MIPS: KVM: Check MSA presence at uasm time

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Check for presence of MSA at uasm assembly time rather than at runtime
in the generated KVM host entry code. This optimises the guest exit path
by eliminating the MSA code entirely if not present, and eliminating the
read of Config3.MSAP and conditional branch if MSA is present.

Signed-off-by: James Hogan <james.hogan@imgtec.com>
Cc: Paolo Bonzini <pbonzini@redhat.com>
Cc: Radim KrÄmář <rkrcmar@redhat.com>
Cc: Ralf Baechle <ralf@linux-mips.org>
Cc: linux-mips@linux-mips.org
Cc: kvm@vger.kernel.org
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

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James Hogan 2016-06-23 17:34:43 +01:00 • committed by Paolo Bonzini

parent d37f4038d1

commit 38ea7a715d

1 changed files with 15 additions and 20 deletions

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arch/mips/kvm/entry.c

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