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: (26 commits)
  arch/tile: prefer "tilepro" as the name of the 32-bit architecture
  compat: include aio_abi.h for aio_context_t
  arch/tile: cleanups for tilegx compat mode
  arch/tile: allocate PCI IRQs later in boot
  arch/tile: support signal "exception-trace" hook
  arch/tile: use better definitions of xchg() and cmpxchg()
  include/linux/compat.h: coding-style fixes
  tile: add an RTC driver for the Tilera hypervisor
  arch/tile: finish enabling support for TILE-Gx 64-bit chip
  compat: fixes to allow working with tile arch
  arch/tile: update defconfig file to something more useful
  tile: do_hardwall_trap: do not play with task->sighand
  tile: replace mm->cpu_vm_mask with mm_cpumask()
  tile,mn10300: add device parameter to dma_cache_sync()
  audit: support the "standard" <asm-generic/unistd.h>
  arch/tile: clarify flush_buffer()/finv_buffer() function names
  arch/tile: kernel-related cleanups from removing static page size
  arch/tile: various header improvements for building drivers
  arch/tile: disable GX prefetcher during cache flush
  arch/tile: tolerate disabling CONFIG_BLK_DEV_INITRD
  ...

2 files changed, 206 insertions, 11 deletions

diff --git a/arch/tile/mm/fault.c b/arch/tile/mm/fault.c
index 51f8663..25b7b90 100644
--- a/arch/tile/mm/fault.c
+++ b/arch/tile/mm/fault.c
@@ -43,8 +43,11 @@
 
 #include <arch/interrupts.h>
 
-static noinline void force_sig_info_fault(int si_signo, int si_code,
-	unsigned long address, int fault_num, struct task_struct *tsk)
+static noinline void force_sig_info_fault(const char *type, int si_signo,
+					  int si_code, unsigned long address,
+					  int fault_num,
+					  struct task_struct *tsk,
+					  struct pt_regs *regs)
 {
 	siginfo_t info;
 
@@ -59,6 +62,7 @@ static noinline void force_sig_info_fault(int si_signo, int si_code,
 	info.si_code = si_code;
 	info.si_addr = (void __user *)address;
 	info.si_trapno = fault_num;
+	trace_unhandled_signal(type, regs, address, si_signo);
 	force_sig_info(si_signo, &info, tsk);
 }
 
@@ -71,11 +75,12 @@ SYSCALL_DEFINE2(cmpxchg_badaddr, unsigned long, address,
 		struct pt_regs *, regs)
 {
 	if (address >= PAGE_OFFSET)
-		force_sig_info_fault(SIGSEGV, SEGV_MAPERR, address,
-				     INT_DTLB_MISS, current);
+		force_sig_info_fault("atomic segfault", SIGSEGV, SEGV_MAPERR,
+				     address, INT_DTLB_MISS, current, regs);
 	else
-		force_sig_info_fault(SIGBUS, BUS_ADRALN, address,
-				     INT_UNALIGN_DATA, current);
+		force_sig_info_fault("atomic alignment fault", SIGBUS,
+				     BUS_ADRALN, address,
+				     INT_UNALIGN_DATA, current, regs);
 
 	/*
 	 * Adjust pc to point at the actual instruction, which is unusual
@@ -471,8 +476,8 @@ bad_area_nosemaphore:
 		 */
 		local_irq_enable();
 
-		force_sig_info_fault(SIGSEGV, si_code, address,
-				     fault_num, tsk);
+		force_sig_info_fault("segfault", SIGSEGV, si_code, address,
+				     fault_num, tsk, regs);
 		return 0;
 	}
 
@@ -547,7 +552,8 @@ do_sigbus:
 	if (is_kernel_mode)
 		goto no_context;
 
-	force_sig_info_fault(SIGBUS, BUS_ADRERR, address, fault_num, tsk);
+	force_sig_info_fault("bus error", SIGBUS, BUS_ADRERR, address,
+			     fault_num, tsk, regs);
 	return 0;
 }
 
@@ -732,6 +738,7 @@ void do_page_fault(struct pt_regs *regs, int fault_num,
 		panic("Bad fault number %d in do_page_fault", fault_num);
 	}
 
+#if CHIP_HAS_TILE_DMA() || CHIP_HAS_SN_PROC()
 	if (EX1_PL(regs->ex1) != USER_PL) {
 		struct async_tlb *async;
 		switch (fault_num) {
@@ -775,6 +782,7 @@ void do_page_fault(struct pt_regs *regs, int fault_num,
 			return;
 		}
 	}
+#endif
 
 	handle_page_fault(regs, fault_num, is_page_fault, address, write);
 }
@@ -801,8 +809,6 @@ static void handle_async_page_fault(struct pt_regs *regs,
 				  async->address, async->is_write);
 	}
 }
-#endif /* CHIP_HAS_TILE_DMA() || CHIP_HAS_SN_PROC() */
-
 
 /*
  * This routine effectively re-issues asynchronous page faults
@@ -824,6 +830,8 @@ void do_async_page_fault(struct pt_regs *regs)
 	handle_async_page_fault(regs, &current->thread.sn_async_tlb);
 #endif
 }
+#endif /* CHIP_HAS_TILE_DMA() || CHIP_HAS_SN_PROC() */
+
 
 void vmalloc_sync_all(void)
 {
diff --git a/arch/tile/mm/migrate_64.S b/arch/tile/mm/migrate_64.S
new file mode 100644
index 0000000..e76fea6
--- /dev/null
+++ b/arch/tile/mm/migrate_64.S
@@ -0,0 +1,187 @@
+/*
+ * Copyright 2011 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.
+ *
+ * This routine is a helper for migrating the home of a set of pages to
+ * a new cpu.  See the documentation in homecache.c for more information.
+ */
+
+#include <linux/linkage.h>
+#include <linux/threads.h>
+#include <asm/page.h>
+#include <asm/thread_info.h>
+#include <asm/types.h>
+#include <asm/asm-offsets.h>
+#include <hv/hypervisor.h>
+
+	.text
+
+/*
+ * First, some definitions that apply to all the code in the file.
+ */
+
+/* Locals (caller-save) */
+#define r_tmp		r10
+#define r_save_sp	r11
+
+/* What we save where in the stack frame; must include all callee-saves. */
+#define FRAME_SP	8
+#define FRAME_R30	16
+#define FRAME_R31	24
+#define FRAME_R32	32
+#define FRAME_R33	40
+#define FRAME_SIZE	48
+
+
+
+
+/*
+ * On entry:
+ *
+ *   r0 the new context PA to install (moved to r_context)
+ *   r1 PTE to use for context access (moved to r_access)
+ *   r2 ASID to use for new context (moved to r_asid)
+ *   r3 pointer to cpumask with just this cpu set in it (r_my_cpumask)
+ */
+
+/* Arguments (caller-save) */
+#define r_context_in	r0
+#define r_access_in	r1
+#define r_asid_in	r2
+#define r_my_cpumask	r3
+
+/* Locals (callee-save); must not be more than FRAME_xxx above. */
+#define r_save_ics	r30
+#define r_context	r31
+#define r_access	r32
+#define r_asid		r33
+
+/*
+ * Caller-save locals and frame constants are the same as
+ * for homecache_migrate_stack_and_flush.
+ */
+
+STD_ENTRY(flush_and_install_context)
+	/*
+	 * Create a stack frame; we can't touch it once we flush the
+	 * cache until we install the new page table and flush the TLB.
+	 */
+	{
+	 move r_save_sp, sp
+	 st sp, lr
+	 addi sp, sp, -FRAME_SIZE
+	}
+	addi r_tmp, sp, FRAME_SP
+	{
+	 st r_tmp, r_save_sp
+	 addi r_tmp, sp, FRAME_R30
+	}
+	{
+	 st r_tmp, r30
+	 addi r_tmp, sp, FRAME_R31
+	}
+	{
+	 st r_tmp, r31
+	 addi r_tmp, sp, FRAME_R32
+	}
+	{
+	 st r_tmp, r32
+	 addi r_tmp, sp, FRAME_R33
+	}
+	st r_tmp, r33
+
+	/* Move some arguments to callee-save registers. */
+	{
+	 move r_context, r_context_in
+	 move r_access, r_access_in
+	}
+	move r_asid, r_asid_in
+
+	/* Disable interrupts, since we can't use our stack. */
+	{
+	 mfspr r_save_ics, INTERRUPT_CRITICAL_SECTION
+	 movei r_tmp, 1
+	}
+	mtspr INTERRUPT_CRITICAL_SECTION, r_tmp
+
+	/* First, flush our L2 cache. */
+	{
+	 move r0, zero  /* cache_pa */
+	 moveli r1, hw2_last(HV_FLUSH_EVICT_L2)  /* cache_control */
+	}
+	{
+	 shl16insli r1, r1, hw1(HV_FLUSH_EVICT_L2)
+	 move r2, r_my_cpumask  /* cache_cpumask */
+	}
+	{
+	 shl16insli r1, r1, hw0(HV_FLUSH_EVICT_L2)
+	 move r3, zero  /* tlb_va */
+	}
+	{
+	 move r4, zero  /* tlb_length */
+	 move r5, zero  /* tlb_pgsize */
+	}
+	{
+	 move r6, zero  /* tlb_cpumask */
+	 move r7, zero  /* asids */
+	}
+	{
+	 move r8, zero  /* asidcount */
+	 jal hv_flush_remote
+	}
+	bnez r0, 1f
+
+	/* Now install the new page table. */
+	{
+	 move r0, r_context
+	 move r1, r_access
+	}
+	{
+	 move r2, r_asid
+	 movei r3, HV_CTX_DIRECTIO
+	}
+	jal hv_install_context
+	bnez r0, 1f
+
+	/* Finally, flush the TLB. */
+	{
+	 movei r0, 0   /* preserve_global */
+	 jal hv_flush_all
+	}
+
+1:      /* Reset interrupts back how they were before. */
+	mtspr INTERRUPT_CRITICAL_SECTION, r_save_ics
+
+	/* Restore the callee-saved registers and return. */
+	addli lr, sp, FRAME_SIZE
+	{
+	 ld lr, lr
+	 addli r_tmp, sp, FRAME_R30
+	}
+	{
+	 ld r30, r_tmp
+	 addli r_tmp, sp, FRAME_R31
+	}
+	{
+	 ld r31, r_tmp
+	 addli r_tmp, sp, FRAME_R32
+	}
+	{
+	 ld r32, r_tmp
+	 addli r_tmp, sp, FRAME_R33
+	}
+	{
+	 ld r33, r_tmp
+	 addi sp, sp, FRAME_SIZE
+	}
+	jrp lr
+	STD_ENDPROC(flush_and_install_context)