[Xen-devel] [PATCH 8/8] libxc: add API for kexec hypercall

[Ian Campbell]

On Thu, 2013-02-21 at 17:48 +0000, David Vrabel wrote:
> From: David Vrabel <david.vrabel at citrix.com>
> 
> Add xc_kexec_exec(), xc_kexec_get_ranges(), xc_kexec_load(), and
> xc_kexec_unload().  The load and unload calls require the v2 load and
> unload ops.

Looks good, few nits below, but

Acked-by: Ian Campbell <ian.campbell at citrix.com>

> +/*
> + * Find the machine address and size of certain memory areas.
> + *
> + *   KEXEC_RANGE_MA_CRASH       crash area
> + *   KEXEC_RANGE_MA_XEN         Xen itself
> + *   KEXEC_RANGE_MA_CPU         CPU note for CPU number 'nr'
> + *   KEXEC_RANGE_MA_XENHEAP     xenheap
> + *   KEXEC_RANGE_MA_EFI_MEMMAP  EFI Memory Map
> + *   KEXEC_RANGE_MA_VMCOREINFO  vmcoreinfo

I expect there is a canonical list of these somewhere, can we get a
pointer to it here?

> + *
> + * Fails with:
> + *   EINVAL if the range or CPU number isn't valid.
> + */
> +int xc_kexec_get_range(xc_interface *xch, int range,  int nr,
> +                       uint64_t *size, uint64_t *start);
> +
> +/*
> + * Load a kexec image into memory.
> + *
> + * The image may be of type KEXEC_TYPE_DEFAULT (executed on request)
> + * or KEXEC_TYPE_CRASH (executed on a crash).
> + *
> + * The image architecture may be a 32-bit variant of the hypervisor
> + * architecture (e.g, EM_386 on a x86-64 hypervisor).

arch is an ELF arch? Worth mentioning explicitly I think.

Ian