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68381b2b00
We are doing an unnecessary stack push/pop operation when restoring the guest registers x0-x18 in __guest_enter(). This patch saves the two instructions by using x18 as a base register. No need to store the vcpu context pointer in stack because it is redundant, the same information is available in tpidr_el2. The function __guest_exit() calling convention is slightly modified, caller only pushes the regs x0-x1 to stack instead of regs x0-x3. Signed-off-by: Shanker Donthineni <shankerd@codeaurora.org> Reviewed-by: Christoffer Dall <christoffer.dall@linaro.org> Signed-off-by: Christoffer Dall <christoffer.dall@linaro.org>