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MIPS: KVM: Drop redundant restore of DDATA_LO

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On return from the exit handler to the host (without re-entering the
guest) we restore the saved value of the DDATA_LO register which we use
as a scratch register. However we've already restored it ready for
calling the exit handler so there is no need to do it again, so drop
that code.

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>
This commit is contained in:
James Hogan 2016-06-23 17:34:44 +01:00 committed by Paolo Bonzini
parent 38ea7a715d
commit 025014e3fb
1 changed files with 0 additions and 4 deletions
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4
arch/mips/kvm/entry.c
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@ -581,10 +581,6 @@ static void *kvm_mips_build_ret_to_host(void *addr)
UASM_i_LW(&p, K1, offsetof(struct kvm_vcpu_arch, host_stack), K1);
uasm_i_addiu(&p, K1, K1, -(int)sizeof(struct pt_regs));
/* Restore host DDATA_LO */
UASM_i_LW(&p, K0, offsetof(struct pt_regs, cp0_epc), K1);
uasm_i_mtc0(&p, K0, C0_DDATA_LO);
/*
* r2/v0 is the return code, shift it down by 2 (arithmetic)
* to recover the err code