HMP pull

New gva2gpa command
 delvm now uses hmp_handle_error so gets Error: prefix in messages
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Merge remote-tracking branch 'remotes/dgilbert/tags/pull-hmp-20190501' into staging

HMP pull

New gva2gpa command
delvm now uses hmp_handle_error so gets Error: prefix in messages

# gpg: Signature made Wed 01 May 2019 11:57:43 BST
# gpg:                using RSA key 45F5C71B4A0CB7FB977A9FA90516331EBC5BFDE7
# gpg: Good signature from "Dr. David Alan Gilbert (RH2) <dgilbert@redhat.com>" [full]
# Primary key fingerprint: 45F5 C71B 4A0C B7FB 977A  9FA9 0516 331E BC5B FDE7

* remotes/dgilbert/tags/pull-hmp-20190501:
  hmp: gva2gpa debug command
  hmp: delvm: use hmp_handle_error

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>

hmp-commands.hx

@@ -585,6 +585,21 @@ STEXI
 @findex gpa2hpa
 Print the host physical address at which the guest's physical address @var{addr}
 is mapped.
+ETEXI
+
+    {
+        .name       = "gva2gpa",
+        .args_type  = "addr:l",
+        .params     = "addr",
+        .help       = "print the guest physical address corresponding to a guest virtual address",
+        .cmd        = hmp_gva2gpa,
+    },
+
+STEXI
+@item gva2gpa @var{addr}
+@findex gva2gpa
+Print the guest physical address at which the guest's virtual address @var{addr}
+is mapped based on the mapping for the current CPU.
 ETEXI
 
     {

hmp.c

@@ -1480,10 +1480,11 @@ void hmp_delvm(Monitor *mon, const QDict *qdict)
     const char *name = qdict_get_str(qdict, "name");
 
     if (bdrv_all_delete_snapshot(name, &bs, &err) < 0) {
-        error_reportf_err(err,
+        error_prepend(&err,
-                          "Error while deleting snapshot on device '%s': ",
+                      "deleting snapshot on device '%s': ",
-                          bdrv_get_device_name(bs));
+                      bdrv_get_device_name(bs));
     }
+    hmp_handle_error(mon, &err);
 }
 
 void hmp_info_snapshots(Monitor *mon, const QDict *qdict)

monitor.c

@@ -1673,6 +1673,28 @@ static void hmp_gpa2hva(Monitor *mon, const QDict *qdict)
     memory_region_unref(mr);
 }
 
+static void hmp_gva2gpa(Monitor *mon, const QDict *qdict)
+{
+    target_ulong addr = qdict_get_int(qdict, "addr");
+    MemTxAttrs attrs;
+    CPUState *cs = mon_get_cpu();
+    hwaddr gpa;
+
+    if (!cs) {
+        monitor_printf(mon, "No cpu\n");
+        return;
+    }
+
+    gpa  = cpu_get_phys_page_attrs_debug(mon_get_cpu(),
+                                         addr & TARGET_PAGE_MASK, &attrs);
+    if (gpa == -1) {
+        monitor_printf(mon, "Unmapped\n");
+    } else {
+        monitor_printf(mon, "gpa: %#" HWADDR_PRIx "\n",
+                       gpa + (addr & ~TARGET_PAGE_MASK));
+    }
+}
+
 #ifdef CONFIG_LINUX
 static uint64_t vtop(void *ptr, Error **errp)
 {

tests/test-hmp.c

@@ -39,6 +39,7 @@ static const char *hmp_cmds[] = {
     "dump-guest-memory /dev/null 0 4096",
     "dump-guest-memory /dev/null",
     "gdbserver",
+    "gva2gpa 0",
     "hostfwd_add tcp::43210-:43210",
     "hostfwd_remove tcp::43210-:43210",
     "i /w 0",