linux-toradex.git/arch/mips/kernel/asm-offsets.c, branch v4.8-rc2

MIPS: KVM: Drop now unused asm offsets

2016-07-05T14:08:48+00:00

Now that locore.S is converted to uasm, remove a bunch of the assembly
offset definitions created by asm-offsets.c, including the CPUINFO_ ones
for reading the variable asid mask, and the non FPU/MSA related VCPU_
definitions. KVM's fpu.S and msa.S still use the remaining definitions.

Signed-off-by: James Hogan 
Cc: Paolo Bonzini 
Cc: Radim KrÄmÃ¡Å™ 
Cc: Ralf Baechle 
Cc: linux-mips@linux-mips.org
Cc: kvm@vger.kernel.org
Signed-off-by: Paolo Bonzini

MIPS: KVM: Restore host EBase from ebase variable

2016-06-14T09:02:44+00:00

The host kernel's exception vector base address is currently saved in
the VCPU structure at creation time, and restored on a guest exit.
However it doesn't change and can already be easily accessed from the
'ebase' variable (arch/mips/kernel/traps.c), so drop the host_ebase
member of kvm_vcpu_arch, export the 'ebase' variable to modules and load
from there instead.

This does result in a single extra instruction (lui) on the guest exit
path, but simplifies the code a bit and removes the redundant storage of
the host exception base address.

Credit for the idea goes to Cavium's VZ KVM implementation.

Signed-off-by: James Hogan 
Cc: Paolo Bonzini 
Cc: Radim Krčmář 
Cc: Ralf Baechle 
Cc: linux-mips@linux-mips.org
Cc: kvm@vger.kernel.org
Signed-off-by: Paolo Bonzini

MIPS: KVM: Drop unused host_cp0_entryhi

2016-06-14T09:02:39+00:00

The host EntryHi in the KVM VCPU context is virtually unused. It gets
stored on exceptions, but only ever used in a kvm_debug() when a TLB
miss occurs.

Drop it entirely, removing that information from the kvm_debug output.

Signed-off-by: James Hogan 
Cc: Ralf Baechle 
Cc: Paolo Bonzini 
Cc: Radim Krčmář 
Cc: linux-mips@linux-mips.org
Cc: kvm@vger.kernel.org
Signed-off-by: Paolo Bonzini

MIPS: KVM: Drop unused guest_inst from kvm_vcpu_arch

2016-06-14T09:02:38+00:00

The MIPS kvm_vcpu_arch::guest_inst isn't used, so drop it from the
struct and drop its asm-offsets definition.

Signed-off-by: James Hogan 
Cc: Ralf Baechle 
Cc: Paolo Bonzini 
Cc: Radim Krčmář 
Cc: linux-mips@linux-mips.org
Cc: kvm@vger.kernel.org
Signed-off-by: Paolo Bonzini

MIPS: Support extended ASIDs

2016-05-13T12:02:20+00:00

Add support for extended ASIDs as determined by the Config4.AE bit.
Since the only supported CPUs known to implement this are Netlogic XLP
and MIPS I6400, select this variable ASID support based upon
CONFIG_CPU_XLP and CONFIG_CPU_MIPSR6.

Signed-off-by: Paul Burton 
Signed-off-by: James Hogan 
Cc: Jayachandran C. 
Cc: Paolo Bonzini 
Cc: Radim Krčmář 
Cc: linux-mips@linux-mips.org
Cc: kvm@vger.kernel.org
Patchwork: https://patchwork.linux-mips.org/patch/13211/
Signed-off-by: Ralf Baechle

MIPS: Set trap_no field in thread_struct on exception.

2015-09-03T10:08:04+00:00

This reverts commit 7281cd22973008a782860e48ed8d85d00204168c and adds
actual functionality to use the field.

MIPS: Use common FP sigcontext code for O32 compat

2015-09-03T10:07:56+00:00

Make use of the common FP sigcontext code for O32 binaries running on
MIPS64 kernels now that it is taking appropriate offsets into struct
sigcontext(32) from struct mips_abi.

[ralf@linux-mips.org: Fixed reject.]

Signed-off-by: Paul Burton 
Cc: linux-mips@linux-mips.org
Cc: Guenter Roeck 
Cc: Matthew Fortune 
Cc: Leonid Yegoshin 
Cc: Michael Ellerman 
Cc: linux-kernel@vger.kernel.org
Cc: Richard Weinberger 
Cc: James Hogan 
Cc: Andrew Morton 
Cc: Andy Lutomirski 
Cc: Markos Chandras 
Cc: Manuel Lauss 
Cc: Maciej W. Rozycki 
Patchwork: https://patchwork.linux-mips.org/patch/10792/
Signed-off-by: Ralf Baechle

MIPS: asm-offset.c: Patch up various comments refering to the old filename.

2015-07-14T14:05:49+00:00

arch/mips/tools/offset.c was renamed to arch/mips/kernel/asm-offsets.c
for v2.6.14.

Signed-off-by: Ralf Baechle

Merge branch 'exec_domain_rip_v2' of git://git.kernel.org/pub/scm/linux/kernel/git/rw/misc

2015-04-15T20:53:55+00:00

Pull exec domain removal from Richard Weinberger:
 "This series removes execution domain support from Linux.

  The idea behind exec domains was to support different ABIs.  The
  feature was never complete nor stable.  Let's rip it out and make the
  kernel signal handling code less complicated"

* 'exec_domain_rip_v2' of git://git.kernel.org/pub/scm/linux/kernel/git/rw/misc: (27 commits)
  arm64: Removed unused variable
  sparc: Fix execution domain removal
  Remove rest of exec domains.
  arch: Remove exec_domain from remaining archs
  arc: Remove signal translation and exec_domain
  xtensa: Remove signal translation and exec_domain
  xtensa: Autogenerate offsets in struct thread_info
  x86: Remove signal translation and exec_domain
  unicore32: Remove signal translation and exec_domain
  um: Remove signal translation and exec_domain
  tile: Remove signal translation and exec_domain
  sparc: Remove signal translation and exec_domain
  sh: Remove signal translation and exec_domain
  s390: Remove signal translation and exec_domain
  mn10300: Remove signal translation and exec_domain
  microblaze: Remove signal translation and exec_domain
  m68k: Remove signal translation and exec_domain
  m32r: Remove signal translation and exec_domain
  m32r: Autogenerate offsets in struct thread_info
  frv: Remove signal translation and exec_domain
  ...

arch: Remove exec_domain from remaining archs

2015-04-12T19:03:30+00:00

Signed-off-by: Richard Weinberger