[Xen-devel] [PATCH] kexec: framework and i386 (Take XIV)

[Horms <horms@xxxxxxxxxxxx>]

Hi,

here is an update of the kexec/kdump patchset.

Summary:

* Up port to xen-unstable.hg-11296 (45f6ee334fcc)
  - kexec hypercall number fragment is now in xen-unstable
* Make kexec_page_to_pfn and friends need to be architecture specific
  - this abstraction is needed to support ia64
* Use kexec_page_to_pfn in machine_kexec_setup_load_arg()
  - this abstraction is needed to support ia64
* Rename do_kexec to do_kexec_op to make it consistent with other
  hypercalls
* Add ppc stubs
* Add ia64 support

Architectures:

x86_32: 

Seems to be working fine

x86_64:

Probably working fine, but I can't test this as dom0 refuses to boot for
me on xen-unstable-11388 (50aea0ec406b).  That is, even without the
kexec patches. I'm not sure what the problem is and I've devicided to
get these patches out rather and investigate later.

ia64:

This patchset also, for the first time, includes ia64 code.
Please note that this currently does _not_ work. I am actually
struggling to work out why, and would really appreaciate it
if someone could cast an eye over it.

One possible area of concern is that relocate_kernel wipes out TLB
entries. However many of the entries instated in
arch/ia64/xen/xenasm.S:ia64_new_rr7() are not wiped. In particular,
VHPT_ADDR, Shared info, and Map mapped_reg are not handled by
relocate_kernel(), and the handling of current seems to be different.

There are also problems with constants inside kexec_fake_sal_rendez.
However this function probably also suffers the same problems as
relocate_kernel. And it is easy not ro run kexec_fake_sal_rendez
by booting xen with maxcpus=1, thus avoiding calling
kexec_fake_sal_rendez, which is used in cpu shutdown.

ppc:

stubs only

Patches

   1. 51.1-kexec-generic-upstream.patch
      * Common code for all architectures,
        the basic plumbing for kexec/kdump

   2. 51.1.1-kexec-trigger_crash_dump.patch
      * xen-console trigger crash_dump
      * Depends on 1

   3. 51.2.1-kexec-x86-upstream.patch
      * Glue between 1, and 3 and 4.
      * Depends on 1

   4. 51.2.1.1-kexec-x86_32-upstream.patch
      * Kexec/kdump for x86_32
      * Depends on 3 (and 1)

   5. 51.2.31.2-kexec-x86_64-upstream.patch
      * Kexec/kdump for x86_64
      * Depends on 3 (and 1)

   6. 51.2.2-kexec-ia64-upstream.patch
      * Kexec/kdump for ia64
      * Depends 1

Discussion:

Email is always good. Also my partner in crime, Magnus Damm,
will be at Xen Summit.

-- 
Horms
  H: http://www.vergenet.net/~horms/
  W: http://www.valinux.co.jp/en/

Attachment: 51.1-kexec-generic-upstream.patch
Description: Text document

Attachment: 51.1.1-kexec-trigger_crash_dump.patch
Description: Text document

Attachment: 51.2.1-kexec-x86-upstream.patch
Description: Text document

Attachment: 51.2.1.1-kexec-x86_32-upstream.patch
Description: Text document

Attachment: 51.2.1.2-kexec-x86_64-upstream.patch
Description: Text document

Attachment: 51.2.2-kexec-ia64-upstream.patch
Description: Text document

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