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dm: introduce system/full reset and suspend

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Guest has erquirement to support system/full reboot and S3. Which could
trigger different reset path in guest

Signed-off-by: Yin Fengwei <fengwei.yin@intel.com>
Acked-by: Anthony Xu <anthony.xu@intel.com>
This commit is contained in:
Yin Fengwei
2018-05-21 16:32:32 +08:00
committed by lijinxia
parent 76662a634f
commit 8d12c06270
6 changed files with 24 additions and 15 deletions
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22
devicemodel/arch/x86/pm.c
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@@ -25,6 +25,9 @@
* SUCH DAMAGE.
*/
#include <sys/cdefs.h>
#include <sys/types.h>
#include <stdio.h>
#include <assert.h>
#include <errno.h>
#include <pthread.h>
@@ -53,7 +56,6 @@ reset_handler(struct vmctx *ctx, int vcpu, int in, int port, int bytes,
uint32_t *eax, void *arg)
{
int error;
static uint8_t reset_control;
if (bytes != 1)
@@ -63,15 +65,17 @@ reset_handler(struct vmctx *ctx, int vcpu, int in, int port, int bytes,
else {
reset_control = *eax;
/* Treat hard and soft resets the same. */
if (reset_control & 0x4) {
error = vm_suspend(ctx, VM_SUSPEND_RESET);
assert(error == 0 || errno == EALREADY);
}
/* cold reset should clear the value in 0xcf9 */
if (reset_control & 0x8) {
if (*eax & 0x8) {
fprintf(stderr, "full reset\r\n");
error = vm_suspend(ctx, VM_SUSPEND_FULL_RESET);
assert(error ==0 || errno == EALREADY);
mevent_notify();
reset_control = 0;
} else if (*eax & 0x4) {
fprintf(stderr, "system reset\r\n");
error = vm_suspend(ctx, VM_SUSPEND_SYSTEM_RESET);
assert(error ==0 || errno == EALREADY);
mevent_notify();
}
}
return 0;