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dm: add io port 0xF4 writing to force DM exit

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This patch addes the debugexit function to DM. If it's enabled
by DM cmdline (by add --debugexit), the guest could write a
32bit value to port 0xF4 to trigger guest shutdown.

Tracked-on: #1465
Signed-off-by: Yin Fengwei <fengwei.yin@intel.com>
Reviewed-by: Jason Chen CJ <jason.cj.chen@intel.com>
Acked-by: Yu Wang <yu1.wang@intel.com>
This commit is contained in:
Yin Fengwei
2018-10-16 10:41:53 +08:00
committed by wenlingz
parent 9f7642648b
commit 75b03bef3b
4 changed files with 109 additions and 2 deletions
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28
devicemodel/core/main.c
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@@ -84,6 +84,7 @@ bool stdio_in_use;
static int virtio_msix = 1;
static int x2apic_mode; /* default is xAPIC */
static bool debugexit_enabled;
static int strictmsr = 1;
@@ -131,7 +132,7 @@ usage(int code)
"Usage: %s [-abehuwxACHPSTWY] [-c vcpus] [-g <gdb port>] [-l <lpc>]\n"
" %*s [-m mem] [-p vcpu:hostcpu] [-s <pci>] [-U uuid] \n"
" %*s [--vsbl vsbl_file_name] [--part_info part_info_name]\n"
" %*s [--enable_trusty] <vm>\n"
" %*s [--enable_trusty] [--debugexit] <vm>\n"
" -a: local apic is in xAPIC mode (deprecated)\n"
" -A: create ACPI tables\n"
" -b: enable bvmcons\n"
@@ -160,7 +161,8 @@ usage(int code)
" --vsbl: vsbl file path\n"
" --part_info: guest partition info file path\n"
" --enable_trusty: enable trusty for guest\n"
" --ptdev_no_reset: disable reset check for ptdev\n",
" --ptdev_no_reset: disable reset check for ptdev\n"
" --debugexit: enable debug exit function\n",
progname, (int)strlen(progname), "", (int)strlen(progname), "",
(int)strlen(progname), "");
@@ -439,6 +441,9 @@ vm_init_vdevs(struct vmctx *ctx)
sci_init(ctx);
init_bvmcons();
if (debugexit_enabled)
init_debugexit();
ret = monitor_init(ctx);
if (ret < 0)
goto monitor_fail;
@@ -452,6 +457,9 @@ vm_init_vdevs(struct vmctx *ctx)
pci_fail:
monitor_close();
monitor_fail:
if (debugexit_enabled)
deinit_debugexit();
deinit_bvmcons();
vpit_deinit(ctx);
vpit_fail:
@@ -469,6 +477,10 @@ vm_deinit_vdevs(struct vmctx *ctx)
{
deinit_pci(ctx);
monitor_close();
if (debugexit_enabled)
deinit_debugexit();
deinit_bvmcons();
vpit_deinit(ctx);
vrtc_deinit(ctx);
@@ -493,6 +505,10 @@ vm_reset_vdevs(struct vmctx *ctx)
* could be assigned with different number after reset.
*/
atkbdc_deinit(ctx);
if (debugexit_enabled)
deinit_debugexit();
vpit_deinit(ctx);
vrtc_deinit(ctx);
@@ -505,6 +521,9 @@ vm_reset_vdevs(struct vmctx *ctx)
vrtc_init(ctx);
vpit_init(ctx);
if (debugexit_enabled)
init_debugexit();
ioapic_init(ctx);
init_pci(ctx);
@@ -684,6 +703,7 @@ enum {
CMD_OPT_PART_INFO,
CMD_OPT_TRUSTY_ENABLE,
CMD_OPT_PTDEV_NO_RESET,
CMD_OPT_DEBUGEXIT,
};
static struct option long_options[] = {
@@ -720,6 +740,7 @@ static struct option long_options[] = {
CMD_OPT_TRUSTY_ENABLE},
{"ptdev_no_reset", no_argument, 0,
CMD_OPT_PTDEV_NO_RESET},
{"debugexit", no_argument, 0, CMD_OPT_DEBUGEXIT},
{0, 0, 0, 0 },
};
@@ -869,6 +890,9 @@ main(int argc, char *argv[])
case CMD_OPT_PTDEV_NO_RESET:
ptdev_no_reset(true);
break;
case CMD_OPT_DEBUGEXIT:
debugexit_enabled = true;
break;
case 'h':
usage(0);
default: