Merge remote-tracking branch 'linus/master' into merge

Conflicts:
	Documentation/hwmon/ina2xx
	arch/powerpc/Kconfig
	arch/powerpc/boot/dts/b4860emu.dts
	arch/powerpc/boot/dts/b4qds.dtsi
	arch/powerpc/boot/dts/fsl/b4si-post.dtsi
	arch/powerpc/boot/dts/fsl/qoriq-sec6.0-0.dtsi
	arch/powerpc/boot/dts/p1023rdb.dts
	arch/powerpc/boot/dts/t4240emu.dts
	arch/powerpc/boot/dts/t4240qds.dts
	arch/powerpc/configs/85xx/p1023_defconfig
	arch/powerpc/configs/corenet32_smp_defconfig
	arch/powerpc/configs/corenet64_smp_defconfig
	arch/powerpc/configs/mpc85xx_smp_defconfig
	arch/powerpc/include/asm/cputable.h
	arch/powerpc/include/asm/device.h
	arch/powerpc/include/asm/epapr_hcalls.h
	arch/powerpc/include/asm/kvm_host.h
	arch/powerpc/include/asm/mpic.h
	arch/powerpc/include/asm/pci.h
	arch/powerpc/include/asm/ppc-opcode.h
	arch/powerpc/include/asm/ppc_asm.h
	arch/powerpc/include/asm/reg_booke.h
	arch/powerpc/kernel/epapr_paravirt.c
	arch/powerpc/kernel/process.c
	arch/powerpc/kernel/prom.c
	arch/powerpc/kernel/setup-common.c
	arch/powerpc/kernel/setup_32.c
	arch/powerpc/kernel/setup_64.c
	arch/powerpc/kernel/smp.c
	arch/powerpc/kernel/swsusp_asm64.S
	arch/powerpc/kernel/swsusp_booke.S
	arch/powerpc/kvm/book3s_pr.c
	arch/powerpc/kvm/booke.c
	arch/powerpc/kvm/booke.h
	arch/powerpc/kvm/e500.c
	arch/powerpc/kvm/e500.h
	arch/powerpc/kvm/e500_emulate.c
	arch/powerpc/kvm/e500mc.c
	arch/powerpc/kvm/powerpc.c
	arch/powerpc/perf/e6500-pmu.c
	arch/powerpc/platforms/85xx/Kconfig
	arch/powerpc/platforms/85xx/Makefile
	arch/powerpc/platforms/85xx/b4_qds.c
	arch/powerpc/platforms/85xx/c293pcie.c
	arch/powerpc/platforms/85xx/corenet_ds.c
	arch/powerpc/platforms/85xx/corenet_ds.h
	arch/powerpc/platforms/85xx/p1023_rds.c
	arch/powerpc/platforms/85xx/p2041_rdb.c
	arch/powerpc/platforms/85xx/p3041_ds.c
	arch/powerpc/platforms/85xx/p4080_ds.c
	arch/powerpc/platforms/85xx/p5020_ds.c
	arch/powerpc/platforms/85xx/p5040_ds.c
	arch/powerpc/platforms/85xx/smp.c
	arch/powerpc/platforms/85xx/t4240_qds.c
	arch/powerpc/platforms/Kconfig
	arch/powerpc/sysdev/Makefile
	arch/powerpc/sysdev/fsl_mpic_timer_wakeup.c
	arch/powerpc/sysdev/fsl_msi.c
	arch/powerpc/sysdev/fsl_pci.c
	arch/powerpc/sysdev/fsl_pci.h
	arch/powerpc/sysdev/fsl_soc.h
	arch/powerpc/sysdev/mpic.c
	arch/powerpc/sysdev/mpic_timer.c
	drivers/Kconfig
	drivers/clk/Kconfig
	drivers/clk/clk-ppc-corenet.c
	drivers/cpufreq/Kconfig.powerpc
	drivers/cpufreq/Makefile
	drivers/cpufreq/ppc-corenet-cpufreq.c
	drivers/crypto/caam/Kconfig
	drivers/crypto/caam/Makefile
	drivers/crypto/caam/ctrl.c
	drivers/crypto/caam/desc_constr.h
	drivers/crypto/caam/intern.h
	drivers/crypto/caam/jr.c
	drivers/crypto/caam/regs.h
	drivers/dma/fsldma.c
	drivers/hwmon/ina2xx.c
	drivers/iommu/Kconfig
	drivers/iommu/fsl_pamu.c
	drivers/iommu/fsl_pamu.h
	drivers/iommu/fsl_pamu_domain.c
	drivers/iommu/fsl_pamu_domain.h
	drivers/misc/Makefile
	drivers/mmc/card/block.c
	drivers/mmc/core/core.c
	drivers/mmc/host/sdhci-esdhc.h
	drivers/mmc/host/sdhci-pltfm.c
	drivers/mtd/nand/fsl_ifc_nand.c
	drivers/net/ethernet/freescale/gianfar.c
	drivers/net/ethernet/freescale/gianfar.h
	drivers/net/ethernet/freescale/gianfar_ethtool.c
	drivers/net/phy/at803x.c
	drivers/net/phy/phy_device.c
	drivers/net/phy/vitesse.c
	drivers/pci/msi.c
	drivers/staging/Kconfig
	drivers/staging/Makefile
	drivers/uio/Kconfig
	drivers/uio/Makefile
	drivers/uio/uio.c
	drivers/usb/host/ehci-fsl.c
	drivers/vfio/Kconfig
	drivers/vfio/Makefile
	include/crypto/algapi.h
	include/linux/iommu.h
	include/linux/mmc/sdhci.h
	include/linux/msi.h
	include/linux/netdev_features.h
	include/linux/phy.h
	include/linux/skbuff.h
	include/net/ip.h
	include/uapi/linux/vfio.h
	net/core/ethtool.c
	net/ipv4/route.c
	net/ipv6/route.c

1 files changed, 175 insertions, 0 deletions

diff --git a/arch/powerpc/mm/hugepage-hash64.c b/arch/powerpc/mm/hugepage-hash64.c
new file mode 100644
index 0000000..34de9e0
--- /dev/null
+++ b/arch/powerpc/mm/hugepage-hash64.c
@@ -0,0 +1,175 @@
+/*
+ * Copyright IBM Corporation, 2013
+ * Author Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of version 2.1 of the GNU Lesser General Public License
+ * as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it would be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+ *
+ */
+
+/*
+ * PPC64 THP Support for hash based MMUs
+ */
+#include <linux/mm.h>
+#include <asm/machdep.h>
+
+int __hash_page_thp(unsigned long ea, unsigned long access, unsigned long vsid,
+		    pmd_t *pmdp, unsigned long trap, int local, int ssize,
+		    unsigned int psize)
+{
+	unsigned int index, valid;
+	unsigned char *hpte_slot_array;
+	unsigned long rflags, pa, hidx;
+	unsigned long old_pmd, new_pmd;
+	int ret, lpsize = MMU_PAGE_16M;
+	unsigned long vpn, hash, shift, slot;
+
+	/*
+	 * atomically mark the linux large page PMD busy and dirty
+	 */
+	do {
+		old_pmd = pmd_val(*pmdp);
+		/* If PMD busy, retry the access */
+		if (unlikely(old_pmd & _PAGE_BUSY))
+			return 0;
+		/* If PMD is trans splitting retry the access */
+		if (unlikely(old_pmd & _PAGE_SPLITTING))
+			return 0;
+		/* If PMD permissions don't match, take page fault */
+		if (unlikely(access & ~old_pmd))
+			return 1;
+		/*
+		 * Try to lock the PTE, add ACCESSED and DIRTY if it was
+		 * a write access
+		 */
+		new_pmd = old_pmd | _PAGE_BUSY | _PAGE_ACCESSED;
+		if (access & _PAGE_RW)
+			new_pmd |= _PAGE_DIRTY;
+	} while (old_pmd != __cmpxchg_u64((unsigned long *)pmdp,
+					  old_pmd, new_pmd));
+	/*
+	 * PP bits. _PAGE_USER is already PP bit 0x2, so we only
+	 * need to add in 0x1 if it's a read-only user page
+	 */
+	rflags = new_pmd & _PAGE_USER;
+	if ((new_pmd & _PAGE_USER) && !((new_pmd & _PAGE_RW) &&
+					   (new_pmd & _PAGE_DIRTY)))
+		rflags |= 0x1;
+	/*
+	 * _PAGE_EXEC -> HW_NO_EXEC since it's inverted
+	 */
+	rflags |= ((new_pmd & _PAGE_EXEC) ? 0 : HPTE_R_N);
+
+#if 0
+	if (!cpu_has_feature(CPU_FTR_COHERENT_ICACHE)) {
+
+		/*
+		 * No CPU has hugepages but lacks no execute, so we
+		 * don't need to worry about that case
+		 */
+		rflags = hash_page_do_lazy_icache(rflags, __pte(old_pte), trap);
+	}
+#endif
+	/*
+	 * Find the slot index details for this ea, using base page size.
+	 */
+	shift = mmu_psize_defs[psize].shift;
+	index = (ea & ~HPAGE_PMD_MASK) >> shift;
+	BUG_ON(index >= 4096);
+
+	vpn = hpt_vpn(ea, vsid, ssize);
+	hash = hpt_hash(vpn, shift, ssize);
+	hpte_slot_array = get_hpte_slot_array(pmdp);
+
+	valid = hpte_valid(hpte_slot_array, index);
+	if (valid) {
+		/* update the hpte bits */
+		hidx =  hpte_hash_index(hpte_slot_array, index);
+		if (hidx & _PTEIDX_SECONDARY)
+			hash = ~hash;
+		slot = (hash & htab_hash_mask) * HPTES_PER_GROUP;
+		slot += hidx & _PTEIDX_GROUP_IX;
+
+		ret = ppc_md.hpte_updatepp(slot, rflags, vpn,
+					   psize, lpsize, ssize, local);
+		/*
+		 * We failed to update, try to insert a new entry.
+		 */
+		if (ret == -1) {
+			/*
+			 * large pte is marked busy, so we can be sure
+			 * nobody is looking at hpte_slot_array. hence we can
+			 * safely update this here.
+			 */
+			valid = 0;
+			new_pmd &= ~_PAGE_HPTEFLAGS;
+			hpte_slot_array[index] = 0;
+		} else
+			/* clear the busy bits and set the hash pte bits */
+			new_pmd = (new_pmd & ~_PAGE_HPTEFLAGS) | _PAGE_HASHPTE;
+	}
+
+	if (!valid) {
+		unsigned long hpte_group;
+
+		/* insert new entry */
+		pa = pmd_pfn(__pmd(old_pmd)) << PAGE_SHIFT;
+repeat:
+		hpte_group = ((hash & htab_hash_mask) * HPTES_PER_GROUP) & ~0x7UL;
+
+		/* clear the busy bits and set the hash pte bits */
+		new_pmd = (new_pmd & ~_PAGE_HPTEFLAGS) | _PAGE_HASHPTE;
+
+		/* Add in WIMG bits */
+		rflags |= (new_pmd & (_PAGE_WRITETHRU | _PAGE_NO_CACHE |
+				      _PAGE_COHERENT | _PAGE_GUARDED));
+
+		/* Insert into the hash table, primary slot */
+		slot = ppc_md.hpte_insert(hpte_group, vpn, pa, rflags, 0,
+					  psize, lpsize, ssize);
+		/*
+		 * Primary is full, try the secondary
+		 */
+		if (unlikely(slot == -1)) {
+			hpte_group = ((~hash & htab_hash_mask) *
+				      HPTES_PER_GROUP) & ~0x7UL;
+			slot = ppc_md.hpte_insert(hpte_group, vpn, pa,
+						  rflags, HPTE_V_SECONDARY,
+						  psize, lpsize, ssize);
+			if (slot == -1) {
+				if (mftb() & 0x1)
+					hpte_group = ((hash & htab_hash_mask) *
+						      HPTES_PER_GROUP) & ~0x7UL;
+
+				ppc_md.hpte_remove(hpte_group);
+				goto repeat;
+			}
+		}
+		/*
+		 * Hypervisor failure. Restore old pmd and return -1
+		 * similar to __hash_page_*
+		 */
+		if (unlikely(slot == -2)) {
+			*pmdp = __pmd(old_pmd);
+			hash_failure_debug(ea, access, vsid, trap, ssize,
+					   psize, lpsize, old_pmd);
+			return -1;
+		}
+		/*
+		 * large pte is marked busy, so we can be sure
+		 * nobody is looking at hpte_slot_array. hence we can
+		 * safely update this here.
+		 */
+		mark_hpte_slot_valid(hpte_slot_array, index, slot);
+	}
+	/*
+	 * No need to use ldarx/stdcx here
+	 */
+	*pmdp = __pmd(new_pmd & ~_PAGE_BUSY);
+	return 0;
+}