LoongArch: KVM: Remove unnecessary CSR register saving during enter guest
Some CSR registers like CRMD/PRMD are saved during enter VM mode now.
However they are not restored for actual use, so saving for these CSR
registers can be removed.
Reviewed-by: Tianrui Zhao <zhaotianrui@loongson.cn>
Signed-off-by: Bibo Mao <maobibo@loongson.cn>
Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>
diff --git a/arch/loongarch/kvm/switch.S b/arch/loongarch/kvm/switch.S
index ba97650..3634431 100644
--- a/arch/loongarch/kvm/switch.S
+++ b/arch/loongarch/kvm/switch.S
@@ -213,12 +213,6 @@
/* Save host GPRs */
kvm_save_host_gpr a2
- /* Save host CRMD, PRMD to stack */
- csrrd a3, LOONGARCH_CSR_CRMD
- st.d a3, a2, PT_CRMD
- csrrd a3, LOONGARCH_CSR_PRMD
- st.d a3, a2, PT_PRMD
-
addi.d a2, a1, KVM_VCPU_ARCH
st.d sp, a2, KVM_ARCH_HSP
st.d tp, a2, KVM_ARCH_HTP
