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HVM-768 qemu dcmds for ram and bios

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1 parent 67c6e40 commit 0ea9d5f4c8ad687c9957a2e134dce0dbeb1c8404 @rmustacc rmustacc committed Jan 10, 2013
Showing with 132 additions and 43 deletions.
  1. +132 −43 qemu_mdb.c
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@@ -132,49 +132,49 @@ typedef struct rein_event {
typedef struct VirtIONet
{
- VirtIODevice vdev;
- uint8_t mac[ETH_ALEN];
- uint16_t status;
- VirtQueue *rx_vq;
- VirtQueue *tx_vq;
- VirtQueue *ctrl_vq;
- NICState *nic;
- QEMUTimer *tx_timer;
- QEMUBH *tx_bh;
- uint32_t tx_timeout;
- int32_t tx_burst;
- int tx_waiting;
- uint32_t has_vnet_hdr;
- uint8_t has_ufo;
- struct {
- VirtQueueElement elem;
- ssize_t len;
- } async_tx;
- int mergeable_rx_bufs;
- uint8_t promisc;
- uint8_t allmulti;
- uint8_t alluni;
- uint8_t nomulti;
- uint8_t nouni;
- uint8_t nobcast;
- uint8_t vhost_started;
- struct {
- int in_use;
- int first_multi;
- uint8_t multi_overflow;
- uint8_t uni_overflow;
- uint8_t *macs;
- } mac_table;
- uint32_t *vlans;
- DeviceState *qdev;
- QEMUTimer *rein_timer;
- uint32_t rein_timer_ticks;
- uint8_t rein_timer_act;
- uint32_t rein_ring_idx;
- rein_event_t rein_ring[REIN_RING_MAX];
- uint64_t rein_n_dead;
- uint64_t rein_n_inject;
- uint64_t rein_n_rerun;
+ VirtIODevice vdev;
+ uint8_t mac[ETH_ALEN];
+ uint16_t status;
+ VirtQueue *rx_vq;
+ VirtQueue *tx_vq;
+ VirtQueue *ctrl_vq;
+ NICState *nic;
+ QEMUTimer *tx_timer;
+ QEMUBH *tx_bh;
+ uint32_t tx_timeout;
+ int32_t tx_burst;
+ int tx_waiting;
+ uint32_t has_vnet_hdr;
+ uint8_t has_ufo;
+ struct {
+ VirtQueueElement elem;
+ ssize_t len;
+ } async_tx;
+ int mergeable_rx_bufs;
+ uint8_t promisc;
+ uint8_t allmulti;
+ uint8_t alluni;
+ uint8_t nomulti;
+ uint8_t nouni;
+ uint8_t nobcast;
+ uint8_t vhost_started;
+ struct {
+ int in_use;
+ int first_multi;
+ uint8_t multi_overflow;
+ uint8_t uni_overflow;
+ uint8_t *macs;
+ } mac_table;
+ uint32_t *vlans;
+ DeviceState *qdev;
+ QEMUTimer *rein_timer;
+ uint32_t rein_timer_ticks;
+ uint8_t rein_timer_act;
+ uint32_t rein_ring_idx;
+ rein_event_t rein_ring[REIN_RING_MAX];
+ uint64_t rein_n_dead;
+ uint64_t rein_n_inject;
+ uint64_t rein_n_rerun;
} VirtIONet;
/*
@@ -739,6 +739,90 @@ qemu_mdb_nic_reinject(uintptr_t addr, uint_t flags, int argc,
return (DCMD_OK);
}
+
+static int
+qemu_mdb_ramblock_walk_init(mdb_walk_state_t *wsp)
+{
+ GElf_Sym sym;
+ RAMList rl;
+
+ if (wsp->walk_addr != NULL) {
+ mdb_warn("qemu_ramblock does not support local walks\n");
+ return (WALK_ERR);
+ }
+
+ if (mdb_lookup_by_name("ram_list", &sym) == -1) {
+ mdb_warn("lookup_by_name failed to find ram_list");
+ return (WALK_ERR);
+ }
+
+ if (mdb_vread(&rl, sizeof (rl), sym.st_value) != sizeof (rl)) {
+ mdb_warn("failed to read ram_list");
+ return (WALK_ERR);
+ }
+
+ wsp->walk_addr = (uintptr_t)rl.blocks.lh_first;
+ if (wsp->walk_addr == NULL)
+ return (WALK_DONE);
+
+ return (WALK_NEXT);
+}
+
+static int
+qemu_mdb_ramblock_walk_step(mdb_walk_state_t *wsp)
+{
+ RAMBlock rb;
+ uintptr_t addr = wsp->walk_addr;
+
+ if (addr == NULL)
+ return (WALK_DONE);
+
+ if (mdb_vread(&rb, sizeof (rb), addr) != sizeof (rb)) {
+ mdb_warn("failed to read RAMBlock %p", addr);
+ return (WALK_ERR);
+ }
+
+ wsp->walk_addr = (uintptr_t)rb.next.le_next;
+
+ return (wsp->walk_callback(addr, &rb, wsp->walk_cbdata));
+}
+
+static int
+qemu_mdb_biosptr_cb(uintptr_t addr, const RAMBlock *rb, void *v)
+{
+ uintptr_t *res = v;
+ if (strcmp("pc.bios", rb->idstr) == 0)
+ *res = (uintptr_t)rb->host;
+
+ return (0);
+}
+
+
+static int
+qemu_mdb_biosptr(uintptr_t addr, uint_t flags, int argc,
+ const mdb_arg_t *argv)
+{
+ uintptr_t out = -1;
+
+ if (flags & DCMD_ADDRSPEC)
+ return (DCMD_USAGE);
+
+ if (argc > 1)
+ return (DCMD_USAGE);
+
+ mdb_walk("qemu_ramblock", (mdb_walk_cb_t)qemu_mdb_biosptr_cb,
+ (void *)&out);
+
+ if (out == -1) {
+ mdb_warn("failed to find pc.bios\n");
+ return (DCMD_ERR);
+ }
+
+ mdb_printf("%x\n", out);
+
+ return (DCMD_OK);
+}
+
static const mdb_dcmd_t qemu_dcmds[] = {
{ "pcidev2virtio", NULL, "translate a virtio PCI device to its "
"virtio equivalent", qemu_mdb_pcidev2virtio },
@@ -750,12 +834,17 @@ static const mdb_dcmd_t qemu_dcmds[] = {
qemu_mdb_vravail },
{ "qemu_nic_reinject", NULL, "Print all of the reinject events",
qemu_mdb_nic_reinject },
+ { "qemu_biosptr", NULL, "Spit out a pointer to the bios memory",
+ qemu_mdb_biosptr },
{ NULL }
};
static const mdb_walker_t qemu_walkers[] = {
{ "qemu_host_bus", "walk qemu PCIHostBus structures",
qemu_mdb_host_bus_init, qemu_mdb_host_bus_step, NULL },
+ { "qemu_ramblock", "walk qemu ramblock structures",
+ qemu_mdb_ramblock_walk_init, qemu_mdb_ramblock_walk_step,
+ NULL },
{ NULL }
};

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