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3 Commits

Author SHA1 Message Date
Andreas Schwab
05d77ac90c powerpc: Remove fpscr use from [kvm_]cvt_{fd,df} 
Neither lfs nor stfs touch the fpscr, so remove the restore/save of it
around them.

Signed-off-by: Andreas Schwab <schwab@linux-m68k.org>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
 2010-09-02 14:07:32 +10:00
Andreas Schwab
49f6be8ea1 KVM: PPC: elide struct thread_struct instances from stack 
Instead of instantiating a whole thread_struct on the stack use only the
required parts of it.

Signed-off-by: Andreas Schwab <schwab@linux-m68k.org>
Tested-by: Alexander Graf <agraf@suse.de>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
 2010-08-01 10:39:24 +03:00
Alexander Graf
963cf3dc63 KVM: PPC: Add helpers to call FPU instructions 
To emulate paired single instructions, we need to be able to call FPU
operations from within the kernel. Since we don't want gcc to spill
arbitrary FPU code everywhere, we tell it to use a soft fpu.

Since we know we can really call the FPU in safe areas, let's also add
some calls that we can later use to actually execute real world FPU
operations on the host's FPU.

Signed-off-by: Alexander Graf <agraf@suse.de>
Signed-off-by: Avi Kivity <avi@redhat.com>
 2010-04-25 12:35:15 +03:00