linux-stable.git/arch/powerpc/kernel/process.c, branch v3.13

Merge tag 'signed-for-3.13' of git://github.com/agraf/linux-2.6 into kvm-master

2013-12-20T18:13:58+00:00

Patch queue for 3.13 - 2013-12-18

This fixes some grave issues we've only found after 3.13-rc1:

  - Make the modularized HV/PR book3s kvm work well as modules
  - Fix some race conditions
  - Fix compilation with certain compilers (booke)
  - Fix THP for book3s_hv
  - Fix preemption for book3s_pr

Alexander Graf (4):
      KVM: PPC: Book3S: PR: Don't clobber our exit handler id
      KVM: PPC: Book3S: PR: Export kvmppc_copy_to|from_svcpu
      KVM: PPC: Book3S: PR: Make svcpu -> vcpu store preempt savvy
      KVM: PPC: Book3S: PR: Enable interrupts earlier

Aneesh Kumar K.V (1):
      powerpc: book3s: kvm: Don't abuse host r2 in exit path

Paul Mackerras (5):
      KVM: PPC: Book3S HV: Fix physical address calculations
      KVM: PPC: Book3S HV: Refine barriers in guest entry/exit
      KVM: PPC: Book3S HV: Make tbacct_lock irq-safe
      KVM: PPC: Book3S HV: Take SRCU read lock around kvm_read_guest() call
      KVM: PPC: Book3S HV: Don't drop low-order page address bits

Scott Wood (1):
      powerpc/kvm/booke: Fix build break due to stack frame size warning

pingfan liu (1):
      powerpc: kvm: fix rare but potential deadlock scene

powerpc/kvm/booke: Fix build break due to stack frame size warning

2013-12-10T23:12:44+00:00

Commit ce11e48b7fdd256ec68b932a89b397a790566031 ("KVM: PPC: E500: Add
userspace debug stub support") added "struct thread_struct" to the
stack of kvmppc_vcpu_run().  thread_struct is 1152 bytes on my build,
compared to 48 bytes for the recently-introduced "struct debug_reg".
Use the latter instead.

This fixes the following error:

cc1: warnings being treated as errors
arch/powerpc/kvm/booke.c: In function 'kvmppc_vcpu_run':
arch/powerpc/kvm/booke.c:760:1: error: the frame size of 1424 bytes is larger than 1024 bytes
make[2]: *** [arch/powerpc/kvm/booke.o] Error 1
make[1]: *** [arch/powerpc/kvm] Error 2
make[1]: *** Waiting for unfinished jobs....

Signed-off-by: Scott Wood 
Signed-off-by: Alexander Graf

Merge branch 'merge' of git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc

2013-11-22T16:07:11+00:00

Pull third set of powerpc updates from Benjamin Herrenschmidt:
 "This is a small collection of random bug fixes and a few improvements
  of Oops output which I deemed valuable enough to include as well.

  The fixes are essentially recent build breakage and regressions, and a
  couple of older bugs such as the DTL log duplication, the EEH issue
  with PCI_COMMAND_MASTER and the problem with small contexts passed to
  get/set_context with VSX enabled"

* 'merge' of git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc:
  powerpc/signals: Mark VSX not saved with small contexts
  powerpc/pseries: Fix SMP=n build of rng.c
  powerpc: Make cpu_to_chip_id() available when SMP=n
  powerpc/vio: Fix a dma_mask issue of vio
  powerpc: booke: Fix build failures
  powerpc: ppc64 address space capped at 32TB, mmap randomisation disabled
  powerpc: Only print PACATMSCRATCH in oops when TM is active
  powerpc/pseries: Duplicate dtl entries sometimes sent to userspace
  powerpc: Remove a few lines of oops output
  powerpc: Print DAR and DSISR on machine check oopses
  powerpc: Fix __get_user_pages_fast() irq handling
  powerpc/eeh: More accurate log
  powerpc/eeh: Enable PCI_COMMAND_MASTER for PCI bridges

powerpc: Only print PACATMSCRATCH in oops when TM is active

2013-11-20T23:33:40+00:00

If TM is not active there is no need to print PACATMSCRATCH
so we can save ourselves a line.

Signed-off-by: Anton Blanchard 
Acked-by: Michael Neuling 
Signed-off-by: Benjamin Herrenschmidt

powerpc: Remove a few lines of oops output

2013-11-20T23:33:39+00:00

We waste quite a few lines in our oops output:

...
MSR: 8000000000009032   CR: 28044024  XER: 00000000
SOFTE: 0
CFAR: 0000000000009088
DAR: 000000000000001c, DSISR: 40000000

GPR00: c0000000000c74f0 c00000037cc1b010 c000000000d2bb30 0000000000000000
...

We can do a better job here and remove 3 lines:

MSR: 8000000000009032   CR: 28044024  XER: 00000000
CFAR: 0000000000009088 DAR: 0000000000000010, DSISR: 40000000 SOFTE: 1
GPR00: c0000000000e3d10 c00000037cc2fda0 c000000000d2c3a8 0000000000000001

Also move PACATMSCRATCH up, it doesn't really belong in the stack
trace section.

Signed-off-by: Anton Blanchard 
Signed-off-by: Benjamin Herrenschmidt

powerpc: Print DAR and DSISR on machine check oopses

2013-11-20T23:33:38+00:00

Machine check exceptions set DAR and DSISR, so print them in our
oops output.

Signed-off-by: Anton Blanchard 
Signed-off-by: Benjamin Herrenschmidt

powerpc: ELF2 binaries launched directly.

2013-11-20T22:19:19+00:00

No function descriptor, but we set r12 up and set TIF_RESTOREALL as it
normally isn't restored on return from syscall.

Signed-off-by: Rusty Russell 
Signed-off-by: Anton Blanchard 
Signed-off-by: Benjamin Herrenschmidt

powerpc/tm: Remove interrupt disable in __switch_to()

2013-10-31T05:19:17+00:00

We currently turn IRQs off in __switch_to(0 but this is unnecessary as it's
already disabled in the caller.

This removes the IRQ disable but adds a check to make sure it is really off
in case this changes in future.

Signed-off-by: Michael Neuling 
Signed-off-by: Benjamin Herrenschmidt

powerpc: export debug registers save function for KVM

2013-10-18T23:46:18+00:00

KVM need this function when switching from vcpu to user-space
thread. My subsequent patch will use this function.

Signed-off-by: Bharat Bhushan 
Acked-by: Michael Neuling 
Signed-off-by: Scott Wood

powerpc: move debug registers in a structure

2013-10-18T23:44:49+00:00

This way we can use same data type struct with KVM and
also help in using other debug related function.

Signed-off-by: Bharat Bhushan 
Acked-by: Michael Neuling 
[scottwood@freescale.com: removed obvious debug_reg comment]
Signed-off-by: Scott Wood