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hv: add enter_s3

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enter_s3 is main function for ACRN to enter S3 state with following
process:
 - pause vm0
 - save the wakeup vec of vm0 and set wakeup vec of ACRN. So
   resume from S3 will jump to ACRN wakeup
 - offline APs
 - update the main entry of trampoline to resume entry. After BSP
   is resume from S3, it will jump to resume entry instead of AP
   startup routine
 - turn off vmx
 - suspend devices
 - enter S3.

exit S3 with following process:
 - release trampoline_spinlock which is hold in trampoline code
 - resume devices
 - enable vmx
 - update the main entry of trampoline to AP startup routine.
 - online APs.

The following operations will be resume vm0 which will be added
in next patch.

Signed-off-by: Zheng Gen <gen.zheng@intel.com>
Signed-off-by: Yin Fengwei <fengwei.yin@intel.com>
Acked-by: Eddie Dong <eddie.dong@intel.com>
This commit is contained in:
Yin Fengwei
2018-06-14 10:50:34 +08:00
committed by Xie, nanlin
parent d34700a1ae
commit 02d819144e
3 changed files with 135 additions and 1 deletions
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4
hypervisor/include/arch/x86/host_pm.h
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@@ -5,6 +5,10 @@
#ifndef HOST_PM_H
#define BIT_WAK_STS 15U
int enter_s3(struct vm *vm, uint32_t pm1a_cnt_val,
uint32_t pm1b_cnt_val);
extern void __enter_s3(struct vm *vm, uint32_t pm1a_cnt_val,
uint32_t pm1b_cnt_val);
extern void restore_s3_context(void);