1);
 }
 #endif
 
@@ -883,11 +996,16 @@ static int __init hugetlbpage_init(void)
 			pdshift = PUD_SHIFT;
 		else
 			pdshift = PGDIR_SHIFT;
-
-		pgtable_cache_add(pdshift - shift, NULL);
-		if (!PGT_CACHE(pdshift - shift))
-			panic("hugetlbpage_init(): could not create "
-			      "pgtable cache for %d bit pagesize\n", shift);
+		/*
+		 * if we have pdshift and shift value same, we don't
+		 * use pgt cache for hugepd.
+		 */
+		if (pdshift != shift) {
+			pgtable_cache_add(pdshift - shift, NULL);
+			if (!PGT_CACHE(pdshift - shift))
+				panic("hugetlbpage_init(): could not create "
+				      "pgtable cache for %d bit pagesize\n", shift);
+		}
 	}
 
 	/* Set default large page size. Currently, we pick 16M or 1M