MIPS: KVM: Add FP exception handling

Browse source

Add guest exception handling for floating point exceptions and
coprocessor 1 unusable exceptions.

Floating point exceptions from the guest need passing to the guest
kernel, so for these a guest FPE is emulated.

Also, coprocessor 1 unusable exceptions are normally passed straight
through to the guest (because no guest FPU was supported), but the
hypervisor can now handle them if the guest has its FPU enabled by
restoring the guest FPU context and enabling the FPU.

Signed-off-by: James Hogan <james.hogan@imgtec.com>
Cc: Paolo Bonzini <pbonzini@redhat.com>
Cc: Paul Burton <paul.burton@imgtec.com>
Cc: Ralf Baechle <ralf@linux-mips.org>
Cc: Gleb Natapov <gleb@kernel.org>
Cc: linux-mips@linux-mips.org
Cc: kvm@vger.kernel.org

...

This commit is contained in:

James Hogan 2015-02-06 10:56:27 +00:00

parent 6cdc65e31d

commit 1c0cd66adb

5 changed files with 88 additions and 3 deletions

Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL

Download patch file Download diff file Expand all files Collapse all files

8

arch/mips/include/asm/kvm_host.h

View file

36

arch/mips/kvm/emulate.c

View file

7

arch/mips/kvm/mips.c

View file

1

arch/mips/kvm/stats.c

View file

39

arch/mips/kvm/trap_emul.c

View file