Merge git://git.kernel.org/pub/scm/linux/kernel/git/cmetcalf/linux-tile

* git://git.kernel.org/pub/scm/linux/kernel/git/cmetcalf/linux-tile:
  arch/tile: check kmalloc() result
  arch/tile: catch up on various minor cleanups.
  arch/tile: avoid erroneous error return for PTRACE_POKEUSR.
  tile: set ARCH_KMALLOC_MINALIGN
  tile: remove homegrown L1_CACHE_ALIGN macro
  arch/tile: Miscellaneous cleanup changes.
  arch/tile: Split the icache flush code off to a generic <arch> header.
  arch/tile: Fix bug in support for atomic64_xx() ops.
  arch/tile: Shrink the tile-opcode files considerably.
  arch/tile: Add driver to enable access to the user dynamic network.
  arch/tile: Enable more sophisticated IRQ model for 32-bit chips.
  Move list types from <linux/list.h> to <linux/types.h>.
  Add wait4() back to the set of <asm-generic/unistd.h> syscalls.
  Revert adding some arch-specific signal syscalls to <linux/syscalls.h>.
  arch/tile: Do not use GFP_KERNEL for dma_alloc_coherent(). Feedback from fujita.tomonori@lab.ntt.co.jp.
  arch/tile: core support for Tilera 32-bit chips.
  Fix up the "generic" unistd.h ABI to be more useful.

1 files changed, 50 insertions, 0 deletions

diff --git a/arch/tile/mm/migrate.h b/arch/tile/mm/migrate.h
new file mode 100644
index 00000000000..cd45a0837fa
--- /dev/null
+++ b/arch/tile/mm/migrate.h
@@ -0,0 +1,50 @@
+/*
+ * Copyright 2010 Tilera Corporation. All Rights Reserved.
+ *
+ *   This program is free software; you can redistribute it and/or
+ *   modify it under the terms of the GNU General Public License
+ *   as published by the Free Software Foundation, version 2.
+ *
+ *   This program is distributed in the hope that it will be useful, but
+ *   WITHOUT ANY WARRANTY; without even the implied warranty of
+ *   MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
+ *   NON INFRINGEMENT.  See the GNU General Public License for
+ *   more details.
+ *
+ * Structure definitions for migration, exposed here for use by
+ * arch/tile/kernel/asm-offsets.c.
+ */
+
+#ifndef MM_MIGRATE_H
+#define MM_MIGRATE_H
+
+#include <linux/cpumask.h>
+#include <hv/hypervisor.h>
+
+/*
+ * This function is used as a helper when setting up the initial
+ * page table (swapper_pg_dir).
+ */
+extern int flush_and_install_context(HV_PhysAddr page_table, HV_PTE access,
+				     HV_ASID asid,
+				     const unsigned long *cpumask);
+
+/*
+ * This function supports migration as a "helper" as follows:
+ *
+ *  - Set the stack PTE itself to "migrating".
+ *  - Do a global TLB flush for (va,length) and the specified ASIDs.
+ *  - Do a cache-evict on all necessary cpus.
+ *  - Write the new stack PTE.
+ *
+ * Note that any non-NULL pointers must not point to the page that
+ * is handled by the stack_pte itself.
+ */
+extern int homecache_migrate_stack_and_flush(pte_t stack_pte, unsigned long va,
+				     size_t length, pte_t *stack_ptep,
+				     const struct cpumask *cache_cpumask,
+				     const struct cpumask *tlb_cpumask,
+				     HV_Remote_ASID *asids,
+				     int asidcount);
+
+#endif /* MM_MIGRATE_H */