Merge branch 'upstream' of git://git.linux-mips.org/pub/scm/ralf/upstream-linus

Pull MIPS updates from Ralf Baechle:

 - More work on DT support for various platforms

 - Various fixes that were to late to make it straight into 3.9

 - Improved platform support, in particular the Netlogic XLR and
   BCM63xx, and the SEAD3 and Malta eval boards.

 - Support for several Ralink SOC families.

 - Complete support for the microMIPS ASE which basically reencodes the
   existing MIPS32/MIPS64 ISA to use non-constant size instructions.

 - Some fallout from LTO work which remove old cruft and will generally
   make the MIPS kernel easier to maintain and resistant to compiler
   optimization, even in absence of LTO.

 - KVM support.  While MIPS has announced hardware virtualization
   extensions this KVM extension uses trap and emulate mode for
   virtualization of MIPS32.  More KVM work to add support for VZ
   hardware virtualizaiton extensions and MIPS64 will probably already
   be merged for 3.11.

Most of this has been sitting in -next for a long time.  All defconfigs
have been build or run time tested except three for which fixes are being
sent by other maintainers.

Semantic conflict with kvm updates done as per Ralf

* 'upstream' of git://git.linux-mips.org/pub/scm/ralf/upstream-linus: (118 commits)
  MIPS: Add new GIC clockevent driver.
  MIPS: Formatting clean-ups for clocksources.
  MIPS: Refactor GIC clocksource code.
  MIPS: Move 'gic_frequency' to common location.
  MIPS: Move 'gic_present' to common location.
  MIPS: MIPS16e: Add unaligned access support.
  MIPS: MIPS16e: Support handling of delay slots.
  MIPS: MIPS16e: Add instruction formats.
  MIPS: microMIPS: Optimise 'strnlen' core library function.
  MIPS: microMIPS: Optimise 'strlen' core library function.
  MIPS: microMIPS: Optimise 'strncpy' core library function.
  MIPS: microMIPS: Optimise 'memset' core library function.
  MIPS: microMIPS: Add configuration option for microMIPS kernel.
  MIPS: microMIPS: Disable LL/SC and fix linker bug.
  MIPS: microMIPS: Add vdso support.
  MIPS: microMIPS: Add unaligned access support.
  MIPS: microMIPS: Support handling of delay slots.
  MIPS: microMIPS: Add support for exception handling.
  MIPS: microMIPS: Floating point support.
  MIPS: microMIPS: Fix macro naming in micro-assembler.
  ...

1 files changed, 31 insertions, 0 deletions

diff --git a/arch/mips/kvm/00README.txt b/arch/mips/kvm/00README.txt
new file mode 100644
index 00000000000..51617e481aa
--- /dev/null
+++ b/arch/mips/kvm/00README.txt
@@ -0,0 +1,31 @@
+KVM/MIPS Trap & Emulate Release Notes
+=====================================
+
+(1) KVM/MIPS should support MIPS32R2 and beyond. It has been tested on the following platforms:
+    Malta Board with FPGA based 34K
+    Sigma Designs TangoX board with a 24K based 8654 SoC.
+    Malta Board with 74K @ 1GHz
+
+(2) Both Guest kernel and Guest Userspace execute in UM.
+    Guest User address space:   0x00000000 -> 0x40000000
+    Guest Kernel Unmapped:      0x40000000 -> 0x60000000
+    Guest Kernel Mapped:        0x60000000 -> 0x80000000
+
+    Guest Usermode virtual memory is limited to 1GB.
+
+(2) 16K Page Sizes: Both Host Kernel and Guest Kernel should have the same page size, currently at least 16K.
+    Note that due to cache aliasing issues, 4K page sizes are NOT supported.
+
+(3) No HugeTLB Support
+    Both the host kernel and Guest kernel should have the page size set to 16K.
+    This will be implemented in a future release.
+
+(4) KVM/MIPS does not have support for SMP Guests
+    Linux-3.7-rc2 based SMP guest hangs due to the following code sequence in the generated TLB handlers:
+	LL/TLBP/SC.  Since the TLBP instruction causes a trap the reservation gets cleared
+	when we ERET back to the guest. This causes the guest to hang in an infinite loop.
+	This will be fixed in a future release.
+
+(5) Use Host FPU
+    Currently KVM/MIPS emulates a 24K CPU without a FPU.
+    This will be fixed in a future release