hmp: gva2gpa debug command

Add a gva2gpa command purely for debug which performs address translation on the gva, the existing gpa2hva command can then also be used to find it in the qemu userspace; e.g. (qemu) info registers .... RSP=ffffffff81c03e98 .... (qemu) gva2gpa 0xffffffff81c03e98 gpa: 0x1c03e98 (qemu) gpa2hva 0x1c03e98 Host virtual address for 0x1c03e98 (pc.ram) is 0x7f0599a03e98 (qemu) x/10x 0xffffffff81c03e98 ffffffff81c03e98: 0x81c03eb8 0xffffffff 0x8101ea3f 0xffffffff ffffffff81c03ea8: 0x81d27b00 0xffffffff 0x00000000 0x00000000 ffffffff81c03eb8: 0x81c03ec8 0xffffffff gdb -p ...qemu... (gdb) x/10x 0x7f0599a03e98 0x7f0599a03e98: 0x81c03eb8 0xffffffff 0x8101ea3f 0xffffffff 0x7f0599a03ea8: 0x81d27b00 0xffffffff 0x00000000 0x00000000 0x7f0599a03eb8: 0x81c03ec8 0xffffffff Signed-off-by: Dr. David Alan Gilbert <[email protected]> Message-Id: <[email protected]> Reviewed-by: Stefan Hajnoczi <[email protected]> Signed-off-by: Dr. David Alan Gilbert <[email protected]>
hisilicon · May 1, 2019 · 574d969 · 574d969
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commit 574d969
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diff --git a/hmp-commands.hx b/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
 
     {

diff --git a/monitor.c b/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)
 {

diff --git a/tests/test-hmp.c b/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",