From 4c17d6acda2bb0d50e318896a5e0239a1c9e4d68 Mon Sep 17 00:00:00 2001 From: David Gibson Date: Mon, 11 Jul 2016 01:38:11 +0200 Subject: [PATCH 04/27] vmstate: Define VARRAY with VMS_ALLOC RH-Author: David Gibson Message-id: <1468201103-4990-5-git-send-email-dgibson@redhat.com> Patchwork-id: 71091 O-Subject: [RHEL7.3 qemu-kvm-rhev PATCHv2 04/16] vmstate: Define VARRAY with VMS_ALLOC Bugzilla: 1213667 RH-Acked-by: Miroslav Rezanina RH-Acked-by: Laurent Vivier RH-Acked-by: Thomas Huth From: Alexey Kardashevskiy This allows dynamic allocation for migrating arrays. Already existing VMSTATE_VARRAY_UINT32 requires an array to be pre-allocated, however there are cases when the size is not known in advance and there is no real need to enforce it. This defines another variant of VMSTATE_VARRAY_UINT32 with WMS_ALLOC flag which tells the receiving side to allocate memory for the array before receiving the data. The first user of it is a dynamic DMA window which existence and size are totally dynamic. Signed-off-by: Alexey Kardashevskiy Reviewed-by: David Gibson Reviewed-by: Thomas Huth Signed-off-by: David Gibson (cherry picked from commit 705124ea6dca3ebfa13afddac9ce9475caf981a6) Bugzilla: https://bugzilla.redhat.com/show_bug.cgi?id=1213667 Signed-off-by: David Gibson Signed-off-by: Miroslav Rezanina --- include/migration/vmstate.h | 10 ++++++++++ 1 file changed, 10 insertions(+) diff --git a/include/migration/vmstate.h b/include/migration/vmstate.h index 84ee355..1622638 100644 --- a/include/migration/vmstate.h +++ b/include/migration/vmstate.h @@ -386,6 +386,16 @@ extern const VMStateInfo vmstate_info_bitmap; .offset = vmstate_offset_pointer(_state, _field, _type), \ } +#define VMSTATE_VARRAY_UINT32_ALLOC(_field, _state, _field_num, _version, _info, _type) {\ + .name = (stringify(_field)), \ + .version_id = (_version), \ + .num_offset = vmstate_offset_value(_state, _field_num, uint32_t),\ + .info = &(_info), \ + .size = sizeof(_type), \ + .flags = VMS_VARRAY_UINT32|VMS_POINTER|VMS_ALLOC, \ + .offset = vmstate_offset_pointer(_state, _field, _type), \ +} + #define VMSTATE_VARRAY_UINT16_UNSAFE(_field, _state, _field_num, _version, _info, _type) {\ .name = (stringify(_field)), \ .version_id = (_version), \ -- 1.8.3.1