Re: [PATCH v2 5/5] arm64/xen: introduce CONFIG_XEN and hypercall.Son ARM64

From: Catalin Marinas
Date: Mon Jun 03 2013 - 12:26:30 EST

On Mon, Jun 03, 2013 at 04:33:44PM +0100, Stefano Stabellini wrote:
> --- /dev/null
> +++ b/arch/arm64/xen/hypercall.S
> +/*
> + * The Xen hypercall calling convention is very similar to the ARM AEBI
> + * procedure calling convention: the first paramter is passed in x0, the
> + * second in x1, the third in x2 and the fourth in x3. Considering that
> + * Xen hypercalls have 5 arguments at most, the fifth paramter is passed
> + * in rx, differently from the procedure calling convention of using the
> + * stack for that case.

You may want to use the AArch64 ABI here where parameters are passed in
x0-x7, return in x0.

BTW, I think it's missing a MAINTAINERS file update.

Otherwise, the series looks good. How do you plan to upstream this?

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