Author: Max Asbock <masbock@xxxxxxxxxxxxxxxxxx>
Add command x-gpa2hva to translate guest physical address to host
virtual address. Because gpa to hva translation is not consistent, so
this command is only used for debugging.
The x-gpa2hva command provides one step in a chain of translations from
guest virtual to guest physical to host virtual to host physical. Host
physical is then used to inject a machine check error. As a
consequence the HWPOISON code on the host and the MCE injection code
in qemu-kvm are exercised.
v3:
- Rename to x-gpa2hva
- Remove QMP support, because gpa2hva is not consistent
v2:
- Add QMP support
Signed-off-by: Max Asbock <masbock@xxxxxxxxxxxxxxxxxx>
Signed-off-by: Jiajia Zheng <jiajia.zheng@xxxxxxxxx>
Signed-off-by: Huang Ying <ying.huang@xxxxxxxxx>
---
hmp-commands.hx | 15 +++++++++++++++
monitor.c | 22 ++++++++++++++++++++++
2 files changed, 37 insertions(+)
--- a/monitor.c
+++ b/monitor.c
@@ -2272,6 +2272,28 @@ static void do_inject_mce(Monitor *mon,
}
#endif
+static void do_gpa2hva_print(Monitor *mon, const QObject *data)
+{
+ QInt *qint;
+
+ qint = qobject_to_qint(data);
+ monitor_printf(mon, "0x%lx\n", (unsigned long)qint->value);
+}
+
+static int do_gpa2hva(Monitor *mon, const QDict *qdict, QObject **ret_data)
+{
+ target_phys_addr_t paddr;
+ target_phys_addr_t size = TARGET_PAGE_SIZE;
+ void *vaddr;
+
+ paddr = qdict_get_int(qdict, "addr");
+ vaddr = cpu_physical_memory_map(paddr, &size, 0);
+ cpu_physical_memory_unmap(vaddr, size, 0, 0);
+ *ret_data = qobject_from_jsonf("%ld", (unsigned long)vaddr);
+
+ return 0;
+}
+
static int do_getfd(Monitor *mon, const QDict *qdict, QObject **ret_data)
{
const char *fdname = qdict_get_str(qdict, "fdname");
--- a/hmp-commands.hx
+++ b/hmp-commands.hx
@@ -293,6 +293,21 @@ Start gdbserver session (default @var{po
ETEXI
{
+ .name = "x-gpa2hva",
+ .args_type = "fmt:/,addr:l",
+ .params = "/fmt addr",
+ .help = "translate guest physical 'addr' to host virtual address, only for debugging",
+ .user_print = do_gpa2hva_print,
+ .mhandler.cmd_new = do_gpa2hva,
+ },
+
+STEXI
+@item x-gpa2hva @var{addr}
+@findex x-gpa2hva
+Translate guest physical @var{addr} to host virtual address, only for debugging.
+ETEXI
+
+ {
.name = "x",
.args_type = "fmt:/,addr:l",
.params = "/fmt addr",
--
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