linux-toradex.git/arch/mips/kernel, branch v4.0-rc2

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

2015-02-22T03:41:38+00:00

Pull MIPS updates from Ralf Baechle:
 "This is the main pull request for MIPS:

   - a number of fixes that didn't make the 3.19 release.

   - a number of cleanups.

   - preliminary support for Cavium's Octeon 3 SOCs which feature up to
     48 MIPS64 R3 cores with FPU and hardware virtualization.

   - support for MIPS R6 processors.

     Revision 6 of the MIPS architecture is a major revision of the MIPS
     architecture which does away with many of original sins of the
     architecture such as branch delay slots.  This and other changes in
     R6 require major changes throughout the entire MIPS core
     architecture code and make up for the lion share of this pull
     request.

   - finally some preparatory work for eXtendend Physical Address
     support, which allows support of up to 40 bit of physical address
     space on 32 bit processors"

     [ Ahh, MIPS can't leave the PAE brain damage alone.  It's like
       every CPU architect has to make that mistake, but pee in the snow
       by changing the TLA.  But whether it's called PAE, LPAE or XPA,
       it's horrid crud   - Linus ]

* 'upstream' of git://git.linux-mips.org/pub/scm/ralf/upstream-linus: (114 commits)
  MIPS: sead3: Corrected get_c0_perfcount_int
  MIPS: mm: Remove dead macro definitions
  MIPS: OCTEON: irq: add CIB and other fixes
  MIPS: OCTEON: Don't do acknowledge operations for level triggered irqs.
  MIPS: OCTEON: More OCTEONIII support
  MIPS: OCTEON: Remove setting of processor specific CVMCTL icache bits.
  MIPS: OCTEON: Core-15169 Workaround and general CVMSEG cleanup.
  MIPS: OCTEON: Update octeon-model.h code for new SoCs.
  MIPS: OCTEON: Implement DCache errata workaround for all CN6XXX
  MIPS: OCTEON: Add little-endian support to asm/octeon/octeon.h
  MIPS: OCTEON: Implement the core-16057 workaround
  MIPS: OCTEON: Delete unused COP2 saving code
  MIPS: OCTEON: Use correct instruction to read 64-bit COP0 register
  MIPS: OCTEON: Save and restore CP2 SHA3 state
  MIPS: OCTEON: Fix FP context save.
  MIPS: OCTEON: Save/Restore wider multiply registers in OCTEON III CPUs
  MIPS: boot: Provide more uImage options
  MIPS: Remove unneeded #ifdef __KERNEL__ from asm/processor.h
  MIPS: ip22-gio: Remove legacy suspend/resume support
  mips: pci: Add ifdef around pci_proc_domain
  ...

MIPS: OCTEON: Delete unused COP2 saving code

2015-02-20T14:30:23+00:00

Commit 2c952e06e4f5 ("MIPS: Move cop2 save/restore to switch_to()")
removes assembler code to store COP2 registers.  Commit
a36d8225bceb ("MIPS: OCTEON: Enable use of FPU") mistakenly
restores it

Fixes: a36d8225bceb ("MIPS: OCTEON: Enable use of FPU")
Signed-off-by: Aleksey Makarov 
Cc: linux-mips@linux-mips.org
Cc: linux-kernel@vger.kernel.org
Cc: David Daney 
Patchwork: https://patchwork.linux-mips.org/patch/8937/
Signed-off-by: Ralf Baechle

MIPS: OCTEON: Use correct instruction to read 64-bit COP0 register

2015-02-20T14:29:36+00:00

Use dmfc0/dmtc0 instructions for reading CvmMemCtl COP0 register,
its a 64-bit wide.

Signed-off-by: Chandrakala Chavva 
Signed-off-by: Aleksey Makarov 
Cc: linux-mips@linux-mips.org
Cc: linux-kernel@vger.kernel.org
Cc: David Daney 
Patchwork: https://patchwork.linux-mips.org/patch/8936/
Signed-off-by: Ralf Baechle

MIPS: OCTEON: Save and restore CP2 SHA3 state

2015-02-20T14:29:08+00:00

Allocate new save space, and then save/restore the registers if
OCTEON III.

Signed-off-by: David Daney 
Signed-off-by: Aleksey Makarov 
Cc: linux-mips@linux-mips.org
Cc: linux-kernel@vger.kernel.org
Patchwork: https://patchwork.linux-mips.org/patch/8935/
Signed-off-by: Ralf Baechle

MIPS: OCTEON: Fix FP context save.

2015-02-20T14:28:51+00:00

It wasn't being saved on task switch.

Signed-off-by: David Daney 
Signed-off-by: Aleksey Makarov 
Cc: linux-mips@linux-mips.org
Cc: linux-kernel@vger.kernel.org
Patchwork: https://patchwork.linux-mips.org/patch/8934/
Signed-off-by: Ralf Baechle

MIPS: OCTEON: Save/Restore wider multiply registers in OCTEON III CPUs

2015-02-20T14:28:29+00:00

The wide multiplier is twice as wide, so we need to save twice as much
state.  Detect the multiplier type (CPU type) at start up and install
model specific handlers.

[aleksey.makarov@auriga.com:
	conflict resolution,
	support for old compilers]

Signed-off-by: David Daney 
Signed-off-by: Leonid Rosenboim 
Signed-off-by: Aleksey Makarov 
Cc: linux-mips@linux-mips.org
Cc: linux-kernel@vger.kernel.org
Patchwork: https://patchwork.linux-mips.org/patch/8933/
Signed-off-by: Ralf Baechle

MIPS: Add set/clear CP0 macros for PageGrain register

2015-02-20T11:55:18+00:00

Build set and clear macros for the PageGrain register.

Signed-off-by: Steven J. Hill 
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/9289/
Signed-off-by: Ralf Baechle

Merge branch 'mipsr6-for-3.20' of git://git.linux-mips.org/pub/scm/mchandras/linux into mips-for-linux-next

2015-02-19T15:00:34+00:00

MIPS: Export MSA functions used by lose_fpu(1) for KVM

2015-02-19T14:59:44+00:00

Export the _save_msa asm function used by the lose_fpu(1) macro to GPL
modules so that KVM can make use of it when it is built as a module.

This fixes the following build error when CONFIG_KVM=m and
CONFIG_CPU_HAS_MSA=y due to commit f798217dfd03 ("KVM: MIPS: Don't leak
FPU/DSP to guest"):

ERROR: "_save_msa" [arch/mips/kvm/kvm.ko] undefined!

Fixes: f798217dfd03 (KVM: MIPS: Don't leak FPU/DSP to guest)
Signed-off-by: James Hogan 
Cc: Paolo Bonzini 
Cc: Ralf Baechle 
Cc: Paul Burton 
Cc: Gleb Natapov 
Cc: kvm@vger.kernel.org
Cc: linux-mips@linux-mips.org
Cc:  # 3.15+
Patchwork: https://patchwork.linux-mips.org/patch/9261/
Signed-off-by: Ralf Baechle

MIPS: Export FP functions used by lose_fpu(1) for KVM

2015-02-19T14:58:51+00:00

Export the _save_fp asm function used by the lose_fpu(1) macro to GPL
modules so that KVM can make use of it when it is built as a module.

This fixes the following build error when CONFIG_KVM=m due to commit
f798217dfd03 ("KVM: MIPS: Don't leak FPU/DSP to guest"):

ERROR: "_save_fp" [arch/mips/kvm/kvm.ko] undefined!

Signed-off-by: James Hogan 
Fixes: f798217dfd03 (KVM: MIPS: Don't leak FPU/DSP to guest)
Cc: Paolo Bonzini 
Cc: Ralf Baechle 
Cc: Paul Burton 
Cc: Gleb Natapov 
Cc: kvm@vger.kernel.org
Cc: linux-mips@linux-mips.org
Cc:  # 3.10+
Patchwork: https://patchwork.linux-mips.org/patch/9260/
Signed-off-by: Ralf Baechle