From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:37955) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1ZBvtX-0007vg-Lo for qemu-devel@nongnu.org; Sun, 05 Jul 2015 22:12:32 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1ZBvtO-0001NK-St for qemu-devel@nongnu.org; Sun, 05 Jul 2015 22:12:31 -0400 Received: from e23smtp03.au.ibm.com ([202.81.31.145]:46364) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1ZBvtO-0001Lj-AP for qemu-devel@nongnu.org; Sun, 05 Jul 2015 22:12:22 -0400 Received: from /spool/local by e23smtp03.au.ibm.com with IBM ESMTP SMTP Gateway: Authorized Use Only! Violators will be prosecuted for from ; Mon, 6 Jul 2015 12:12:18 +1000 From: Alexey Kardashevskiy Date: Mon, 6 Jul 2015 12:10:58 +1000 Message-Id: <1436148670-6592-3-git-send-email-aik@ozlabs.ru> In-Reply-To: <1436148670-6592-1-git-send-email-aik@ozlabs.ru> References: <1436148670-6592-1-git-send-email-aik@ozlabs.ru> Subject: [Qemu-devel] [PATCH qemu v10 02/14] vmstate: Define VARRAY with VMS_ALLOC List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: qemu-devel@nongnu.org Cc: Alexey Kardashevskiy , Michael Roth , Gavin Shan , Alex Williamson , qemu-ppc@nongnu.org, David Gibson 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 --- include/migration/vmstate.h | 10 ++++++++++ 1 file changed, 10 insertions(+) diff --git a/include/migration/vmstate.h b/include/migration/vmstate.h index 0695d7c..5881d9f 100644 --- a/include/migration/vmstate.h +++ b/include/migration/vmstate.h @@ -295,6 +295,16 @@ 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), \ -- 2.4.0.rc3.8.gfb3e7d5