From: James Hogan Date: Thu, 23 Jun 2016 16:34:44 +0000 (+0100) Subject: MIPS: KVM: Drop redundant restore of DDATA_LO X-Git-Url: http://git.lede-project.org./?a=commitdiff_plain;h=025014e3fb8f6afab92d3050c3423e2b1ffcbc84;p=openwrt%2Fstaging%2Fblogic.git MIPS: KVM: Drop redundant restore of DDATA_LO 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 Cc: Paolo Bonzini Cc: Radim KrÄmář Cc: Ralf Baechle Cc: linux-mips@linux-mips.org Cc: kvm@vger.kernel.org Signed-off-by: Paolo Bonzini --- diff --git a/arch/mips/kvm/entry.c b/arch/mips/kvm/entry.c index 53e1e576d18a..6395bfa7e542 100644 --- a/arch/mips/kvm/entry.c +++ b/arch/mips/kvm/entry.c @@ -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