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Re: [Qemu-devel] [PATCH 4/6] savevm: Add VMSTATE_STRUCT_VARRAY_POINTER_U
From: |
David Gibson |
Subject: |
Re: [Qemu-devel] [PATCH 4/6] savevm: Add VMSTATE_STRUCT_VARRAY_POINTER_UINT32 |
Date: |
Fri, 15 Mar 2013 16:36:39 +1100 |
User-agent: |
Mutt/1.5.21 (2010-09-15) |
On Thu, Mar 14, 2013 at 01:40:37PM +0100, Juan Quintela wrote:
> David Gibson <address@hidden> wrote:
> > Currently the savevm code contains a VMSTATE_STRUCT_VARRAY_POINTER_INT32
> > helper (a variably sized array with the number of elements in an int32_t),
> > but not VMSTATE_STRUCT_VARRAY_POINTER_UINT32 (... with the number of
> > elements in a uint32_t). This patch (trivially) fixes the deficiency.
> >
> > Signed-off-by: David Gibson <address@hidden>
> > ---
> > include/migration/vmstate.h | 10 ++++++++++
> > 1 file changed, 10 insertions(+)
> >
> > diff --git a/include/migration/vmstate.h b/include/migration/vmstate.h
> > index f0a6374..fe39cd9 100644
> > --- a/include/migration/vmstate.h
> > +++ b/include/migration/vmstate.h
> > @@ -339,6 +339,16 @@ extern const VMStateInfo vmstate_info_bitmap;
> > .offset = vmstate_offset_pointer(_state, _field, _type), \
> > }
> >
> > +#define VMSTATE_STRUCT_VARRAY_POINTER_UINT32(_field, _state, _field_num,
> > _vmsd, _type) { \
> > + .name = (stringify(_field)), \
> > + .version_id = 0, \
> > + .num_offset = vmstate_offset_value(_state, _field_num, uint32_t),\
> > + .size = sizeof(_type), \
> > + .vmsd = &(_vmsd), \
> > + .flags = VMS_POINTER | VMS_VARRAY_INT32 | VMS_STRUCT, \
>
> We are overridding VMS_VARRAYS_INT32 here, but if we have so many
> elements in the array, we have other problems to fix O:-)
More to the point, negative numbers of elements make no sense, so in
practice the only sensible interpretation of the field is unsigned
anyway.
--
David Gibson | I'll have my music baroque, and my code
david AT gibson.dropbear.id.au | minimalist, thank you. NOT _the_ _other_
| _way_ _around_!
http://www.ozlabs.org/~dgibson
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- [Qemu-devel] [0/6] Simple extensions to VMStateDescription features, David Gibson, 2013/03/11
- [Qemu-devel] [PATCH 3/6] savevm: Add VMSTATE_FLOAT64 helpers, David Gibson, 2013/03/11
- [Qemu-devel] [PATCH 2/6] savevm: Add VMSTATE_UINTTL_EQUAL helper, David Gibson, 2013/03/11
- [Qemu-devel] [PATCH 5/6] savevm: Fix bugs in the VMSTATE_VBUFFER_MULTIPLY definition, David Gibson, 2013/03/11
- [Qemu-devel] [PATCH 4/6] savevm: Add VMSTATE_STRUCT_VARRAY_POINTER_UINT32, David Gibson, 2013/03/11
- [Qemu-devel] [PATCH 1/6] savevm: Add VMSTATE_UINT64_EQUAL helpers, David Gibson, 2013/03/11
- [Qemu-devel] [PATCH 6/6] savevm: Implement VMS_DIVIDE flag, David Gibson, 2013/03/11
- Re: [Qemu-devel] [0/6] Simple extensions to VMStateDescription features, Juan Quintela, 2013/03/14