From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:33895) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1b7o0U-0005dl-Oz for qemu-devel@nongnu.org; Tue, 31 May 2016 14:03:11 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1b7o0R-0000w2-IK for qemu-devel@nongnu.org; Tue, 31 May 2016 14:03:10 -0400 Received: from e17.ny.us.ibm.com ([129.33.205.207]:34425) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1b7o0R-0000vL-Dk for qemu-devel@nongnu.org; Tue, 31 May 2016 14:03:07 -0400 Received: from localhost by e17.ny.us.ibm.com with IBM ESMTP SMTP Gateway: Authorized Use Only! Violators will be prosecuted for from ; Tue, 31 May 2016 14:03:06 -0400 From: Jianjun Duan Date: Tue, 31 May 2016 11:02:40 -0700 Message-Id: <1464717764-9040-3-git-send-email-duanj@linux.vnet.ibm.com> In-Reply-To: <1464717764-9040-1-git-send-email-duanj@linux.vnet.ibm.com> References: <1464717764-9040-1-git-send-email-duanj@linux.vnet.ibm.com> Subject: [Qemu-devel] [QEMU RFC PATCH v3 2/6] vmstate: Define VARRAY with VMS_ALLOC List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: qemu-devel@nongnu.org Cc: qemu-ppc@nongnu.org, duanj@linux.vnet.ibm.com, dmitry@daynix.com, peter.maydell@linaro.org, kraxel@redhat.com, mst@redhat.com, david@gibson.dropbear.id.au, pbonzini@redhat.com, veroniabahaa@gmail.com, quintela@redhat.com, amit.shah@redhat.com, mreitz@redhat.com, kwolf@redhat.com, rth@twiddle.net, aurelien@aurel32.net, leon.alrae@imgtec.com, blauwirbel@gmail.com, mark.cave-ayland@ilande.co.uk, mdroth@linux.vnet.ibm.com 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: Jianjun Duan --- include/migration/vmstate.h | 10 ++++++++++ 1 file changed, 10 insertions(+) diff --git a/include/migration/vmstate.h b/include/migration/vmstate.h index 30ecc44..6c65811 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), \ -- 1.9.1