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Revision 0b250250b7e7298e0001faf76015da4b03b6b1b3 authored by Prasad Singamsetty on 14 November 2017, 23:13:50 UTC, committed by Michael Roth on 21 June 2018, 01:45:05 UTC 
intel-iommu: Extend address width to 48 bits
 
The current implementation of Intel IOMMU code only supports 39 bits
iova address width. This patch provides a new parameter (x-aw-bits)
for intel-iommu to extend its address width to 48 bits but keeping the
default the same (39 bits). The reason for not changing the default
is to avoid potential compatibility problems with live migration of
intel-iommu enabled QEMU guest. The only valid values for 'x-aw-bits'
parameter are 39 and 48.

After enabling larger address width (48), we should be able to map
larger iova addresses in the guest. For example, a QEMU guest that
is configured with large memory ( >=1TB ). To check whether 48 bits
aw is enabled, we can grep in the guest dmesg output with line:
"DMAR: Host address width 48".

Signed-off-by: Prasad Singamsetty <prasad.singamsety@oracle.com>
Reviewed-by: Peter Xu <peterx@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
(cherry picked from commit 37f51384ae05bd50f83308339dbffa3e78404874)
Signed-off-by: Michael Roth <mdroth@linux.vnet.ibm.com>
1 parent d45364e
Raw File
colo.h 
/*
 * COarse-grain LOck-stepping Virtual Machines for Non-stop Service (COLO)
 * (a.k.a. Fault Tolerance or Continuous Replication)
 *
 * Copyright (c) 2016 HUAWEI TECHNOLOGIES CO., LTD.
 * Copyright (c) 2016 FUJITSU LIMITED
 * Copyright (c) 2016 Intel Corporation
 *
 * Author: Zhang Chen <zhangchen.fnst@cn.fujitsu.com>
 *
 * This work is licensed under the terms of the GNU GPL, version 2 or
 * later.  See the COPYING file in the top-level directory.
 */

#ifndef QEMU_COLO_PROXY_H
#define QEMU_COLO_PROXY_H

#include "slirp/slirp.h"
#include "qemu/jhash.h"
#include "qemu/timer.h"

#define HASHTABLE_MAX_SIZE 16384

#ifndef IPPROTO_DCCP
#define IPPROTO_DCCP 33
#endif

#ifndef IPPROTO_SCTP
#define IPPROTO_SCTP 132
#endif

#ifndef IPPROTO_UDPLITE
#define IPPROTO_UDPLITE 136
#endif

typedef struct Packet {
    void *data;
    union {
        uint8_t *network_header;
        struct ip *ip;
    };
    uint8_t *transport_header;
    int size;
    /* Time of packet creation, in wall clock ms */
    int64_t creation_ms;
    /* Get vnet_hdr_len from filter */
    uint32_t vnet_hdr_len;
} Packet;

typedef struct ConnectionKey {
    /* (src, dst) must be grouped, in the same way than in IP header */
    struct in_addr src;
    struct in_addr dst;
    uint16_t src_port;
    uint16_t dst_port;
    uint8_t ip_proto;
} QEMU_PACKED ConnectionKey;

typedef struct Connection {
    /* connection primary send queue: element type: Packet */
    GQueue primary_list;
    /* connection secondary send queue: element type: Packet */
    GQueue secondary_list;
    /* flag to enqueue unprocessed_connections */
    bool processing;
    uint8_t ip_proto;
    /* offset = secondary_seq - primary_seq */
    tcp_seq  offset;
    /*
     * we use this flag update offset func
     * run once in independent tcp connection
     */
    int syn_flag;
} Connection;

uint32_t connection_key_hash(const void *opaque);
int connection_key_equal(const void *opaque1, const void *opaque2);
int parse_packet_early(Packet *pkt);
void extract_ip_and_port(uint32_t tmp_ports, ConnectionKey *key, Packet *pkt);
void fill_connection_key(Packet *pkt, ConnectionKey *key);
void reverse_connection_key(ConnectionKey *key);
Connection *connection_new(ConnectionKey *key);
void connection_destroy(void *opaque);
Connection *connection_get(GHashTable *connection_track_table,
                           ConnectionKey *key,
                           GQueue *conn_list);
void connection_hashtable_reset(GHashTable *connection_track_table);
Packet *packet_new(const void *data, int size, int vnet_hdr_len);
void packet_destroy(void *opaque, void *user_data);

#endif /* QEMU_COLO_PROXY_H */
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